20
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in compliance with the Standard
AS/NZS 3500.4 and all local codes and regulatory authority requirements.
All gas work must be carried out by a qualified person and in compliance with the Standard AS 5601 or
AS/NZS 5601.1, as applicable under local regulations, and all local codes and regulatory authority
requirements.
Note:
The water heater is fitted with a gas pressure regulator preset to the gas type of the water heater. There
is no need to install an additional gas pressure regulator unless the gas supply pressure exceeds 3.5 kPa.
CONNECTION SIZES
Model
834 012
834 016
Hot water connection
R 1/2
R 1/2
Cold water connection
R 1/2
R 1/2
Gas inlet connection
Rp 3/4
Rp 3/4
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before
connection and purged before attempting to operate the
water heater. All olive compression fittings must use
brass or copper olives. Use an approved thread sealant
such as Teflon tape on all threaded joints.
A full flow gate valve or ball valve must be installed on
the cold water line to the water heater.
A non-return
valve or stop tap must not be installed.
An acceptable
arrangement is shown in the diagram. Refer also to
“Hot
Water Delivery”
on page 17 and to
“Mains Water Supply”
on page 15.
A disconnection union must always be provided at the
cold water inlet and hot water outlet on the water heater
to allow for disconnection of the water heater.
Insulation used on the cold and hot water lines must extend up to the cold water inlet and hot water outlet of
the water heater.
Notes:
It is essential all pipe connections be correctly aligned, otherwise component connections within the water
heater may be strained and / or components themselves misaligned. It is recommended also, wherever
possible, pipe connections be made at the water heater first and final pipe runs be made in soft copper
pipe to allow some adjustment for misalignment.
Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and outlet
pipes inside the jacket.
PIPE SIZES
The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing
the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical
specifications of the water heater and local regulatory authority requirements must be made.
To achieve true mains pressure operation, the cold water line to the water heater should be the same size or
bigger than the hot water line from the water heater.
The minimum recommended cold pipe and hot pipe size is DN15.
Gas Water Heater
Cold and Hot Water and Gas Connection Details
GAS
COCK
GAS
COLD WATER
PRESSURE LIMITING VALVE
(PSL TYPE)
GATE VALVE
OR
BALL VALVE
NATURAL / PROPANE
GAS PRESSURE
REGULATOR IS
FACTORY - FITTED
INSIDE
HOT
WATER
COLD & HOT WATER & GAS CONNECTION DETAILS
MECHANICAL INSTANTANEOUS
843 SERIES
SK7690 REV AD 6/15
