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How To Wire The Electric Meters
It is now a requirement to measure the electricity being used by the heat pump so the end user can see what the unit costs to run.
We provide a Smart Process electric meter with every unit. Ideally it should measure the total draw for the heat pump (outdoor and
indoor unit combined). The outdoor unit takes most of the current so in many installations it will only be used to measure the outdoor
unit.
Neutral fom
mains and out
to heat pump
Live to heat pump
Live from mains
Special systems and extra settings
Backup boilers and Hybrids
The Hitachi unit can send a run signal to an external boiler if
required.
A relay links terminals 37 and 38 to run the boiler.
Take a live from the boiler into 37 and the run to the boiler in 38.
If no live is available link 33 (permanent live) to 37.
On Hybrid systems, Set up boiler parameters :
1.
Menu
2.
System configuration, press OK.
3.
Complimentary heating, press OK.
4.
Automatically populates Heating source (Monobloc will say
“HP+Boiler”, Splits and combi will say “HP+EH+Boiler”)
5.
Boiler combination, press OK.
6.
Adjust Bivalent point to your desired bivalent point or 3°C
7.
Combination mode: Parallel
8.
Waiting time: 5 min
In this config, the boiler will run IF the ambient is below the Bi
Valent point, the heat pump will not run below the bi valent point.
The boiler can run at high temperatures.
On boiler backup systems, Set up boiler parameters:
1.
Menu
2.
System configuration, press ok.
3.
Complimentary heating, press ok.
4.
Automatically populates Heating source (Monobloc will say
“HP+Boiler”, Splits and combi will say “HP+EH+Boiler”)
5.
Boiler combination, ok
6.
Adjust Bivalent point to your desired bivalent point 3°C
7.
Combination mode: Serial
8.
Waiting time: 5 min
In this config, the boiler will only run IF the ambient is below the Bi
Valent point, and the heat pump is struggling, Both the heat pump
and boiler will run together. You must set the boiler to run at only
55°C.
