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Service setting manual
ENG
HEAT PUMP
Control of heat pump by schemes 122, 122b, 122c and 122d
The heat pump (HP) has 2 operation modes, depending on parameter S6.14 setting:
- S6.14 = 1 - HP is activated whenever there is a demand for heating and remains switched
on for all the time. If outdoor temperature drops below the limit outdoor temperature, set
with parameter S6.17, HP is switched off.
- S6.14 = 2 - HP heat pump is controlled according to the outdoor temperature and main-
tains the calculated heat accumulator temperature. Max. operation temperature of HP is
limited with parameter S6.15. If outdoor temperature drops below limit outdoor temperature
set with parameter S6.11, HP is switched off.
PUMP FOR RETURN-PIPE TEMPERATURE INCREASE (BYPASS PUMP)
This option is available for classic liquid fuel boilers and solid fuel boilers with no con-
nection to heat accumulator. Circulation pump output (R6 or R7) can be used to control
the bypass pump to increase boiler return temperature. Such operation mode is set with
parameter S4.9=4. Install the T1 or T8 sensor in the boiler return-pipe before the bypass
connection and set parameter S1.4=11 (for sensor T1) or S1.5=12 (for sensor T8). If
return-pipe temperature drops below the temperature set by parameter S5.14, the pump is
switched on.
DOMESTIC HOT WATER
D. h. w. warming with liquid fuel boiler
Set the required d. h. w. temperature for the inactive time program interval with parameter
P4. If boiler temperature exceeds the maximum boiler temperature (parameter S5.1), the d.
h. w. will be warmed up to the maximum temperature set with parameter S4.3.
D. h. w. warming pump is switched off with delay. The delay time is set with parameter
S4.12.
D. h. w. warming with solid fuel boiler
When a solid fuel boiler is in operation, the d. h. w. is warmed to the required temperature
(parameter S4.10) independent of the time program.
If solid fuel boiler temperature exceeds the maximum boiler temperature - parameter
S5.13, the maximum allowed d. h. w. temperature (parameter S4.3) is set for required d .h.
w. temperature.
D. h. w. warming in storage tank with integrated heat pump
In this case, a special operation mode of d. h. w. control is activated by setting the param-
eter. S1.4=10 (for sensor T1) or S1.5=11 (for sensor T8). Install a room sensor in the room,
where the heat pump is located, and connect it to the T1 or T8 terminals. Controller will
block the d. h. w. warming with boiler if the heat pump room temperature is higher as set
with parameter S4.11.
