Technical data
www.dimplex.de 01.2012 | Project planning manual for heat pumps for heating and domestic hot water preparation | 83
Heat pump manager 7.6.2
7.6.2 Electrical installation of the heat pump WPM EconPlus
1) The three- or four-core supply cable for the output section of
the heat pump is fed from the heat pump meter via the utility
company block (if required) into the heat pump (1L/N/
PE~230V,50Hz or 3L/PE~400V,50Hz).
Safeguard according to the power consumption data on the
type plate, with a multipole circuit breaker in the phases
with C characteristic and common tripping for all paths.
Cable cross-section according to DIN VDE 0100.
2) The three-core supply cable for the heat pump manager
(heating controller N1) is fed into the heat pump (device with
integrated controller) or to the future mounting location of the
heat pump manager (WPM).
The (L/N/PE~230 V, 50 Hz) supply cable for the heat pump
manager must have a constant voltage. For this reason, it
should be tapped upstream from the utility blocking contac-
tor or be connected to the household current, as important
protection functions may otherwise be lost during a utility
block.
3) The utility blocking contactor (K22) with 3 main contacts
(1/3/5 // 2/4/6) and an auxiliary contact (NO contact 13/14)
should be dimensioned according to the heat pump output
and must be supplied by the customer.
The NO contact of the utility blocking contactor (13/14) is
looped from terminal strip X3/G to plug terminal N1-J5/ID3.
CAUTION! Extra-low voltage!
4) The contactor (K20) for the immersion heater (E10) of
mono energy systems (HG2) should be dimensioned ac-
cording to the radiator output and must be supplied by the
customer. It is controlled (230V AC) by the heat pump man-
ager via terminals X1/N and N1-J13/NO 4.
5) The contactor (K21) for the flange heater (E9) in the do-
mestic hot water cylinder should be dimensioned according
to the radiator output and must be supplied by the cus-
tomer. It is controlled (230V AC) by the heat pump manager
via terminals X2/N and N1-X2/K21.
6) The contactors mentioned in points 3, 4 and 5 are installed
in the electrical distribution system. The mains cables for the
heating elements should be dimensioned and protected ac-
cording to DIN VDE 0100.
7) The heat circulating pump (M13) is connected to terminals
X2/N and N1-X2/M13.
8) The domestic hot water circulating pump (M18) is con-
nected to terminals X2/N and N1-X2/M18.
9) The return sensor is integrated into air-to-water heat pumps
for outdoor installation, and is connected to the heat pump
manager via the control cable. The return sensor must be in-
stalled in the immersion sleeve in the manifold only when a
dual differential pressureless manifold is used. The single-
core wires are then connected to terminals X3/GND and X3/
R2.1. The A-R2 link cable (which is situated between X3/B2
and X3/1 when delivered) must then be connected to the X3/
1 and X3/2 terminals.
10) The external sensor (R1) is connected to terminals X3/
GND (ground) and N1-X3/R1.
11) The domestic hot water sensor (R3) is installed in the do-
mestic hot water cylinder and is connected to terminals X3/
GND (ground) and N1-X3/R3.
NOTE
When using three-phase current pumps, a power contactor can be acti-
vated with the 230V output signal of the heat pump manager.
Sensor cables can be extended with 2 x 0.75 mm cables up to 40 m.
NOTE
A detailed connection diagram for the heat pump manager WPM Econ-
Plus as shown in Chapter 7.4.4 on page 93 can also be found in the oper-
ating cost calculator at www.dimplex.de/betriebskostenrechner at the
end of the system layout.
Electrical connection of electronically regulated
circulating pumps
Electronically regulated circulating pumps have high starting cur-
rents, which may shorten the service life of the heat pump man-
ager. A coupling relay must therefore be installed between the
output of the heat pump manager and the electronically regu-
lated circulating pump.
This is not necessary if the maximum permissible operating cur-
rent of the heat pump manager of 2 A and the maximum permis-
sible starting current of the heat pump manager of 12 A are not
exceeded by the electronically regulated circulating pump or a
relevant approval has been issued by the pump manufacturer.
ATTENTION!
It is not permitted to connect more than one electronically regulated
circulating pump via a relay output.