Checking And Adjusting - UTICA BOILERS UHSW Series Installation, Operation & Maintenance Manual

Gas Valve Safety Shutdown Test
!
WARNING
Electrical shock hazard. Follow instructions to turn
off electric power. Failure to do so could result in
death or serious injury.
Ignition system safety shutoff device must be tested after
placing boiler in operation.
With main burners firing, disconnect ignition cable from
intermittent pilot control box. Gas valve should shut off
main burners. TURN OFF ELECTRIC POWER to boiler before
reconnecting ignition cable, to prevent electric shock.
Adjust Pilot Burner
1.
Remove screw cover over pilot adjusting screw.
2.
Insert small screwdriver and adjust flame as needed
See Figure 14 & 15. Turn screw counterclockwise
to increase flame, clockwise to decrease.
Replace screw cover over pilot adjusting screw.
Main Burner(S)
Main burners do not require primary air adjustment and are
not equipped with primary air shutters.
Main burner flames form sharp blue inner cones in softer
blue outer mantel, with no yellow. Puffs of air from blowing
on flame or stamping on floor will cause flames to turn
orange momentarily. This is not unusual. Remain still when
observing main burner flames. See Figure 16, Page 27.
If flame appearance is not correct, check main burner
orifices, burner throat and flame ports for dust and lint
obstruction. It may be necessary to remove rollout shield
to observe main burner flames. Replace rollout shield after
observation.
Adjust Limit Controls
Instructions for each control are included with the controls.
Recommended Boiler Water Temperatures
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 limit
setting to 190°F.

CHECKING AND ADJUSTING

Figure 14 - Automatic Gas Valve
Figure 15
3/8" to
1/2" in
Flame
26
- Pilot Flame Adjustment
Ignition Electrode
PN 240012689 Rev. A [05/15/2019]