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059705–00 REV. B
12
WIRING
System Pump
or Pump Starter
L
L
N
N
WIRING THE SYSTEM PUMP (OUTPUT)
(TERMINALS 4, 5)
HOT WATER APPLICATIONS
•
The SYSTEM PUMP output relay will energize whenever the outdoor temperature is below the
Outdoor start.
•
The SYSTEM PUMP will remain constantly energized while the outdoor temperature is below the
Outdoor start.
•
When the outdoor temperature rises 2°F above the Outdoor start, the SYSTEM PUMP output
will remain energized for the period set by the Run-On.
•
The SYSTEM PUMP output has one normally OPEN (N.O) relay contact rated for a 1/8HP pump.
•
The N.O. contacts are dry contacts only. They do not source any voltage.
•
Class 1 voltages must enter the enclosure through a different opening from any Class 2
voltage wiring.
•
The System Pump N.O. contact is capable of switching 3 A resistive at 120VAC.
STEAM APPLICATIONS
•
The Genesis Heat-Timer
®
is equipped with a System output to operate additional equipment.
The most common use for this output is operating a combustion air-damper.
•
The SYSTEM PUMP (Output) terminals are 4 and 5. These terminals do not source any power.
Wire these terminals directly to the combustion air-damper activation terminals.
•
The contacts can switch a 6A resistive at 120VAC load.
•
A good practice is to use an external relay contact (by others) wired in series with the burner
ENABLE terminals 6 and 7 with the relay coil wired in series to the combustion air-damper
End Switch. This will prevent the Genesis Heat-Timer
®
from activating the boiler before fully
opening the damper. For additional assistance on this wiring, contact Heat-Timer's technical
support department.
•
The System Pump (Output) relay remains energized for the System Run-On period
before de-energizing.
