ECR Dunkirk PVWB Series, Manual

Page: 19 / 28

19
OPERATING YOUR BOILER
FIG. 14 - LIGHTING PILOT
FIG. 15 -VR8200A/VR8300A AUTOMATIC GAS VALVE
FIG. 16 -VR8204A/VR8304M AUTOMATIC GAS VALVE
FIG. 17
OPERATING YOUR BOILER
ADJUST PILOT BURNER
Pilot fl ame should surround 3/8” to 1/2” of the pilot
sensor. Refer to Fig. 18. If fl ame needs adjusting, do
it as follows:
1. Remove screw cover over pilot adjusting screw.
2. Insert small screwdriver and adjust fl ame as needed.
Turn screw counterclockwise to increase flame,
clockwise to decrease.
3. Replace screw cover over pilot adjusting screw.
MAIN BURNER(S)
The main burners do not require primary air adjustment
and are not equipped with primary air shutters. Main
burner fl ames should form sharp blue inner cones in
a softer blue outer mantel, with no yellow. Puffs of air
from blowing on the fl ame or stamping on the fl oor will
cause the fl ames to turn orange momentarily. This is not
unusual. Remain still when observing the main burner
fl ames. If the fl ame appearance is not correct, check
main burner orifi ces and the burner throat and fl ame
ports for dust and lint obstruction. It may be necessary
to remove the rollout shield to observe the main burner
fl ames. Replace rollout shield after observation. Refer
to Figure 17.
ADJUST LIMIT CONTROLS
Instructions for each control are included with the
controls. These settings can be changed after you
have had some idea how the system works. Example:
If your system does not give quite enough heat in very
cold weather, you can raise the limit setting to 220° F
Use the boiler gauge to check your settings. Make the
adjustments according to its readings.
RECOMMENDED BOILER WATER
TEMPERATURES
Type of Heating Unit Limit Control Setting
Standing Radiators...............................180º F.
Baseboard and Convector Radiators.....200º F.
Check thermostat operation. When set above
temperature indicated on the thermometer, boiler
should ignite. Make certain the thermostat turns off
the boiler when room temperature reaches the selected
setting and starts the boiler operating when room
temperature falls a few degrees.
After setting limit control to limit setting, check to see
if it shuts off the gas supply to the burners. Turn your
thermostat up to call for heat and let your boiler run
until the temperature of the water reaches the limit
setting. The gas valve should shut off and the circulator
keep running until the thermostat is satisfi ed, or the
water cools enough to restart the burners through the
limit control.
Finally, set the thermostat
for the desired temperature.
Special conditions in your
home and the location of the
thermostat will govern this
setting.
FIG. 18
OFF
ON
INLET
GAS CONTROL KNOB
PILOT ADJUSTMENT
(UNDER CAP SCREW)
PILOT
OUTLET
OUTLET
WIRING
TERMINALS (2)
INLET
PRESSURE
TAP
TERMINAL
(2)
GROUND
PRESSUR
TAP
PRESSURE REGULATOR ADJUSTMENT
(UNDER CAP SCREW)
OUTLET