8
IOM-T-294EXP
2214
© 2022 tekmar
Boiler Pump / Valve (Terminals 20 to 27)
Boiler pumps or valves requiring up to
230 V (ac) 5 A, 1/3 hp
can be switched through terminals 20
to 27 . 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 20 .
• Connect a wire from terminal 21 to the pump Line In terminal .
• Connect the pump Neutral (N) to the power source neutral .
• Repeat for additional boiler pumps 6 (terminals 22, 23), boiler pump 7 (24, 25) and boiler pump
8 (terminals 26, 27) .
• Ensure each pump is connected to earth ground .
N
G
L
L
N
G
Ground
Boiler 1
20 21
Pump/Valve
C
R
R
C
Boiler 1
20 21
Pump/Valve
For 120 V (ac) valves:
• Connect the power source line wire (L) to terminal 20 .
• Connect a wire from terminal 21 to the valve Line In terminal .
• Connect the valve Neutral (N) to the power source neutral .
• Repeat for additional valves 6 (terminals 22, 23), valve 7 (24, 25) and valve 8 (terminals 26, 27) .
• Ensure each pump is connected to earth ground .
For 24 V (ac) valves:
• Connect the power source Red wire (R) to terminal 20 .
• Connect a wire from terminal 21 to the valve power terminal .
• Connect the valve power common to the power source common (C) .
• Repeat for additional boiler valves 6 (terminals 22, 23), boiler valve 7 (24, 25) and boiler valve
8 (terminals 26, 27) .
N
G
L
L
N
G
Ground
Boiler 1
20 21
Pump/Valve
Provide a 15 Amp circuit for the input power .
• Connect the 115 V (ac) line wire (L) to terminal 28 .
• Connect the neutral wire (N) to terminal 29 .
Input Power (Terminals 28, 29)
N
L
Power In
L
N
28 29
