Inspecting Burners - Procom PCNSD18T Manual

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
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.
IMPORTANT: Owner's should check pilot flame pattern and burner flame pattern often.
Incorrect flame patterns indicate the need for cleaning (see Care and Maintenance,
page 22) or service.
WARNING: Only a qualified service person should service and
repair heater. This includes maintenance requiring replacement or
alteration of components.
Figure 25 shows a correct pilot flame pattern.
Figure 26 shows an incorrect pilot flame pat-
tern. The incorrect pilot flame is not touching
the thermocouple. This will cause the ther-
mocouple to cool, which shuts the heater off.
If pilot flame pattern is incorrect, as shown
in Figure 26
• 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 flame
pattern shows yellow tipping,
follow instructions at bottom of
this page.
200239-01C
OPERATION
THERMOSTATIC CONTROL OPERATION
Models PCNSD18T and PCNSD24TD Only
MANUAL LIGHTING PROCEDURE

INSPECTING BURNERS

PILOT FLAME PATTERN
www.usaprocom.com
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.
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.
Notice: Do not mistake orange flames with
yellow tipping. Dirt or other fine particles enter
the heater and burn causing brief patches of
orange flame.
Natural Gas
Shown
NG
3-3.5" WC
Figure 25 - Correct Pilot Flame Pattern
(Natural Gas shown)
Natural Gas
Shown
NG
3-3.5" WC
Figure 26 - Incorrect Pilot Flame Pattern
(Natural Gas shown)
LP
8-11" WC
LP
8-11" WC
21