Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 16

The cold water combination valve can be connected anywhere on the cold water mains
supply prior to the Electromax Solar. Whilst it is often more convenient to do so, there is no
requirement to site the valve close to the Electromax Solar, it can be located at a point remote
from the Electromax Solar if this is more convenient. However, ensure the discharge from the
expansion relief valve can be correctly installed. The expansion relief valve connection must
not be used for any other purpose
The cold water combination valve is installed as a complete one-piece unit. The valve
incorporates an isolating valve, a pressure reducer, a strainer, an expansion relief valve and
a single check valve. The cold water combination valve can be fitted in any orientation to
suit the installation, however, ensure the valve is installed with the direction of flow arrows
(stamped on the side of the brass body) pointing towards the Electromax Solar.
NOTE: No other valve should be fitted between the Cold Water Combination Valve and the
Electromax Solar cold inlet.
3.4.4 BALANCED COLD WATER SUPPLIES
It is advantageous in many mixer showers or taps to have balanced hot and cold water
pressure. In these instances the balanced cold water supply should be teed off the supply to
the Electromax Solar immediately after the cold water combination valve.
Branches to cold outlets where drinking water may be drawn should be taken directly from
the main supply before the Cold Water Combination Valve to avoid the possibility of warm
expanded water being drawn from cold taps.
3.4.5 CONNECTION TO HOT WATER OUTLET
Connection to the hot water outlet can be from underneath the Electromax Solar or through
knock out panels at the front, bottom right hand side. Connection is made by 22mm
compression fitting.
Solder connections directly to the unit must not be made as the heat may damage the
Electromax Solar insulation material. Damage caused by heat applied to solder fittings in
close proximity to the unit will not be covered by the warranty.
3.4.6 SOLAR THERMOSTATIC MIXING VALVE
It is recomended that hot water outlets are supplied via a solar rated thermostatic mixing valve
(supplied with the Heatrae Sadia Electromax Solar Colelctor kits).
The solar rated thermostatic mixer valve is connected as follows:
• Inlet marked 'HOT' connected to Electrommax Solar hot outlet
• Inlet marked 'COLD' connected to balanced cold water supply
• Outlet marked 'MIX' connected to hot water outlets
Connections are made by 22mm compression fittings.
The pipework from the thermostatic mixing valve to the hot outlet fittings should be in 22mm
pipe with short runs of 15mm pipe to showers and basins. Small bore pipe can be used to
suit some taps, but runs should be kept as short as possible. Pipe sizes may vary due to
system design.
16