P/N 471438
Rev. A 2-4-2000
REMOVING THE HEAT EXCHANGER
For heavy soot accumulation which cannot be successfully removed by merely brushing or use of a
vacuum cleaner, the heat exchanger must be removed for the heater.
1.
Isolate both gas and electrical supply to the heater.
2.
Isolate water supply and drain down the heater.
3.
Remove the top from the heater.
4.
Remove inner lid, flue collector and inspection panels.
5.
Disconnect the plumbing at the break away flanges and the pressure switch line. Remove the thermostat
bulb and hi-limit wires from the inlet/outlet header.
6.
Remove the heat exchanger mount screws on the side of the heater.
7.
Lift heat exchanger out of heater.
CAUTION
When lifting heat exchanger out of the fire brick, use caution so as not to damage the fire brick.
REINSTALLING HEAT EXCHANGER
1.
Inspect fire box for damage or cracks that would allow heat to leak out into the outer cabinet and controls.
2.
Remove any old sealant from fire box.
3.
Apply new sealant to the fire box (Silicon Rubber Industrial Grade R.T.V.) or equivalent. The sealant must
completely seal the space between the heat exchanger and the fire box, so that when the heater is firing,
heat does not escape to the outer cabinet.
4.
Place heat exchanger into the box and push down firmly, until the heat exchanger sets solidly on the fire box.
5.
Reconnect the inlet and outlet flange to the headers (use new flange gaskets) careful not to move the heat
exchanger and break the seal.
6.
Reinstall flue collector, inner panel and top.
7.
Re-establish gas, water and electrical supplies; checking water tightness, gas soundness and electrical
continuity.
Servicing Section
21
Содержание PacFab MiniMax 100
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