Raypak B0109, B0147 Connections Plumbing, Water Inlet and Outlet, GAS Inlet, Pipe Sizes

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

	109 On/Off	109 Hi/Lo	147 On/Off	147 Hi/Lo
Inlet water connection	RP1¼/32	RP1¼/32	RP1¼/32	RP1¼/32
Outlet water connection	RP1¼/32	RP1¼/32	RP1¼/32	RP1¼/32
Relief valve connection	RP½/15	RP½/15	RP¾/20	RP¾/20
Gas inlet	R¾/20	R¾/20	RP¾/20	RP½/15

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 at the right hand end of the water heater for 109 Models and at the inlet of the gas control for 147 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. 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 connection to the water heater. 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. The gas control casting may crack if the fittings are over tightened. Cracked castings are not covered under warranty. Damaged gas controls 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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