Greenheck Digital Temperature Interlock (474750 IOM) (Pre November 2012) - Manual (Page 7)

7 Digital Temperature Interlock
®
Operation
1. Turn fans on and off using the fan switch. It is
normal for the fans to remain running after the
switch is turned off. The exhaust duct temperature
controller will open after heat is no longer present
under the hood and the temperature is below the
set point plus hysteresis, the fans shall shut down.
2. In the event that the cooking equipment is started
without turning the fans on manually, the fans will
turn on automatically and remain running with
the presence of heat under the hood. Once the
temperature is below the set point plus hysteresis,
the fans shall shut down.
Testing
1. Turn fan switch on, then off to ensure proper fan
operation before cooking equipment is started.
Once this is verified, testing can proceed.
2. Heat up cooking equipment with fans off. Once
the duct temperature reaches the set point of the
temperature controller the fans will start within
5 minutes. If the fans take more than 5 minutes
to start, decrease the temperature set point
by adjusting the set point on the temperature
controller (see Calibration).
3. If an adjustment was made in Step 2, repeat now.
4. After verification of fan start-up, shut down
cooking equipment. The fan switch should still be
in the off position. Once cooking equipment has
cooled below the set point plus hysteresis, the
fans will shut down.
NOTE
During testing, if fans do not start automatically in
the first 10 minutes of cooking equipment activation,
manually start fans to avoid accidental fire system
dump due to heat build-up.
Troubleshooting
Fans do not turn on automatically upon cooking
equipment activation.
• Check wiring to control panel or relay box
• Multiple sensors must be wired separately
• Temperature set point too high, decrease set
point
• No power to fans, check breakers/starters/relays
Fans do not shut off.
• Switch must be in the off position
• Cooking equipment hot, wait for it to cool
• Temperature set point too low, increase set point
• Ensure wires connected to appropriate control
circuit
Fans cycle off to on when turned off.
• Cooking equipment not cooled enough, retry in
5 minutes
Fans do not turn on quick enough.
• Decrease temperature set point
Maintenance
Daily
Clean the temperature sensor with cloth and
degreaser. Keep clean for best performance.
Weekly
Dependant on grease production and grease filter
type, clean temperature sensor.
Seasonal
May have to change temperature setting on the
temperature controller if ambient kitchen temperatures
fluctuate between summer and winter seasons.
Whom to call
Contact your local Greenheck representative.
What to have ready for the call
Sales order, serial number and description of product.
Sales Order Number _______________________
Serial Number _____________________________