Watts tekmar 294 - Pump, Valve and Damper Wiring; Boiler Pump;Valve Wiring; Combustion Air Damper Wiring

IOM-T-294 2205 © 2022 tekmar
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Boiler Pump / Valve (Terminals 41 to 48)
Boiler pumps or valves requiring up to 230 V (ac) 5 A, 1/3 hp can be switched through terminals 41
to 46. If a single power source is used for multiple pumps, ensure they are not tied together at any
point between the pumps and the control. For simplicity in wiring and troubleshooting, a separate
breaker for each pump is recommended.
For pumps:
•
Connect the power source line wire (L) to terminal 41.
• Connect a wire from terminal 42 to the pump Line In terminal.
• Connect the pump Neutral (N) to the power source neutral.
• Repeat for additional boiler pumps 2 (terminals 43, 44), boiler pump 3 (45, 46) and boiler pump
4 (terminals 47, 48).
• Ensure each pump is connected to earth ground.
N
G
L
L
NG
Ground
Boiler 1
75 76
Pump/Valve
C
R
R
C
Boiler 1
75 76
Pump/V
alve
For 120 V (ac) valves:
•
Connect the power source line wire (L) to terminal 41.
• Connect a wire from terminal 42 to the valve Line In terminal.
• Connect the valve Neutral (N) to the power source neutral.
• Repeat for additional valves 2 (terminals 43, 44), valve 3 (45, 46) and valve 4 (terminals 47, 48).
• Ensure each pump is connected to earth ground.
Combustion Air (C.A.) Damper (Terminals 49, 50)
A C.A. damper requiring up to 230 V (ac) 5 A, 1/3 hp can be switched through terminals
49 and 50.
For 24 V(ac) actuators:
• Connect the power supply red (R) to terminal 49.
• Connect a wire from terminal 50 to the R on the combustion air damper.
• Connect the C on the combustion air damper to the power source common C.
• For 120 V(ac) actuators:
• Connect the power Line (L) to terminal 49.
• Connect a wire from terminal 50 to the Line on the combustion air damper.
• Connect the neutral (N) on the combustion air damper to the power source common C.
C
R
R
C
Comb
49 50
Air Relay
For 24 V (ac) valves:
• Connect the power source Red wire (R) to terminal 41.
• Connect a wire from terminal 42 to the valve power terminal.
• Connect the valve power common to the power source common (C).
• Repeat for additional boiler valves 2 (terminals 43, 44), boiler valve 3 (45, 46) and boiler valve
4 (terminals 47, 48).
N
G
L
L
NG
Ground
Boiler 1
75 76
Pump/Valve