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VWZ AI /6 MB2 – Heat pump interface
MEH 97 – Hydraulic sta
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on
uniTOWER – Hydraulic sta
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on
Commissioning technical guide - for use with sensoCOMFORT
VRC720 controller
Step 1 – completing the start-up assistants – below appliance(s)
first
Always complete the start-up assistants on the appliance(s) first.
The start-up assistants differ slightly, however the MEH 97 and uniTOWER are the same electronics.
Questions on start-up assistant
Recommended setting
Guidance
System control available
Yes
Referring to whether a VRC700 or
sensoCOMFORT has been installed
Immersion heater power supply
230-400v
Set power supply of immersion heater
in MEH 97/uniTOWER (not applicable if
using VWZ AI /6 MB2)
Immersion heater output range
1-9kw or external
Set output of immersion heater in
MEH 97/uniTOWER (not applicable if
using VWZ AI /6 MB2)
Cooling technology
No
Unless system is designed for cooling
and coding resistor has been fitted
Compressor current limit
5-7KW unit = 13-16A
10 -12KW unit = 20-25A
You can reduce the current draw of
the outdoor unit depending on the
electricity supplier. A reduction in cur-
rent will reduce compressor output.
MO relay
None, fault signal, ext immersion heat
-
er, DHW 3 way valve
Relates to X14 on MEH 97/uniTOWER
Intermediate heat exchanger
Yes, no
uniTOWER ONLY. there is an accessory
to fit a plate heat exchanger within
the uniTOWER. Set to yes if fitted.
Purge building circuit
Yes
We recommend running a purge pro
-
gramme for at least 15 mins to ensure
the system is clear of any air. There
are air vents which needs opening
inside the MEH 97/uniTOWER. Failure
to do so can result in F1100 fault.
Contact details
Installer contact details to prompt the
customer on who to call in the event
of an issue with the heat pump
Finish installation assistant
Содержание UK aroTHERM plus
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