Utica Boilers UB95M-200 Installationsanweisungen

Check control module fuses before replacing control module 

or any major components (blower, etc.) If one of these 

fuses is blown, it can prevent control module or other 

components from operating.

Turn OFF power to boiler at external line switch.

Remove jacket front panel.

Remove control module cover.

Inspect fuses F1 and F3 (shown below).

Boiler is shipped with four spare fuses attached to 

control module cover.

If necessary, replace open fuse (F1 is 115V, 5-amp 

fast-blow; F3 is 24V, 4-amp slow-blow).

Install control module cover and jacket top front cover 

after fuse inspection.

Restore power to boiler at external line switch and 

verify boiler operation after completing boiler service.

Boiler temperature sensors (outdoor, return water, and 

supply water) are all resistance-type devices.

Table 1 shows correct resistance value for sensor at 

various temperatures.

Use resistance values at 32°F, 60°F, 70°F and 212°F to 

measure sensor resistance at known temperatures (ice 

point, room temperature and sea level boiling point). 

For ice point and boiling point, insert sensor in water 

at that temperature. Use ohm meter to read resistance 

value.

To verify control module is correctly sensing 

temperature, use a resistance decade box. Connect 

decade box temporarily in place of sensor. Use control 

module “Information” mode to read temperature. 

Electric shock hazard! Disconnect power before 

servicing.  All service must be performed by a 

trained, experienced service technician. Never 

jumper (bypass) any device except for momentary 

testing as outlined on the following pages of this 

manual. Failure to follow these instructions WILL 

result in death or serious injury

!  

34,265

37,871

3,698

4,088

27,834

30,764

3,043

3,364

21,630

23,907

2,517

2,782

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18,727

2,091

2,311

13,372

14,780

1,744

1,928

10,629

11,747

1,461

1,615

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9,399

1,229

1,359

6,847

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1,147

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6,129

880

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4,517

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