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8 Configuration

Installer reference guide

ERGA04~08DAV3(A) + 08S18+23DA

Daikin Altherma – Low temperature split

4P495249-1 – 2017.12

NOTICE

The  maximum  setpoint  in  space  heating  depends  on  the
emitter  type  as  can  be  seen  in  above  table.  If  there  are  2
water  temperature  zones,  then  the  maximum  setpoint  is
the maximum of the 2 zones.

CAUTION

If  there  are  2  zones,  it  is  important  that  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.  Not  configuring  the
system  in  this  way  could  cause  damage  to  the  heat
emitters.

CAUTION

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.

INFORMATION

Depending  on  the  target  delta  T,  the  average  emitter
temperature  will  vary.  To  counteract  the  effect  on  the
average emitter temperature due to a higher delta T target,
the  leaving  water  setpoint  (fixed  or  weather  dependent)
can be adjusted.

Setpoint range

You can limit the range of the leaving water temperature for the main
leaving water temperature zone. The purpose of this setting is to
prevent a wrong (i.e. too hot or too cold) leaving water temperature.
Therefore, the available desired heating temperature range can be
configured.

NOTICE

In case of a floor heating application it is important to limit
the maximum leaving water temperature at heating
operation according to the specifications of the floor
heating installation.

INFORMATION

Only  for  EHVZ:  If  the  indoor  unit  is  connected  to  a  high
temperature  emitter  system,  and  simultaneous  demand
exists on both emitter zones, and if the high emitter system
leaving  water  setpoint  is  chosen  bigger  than  60°C  in  the
complete  operation  range,  there  can  be  an  increased
power consumption.

NOTICE

▪ When adjusting the leaving water temperature ranges,

all desired leaving water temperatures are also
adjusted to guarantee they are between the limits.

▪ Always balance between the desired leaving water

temperature  with  the  desired  room  temperature  and/or
the  capacity  (according  to  the  design  and  selection  of
the  heat  emitters).  The  desired  leaving  water
temperature  is  the  result  of  several  settings  (preset
values,  shift  values,  weather  dependent  curves,
modulation).  As  a  result,  too  high  or  too  low  leaving
water  temperatures  could  occur  which  lead  to
overtemperatures  or  capacity  shortage.  By  limiting  the
leaving  water  temperature  range  to  adequate  values
(depending on the heat emitter), such situations can be
avoided.

Example:

Set the minimum leaving water temperature to 28°C to

avoid NOT to be able to heat up the room: leaving water
temperatures MUST be sufficiently higher than the room
temperatures (in heating).

Code

Description

Leaving water temperature range for the main leaving water
temperature zone (= the leaving water temperature zone with the
lowest leaving water temperature in heating operation)

[2.8.1]

[9-01]

Heating minimum 15°C~37°C

[2.8.2]

[9-00]

Heating maximum

▪ [2‑0C]=2 (emitter type main zone =

radiator)
37°C~65°C

▪ Otherwise: 37°C~55°C

Control

For the control of the unit there are 3 possibilities:

Control