6
7
Header,
Buffer or
Heat
Exchanger
Pump Z1
Z1
Z2
The 3 port valve MUST go
A to DHW and B to Heating
Flow & Return
at Heat Pump
Return from
Header
Return from
Heating
Flow out of
Header
Flow into
Header
Handover of the System
Hitachi Warranty Registration 7 Year
Heating Mode Commissioning Data
It is useful to take these measurements at commissioning and testing. They are for your own records, they are not needed to register
the unit for warranty.
What type of system do you have?
Pre-plumbed / Separate Cylinder
Is there a Header, Buffer or Heat Exchanger installed?
Measure the following and record the data:
Flow temperature at Heat Pump
Measure with pipe thermometer
Return temperature at Heat Pump
Flow temp into header / plate
Return from header / plate
Flow temp out of header /
plate to heating
Return from Heating into
header / plate
Flow rate from flow meter
Air temp at the back of the unit
Ambient air temperature
Measure from the garden
Hot water cylinder model No.
Cylinder water temp at start-up
Measure from the remote controller
Cylinder water temp after 30mins
Measure from the remote controller
Water flow temp at cylinder
Measure with pipe thermometer
Water return temp at cylinder
Measure with pipe thermometer
Flow Rate
Measure from the flow meter
Hot Water Mode Commissioning Data
You must be running the heat pump in hot water mode for this section
Leave these 5 pages with the Homeowner.
Search Freedom heat pumps, Handover video for Hitachi heat pump on YouTube
Thank you for buying an Hitachi heat pump system, your Hitachi heat pump heats the house and hot water cylinder much like a
normal fossil fuel boiler, however there are a couple of differences which you should take notice of.
Your installer should have provided you with a room thermostat if you have radiators or a thermostat in every room if you have under
floor heating. They will tell you how to use these stats. The heat pump will run when it gets a run signal from the thermostat. It is not
controlled by the Hitachi remote controller.
To turn on the heating all you need to do is turn up the thermostats, to turn it off you need to turn them down. The thermostat sends
a run signal to the heat pump. Once the unit starts up it will take time to get to temperature, it is not instant. Within 10 minutes you
should feel the radiators beginning to warm up
Weather compensation
The radiator temperatures will be lower than you are used to with a gas or oil boiler. To add to this, we run them in a weather
compensation mode, this means that the unit measures the outside temperature and adjusts the radiator temperature to suit.
The colder it is outside the warmer the rads will be and vice versa. This function is automatic and is designed to save you money. In
very cold weather the radiator will be at their hottest, they will reach 50°C, its possible to get to 80°C if you have an HT system.
Running your machine efficiently
It is very expensive to heat the house up from cold, with a heat pump the best advice is to maintain the house at as close to constant
temperature as possible all the time.
Please DON’T set the room temperature too low when you leave the house, ideally drop it 2 degrees below your normal set
temperature when you go out or it will take a long time and a lot of money to recover.
To switch off the heating in summer set the thermostats down to 16°C to avoid the heating starting up.
Your radiators will have thermostatic valves on them, you can adjust each room’s temperature with these.
Water temp in weather comp mode
Ambient temperature °C
Fl
ow t
emper
atur
e °C
-5
35
55
50
45
40
0
5
10
15
