Installation Guide

Pomona, CA Clemmons, NC Nashville, TN
Tel: [phone] www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
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INSTALLATION ABOVE POOL/SPA SURFACE:
If the heater is installed less than three (3) feet above the sur-
face of the pool/spa water, install eyeball ttings or directional ow
ttings on the end of the return water line to the pool/spa to create
adequate back pressure at the heater to operate the pressure safety
switch when the lter pump is running.
If the heater is installed more than three (3) feet above the surface
of the pool/spa water, install a loop as shown in Figure 19 to prevent
drainage of water in the heater during a lter change.
For installation below the pool/spa surface, refer to Section III.
Figure 17: Typical plumbing to pool
Figure 18: Multiple heater system
Figure 20: Automatic chlorinator
Figure 19: Heater installation
above pool/spa
AUTOMATIC CHLORINATORS AND
CHEMICAL FEEDERS:
If used, a chlorinator must be installed downstream from the
heater in the pool return line and at a lower elevation than the heater
as shown in Figure 20. Install a separate positive seal corrosion
resistant check valve between the heater outlet and the chlorinator to
prevent highly concentrated sanitizers from backsiphoning into the
heater. Backsiphoning usually occurs when the pump is shut off and
a pressure differential is created.
Figure 17 illustrates a typical pool piping diagram and layout for the pool equipment.
Figure 18 illustrates a multiple heater installation for very large pools with and without a manual
bypass valve.