Service Center Solahart (081313462267) water heater | Page 28

33-1197 Solahart Owner‟s Manual – Thermosiphon Systems - Revision H – Nov 2013

26

OPEN CIRCUIT DIRECT SYSTEMS – THERMOSIPHON RESTRICTOR VALVE (TRV)

A Thermosiphon Restrictor Valve (TRV) is available for use on an open circuit direct system to assist with over
temperature protection of the system. The TRV locates in the top end of the cold pipe assembly. A non-standard cold pipe
arrangement is required to accommodate the TRV.
In Australia, a TRV must be used on a new installation of a 222, 303, 443 system regardless of the type of collector
installed and on a 302 system installed with LCS collectors.
When assembling the cold pipe, ensure:
A Silicone Rubber Washer is used between the flared pipe ends and each end of the TRV.
The TRV is to be orientated with the copper element probe facing upward toward the tank. The TRV has an arrow and
the word „FLOW‟ stamped on the outside of the body. The arrow is to point upwards in the direction of the tank.
If this pipe assembly is being retrospectively fitted to an existing system, replace existing O-Rings with the new ones
to seal cold pipe to the tank/collector and extension pipe (if any).
Cold Water Inlet
Cold Pipe Assy
TRV Upper

33-0171
(O-Ring)

34-4391 (TRV)
The arrow stamped on the
TRV body is to point
toward the tank

Cold Pipe Assy
TRV Lower

To Tank Inlet
(Or Extension Pipe)

34-5096
(Silicone Rubber Washer)

CAUTION!
DO NOT OVERTIGHTEN FITTINGS.
HANDTIGHTEN, THEN ADD HALF TURN
ONLY WITH SPANNER, OTHERWISE
DAMAGE TO WASHER MAY OCCUR.

Thermosiphon Restrictor Valve (TRV) Assembly