Menu selection Meaning Factory setting
SHUNT TIME Time in seconds. Indicates how often the shunt is to adjust its
opening.
60S
(range: 10S / 99S
SHUNT COOLING The cooling shunt works towards the set temperature. 18°C
(range: 0°C / 30°C)
9.3 Sub-menu AUX. HEATER
Table 19. Used to change the heat pump stages’ operating settings.
Menu selection Meaning Factory setting
MAX STEP
Maximum number of permitted steps for auxiliary heating. = no
auxiliary heating permitted (Means that only AUTO or HEAT PUMP
can be selected.)
(range: , 1, 2, 3, 4, 5, +4,
+5)
INTEGRAL A2 Two conditions must be fulfilled in order to start the auxiliary heater:
the integral’s value to start must be less than integral A2, and the
supply temperature must be 2°C lower than the calculated tempera-
ture. See Important parametersfor more information.
-600
(range: -50 / -990)
HYSTERESIS If the difference between the actual supply temperature and the cal-
culated supply temperature is too great (see Important parameters),
either the integral value is set to start value A2 (starts the auxiliary
heater) or to 0 (stops the auxiliary heater ).
20°C
(range: 5°C / 30°C)
MAX CURRENT Refers to main fuse in the unit, in amperes 20
(range: 16 / 35)
HOT WATER STOP Stop temperature for hot water during AUX. HEATER. The value is
read off by the hot water sensor.
60°C
(range: 50°C / 65°C)
DELAY AFTER EVU Time in minutes. Indicates how many minutes after EVU are to pass
before the auxiliary heater may be activated.
30M
(range: 0M / 120M)
EXT.AUX.HEATER
Menu selection Meaning
EXT.AUX.HEATER Indicates whether an external
auxiliary heater is installed in the
system.
/ ON
INTEGRAL A3 Indicates the value of the integral
when external auxiliary heater is
connected.
-300
(range: -990 / INTEGRAL A1
- 10)
TURN OFF DELAY Indicates how long the external
auxiliary heater must continue to
be active after its demand is no
longer needed.
0M
(range: 0M / 180M)
REV.V. HOT WATER Indicates whether the exchange
valve for hot water is located
before or after the external auxili-
ary heater. (Determines whether
the external auxiliary heater may
produce hot water.)
INT / EXT
TOPH. AUX Indicates whether the external
auxiliary heater can be used for
anti-legionella. The exchange
valve must be positioned after
the external auxiliary heater.
/ ON
Installation instructions VMBMA1002 – 55
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