Greenheck Temperature Interlock (471738) - Manual (Page 4)

4 Temperature Interlock
Calibration
Thermostat is preset by factory to 95°F and has a
slow make and break contact. It will make contact on
a temperature rise and break contact on temperature
fall. The temperature set point may have to be adjusted
slightly depending of both ambient and cooking
conditions. The adjustment knob is located on the back
of the thermostat. Use a small blade screwdriver to
make the adjustments.
1. Turn counterclockwise to increase the temperature
set point, turn clockwise to decrease the
temperature set point.
2. Quarter revolution in either direction corresponds
to a 22.5°F adjustment. Be sure to make small
adjustments, about 1/16 of a turn (≈6°F) or less at
one time.
3. Do not exceed more than one-half revolution in either
direction.
4. Check system operation before making additional
adjustments.
Electrical Connections
Thermostat Connections
1. Run two 14 awg 90°C minimum conductors from
each temperature sensor to the appropriate electrical
circuit connections. (See Step 3 for connection
options).
2. In junction box, connect leads on thermostat to the
14 awg conductors using appropriate size
wire nuts.
• Wires are interchangeable with one another.
• Wire thermostats in parallel if there are multiple
thermostats utilized.
3. The thermostat(s) wires will land on terminals T1-A
and T1-B
CAUTION
Do not connect temperature sensor in series with
each other, nor in series with fan power. This can
permanently damage the sensors. On/off cycling
of the fans will result during start-up and shutdown
periods. Use the thermostat for control wiring only.
Switch Connections to Control Box or Fan Control
Center
1. Connect a Single Pole Single Throw (SPST) switch
to terminals S1H and S1. This is the same whether
temperature interlock is in a separate control box or
integrated with a kitchen fan control center.
Circuit Connections
1. Standard Interlock Control
• 120VAC, 10 or 15 amp circuit to terminals H1
and N1
• 120VAC, 24VAC or other control circuit for fan
starter activation (factory separated from main
power connection shown in previous bullet)
- Control circuit power to terminal CP1
- Terminal CP2 to fan starter coils (hot)
2. Kitchen Fan Control Center Integration (KFCC)
• 120VAC, 15 amp circuit to H1 and N1 in fan
control center
- No additional control circuits are required
- Fan starters are factory-wired
®