Assembly; General; Heating System Connection; Electrical Connection - Dimplex HWK 332 Econ Installation And Operating Instructions Manual

6
6

Assembly

6.1 General

The following connections need to be made on the hydro tower
Flow / return of the heat pump
Flow / return of the heating system
Safety valve outflow
Power supply
Hot water pipe
Circulation pipe
Cold water pipe
Voltage supply
NOTE
When removing the device cover (HWK332-econ versions only), it must
be taken into account that the length of the connecting cable between the
control panel in the device cover and the controller on the operator panel
is only 1.5m. If the device cover can only be placed further away than this
when it has been removed, the plug connection on the controller or on the
control panel must first be disconnected.

6.2 Heating system connection

The heating system connections on the hydro tower have a 1 1/
4" flat-sealing external thread. A spanner must be used to firmly
grip the transitions when making the connections.
A dimensionally stable ¾" plastic hose (inner diameter approx.
19 mm) must be affixed to the hose nozzle, e.g. with a pipe
clamp, and guided outside the building in the area behind the
heat pump return.
Before the heating water system is connected, it must be flushed
to remove any impurities, residue from sealants, etc. Any accu-
mulation of deposits in the liquefier may cause the heat pump to
completely break down. For systems in which the heating water
flow can be shut off via radiator or thermostat valves, the infinitely
adjustable circulating pump carries out a demand-related adjust-
ment of the delivery height. The initial filling and start-up must be
carried out by an authorised specialist company. The entire sys-
tem, including all factory-assembled components, should be in-
spected to ensure that everything is working properly and that
there is no leakage.
The buffer tank and heating system must be filled via the filling
and drain cock on the hydro tower. The cylinder must be de-aer-
ated using the air-relief cock on the upper pipe connection to the
cylinder.
If it is necessary to connect heating connection pipes to the rear
of the cylinder, these can also be laid underneath the cylinder.
Minimum heating water flow
The minimum heating water flow of the heat pump is ensured by
the the dual differential pressureless manifold in all operating
states of the heating system.
EN-4

Frost protection

A method of manual drainage must be provided for heat pumps
which are exposed to frost. The frost protection function of the
heat pump controller is active whenever the controller and the
heat circulating pump are ready for operation. The system has to
be drained if the heat pump is taken out of service or if a power
failure occurs. The hydraulic network should be operated with
suitable frost protection if heat pump systems are implemented in
buildings where a power failure cannot be detected (vacation
homes etc.).

6.3 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 control voltage must be protected by a 10 A fuse.
On delivery, the 2nd heat generator is connected with a 2 kW
heat output. To increase the output to 4 kW or 6 kW, the copper
bridges included in the scope of supply must be connected as
shown in the 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).