Shut Down Procedures - CHIEF Goldwell CH1015T-NGE/NGEM Installation And Operation Manual

Set the thermostat control to the desired temperature setting. Initially, set the firing rate of the heater at
2 psig (14kPa) pressure for propane, or 1 psig (7kPa) pressure for natural gas. To obtain even drying,
adjust the firing rate of the heater unit so that the thermostat calls for heat 90% of the time. The heater
firing rate must be checked as temperature conditions change.
Warning: The plenum thermostat is used as a drying thermostat, not as a plenum high limit
Humidistat - Thermostat Control Adjustment
1. Humidistat Control Only
Set the thermostat at the lower temperature limit. This is the temperature wanted for heater operation,
whether the humidistat is calling for heat or not, 40°F-50°F (4.4°C-10°C) is recommended. Set the
humidistat and heater according to the humidistat instructions previously given.
2. Thermostat Control Only
Set the humidistat at 100% relative humidity. Then adjust the thermostat and heater controls according
to the thermostat instructions given.
3. Humidistat - Thermostat Combination
Set the humidistat and thermostat at the desired operating conditions. Then adjust the firing rate of the
heater according to the humidistat and thermostat instructions.
Modulating Valve Adjustment (Heater Operation)
The modulating valve is used to maintain a constant plenum temperature by allowing more gas to flow
to the burner if the plenum temperature is lower than desired, or by restricting the gas flow if the
temperature is higher than desired.
To set the modulating valve, use the following procedures:
1. Determine what plenum temperature is desired.
2. Using the vapor valve, set the operating pressure at 8 psig (55kPa) for propane, or 3 psig
(21kPa) for natural gas.
3. Adjust the "T" Handle of the valve until the bin thermometer maintains the desired plenum
temperature. The handle is turned in, (clockwise) to get a higher temperature, or out (counter-
clockwise) to get a lower temperature.
4. Set the regulator 2 psig (14kPa) higher than the modulating valve operating condition, by
turning the modulating valve handle in (clockwise) 2 revolutions, adjusting the regulator to the
desired pressure, and then resetting the modulating valve to the desired plenum temperature

Shut Down Procedures

If the heater is to be shut off for a prolonged period, carry out the following steps:
Chief Industries, Inc. 800-359-7600 OPERATION - 416274
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