Installation Guide

Pomona, CA Clemmons, NC Nashville, TN
Tel: [phone] www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
23
ATTENTION: Whenever a high-pressure double regulation system is utilized for propane gas, consult
a propane expert for accurate pipe and pressure sizing. Make sure that 1st and 2nd stage regulators are
large enough to handle the BTUH input listed for the heater(s) being used.
Hayward will not be responsible for heaters that soot up due to improper gas line or propane tank sizing
resulting in improper gas volume.
WATER PIPING:
The heater is designed for use with pool and spa/hot tub water only, as furnished by municipal water dis-
tribution systems. The warranty does not cover heater use with mineral water, seawater (PPM>5000), or other
non-potable waters.
Do not install any restriction in the water pipe between the heater outlet and the pool/spa with the
exception of:
1. three-way switching valve
2. in-line chlorinator
3. chlorinator check valve
WARNING: EXPLOSION
HAZARD Blockage of water
ow from heater return to pool
may result in re or explosion
causing property damage,
personal injury, or loss of life.
The heater is equipped with CPVC anged pipe
nipples to accomodate water piping to and from the pool
or spa. These pipe nipples will accept piping by solvent
welding (PVC glue). The ttings will accept either a
2” pipe, or a 2 1/2” pipe tting, and seal to the heater
header with rubber gaskets. On plastic headers, the t-
tings are secured in place with plastic union nuts, and on
bronze headers (ASME models), the ttings are secured
in place with bolts. Assemble these parts to the heater
prior to plumbing. Tighten union nuts (or bolts) securely
before gluing ttings to the ends of the pipe nipples. See Figure 15.
The CPVC anged pipe nipples must be installed on the heater inlet and outlet without modication.
Pipe, ttings, valves, and any other element of the lter system may be made of plastic materials, if accept-
able to the authority having jurisdiction.
Heat sinks, heat tapes, remen switches, and check valves are not required on the heater. However, if there
is any chance of “back-siphoning” of hot water when the pump stops running, it is suggested that a check valve
be used on the heater inlet pipe.
The built-in bypass inside the header will maintain proper ow through the heat exchanger if the ow rate is
within the range for the heater. See Table 14.
The minimum ow rate is to be calculated or measured with the inoor cleaning system in use, if the pool is
so equipped, as well as any other jets or other demands on the water ow.
Figure 15: Pipe nipples
Gaskets
Fittings
Bolts
Heater
Header
Bronze Header (ASME)
Plastic Header
Gaskets
Fittings
Union Nuts
Heater
Header