Dimplex SI 24TE SI 37TE User manual

Montage- und
Gebrauchsanweisung
DeutschEnglishFrançais
Instructions d’installation
et d’utilisation
Installation and
Operating Instructions
Sole/Wasser-
Wärmepumpe für
Innenaufstellung
SI 24TE
SI 37TE
Brine-to-Water
Heat Pump for
Indoor Installation
Pompe à chaleur
eau glycolée-eau
pour installation
intérieure
Bestell-Nr. / Order no. / Node commande : 452234.66.10 FD 8609

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Table of contents
1 Read immediately..........................................................................................................................E-2
1.1 Important Information..............................................................................................................................E-2
1.2 Legal Provisions and Guidelines ............................................................................................................E-2
1.3 Energy-Efficient Use of the Heat Pump..................................................................................................E-2
2 Purpose of the heat pump............................................................................................................E-2
2.1 Application..............................................................................................................................................E-2
2.2 Principle of Operation.............................................................................................................................E-2
3 Baseline Unit..................................................................................................................................E-3
4 Accessories ...................................................................................................................................E-3
4.1 Connecting Flanges................................................................................................................................E-3
5 Transport........................................................................................................................................E-3
6 Installation .....................................................................................................................................E-4
6.1 General Information................................................................................................................................E-4
6.2 Sound Emissions....................................................................................................................................E-4
7 Mounting ........................................................................................................................................E-4
7.1 General Information................................................................................................................................E-4
7.2 Connection on Heating Side...................................................................................................................E-4
7.3 Connection on Heat Source Side ...........................................................................................................E-4
7.4 Electrical Connection..............................................................................................................................E-4
8 Commissioning .............................................................................................................................E-5
8.1 General Information................................................................................................................................E-5
8.2 Preparatory Steps...................................................................................................................................E-5
8.3 Commissioning Procedure......................................................................................................................E-5
9 Care/Cleaning ................................................................................................................................E-6
9.1 Care........................................................................................................................................................E-6
9.2 Cleaning og Heating Side.......................................................................................................................E-6
9.3 Cleaning of Heat Source Side ................................................................................................................E-6
10 Malfunctions / Troubleshooting...................................................................................................E-6
11 Decommissioning / Disposal .......................................................................................................E-6
12 Equipment Data.............................................................................................................................E-7
Anhang / Appendix / Annexes............................................................................................................ A-I

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1 Read immediately
1.1 Important Information
ATTENTION!
Any work on the heat pump may only be performed by an authorised and
qualified customer service.
ATTENTION!
The heat pump must not be tilted more than max.45° (in either direction).
ATTENTION!
Thetransportsecuringdevicesmustberemovedpriortocommissioning.
ATTENTION!
The heating system must be flushed prior to connecting the heat pump.
ATTENTION!
The supplied strainer must be fitted in the heat source inlet of the heat
pump in order to protect the evaporator against the ingress of impurities.
ATTENTION!
The brine solution must contain at least 25 % of an antifreeze agent on a
mono-ethylene glycol or propylene glycol basis and must be mixed prior
to filling.
ATTENTION!
The clockwise phase sequence must be observed when connecting the
load lines (the heat pump will deliver no output and will be very noisy
when the phase sequence is incorrect).
ATTENTION!
Commissioning is to be effected in accordance with the installation and
operating manual of the heat pump controller.
ATTENTION!
To prevent the accumulation of deposits (e.g. rust) we recommend using
a suitable corrosion protection system.
ATTENTION!
Disconnect all electrical circuits from the power supply before opening
the enclosure.
1.2 Legal Provisions and
Guidelines
This heat pump conforms to all relevant DIN/VDE regulations
and EU directives. For details refer to the EC Declaration of Con-
formity in the appendix.
The electrical connection of the heat pump must be performed
according to and conforming with all relevant VDE, EN and IEC
standards. Beyond that, the connection requirements of the local
utility companies have to be observed.
The heat pump is to be connected to the heat source and heat
distribution systems in accord-ance with all applicable provi-
sions.
ATTENTION!
Any work on the heat pump may only be performed by an authorised and
qualified customer service.
1.3 Energy-Efficient Use of the
Heat Pump
By operating this heat pump you contribute to the protection of
our environment. A prerequisite for an efficient operation is the
proper design and sizing of the heating system and the heat
source system. In particular, it is important to keep water flow
temperatures as low as possible. All energy consumers con-
nected should therefore be suitable for low flow temperatures. A
1 K higher heating water temperature corresponds to an increase
in power consumption of approx. 2.5 %. Low-temperature heat-
ing systems withflow temperatures between 30 °C and 50°C are
optimally suited for energy-efficient operation.
2 Purpose of the heat
pump
2.1 Application
The brine-to-water heat pump is designed for use in existing or
newly built heating systems. Brine is used as the heat carrier in
the heat source system. Ground coils, ground collectors or simi-
lar systems can be used as the heat source.
2.2 Principle of Operation
The heat generated by the sun, wind and rain is stored in the
ground. This heat stored in the ground is collected at low temper-
ature by the brine circulating in the ground collector, ground coil
or similar device.
A circulating pump then conveys the warmed brine to the evapo-
rator of the heat pump. There, the heat is given off to the refrig-
erant in the refrigeration cycle. When so doing,the brine cools so
that it can again take up heat energy in the brine circuit.
The refrigerant is drawn in by the electrically driven compressor,
is compressed and "pumped" to a higher temperature level. The
electrical power needed to run the compressor is not lost in this
process, but most of the generated heat is transferred to the re-
frigerant.
Subsequently, the refrigerant is passed through the condenser
where it transfers its heat energy to the heating water. Based on
the thermostat setting, the heating water is thus heated to up to
60 °C.

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3 Baseline Unit
The baseline unit consists of a heat pump, ready for connection,
for indoor installation, complete with sheet metal cabinet, control
box and integrated controller. The refrigeration cycle contains the
refrigerant R404A. Refrigerant R404A is CFC-free, non-ozone
depleting and non-combustible.
All components required for the operation of the heat pump are
located in the control box. A sensor for the external wall temper-
ature including mounting hardware as well as a strainer are sup-
plied with the heat pump. The voltage supply for the load and
control current must be provided by the customer.
The control wire of the brine pump (to be provided by the cus-
tomer) is to be connected to the control box. When so doing, a
motor protecting device is to be installed, if required.
The collector including the brine manifold must be provided by
the customer.
1) Control
2) Evaporator
3) Condenser
4) Compressor
5) Transport securing devices
6) Filter drier
4 Accessories
4.1 Connecting Flanges
The use of flat-sealing connecting flanges allows the unit, as an
option, to be connected by means of flanges.
5 Transport
For the transport by means of a hand truck or boiler trolley, po-
sition the latter under the front end of the unit below the transport
security device.
For transport on a level surface, the unit can be lifted from the
rear or from the front by means of a lift truck or forklift. In this
case, the transport securing device is not imperative.
ATTENTION!
The heat pump must not be tilted morethan max. 45° (in either direction).
After the transport, the transport securing device is to be re-
moved on either side at the bottom of the unit.
ATTENTION!
The transport securing device is to be removed prior to commissioning.
To remove the panelling, open the individual covers by unscrew-
ing the respective turn-lock fasteners and then gently tilting the
covers away from the device. Then lift them up out of the mount-
ings.
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6 Installation
6.1 General Information
As a rule, the unit must be installed indoors on a level, smooth
and horizontal surface. The entire base frame should make full
contact with the surface in order to ensure adequate sound insu-
lation. Failing this, additional sound insulation measures may be-
come necessary.
The heat pump should be installed to allow easy maintenance/
service access. This is ensured if a clearance of approx. 1 m in
front of the heat pump is maintained.
6.2 Sound Emissions
The heat pump offers silent operation due toefficient sound insu-
lation. Any vibration transmission to the foundation or the heating
system can be largely prevented by internal sound decoupling
measures.
7 Mounting
7.1 General Information
The following connections need to be estab-lished on the heat
pump:
supply/return flow of the brine system
supply/return flow of the heating system
power supply
7.2 Connection on Heating Side
ATTENTION!
The heating system must be flushed prior to connecting the heat pump.
Before completing the heat pump connections on the heating
water side, the heating installation must be flushed in order to re-
move any impurities that may be present, as well as residues of
sealing material, and the like. Any accumulation of deposits in
the condenser may result in a total failure of the heat pump.
Once the installation on the heating side has been completed,
the heating system must be filled, de-aerated and pressure-
tested.
Heating water minimum flow rate
The heating water minimum flow rate through the heat pump
must be assured in all operating states of the heating system.
This can be accomplished, for example, by installing a differential
pressure-free manifold or an overflow valve. The procedure for
setting an overflow valve is described in the Chapter Commis-
sioning.
Frost protection for installations prone to frost
Provided the controller and heating circulating pumps are ready
for operation, the frost protection feature of the controller is ac-
tive. If the heat pump is taken out of service or in the event of a
power failure, the system has to be drained. In heat pump instal-
lations where a power failure cannot be readily detected (holiday
house), the heating circuit must contain a suitable antifreeze
product.
7.3 Connection on Heat Source
Side
The following procedure must be observed when making the
connection:
Connect the brine line to the flow and return pipe of the heat
pump.
The hydraulic plumbing diagram must be observed here.
ATTENTION!
The supplied strainer must be fitted in the heat source inlet of the heat
pump in order to protect the evaporator against the ingress of impurities.
In addition, a microbubble deaerator must be installed in the
heat source system.
The brine liquid must be produced prior to charging the system.
The brine concentration must be at least 25 %. Freeze protection
down to -14°C can thus be ensured.
Only antifreeze products on the basis of mono-ethylene glycol or
propylene glycol may be used.
The heat source system must be vented (de-aerated) and
checked for leaks.
ATTENTION!
The brine solution must contain at least 25 % of an antifreeze agent on a
mono-ethylene glycol or propylene glycol basis and must be mixed prior
to filling.
7.4 Electrical Connection
The following electrical connections must be established on the
heat pump:
Connection of the control wire to terminals X1: L/N/PE in the
control box of the heat pump.
Connection of the load wire to terminals X5: L1/L2/L3/PE in
the control box of the heat pump.
Connection of the brine pump (to be supplied by the cus-
tomer) to terminal PE and pump contactor K5: 2/4/6 on the
control panel of the HP.
All electrical components required for the operation of the heat
pump are located in the control box.
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