Unit installation

1.8 GAS CONNECTION
(1)
Fit a union to the water heater gas inlet for easy connection and removal. The thread
diameter is 18mm.
THIS DOES NOT INDICATE THE SIZE OF THE GAS SUPPLY refer to AS5601
for
guidance on pipe sizing.
(2)
Fit an AGA approved isolating gas cock in the supply line adjacent to the water heater gas
connection.
(3)
Ensure that the supply pipe and the gas pressure regulator(LPG or NaturalGas) has
sufficient flow capacity for this and other appliances connected to the fitting line.
(4)
For LPG appliances ensure that gas cylinders are of sufficient size.The water heater alone
will require a regulator of 4KG per hour capacity.
(5)
Before connecting the appliance to the gas service purge any debris or air from the gas
service. Venting of purged gas shall be an area free of sources of ignition.
Close the isolating gas cock prior to connection of the appliance.
(6)
After connection check all joints for leaks with an approved leak tester.
Refer to AS5601
Installation Code for pipe sizing details. For your assistance we have
included the following pipe sizing from
AS5601
for copper tube using Natural Gas.
NOMINAL PIPE
SIZE IN mm
STRAIGHT LENGTH OF
PIPE METRES
HOURLY RATE
IN MJ/h
13
4 43.0
18
4
82.2
20
4
142.0
25
4
313.0
THE ETERNITY 16/20/26 REQUIRES A MINIMUM OF 125/160/200 MJ/h FOR
THE CUSTOMER TO OBTAIN THE FULL PERFORMANCE BENEFIT.
SERVICE CALLS ARE CHARGEABLE FOR
UNITS WITH INCORRECT GAS PIPE SIZES.
GAS CONNECTION
6