Heat Production; Domestic Hot Water; Standby Mode - Nibe FIGHTER 1220 Installation And Maintenance Instructions Manual

For Home Owners
8
Heating
The supply of heat to the house is regulated in accor-
dance with the chosen setting of the regulating curve
(curve slope and offset). After adjustment, the correct
amount of heat for the outside temperature is sup-
plied. The heat pump's flow temperature (menu 2.0)
will hover around the theoretical required value (the
value in brackets on the display). For subnormal tem-
peratures the computer calculates a deficit in the form
of degree minutes, which results in the acceleration of
heat production. The larger the subnormal tempera-
ture, the greater the heat production.
There are four stages to heat production, one for the
heat pump and three for the electrical module. The
output of the electrical module as supplied is
6 kW, but it can be rewired to give 9 kW.

Standby mode

In order to produce heat when the collector circuit is
disconnected, or during servicing, the heat pump can
be set to standby mode, in which case heat is pro-
duced only by the immersion heater. Hot water is not
produced in standby mode. The compressor and heat
transfer system are then shutoff and only the heat
medium circuit and the immersion heater are active.
The temperature is controlled by the thermostat (3).
To select standby mode, set the switch (8) to "
In standby mode the output is 4 kW, reconnectable to
6 kW
3
Room temperature
When there is a demand for hot water, the heat pump
gives this priority and devotes its entire output to
water heating. No room heat is produced in this
mode. Maximum time for hot water charging is
adjustable using menu 1.3. Heating is then produced
for the remainder of the time, which is adjustable from
menu 1.2, before any further hot water charging can
take place.
If the electrical module is connected for heat produc-
tion before hot water charging, one stage remains
operative during hot water operation. Hot water
charging starts when the hot water sensor has fallen
to the set start temperature (25 — 50 °C), adjustable
on menu 1.4. Hot water charging stops when the
water temperature has reached (30 — 58 °C),
adjustable on menu 1.5. Charging is also possible
when the heat pump has reached its stop level for
heating mode at the same time as less than 2 °C
remains to the hot water start. The purpose of this is
to minimise the number of starts.
NOTE! The indicated hot water temperature is mea-
sured on the lower part of the water heater jacket.
This means that it is not the exact temperature of the
hot water. Usually the outgoing hot water is hotter
than the indicated temperature.
For occasional higher demand for hot water, the Extra
".
hot water function can be used to raise the tempera-
ture to about 70 °C for 3 —24 hours (press the Extra
hot water button once). When the electrical module is
connected for extra hot water the compressor stops.
The value is adjustable between 50 — 65 °C from
menu 1.7.
FIGHTER 1220
Hot water