Connections At Heater; Pressure Relief Valve - Jandy Lite2 Installation And Operation Manual

Model LD Pool and Spa Heater
place by two screws which mount to the top of
the combustion chamber wall. Remove the
screws and the baffles before attempting to lift
the heat exchanger out of the heater (see Figure
11).
CAUTION
It may be necessary to have help lifting the heat
exchanger out and replacing it.
ATTENTION
Il peut être nécessaire d'avoir besoin d'aide pour
enlever et remplacer l'échangeur de chaleur.
12. Lift the heat exchanger assembly out of the
heater. Reinstall heat exchanger 180 degrees
(inlet/outlet header left) from it's original posi-
tion.
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 assem-
bly 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 12). 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 13):
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.

5.6 Pressure Relief Valve

A pressure relief valve (PRV) is recommended
in all installations and is mandatory in any installation in
which the water flow can be shut off between the
heater outlet and the pool/spa.
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