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2I-3. Connections at Heater
The LX and LT have a standard two inch water header and coupling design. With this feature, only nominal two inch PVC or CPVC may be connected to the heater. However, by installing the appropriate pipe adapters and two short pieces of two inch plastic pipe (supplied by the installer), any size existing pipe may be fitted to the heater.
To connect a section of 2” PVC or CPVC pipe to the heater, first slip a coupling nut onto the pipe. Then prepare the end of the pipe with the proper PVC/CPVC primer and glue. Follow the manufacturer’s instructions provided with the primer and glue for preparation procedures and curing times. Apply the
PRESSURE RELIEF VALVE |
HAND TIGHTEN ONLY |
BRASS ADAPTER |
RUBBER WASHER |
Figure 18. Pressure Relief Valve Installation.
2I-4. Pressure Relief Valve
A pressure relief valve is mandatory in any installation in which the water flow can be shut off between the heater outlet and the pool/spa.
A pressure relief valve is not supplied with the heater however, it may be required by local codes.
To install a pressure relief valve, do the following:
1.To protect the threads while drilling, screw the brass adapter (included with the Waterpik Technologies PRV kit) into the blind threaded hole on the top of the inlet/outlet header.
| TEMPORARILY |
| INSTALL BRASS |
| ADAPTER TO |
| PROTECT PLASTIC |
START WITH 1/4" BIT | THREADS |
| |
THEN OPEN HOLE |
|
WITH A 3/8" BIT |
|
THEN OPEN HOLE |
|
WITH A 1/2" BIT |
|
Figure 17. Drill Hole For Pressure Relief Valve
2.Using the countersink in the center of the blind hole as a guide, drill a 1/4 inch hole through the plastic.
3.Open the hole by reaming it with a 3/8 inch drill bit.
4.Open the hole again by reaming it with a 1/2 inch drill bit.
WARNING
Initially drilling a 1/2 inch hole without reaming may cause the bit to "grab" on the plastic. This may cause personal injury or damage to the plastic header.
5.Remove the brass adapter and clean the cuttings out of the hole.
6.Install the rubber washer at the bottom of the hole.
7.Thread the adapter into the hole and tighten so that it seals against the rubber washer.
8.With a permanent marker, place a mark on the adapter so that the mark faces the same direction as the water connections on the header.
9.Remove the adapter from the hole.
10.Coat the threads of the pressure relief valve (PRV) with an appropriate metal to metal thread sealant.
11.Install the adapter on the PRV and tighten using two wrenches. Use the mark made earlier on the adapter to orient the PRV to the desired direction in relation to the water connections on the header.
12.Wrap the threads of the adapter with a suitable teflon thread tape.
