12/30/2020 8
EI916
Electrical Installation
Temperature Sensor
Heated air outlet temperature sensor is included.
Without proper installation of this probe the Make-
Up Air unit will not operate correctly.
The sensor probe/cable is attached to the control board. However, the sensor probe must be installed
external to this unit. Install in the warm air outlet duct, 24” to 36” away from discharge fan.
Control Wiring
Dry Type Switch Contact
This on and off control contact applied across R and W depends upon installation requirements and can
take on several possibilities:
Pressure differential switch
CT with integrated switch contact
Relay across exhaust blower motor
End switch associated with exhaust damper/motor
Connection Details
Connect one side of the field provided switch to the TB1 R
and the other side of the switch to the TB1 W.
External Damper, Field Furnished and Installed
If this installation requires or desires a power damper at the
through-wall hood, this can be field furnished and wired
using the following guidelines:
Required is a 24VAC power to open,
spring
close.
Note: It is assumed the existing power damper will be removed, damper blocked open, or actually used in
parallel with the field added damper.
External damper without end switch:
1.
Locate the two wires connected to the existing damper (violet and gray).
2.
Splice and extend these two wires (powered to open) to the external damper, powered to open.
External damper with end switch:
1.
The external damper motor is driven from the
exhaust
blower turn-on contact closure or device.
2.
Locate the external damper END switch closed when open contact terminals or two wires.
3.
Extend these two wires to the R and W terminal block.
4.
Sequence:
a.
With this arrangement (paragraph 1 above) there is no other turn-on device (current
switch, thermostat, airflow switch, etc.)
b.
When the
exhaust
blower comes on, that same component or mechanism also opens this
external damper.
c.
When the external damper end switch closes it turns on this Make-Up Air unit, at R to W.
d.
All other functions now begin with the R to W turn-on.
