Connections - Plumbing; Connections - Electrical - Rheem Integrity 20 Owner's Manual And Installation Instructions

CONNECTIONS - PLUMBING

CONNECTION SIZES
Model
Hot Water Connection
Cold Water Connection
Gas Connection
Thermal Input (MJ)
Weight (kg)
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.
Care should be taken not to twist the water inlet and outlet pipes inside the jacket.
All pipes should be well flushed before connections are made.
HOT WATER OUTLET
For the position of the hot water outlet, refer to page 18. A disconnection union must
be provided. Insulation used on the hot pipe must extend up to the hot water outlet of
the water heater. The hot water pipe runs should be as short as possible to service
the outlets. The hot water pipe should be sized to ensure adequate hot water flow to
all outlets. The recommended pipe size is DN20.
COLD WATER INLET
An approved gate valve or ball valve and disconnection union must be fitted on the
cold water supply pipe before the water heater (refer to page 18). Do not fit a non-
return valve or stop cock. The cold water supply pipe should be sized to ensure
adequate flow. The recommended pipe size is DN20.
GAS INLET
The pipe work must be cleared of foreign matter before connection and purged before
attempting to operate the water heater. An isolation valve and disconnection union
must be used to allow for servicing and removal of the water heater. Refer to the AGA
Gas Installation Code for the correct pipe sizing.
Note: The pipe size selection must take into account the high gas input of this water
heater (refer to table on page 19) as well as all of the other gas appliances in the
premises.

CONNECTIONS - ELECTRICAL

The water heater is supplied with a 1.8 metre lead and plug and requires a 240 volt,
50 Hertz electricity supply. A weatherproof power point is required. The power point
must be clear of the flue exhaust, draining water, gas supply pipe and water
connections.
871 018
R / /15
1
2
R / /15
1
2
R / /20
3
4
157
20
19
871 020 871 024
R / /20 R
3
4
R / /20 R
3
4
R / /20 R
3
4
157
20
/ /20
3
4
/ /20
3
4
/ /20
3
4
188
21