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47
Maintenance
Periodic Maintenance of Heater and Inspections
All high efficiency condensing appliances will require more regular maintenance (cleaning) than their non-condensing counterparts.
Failure to do so may result in damage to the appliance that is not covered under warranty. Failure to follow all of the instructions
contained in this manual may also cause premature product failure that may not be covered under warranty.
Periodic maintenance should be performed at least once a year by a qualified service technician to ensure that all the equipment is in
safe, efficient operation.
Failure to do so may eliminate warranty coverage.
In the first year of operation, it is highly recommended
that inspections of all connection points and the combustion chamber be done at three month intervals, any signs of fouling or
leaks must be thoroughly investigated immediately as failure to do so may void warranty. Assuming no cause for excessive fouling
is found, then the period of months from initial start up that it was found that cleaning was required, shall become the required
future minimum cleaning interval, but at no time should it exceed 12 months. The owner MUST make necessary arrangements with
a qualified heating contractor for proper maintenance of the heater. Installer must also inform the owner that the lack of proper care
and maintenance of the heater may result in a hazardous condition and lack of warranty coverage. The installer should discuss the
contents of the User’s Information Manual with the owner.
Annual Inspection
(See the Maintenance Checklist for required tools and materials)
An inspection should cover, at a minimum, the following areas:
• Inspect all fittings, controls and connections for leaks, damage, or fouling
• Fire side:
-Heat exchanger
-Burner and ignitor
-Burner door and rear wall insulation
• Drain system components:
-Hoses & clamps
-Trap assembly
-Condensate neutralizer
• Test all safeties and operating controls
• Water side temperature rise (∆T) test
Inspection And Cleaning (photos illustrating each step follow sets of instructions)
• Remove the front cover and check the sensors, transducers, all pipes, lines and
connections, and the heat exchanger (top, bottom) for traces of water and water leakage.
• Inspect the top of the casing and/or the top of the appliance for water leakage or traces of
water from the air supply pipe or the air vent (if applicable).
• Dismantle the burner unit: remove the (6) 6mm nuts (with a 10mm socket), the ignition
cable, the power and speed control plugs, and the ground wire from the fan, and remove
the burner/fan unit from the heat exchanger and cabinet.
• After the burner door is removed, it should be thoroughly inspected before being put back
into service. There are two gaskets on the burner door; the first is the inner rope gasket,
which is permanently affixed to the burner door. If this gasket is completely compressed
(having no sealing ability), the door must be replaced. The second gasket is on the
perimeter and is made of rubber; this gasket is easily replaced, and comes as a standard
part of a maintenance kit (and should always be replaced during the annual maintenance
procedure.
NOTE: Over-tightening the M6 nuts may cause the threaded rods on the front of the
heat exchanger to break! If excess resistance is encountered when installing a M6 nut,
discard that nut and use one of the spares shipped with the unit. The maximum torque
for assembling a burner door nut is 5.9 ft-lb or 70.8 in-lb. Use a torque wrench suitable
for this torque range to tighten the nuts.
Complete burner, door &
fan assembly removed for
inspection
CAUTION! Before removing the door of the appliance, switch off the electrical power supply to it.