Additional Functions; Active Cooling; Power-Off - Wolf BWL-1S-05 Installation And Operating Instructions Manual

30 Additional functions
30.1 Active cooling
The split air/water heat pump can, in addition to heating/DHW mode, also work in active cooling mode.
During active cooling, the cooling capacity of the heat pump is transferred to the heating system.
The following conditions must exist for active cooling:
1) System structure in accordance with hydraulic diagram with active cooling option
2) System configuration with active cooling option (WP001 = 01, 05, 14, 15, 51)
3) E1 input function (WP002) = DPM/MaxTh
4) Dew point monitor (DPM) or jumper connected to input E1
5) Dew point monitor (DPM) operational and not triggered
6) Enable active cooling (WP058) = ON
7) Active cooling standard setting = ON
8) No heating or DHW requirement present
9) Operating mode set for heating circuits to be cooled = automatic mode
10) Time within switching times set for active cooling (act. time program cooling)
11) Conditions for active cooling according to cooling curve setting
12) Outside temperature > outside temperature setting for enabling cooling (WP053)
13) Return temperature > set return temperature
14) Room temperature > day temperature for cooling
(where BM-2 installed in room to be cooled as remote control and room influence activated)
15) U = 1.2 V ... 4.0 V at input E2/SAF by BMS (system configuration 51 only)
Notes on the BM-2 programming unit:
− Room influence is only active if the BM-2 programming unit is installed as a remote control.
− When room influence is on, the standard setting "Day temperature" (for heating mode) is available and,
for systems with active cooling, the standard setting "Day temperature, cooling" (for cooling mode).
The "Cooling curve" submenu is displayed only when the "Active cooling" standard setting is enabled in the
contractor level.
− Temperature selection from -4 to +4 (parallel offset) and economy factor 0...10 (reduction in economy mode);
no effect in active cooling mode.

30.2 Power-OFF

The power supply utility (PSU) can temporarily block compressor or compressor and electric heater operation using
an external switching command (floating contact on terminal X1 – 9/10).
When the contact is open, the power-OFF function is active, i.e. regular operation of the compressor or
compressor and electric heater is inhibited via the control unit of the BWL-1S(B). The power-OFF function
is inactive when the contact is closed.
System frost protection (via compressor, electric heater and external additional heat generator), as well as the
function of heating/mixer circuit pumps, remain operational when power-OFF is enabled.
The active power-OFF status message is shown on the status or operating mode displays and in the
"Displays"/"Heating appliance" submenu on the AM display module and BM-2 programming unit.
Notes:
− For systems that can be temporarily blocked/shut down by the power supply utility (power-OFF), a
corresponding switching signal (floating contact) of the energy supply utility must be connected to terminal
X1-9/10 in order to signal the power-OFF period to the control unit of the BWL-1S(B).
− If the power-OFF function is not used, insert a jumper at terminal X1-9/10.
− The electrical connection of the power-OFF function must be made in accordance with the stipulations of the
local power supply utility.
Terminals X1 – 9/10:
Open
Bridged
Contractor parameters
WP025
WP092 Power-OFF for elec. heater
84
Additional functions
Function:
Power-OFF active
Heat pump standard mode
Meaning
Smart Grid
Setting:
OFF (= factory setting)
OFF, ON
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