Daikin Altherm EHVH04S18DA, User Reference Manual

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4 Operation
User reference guide
8
EHBH/X04+08DA + EHVH/X04+08S18+23DA
Daikin Altherma – Low temperature split
4P495250-1 – 2017.12
If… Then…
Two heat emitter symbols are displayed There are two zones.
To determine the control type
Check the room thermostat type of the main zone:
If… Then the main zone temperature control is…
Room thermostat control
External room thermostat control
No icon Leaving water temperature control
4.4.4 To change the desired room temperature
During room temperature control, you can use the room temperature
setpoint screen to read out and adjust the desired room temperature.
1 Go to [1]: Room.
You can read out the desired and actual room
temperature in the center of the setpoint screen.
2 Adjust the desired room temperature.
If scheduling is on after changing the desired room temperature
▪ The temperature will stay the same as long as there is no
scheduled action.
▪ The desired room temperature will return to its scheduled value
whenever a scheduled action occurs.
You can avoid scheduled behaviour by (temporarily) turning off
scheduling.
To turn off room temperature scheduling
1 Go to [1.1]: Room > Schedule.
2 Select No.
4.4.5 To change the desired leaving water
temperature
INFORMATION
The leaving water is the water that is sent to the heat
emitters. The desired leaving water temperature is set by
your installer in accordance with the heat emitter type.
Only adjust the leaving water temperature settings in case
of problems.
You can use the leaving water temperature setpoint screen to read
out and adjust the desired leaving water temperature.
1 Go to [2]: Main zone or [3]: Additional zone.
You can read out the desired and actual leaving
water temperature in the center of the setpoint
screen.
2 Adjust the desired leaving water temperature.
If scheduling is on after changing the desired leaving water
temperature
▪ The temperature will stay the same as long as there is no
scheduled action.
▪ The desired leaving water temperature will return to its scheduled
value whenever a scheduled action occurs.
You can avoid scheduled behaviour by (temporarily) turning off
scheduling.
To turn off leaving water temperature scheduling
1 Go to one of the following:
▪ [2.1]: Main zone > Schedule
▪ [3.1]: Additional zone > Schedule
2 Select No.
To enable weather dependent operation for the leaving water
temperature
See "4.8 Weather dependent operation" on page 13 .
4.5 Domestic hot water control
4.5.1 About domestic hot water control
Depending on the DHW tank mode (installer setting), you use a
different domestic hot water control:
▪ Reheat only
▪ Sc reheat
▪ Schedule only
CAUTION
The booster heater permission schedule is used to restrict
or allow booster heater operation based on a weekly
program. Advice: In order to avoid unsuccessful
disinfection function, at least allow the booster heater (by
the weekly program) for minimum 4 hours starting from the
scheduled start-up of disinfection. If the booster heater is
restricted during disinfection, this function will NOT be
successful and the applicable warning AH will be
generated.
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Reheat only or Schedule + reheat mode is
selected, it is recommended to program the start-up of
the disinfection function at least 4 hours later than the
last expected large hot water tapping. This start-up can
be set by installer settings (disinfection function).
▪ When the Schedule only mode is selected, it is
recommended to program a Eco action 3 hours before
the scheduled start-up of the disinfection function to
preheat the tank.
To determine which domestic hot water mode you are using
(method 1)
Check the installer settings table filled in by the installer.
To determine which domestic hot water mode you are using
(method 2)
1 Go to [5]: Tank.
2 Check which items are displayed:
If… is displayed Then the DHW tank mode =…
Only [5.1] Powerful
operation Reheat only
All items except [5.4]
Reheat setpoint are
displayed Schedule only
All items including [5.4]
Reheat setpoint are
displayed Sc reheat
4.5.2 Reheat mode
In reheat mode the DHW tank continuously heats up to the
temperature shown on the home screen (example: 50°C).