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15.
Pull the wires out of the front compartment
through the top, and coil them on the heat ex-
changer. Disconnect the black wire from the
pressure switch.
16.
Remove the screw holding the white nylon cable
clip behind the pressure switch on the back panel.
Disconnect the pressure switch tubing at the in/
out header by loosening the top hex nut. Place the
whole assembly in a safe place.
17.
Remove the temperature sensing bulb from the
back of the header by loosening the cap screw.
Slide the retainer bracket off the bulb flange.
Remove the bulb from the header and rotate it out
of the way.
CAUTION
It may be necessary to have help lifting the
heat exchanger out and replacing it.
Figure 38. Heat Exchanger Reversal
18.
Lift out the heat exchanger assembly, rotate it
180 degrees, and re-seat the unit in the heater.
19.
Connect the pressure switch copper tubing on the
back of the header, and locate the switch in its
original position. Carefully straighten the copper
tubing as necessary. Fasten the tubing to the rear
panel using the cable clip and screw.
20.
Install the temperature sensing bulb in the header,
securing it with the retainer bracket and cap
screw. Route the wires inside the heater jacket.
21.
Route the wiring harness beside the heat ex-
changer and down to the original location. Be
careful to keep the wires away from all heat
producing surfaces.
22.
Connect the white wire labeled PS to the pressure
switch. Connect the other white wire to its
original location on the terminal block.
23.
Install the drain plugs.
24.
Replace the three grommets and the button plug.
25.
Make sure the baffle retainers are secure.
26.
Slip the flue collector assembly down inside the
enclosure. Be sure the bottom lips are inside the
grooves on the front and rear combustion cham-
ber panels.
27.
Attach the flue collector hold down clamps to the
clips located under the two center header bolts.
Figure 39. Flue Collector Hold Down Clamps
BUTTON PLUG
GROMMETS
VENT CAP
ADAPTER
PLATE
