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8 Configuration
Installer reference guide
62
ERHQ+ERLQ011~016 + 16CBV
Daikin Altherma – Low temperature split
4P449970-1 – 2016.06
Under room thermostat control, room frost protection is guaranteed,
even if the room temperature home page is OFF on the user
interface. When room frost protection ([2‑06]) is enabled and the
room temperature drops below the room antifrost temperature
([2‑05]), the unit will supply leaving water to the heat emitters to heat
up the room again.
#
Code
Description
N/A
[2-06]
Room frost protection
▪ 0: disabled
▪ 1: enabled (default)
N/A
[2-05]
Room antifrost temperature
4°C~16°C (default: 16°C)
INFORMATION
If a U5 error occurs:
▪ when 1 user interface is connected, room frost
protection is NOT guaranteed,
▪ when 2 user interfaces are connected and the second
user interface used for room temperature control is
disconnected (due to miswiring, damage of the cable),
then room frost protection is NOT guaranteed.
NOTICE
If Emergency is set to Manual ([A.6.C]=0), and the unit is
triggered to start emergency operation, the user interface
will ask confirmation before starting. Room frost protection
is active even if the user does NOT confirm emergency
operation.
[C‑07]=1: external room thermostat control
Under external room thermostat control, room frost protection is
guaranteed by the external room thermostat, provided that the
leaving water temperature home page is ON on the user interface,
and the auto emergency setting ([A.6.C]) is set to "1".
Additionally, limited frost protection by the unit is possible:
In case of…
…then the following applies:
One leaving water temperature
zone
▪ When
the
leaving
water
temperature home page is
OFF and the outdoor ambient
temperature drops below 4°C,
then the unit will supply
leaving water to the heat
emitters to heat up the room
again, and the leaving water
temperature setpoint will be
lowered.
▪ When
the
leaving
water
temperature home page is ON,
the external room thermostat
is "Thermo OFF" and the
outdoor ambient temperature
drops below 4°C, then the unit
will supply leaving water to the
heat emitters to heat up the
room again and the leaving
water temperature setpoint will
be lowered.
▪ When
the
leaving
water
temperature home page is ON
and
the
external
room
thermostat is "Thermo ON",
then room frost protection is
guaranteed by the normal
logic.
In case of…
…then the following applies:
Two leaving water temperature
zones
▪ When
the
leaving
water
temperature home page is
OFF, and the outdoor ambient
temperature drops below 4°C,
then the unit will supply
leaving water to the heat
emitters to heat up the room
again, and the leaving water
temperature setpoint will be
lowered.
▪ When
the
leaving
water
temperature home page is ON,
the
operation
mode
is
"heating", and the outdoor
ambient temperature drops
below 4°C, then the unit will
supply leaving water to the
heat emitters to heat up the
room again, and the leaving
water temperature setpoint will
be lowered.
[C‑07]=0: leaving water temperature control
Under leaving water temperature control, room frost protection is
NOT guaranteed. However, if [2‑06] is set to "1", limited frost
protection by the unit is possible:
▪ When the leaving water temperature home page is OFF and the
outdoor ambient temperature drops below 4°C, then the unit will
supply leaving water to the heat emitters to heat up the room
again, and the leaving water temperature setpoint will be lowered.
▪ When the leaving water temperature home page is ON and the
operation mode is "heating", then the unit will supply leaving water
to the heat emitters to heat up the room according to normal logic.
Shut-off valve
The following is only applicable in case of 2 leaving water
temperature zones. In case of 1 leaving water temperature zone,
connect the shut-off valve to the heating output.
The shut-off valve, which is in the main leaving water temperature
zone, output is configurable.
INFORMATION
During defrost operation, the shut-off valve is ALWAYS
opened.
Thermo On/OFF: the valve closes, depending on [F-0B] when there
is no heating demand from the main zone. Enable this setting to:
▪ avoid leaving water supply to the heat emitters in the main LWT
zone (through the mixing valve station) when there is request from
the additional LWT zone.
▪ activate the On/OFF pump of the mixing valve station ONLY when
there is demand. See
"5 Application guidelines" on page 12
.
#
Code
Description
[A.3.1.1.6.1] [F-0B]
The shut-off valve:
▪ 0 (No)(default): is NOT influenced by
heating demand.
▪ 1 (Yes): closes when there is NO
heating demand.
INFORMATION
The setting [F‑0B] is only valid when there is a thermostat
or external room thermostat request setting (NOT in case
of leaving water temperature setting).