Upload
duonglien
View
217
Download
0
Embed Size (px)
Citation preview
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Tankless Installation / Optional Return Circulation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
RemoteControl
Expansion Tank
Circulation Pump
Small 10 - 15 Gallon Point-of-Use Water Heater
Single Tankless Water Heater and Optional Return Circulation:One single, small capacity water heater that will serve to maintain the temperature of the recirculation loop. The recirculation loop shall be returned to the cold water inlet of the small tank-type water heater. It is recommended that the circulation pump be placed on a timer or controlled by an immersion thermostat.
Printed in U.S.A 01/09 Form No. RTG11140A
Drawn by: SMTEng Approval: RM
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
EZ-Link Manifold Installation / Optional Return Circulation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
EZ-LinkCable
Expansion Tank
Circulation Pump
Small 10 - 15 Gallon Point-of-Use Water Heater
EZ-Link Manifold Installation and Optional Return Circulation:Two tankless water heaters of like models shall be installed in a parallel manifold, connected with the EZ-Link cable. Only one remote control will be used connected to a single tankless water heater. These units will feed a single, small capacity water heater that will serve to maintain the temperature of the recirculation loop. The recir-culation loop shall be returned to the cold water inlet of the small tank-type water heater. It is recommended that the circulation pump be placed on a timer or controlledby an immersion thermostat.
Printed in U.S.A 01/09 Form No. RTG11141
Drawn by: SMTEng Approval: RM
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
EZ-Link Manifold Installation / Optional Return Circulation
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
EZ-LinkCable
Small 10 - 15 Gallon Point-of-Use Water Heater
EZ-Link Manifold Installation and Optional Return Circulation:Two tankless water heaters of like models shall be installed in a parallel manifold, connected with the EZ-Link cable. Only one remote control will be used connected to a single tankless water heater. Recirculation Option A: The recirculation loop shall be returned to the cold water inlet of the small tank-type water heater with the hot water outlet connected to the hot water line feeding the fixtures. The tank temperature and aquastat should be set 5˚F below the tankless thermostat setting, the timer set for peak demand periods. The pump shall be sized according to the loop head loss.Recirculation Option B: The recirculation loop shall be returned to the cold water manifold feeding the tankless. It is required that the circulation pump be placed on a timer and controlled by an immersion thermostat. The aquastat shall be set 10˚F below the thermostat setting of the tankless, the timer shall be set for peak demand periods. The pump shall be sized for 5 GPM @ 25’ of head plus the loop head loss.
Printed in U.S.A. 01/11 Form No. RTG11141 Rev 2
CirculationPump
Hot Water to Fixtures
Cold Water Supply
GasSupply
ExpansionTank
DedicatedReturn
DedicatedReturn
CirculationPump
RECIRCULATION OPTION A
RECIRCULATION OPTION B
ImmersionAquastat
ImmersionAquastat
Timer
Timer
F
PRIORITY
POWERON/OFF
Tankless Water Heater Installation Diagrams
Heavy Duty Tankless Manifold Equipment Schedule
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Printed in U.S.A 07/07 Form No. RTG11145
Tan
kle
ss U
nit
s M
anif
old
ed
MIC
-18
0 C
on
tro
ller
MIC
S-1
80
Co
ntr
olle
r
MIC
-K*
Cab
le
AP
12
99
3C
Rel
ief
Val
ve
AP
13
89
2 Is
ola
tio
nV
alve
Kit
s †
Max
imu
m S
yste
m
Flo
w R
ate
(gp
m)
Min
. Ho
t Wat
er
Hea
der
Siz
e (i
n.)
**
Min
. Co
ld W
ater
H
ead
er S
ize
(in
.) *
*
Syst
em T
ota
l Gas
In
pu
t (b
tuh
)
Min
. Nat
ura
l Gas
H
ead
er S
ize
(in
.) *
**
Min
. LP
Gas
H
ead
er S
ize
(in
.) *
***
2 1 0 2 2 2 14.8 1 1 399,800 1 ¾
3 1 0 3 3 3 22.2 1 1 599,700 1 ¼ 1
4 1 0 4 4 4 29.6 1 ¼ 1 ¼ 799,600 1 ¼ 1
5 1 0 5 5 5 37 1 ½ 1 ½ 999,500 1 ¼ 1
6 1 0 6 6 6 44.4 1 ½ 1 ½ 1,199,400 1 ½ 1 ¼
7 1 1 7 7 7 51.8 2 2 1,399,300 1 ½ 1 ¼
8 1 1 8 8 8 59.2 2 2 1,599,200 2 1 ¼
9 1 1 9 9 9 66.6 2 2 1,799,100 2 1 ½
10 1 1 10 10 10 74 2 2 1,999,000 2 1 ½
11 1 1 11 11 11 81.4 2 2 2,198,900 2 ½ 1 ½
12 1 1 12 12 12 88.8 2 2 2,398,800 2 ½ 1 ½
13 1 1 13 13 13 96.2 2 ½ 2 ½ 2,598,700 2 ½ 2
14 1 1 14 14 14 103.6 2 ½ 2 ½ 2,798,600 2 ½ 2
15 1 1 15 15 15 111 2 ½ 2 ½ 2,998,500 2 ½ 2
16 1 1 16 16 16 118.4 2 ½ 2 ½ 3,198,400 3 2
17 1 1 17 17 17 125.8 3 3 3,398,300 3 2
18 1 1 18 18 18 133.2 3 3 3,598,200 3 2
19 1 1 19 19 19 140.6 3 3 3,798,100 3 3
20 1 1 20 20 20 148 3 3 3,998,000 3 3
OPTIONAL EQUIPMENT AND ACCESSORIESMIC-180 Multiple Unit Controller - controls up to 6 units
MICS-180 Multiple Unit Extender - add on to the MIC-180 for control of up to 20 units
MIC-K Cables Multiple Unit Control Cables, available in 16-, 32-, and 65-foot lengths
AP12993C Pressure Relief Valve - 150 PSI
AP13892 Isolation Valve Kit - includes shut-off valves
MIC-K cable length to be selected based upon water heater layout. ow ball valves should be used as a standard
Smooth copper pipe sizesBlack iron pipe sizes (nominal 7 in. w.c. pressure)Black iron pipe sizes (nominal 11 in. w.c. pressure)
*†**
*******
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Multiple Unit Manifold Installation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
Multiple Unit Manifold Installation:Multiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. The manifold controller will manage the operation of the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Sched-ule, Form No. RTG11145, for details on pipe size and suggested equipment.
Printed in U.S.A 01/09 Form No. RTG11142
Tankless Water Heater
Manifold Controller
CommunicationCables
Drawn by: SMTEng Approval: RM
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Multiple Unit Manifold Installation with Direct Recirculation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
Expansion Tank
Circulation Pump
Multiple Unit Manifold Installation with Direct Recirculation:Multiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. The manifold controller will manage the operation of the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Schedule, Form No. RTG11145, for details on pipe size and suggested equip-ment. The return circulation line shall be connected back to the cold water manifold, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heater, atleast 5 GPM at 25 foot of head. Also, an expansion tank must be installed on the system.
Printed in U.S.A 01/09 Form No. RTG11143
Tankless Water Heater
Manifold Controller
Communication Cables
Drawn by: SMTEng Approval: RM
Multiple Unit Manifold Installation with Alternate Indirect RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Sched-ule, Form No. RTG11145, for details on pipe size and suggested equipment. The hot water main return circulation shale be installed according to code and shall circulate through a small storage vessel or point of use water heater that is not connect to
electricity. The tankless water heaters shall maintain the temperature of the storage vessel through a secondary circulation loop with a thermostatically controlled pump. The secondary circulation system shall be plumbed so that hot water from the tankless does not return directly to the tankless inlet until it has passed through the storage vessel and so that the hot water main return does not directly recirculate through the tankless water heaters. An immersion aquastat shall control the operation of the secondary circulation pump so that when the temperature of the storage vessel is reached it will turn off the pump. It is recommended that the hot water main circulation line also be controlled by an aquastat and or timer.
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Multiple Unit Manifold Installation with Alternate Indirect Recirculation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
Expansion TankCirculation Pump
Printed in U.S.A 01/09 Form No. RTG11144
Tankless Water Heater
Manifold Controller
Communication Cables
Circulation Pump
Small 10 - 15 Gallon Point-of-Use Water Heater
or Storage Tank
Hot Water Supply
Cold Water
Return
Expansion Tank
Gas
ImmersionAquastat
Drawn by: SMTEng Approval: RM
Multiple Unit Manifold Installation with Dual Temperature RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate
through the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Schedule, Form No. RTG11145, for details on pipe size and suggested equip-ment. The high temperature return circulation line shall be connected back to the main cold water manifold, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heaters. The low/second temperature return circulation line will be connected back to a small point-of-use tank-type water heater, with a circulation pump controlled by a timer and/or an immersion thermostat control. The tank-type heater will maintain the temperature of the second recirculation loop. Two expansion tanks must be installed, one on each recirculation system.
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Multiple Unit Manifold Installation with Dual Temperature Recirculation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
Expansion Tank
Circulation Pump
Printed in U.S.A 01/09 Form No. RTG11146
Tankless Water Heater
Manifold Controller
Communication Cables
Circulation Pump
Small 10 - 15 Gallon Point-of-Use Water Heater
Thermostat set to 110˚F
Thermostatic Tempering Valve
110˚F Water Supply
140˚F Water Supply
Cold Water
110˚F Return
140˚F Return
Expansion Tank
Drawn by: SMTEng Approval: RM
Single Unit Installation with Dual Temperature RecirculationA single tankless water heater shall be installed using code-approved isolation valves and unions to allow service. Piping or the plumbing manifold should be properly sized for the tankless water heater being installed. The high temperature
return circulation line shall be connected back to the main cold water manifold, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heaters. The low/second temperature return circulation line will be connected back to a small point-of-use tank-type water heater, with a circulation pump controlled by a timer and/or an immersion thermostat control. The tank-type heater will maintain the temperature of the second recirculation loop. Two expansion tanks must be installed, one on each recirculation system.
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Dual Temperature Recirculation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
RemoteControl
Expansion Tank
Circulation Pump
Printed in U.S.A 01/09 Form No. RTG11147
Circulation Pump
Small 10 - 15 Gallon Point-of-Use Water Heater
Thermostat set to 110˚F
Thermostatic Tempering Valve
110˚F Water Supply
140˚F Water Supply
Cold Water
110˚F Return
140˚F Return
Expansion Tank
Drawn by: SMTEng Approval: RM
Single Unit Installation with Dual Temperature RecirculationA single tankless water heater shall be installed using code-approved isolation valves and unions to allow service. Piping or the plumbing manifold should be properly sized for the tankless water heater being installed. The high temperature return circulation line shall be connected back to the cold water input of the Booser Heater, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heaters. The low/second temperature return circulation line will be connected back to the cold water main at the tankless water heater, with a circulation pump controlled by a timer and/or an immersion thermostat control. The booser heater will maintain the temperature of the second recirculation loop. Two expansion tanks must be installed, one on each recirculation system.
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Dual Temperature Recirculation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
RemoteControl
Expansion Tank
Circulation Pump
Printed in U.S.A 01/09 Form No. RTG11148
Circulation Pump
Small 10 Gallon Booster Water Heater
Thermostat set to 180˚F
Thermostatic Tempering Valve
180˚F Water Supply
120˚F Water Supply
Cold Water
180˚F Return
120˚F Return
Expansion Tank
Drawn by: SMTEng Approval: RM
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
EZ-Link Manifold Installation / Optional Return Circulation
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
EZ-LinkCable
Small 10 - 15 Gallon Point-of-Use Water Heater
EZ-Link Manifold Installation and Optional Return Circulation:Two tankless water heaters of like models shall be installed in a parallel manifold, connected with the EZ-Link cable. Only one remote control will be used connected to a single tankless water heater. Recirculation Option A: The recirculation loop shall be returned to the cold water inlet of the small tank-type water heater with the hot water outlet connected to the hot water line feeding the fixtures. The tank temperature and aquastat should be set 5˚F below the tankless thermostat setting, the timer set for peak demand periods. The pump shall be sized according to the loop head loss.Recirculation Option B: The recirculation loop shall be returned to the cold water manifold feeding the tankless. It is required that the circulation pump be placed on a timer and controlled by an immersion thermostat. The aquastat shall be set 10˚F below the thermostat setting of the tankless, the timer shall be set for peak demand periods. The pump shall be sized for 5 GPM @ 25’ of head plus the loop head loss.
Printed in U.S.A. 01/11 Form No. RTG11141 Rev 2
CirculationPump
Hot Water to Fixtures
Cold Water Supply
GasSupply
ExpansionTank
DedicatedReturn
DedicatedReturn
CirculationPump
RECIRCULATION OPTION A
RECIRCULATION OPTION B
ImmersionAquastat
ImmersionAquastat
Timer
Timer
F
PRIORITY
POWERON/OFF
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Tankless Installation With Air Handler and Domestic Water
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Single Tankless Water Heater with Domestic Water and Home Heating:One tankless water heater installed in a dual use system with domestic water and an air handler for home heating. The system will supply a maximum of 140˚F water to the air handler. A thermostatic tempering valve will provide control for the 120˚F domestic water temperature. The heating system will be controlled by a room thermostat or environmental control system. There will be a priority switch (flow detector) installed in the cold water source line. The priority switch will deactivate the circulation pump and air handler while water is being drawn from the cold water supply, such as for showering. The priority switch will reacti-vate the circulation pump and air handler when the domestic water supply is not in use. The circulation pump must be able to supply a minimum of 5 GPM at 35’ of head loss and shall be controlled by the room thermostat or environmental control system. An expansion tank shall be installed on the system to control thermal expansion when the air handle is in use. The air handler, circulation pump, and tankless water heater should be sized by a professional contractor or mechanical engineer to ensure proper operation.
Printed in U.S.A 10/07 Form No. RTG11149
° F
PRIORITY
POWERON/OFF
Tankless Water Heater Remote
Control
Expansion Tank
Circulation Pump
Thermostatic Tempering Valve
120˚F Domestic Water Supply
Cold Water
Air Handler30,000 to 60,000
Btu/hr with 140˚F Water
RoomThermostat
Priority Switch
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater
Multiple Unit Manifold Installation with Buffer Storage RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communica-tion cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Schedule, Form No. RTG11145, for details on pipe size and suggested equipment. The storage vessel will be fed direct from the tankless and act as a buffer between the fixtures and tankless. A Taco 0011 pump or greater shall be used to circulate the water from the storage vessel back to the tankless units and an immersion thermostat in the storage vessel will control the circulation pump so that the tankless are used only when the temperature of the tank drops. The tankless will also operate when a demand is placed on the system such as a hot water use fixture is turned on. A return circulation line from the fixtures will be feed back to the storage tank with an appropriately sized circulation pump, placed on a timer to limit the hours of operation.
Multiple Unit Manifold Installation with Buffer Storage Tank
° F
PRIORITY
POWERON/OFF
RemoteControl
Expansion Tank
Printed in U.S.A 01/09 Form No. RTG11150
Tankless Water Heater
Manifold Controller
Communication Cables
Circulation Pump
Hot Water Supply Cold Water
Gas
ImmersionAquastat
Hot Water To Fixtures
FIxture Return Line
Circulation Pump
Drawn by: SMTEng Approval: RM
Tank
less
Wat
er
Hea
ter
Tank
less
Wat
er
Hea
ter
Tank
less
Wat
er
Hea
ter
Mul
tiple
Uni
t Man
ifold
Inst
alla
tion
with
Dire
ct R
etur
n Re
circ
ulat
ion
Mul
tiple
tank
less
wat
er h
eate
rs o
f lik
e m
odel
s sh
all b
e in
stal
led
in a
par
alle
l m
anifo
ld, c
onne
cted
with
a c
omm
on m
anifo
ld c
ontr
ol th
roug
h co
mm
unic
a-tio
n ca
bles
, with
onl
y on
e re
mot
e co
ntro
l con
nect
ed to
the
man
ifold
con
trol
-le
r. T
he u
nits
will
ope
rate
in a
rand
om s
eque
nce
depe
ndin
g up
on th
e w
ater
flow
rate
thro
ugh
the
syst
em.
Pipi
ng o
r th
e pl
umbi
ng m
anifo
ld s
houl
d be
pro
perly
siz
ed fo
r the
num
ber o
f tan
kles
s w
ater
hea
ters
bei
ng in
stal
led.
See
the
Man
ifold
Equ
ipm
ent S
ched
ule,
For
m N
o. R
TG11
145,
for d
etai
ls o
n pi
pe s
ize
and
sugg
este
d eq
uipm
ent.
A T
aco
0011
pu
mp
or g
reat
er s
hall
be u
sed
to c
ircul
ate
the
wat
er fr
om th
e re
turn
reci
rcul
atio
n lin
e ba
ck to
the
tank
less
uni
ts a
nd
an im
mer
sion
ther
mos
tat i
n re
circ
ulat
ion
line
will
con
trol
the
circ
ulat
ion
pum
p so
that
the
tank
less
are
use
d on
ly
whe
n th
e te
mpe
ratu
re o
f the
loop
tem
pera
ture
dro
ps.
The
tank
less
will
als
o op
erat
e w
hen
a de
man
d is
pla
ced
on
the
syst
em s
uch
as a
hot
wat
er u
se fi
xtur
e is
turn
ed o
n. G
as P
ipe
Col
d W
ater
Pip
e
Hot
Wat
er P
ipe
Ret
urn
Circ
ulat
ion
Line
Uni
on
Shu
t-off
Valv
e
Circ
ulat
ion
Pum
p
Pre
ssur
e R
elie
f Va
lve
Che
ck V
alve
Col
d W
ater
Isol
ator
Va
lve
Ass
embl
y
Hot
Wat
er Is
olat
or
Valv
e A
ssem
bly
Tan
kles
s W
ater
Hea
ter I
nst
alla
tio
n D
iag
ram
sM
ult
iple
Un
it M
anifo
ld In
stal
lati
on
wit
h D
irec
t Re
turn
Cir
cula
tio
n
F
PRIO
RITY
PO
WE
RON/O
FF
This
dra
win
g is
inte
nded
as a
gui
de o
nly.
It is
not
to b
e us
ed a
s an
alte
rnat
ive
to
a pr
ofes
sion
ally
eng
inee
red
proj
ect
draw
ing.
Thi
s dr
awin
g do
es n
ot i
mpl
y
com
plia
nce
with
loc
al b
uild
ing
code
s. I
nsta
llatio
n m
ay v
ary,
dep
endi
ng o
n
inst
alla
tion
loca
tion,
and
mus
t be
don
e in
acc
orda
nce
with
all
loca
l bui
ldin
g
code
s. C
onsu
lt w
ith lo
cal b
uild
ing
offici
als p
rior t
o in
stal
latio
n.
Lege
nd
Tank
less
Wat
er
Hea
ter
Tank
less
Wat
er
Hea
ter
Rem
ote
Cont
rol
Expa
nsio
n Ta
nk
Prin
ted
in U
.S.A
02
/10
Fo
rm N
o. R
TG11
151
Tank
less
Wat
er
Hea
ter
Man
ifold
Co
ntro
ller
Com
mun
icat
ion
Cab
les
Hot
Wat
er S
uppl
yC
old
Wat
er
Gas
Imm
ersi
onAq
uast
at
Hot
Wat
er To
Fix
ture
s
FIxt
ure
Retu
rn L
ine
Circ
ulat
ion
Pum
p
Dra
wn
by:
SM
TEn
g A
pp
rova
l: R
M
Co
ld W
ater
Mix
ing
Valv
e(O
ptio
nal)
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater Installation DiagramsMultiple Unit Manifold Installation Stacked Configuration
° F
PRIORITY
POWERON/OFF
Tankless Water Heater
Tankless Water Heater Remote
Control
Expansion Tank
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnionShut-off Valve Circulation
PumpPressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
This drawing is intended as a guide only. It is not to be used as an alternative to a professionally engineered project drawing. This drawing does not imply compliance with local building codes. Installation may vary, depending on installation location, and must be done in accordance with all local building codes. Consult with local building officials prior to installation.
Printed in U.S.A 03/08 Form No. PII030706
Tankless Water Heater
Manifold Controller
Communication Cables
Hot Water Supply
Cold Water
Gas
Expansion Tank
Return Line
Circulation Pump
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation DiagramsTankless Installation / Demand Return Circulation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative
to a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
RemoteControl
ExpansionTank
Printed in U.S.A. 06/08 Form No. RTG11154
Room Motion Sensor or Trigger Switch Check with the Manufacture for
options
Shower or Bath
Lavatory or Sink Faucet
Kitchen or Sink Faucet
Metlund S-70T or S-02T D’MAND® System
or equivalent
Single Tankless Water Heater and Demand Return Circulation: A demand return circulation system is one that the pump is controlled by system as to where the pump is only operated for a short duration to bring hot water to the desired fixture. A demand system operates with either a push button or motion detector and shut off as soon as hot water reaches the fixture. A circulation pump with a timer and/or aquastat is not considered a demand pump as they can continuously run. The Metlund D’MAND® System is an alternative to a hot water circulation loop and operates in a manner
that only runs when hot water is needed at the fixture. A demand system of this type does not impact the warranty of our tankless water heaters.This drawing demonstrates a basic installation of a demand system with a tankless water
heater. Follow the manufactures recommended installation instructions and guidelines. Drawn by: SMTEng Approval: RM
Multiple Unit Manifold Installation with Buffer Tank and Demand RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Sched-ule, Form No. RTG11145, for details on pipe size and suggested equipment. The hot water main shall be installed according to code and shall pass through a small water heater or storage tank that will be used as a buffer tank to eliminate the cold water
sandwich effect from short cycle usage. The buffer tank shall have openings sized to match the manifold pipe size. The main hot water line will feed branch fixtures after the buffer tank. A demand or thermostatically controlled circulation pump, such as the Metlund S-70T or S-02T, or the Laing ACT-909, shall be installed on each branch at the furthermost fixture. These pumps will operate to draw hot water to the fixture by pushing the cold water back through the cold water supply line. When the hot water reaches a given temperature as set by the pump manufac-ture, the pump will shut off. This application is ideal in salons, public rest rooms, and nursing homes where the draw demands on hot water are short and spaced apart.
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation Diagrams
Multiple Unit Manifold Installation with Buffer Tank and Demand Recirculation
° F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
Tankless Water Heater
RemoteControl
Expansion Tank
Printed in U.S.A 03/09 Form No. RTG11155
Tankless Water Heater
Manifold Controller
Communication Cables
Small 10 - 15 Gallon Point-of-Use Water Heater
With Openings Large Enough to Accommodate Manifold Pipe Size
Cold Water
Gas
Drawn by: SMTEng Approval: RM
Room Motion Sensor, Push Button Trigger
Switch, or Timer Control
Kitchen or Sink Faucet
Metlund S-70T or S-02T D’MAND® System
or Laing ACT-909 System
Gas Pipe
Cold Water Pipe
Hot Water Pipe
Return Circulation LineUnion
Shut-off Valve
Circulation Pump
Pressure Relief Valve
Check Valve
Cold Water Isolator Valve Assembly
Hot Water Isolator Valve Assembly
Tankless Water Heater Installation DiagramsTankless Installation as Solar Booster
F
PRIORITY
POWERON/OFF
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Legend
Tankless Water Heater
RemoteControl
Expansion Tank
Single Tankless Water Heater as a Solar Booster :A tankless unit will be connected inline with the hot water output of a solar storage tank and the hot water supply to the fixtures. The supply to the tankless must be connected to a thermostatic mixing valve so
that the tankless does not receive water exceeding 140F. The tankless unit(s) should be sized according to the total demand of the application. When the water temperature drops below the T-stat setting on the tankless and the flow is great enough, the tankless unit will engage. Refer to the tankless Use and Care manual for installation instructions and recommendations for the tankless water heater.
Printed in U.S.A 06/10 Form No. RTG11160 Rev 2
SolarStorage Tank
SolarPanels
Domestic Hot Water Supply
Thermostatic Tempering Valve *
NOTE: A temperating valve must be installed on the hot water outlet from the solar tank feeding the inlet to the tankless water heater.
Water Supply to Tankless
Domestic Cold Water Supply
Solar Fluid
Tankless Water Heater Installation Diagrams
RTG20147 Concentric Direct Vent Kit - Typical Installation
This drawing is intended as a guide only. It is not to be used as an alternative to
a professionally engineered project drawing. This drawing does not imply
compliance with local building codes. Installation may vary, depending on
installation location, and must be done in accordance with all local building
codes. Consult with local building officials prior to installation.
Printed in U.S.A 01/09 Form No. RTG11175
The RTG20147 Kit Contains: (1) 3/5" Appliance Adapter - RTG20144(1) 3/5" Horizontal Termination - RTG20128(1) 94 Degree 3/5" Elbow - No Rheem Part Number (2) 12" Wall Plate, Screws - No Rheem Part Number(1) 3/5" Concentric 12" Vent Pipe - RTG20151R(1) Relief Valve - AP12993C(1) 10ft T-Stat Wire - RTG20009-1
ApplianceAdapter
94 DegreeElbow
WallPlate
WallPlate
12” VentPipe
HorizontalTermination
See Drawing RTG11140 for typical piping installations.
RTG-95DV Direct Vent Water HeaterWater Heater(s) shall be internally mounted, in-
stantaneous, multiple point-of-use, gas fired, direct vent, water heater(s) design certified to the ANSI Z21.10.3 standard for gas-fired water heaters. (Each) Water Heater shall produce no more than 55 ppm NOx (40 ng/J) emissions when tested in accordance with the Rules and Regulations of the South Coast Air Quality Management District (SCAQMD). Said water heater(s) shall be configured to operate with ____________(natural/propane) gas and a 120 volt/60 Hz AC power source.
Unit(s) shall have a BTU input range of11,000 BTU/hr to 199,900 BTU/hr, a minimum recovery efficiency rating of 82%, a minimum hot water outlet capacity of 9.5 gallon per minute (with a 35 °F temperature rise), and a minimum operating flow rate of 0.26 (0.40 activation) gallon per minute (with a 35 °F tem-perature rise). Water Heater(s) shall be microproces-sor controlled and utilize a direct electronic ignition system (with no standing pilot), fully modulating gas control valve, turbine water flow meter, automatic electro-mechanical water flow control valve, and wa-ter temperature thermistors to maintain outlet water temperature between ± 2 °F of setpoint tempera-ture. Unit(s) shall incorporate the following internal safety devices: incomplete combustion sensing burner technology, film-type thermal overheat pro-tection covering entire heat exchanger, flame failure lockout, internal freeze protection for ambient tem-peratures as low as –30 °F, and lockout protection in the event of a blocked flue.
Water Heater(s) shall be provided with a remote temperature thermostat with an adjustable setpoint range of 85 °F to 140 °F. Unit(s) shall also be capable of storing and displaying up to 8 diagnostic mainte-nance codes, via the display on the remote tempera-ture thermostat controller(s). Water Heater(s) shall have a copper heat exchanger warranted against material defects or workmanship for a period of 12 years from the date of purchase, or 3 years from date of purchase when used as a circulating water heater within a hot water circulation loop or when used in a commercial application. Unit(s) shall have stain-less steel burners, cast aluminum gas control valve/gas connection, and solid brass inlet and outlet wa-ter connections. Unit(s) shall also be provided with a 120 volt/60 Hz AC power cord. These and all other parts shall be warranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulating water heater within a hot water circulation loop or when used in a commercial ap-plication.
Water Heater(s) shall be suitable for use in mul-tiple unit electronic manifold installations. Units shall have the ability to be manifolded electronically in configurations from 2-20 units. Temperature con-trol and diagnostic functions for all water heaters in manifold installations shall be controlled via a single remote temperature thermostat. Manifold installa-tions utilizing 2 water heaters shall be accomplished with simple cable-only interconnection (EZ-Link). Manifold installations utilizing up-to water heaters shall utilize an internal electronic manifold control-ler (MIC-6) which, or up-to 20 units with an external manifold controller system (MIC-185/MICS-180).
RTG-95X Outdoor Water Heater Water Heater(s) shall be externally mounted,
instantaneous, multiple point-of-use, gas fired, di-rect vent, water heater(s) design certified to the ANSI Z21.10.3 standard for gas-fired water heaters. (Each) Water Heater shall produce no more than 55 ppm NOx (40 ng/J) emissions when tested in accor-dance with the Rules and Regulations of the South Coast Air Quality Management District (SCAQMD). Said water heater(s) shall be configured to operate with ____________(natural/propane) gas and a 120 volt/60 Hz AC power source.
Unit(s) shall have a BTU input range of 11,000 BTU/hr to 199,900 BTU/hr, a minimum recovery ef-ficiency rating of 82%, a minimum hot water outlet capacity of 9.5 gallon per minute (with a 35 °F tem-perature rise), and a minimum operating flow rate of 0.26 (0.40 activation) gallon per minute (with a 35 °F temperature rise). Water Heater(s) shall be microprocessor controlled and utilize a direct elec-tronic ignition system (with no standing pilot), fully modulating gas control valve, turbine water flow meter, automatic electro-mechanical water flow control valve, and water temperature thermistors to maintain outlet water temperature between ± 2 °F of setpoint temperature. Unit(s) shall incor-porate the following internal safety devices: film-type thermal overheat protection covering entire heat exchanger, flame failure lockout, and inter-nal freeze protection for ambient temperatures as low as –30 °F.
Water Heater(s) shall be provided with a remote temperature thermostat with an adjustable setpoint range of 85 °F to 140 °F. Unit(s) shall also be capable of storing and displaying up to 8 diagnostic mainte-nance codes, via the display on the remote tempera-ture thermostat controller(s). Water Heater(s) shall have a copper heat exchanger warranted against material defects or workmanship for a period of 12 years from the date of purchase, or 3 year from date of purchase when used as a circulating water heater within a hot water circulation loop or when used in a commercial application. Unit(s) shall have stainless steel burners, cast aluminum gas control valve/gas connection, and solid brass inlet and outlet water connections. These and all other parts shall be war-ranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulat-ing water heater within a hot water circulation loop or when used in a commercial application.
Water Heater(s) shall be suitable for use in mul-tiple unit electronic manifold installations. Units shall have the ability to be manifolded electronically in configurations from 2-20 units. Temperature con-trol and diagnostic functions for all water heaters in manifold installations shall be controlled via a single remote temperature thermostat. Manifold installa-tions utilizing 2 water heaters shall be accomplished with simple cable-only interconnection (EZ-Link). Manifold installations utilizing 2 water heaters shall be accomplished with simple cable-only intercon-nection (EZ-Link). Manifold installations utilizing up-to water heaters shall utilize an internal electronic manifold controller (MIC-6) which, or up-to 20 units with an external manifold controller system (MIC-185/MICS-180).
RTG-95 Commercial InstallationWater Heater(s) shall be convertible to operate
at higher temperature rating for a commercial ap-plication. A conversion kit; containing a program chip, commercial warranty, conversion decal, and instructions, for each specific mode is available. This program chip will upgrade the programming in the water heater(s) to allow an adjustable temperature setpoint range from 85 °F to 185 °F.
Water Heater(s) used in a commercial installation with a commercial conversion kit installed shall have a copper heat exchanger warranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulating water heater within a hot water circulation loop. Unit(s) shall have stainless steel burners, cast aluminum gas control valve/gas connection, and solid brass inlet and outlet water connections. These and all other parts shall be war-ranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulat-ing water heater within a hot water circulation loop.
While the RTG-95 model carries and NSF 5 Rating it cannot be used as a booster to supply a commer-cial dishwasher or other equipment requiring 180F water for sanitation. A NSF approved booster should be used for those applications.
Tankless Water Heater SpecificationRTG-95 Series Tankless Engineering Specification
Printed in U.S.A 07/10 Form No. RTG11166