Technical data

www.dimplex.de 01.2012 | Project planning manual for heat pumps for heating and domestic hot water preparation | 91
Heat pump manager 7.9.1
7.9 WPM Master for connecting multiple heat pumps in parallel
7.9.1 Description WPM Master
The wall-mounted WPM Master is available for controlling up to
14 heat pumps in parallel. With this controller, up to 30 perform-
ance levels of a monovalent, mono energy or bivalent system
can be controlled with outside-temperature dependant mode
switching.
Fig. 7.14: Controller for parallel connection of heat pumps - WPM Master
The WPM Master offers convenient 6-button operation. The sta-
tus values are output via an LC display with clear text (4x 20
characters).
NOTE
The contrast of the display can be brightened with the key combination
(ESC), (MODUS), and () or darkened with (ESC), (MODUS), and () All
three keys must be pressed and held together until the required contrast
level is set.
Functional description
 Parallel connection of up to 14 heat pumps
 Maximum of 30 performance levels
(passive cooling, 28 compressors, 2nd heat generator)
 Control of max. 3 heating circuits
 Central switching of operating modes
 Combination of passive and active cooling
 Automatic mode switching via limit temperatures
(Automatic, Summer, Cooling)
 Same as heat pumps with two performance levels
 Adjustable time window
 Adjustable switch-on times
Central and decentral control
Central or decentral domestic hot water preparation can be used
when controlling multiple heat pumps.
Central control
 Central definition of priorities for domestic hot water, heat-
ing, cooling and swimming pool
 Requirements are processed individually
 Definition of maximum performance levels for domestic hot
water preparation
 Decentral evaluation of a heat pump fault
Decentral control
 Central definition of priorities for heating and cooling
 Decentral definition of priorities for domestic hot water and
swimming pool
 Parallel operation of heating /cooling and domestic hot water
preparation/swimming pool possible
Definition of priorities
In order to ensure that the entire system operates efficiently, the
heat pumps are activated with different priorities by the master
controller. The master controller receives feedback from the indi-
vidual heat pump managers and therefore detects a fault or de-
central request for blocked heat pumps. With combinations of dif-
ferent heat pump types (air-to-water and brine-to-water heat
pumps), the different heat pumps are activated according to the
outside temperature:
 Preference is given to air-to-water heat pumps above an ad-
justable outside temperature
 Preference is given to brine-to-water heat pumps below an
adjustable outside temperature
In order to achieve a runtime distribution that is as even as pos-
sible, the master controller starts the compressor with the lowest
runtime first of all. To this end, the master controller determines
the runtimes of the individual compressors.