Mains Water Supply - Rheem 27 Owner's Manual And Installation Instructions

MAINS WATER SUPPLY

Where the mains water supply pressure exceeds that shown in the table below, an approved pressure
limiting valve that does not have non return valve characteristics (such as an RMC PSL series valve) is
required and should be fitted as shown in the installation diagram
Model
Relief valve setting
Max. mains supply pressure
Min. mains supply pressure *
* 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.
•
A minimum water supply pressure of 140 kPa is required to achieve the rated flow and performance of
the water heater.
•
If this water heater is installed as a gas booster for a solar water heater, the maximum water supply
pressure to the solar preheat water heater, without an expansion control valve (ECV), is generally
800 kPa, however it may be less than this for some models. Refer to the Owner's Guide and Installation
Instructions supplied with the solar water heater for maximum mains supply pressure details.
•
If sludge or foreign matter is present in the water supply, it is recommended a suitable filter be
incorporated in the cold water line to the water heater.
•
This water heater is not suitable for connection to bore water or spring water unless a water treatment
device is fitted.
•
Refer to "Water Supplies"
027
1750 kPa
1000 kPa
140 kPa
on page 39 for further information on water chemistry.
45
INSTALLATION – WATER HEATER
(refer to page 55).