Install Instructions

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© 2019 tekmar 671
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D - 08/19
Wiring to a Single-Stage Boiler -------------------------------------------------------------------------
A single-stage boiler is enabled through the T-T contacts.
• Connect Boiler terminals 11 and 12 to the boiler T-T contacts.
Stage 1
TT
Boiler
11 12
WR
Provide a 15 A circuit for the input power.
• Connect the 115 V (ac) line wire (L) to terminal 17.
• Connect the neutral wire (N) to terminal 18.
N
L
Power
17
L
18
N
Wiring the Input Power ---------------------------------------------------------------------------------
If the heat relay is operating a pump:
The pump can be rated up to 230 V (ac), 5 A, 1/3 hp and switched through
terminals 13 and 14. For simplicity in wiring and troubleshooting, a separate
breaker for each pump is recommended.
• Connect the power source line wire (L) to terminal 14.
• Connect a wire from terminal 13 to the pump L.
• Connect a wire from the pump N back to the power source neutral.
• Connect the ground wire (G) to the pump.
If the heat relay is wired to an electrical contactor:
• Connect a wire from terminal 13 to the electrical contactor R.
• Connect a wire from terminal 14 to the electrical contactor C.
Wiring the Heat Relay ----------------------------------------------------------------------------------
A system pump requiring up to 230 V (ac), 5 A, 1/3 hp can be switched through
terminals 15 and 16. For simplicity in wiring and troubleshooting, a separate
breaker for each pump is recommended.
• Connect the power source line wire (L) to terminal 16.
• Connect a wire from terminal 15 to the pump L.
• Connect a wire from the pump N back to the power source neutral.
• Connect the ground wire (G) to the pump.
Wiring the System Pump -------------------------------------------------------------------------------
L
N
G
L
NG
Heat
Relay
13
14
Heat
Relay
13
14
L
N
G
L
NG
System
Pump
1615
Equipment Wiring
R
C
RC
Heat
Relay
13
14
If the heat relay is wired to a 24 V(ac) on-off valve:
• Connect the power source red wire (R) to terminal 13.
• Connect a wire from terminal 14 to the valve R.
• Connect a wire from the valve C to the power source common.