Connections At Heater - Jandy LG125 Installation And Operation Manual

Model LG Pool and Spa Heater
13. After replacing the heat exchanger into the
heater, the end baffles must be replaced. Each
one is held in place by two screws which mount
to the top of the combustion chamber wall.
Reinstall the baffles on the front and rear of the
heat exchanger before continuing with the
"Reversible Water Connections" procedure.
14. Remove pressure switch retainer (plastic cable
clamp) from the inner panel (allow pressure
switch to float).
15. Reroute the pressure switch tube and thermostat
bulb assembly through hole in left side of
vestibule cover in reverse order.
16. Reinstall the temperature sensing bulb in the
header, and fasten it with the retainer bracket and
screw.
17. Reinstall the compression fitting at the end of the
pressure switch tube into inlet/outlet header and
tighten the fitting.
18. Route the white wiring from the high limit
switches beside the heat exchanger and down to
the original location following the pressure switch
tubing. Secure white wires to the pressure switch
tube with plastic wire ties.
19. Connect the white wire labeled PS to the pres-
sure switch and the other white wire to its
original location on the Fireman's switch.
20. Reinstall the drain plugs and tighten securely.
Replace jacket/plug grommets.
21. Install the flue collector assembly. Be sure the
front and rear panels of the flue collector are
installed into the grooves on the front and rear
combustion chamber heat shield panels. Be sure
the sheet metal panels are not pinching any
wires.
22. Attach the flue collector hold down clamps to the
clips located under the two center header bolts.
23. Replace the gap closures and tighten the screws
securely.
24. Double-check to make sure the wiring is not
pinched against sharp edges, or resting on the
flue collector assembly.
25. Reinstall rainshield assembly.
26. Replace the top assembly. Make sure the tabs
are outside the heater jacket. Fasten the top
assembly with the hex-head screws.
27. Install plastic tie wraps on wiring in the vestibule
(controls compartment).
28. Install heater door.

5.5 Connections at Heater

The heater has 2" NPT universal header cou-
plings. You can connect threaded 2" NPT iron pipe,
unthreaded 1 1/2" iron or copper pipe or unthreaded 2"
copper pipe using the appropriate seals included with
this heater (see Figure 13). However, by installing the
appropriate pipe adapters, other sizes may be used.
Plastic piping (PVC Schedule 40) can be con-
nected to the heater if local codes allow it, by using
the CPVC nipples included with your heater.
To install plastic piping (see Figure 14):
1. Remove CPVC nipples from plastic bag.
2. Screw CPVC nipples into metal flange until tight,
using Teflon™ tape on plastic threads.
3. Prepare the end of the pipe with the proper
adapter, PVC/CPVC primer and glue. Follow the
manufacturer's instructions provided with the
primer and glue for preparation procedures and
curing times.
Figure 13. Piping installation.
Page 15