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EN-115B_f.1420
Connection of external sensors and control devices
WE-019/01 cooling buffer temperature sensor (TCB input) - optional, additional equipment
Keep the sensor connection cable as short as possible, do not run it in close proximity to power cables and do not wrap it
around other cables. The sensor is required if the unit is configured to work with a fan coil
[MAINTENANCE / CONFIGURATION
-> Configuration -> Cooling -> Type: Fan coil]
.
Temperature sensor in WE-019/05 radiator heating circuit (THC1 input)
The installation location for the sensor is shown in the hydraulic installation diagram. The sensor is required if the CO1 circuit
is active
[MAINTENANCE / CONFIGURATION -> Configuration -> CO1 circuit -> circuit: Yes].
WE-019/05 panel heating circuit temperature sensor (THC2 input)
The installation location of the sensor is shown on the plumbing diagram.
The sensor is required if the CO2 circuit is active
[MAINTENANCE / CONFIGURATION -> Configuration -> CO2 circuit -> circuit: Yes]
.
WE-019/01 tap water tank temperature sensor (TCYL input)
Water temperature sensor in the tap water tank, place it in the tank socket.
WE-033 room temperature sensor (TR input)
The room temperature sensor should be installed in a room that may serve as a reference for the building, away from radiators,
windows, doors and passageways.
The minimum installation height is 150 cm. Keep the temperature sensor cable as short as possible, do not run it in close
proximity to power cables and do not wrap it around other cables.
WE-027 outdoor temperature sensor (TO input)
The sensor should be mounted in a shaded location on the north or north-west elevation of the building, away from windows
and vents. Keep the temperature sensor cable as short as possible, do not run it in close proximity to power cables and do not
wrap it around other cables.
Functional input 1 (FN1 input)
When the input is opened, the unit’s central heating is blocked. The input is active in the winter mode.
Functional input 2 (FN2 input)
Forced outdoor cooling demand. The input is active in the summer mode. Shorting the circuit activates the unit in the cooling
mode, according to the parameters set. An HP.HS.24 humidity sensor/switch (optional) can be plugged into the circuit to protect
the plumbing system from condensation.
Connection to the hydraulic system
The HPM2 heat pump can operate in a closed-loop hydraulic system (the minimum heating medium pressure is 0.6 bar).
The hydraulic installation must be carried out in compliance with the applicable standards. The pipes connecting the heat pump
to the indoor unit must have an internal diameter to ensure an adequate flow of the heating medium (see technical data table).
Flexible hoses must be used to connect the heat pump to the hydraulic system to prevent the transmission of vibrations to the
system. The heating medium pipes and connections must be thermally insulated. Do not switch off the unit when the outdoor
air temperature is below freezing. This will protect the condenser of the outdoor unit from damage. If there is a risk of power
failure, the heat pump heating circuit must be isolated from the hydraulic module by means of an additional exchanger and the
heat pump heating circuit must be filled with an antifreeze. A prerequisite for the warranty is an installation of a solids separator
at the unit inlet.
The hydraulic installation must be made in such a way that the HPMI2 indoor unit can be operated in the heating circuit without
the HPMO2 outdoor unit (according to the installation diagrams below). This will ensure the operation of the heating system in
the event of a failure of the HPMO2 outdoor unit.
Summary of Contents for HPMI2 - 12
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