Pressure Relief Valve - Hayward H250FDN Service & Installation Manual

PRESSURE RELIEF VALVE:

It may be necessary to install a pressure relief valve to conform with local building codes. A ¾" pressure
relief valve with a discharge capacity greater than or equal to the BTUH input of the heater and a pressure
relief rating less that the heater working pressure is recommended. See the heater rating plate located on the
base pan inside the front access panel for the input rating and working pressure.
A ¾" NPT connection is provided in the header for installation of a pressure relief valve (see Figure
). Install the valve directly to the header in a horizontal position with the discharge connection facing the
ground. Connect a pipe (of the same size as the valve outlet) to the outlet and run it to a safe place of dis-
charge. Do not install any shut-off or restriction in this drain line.
ELECTRICAL SPECIFICATIONS :
GENERAL INFORMATION :
Wiring connections must be made as shown in the wiring diagram found on the inside of the control box
cover.. The heater must include a definite means of grounding and bonding. There is a ground lug inside the
control box and a bonding lug on the side of the heater.
MAIN POWER :
WARNING - Power connections supplied to the heater must be in accordance with National Electric
Code (NEC) and local electric codes. The NEC contains no standards requiring Ground-Fault Inter-
ruption protection (via GFI Circuit Breaker or otherwise) of "Fixed" or "Stationary" equipment, under
article 80: Swimming Pools, Fountains, & Similar Installations.
BONDING :
CAUTION - This heater must be connected to a bonding grid with a solid copper conductor wire
gauge 8 AWG or larger. All Hayward heaters are designed for copper conductors only. The National
Electrical Code (NEC), and most other codes require that all metallic components of a pool structure,
including reinforcing steel, metal fittings and above ground equipment, be bonded together with a solid
copper conductor wire gauge 8 AWG or larger. The heater, along with pumps and other pool equipment
must be connected to this bonding grid. A bonding lug is provided on the side of the heater to ensure
that this requirement is met.
WARNING: It is required that licensed electricians do all electrical wiring. Risk
of Electric Shock. Hazardous voltage can shock, burn, and cause death or serious
property damage. To reduce the risk of electric shock, do NOT use an extension cord
to connect unit to electric supply. Provide a properly located electrical receptacle. All
electrical wiring MUST be in conformance with applicable local and national codes
and regulations. Before working on heater, turn off power supply.
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400 www.haywardpool.com