tekmar 370 House Control User Manual
Page 12
Copyright © D 370 -06/99
12 of 20
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
1
Zo
In
13
15
Boil
Sen
RTU
2
7
RTU
3
9
RTU
4
10
8
Com
Sen
UnO
Sw
12
11
Com
Sen
Com
Sen
14
Sup
Sen
16
Out
Sen
17
Com
Sen
5 6
RTU
1
Zo
In
13
Sup
Sen
Com
Sen
14
16
Out
Sen
15
17
Boil
Sen
RTU
2
7
RTU
3
9
RTU
4
10
8
Com
Sen
UnO
Sw
12
11
Com
Sen
Com
Sen
5 6
RTU
1
Zo
In
13
Out
Sen
15
17
Boil
Sen
RTU
2
7
RTU
3
9
RTU
4
10
8
Com
Sen
UnO
Sw
12
11
Com
Sen
Com
Sen
14
Sup
Sen
16
Com
Sen
5 6
RTU
1
Zo
In
13
Sup
Sen
Com
Sen
14
16
Out
Sen
15
17
Boil
Sen
RTU
2
7
RTU
3
9
RTU
4
10
8
Com
Sen
UnO
Sw
12
11
Com
Sen
Com
Sen
5 6
RTU
1
Sup
Sen
Com
Sen
14
16
Out
Sen
15
17
Boil
Sen
RTU
2
7
RTU
3
9
RTU
4
10
8
Com
Sen
UnO
Sw
12
11
Com
Sen
Zo
In
13
28
3
Com
3-4
27
4
29
18 19
Boiler
20 21
DHW
Pmp / Vlv
22 23
DHW
DemDem
1
25
2
26
24
Com
1-2
2
26
28
3
Com
3-4
27
4
29
18 19
Boiler
20 21
DHW
Pmp / Vlv
22 23
DHW
DemDem
1
25
24
Com
1-2
2
26
28
3
Com
3-4
27
4
29
18 19
Boiler
20 21
DHW
Pmp / Vlv
22 23
DHW
DemDem
1
25
24
Com
1-2
18 19
Boiler
20 21
DHW
Pmp / Vlv
22 23
DHW
DemDem
1
25
2
26
24
Com
1-2
28
3
Com
3-4
27
4
29
4
29
18 19
Boiler
20 21
DHW
Pmp / Vlv
22 23
DHW
DemDem
1
25
2
26
24
Com
1-2
28
3
Com
3-4
27
2
26
28
3
22 23
1
25
24
Com
1-2
Com
3-4
27
4
29
18 19
Boiler
DHW
DemDem
20 21
DHW
Pmp / Vlv
Installation