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2.0 Before installation
Before installing the appliance, it is important to review and observe the following checklist of
precautions:
Precautions
Check
Care must be taken to properly size the boiler for its intended use.
Prolonged full fire run time, over-sizing or under-sizing, and incorrect flow rates through the
boiler can lead to increased maintenance costs, equipment stress and premature failure.
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Ensure you install the boiler where the combustion air source is not subject to chemical
fouling or agricultural vapors.
Exposure to corrosive chemical fumes such as chlorinated and/or fluorinated hydrocarbons
can reduce the life of a boiler. Cleaners, bleaches, air fresheners, refrigerants, aerosol
propellants, dry-cleaning fluids, de-greasers and paint-removers all contain vapors that can
form corrosive acid compounds when burned in a gas flame. Airborne chlorides such as
those released with the use of laundry detergents are also to be avoided.
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Locate the boiler where water leakage will not result in damage to the area.
If there is no suitable location, install a suitable drain pan under the boiler. Do not install
above carpeting.
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At a new construction site, or during renovations, protect the boiler from drywall dust or other
construction related contaminants.
Draw combustion air from a
clean
source (e.g., outdoors) and isolate the boiler from interior
dust sources. Do not seal boiler case openings directly when firing - allow for air circulation
and ventilation in the immediate area.
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Place the exhaust outlet 12" minimum above the down-turned intake to avoid exhaust re-
ingestion.
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For sidewall venting options, place the inlet and exhaust terminations on the same side of
the building.
The elevation of both pipes can be raised in “periscope style” after passing through the wall
to gain required clearance above grade and snow level.
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If using the indoor combustion air option, ensure combustion air openings to the boiler room
remain unblocked and free of obstructions.
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Examine the condensate outlet to ensure proper disposal of condensate will occur during
operation. If condensates are to be discharged into building drain piping materials that are
subject to corrosion, a neutralization package must be used.
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Ensure that the pressure relief valve is installed with no valves or other means of isolation
between its inlet and the boiler. Make sure the relief valve outlet is piped with unobstructed
piping (minimum 1" diameter) to a safe discharge location.
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Summary of Contents for EX Series
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Page 121: ...Appendices Wiring diagrams Figure 73 Controller electrical diagram 119 Appendices...
Page 122: ...Figure 74 Internal wiring diagram EX 400 and EX 500 models 120 Section Appendices...
Page 123: ...Figure 75 Internal wiring diagram EX 700 and EX 850 models 121 Wiring diagrams...
Page 124: ...Figure 76 Sequence of Operation 122 Section Appendices...
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Page 128: ...126 Boiler parts diagram EX 400 and EX 500...