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Installation and Servicing
SECTION 2 - INSTALLATION
After initial power-up of the HIU the controls will initialise and display information about unit type and power output.
The rst screen will show the HIU type as ‘II’ (Indirect/Indirect), or ‘dl’ (direct/Indirect). The second screen will
show the DHW output (30kW, 40kW, 50kW, 60kW or 70kW). The HIU controls can now be used to electronically
open / close the primary control valves to allow for commissioning and balancing of the primary network and the
commissioning engineer can input all the relevant parameters to provide efcient operation of the HIU and the Heat
Network.
A
B C
D
E
G
Electrical Installation
1. Checks to ensure electrical safety should be carried out by
a competent person.
2. ALWAYS carry out the preliminary electrical system checks,
i.e. earth continuity, polarity, resistance to earth and short
circuit, using a suitable test meter.
ATTENTION !
IT IS A CONDITION OF THE MANUFACTURER’S WARRANTY THAT THE
COMMISSIONING CHECKLIST IS FULLY COMPLETED
AND LEFT WITH THE APPLIANCE
2.10 EXTERNAL WIRING
2.11 INITIAL OPERATION & POWER UP
Legend
A. Reset Button
B. - Function Button
C. + Function Button
D. Menu Button
E. HIU Status Display
F. CH System Pressure Gauge
(Indirect Only)
G. Heat Meter (Optional)
INSTALLATION
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