Rheem Integrity 20 Owner's Manual And Installation Instructions page 17

INSTALLATION - WATER HEATER
FLUEING
This water heater does not require additional flueing. A secondary flue must not be
installed.
FROST PROTECTION
The water heater may have frost protection. Refer to the rating label on the water
heater. The frost protection system will protect the water heater from damage, by
preventing ice forming in the waterways of the water heater, in the event of freezing
occurring. Models without frost protection are not covered under warranty for damage
caused by freezing and must not be installed in areas subject to frost conditions.
The frost protection system will be rendered inoperable if electrical power is not
available at the water heater. Damage to the water heater caused by freezing of the
pipework to or from the water heater is not covered under warranty. Refer to AS/
NZS 3500 for precautions to be taken for installations in frost prone areas. The
water heater is not suitable for installation in areas where the ambient temperature
falls below -20ºC (including wind chill factor).
WATER SUPPLY
Where the water supply pressure exceeds that shown below, an approved pressure
limiting valve is required and should be fitted as shown in the installation diagram
(refer to page 18).
Model
Maximum
18
20
24
* minimum water supply pressure required to
achieve the rated flow and performance.
Notes:
It is not recommended to install this water heater with a low pressure water
supply.
This water heater is not suitable for connection to bore water or spring water
unless a water treatment device is fitted.
If sludge or foreign matter is present in the water supply, it is recommended a
suitable filter be incorporated in the cold water supply pipe to the water heater.
Refer to Water Supplies on page 27.
HOT WATER DELIVERY
The delivery water temperature requirements of AS/NZS 3500.4 must be considered.
We recommend and it may also be required by regulations, that a temperature limiting
device be fitted for any ablution area, such as a bathroom or ensuite.
Water Pressure kPa
Minimum *
1000
1000
1000
140
140
140
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