Connections – Plumbing; Water Inlet And Outlet - Rheem 27 Owner's Manual And Installation Instructions

CONNECTION SIZES
Model
Hot water connection
Cold water connection
Gas inlet connection
All plumbing work must be carried out by a qualified person and in accordance with the National Plumbing
Standard AS/NZS 3500.4 and local authority requirements.
All gas work must be carried out by a qualified person and in accordance with the Australian Gas
Installations Standard NZS 5261 and local authority requirements.

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 thread sealing tape or approved
thread sealant on all fittings.
A full flow gate valve or ball valve must be installed on the
cold water line or solar preheat 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
and to "Mains Water Supply"
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.
Run 32mm combined condense and pressure relief line (UPVC) to outside of building preferably over gully
trap.
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.
•
The maximum supply temperature to the water heater when used as an in-series gas booster for a solar
preheat water heater should not exceed 80°C.
CONNECTIONS – PLUMBING
864 027
R¾/20
R¾/20
R¾/20
"Hot Water Delivery" on page 46
on page 45.
HOT
WATER
POWER
CORD
PRESSURE
LIMITING
(not required if water
heater is installed as
an inline gas booster
to a solar water heater)
Gas Water Heater
Cold (or Solar Preheat) and Hot Water
and Gas Connection Details
55
GAS
COCK
GAS
COLD OR SOLAR
PREHEAT WATER
VALVE
GATE VALVE
OR
BALL VALVE