Utica Boilers UB95M-200 Installationsanweisungen

Refer to Repair Parts Manual for illustrations, and Control 

Manual and Troubleshooting Guide for detailed sequence of 

operation and troubleshooting guide.

• Monoblock design cast aluminum heat exchanger 

eliminates need for mating sections eliminates leaks 

between sections. 

• Cast aluminum has better heat transfer properties 

which leads to higher efficiency and cooler exhaust 

temperatures. 

• Cooler exhaust temperatures create condensation of 

flue gas, which would cause corrosion in traditional cast 

iron heat exchangers.

Main power switch is located on the display panel. Main power 

switch is illuminated when receiving power and in ON position.

Integrated modulating control senses load necessary 

to heat structure and therefore uses less fuel than 

conventional fixed firing rate boiler when there is lower 

than peak demand for heat.
Control senses supply water, return water, and outside 

air temperatures. If outside air sensor is connected and 

calculates load on system it adjusts firing rate to deliver 

amount of heat needed at that particular time.

NTC sensors measure supply water, return water, and 

outside air temperature. Configured to operate with 

modulating boiler control.

• Modulating blower provides introduction of gas/air 

mixture through burner and into combustion chamber 

then out  exhaust vent where combustion products are 

discharged to outdoors. 

• Blower is designed to communicate with modulating 

control to run at variable speeds dependent on heating 

system heat load. 

• Variable speeds create pressures felt by gas valve and 

gas/air mixer that dictate how much fuel is introduced 
to combustion process.

• Boiler gas controls have been developed for domestic 

heating appliances with premix burners and automatic 

direct burner ignition and are suitable for natural and 

LP gas. 

• Gas controls perform all functions required to safely 

regulate gas flow to main burner of boiler. 

• Gas valve is directly connected to gas/air mixer.

Venturi design of gas/air ensures correct mixture of air and 
gas.

Burner is designed to operate over full range of input. 

Burner can operate under normal (blue flame) and infrared 
conditions.

Boiler uses DSI to ignite fuel/air mixture in combustion 

chamber and sense flame during operation. DSI is durable, 

reliable, and resists breakage.

• Installed integral low water cut off (LWCO) must be 

manually reset if there is a low water condition. 

• LWCO senses water through probe at boiler top that 

sends signal through water to ground. If the signal is 

not sensed LWCO enters lockout mode that disables 

boiler. 

• LWCO in normal mode illuminates red indicator light on 

LWCO panel in boiler. 

• During low water condition, red light goes out and 

LWCO and control reset buttons on display panel must 

be pressed to reset LWCO.

• Round button switch located next to digital display is 

normally closed and spring loaded, when depressed will 

open, when pressure is removed closes. 

• Switch is used as manual reset for LWCO. LWCO will 

remain in lockout when tripped until water level reaches 

probe and switch is pressed to open state and then 

released to closed state, which sends signal to LWCO to 

resume normal operation. 

• Boiler control reset button must then be pressed to 

reset from low water condition. LWCO switch and 

control reset button are located on boiler panel display.

• High limit control is safety limit control provides 

protection for boiler and heating system from unsafe 

operating conditions which could damage the boiler.