Utica Boilers MGB Series II/MGC Series 安装指导

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•  Adjust gas input to boiler by removing protective cap on 

pressure regulator

and turning screw clockwise 

 to 

increase input and counterclockwise 

 to decrease 

input. 

•  Manifold pressures are taken at outlet side of gas 

valve. 

•  To check for proper flow of natural gas to boiler, divide 

input rate shown on rating plate by heating value of 

gas obtained from local gas company. This determines 

number of cubic feet of gas required per hour. 

•  With all other gas appliances off, determine flow of gas 

through meter for two minutes and multiply by 30 to 

get hourly rate. 

•  Make minor adjustments to gas input as described 

above. See Figure 16 page 18.

•  Change burner orifices if final manifold pressure 

varies more than plus or minus 0.3 inches water 

column from specified pressure listed on boiler 

rating plate. 

•  Primary air adjustment is not necessary, therefore 

air shutters are not furnished as standard 

equipment. 

CHECK SAFETY CONTROL CIRCUIT.  Test ignition 

system safety shutoff device after placing boiler in 

operation. Figure 15 page 19.

Intermittent Pilot: With main burner operating, turn 

pilot gas adjusting screw clockwise 

 until pilot 

gas is turned off. Within 90 seconds main gas control 

closes, shutting off gas to main burner.

High Limit Control: Remove plastic cover and 

note temperature setting. Refer to appendix A for 

adjustment procedure. Decrease setting to minimum 

and operate boiler. When boiler water temperature 

exceeds control temperature setting, control will open 

circuit, closing automatic main gas valve. Figure 21.

Burner Access 

Door

Gas Valve

High Limit and 

Operating Control