01115/04 GB

Motorised zone valvesZ-oneseries 642 - 643

Function

The zone valves allow the automatic shut-off of circuits in heatingand air conditioning systems.

The series 642 (two-way) and 643 (three-way) zone valves areequipped with a spring return actuator with a synchronous motorand auxiliary microswitch. They are therefore extremely versatileand suitable for use in both heating and air conditioning systems.

The actuator is fitted with a mechanism for rapidly clipping it ontothe body of the valve which also makes it easy to remove.

Product range

Series 642 Two-way motorised zone valve sizes: 1/2”; 3/4” and 1” Series 643 Three-way motorised zone valve sizes: 1/2”; 3/4” and 1”

C ALEF F Icert. n° 0003ISO 9001

Technical specification

Valve bodyMaterials: - body: brass, EN 12165 CW617N

- paddle stem: stainless steel- paddle: EPDM

Medium: water, gycol solutionsMax. percentage of glycol: 30%

Temperature range: 0 – 90°CPeak temperature of fluid: 110°CMax. working pressure: 16 barConnections: 1/2”, 3/4”, 1” F

ActuatorMaterials: - base and cover: PC G10

Synchronous motor: Normally closedSupply: 230 V - 50 HzPower consumption: 6,5 W; 7 VAOpening time: 70 – 75 sClosing time: 5 – 7 sMicroswitch contacts rating: 0,8 AProtection class: IP 40Max. ambient temperature: 40°CComplies with Directives: 73/23/EC and 89/336/ECLength of power cable: 95 cm

Dimensions

BA( NC)

B787888

A1/2”3/4”

1”

C31,531,546,5

B787888

A1/2”3/4”1”

C242424

D909494

Code642042642052642062

D90,594,594,5

AB

B

W eight (kg)

0,970,981,10

Code643042643052643062

Weight (kg)

1,031,051,20

BAAB

(NA)(NC)

Operating principle

With the electrical supply off, the actuator keeps the valve in theclosed position. When an ambient temperature thermostat or otherelectrical device switches the supply on, the actuator moves thepaddle into the open position.When the supply is turned off, the valve closes again due to theaction of a return spring.

Construction details

• Auxiliary microswitchThe actuator is fitted with a microswitch to operate devices such as,for example, a circulating pump. The microswitch comes on whenthe valve is 60% open.

• Manual openingThe valve can be opened manually by movingthe lever to lock open position. When thepower is re s t o red the manual control isautomatically overr i d d e n .

• Clip on actuatorA rapid clip-on system makes it easy toremove it from the body of the valve formaintenance or replacement operations.Warning: the actuator can only be usedwith valve bodies 642 and 643 series.

• OperationThe actuator is fitted with a special mechanism for gradualmovement of the valve paddle which prevents judder and vibrationdue to the inertia of the gearmotor.

Flow curves

1,4

1,8

18

12

80

60

80

160140

600700

16001400

1800

800

70

90

120

3000

50

100

200

500

1000

2000

4000

1200

900

180

300

400

40

30

16

10

2014

G (l/h)

�P (mm w.g.)

0,5

1

2

5

10

20

40

0,1

0,2

30

18161412

9876

4

3

1,6

1,2

0,8

0,60,7

0,9

0,4

0,3

0,18

0,12

0,160,14

�P ( kPa)

1,4

1,8

18

12

80

60

80

160140

600700

16001400

1800

800

70

90

120

3000

50

100

200

500

1000

2000

4000

1200

900

180

300

400

40

30

16

10

2014

G (l/h)

�P (mm w.g.)

0,5

1

2

5

10

20

40

0,1

0,2

30

18161412

9876

4

3

1,6

1,2

0,8

0,60,7

0,9

0,4

0,3

0,18

0,12

0,160,14

�P ( kPa)1/2” 3/4” 1”

1/2” 3/4” 1”

BA(NC)

BAAB

(NA )(NC)

Valve operating states

642 series 2-way zone valve

A B

A B

AB

643 series3-way zone valve

2 way 3 wayWith supply off Passage “A” closed “A” closed

“B” open“AB” open

With supply on Passage “A” open “A” open“B” closed“AB” open

Opened manually Passage “A” open “A” open“B” open

“AB” open

Connection Kv (m3/h) Max. differential pressure (kPa)(2-way) (3-way)

1/2” 2,5 2,5 2103/4” 4,5 4,5 1501” 6 6 100

Installation

- The valve can be fitted either vertically or horizontally, with the actuator in any position, except upside down.

- When installed inside a casing it is important to ensure that there isadequate ventilation inside the casing itself.

- The three-way valve cannot be transformed into a two-way valve and viceversa.

- When zone valves are installed, the correct direction of flow must beobserved as shown in the diagrams below.

- Two-way zone valves can be installed on both the flow and return sides;the direction of flow indicated by the arrow on the body of the valve mustbe observed.

2-way (with the power off, passageA is closed)

2-way installed on the flow side

B

3-way (with the power off, passageA is closed)

360°

A

B

AB

A

A B

2-way installed on the return side

AB

3-way installed on the flow side withdiverter position and ON/OFF services

B A

AB

3-way installed on the return side withmixer position and ON/OFF services

B A

AB

BA(NC)

A BAB

(NC) (NO)

Removal of the actuator

1. Set the lever on the side of the actuator to the openposition (or to manual opening).

2. Press the open button on the side of the actuatorand remove the actuator.

Fitting of the actuator

1. Set the lever on the side of the actuator to the open position (or manual opening).

2. Check that the actuator is correctly positioned with respect to the valve as determined by the different dimensions of the operating stem and the locking pin.

3. P ress the open button fully down. Clip on theactuator and release the button.

1 2

2 3

LN

Thermostat

230 V / 50 Hz

Brown

BlueGreyOrange

1234

1 2 3 4

M

5

Yellow/Green5

Electrical connections

We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.

CALEFFI S.P.A. · I · 28010 FONTANETO D’AGOGNA (NO) · S.R. 229, N.25 · TEL. +39 0322 8491 · FAX +39 0322 863723· H t t p : / / w w w. c a l e ffi.com · E-mail: info@caleffi.it ·

CALEFFI

Application diagramApplication diagrams

Two-pipe system

Zone system

CHILLER

RT�

RT RT

Shut-off valve

Manual valve

Electric pump

Room thermostat

Check valve

Insulated manifold

Differential by-pass

Adjustable differentialby-pass

RT

Series 642Two-way motorised zone valve. Threaded connections 1/2” F (from 1/2” to 1”). Brass body. Valve stem in EPDM.Cover in reinforced polycarbonate. Temperature range: 0 – 90°C. Peak temperature of fluid: 110°C. Maximum workingpressure: 16 bar. Maximum differential pressure: 210 kPa (1/2”: 210 kPa, 3/4”: 150 kPa, 1”: 100 kPa). Maximum percentageof glycol: 30%. Actuator: Voltage 230 V (ac). Power consumption: 6,5 W; 7 VA. Maximum ambient temperature: 40°C.Opening time: 70 – 75 s. Closing time: 5 – 7 s. Fitted with auxiliary microswitch, contacts rating: 0,8 A. Protection class: IP 40.

Series 643T h ree-way motorised zone valve. Threaded connections: 1/2” F (from 1/2” to 1”). Brass body. Valve stem in EPDM.Cover in re i n f o rced polycarbonate. Te m p e r a t u re range: 0-90°C. Peak temperature of fluid: 110°C. Maximum workingp re s s u re: 16 bar. Maximum diff e rential pre s s u re: 210 kPa (1/2”: 210 kPa, 3/4”: 150 kPa, 1”: 100 kPa). Maximum perc e n t a g eof glycol: 30%. Actuator: Voltage 230 V (ac). Power consumption: 6,5 W; 7 VA. Maximum ambient temperature: 40°C.Opening time: 70 – 75 s. Closing time: 5 – 7 s. Fitted with auxiliary microswitch, contacts rating: 0,8 A. Protection class: IP 40.

SPECIFICATION SUMMARIES