tekmar 370 House Control User Manual

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DHW Pump / Valve

Connect the 120 V (ac) or 24 V (ac) circuit from the DHW pump or the DHW valve to
terminals

DHW Pmp / Vlv — DHW Pmp / Vlv (20 and 21) on the control. The control

closes a dry relay contact between these terminals when DHW heating is required.

Zone Pumps and Zone Valves

It is best to start the heating zones at output relay

4 and work towards the output relay 1.

• If Zone 4 is used, connect the Zone 4 Pump or Valve circuit to the

Com 3-4 — 4

(27 and 29) terminals on the control.

• If Zone 3 is used, connect the Zone 3 Pump or Valve circuit to the

Com 3-4 — 3

(27 and 28) terminals on the control.

• If Zone 2 is used, connect the Zone 2 Pump or Valve circuit to the

Com 1-2 — 2

(24 and 26) terminals on the control.

• If Zone 1 is used for heating (DIP switch set to

Zone 1 Heating), connect the wire from

the Zone 1 Pump or Valve to the

Com 1-2 — 1 (24 and 25) terminals on the control.

Note

Do not connect a zone pump and zone valve circuit to the same

Com terminal.

The 370 closes a dry relay contact between the

Com and output terminals

when a zone requires heat.

Cooling System

If a cooling system is used and the DIP switch is set to

Zone 1 Cooling, connect the

wires from the cooling unit isolation relay to terminals

Com 1-2 — 1 (24 and 25) on

the control. The 370 closes a dry relay contact between these terminals when cooling
is required.

Sensor and Unpowered Input Connections

−−−−−−−−−−−−−−−−−−−−−−−−−−

Do not apply power to these terminals as this will damage the control.

Outdoor Sensor

Connect the two wires from the Outdoor Sensor 070 to the terminals

Com Sen — Out

Sen (14 and 17). The Outdoor Sensor measures the outdoor air temperature.

Supply Sensor

Connect the two wires from the Supply Sensor 071 to terminals

Com Sen — Sup Sen

(14 and 16). The Supply Sensor measures the supply water temperature after mixing
has occurred.

Boiler Sensor

Connect the two wires from the Boiler Sensor 071 to terminals

Com Sen — Boil Sen

(14 and 15). The Boiler Sensor measures the supply water temperature from the boiler.

Unoccupied Switch

If an external timer or switch is used, connect the two wires from the external dry contact
switch to the

Com Sen —UnO Sw (11 and 12) terminals. When these terminals short

together, the control registers an UnOccupied signal.

Note If an external switch is closed between the terminals

Com Sen — UnO Sw

(11 and 12), the 24 hr. Timer is disabled and the Optimum Start / Stop information
is lost. It is recommended that either the 24 hr. Timer or an external timer/ switch
is used, not both at the same time.

Zone Control Input

If an external Zone Control is used, connect the wire from the

Com Sen terminal on the

Zone Control to terminal

Com Sen (11) on the 370. Connect the wire from the Zo Out

terminal on the Zone Control to terminal

Zo In (13) on the 370.

Note The wires from the Zone Control are polarity sensitive. The system will not

operate if the wires are reversed.

Com

Sen

5 6

RTU

Boil

Sen

RTU

Com

Sen

UnO

Com

Sen

Com

Sen

Sup

Sen

Out

Sen

Com

Sen

5 6

RTU

Sup

Sen

Com

Sen

Out

Sen

Boil

Sen

RTU

Com

Sen

UnO

Com

Sen

Com

Sen

5 6

RTU

Out

Sen

Boil

Sen

RTU

Com

Sen

UnO

Com

Sen

Com

Sen

Sup

Sen

Com

Sen

5 6

RTU

Sup

Sen

Com

Sen

Out

Sen

Boil

Sen

RTU

Com

Sen

UnO

Com

Sen

Com

Sen

5 6

RTU

Sup

Sen

Com

Sen

Out

Sen

Boil

Sen

RTU

Com

Sen

UnO

Com

Sen

Com

3-4

18 19

Boiler

20 21

DHW

Pmp / Vlv

22 23

DHW

DemDem

Com

1-2

Com

3-4

18 19

Boiler

20 21

DHW

Pmp / Vlv

22 23

DHW

DemDem

Com

1-2

Com

3-4

18 19

Boiler

20 21

DHW

Pmp / Vlv

22 23

DHW

DemDem

Com

1-2

18 19

Boiler

20 21

DHW

Pmp / Vlv

22 23

DHW

DemDem

Com

1-2

Com

3-4

18 19

Boiler

20 21

DHW

Pmp / Vlv

22 23

DHW

DemDem

Com

1-2

Com

3-4

22 23

Com

1-2

Com

3-4

18 19

Boiler

DHW

DemDem

20 21

DHW

Pmp / Vlv

Installation