1 of 8

- ApplicationBoiler Control 260

A 260-1

03/09

Copyright ©2009 A 260-1 03/09

Note: This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance withcode requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the specified tekmar internal relay ratings), and other safetyand limit devices must be added.

P1

M MMT3 T2 T1

OutdoorSensor (S2) 070

BoilerSensor

(S1) 082

Z1Z2Z3

Class 2Transformer

120 V (ac) 24 V (ac)

260Mechanical

NL

Zone ValveMotor EndSwitches

U1

S1

S2Boiler

260

1 2 4 6 8 10 11Boiler

Demand L N

3Power

5 9Boil

Do not apply power

13 14 15 16 17 18Com

Sw

UnO ComBoil Out

12IndrDHW

Demand

7

P1 N

DHW

Pmp/VlvBoiler

10A 10A10A

24 V (ac)

120 V (ac)

Class 2Transformer

CR

P1

Z1

Z2

Z3

Electrical

P1 = Boiler PumpS1 = Boiler Sensor 082S2 = Outdoor Sensor 070T1, ..., T3 = ThermostatsU1 = tekmar Timer 033 (optional)Z1, ..., Z3 = Zone Valve Motor End Switches

OffInstaller

Advanced DHW during UnOcc

DHW Pump Off

DHW PriorityDHW Valve

= Not Used

= Required

= Optional

Product design, software and literature are Copyright © 2009 by:tekmar Control Systems Ltd. and tekmar Control Systems, Inc.

tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4Tel. (250) 545-7749 Fax. (250) 545-0650Web Site: www.tekmarcontrols.com

Control Systems

System Operation

All specifications are subject to change without notice.2 of 8

A 260-1 03/09

Printed in Canada. A 260-1 03/09.

The Boiler Control 260 provides partial or full outdoor reset to three (or more) boiler zones. The boiler is operated at the temperaturerequired in order to satisfy the load.

Heat Source Details The heat source can be either a high mass or low mass non-condensing or low temperature boiler.

Piping Details Thermostat controlled zone valves are piped into the boiler loop. The boiler pump (P1) provides circulation through thesezones when heat is required.

Boiler Demand When heat is required in the boiler zones, the zone valve end switches send a Boiler Demand to the 260. The 260 turnson the boiler pump (P1). The boiler supply water temperature is based on the Characterized Heating Curve settings. The boiler is firedto satisfy the required boiler supply water temperature. Whenever the boiler is fired, the 260 aims to increase the boiler supply watertemperature to at least the BOIL MIN setting.

All control functions and specifications are listed in the Product Catalog I 000 and Data Brochure D 260.

3 of 8

- ApplicationBoiler Control 260

A 260-2

03/09

Copyright ©2009 A 260-2 03/09

Note: This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance withcode requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the specified tekmar internal relay ratings), and other safetyand limit devices must be added.

Mechanical

DHWTank

MM MM

OutdoorSensor (S2) 070

P1BoilerSensor

(S1) 082

A2

A1

T3 T2 T1

Z1Z2Z3

Class 2Transformer

120 V (ac) 24 V (ac)

260

V1

V1

Electrical

A1 = DHW AquastatA2 = DHW High Limit AquastatP1 = Boiler PumpS1 = Boiler Sensor 082S2 = Outdoor Sensor 070T1, ..., T3 = ThermostatsU1 = tekmar Timer 033 (optional)V1 = DHW ValveZ1, ..., Z3 = Zone Valve Motor End Switches

Zone ValveMotor EndSwitches

Boiler

S1

S2U1

24 V (ac)

120 V (ac)

Class 2Transformer

NL

CR

P1

A1

A2

Z1

Z2

Z3

260

1 2 4 6 8 10 11Boiler

Demand L N

3Power

5 9Boil

Do not apply power

13 14 15 16 17 18Com

SwUnO ComBoil Out

12IndrDHW

Demand

7

P1 NDHW

Pmp/VlvBoiler

10A 10A10A

M= Required

= Optional

= Not Used

DHW Pump OffOffInstaller

Advanced DHW during UnOcc

DHW PriorityDHW Valve

Product design, software and literature are Copyright © 2009 by:tekmar Control Systems Ltd. and tekmar Control Systems, Inc.

tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4Tel. (250) 545-7749 Fax. (250) 545-0650Web Site: www.tekmarcontrols.com

Control Systems

System Operation

All specifications are subject to change without notice.4 of 8

A 260-2 03/09

Printed in Canada. A 260-2 03/09.

The Boiler Control 260 provides partial outdoor reset to three (or more) boiler zones. The 260 also controls the supply of heat to anindirect fired Domestic Hot Water (DHW) tank. The boiler is operated at the temperature required in order to satisfy the loads.

Heat Source Details The heat source can be either a high mass or low mass non-condensing boiler.

Piping Details Thermostat controlled zone valves are piped into the boiler loop. The boiler pump (P1) provides circulation through thesezones when heat is required. Heat is supplied to the DHW tank through a DHW valve (V1).

DHW Demand When the DHW aquastat (A1) calls for heat, the 260 turns on the boiler pump (P1), opens the DHW valve (V1), andraises the boiler water temperature to at least 180°F (82°C).

Boiler Demand When heat is required in the boiler zones, the zone valve end switches send a Boiler Demand to the 260. The 260 turnson the boiler pump (P1). The boiler supply water temperature is based on the Characterized Heating Curve settings. The boiler is firedto satisfy the required boiler supply water temperature. Whenever the boiler is fired, the 260 aims to increase the boiler supply watertemperature to at least the BOIL MIN setting.

All control functions and specifications are listed in the Product Catalog I 000 and Data Brochure D 260.

5 of 8

- ApplicationBoiler Control 260

A 260-3

03/09

Copyright ©2009 A 260-3 03/09

Mechanical

M MM

OutdoorSensor (S2) 070

DHWTank

Class 2Transformer

120 V (ac) 24 V (ac)

BoilerSensor

(S1) 082P1

P2

A2

A1

T1T2T3

Z1Z2Z3

260

Note: This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance withcode requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the specified tekmar internal relay ratings), and other safetyand limit devices must be added.

Electrical

A1 = DHW AquastatA2 = DHW High Limit AquastatP1 = Boiler PumpP2 = DHW PumpS1 = Boiler Sensor 082S2 = Outdoor Sensor 070T1, ..., T3 = ThermostatsU1 = tekmar Timer 033 (optional)Z1, ..., Z3 = Zone Valve Motor End Switches

Zone ValveMotor EndSwitches

Boiler

260

1 2 4 6 8 10 11Boiler

Demand L N

3Power

5 9Boil

Do not apply power

13 14 15 16 17 18Com

SwUnO ComBoil Out

12IndrDHW

Demand

7

P1 NDHW

Pmp/VlvBoiler

10A 10A10A

U1

S1

S2

24 V (ac)

120 V (ac)

Class 2Transformer

NL

CR

P2

P1A2

Z1

Z2

Z3

A1

= Required

= Optional

= Not Used

OffInstaller

Advanced DHW during UnOcc

DHW Pump Off

DHW PriorityDHW Valve

tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4Tel. (250) 545-7749 Fax. (250) 545-0650Web Site: www.tekmarcontrols.com

Control Systems

System Operation

All specifications are subject to change without notice.6 of 8

A 260-3 03/09

Product design, software and literature are Copyright © 2009 by:tekmar Control Systems Ltd. and tekmar Control Systems, Inc. Printed in Canada. A 260-3 03/09.

The Boiler Control 260 provides partial or full reset to three (or more) boiler zones. The 260 also controls the supply of heat to an indirectfired Domestic Hot Water (DHW) tank. The boiler is operated at the temperature required in order to satisfy the loads.

Heat Source Details The heat source can be either a high mass or low mass non-condensing or low temperature boiler. If using a lowtemperature boiler, refer to section C3 of the Data Brochure for additional information.

Piping Details Thermostat controlled zone valves are piped into the boiler loop. The boiler pump (P1) provides circulation through thesezones when heat is required. Heat is supplied to the DHW tank through a DHW pump (P2).

DHW Demand When the DHW aquastat (A1) calls for heat, the 260 turns on the DHW pump (P2) and raises the boiler water tempera-ture to at least 180°F (82°C). The control can provide DHW priority (refer to section C2 of the Data Brochure) by turning off the boilerpump (P1). Once the DHW demand is removed, the 260 performs a DHW Post Purge and possibly a Mixing Purge.

Boiler Demand When heat is required in the boiler zones, the zone valve end switches send a Boiler Demand to the 260. The 260 turnson the boiler pump (P1). The boiler supply water temperature is based on the Characterized Heating Curve settings. The boiler is firedto satisfy the required boiler supply water temperature. Whenever the boiler is fired, the 260 aims to increase the boiler supply watertemperature to at least the BOIL MIN setting.

All control functions and specifications are listed in the Product Catalog I 000 and Data Brochure D 260.

7 of 8

- ApplicationBoiler Control 260

A 260-4

03/09

Copyright ©2009 A 260-4 03/09

Note: This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance withcode requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the specified tekmar internal relay ratings), and other safetyand limit devices must be added.

Mechanical

BoilerSensor

(S1) 082

OutdoorSensor (S2) 070

DHWTank

A1

A2

P1Z2Z1 Z3

R1 R2 R3

T1 T2 T3

Class 2Transformer

120 V (ac) 24 V (ac)

260

Electrical

A1 = DHW AquastatA2 = DHW High Limit AquastatP1 = DHW PumpR1, ..., R3 = Relay 003S1 = Boiler Sensor 082S2 = Outdoor Sensor 070T1, ..., T3 = ThermostatsU1 = tekmar Timer 033 (optional)Z1, ..., Z3 = Zone Pumps

Boiler

260

1 2 4 6 8 10 11Boiler

Demand L N

3Power

5 9Boil

Do not apply power

13 14 15 16 17 18Com

SwUnO ComBoil Out

12IndrDHW

Demand

7

P1 NDHW

Pmp/VlvBoiler

10A 10A10A

24 V (ac)

120 V (ac)

Class 2Transformer

A2

P1

A1

= Required

= Optional

= Not Used

NL

U1

S1

S2

R1

R2

R3

Z1

Z2

Z3

T3

T2

T1

CR

34

65

7

218

34

65

7

218

34

65

7

218

Return

OffInstaller

Advanced DHW during UnOcc

DHW Pump Off

DHW PriorityDHW Valve

tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4Tel. (250) 545-7749 Fax. (250) 545-0650Web Site: www.tekmarcontrols.com

Control Systems

System Operation

All specifications are subject to change without notice.8 of 8

A 260-4 03/09

Product design, software and literature are Copyright © 2009 by:tekmar Control Systems Ltd. and tekmar Control Systems, Inc. Printed in Canada. A 260-4 03/09.

The Boiler Control 260 provides partial or full reset to three (or more) boiler zones. The 260 also controls the supply of heat to an indirectfired Domestic Hot Water (DHW) tank. The boiler is operated at the required temperature in order to satisfy the loads.

Heat Source Details The heat source can be either a high mass or low mass non-condensing or low temperature boiler. If using a lowtemperature boiler, refer to section C3 of the Data Brochure for additional information.

Piping Details Thermostat controlled zone pumps are piped into the boiler loop. Heat is supplied to the DHW tank through a DHWpump (P1).

DHW Demand When the DHW aquastat (A1) calls for heat, the 260 turns on the DHW pump (P1) and raises the boiler water tempera-ture to at least 180°F (82°C). The control can provide DHW priority (refer to section C2 of the Data Brochure) by turning off the Boil P1contact and not allowing any of the boiler zones to operate. Once the DHW demand is removed, the 260 performs a DHW Post Purgeand possibly a Mixing Purge.

Boiler Demand When heat is required in the boiler zones, the zone pump relays send a Boiler Demand to the 260. The boiler supplywater temperature is based on the Characterized Heating Curve settings. The boiler is fired to satisfy the required boiler supply watertemperature. Whenever the boiler is fired, the 260 aims to increase the boiler supply water temperature to at least the BOIL MIN setting.

All control functions and specifications are listed in the Product Catalog I 000 and Data Brochure D 260.