Electrical Connection; Start-Up; General; Preparation - Dimplex HWK 332 Installation And Operating Instructions Manual

HWK 332 - HWK 332 Econ5P

7.4 Electrical connection

The power supply and control voltage are supplied using stand-
ard cables (load: 3~ 5-core / 1~ 3-core; control 3-core).
For detailed instructions on how to connect the external compo-
nents and how the heat pump manager functions, please refer to
the device connection diagram and the operating instructions
supplied with the heat pump manager.
An all-pole disconnecting device with a contact gap of at least
3 mm (e.g. utility blocking contactor or power contactor) and an
all-pole circuit breaker with common tripping for all external con-
ductors must be installed in the power supply for the hydro tower
(tripping current in compliance with the device information).
The correct control voltage must be ensured according to the
general information leaflet.
On delivery, the second heat generator is connected with a 6 kW
heat output. To reduce the output to 4 kW or 2 kW, one or both
of the two copper link cables must be removed from terminal X7
(see circuit diagram).
For detailed information, see circuit diagrams in the appendix.
The pipe heater (2nd heat generator) must only be connected by
authorised electricians according to the corresponding circuit di-
agram. Regulations of the utility company and national guide-
lines must be observed (VDE).
If an optional immersion heater is used (with 1½" external thread
in the buffer tank), a contactor must be used which is suited to
the relevant switching capacity. This must be installed next to the
existing contactor on the mounting rail of the switch box. The im-
mersion heater used must be equipped with an integrated safety
temperature limiter. The immersion heater must be electrically in-
tegrated into the system according to the circuit/connection dia-
gram in the Appendix. The electrical connection lines can be con-
nected to the hydro tower either from the top or from the bottom.
A cable duct is integrated into the polyurethane foam at the top
of the cylinder (under the upper covering cap) which makes it
possible to lay the electrical cables under the upper cover (from
the rear of the cylinder to the front/connection side).
NOTE
To use the HWK 332 Econ5P, two connecting cables (< 25 V / 230 V) must
be routed between the heat pump managr and the heat pump. In
combination with heat pumps with integrated electronic expansion valve,
a third connection cable must also be used as a communication cable.
EN-8
8

Start-up

8.1 General

To ensure that start-up is performed correctly, it should only be
carried out by an after-sales service technician authorised by the
manufacturer. This may be a condition for extending the guaran-
tee.

8.2 Preparation

The following items need to be checked prior to start-up:
 All of the hydro tower connections must be installed as de-
scribed in chapter 7.
 All valves that could impair the proper flow of the heating
water in the heating circuit must be open.
 The settings of the heat pump manager must be adapted to
the heating system in accordance with the latter's operating
instructions.

8.3 Procedure

The hydro tower is started up via the heat pump manager. Set-
tings should be made in compliance with the instructions.
The operating overpressures indicated on the type plate must not
be exceeded.
Any faults which occur during operation are also displayed on the
heat pump manager. They can be rectified as described in the
operating instructions.
452162.66.05 · FD 9501