Rheem 511161 Owner's Manual And Installation Instructions page 26

INSTALLATION – SOLAR STORAGE TANK
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a minimum water supply pressure of 200 kPa
at the water heater cannot be achieved, then a pressure pump system must be installed to allow the solar
circuit system to operate. Care must be taken to avoid air locks. The cold water line from the supply tank should
be adequately sized and fitted with a full flow gate valve or ball valve. Consideration must be given to any
minimum water supply pressure requirements of an in-series water heater.
WALL BRACKET
It is a requirement to secure the solar storage tank to the wall. Fit
the wall bracket and secure the solar storage tank to the wall prior
to the mounting of an in-series gas booster to the solar storage tank.
The top of the unit is to be secured to the wall with the wall bracket,
wall plugs and screws provided. If the wall plugs and screws
provided are not suitable for the wall construction, then other
suitable fasteners are to be used. Refer to the fastener
manufacturer's information and recommendations for the type of
fastener to use for the wall type and load bearing requirements.
To fit the wall bracket:

Position the bracket against the wall, ensuring the bracket is
centred at the rear of the storage tank top, and mark the fixing
points on the wall where the bracket is to be secured.

Drill holes in the wall to receive the wall plugs supplied or other
suitable fasteners for the wall bracket.

Fix the wall bracket to the wall using the screws provided or other suitable fasteners.

Secure the bracket to the top of the water heater using the self-tapping screws provided.
HOT WATER DELIVERY
This water heater can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted between the water heater and
the hot water outlets in any ablution and public areas such as a bathroom, ensuite or public amenities, to
reduce the risk of scalding. The installing plumber may have a legal obligation to ensure the installation of this
water heater meets the delivery water temperature requirements of AS/NZS 3500.4 so that scalding water
temperatures are not delivered to a bathroom, ensuite or other ablution or public area.
The temperature limiting device must be of a type suitable for use with a solar water heater and should have:

a specified 'minimum temperature differential' between the hot water inlet and the tempered water outlet
of no greater than 10°C, when used with a solar water heater and continuous flow water heater

a specified 'maximum permitted pressure variation' in either supply between the hot water inlet and the
cold water inlet of no less than 15% when used with a continuous flow water heater.
Refer to the specifications of the temperature limiting device.
Warning: Temperature controllers or an EZiSET kit must not be fitted to the in-series water heater as part
of a solar water heater system because water at a temperature much higher than the controller or EZiSET
setting can be delivered.
Where a temperature limiting device is installed adjacent to the in-series water heater, the cold water line to
the temperature limiting device can be branched off the cold water line either before or after the isolation valve
and pressure limiting valve to the solar storage tank, but it MUST BE before a non-return valve. If an expansion
control valve is required, it must always be installed after the non-return valve and be the last valve prior to the
solar storage tank.
Solar control unit, PN 052294 (introduced to 511161 solar storage tanks manufactured from August 2018),
contains a non-return valve at the inlet to the circulator. For a water heater fitted with this solar control unit, a
non-return valve installed on the cold water line to the tank, and after the cold water branch to a temperature
limiting device, is not required to be a dual check valve type.
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