Utica Gas-fired Boiler - Manual (Page 21)

PAGE 20
CHECK SAFETY CONTROL CIRCUIT, after burner adjustments are made, for satisfactory
operation.
1. Pilot: With main burner operating, turn the pilot gas adjusting screw clockwise
until pilot gas is turned off. See figures 14, 15, & 16 on pages 14 & 15. Within 90 seconds
the main gas control should close, shutting off the gas to the main burner.
2. High limit control (figure 22 on page 19). Remove cover and note temperature setting.
Decrease this setting to minimum and operate boiler. When the boiler water temperature
exceeds the control temperature setting, the control will open the circuit, closing the
automatic main gas valve.
ITEM PART
NO. NO. DESCRIPTION OTY.
1 3262001 TEMP. SENSOR BRACKET 1
2 AQ02101 CONTROL-FIXED TEMPERATURE 1
THERMO (ROLLOUT SWITCH)
3 HW06501 SCREW - #6 X1/4 HEX HD 2
THE ROLLOUT SWITCH IS LOCATED ON THE BASE AND FLUE COLLECTOR
NOTE: THE QUANTITIES ABOVE ARE FOR EACH SWITCH.
FIGURE 23
MGB SERIES REPLA MGB SERIES REPLA MGB SERIES REPLA MGB SERIES REPLA MGB SERIES REPLACEMENT P CEMENT P CEMENT P CEMENT P CEMENT PAR AR AR AR ARTS TS TS TS TS
R R R R ROLL OLL OLL OLL OLLOUT & SPILL SWIT OUT & SPILL SWIT OUT & SPILL SWIT OUT & SPILL SWIT OUT & SPILL SWITCH CH CH CH CH