Dimplex SI 9MSR Technical document

1
MOUNTING and
OPERATING MANUAL
Brine-to-Water Heat Pump
for Indoor Installation
SI 9MSR
SI 11MSR
SI 5MSR
SI 7MSR
CE
Order No.: 452232.67.04 FD 8404

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CONTENTS
1 READ IMMEDIATELY 3
1.1 Important Information
1.2 Legal Provisions and Directives
1.3 Energy-Efficient Use of the Heat Pump
2 PURPOSE OF THE HEAT
PUMP 4
2.1 Application
2.2 Principle of Operation
3 BASELINE UNIT 4
4 ACCESSORIES 5
4.1 Brine Manifold
5 TRANSPORT 5
6 INSTALLATION 6
6.1 General Information
6.2 Sound Emissions
7 MOUNTING 6/7
7.1 General
7.2 Connection on Heating Side
7.3 Connection on Heat Source Side
7.4 Electrical Connection
8 COMMISSIONING 7
8.1 General
8.2 Preparation
8.3 Procedure for Commissioning
9 CARE/CLEANING 8
9.1 Care
9.2 Cleaning of Heating Side
9.3 Cleaning of Heat Source Side
10 MALFUNCTIONS/TROUBLE-
SHOOTING 9
11 DECOMMISSIONING 9
11.1 Shutdown in Summer
11.2 End-of-Life Decommissioning
12 Appendix 10

3
READ IMMEDIATELY
1.1 Important Information
The heat pump is not attached to the
wooden pallet.
The heat pump must not be tilted
more than max. 45°(in either direction).
Do not lift unit by the holes in the
panel assemblies!
Flush the heating system prior to
connecting the heat pump.
The supplied strainer is to be fitted
in the heat source inlet of the heat pump in order
to protect the evaporator against contamina-
tion.
The brine must contain at least 25 %
of a frost and corrosion protection agent on a
monoethyleneglycol or propyleneglycol basis.
Commissioning of the heat pump
must be performed in accordance with the
mounting and operating manual of the heat
pump controller.
Any work on the heat pump may only
be performed by authorised and qualified
customer service technicians.
1
READ IMMEDIATELY
CAUTION!
CAUTION!
CAUTION!
CAUTION!
CAUTION!
CAUTION!
CAUTION!
All power circuits must be dis-
connected from the power source prior to
opening the cabinet.
1.2 Legal Provisions and Directives
This heat pump conforms to all relevant DIN/VDE
regulations and EU directives. For details refer to
the EC Declaration of Conformity in the appendix.
The electrical connection of the heat pump must be
performed according to and conforming with all re-
levant VDE, EN and IEC standards. Beyond that, the
connection requirements of the local utility compa-
nies have to be observed.
The heat pump is to be connected to the heat source
and heating systems in accordance with all
applicable provisions.
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 connected 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 %. Underfloor heating
systems with flow temperatures between 30 °C and
40 °C are optimally suited for energy-efficient
operation.
CAUTION!
CAUTION!

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BASELINE UNIT
The baseline unit consists of a heat pump, ready
for connection, for indoor installation complete with
sheet metal cabinet, control panel and integrated
controller. The refrigeration cycle contains the
refrigerant R407C. Refrigerant R407C is CFC-free,
non-ozone depleting and non-combustible.
All components required for the operation of the heat
pump are located on the control panel. The power
feed for the load and control current must be field-
installed by the customer.
The supply lead of the brine pump (to be provided by
the customer) must be connected to the control
panel. When so doing, a motor protecting device is
to be installed, if required.
The collector loops including brine manifold must
be provided by the customer.
1 2
34
1) Condenser 3) Compressor
2) Control panel 4) Evaporator
32
PURPOSE OF HEAT PUMP
BASELINE UNIT
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 similar systems
can be used as the heat source.
2.2 Principle of Operation
Heating
The heat generated by the sun, wind and rain is
stored in the ground. This heat stored in the ground
is collected by the brine circulating in the ground
collector, ground coil or similar device, at low
temperature. A circulating pump then conveys the
"heated" brine to the evaporator of the heat pump.
There, the heat is given off to the refrigerant 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, however, 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 trans-
ferred to the refrigerant as well.
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 55 °C.
Cooling
In the Cooling mode, the operating process of the
evaporator and condenser is reversed.
The heating water transfers the heat to the refrigerant
via the condenser that is now working as the
evaporator. In the compressor the temperature of
the refrigerant is raised. The heat is rejected to the
brine, and ultimately to the ground, via the condenser
(which acts as the evaporator in the heating mode).

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54ACCESSORIES
4.1 Brine Manifold
The brine manifold ties the individual collector loops
of the heat source system into a single main line
which is connected to the heat pump. Integrated ball
valves allow individual brine circuits to be shut off for
venting purposes.
ACCESSORIES
TRANSPORT
TRANSPORT
A lift truck is suited for transporting the unit on a level
surface. If the heat pump needs to be transported
on an uneven surface or carried up or down stairs,
carrying straps may be used for this type of transport.
These straps may be passed directly underneath
the wooden pallet.
The heat pump is not secured to the
wooden pallet.
The heat pump must not be tilted
more than max. 45°(in either direction).
For lifting the unit without pallet, the holes provided
in the sides of the frame should be used. The side
panel assemblies must be removed for this
purpose. A commercially available pipe can be used
as a carrying aid.
Do not use the holes in the panel
assemblies for lifting the unit!
CAUTION!
CAUTION!
CAUTION!

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MOUNTING
7.1 General
The following connections need to be established
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
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 remove 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
Commissioning.
Frost protection for installations prone to frost
Provided the controllers and circulating pumps are
ready for operation, the frost protection feature of the
controller is active. 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 installations where
a power failure cannot be readily detected (holiday
house), the heating circuit must contain a suitable
antifreeze product.
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 thereby make close contact with the
surface in order to ensure adequate sound
insulation. Failing this, additional sound insulation
measures may become necessary.
The heat pump should be located to allow safe and
easy maintenance/service access. This is ensured
if a clearance of approx. 1 m in front of and to each
side of the heat pump is maintained.
6.2 Sound Emissions
The heat pump offers silent operation due to efficient
sound insulation. To prevent noise transmission to
the foundation, a suitable, sound dampening rubber
mat should be placed underneath the base frame
of the heat pump.
To prevent any sound transmission to the heating
system it is recommended that the heat pump is
connected to the heating system by means of hose
sections.
7
INSTALLATION
MOUNTING
6
CAUTION!

7
7.4 Electrical Connection
The following electrical connections must be
established on the heat pump:
- Connection of the control wire to the control panel
of the heat pump via terminals X1: L/N/PE.
- Connection of the load wire to the control panel of
the heat pump via terminals X6: L/N/PE.
- Connection of the brine pump (to be provided by
the customer) to the control panel of the heat pump
via terminal X1: PE and pump contactor K5: 2/4.
All electrical components required for the operation
of the heat pump are located on the control panel.
For detailed instructions concerning the connection
and functioning of the heat pump controller refer to
the operating manual supplied with the controller.
A disconnecting device with a contact gap of at least
3 mm (e.g. utility company shut-off contactor or power
contactor) as well as a 1-pole circuit breaker have to
be provided. The required cross-sectional area of the
conductor is to be selected according to the
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 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 powerful vent must be installed at
the highest point of the heat source system. The
hydraulic plumbing diagram must be observed
here.
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 and be
checked for leaks.
The brine solution must contain at
least 25 % of an antifreeze and corrosion
protection agent on a monoethylene glycol or
propylene glycol basis.
8
CAUTION!
MOUNTING
COMMISSIONING
CAUTION!
power consumption of the heat pump, the technical
connection requirements of the relevant electrical
utility company as well as all applicable regulations.
Details on the power consumption of the heat pump
are contained on the product information sheet and
the typeplate. The terminals are designed for a max.
conductor cross-section of 10 mm˝.
COMMISSIONING
8.1 General
To ensure proper commissioning it should be
carried out by an after-sales service authorized by
the manufacturer. Only then can an extended
warranty period of 3 years in total be granted (cf.
Warranty service). Commissioning must be carried
out in the heating mode.
8.2 Preparation
Prior to commissioning, the following items need to
be checked:
- All connections of the heat pump must have been
made as described in Chapter 7.
- The heat source system and the heating circuit
must have been filled and checked.
- The strainer must have been fitted in the sole inlet
of the heat pump.
- In the brine and heating circuits all valves that could
impair the proper heating water flow must be open.
- The settings of the heat pump controller must be
adapted to the heating installation in accordance
with the instructions contained in the controller's
operating manual.
8.3 Commissioning Procedure
The start-up of the heat pump is effected via the heat
pump controller.
Commissioning of the heat pump
must be performed in accordance with the
mounting and operating manual of the heat
pump controller.
Where the minimum heating water flow rate is assured
by means of an overflow valve, the valve must be set
to meet the requirements of the heating installation.
An incorrect setting may result in various error
symptoms and an increased electrical power
CAUTION!

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9
COMMISSIONING
CARE/CLEANING
consumption. To correctly set the overflow valve, the
following procedure is recommended:
a) Open all heating circuits and close the overflow
valve. Determine the resulting temperature
difference between supply and return flow.
b) Close all of the heating circuits that may also be
closed during operation (depending on the type
of heat pump usage) so that the most unfa-
vourable operating state - with respect to the water
flow rate - is achieved.
c) In this operating state open the overflow valve
until approximately the same temperature
difference exists that was measured under a)
when the overflow valve was closed and the
heating circuits open.
Any malfunctions occurring during operation are
displayed on the heat pump controller and can be
corrected as described in the operating manual of
the heat pump controller.
CARE/CLEANING
9.1 Care
The heat pump is maintenance-free. To prevent
malfunctions due to sediments in the heat ex-
changers, care must be taken that no impurities can
enter the heat source system and heating installa-
tion. In the event that operating malfunctions due to
contamination occur nevertheless, the system
should be cleaned as described below.
9.2 Cleaning of Heating Side
The ingress of oxygen into the heating water circuit
may result in the formation of oxidation products
(rust). It is therefore important - in particular with
respect to the piping of underfloor heating systems
- that the installation is executed in a diffusion-proof
manner.
Also residues of lubricating and sealing agents may
contaminate the heating water.
In the case of severe contamination leading to a
reduction of the performance of the condenser in
the heat pump, the system must be cleaned by a
heating technician.
CAUTION!
CAUTION!
Based on information known to date we recommend
cleaning with a 5% phosphoric acid solution or, in
the case that cleaning needs to be performed more
frequently, with a 5% formic acid.
In either case, the cleaning fluid should be at room
temperature. It is recommended that the heat
exchanger is cleaned in the direction opposite to
the normal flow direction.
To prevent acidic cleaning agents from entering the
circuit of the heating installation we recommend that
the flushing device be fitted directly to the supply
and return lines of the condenser. To prevent any
damage caused by cleaning agent residues that
may be present in the system it is important that the
system be thoroughly flushed using appropriate
neutralising agents.
The acids must be used with great care, all relevant
regulations of the employers' liability insurance
associations must be adhered to.
If in doubt, contact the manufacturer of the chemicals!
Caution - Heating Technicians !
Depending on the filling water quality and quantity,
in particular in the case of mixed installations
and plastic pipes, mineral deposits (rust sludge,
lime) may form, impairing the proper functioning
of the heating installation. A reason for this is the
water hardness and oxygen dissolved in the filling
waters as well as additional oxygen from the air,
which may penetrate via valves, fittings and
plastic pipes (oxygen diffusion). As a preventive
measure it is recommended that a physical water
conditio-ner such as ELYSATOR be used.
9.3 Cleaning of Heat Source Side
The supplied strainer is to be install-
ed in the heat source inlet of the heat pump in
order to protect the evaporator against conta-
mination.
The filter screen of the strainer should be cleaned
one day after commissioning, thereafter every week.
If no more contamination can be noticed any more,
the strainer filter can be removed in order to reduce
pressure losses.

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10
CAUTION!
11
All work on the heat pump may only
be performed by an authorised and qualified
after-sales service.
MALFUNCTIONS/TROUBLE-
SHOOTING
DECOMMISSIONING
MALFUNCTIONS/
TROUBLESHOOTING
This heat pump is a quality product and is designed
for trouble-free operation. In the event that a
malfunction occurs nevertheless, you will be able to
correct the problem yourself in most of the cases.
Simply consult the Malfunctions and Trouble-
shooting table contained in the operating manual of
the heat pump controller.
Additional malfunctions can be interrogated at the
heat pump controller.
If you cannot correct the malfunction yourself, please
contact the after-sales service agent in charge (see
Warranty Certificate).
All electrical circuits must be dis-
connected from the power source prior to
opening the equipment.
CAUTION!
DECOMMISSIONING
11.1 Shutdown in Summer
Shutting down the heating system in summer is
effected by switching the heat pump controller to the
"Summer" operating mode.
11.2 End-of-Life Decommissioning/
Disposal
Before removing the heat pump, disconnect the
machine from the power source and close all valves.
Environment-relevant requirements regarding the
recovery, recycling and disposal of service fuels and
components in accordance with all relevant
standards must be adhered to. Particular attention
must hereby be paid to the proper disposal of
refrigerants and refrigeration oils.

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APPENDIX
12
12.1 Dimensioned Drawing 11
12.2 Equipment Data 12
12.3 Schematics
12.3.1 Heating mode .. 5MSR 13
12.3.2 Cooling mode .. 5MSR 14
12.3.3 Heating mode .. 7MSR 15
12.3.4 Cooling mode .. 7MSR 16
12.3.5 Heating mode .. 9MSR 17
12.3.6 Cooling mode .. 9MSR 18
12.3.7 Heating mode .. 11MSR 19
12.3.8 Cooling mode .. 11MSR 20
12.4 Wiring Diagram
12.4.1 Control, standard controller 21
12.4.2 Control, cooling controller 22
12.4.3 Load 23
12.4.4 Terminal diagr., standard controller 24
12.4.5 Terminal diagr., cooling controller 25
12.4.6 Legend 26
12.5 Hydraulic Block Diagram 27
12.6 EC Declaration of Conformity 28
12.7 Warranty Certificate 29
APPENDIX