Specifications

CONNECTIONS – PLUMBING
44
IN-SERIES BOOSTER – REMOTE LOCATION
The in-series booster water heater may be installed remotely from the solar storage tank.
If the in-series water heater is a continuous flow gas water heater, this may be located adjacent to the right
had side of the solar storage tank, subject to the location of the flue terminal complying with the requirements
of AS 5601 or AS/NZS 5601.1. The in-series gas booster can be connected to the solar storage tank using
the fittings and braided hose supplied with the solar storage tank and following the procedure outlined under
“In-Series Booster – Integrated” on page 43. A full flow isolation valve need not be installed.
Otherwise, the pipe work between the solar storage tank and an in-series water heater has a minimum
recommended pipe size of DN20, MUST BE of copper and be fully insulated with a closed cell type
insulation or equivalent in accordance with the requirements of AS/NZS 3500.4. In Victoria, insulation with a
minimum R-value of 0.6 (usually 25 mm thick) must be used to achieve compliance to local regulatory
requirements.
The insulation must be weatherproof and UV resistant if exposed. The insulation must be fitted up to the
connections on both the solar storage tank and the in-series water heater. A full flow isolation valve must be
installed on the water line to the in-series water heater.
PIPE SIZES
To achieve true mains pressure operation, the cold water line to the water heater should be the same size or
bigger than the hot water line from the water heater.
The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing
the most suitable pipe size for each individual application. Reference to the technical specifications of the
water heater and local regulatory authority requirements must be made.
TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is supplied in the plastic bag with the solar control unit ground kit
components. The temperature pressure relief valve must be fitted before the water heater is operated.
Before fitting the relief valve, make sure the probe has not been bent. Seal the thread with Teflon tape -
never hemp. Make sure the tape does not hang over the end of the thread.
Screw the valve into the correct opening (refer to the installation diagram on page 32) leaving the valve outlet
pointing downwards. Do not use a wrench on the valve body - use the spanner flats provided. A copper drain
line must be fitted to the temperature pressure relief valve (refer to "Relief Valve Drain" on page 45).
The valve must be insulated with closed cell polymer insulation or similar (minimum thickness 9 mm) and the
insulation installed so as not to impede the operation of the valve. The insulation must be weatherproof and
UV resistant if exposed.
EXPANSION CONTROL VALVE
Local regulations may make it mandatory to install an expansion control valve (ECV) in the cold water line to
the water heater. In other areas, an ECV is required if the saturation index is greater than +0.4 (refer to
“Water Supplies” on page 16).
The expansion control valve must always be installed after the non return valve and be the last valve
installed prior to the water heater (refer to diagrams on page 42). A copper drain line must be fitted to the
expansion control valve (refer to "Relief Valve Drain" on page 45).
The valve must be insulated with closed cell polymer insulation or similar (minimum thickness 9 mm) and the
insulation installed so as not to impede the operation of the valve. The insulation must be weatherproof and
UV resistant if exposed.