Utica Boilers UB95M-200 Installationsanweisungen

Tools needed for troubleshooting your boiler:

• Voltmeter that can check 120 VAC, 24 VAC, and 12 

VDC

• Continuity Tester
• Contact Thermometer
• Inclined Manometer or Pressure Gauge with 0-6.0” 

range (0.01” scale) for measuring suction pressures at 

pressure switch

• U-Tube Manometer or Differential Pressure Gauge 

with 0-14” range (0.1” scale) for measuring inlet and 

manifold gas pressures

Prior to troubleshooting:

Verify circuit breaker is ON or fuse is okay at electrical 

panel.

Verify service switch is ON.

Verify 120 VAC (minimum 102 VAC to maximum 132 

VAC) to boiler.

Verify thermostat is calling for heat and contacts 

(including appropriate zone controls) are closed. Check 

for 24 VAC between thermostat wire nuts and ground.

Verify all external limit controls are either installed (and 

closed) or temporarily jumpered for testing.

Verify gas is ON at gas meter, at all appropriate manual 

shutoff valves, and at gas control valve. Gas pressures 

should be maximum of 10” w.c. (natural gas) or 14” 

w.c. (for LP gas) with no flow (lockup) or with boiler on 

and minimum of 5” w.c. with gas flowing (verify during 

boiler startup with boiler at high fire).

Verify wire connectors at boiler control and at 

originating control are securely plugged in or 

connected.

Verify all hoses are securely connected and are not 

plugged in or damaged.

Fire, Explosion, Shock Hazard.  Revision, 

modification, substitution or elimination of factory 

equipped, supplied or specified components could 

result in death or serious injury. 

  

• If any component does not function properly, make 

sure it is correctly installed and wired before replacing 

it.

• Static electricity discharge can damage the integrated 

modulating boiler control (IMBC). Touch metal surface 

to discharge static electricity before touching control.

• Boiler control cannot be repaired. If it malfunctions it 

must be replaced.

• Only trained, experienced service technicians should 

service boiler control systems. 

• After troubleshooting, follow “Detailed Sequence of 

Operation” Section 7 page 12, for normal light off 

procedure.

• All controls are factory tested,a defective control is 

generally least likely cause. If you suspect you have a 

defective boiler control, read  “Troubleshooting” Section 

9 before you replace it.

• It is unlikely that two consecutive controls are 

defective. Chances are that either there is nothing 

wrong with the control or it is damaged by some other 

problem (for example, an electrical short burning out a 

transformer).