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9.6.
Simultaneous demand of space heating and
domestic water heating
Remote controller leaving water temperature control
When the reheat temperature is reached, the further heat up till
storage temperature of the domestic hot water tank will be decided by
the running timers which are programmed by the installer.
1
Reheat operation
When requesting space heating and domestic water heating
(reheat) at the same time, the domestic water will be heated till
maximum reheat temperature, then space heating will start
again.
ON
OFF
D
2
Storage operation
When requesting space heating and domestic water heating
(storage) at the same time, domestic water will be heated
according to running timer, then space heating will start again
according to running timer, then domestic water heating will start
again according to running timer, this will continue till storage set
point is reached.
ON
OFF
D
G 75°C
C
J
H
F 35°C
G 75°C
ON
OFF
B
J
C
A
H
F 35°C
3
2
ON
OFF
B
A
1
A
Operation
Space heating
A
Operation
Domestic water heating
Space heating
Domestic water heating
B
Domestic hot water reheat thermo-on request
C
Domestic hot water tank temperature
D
Leaving water thermo-on request
F
Domestic hot water lower limit temperature
G
Domestic hot water upper limit temperature
(maximum possible storage temperature) [b-03]
H
Domestic hot water reheat minimum temperature [b-00]
J
Domestic hot water reheat maximum temperature [b-01]
ON
ON
OFF
OFF
Installation manual
32
B
Domestic hot water storage thermo-on request
C
Domestic hot water tank temperature
D
Leaving water thermo-on request
F
Domestic hot water lower limit temperature
G
Domestic hot water upper limit temperature
(maximum possible storage temperature) [b-03]
H
Domestic hot water reheat minimum temperature [b-00]
J
Domestic hot water reheat maximum temperature [b-01]
ON
ON
OFF
OFF
1
Maximum operation time for domestic water heating
(initial 30 minutes [d-01])
2
Interval minimum stop time for domestic water heating
(initial 15 minutes [d-02])
3
Maximum operation time for domestic water heating
(initial 30 minutes [d-01])
HXHD125A7V1B
VRVIII system indoor unit
4PW62584-1A – 11.2010