Utica Boilers UB95M-200 Instruccion De Instalación

• High limit control is mounted in ½” NPT control well 

and ¾” X ½” bushing on top of front boiler section at 

hot water outlet. 

• High limit control is tied in with boiler control and is 

factory set at 180°F (82°C) water temperature. 

• High limit setpoint is field adjustable and may be set 

anywhere between 100°F (38°C) and 180°F (82°C), 

with maximum high limit setpoint not exceeding 180°F 

(82°C). Field high limit setpoint adjustment for each 

installation depends on heating system requirements. 

• High limit control automatically resets when boiler water 

temperature decreases below high limit setpoint value 

by differential setpoint value. Adjustable differential from 

5°F (3°C) to 30°F (17°C).

• Boiler operating temperature (temperature curve) is 

calculated and set in boiler control parameters.

• Casting temperature safety switch, 230°F (110°C)

setpoint, shuts off power to boiler control in event of 

boiler lack of or loss of water. 

• Casting temperature safety switch is installed on top of 

aluminum boiler section behind supply piping. 

• Failure code is displayed on digital readout. Fault 

requires manual reset of casting temperature safety 

switch to restart boiler. Press reset on user interface 

panel also. 

• Verify boiler is properly filled with water and no air is 

trapped in top of casting (check cap on Cam Vent at 

heat exchanger) before resetting. 

Burn and scald hazard.  Never run cold water into a 

hot, empty boiler. Failure to follow these instructions 

could result in death or serious injury

     

• Circulating pump moves water through closed loop 

supply and return piping systems, terminal heating 

equipment (finned tube radiators, etc.) and back 

through boiler for reheating. 

• Properly size circulator pump to overcome frictional 

losses (usually measured in feet of water, also referred 

to as “pump head loss”) of supply and return piping 

systems and boiler to provide required hot water flow 

rates. 

• Circulator pump is furnished in carton within boiler 

cabinet. 

• Locate circulator(s) on downstream (“pumping away”) 

side of expansion tank.

Blocked vent safety assembly incorporates two pressure 

switches designed to discontinue operation of boiler if there 

is a problem with blower or venting system. 
The normally open switch closes upon initiation of blower 

and functions as air proving switch. 
The normally closed switch opens if there is a blockage in 

combustion air intake or exhaust vent pipes.

Manual drain valve drains water in heating system, 

including boiler, hot water supply and return piping systems 

installed above drain valve. 
Drain valve is installed in return piping at bottom front of 

boiler section. Any piping installed below elevation of drain 

valve requires additional drain valves to be installed at low 

points in piping system in order to drain entire system.

Burn and scald hazard.  Safety relief valve could       

discharge steam or hot water during operation.       

Install discharge piping per these instructions.

     

• Each boiler must have a properly sized and installed 

American Society of Mechanical Engineers (ASME) rated 

safety relief valve. 

• Furnished  safety relief valve automatically opens at 30 

psig pressure to relieve strain on boiler and heating 

system from increasing pressure. 

• Pipe Safety relief valve discharge with same size pipe 

as valve discharge opening to open drain, tub or sink, 

or other suitable drainage point not subject to freezing. 

For installations where there is no floor drain or other 

appropriate drainage receptacle available to receive 

condensate from boiler, external float activated condensate 

pump with integral sump is required. Condensate pump can 

be piped to remote tie in point to sanitary sewer system. 

For this application, boiler must be installed so that proper 

pitch of piping to external condensate reservoir (sump) can 

be accomplished. Use wood frame or concrete blocks to 

raise boiler as required for proper installation.

Optional concentric vent/air intake termination utilizes 

single opening per each appliance through wall or roof of 

structure.