Zodiac Legacy LRZ Specifications download pdf (Page 17)

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Installation and Operation Manual

Legacy™ Model LRZM Pool/Spa Heater

12. Place the inlet/outlet header over the bolts and

gasketed tubes on the left side of the tube assem-

bly. Make sure the high limit devices are on the

bottom. Refer to Figure 9. Align the bolt and tube

holes in the header with the bolts and tubes in the

header bar and slide the assembly together.

13. Thread on the 10 bolts and washers and hand

tighten.

14. Place the return header over the bolts and gasket-

ed tubes on the right side of the tube assembly.

Align the bolt and tube holes in the header with

the bolts and tubes in the header bar and slide the

assembly together.

15. Thread on the 10 bolts and washers and hand

tighten.

16. Use a torque wrench to tighten the bolts on each

header to 4 ft-lbs. The bolts must be tightened in

the sequence indicated in Figure 11.

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Failure to tighten the header as indicated in step 16

may cause the header to leak or become perma-

nently damaged from warping.

17. Remove the 3/4 inch button plug located in the

left side panel below the inlet/outlet header and

replace with the 3/4 inch wire grommet from

the right side panel below the return header.

The high limit leads were routed through this

grommet prior to removal in step 5. Install the

3/4 inch plug in the opening where the 3/4 inch

wire grommet was removed.

18. Reconnect the white wire on the pressure switch

(PS) and the white wire on the Fireman's switch

terminal.

19. Reinstall the temperature sensor in the inlet/

outlet header and tighten the nut.

20. Reconnect the black and white wires to the water

pressure switch.

 

 

O-RING

COUPLING

NUT

PVC OR CPVC PIPE

21. Use plastic wire ties to refasten the temperature

sensor, high limit switch and water pressure

switch wires to each other. Bundle the wires near

the control panel and fasten them with a wire tie.

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In order to prevent property damage or injury, be

sure that none of the wires are in contact with a

sharp edge or a hot surface.

22. Install the return header side cover plate on the

right side of the unit.

23. Install the I/O header side cover plates, top and

bottom on the left side of the unit.

24. Replace the front panel (door).

 

The Legacy Model LRZ millivolt heater has a

standard 2 inch water header and coupling design.

With this feature, only nominal 2 inch PVC or CPVC

may be connected to the heater. However, by installing

the appropriate pipe adapters and two (2) short pieces

of 2 inch plastic pipe (supplied by the installer), any

size existing pipe may be tted to the heater.

To connect a section of 2 inch PVC or CPVC

pipe to the heater, rst slip a coupling nut onto the

pipe. Then prepare the end of the pipe with the proper

PVC/CPVC primer and glue. Follow the manufac-

turer’s instructions provided with the primer and glue

for preparation procedures and curing times. Apply

the slip-t side of the coupling to the end of the pipe.

Allow the glue to cure completely. Set the o-ring

into the groove on the face of the coupling. Slide the

coupling nut up to the coupling and tighten it to the

threaded connection on the header (see Figure 12).

 

A pressure relief valve (PRV) is recommended in

all installations, and is mandatory in any installation

in which the water ow can be shut off between the

heater outlet and the pool/spa.

A pressure relief valve is not supplied with the

Legacy Model LRZ millivolt heater. However, it is

recommended that a pressure relief valve be installed

and may even be required by local codes.

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