Installation manual
28
EKHBH/X008BA
Indoor unit for air to water heat pump system
4PW54185-1B
[8] Domestic water heating mode timer
Applies only to installations with a domestic hot water tank.
The 'domestic water heating mode timer' field settings defines the
minimum and maximum domestic water heating times, minimum time
between two domestic water heating cycles by heat pump, and
booster heater delay time.
■
[8-00] Minimum running time: specifies the minimum time
period during which heat pump domestic water heating mode
should be activated, even when the target domestic hot water
temperature for heat pump (T
HP OFF
) has already been
reached.
■
[8-01] Maximum running time: specifies the maximum time
period during which heat pump domestic water heating mode
can be activated, even when the target domestic hot water
temperature for heat pump (T
HP OFF
) has not yet been
reached.
The actual maximum running time will automatically variate
between [8-01] and [8-01]+[8-04] depending on the outdoor
temperature. See figure in chapter
■
[8-02] Anti-recycling time: specifies the minimum required
interval between two heat pump domestic water heating
mode cycles.
The actual anti-recycling time will automatically variate
between [8-02] and 0 depending on the outdoor temperature.
See figure in chapter
.
■
[8-03] Booster heater delay time: specifies the start-up time
delay of the booster heater operation when heat pump
domestic water heating mode is active.
Note that when the unit is configured to work with a
room thermostat (refer to
installation configuration" on page
maximum running timer will only be taken into
account when there is a request for space heating
or space cooling. When there is no request for
space heating or space cooling, domestic water
heating by the heat pump will continue until the
'heat pump OFF temperature' (see field settings
on
) is reached. When no room thermostat
is installed, the timer is always taken into account.
1
Heat pump domestic water heating mode
(1 = active, 0 = not active)
2
Hot water request for heat pump (1 = request, 0 = no request)
t
Time
If the outdoor temperature is higher than the field setting to
which parameter [4-02] is set, then field settings of
parameters [8-01], [8-02], and [8-04] are not considered.
t
1
0
1
0
[8-01]
[8-02]
[8-00]
■
When heat pump is active in domestic water
heating mode, the delay time of booster
heater is [8-03].
■
When heat pump is not active in domestic
water heating mode, the delay time is 20 min.
■
The delay timer starts from booster heater ON
temperature (T
BH ON
)
1
Booster heater operation (1 = active, 0 = not active)
2
Heat pump domestic water heating mode
(1 = active, 0 = not active)
3
Hot water request for booster heater
(1 = request, 0 = no request)
4
Hot water request for heat pump (1 = request, 0 = no request)
t
Time
■
By adapting the booster heater delay time versus the
maximum running time, an optional balance can be
found between the energy efficiency and the heat up
time.
■
However, if the booster heater delay time is set too
high, it might take a long time before the domestic hot
water reaches its set temperature upon domestic hot
water mode request.
■
The purpose of [8-03] is to delay the booster heater in
relation with the heat pump operation time in domestic
water heating mode.
■
The setting [8-03] has only meaning if setting
[4-03]=1. Setting [4-03]=0/2/3 limits the booster
heater automatically in relation to heat pump
operation time in domestic water heating mode.
■
Take care that [8-03] is always in relation with the
maximum running time [8-01].
Example: [4-03]=1
t
1
0
1
0
1
0
[8-03]
3
4
1
0
Energy saving settings
Quick heating settings
(default)
[8-01]
20~60 min
30 min
[8-03]
[8-01] + 20 min
20 min
