Bleed Valve Drain; Expansion Control Valve (Ecv); Gas Inlet - Rheem Water Heater User Manual

CONNECTIONS – PLUMBING

BLEED VALVE DRAIN

A copper drain line must be fitted to the bleed valve to carry the discharge clear
of the water heater and solar controls. Connect the drain line to the bleed valve
using a disconnection union. The pipe work from the bleed valve to the drain
should be as short as possible and fall all the way from the valve with no
restrictions. It should have no more than three right angle bends in it. Use
DN15 pipe.
The outlet of the drain line must be in such a position that flow out of the pipe
can be easily seen (refer to AS/NZS 3500.4) - but arranged so water discharge
will not cause injury, damage, nuisance or splashing. The water discharged
may be of a high temperature under certain conditions. The drain line must be
fully insulated with closed cell polymer insulation or similar (minimum thickness
13 mm). 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 not
required unless the saturation index is greater than +0.4 (refer to "Water
Supplies" on page 56). However, an ECV may be needed in a corrosive water
area where there are sufficient quantities of silica dissolved in the water.
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 40). A copper drain line must be run separately from the drain of the relief
valve.

GAS INLET

The gas connection is made through the grommet in the left hand side panel to
the gas control. 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 solar storage tank. Refer to the Gas Installations Standard AS 5601 for the
correct pipe sizing.
Warning: Always isolate the water heater before pressure testing the gas
supply system. 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.
Caution: Care is necessary when tightening fittings into the gas valve. The gas
valve casting may crack if the fittings are over tightened. Cracked valve
castings are not covered under warranty. Damaged valves must be replaced.
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