Daikin EBHQ011BA6V3, Руководство по установке

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Installation manual
31
E(D/B)(H/L)Q011~0W1
Unit for air to water heat pump system
4PW57621-1A
■
[4-04] Freeze protection function: avoids freezing of the
water piping between home and unit. In case of low ambient
temperatures it will activate the pump and in case of low
water temperatures it will additionally activate the backup
heater.
Default freeze protection function takes into account freezing
of water piping which is insufficiently insulated.
Basically it means that the pump is activated whenever
ambient temperatures become close to freezing,
independently of the working temperature.
[5] Equilibrium temperature and space heating priority
temperature
Equilibrium temperature — The 'equilibrium temperature' field
settings apply to operation of the backup heater.
When the equilibrium temperature function is enabled, operation of
the backup heater is restricted to low outdoor temperatures, i.e. when
the outdoor temperature equals or drops below the specified
equilibrium temperature. When the function is disabled, operation of
the backup heater is possible at all outdoor temperatures. Enabling
this function reduces the working time of the backup heater.
■
[5-00] Equilibrium temperature status: specifies whether the
equilibrium temperature function is enabled (1) or
disabled (0).
■
[5-01] Equilibrium temperature: outdoor temperature below
which operation of the backup heater is allowed.
Space heating priority temperature
—
Applies only to installations
with a domestic hot water tank.
—
The 'space heating priority
temperature' field settings apply to operation of the 3-way valve and
the booster heater in the domestic hot water tank.
When the space heating priority function is enabled, it is assured that
the full capacity of the heat pump is used for space heating only
when the outdoor temperature equals or drops below the specified
space heating priority temperature, i.e. low outdoor temperature. In
this case the domestic hot water will only be heated by the booster
heater.
■
[5-02] Space heating priority status: specifies whether space
heating priority is enabled (1) or disabled (0).
■
[5-03] Space heating priority temperature: outdoor
temperature below which the domestic hot water will be
heated by the booster heater only, i.e. low outdoor
temperature.
■
[5-04] Set point correction for domestic hot water
temperature: set point correction for the desired domestic hot
water temperature, to be applied at low outdoor temperature
when space heating priority is enabled. The corrected
(higher) set point will make sure that the total heat capacity of
the water in the tank remains approximately unchanged, by
compensating for the colder bottom water layer of the tank
(because the heat exchanger coil is not operational) with a
warmer top layer.
If the booster heater operation is limited ([4-03]=0)
and the ambient outdoor temperature
T
A
is lower than
the field setting to which parameter [5-03] is set and
[5-02]=1, then the domestic hot water will not be
heated.
T
set
Domestic hot water set point temperature
T
U
User set point (as set on the user interface)
T
A
Ambient (outdoor) temperature
Space heating priority
WARNING
Be aware that the domestic hot water temperature will be
automatically increased with the value selected in field
setting [5-04] (if the outdoor temperature drops below field
setting [5-03]) compare to the user set point for domestic
hot water (T
U
). Refer to field setting [5-03], [7-00] and the
operation manual to select preferable set point.
If this high domestic hot water temperature can be a
potential risk for human injuries, a mixing valve (field
supply) shall be installed at the hot water outlet connection
of the domestic hot water tank. This mixing valve shall
secure that the hot water temperature at the hot water tap
never rise above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to local laws and regulations.
T
A
T
set
T
U
[5-03]
[5-04]