Parameters for solid fuel boiler B
If a solid fuel boiler is combined in system, you can set the
Max. temp. switching off boiler pump
(as shown below left).
Possible range lays in
. This parameter prevents the tank from over heating and excessive
pressure.
The second parameter is
Min. temp. switching on boiler pump
(as shown below right). Here the setting temperature refers to
boiler outlet water temperature T4 (range 30-60
°
C, factory setting 45
°
C).
10-85
°
C (factory setting 65
°
C)
The next is
Difference in temp. switch boiler pump on.
Factory setting is
. This
parameter refers to the temperature difference between T4 and T3 ( the temperature of boiler coil in the tank) or T4 and T2 (
only in scheme 8, when the boiler coil is mounted top in tank and operate upon top tank temperature).
The boiler pump starts only when all of the above three conditions are satisfied.
The last parameter is
Solid fuel boiler priority
(as shown below right). If you choose YES, then priority is given to solid fuel boiler
over all the other devices (including heat pump, electrical heater, automatic boiler). When the above conditions are met to turn
on solid fuel boiler, all the other devices will be turned off. This option is to achieve the highest heating efficiency with the
lowest cost.
8
°
C (possible range for setting is 5-15
°
C)
Parameters of gas boiler D:
The settings in this section apply to gas boiler or any other type automatic boiler. The first parameter is
Max. temp. switching
off boiler,
which is similar as in section
Parameters of solid fuel boiler B
. It falls into function whenever heat pump is blocked by
alarm or disabled manually. In case of parallel operation of gas boiler together with heat pump (the next parameter
Block
boiler when heat pump switched on
is set as NO), gas boiler will work till the water is heated to this value, which equal to
Tap
water temperature heated by heat pump
minus
hysteresis temp. switch heat pump on
. For example, if the
Tap water
temperature heated by heat pump
is set as 50
°
C, and the
hysteresis temp. switch heat pump on
is 5
°
C, then the desired water
temperature for gas boiler heating is 45
°
C. When water temperature in the tank falles to below 45
°
C, heat pump and gas
boiler will be activated for heating, gas boiler will work to 45
°
C, and heat pump will continue heating till water is heated to
50
°
C. It is another possibility to realize PARTY mode - when there is larger demand for hot water, gas boiler will be enabled as
parallel heating source.
12
o
Max. temp. C
switched off
boiler pump
Solid fuel boiler B:
65
o
Min. temp. C
switching on
boiler pump
Solid fuel boiler B:
45
o
Difference in C
temp. switch
boiler pump on
Solid fuel boiler B:
8
Solid fuel
boiler
priority
Solid fuel boiler B:
TAK
o
Max. temp. C
switching off
boiler
Gas boiler D:
65
Block boiler
when heat
pump switched on
Gas boiler D:
TAK
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW
