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1. Slightly press in plaque control knob on right side of heater and turn
counterclockwise
C-clockwise
to the desired position.
IMPORTANT:
Release downward pressure while turning control knob.
Control knob will lock at the desired position.
2. Turn thermostat control knob on left side of heater to any setting between
LO and HI.
Note:
When burners cycle on, or from LO to HI, a “click” will
be heard. When the burners light, a “whoosh” noise will be heard.
Figure 17 - Pilot
TO SELECT HEATING LEVEL
WARNING ICON G 001
WARNING
When running heater, set control knob at the 1, 2, 3, or 4
locked positions. Never set control knob between locked
positions. Poor combustion and higher levels of carbon
monoxide may result.
WARNING ICON G 001
CAUTION
Do not try to adjust heating levels by using the manual shutoff
valve.
Control
Knob VN1800IT VN2550IT
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
OPERATING
HEATER
Models VN1800IT
and VN2550IT
Continued
Continued
Figure 18 - Burner Patterns
Pilot Burner
Thermocouple
Ignitor Electrode