Utica Boilers UB95M-200 Installationsanweisungen

DHW heating: Target temperature is determined by 

adding Parameter 1 to Parameter 33 (default 150°F 

and 30°F). Do not change Parameter 1 from factory 

default setting of 150°F unless application is specially 

engineered for other temperature. DHW heating default 

setting is 180°F.

High limit operation: If outlet water temperature 

exceeds target temperature (or 180°F, whichever is 

lower), high limit action occurs. Control module shuts 

burner off showing “b 9” followed by “26” on display.

DHW operation (if used): Boiler is factory set to 

change target outlet water temperature to 180°F on 

call for heat from DHW aquastat.

Additional Thermal Overrun Protection: High 

limit operation shuts down burner when outlet 

water temperature exceeds target temperature.                  

Adverse conditions could cause water temperature 

to rise too quickly and overshoot this temperature. 

Control’s advanced technology provides protection in 

event of thermal overrun. Using its electronics, control 

provides two additional levels of overrun protection:

• Level 1: Indication occurs if supply water temperature 

reached 183°F.  Control displays soft lockout code (“b 

9” followed by “18” if on supply or “19” if on return). 

Control will not operate burner again until water 

temperature dropped 9°F below target temperature.

• Level 2: Lockout occurs if supply water temperature 

reaches 200°F or if return water reaches 193°F. Control 

will enter hard lockout and display error code (“E” 

followed by “18” if on supply or “19” if on return).

Hard lockout requires manually pressing display panel 

reset button to restart operation. Service technician 

must troubleshoot cause of problem and correct it 

before placing boiler back in operation.

Boiler is factory equipped with manual reset probe type 

low water cutoff. 

Boiler control uses temperatures sensed at both supply 

and return areas of heat exchanger. If flow rate is 

too low (temperature difference too high) or either 

temperature is too high, control shuts boiler down. 

Ensures boiler shutdown in event of low water or low 

flow conditions.

Do not install boiler in room likely to freeze.

Following boiler control feature provides some protection for boiler 

only, not for the system. 

Boiler is controlled by microprocessor electronic control that 

senses: 

• Outlet water temperature, 

• Return water temperature,

• Outdoor temperature (when factory supplied, field 

installed outdoor sensor is installed).

Information sensed plus input from external limit and 

operating controls is used to regulate boiler on/off 

operation and will modulate boiler firing rate to more 

closely match output to demand.

Boilers require 120 VAC/60 HZ power supply and are not 

polarity sensitive.

Supply voltage

120 Vac/60 hz

Electrical demand

10 VA

Pre-purge timing

10 Seconds

Post-purge timing

15 Seconds 

Min. off time, space heating

10.2 Seconds

Pump on after space htg.

0 Minutes

Min. off time, DHW

10.2 Seconds

Pump on after DHW

30.6 Seconds

Line voltage fuse, F1

5 Amp fast-blow

Low voltage fuse, F3

4 Amp slow-blow

• Circulator has sufficient head to handle boiler pressure 

drop plus reasonable pressure drop in connecting 

piping. See the Installation, Operation and Maintenance 

Manual for piping information.

• Boiler control’s internal relay contact is suitable for 

handling only the boiler circulator provided. 

• Do not wire additional pumps in parallel with boiler 

circulator.  

• To operate system circulator when boiler circulator is 

running, see “Electrical Wiring” section in Installation, 

Operation and Maintenance Manual for wiring required.

Operating temperature (target): Control senses outlet water 

temperature and regulates boiler firing rate to achieve 

target temperature set by installer using Parameter 4. 
Temperature can be set between 120°F and 194°F.

Space heating: Target temperature is fixed (equal 

to Parameter 4) when outdoor reset is not installed 

or calculated as described under “Outdoor Reset 

Operation”  page 5, when outdoor sensor is connected.

Exception: See explanation of “Supply Temperature 

Boost” page 5.