Dimplex LA 9MS User manual

LA 9MS
Air-to-Water Heat Pump for
Outdoor Installation
Installation and
Operating Instructions
8/60189/0
ISSUE 1

1
Table of contents
1 Please Read Immediately.................................................................................................................2
1.1 Important Information:................................................................................................................................ 2
1.2 Intended Use.............................................................................................................................................. 2
1.3 Legal Regulations and Directives .............................................................................................................. 2
1.4 Energy-Efficient Use of the Heat Pump ..................................................................................................... 2
2 Purpose of the Heat Pump...............................................................................................................3
2.1 Application ................................................................................................................................................. 3
2.2 Operating Principle .................................................................................................................................... 3
3 Scope of Delivery..............................................................................................................................3
3.1 Basic Device .............................................................................................................................................. 3
3.2 Switch Box ................................................................................................................................................. 3
3.3 Heat Pump Manager.................................................................................................................................. 4
4 Transport ...........................................................................................................................................4
5 Set-UP ................................................................................................................................................4
5.1 General Information ................................................................................................................................... 4
5.2 Condensed Water Pipe.............................................................................................................................. 4
6 Installation.........................................................................................................................................5
6.1 General Information ................................................................................................................................... 5
6.2 Heating System Connection ...................................................................................................................... 5
6.3 Electrical Connection ................................................................................................................................. 5
7 Start-UP .............................................................................................................................................6
7.1 General Information ................................................................................................................................... 6
7.2 Preparation ................................................................................................................................................ 6
7.3 Procedure .................................................................................................................................................. 6
8 Maintenance / Cleaning....................................................................................................................6
8.1 Maintenance .............................................................................................................................................. 6
8.2 Cleaning the Heating System .................................................................................................................... 7
8.3 Cleaning the Air System ............................................................................................................................ 7
9 Faults / Trouble-Shooting ................................................................................................................7
10 Decommissioning/Disposal.............................................................................................................7
11 Device Information ...........................................................................................................................8
Appendix ............................................................................................................................................... A-I

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1.4
1 Please Read
Immediately
1.1 Important Information:
ATTENTION!
The device is not suitable for operation with a frequency converter.
ATTENTION!
When transporting the heat pump, ensure that it is not tilted more than
45° (in any direction).
ATTENTION!
Do not restrict or block the area around the air intake or outlet.
ATTENTION!
Never use cleaning agents containing sand, soda, acid or chloride as
these can damage the surfaces.
ATTENTION!
We recommend the installation of a suitable corrosion protection system
to prevent the formation of deposits (e.g. rust) in the condenser of the
heat pump.
ATTENTION!
Before opening the device, ensure that all circuits are isolated from the
power supply.
ATTENTION!
Any work on the heat pump may only be performed by authorised and
qualified after-sales service technicians.
1.2 Intended Use
This device is only intended for use as specified by the manufac-
turer. Any other use beyond that intended by the manufacturer is
prohibited. This requires the user to abide by the manufacturers
product information. Please refrain from tampering with or alter-
ing the device.
1.3 Legal Regulations and
Directives
This heat pump is designed for use in a domestic environment
according to Article 1, Paragraph 2 k) of EC directive 2006/42/EC
(machinery directive) and is thus subject to the requirements of
EC directive 2006/95/EC (low-voltage directive). It is thus also in-
tended for use by non-professionals for heating shops, offices
and other similar working environments, in agricultural establish-
ments and in hotels, guest houses and similar / other residential
buildings.
The construction and design of the heat pump complies with all
relevant EU directives, DIN/VDE regulations (see CE declaration
of conformity).
When connecting the heat pump to the power supply, the rele-
vant VDE, EN and IEC standards are to be fulfilled. Any further
connection requirements stipulated by local utility companies
must also be observed.
When connecting the heating system, all applicable regulations
must also be adhered to.
Persons, especially children, who are not capable of operating
the device safely due to their physical, sensory or mental abilities
or due to their inexperience or lack of knowledge, must not ope-
rate this device without supervision or instruction by the person in
charge.
Children must be supervised to ensure that they do not play with
the device.
1.4 Energy-Efficient Use of the
Heat Pump
With the purchase of this heat pump you are helping to protect
the environment. A prerequisite for energy-efficient operation is
the correct design of the heat source system and heating system
(radiators and circulation pump).
It is particularly important for the efficiency of a heat pump to
keep the temperature difference between heating water and heat
source as small as possible. For this reason, it is advisable to de-
sign the heat source and heating system very carefully. A tem-
perature difference of approx. one Kelvin increases the
power consumption by around 2.5 %. When designing the
heating system, it should be borne in mind that special consum-
ers such as e.g. hot water preparation should also be considered
and dimensioned for low temperatures. Underfloor heating
systems (panel heating) are optimally suited for heat pump use
on account of the low flow temperatures (30 °C to 40 °C).
It is important to ensure that the heat exchangers are not con-
taminated during operation because this increases the tempera-
ture difference, in turn reducing the COP.
Correct adjustment of the heat pump manager is also important
for energy-efficient use of the heat pump. Further information can
be found in the heat pump manager's operating instructions.

3
2
2 Purpose of the Heat
Pump
2.1 Application
The air-to-water heat pump is to be used exclusively for the heat-
ing of heating water. It can be used in newly built or previously
existing heating systems.
The heat pump is suitable for mono energy and bivalent opera-
tion down to an external temperature of -20 °C.
Proper defrosting of the evaporator is guaranteed by maintaining
a heating water return flow temperature of more than 18 °C dur-
ing continuous operation.
The heat pump is not designed for the increased heat consump-
tion required when a building is being dried out. The additional
heat consumption should be met using special devices provided
by the customer. If a building is to be dried out in autumn or win-
ter, we recommend installing an additional heating element
(available as an accessory).
ATTENTION!
The device is not suitable for operation with a frequency converter.
2.2 Operating Principle
Surrounding air is drawn in by the ventilator and fed via the evap-
orator (heat exchanger). The evaporator cools the air, i.e. it ex-
tracts heat from it. This extracted heat is then transferred to the
working medium (refrigerant) in the evaporator.
The heat is “pumped” to a higher temperature level by increasing
its pressure with the aid of an electrically driven compressor. It is
then transferred to the heating water using the liquifier (heat ex-
changer).
Electrical energy is used to raise the temperature of the heat in
the environment to a higher level. Because the energy extracted
from the air is transferred to the heating water, this type of device
is called an air-to-water heat pump.
The air-to-water heat pump consists of the main components
evaporator, ventilator and expansion valve, as well as the low-
noise compressor, liquifier and electrical control system.
At low ambient temperatures, humidity accumulates on the evap-
orator in the form of frost reducing the transfer of heat. The evap-
orator is defrosted automatically by the heat pump as required.
Steam may be emitted from the air outlet depending on the at-
mospheric conditions.
3 Scope of Delivery
3.1 Basic Device
The heat pump is of compact design and is supplied complete
with the components listed below.
The refrigerant circuit is hermetically sealed. It contains the
Kyoto protocol approved refrigerant R404A with a GWP value of
3260. It is CFC-free, does not deplete ozone and is non-flamma-
ble.
1) Evaporator
2) Ventilator
3) Filter dryer
4) Switch box
5) Managers
6) Liquifier
7) Collector
8) Compressor
3.2 Switch Box
The switch box is located in the heat pump. It can be swung out
after removing the lower front cover and loosening the fastening
screw located in the upper right-hand corner.
The switch box contains the supply connection terminals as well
the power contactors and the soft starter unit.
The plug connectors for the control line are located on the switch
box panel near the pivotal point.

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5.2
3.3 Heat Pump Manager
Use the heat pump manager included in the scope of supply to
operate the air-to-water heat pump.
The heat pump manager is a convenient electronic regulation
and control device. It controls and monitors the entire heating
system on the basis of the external temperature, including hot
water preparation and safety systems.
The customer must install the return temperature sensor and the
external temperature sensor, which are supplied with the heat
pump manager / with these instructions together with the neces-
sary fixing accessories.
The enclosed operating instructions describe the function and
use of the heat pump manager.
4 Transport
ATTENTION!
When transporting the heat pump, ensure that it is not tilted more than
45° (in any direction).
Use a wooden pallet for transporting the heat pump to the final in-
stallation location. The basic device can be transported with a lift
truck, hand truck or by means of 3/4" pipes fed through the holes
in the base plate or frame.
The heat pump and the transport pallet are joined by four transit
bolts. These must be removed.
Before using the transport holes in the frame, it is necessary to
remove the lower side panel assemblies. This is done by loosen-
ing each of the two screws at the base and then withdrawing the
panels by unhooking them from above. Rehang the panels by
gently pushing them in an upwards direction.
Be careful not to damage any components when inserting the
pipes through the frame.
At the installation location, 8 black dust caps, which are included
in the packaging of the device, must be snapped into the trans-
port holes.
5Set-UP
5.1 General Information
The device should always be installed on a permanently smooth,
even and horizontal surface. The entire frame should lie directly
on the ground to ensure a good soundproof seal and to prevent
the water-bearing components from becoming too cold. If this is
not the case, additional insulation measures may be necessary.
Furthermore, the heat pump should be set up so that the air out-
let direction of the ventilator is perpendicular to the main wind di-
rection to allow unrestricted defrosting of the evaporator. It must
be possible to carry out maintenance work without hindrance.
This is ensured if the clearance displayed below is maintained.
1) Minimum clearances for heat pump function
2) Minimum clearances for maintenance work
ATTENTION!
Do not restrict or block the area around the air intake or outlet.
5.2 Condensed Water Pipe
Condensed water that forms during operation must be drained
off frost-free. To ensure proper drainage, the heat pump must be
mounted horizontally. The condensed water pipe must have a
minimum diameter of 50 mm and should be fed frost-free into a
sewer. Do not discharge the condensate directly into clearing
tanks or cesspits, as aggressive vapours or a condensed water
pipe which has not been laid in a frost-free manner could destroy
the evaporator.
Opening the cover Closing the cover
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