All Gas Installations; Natural Gas - Hayward H250FDN Service & Installation Manual

GAS SUPPLy INSTALLATION:
The heater is shipped from the factory with the gas connection
located on the left-hand side of the heater cabinet. Insert the pipe to
the gas valve through the grommet in the cabinet side (see Figure
18.) A union should be installed outside the heater cabinet for easy
removal of the gas manifold assembly during service.
A CSA certified main gas shutoff valve must be installed outside
the cabinet and within  feet of the heater. This valve must have an
I.D. large enough to supply the proper amount of gas
volume to the heater. See Figure 17.
ATTENTION: Apply joint compound (pipe dope)
sparingly and only to the male threads of pipe joints.
Do not apply joint compound to the first two threads.
Use joint compounds resistant to the action of lique-
fied petroleum gas. Do not overtighten the gas inlet
pipe or damage may result.
ATTENTION : Do not use flexible appliance con-
nectors on any gas connections unless the connector is
CSA approved for outdoor installation, is marked with
BTUH capacity (which must be equal to or greater
than the heater rated input) and the type of gas (natural
or LP).
Reduction of gas supply pipe or tubing to the inlet of
the heater gas valve must be made at the valve only and must match the valve inlet size (3/4" NPT).
If more than one appliance is installed on the gas line, consult the local gas company for the proper gas
line size.
Questions on the installation of the proper gas line size can be directed to Hayward Technical Service.

NATURAL GAS:

The gas meter must have the capacity to supply enough gas to the pool heater and any other gas appli-
ances if they are on the same pipeline (Example: 5 meter = 5,000 BTUH). If doubt exists as to the meter
size, consult the local gas utility for assistance. Hayward will not be responsible for heaters that soot up due
to improper meter and gas line sizing resulting in improper gas volume.
PROPANE GAS:
All propane gas tanks must be located outdoors and away from pool/spa structure and in accordance
the standard for storage and handling of propane gas, ANSI/NFPA 58 (latest edition) and applicable local
codes. If the propane gas tank is installed underground, the discharge of the regulator vent must be above the
highest probable water level.
Propane tanks must have sufficient capacity to provide adequate vaporization for the full capacity of the
equipment at the lowest expected temperatures. Consult a propane company expert for correct sizing.
Figure 18
Gas
inlet
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400
Figure 17
Bonding lug (not shown)
www.haywardpool.com
19
Supply
voltage
inlet
Low
voltage
inlet
with