LX and LT Low NOx Pool/Spa Heater
Page 15
8.
Clip the wire tie that bundles the wire harnesses
leading from the control panel. Disconnect the
two black temperature sensor wires from the
back of the control panel. Coil the wires and
place them on top of the flue collector.
9.
Disconnect the high limit switch black wires from
the wire harness leading to the control panel.
There are quick disconnects at the end of the
wires.
10.
Remove the flat inlet/outlet header side cover
plate located under the inlet/outlet header. There
are four philips head screws, one in each corner,
holding it in place.
11.
Slide the upper right side panel up and out of the
corner posts and place it aside.
12.
For an existing installation, disconnect the gas
supply pipe from the gas valve and remove it
from the heater.
13.
Remove the left side cover panel, held to the
lower panel with two philips head screws at the
corners.
14.
Remove the flat return header side cover plate to
expose the return header by removing the four
philips head screws, one in each corner.
15.
Slide the upper left side panel up and out of the
corner posts and place it aside.
16
For an existing installation, remove the coupling
nuts from the header and disconnect the water
supply from the heater.
17.
Remove the nine (9) bolts and washers from the
inlet/outlet header and remove the header from
the tube assembly.
18.
Remove the nine (9) bolts and washers from the
return header and remove the header from the
tube assembly.
19.
For an existing installation, inspect the header
gaskets and clean the header's mating surface of
any corrosion or debris.
Do not use any metal
tools on the header surface.
Scratches may
compromise the seal integrity.
20.
Place the inlet/outlet header over the gasket on
the left side of the tube assembly and align the
holes in the header with the holes in the header
bar.
21.
Insert the nine (9) bolts with washers through the
header and into the header bar.
Hand tighten
the bolts.
22.
Place the return header over the gasket on the
right side of the tube assembly and align the holes
in the header with the holes in the header bar.
23.
Insert the nine (9) bolts with washers through the
header and into the header bar.
Hand tighten
the bolts.
24.
Use a torque wrench to tighten the bolts on each
header to eleven (11) foot-pounds. The bolts
must be tightened in the sequence indicated in
Figure 14.
25.
After completing the entire sequence as indicated
in step 24, repeat the tightening sequence torqu-
ing the bolts to eighteen (18) foot-pounds.
CAUTION
Failure to tighten the header as indicated in
steps 24 and 25 may cause the header to leak
or become permanently damaged from
warping.
ATTENTION
Si le tuyau collecteur n’est pas serré
conformément aux directives des étapes 24 et
25, il risque d’avoir des fuites ou de
s’endommager de façon permanente.
26.
Carefully bend the water pressure switch's
copper siphon loop tube so that it reaches the
inlet/outlet header now on the left side of the
heater.
Do not
straighten out the coil directly
behind the raceway and
do not
“kink” the
tubing. Straightening the coil or kinking the tubing
may result in poor heater operation. Insert the
end of the tube into the fitting on the header.
Tighten the nut onto the fitting one half turn past
hand tight.
Figure 14. Header bolt tightening sequence
