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INSTALLATION
Commissioning
SOURCE MEDIUM
ETHYLENE GLYCOL
POTASSIUM CARBONATE
EXTRACT MODULE 0
EXTRACT AIR MODULE 30
EXTRACT AIR MODULE 60
EXTRACT AIR MODULE 120
EXTRACT AIR MODULE 180
WATER
GROUNDWATER MODULE
Note
The heat pump can only be operated as a ground source
heat pump.
11.1.4 HEATING
CONTROLLER DYNAMICS
The selected controller dynamics are a measure of the switching
interval between the compressor and the electric emergency/
booster heater. Normally, the preselected dynamics must be suf-
ficiently fast and without oscillation. Heating systems that respond
quickly require a lower value, whilst very slow responding systems
require a higher value to be set.
HYSTERESIS
Set the start-up hysteresis for the heat pump here.
SPREAD CONTROL
The flow rate for the circulation pump is controlled automatically
by the heat pump.
SET SPREAD
Here, you can set the temperature differential between the flow
and return sensors. The heat pump keeps the temperature differ-
ential constant at the set value by adjusting the circulation pump
flow rate accordingly.
MAXIMUM PUMP RATE
With this parameter, you set the maximum flow rate and therefore
the pump rate. The pump rate will not exceed the value set here.
The time taken to achieve the set spread can vary on account of
this setting.
STANDBY PUMP RATE
Here, you can set the minimum pump rate for the internal circu-
lation pump while the heat pump is idle. The pump will run at the
output set here as long as the heat pump does not receive a heat
demand, as well as during power-OFF periods and idle times.
HEATING CIRC PUMP RATE
Set the flow rate via the heating circuit pump output. Note the
“nominal heating flow rateat A2/W35 or B0/W35 and 7 K” for the
heat pump (see chapter “Specification / Data table” of the heat
pump).
11.1.5 DHW
DHW CIRCUIT PUMP RATING
Set the maximum flow rate via the DHW pump output. If noise
occurs, reduce the output.
11.1.6 COMPRESSOR
MINIMUM DEFROST TIME
Pre-selectable time in minutes for the IWS defrost process. The
selected time applies to manual or demand-dependent defrosting.
START DEFROST
Manual defrosting can only be initiated with the heat pump in
operation.
The defrost signal is displayed.
Demand-dependent defrosting is initiated via a signal from the air
pressure cell, the air pressure sensor, or by assessing the process
value constellation in the refrigerant circuit.
During defrosting, the fan is switched off and the defrosting pro-
cess is started with or without a delay.
Defrosting is terminated when the relevant heat pump type reach-
es its condensation pressure limit.
Defrost mode heat pump type 1/1*
As soon as defrosting is initiated via the air pressure cell, the heat
pump switches to forced heating for 5 minutes.
The flow and return temperatures are monitored in the final 30
seconds of forced heating. The DEFROST fault is displayed at tem-
peratures of <18°C.
Exception WPL 10 AC: Defrosting is initiated by assessing the pro-
cess value constellation in the refrigerant circuit. In heating mode
the heat pump switches immediately into defrost mode. In DHW
mode it switches into heating mode before defrosting.
In addition, the water flow rate (calculated from heating output,
flow and return temperature, and comparisons with minimum
heat pump-specific flow rates) is monitored in the final 30 seconds
of forced heating. The FLOW RATE fault is displayed if the average
minimum flow rate value is too low.
When the heat pump is in DEFROST mode, the electric booster
stages (NHZ) switch on if the temperature falls below 15 °C at the
condenser (frost protection sensor) or the heat pump flow.
In addition, the temperatures for frost protection, flow and return
temperature are monitored in the DEFROST operating mode. The
fault DEFROSTis displayed at temperatures of < 10°C.
Fault logic: 5 faults in 2 hours of compressor runtime will cause
the heat pump to interlock.
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