Daikin Altherma 3 R F Installation Manual page 5

Electrical installation (see "6 Electrical
DANGER: RISK OF ELECTROCUTION
WARNING
Make sure that the electrical wiring does NOT touch the
refrigerant gas pipe, which can be very hot.
a Refrigerant gas pipe
WARNING
ALWAYS use multicore cable for power supply cables.
NOTICE
Do NOT cut or remove the backup heater power supply
cable.
CAUTION
To guarantee the unit is completely earthed, always
connect the backup heater power supply and the earth
cable.
WARNING
The backup heater MUST have a dedicated power supply
and MUST be protected by the safety devices required by
the applicable legislation.
NOTICE
Wiring is different for a NC (normally closed) valve and a
NO (normally open) valve.
NOTICE
Make sure to select and install the safety thermostat
according to the applicable legislation.
In any case, to prevent unnecessary tripping of the safety
thermostat, we recommend the following:
▪ The safety thermostat is automatically resettable.
▪ The safety thermostat has a maximum temperature
variation rate of 2°C/min.
▪ There is a minimum distance of 2 m between the safety
thermostat and the 3‑way valve.
NOTICE
A safety thermostat MUST be installed on the main zone to
avoid too high water temperatures in this zone. The safety
thermostat is typically a thermostatically controlled valve
with a normally closed contact. When the water
temperature in the main zone is too high, the contact will
open and the user interface will show a 8H‑02 error. ONLY
the main pump will stop.
Configuration (see "7 Configuration" [ 4 23])
NOTICE
This chapter explains only the basic configuration. For
more detailed explanation and background information,
see the installer reference guide.
EHVZ04+08S18+23EA6V+9W
Daikin Altherma 3 R F
4P629092-1A – 2020.08
installation" [ 4 13])
a
2 Specific installer safety instructions
NOTICE
An overpressure bypass valve can be integrated in the
system. Keep in mind that this valve might not be shown
on the illustrations.
NOTICE
NOT configuring the system in the following way can cause
damage to the heat emitters. If there are 2 zones, it is
important that in heating:
▪ the zone with the lowest water temperature is
configured as the main zone, and
▪ the zone with the highest water temperature is
configured as the additional zone.
NOTICE
If there are 2 zones and the emitter types are wrongly
configured, water of high temperature can be sent towards
a low temperature emitter (underfloor heating). To avoid
this:
▪ Install an aquastat/thermostatic valve to avoid too high
temperatures towards a low temperature emitter.
▪ Make sure you set the emitter types for the main zone
[2.7] and for the additional zone [3.7] correctly in
accordance with the connected emitter.
NOTICE
Average emitter temperature
temperature – (Delta T)/2
This means that for a same leaving water temperature
setpoint, the average emitter temperature of radiators is
lower than that of underfloor heating because of a bigger
delta T.
Example radiators: 40–10/2=35°C
Example underfloor heating: 40–5/2=37.5°C
To compensate, you can:
▪ Increase the weather-dependent
temperatures [2.5].
▪ Enable leaving water temperature modulation and
increase the maximum modulation [2.C].
NOTICE
If an external room thermostat is used, the external room
thermostat will control the room frost protection. However,
the room frost protection is only possible if [C.2] Space
heating/cooling=On.
Commissioning (see "8 Commissioning" [ 4 33])
NOTICE
General commissioning
commissioning instructions in this chapter, a general
commissioning checklist is also available on the Daikin
Business Portal (authentication required).
The general commissioning checklist is complementary to
the instructions in this chapter and can be used as a
guideline and reporting template during the commissioning
and hand-over to the user.
NOTICE
ALWAYS operate the unit with thermistors and/or pressure
sensors/switches. If NOT, burning of the compressor might
be the result.
= Leaving water
curve desired
checklist. Next to the
Installation manual
5