Raypak B0200, Owner'S Manual

Page: 17 / 40

17
CONNECTIONS – PLUMBING
IMPORTANT: When installing a new water heater to an old or existing system, it is a requirement that the system
and its equipment be thoroughly inspected and if necessary, drained and flushed with clean fresh water, before the
new water heater is connected. Failure to do this may cause blockages and/or damage to the water heater which is
not covered by warranty.
IF THERE IS ANY DOUBT ABOUT THE SYSTEM, DRAIN AND FLUSH AS A PRECAUTION.
CONNECTION SIZES
Inlet water connection: RC1½/40
Outlet water connection: RC1½/40
Relief valve connection: RC¾/20
Gas inlet (On/Off Models): RC¾/20
Gas Inlet (Modulating Models: RC1/25
All plumbing work must be carried out by a qualified person and in accordance with the National Plumbing
Standard AS/NZS 3500.4 and local authority requirements.
All gas work must be carried out by a qualified person and in accordance with the Australian Gas Installations
Standard AS 5601 and local authority requirements.
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before connection and purged before attempting to operate the
water heater. All olive compression fittings must use brass or copper olives. Use thread sealing tape or approved
thread sealant on all fittings.
An isolation valve and non-return valve must be installed on the cold water
line to the water heating system. An acceptable arrangement is shown in the
diagram opposite for a water heating application.
A disconnection union must always be provided at the inlet and outlet on the
water heater to allow for disconnection of the water heater.
Do not reduce the pipe work size and water heater water connections without
allowing for friction loss which will occur. Low water flow will cause damage to
the water heater and system components.
GAS INLET
The gas connection is made to the inlet of the gas control (On/Off Models) or pressure regulator (Modulating
Models). The pipe work must be cleared of foreign matter before connection and purged before attempting to light
the water heater. An isolation valve and disconnection union must be used to allow servicing and removal of the
water heater.
Refer to the Gas Installations Standard AS 5601 for the correct method of sizing the gas supply pipe to the water
heater.
WARNING: Before pressure testing the gas supply system always isolate and disconnect the water heater after
the isolating cock to prevent the risk of serious damage to the gas control or pressure regulator. Warranty does not
cover damage of any nature resulting from failure to observe this precaution. Refer to rating label for gas types and
pressures.
Ensure the gas line is also purged at the union to the gas control or pressure regulator. If this procedure is not
followed, a retry lockout may result on initial start up.
CAUTION: Care is necessary when tightening fittings into the gas control or pressure regulator. The gas control or
pressure regulator casting may crack if the fittings are over tightened. Cracked castings are not covered under
warranty. Damaged gas controls and pressure regulators must be replaced.
PIPE SIZES
The pipe sizing for water heating and mechanical heating 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.
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