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2.3 MOUNTING THE HEAT INTERFACE UNIT
1.
Ensure the plastic plugs are removed from both the
Primary and DHW connections before mounting the HIU.
Note: HIU may contain residual water.
2.
Indirect only
a.
Isolate the incoming cold water mains prior to the HIU.
b.
Ensure isolation valves are in the closed position (handles
horizontal).
c.
Remove brass plugs from the top of the isolation valves (if
used). Discard any used gaskets.
2.4 CONNECTIONS
With the appliance in place, insert a G3/4 fibre
gasket between the top of each isolation valve
and the appliance connection. Tighten each nut to
16.6Nm.
NOTES.
Ensure all connection blanking plugs are removed
before connecting hardware. Each valve must be
fitted to the correct connection as shown in the
picture.
Ensure each union is fitted with fibre seals provided.
Do not subject any of the isolating valves to heat
other than normal operation as the seals may be
damaged.
16
SECTION 2 - INSTALLATION
4.
5.
Flow Regulator
Flow Rate / Colour
Housing / Colour
12.3 l/min / natural /
orange
16.4 l/min / natural /
green
20.5 l/min / natural /
yellow
27.0 l/min / natural /
natural
28.7 l/min / natural /
dark grey
Lift the HIU onto the wall mounting plate (refer to the
Introduction section for safe handling advice), locating it
over the two tabs. The HIU unit will need to be lifted clear
of lower bracket connections to sit flush.
Install 2 x HIU securing screws from underneath of
bracket.
Flow Tolerance
Deviations
Core
+10%
10
10
10
10
10
Power
Pressure
Rating
Range
-10%
(bar)
kW
10
1 - 10
30
10
1 - 10
40
10
1 - 10
50
10
1.5 - 10
60
10
1.5 - 10
70
Continued....
Installation and Servicing
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