ECR UTICA BOILERS UB95M-200, Installation, Operation & Maintenance Manual

air proving blocked vent safety assembly

The air proving blocked vent safety assembly incorporates two 

pressure switches that are designed to discontinue operation of the 

appliance if there is a problem with the blower or venting system. 

The normally open switch closes upon the initiation of the blower 

and functions as an air proving switch. The normally closed switch 

opens if there is a blockage in the combustion air intake or exhaust 

vent pipes.

drain valve

The manual drain valve provides a means of draining the water in 

the heating system, including the boiler and hot water supply and 

return piping systems installed above the drain valve. This drain 

valve is installed in the return piping at the bottom front of the boiler 

section. Any piping installed below the elevation of this drain valve 

will require additional drain valves to be installed at low points in 

the piping systems in order to drain the entire system.

Xi - controls and accessories

!

WARNING

Never run cold water into a hot, empty boiler.

circulator pump

Every forced hot water system requires at least one circulating pump. 

The circulating pump imparts the necessary energy to move water 

through the closed loop supply and return piping systems, terminal 

heating equipment (finned tube radiators, etc.) and back through the 

boiler for reheating. To provide the required hot water flow rates, the 

circulator pump must be properly sized to overcome frictional losses 

(usually measured in feet of water, also referred to as “pump head 

loss”) of the supply and return piping systems and boiler. The cir-

culator pump is furnished in a carton within the boiler cabinet. The 

circulator(s) should always be located on the downstream (“pumping 

away”) side of the expansion tank.

asme rated pressure relief valve

Each boiler must have a properly sized and installed American 

Society of Mechanical Engineers (ASME) rated pressure relief valve. 

Water expands as it is heated by the burner/boiler sections. If there 

is no place for the water to expand its volume,  (i.e., a properly sized 

and properly functioning expansion tank) pressure on the inside 

of the boiler and heating system will increase. The furnished relief 

valve will automatically open at 30 psig pressure to relieve the strain 

on the boiler and heating system from the increasing pressure. The 

pressure relief valve discharge must be piped with the same size pipe 

as the valve discharge opening to an open drain, tub or sink, or other 

suitable drainage point not subject to freezing, in accordance with 

ASME specifications. Failure to provide the pressure relief valve with 

piping as herein described may cause water damage and/or serious 

bodily injury. The boiler manufacturer is not responsible for any 

water damage or personal injury. Check local codes for maximum 

discharge height from floor.

external condensate pump (optional)

For installations where there is no floor drain or other appropriate 

drainage receptacle available to receive condensate from the boiler, 

an external float activated condensate pump with integral sump 

is required. The condensate pump can be piped  to a remote tie in 

point to a sanitary sewer system. For this application, the boiler must 

be installed so that proper pitch of piping to the external condensate 

reservoir (sump) can be accomplished. Use wood frame or concrete 

blocks to raise boiler as required for proper installation.

concentric vent/air intake termination (optional)

The optional concentric vent/air intake termination utilizes a single 

opening per each appliance through the wall or roof of a structure.

Xii -  water treatment & freeze protection

When filling the boiler water is the preferred heating solution.  Most 

potable water supplies may be used to charge and re-fill provided the 

chlorine and chloride ions levels are less than 100 ppm.  
Antifreeze may be used in most applications provided all of the fol-

lowing conditions are met:

Unless a strict schedule of sampling, analysis and maintenance 

1. 

of the antifreeze solution is followed, the boiler must be piped 

as a primary loop connected to secondary loop as shown in the 

Piping & Wiring Diagram Appendix. Failure to perform regular 

maintenance to the antifreeze manufacturer’s instructions will 

result in damage to the heat exchanger and the voiding of boiler 

warranty.
Only the antifreeze manufacturers listed below are selected.

2. 

 At installation of a new or replacement boiler and at least on 

3. 

an annual basis the system antifreeze must be analyzed by the 

antifreeze supplier or their recommended laboratory.
Adjustments to the system antifreeze must be made according 

4. 

to the antifreeze manufacturers recommendations using only 

their recommended products.
All existing systems MUST be flushed of ALL old system fluid.  

5. 

Failure to do so may void the boiler warranty if evidence of 

improper flushing is revealed.

Consult with your heating professional for recommendations.

piping recommendations

System leaks may not always be visible. An unseen system 

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