Full Product Manual

www.usaprocom.com
21200239-01A
OPERATION
1. Follow steps 1 through 7 under Lighting
Instructions, page 19 and 20.
2. With control knob in PILOT position,
strike match, and hold near pilot. Press
in control knob; pilot should light.
3. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
4. Make sure the heater screen is in place
before operating heater.
MANUAL LIGHTING PROCEDURE
THERMOSTATIC CONTROL OPERATION
Models PCNSD18T and PCNSD24TD Only
The thermostatic control used on this model
differs from standard thermostats. Standard
thermostats simply turn the burner on and off.
The thermostat used on this heater senses
the room temperature. At times the room may
exceed the set temperature. If so, the burner
will shut off. The burner will cycle back on
when room temperature drops below the set
temperature. The control knob can be set to
any comfort level.
Note: The thermostat sensing bulb measures
the temperature depending on housing con-
struction.
INSPECTING BURNERS
IMPORTANT: Owner’s should check pilot ame pattern and burner ame pattern often.
Incorrect ame patterns indicate the need for cleaning (see Care and Maintenance,
page 22) or service.
WARNING: Only a qualied service person should service and
repair heater. This includes maintenance requiring replacement or
alteration of components.
PILOT FLAME PATTERN
Figure 26 - Correct Pilot Flame Pattern
(Natural Gas shown)
Figure 27 - Incorrect Pilot Flame Pattern
(Natural Gas shown)
Figure 26 shows a correct pilot ame pattern.
Figure 27 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching
the thermocouple. This will cause the ther-
mocouple to cool, which shuts the heater off.
If pilot ame pattern is incorrect, as shown
in Figure 27
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 20)
• see Troubleshooting pages 24 through 27.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If the burner ame
pattern shows yellow tipping,
follow instructions at bottom of
this page.
Notice: Do not mistake orange ames with
yellow tipping. Dirt or other ne particles enter
the heater and burn causing brief patches of
orange ame.
NG
3-3.5" WC
Natural Gas
Shown
LP
8-11" WC
NG
3-3.5" WC
Natural Gas
Shown
LP
8-11" WC