Dimplex S1 7KS User Manual
CE
INSTALLATION and
OPERATING INSTRUCTIONS
Brine-to-Water Heat Pump
for Indoor Installation
SI 7KS
SI 9KS
SI 11KS
SI 14KS
Order No.: 452231.67.01 FD 8504
1
CONTENTS
1 PLEASE 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
4.2 Brine Pressostat
5 TRANSPORT 5
6 INSTALLATION 6
6.1 General Information
6.2 Sound Emissions
7 MOUNTING 6/7
7.1 General
7.2 Heating-Side Connection
7.3 Connection on Heat Source Side
7.4 Electrical Connection
8 COMMISSIONING 8
8.1 General
8.2 Preparatory Steps
8.3 Commissioning Procedure
9 CARE/CLEANING 8/9
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 Summer Shutdown
11.2 End-of-Life Decommissioning/Disposal
12 APPENDIX 10
2
1
READ IMMEDIATELY
1.1 Important Information
PLEASE READ IMMEDIATELY
CAUTION!
in the heat source inlet of the heat pump
in order to protect the evaporator against
contamination.
The supplied strainer is to be fitted
CAUTION!
wooden pallet.
CAUTION!
more than max. 45° (in either direction).
CAUTION!
panel assemblies!
CAUTION!
circuits, the installed expansion vessel (24
litres, 1.0 bar admission pressure) must be
supplemented by an additional vessel.
CAUTION!
least 25 % of an antifreeze and corrosion
protection agent on a monoethylene glycol or
propylene glycol basis.
CAUTION!
lines, the clockwise phase sequence must be
observed (in the case of an incorrect phase
sequence the heat pump will deliver no output
and generate a lot of noise).
CAUTION!
must be performed in accordance with the
installation and operating manual of the heat
pump controller.
CAUTION!
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 water 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 conditioner such as ELYSATOR be used.
The heat pump is not secured to the
The heat pump must not be tilted
Do not lift unit by the holes in the
In the case of large-capacity heating
The brine solution must contain at
On connecting the electrical load
Commissioning of the heat pump
Caution - Heating Contractors !
CAUTION!
only be performed by authorised and qualified
customer service agents.
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 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 accordance with all
applicable provisions.
1.3 Energy-Efficient Use of the Heat
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.
Any work on the heat pump may
Pump
3
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
The heat generated by the sun, wind and rain is
stored in the ground. This heat stored in the ground
is collected at low temperature by the brine circulating
in the ground collector, ground coil or similar device.
A circulating pump then conveys the warmed 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 transferred to the refrigerant as well.
BASELINE UNIT
32
The baseline unit consists of a heat pump of
compact design, ready for connection. In addition to
the control panel with integrated controller, the unit
also contains essential components of the heating
and brine circuits:
- expansion vessels
- circulating pumps
- pressure relief valves
- pressure gauges
- overflow valve (heating circuit)
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 provided on the control panel. The power
feed for load and control current must be fieldinstalled by the customer.
The collector loops including brine manifold must
be provided by the customer.
12
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.
3456
1) Control panel 4) Compressor
2) Circulating pumps 5) Evaporator
3) Condenser 6) Expansion vessel
4
ACCESSORIES
TRANSPORT
ACCESSORIES
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.
TRANSPORT
54
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.
CAUTION!
wooden pallet.
The heat pump is not secured to the
4.2 Brine Pressostat
Where this is a legal requirement, a low-pressure
brine pressostat may be installed in the unit. In this
case, the connection provided above the brine
expansion vessel should be used.
CAUTION!
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.
CAUTION!
assemblies for lifting the unit!
The heat pump must not be tilted
Do not use the holes in the panel
5
INSTALLATION
MOUNTING
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 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.
MOUNTING
7
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 space heating and
water heating system
- common return of space heating and water
heating system
- return, overflow valve
- connection for additional expansion vessel
(as required)
- drain lines of overflow valves
- condensate drain
- power supply
7.2 Heating-Side Connection
The heat pump features separate outlets for the space
heating and water heating circuit.
6.2 Sound Emissions
The heat pump offers silent operation due to efficient
sound insulation. Noise transmission to the
foundation or the heating system is largely prevented
by internal decoupling measures.
In cases where the heat pump has no water heating
mode, the hot water outlet has to be permanently
sealed.
Prior to establishing 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, or the like. Any accumulation of deposits in
the condenser may result in a total failure of the heat
pump.
In systems equipped with heating water flow shutoff devices such as radiator or thermostat valves, an
overflow valve is installed. This assures a minimum
heating water flow through the heat pump and
prevents any malfunctions for occurring.
Once the installation on the heating side has been
completed, the heating system must be filled,
deaerated and pressure-tested.
Frost Protection for Installations Prone to Frost
Provided the controller and the heating circulating
pumps are ready for operation, the frost protection
function of the controller is always activated. If the
heat pump is taken out of service or in the event of a
power failure, the system must be drained. In heat
6
MOUNTING
pump installations where a power failure cannot
readily be detected (e.g. holiday houses), the heating
circuit must contain a suitable antifreeze product.
The integrated expansion vessel has a capacity of
24 litres.This capacity is appropriate for buildings
with a heated living space floor area of up to 200 m
The planner of the heating system should verify that
the capacity of the expansion vessel is adequate. An
additional expansion vessel may have to be
installed, if required (as per DIN 4751 Part 1). Charts
in manufacturer catalogues facilitate the proper
selection of the proper size according to the amount
of water in the system.
CAUTION!
the installed expansion vessel (24 litres, 1.0 bar
admission pressure) must be supplemented by
an additional vessel.
With large-capacity heating circuits,
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 and vent
must be field-installed in the brine inlet of the heat
pump.
The powerful vent must be installed at the highest
point of the heat source system
7.4 Electrical Connection
The following electrical connections must be
established on the heat pump.
- Connection of the load wire to the control panel
2
.
of the heat pump.
- Connection of the control voltage wire to the
control panel of the heat pump.
All electrical components required for the operation
of the heat pump are located on the control panel..
For detailed instructions concerning the connection
of external components and the operation of the heat
pump controller refer to the heat pump terminal diagram and the operating manual of the controller.
Connection of the load wire to the control panel via
terminals X1: L1/L2/L3/PE.
An all-pole disconnecting device with a contact gap
of at least 3 mm (e.g. utility company disable contactor or power contactor) as well as a 3-pole circuit
breaker with simultaneous tripping of all external
conductors must be provided . The required crosssectional area of the conductor is to be selected
according to the power consumption of the heat
pump, the technical connection requirements of the
relevant utility company and all applicable regulations. Power consumption data of the heat pump is
provided in the product literature and on the
nameplate. The terminals are designed for a max.
conductor cross-section of 10 mm˝.
The hydraulic block schematic must be taken into
account when so doing.
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 agents on a monoethylene glycol or
propylene glycol basis are to be used.
The heat source system has to be vented and leaktested.
CAUTION!
least 25 % of an antifreeze and corrosion protection
agent on a monoethylene glycol or propylene glycol
basis.
The brine solution must contain at
CAUTION!
must be observed when connecting the electric
load lines (in the case of an incorrect phase
sequence the heat pump will deliver no output
and generate a lot of noise).
Connection of the control voltage wire is effected via
terminals X1: L/N/PE.
If a more powerful brine pump is required than the
one integrated, a motor contactor and an appropriate
motor protecting switch need to be installed. The
contactor must be connected to the terminals of the
internal brine pump (controller terminals J12/N03
and X1-N). The power supply of the larger pump
must be provided by the mains supply.
The clockwise phase sequence
7
COMMISSIONING
CARE/CLEANING
8
COMMISSIONING
8.1 General
To ensure proper commissioning it should be
carried out by an after-sales service authorised by
the manufacturer. Only then can an extended
warranty period of 3 years in total be granted (cf.
Warranty service).
8.2 Preparatory Steps
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 be filled and tested.
- Strainer and vent must be fitted in the brine inlet
of the heat pump.
- All valves that could impair the proper water flow
must be open in the brine and heating circuits.
- The heat pump controller must be adapted to the
heating installation in accordance with the
instructions contained in its operating manual.
- Proper condensate drainage must be ensured.
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Close all of the heating circuits that may also be
closed during operation (depending on the type
of heat pump usage) so that the least favourable
operating state - with respect to the water flow
rate - is achieved. Normally, these are the heating
circuits of the rooms located on the south and
west sides of buildings. At least one heating circuit
must remain open (e.g. bathroom).
The overflow valve is to be opened to such an
extent that based on the current heat source temperature the maximum temperature difference
between heating supply and return flow temperature is obtained, as indicated in the table
below. The temperature difference should be
measured as closely to the heat pump as
possible. In mono-energetic systems, the electric
heating element is to be deactivated.
Heat source temperature
from to
-5 °C 0 °C 10 K
1 °C 5 °C 11 K
6 °C 9 °C 12 K
10 °C 14 °C 13 K
15 °C 20 °C 14 K
21 °C 25 °C 15 K
Any malfunctions occurring during operation are
indicated on the display of the heat pump controller
and can be corrected as described in the operating
manual of the heat pump controller.
max. difference between heating
supply and return temperature
CARE/CLEANING
9.1 Care
- Drainage of the liquid emerging from the brine
and heating water overflow valves must be
ensured.
8.3 Commissioning Procedure
The start-up of the heat pump is effected via the heat
pump controller.
CAUTION!
must be carried out in accordance with the
installation and operating manual of the heat
pump controller.
The delivery rate of the circulating pump must be
adapted to the heating system.
The setting of the overflow valve must be adapted to
the requirements of the heating system. An incorrect
setting may result in various error symptoms and an
increased electric power consumption. To correctly
set the overflow valve, the following procedure is
recommended:
Commissioning of the heat pump
The heat pump is designed for maintenance-free
operation. To prevent operating malfunctions caused
by dirt deposits in the heat exchangers, care must be
taken that no contamination whatsoever can enter the
heat source and heating systems. 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 the 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 in the performance of the condenser in the
heat pump, the system must be cleaned by a heating
technician.
8
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