Glen Dimplex LA 1118CP User guide

Order no.: 452171.66.01-EN EN · FD 0212
LA 1118CP
Installation and
Operating Instruction
Air-to-Water
Heat Pump for
Outdoor Installation
Glen
Dimplex
Deutschland
Dimplex

www.dimplex.de 452171.66.01-EN · FD 0212 EN-1
LA 1118CP English
Table of contents
1 Safety notes..................................................................................................................................................EN-3
1.1 Layout of safety notes and identification ................................................................................................................EN-3
1.2 General safety notes .......................................................................................................................................................EN-3
1.3 Intended use......................................................................................................................................................................EN-4
1.4 Legal regulations and directives .................................................................................................................................EN-4
1.5 Energy-efficient use of the heat pump.....................................................................................................................EN-4
2 Intended use of the heat pump ...............................................................................................................EN-5
2.1 Area of application...........................................................................................................................................................EN-5
2.2 Operating principle..........................................................................................................................................................EN-5
3 Scope of supply ...........................................................................................................................................EN-6
3.1 Basic device .......................................................................................................................................................................EN-6
3.2 Connection box ................................................................................................................................................................EN-6
3.3 Heat pump manager .......................................................................................................................................................EN-6
4 Accessories...................................................................................................................................................EN-6
4.1 Building management system.....................................................................................................................................EN-6
5 Transport .......................................................................................................................................................EN-7
6 Installation ....................................................................................................................................................EN-8
6.1 General.................................................................................................................................................................................EN-8
6.2 General requirements for heat pump installed outdoors ...................................................................................EN-9
6.3 Safety zone for 200 mm raised installation.......................................................................................................... EN-10
6.4 Safety zone for floor level installation .................................................................................................................... EN-12
6.5 Condensate pipe for heat pumps with flammable refrigerant ...................................................................... EN-14
7 Assembly .................................................................................................................................................... EN-15
7.1 General.............................................................................................................................................................................. EN-15
7.2 Opening the covering panels.................................................................................................................................... EN-15
7.3 Connection on heating side ...................................................................................................................................... EN-16
7.4 Water quality in heating systems............................................................................................................................. EN-17
7.5 Temperature sensor ..................................................................................................................................................... EN-19
7.6 Electrical connection ................................................................................................................................................... EN-20
8 Commissioning ......................................................................................................................................... EN-21
8.1 General.............................................................................................................................................................................. EN-21
8.2 Preparation...................................................................................................................................................................... EN-21
8.3 Procedure ........................................................................................................................................................................ EN-21
9 Cleaning work ........................................................................................................................................... EN-22
9.1 General.............................................................................................................................................................................. EN-22
9.2 Cleaning the heating system .................................................................................................................................... EN-22
9.3 Cleaning the air system............................................................................................................................................... EN-22
10 Care.............................................................................................................................................................. EN-23
11 Faults/troubleshooting/repair.............................................................................................................. EN-23
11.1 Refrigerant handling .................................................................................................................................................... EN-24
12 Decommissioning/disposal ................................................................................................................... EN-25
13 Device information .................................................................................................................................. EN-26
14 Product information as per Regulation (EU) No 813/2013, Annex II, Table 2........................... EN-28
15 Dimension drawings................................................................................................................................ EN-29
15.1 Dimension drawing....................................................................................................................................................... EN-29
15.2 Dimension drawing legend........................................................................................................................................ EN-30
16 Diagrams .................................................................................................................................................... EN-31
16.1 Heating curve ................................................................................................................................................................. EN-31
16.2 Cooling curve ................................................................................................................................................................. EN-35
16.3 Heating operating limit................................................................................................................................................ EN-36
16.4 Cooling operating limit................................................................................................................................................ EN-37

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English LA 1118CP
17 Integration Diagram................................................................................................................................. EN-38
17.1 Hydraulic integration diagram .................................................................................................................................. EN-38
17.2 Hydraulic integration diagram .................................................................................................................................. EN-39
17.3 Legend.............................................................................................................................................................................. EN-40
18 Declaration of conformity ...................................................................................................................... EN-41

www.dimplex.de 452171.66.01-EN · FD 0212 EN-3
LA 1118CP English
1Safetynotes
1.1 Layout of safety notes and
identification
The safety notes in the text provide warnings about potential
hazards before the beginning of an instruction.
The safety instructions have the following structure:
DANGER!
Direct risk of death or serious personal injury.
WARNING!
Risk of minor to serious personal injury
CAUTION!
Risk of minor injury or damage to property or the environment
NOTE
º
ºººº
Risk of damage to property or minor personal injury or
important information with no further risk of personal injury
or damage to property.
1.2 General safety notes
The following warnings and safety notes must be observed in
all life phases of the device:
DANGER!
Risk of death due to fire or explosion.
The device contains flammable refrigerant (R290). In case of
leakage, the refrigerant can mix with the ambient air and form
a flammable atmosphere.
Work on the heat pump is only to be carried out by people
with the knowledge set out in Fig. 1.1 on page 4.
Avoid ignition sources (naked flames, hot surfaces,
electrical equipment with ignition sources and static
discharge) and fire loads in the safety zone
WARNING!
Risk of injury and damage to property due to improper
handling.
Work on the heat pump is only to be carried out by people
with the knowledge set out in Fig. 1.1 on page 4.
DANGER!
Risk of death due to electric shock.
If the device is not fitted with all covering panels there is a risk
of electric shock.
Disconnect all electric circuits from the power source
prior to opening the device.
WARNING!
Risk of injury.
When working on the device without protective equipment,
injuries can occur, e.g. cuts.
Use of personal protective equipment (PPE) in
accordance with DGUV regulation 100-500 Chap. 2.35
Personal protective equipment consisting of safety
gloves, safety shoes, safety glasses and long clothing that
fully covers the body.
WARNING!
Risk of injury due to falling or slipping.
Trip hazards and leaked operating materials result in a risk of
injury due to falling or slipping.
Trip hazards caused by cables, pipes and hoses must be
avoided.
Operating material leaks must be absorbed with suitable
binding agents and disposed of in accordance with the
hazard class.
DANGER!
Risk of death due to electric shock.
There is a risk of electric shock from contact with live parts.
National and regional regulations on accident prevention
and carrying out electrical installations must be observed.
The following five safety rules should be used during
electrical installation:
- Disconnect from mains,
- Secure against reconnection,
- Confirm absence of voltage at all poles,
- Ground and short-circuit,
- Cover or cordon off neighbouring areas that are live.
After disconnecting the power supply, you have to wait 5
minutes before all components are de-energised.
Only operate the heat pump with safety equipment
(casing, grating).
DANGER!
Risk of death due to fire or explosion.
The device contains flammable refrigerant (R290). Alterations
or modifications to the device can cause uncontrolled
conditions that can lead to refrigerant leakage.
Please refrain from modifying or altering the device.
Meaning
1Signal word (DANGER, WARNING,
CAUTION or NOTE)
2Nature and source of the hazard, description
of the hazard and its cause
3
Consequence: Description of the possible
consequences for people, animals and the
environment that can occur due to the haz-
ard
4Escape: Recommended actions for averting
hazards

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1.3 Intended use
This device is only intended for use (see chap. 2) as specified by
the manufacturer. Any other use beyond that intended by the
manufacturer is prohibited. This requires the user to abide by
the relevant project planning documents. Please refrain from
modifying or altering the device.
1.4 Legal regulations and directives
The construction and design of the heat pump comply with all
valid EU directives, DIN and VDE regulations (see CE Declara-
tion of conformity).
When connecting the heat pump to the power supply, the rele-
vant VDE, EN and IEC standards must be complied with. Any
further connection requirements stipulated by local utility com-
panies must also be observed.
When connecting the heating system, the applicable regula-
tions must be complied with.
The device is filled with flammable refrigerant R290 (propane)
and is only intended for outdoor installation. Suitable safety
measures must be implemented for installation, assembly, op-
eration and disposal.
Work on the heat pump must only be carried out by people with
the following knowledge. Use by people who have not been in-
structed is not permissible.
Fig. 1.1:Phases and authorised persons
WARNING!
Risk of injury and damage to
property due to improper handling.
Work on the heat pump is only to be carried out by people
with the knowledge set out in Fig. 1.1 on page 4.
NOTE
º
ºººº
When operating a heat pump, the legal requirements of the
country where the heat pump is operated must be complied
with.
This device can be used by children aged 8 and over and by
persons with limited physical, sensory or mental aptitude or
lack of experience and/or knowledge, providing they are super-
vised or have been instructed in safe use of the device and un-
derstand the associated potential dangers.
Children must not play with the device. Cleaning and user
maintenance must not be carried out by children without su-
pervision.
1.5 Energy-efficient use of the heat
pump
By operating this heat pump, you are helping to protect the en-
vironment. A prerequisite for energy-efficient operation is the
correct design of the heat source system and heating system.
To maintain heat pump efficiency, it is particularly important to
keep the temperature difference between the heating water
and heat source to a minimum. For this reason, it is advisable to
design the heat source and heating system very carefully. A
temperature difference that is higher by 1 Kelvin (1°C) in-
creases the power consumption by around 2.5%. When de-
signing the heating system, it should be borne in mind that spe-
cial consumers such as domestic hot water preparation should
also be taken into consideration and dimensioned for low tem-
peratures. 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, as this increases the temperature
difference, which in turn reduces the coefficient of perfor-
mance (COP).
When set correctly, the heat pump manager is also an essential
factor in the energy-efficient use of the heat pump. Further in-
formation can be found in the heat pump manager operating
instructions.
Activity Instructed per-
sons
Qualified spe-
cialist
Authorised and
qualified after-
sales service tech-
nician
Transport, storage X X
Installation X X
Assembly X X
Commissioning X
Operation X X X
Cleaning work X X
Care X X x
Faults / troubleshoot-
ing / repair X X
Decommissioning /
disposal X

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LA 1118CP English
2 Intended use of the heat
pump
2.1 Area of application
The air-to-water heat pump is to be used exclusively for the
heating and cooling of heating water. It can be used in new or
existing heating systems.
The heat pump is designed exclusively for outdoor installation.
The instructions in the chapter "Installation" must be observed.
The circulating pump(s) must be controlled using the heat
pump manager.
If pump functions relevant to the overall function or to safety
are not supported, e.g. due to integration of the heat pump into
a building management system, this results in the warranty
being void and can lead to damage to the heat pump.
The circulating pump(s) and the heat pump controller must al-
ways be ready for operation.
The specifications in the technical documents must be fol-
lowed, particularly limit values for the minimum and – if availa-
ble – maximum warm/cold water volume flow.
The heat pump is suitable for mono energy and bivalent opera-
tion in outside air temperatures to -22°C.
Proper defrosting of the evaporator is guaranteed by maintain-
ing a heating water return temperature of more than 20 °C dur-
ing continuous operation. The maximum water outlet tempera-
ture must not exceed 65°C and must be secured on the system
side so that, if the temperature is exceeded, all additional heat
sources are switched off safely.
The heat pump is not designed for the increased heat con-
sumption required when a building is being dried out. For this
reason, the additional heat consumption should be met using
special devices provided by the customer. For drying out a
building in autumn or winter, it is advisable to install a suitable
2nd heat generator (e.g. an electric heating element available as
an accessory).
In cooling operation, the heat pump is suitable for air tempera-
tures ranging from +15°C to +45°C.
It can be used for silent and dynamic cooling. The minimum
cooling water outlet temperature is +12°C.
CAUTION!
Use of a 4-way valve on the heating water side can cause
damage to the device.
A 4-way valve must not be used on the heating water side
2.2 Operating principle
Heating with the heat source air
Surrounding air is drawn in by the fan and fed through the evap-
orator (heat exchanger). The evaporator cools the air, i.e. 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 increas-
ing its pressure with the aid of the electrically driven compres-
sors. It is then transferred to the heating water via the liquefier
(heat exchanger).
Electrical energy is used to raise the temperature level of the
heat from the environment. Since the energy extracted from
the air is transferred to the heating water, this type of device is
referred to as an air-to-water heat pump.
The air-to-water heat pump consists of the main components
evaporator, fan and expansion valve, as well as the low-noise
compressors, the liquefier and the electrical control system.
At low ambient temperatures, humidity accumulates on the
evaporator in the form of frost, reducing the transfer of heat.
Uneven accumulation during this process does not indicate a
fault. The evaporator is defrosted automatically by the heat
pump as required. Under certain atmospheric conditions,
steam may be emitted from the air outlet.
Cooling
The functions of the evaporator and the liquefier are reversed in
the "Cooling" operating mode.
The heating water transfers its heat to the refrigerant via the liq-
uefier, which is now functioning as an evaporator. The refriger-
ant is brought to a higher temperature level using the compres-
sor. Heat is transferred to the surrounding air via the liquefier
(which, in heating operation, functions as an evaporator).

EN-6 452171.66.01-EN · FD 0212 www.dimplex.de
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3 Scope of supply
3.1 Basic device
The heat pump contains the components listed below.
R290 (propane) is used as refrigerant.
1) Evaporator, air
2) Liquefier
3) Fan
4) Switch box
5) Connection box
6) Compressor
7) Filter dryer
8) Expansion valve
9) 4-way reversing valve
10) Separator
11) Collector
12) Ventilator
13) Dirt trap
14) Flow rate sensor
3.2 Connection box
The connection box (5) contains the supply connection termi-
nals (load/control voltage) and the connecting terminals for the
communication line.
NOTE
º
ºººº
Connection work must only be carried out on the connection
box.
3.3 Heat pump manager
A heat pump manager (controller -N1) must be used for operat-
ing your heat pump.
The heat pump manager is a convenient electronic regulation
and control unit. It controls and monitors the entire heating sys-
tem based on the outside temperature, as well as domestic hot
water preparation and operating limits.
The external temperature sensor to be mounted on-site is in-
cluded in the heat pump manager scope of supply together
with the necessary fixing accessories.
The functions and usage of the heat pump manager are de-
scribed in the operating instructions supplied with it.
4 Accessories
4.1 Building management system
The heat pump manager can be connected to a building man-
agement system network via supplementation of the relevant
interface plug-in card. The supplementary installation instruc-
tions of the interface card must be consulted regarding the
exact connection and parametrisation of the interface.
The following network connections can be made on the heat
pump manager:
Modbus
EIB, KNX
Ethernet
5
2
4
3
1
6
7
8
9
10
11
12
14
13

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LA 1118CP English
5Transport
DANGER!
Risk of death due to fire and explosion.
If there is a leakage of the propane refrigerant during
transportation, an ignitable atmosphere can form in the
transport vehicle.
An adequate air supply must be ensured during
transportation.
For transportation in a small transporter connected to the
passenger compartment, avoid ignition sources such as
sparks or smoking and ensure adequate ventilation.
WARNING!
Risk of injury due to tipping.
The machine must be secured to prevent tipping.
DANGER!
Risk of death due to fire and explosion.
If a leakage occurs during transportation or storage, an
ignitable atmosphere can form.
The device must only be stored in rooms with no
permanent ignition sources.
Where possible, store the heat pump above ground and
ensure adequate ventilation.
DANGER!
Risk of death due to fire and explosion.
If there is a leakage of the propane refrigerant due to a fault,
an ignitable atmosphere can form.
Avoid ignition sources and fire loads in the safety zone.
Keep the casing closed.
DANGER!
Risk of death due to fire and explosion hazard.
Flammable refrigerant may leak if the heat pump falls or is
subject to impact loads during transportation.
Protect against mechanical damage during
transportation.
The heat pump must be checked immediately for
leakages if it falls or is subject to impact loads during
transportation.
Avoid setting down the system heavily.
If outflow noises can be heard, if oily surfaces form or if a
leakage can be detected with a detector, the refrigerant
must be drained off by a person trained in handling of
propane.
Ignition sources in the area around the device must be
avoided until the draining is safely completed. If the
leakage occurs inside a building, the affected area must
be ventilated immediately.
The heat pump must be returned to the manufacturer for
repair if it is not possible to remedy the leakage on site.
DANGER!
Risk of death due to lightning.
Standing outside during a storm can result in a risk of death.
Do not stand in the immediate vicinity of the heat pump.
Transportation, including all related activities such as lifting,
loading, lowering, unloading and unpacking, must be carried
out by trained personnel.
The transport routes must be cleared and suitable agents must
be spread if necessary (for defrosting or increasing grip).
Only use suitable transport equipment. The carrying capacity of
the load suspension device (slings and straps) must be ob-
served.
Personal protective equipment must be used when transport-
ing and removing the transport packaging in accordance with
DGUV regulation 100-500 Chap. 2.35
The pallet should be used for transportation to the final installa-
tion location. The device can also be carried using slings or
straps fed between the baseplate and the floor brackets. (see
figure)
After transportation, the transport fastening in the device is to
be removed from both sides of the base.
NOTE
º
ºººº
Before commissioning, the transport fastening must be
removed.
Remove
transport lock

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English LA 1118CP
6Installation
6.1 General
These specifications have priority during installation and opera-
tion of the system and must be complied with. The responsibil-
ity for this lies with the specialist system construction company.
The heat pump, especially its refrigeration circuit, must be pro-
tected against damage (e.g. drilling, burning etc.) during instal-
lation and other construction activities.
DANGER!
Risk of death due to fire and explosion.
If there is a leakage of the propane refrigerant due to a fault,
an ignitable atmosphere can form.
Avoid ignition sources and fire loads in the safety zone.
Keep the casing closed.
The heat pump is not an ignition source.
DANGER!
Risk of death due to fire and explosion.
If there is a leakage of the propane refrigerant due to a fault,
an ignitable atmosphere can form, especially in hollows,
shafts or areas with no free air outflow or air exchange.
Installation in hollows, shafts or areas with no free air
outflow or air exchange is not permitted.
DANGER!
Risk of death due to fire and explosion.
In the very unlikely event that propane gets into the heating
circuit, an ignitable atmosphere can form due to mixing with
the surrounding air.
The minimum volume of the room in which the hydraulic
system - comprising the safety group, automatic air vent
and buffer - is installed must not be less than 12 m³.
NOTE
º
ºººº
Observe country-specific building regulations.
NOTE
º
ºººº
The responsibility for heat pump installation lies with the
specialist system construction company.
NOTE
ººººº
Once the heat pump has been commissioned by an
authorised and qualified after-sales service technician, the
responsibility for the intended operation of this heat pump
lies with the operator.
NOTE
º
ºººº
The heat pump is not intended for use above 2000 metres
(mean sea level).

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6.2 General requirements for heat
pump installed outdoors
The heat pump device must be installed on a suitably stable
foundation or on a permanently level, smooth and horizontal
surface. The heat pump can be installed raised by 200 mm (see
Chap. 6.3 on page 10) or level with the ground (see Chap. 6.4
on page 12).
Furthermore, the heat pump should be installed so that the air
outlet direction of the fan is perpendicular to the main wind di-
rection to allow proper defrosting of the evaporator in the event
of high wind exposure.
The cover panels on the baseplate in the machine room must
remain sealed with connection to the rear (standard configura-
tion) to guarantee optimum sound insulation and to protect the
interior of the device from small animals.
To enable this to be ensured with vertical connection of the
heat pump (optional accessories), it is essential to ensure that
all panels are fitted on the installation shaft when assembly
work is complete.
For installations on a foundation with direct contact to the
building, vibration insulation must be ensured to avoid
transmission of solid-borne noise to the building.
It must be assessed whether lightning protection is re-
quired and, if necessary, implemented.
During the installation, the circumstances at the installa-
tion location, such as building regulations, static load of the
building, wind exposure and lightning protection, must be
taken into account.
If the installation is close to walls, it must be noted that
there may be more contamination in the intake and air out-
let area due to the air flow. For installation close to walls,
the heat pump must be able to blow out air freely for en-
ergy reasons.
When installing multiple heat pumps, the safety zone 
must be established around the entire group of heat
pumps.
To carry out maintenance work, a service area with the
clearances shown must be kept freely accessible. When in-
stalling multiple heat pumps, observe the service clear-
ances between the individual heat pumps.
Installation on the roof is permitted. The safety clearances
indicated must be adhered to.
When using heat pumps close to the sea, the high salt con-
tent in the air may lead to increased corrosion. The use of
heat pumps is safe from a distance of 12 km from the sea
with a maximum salt content of 3.5%.
For shorter distances, refer to the more detailed distance
calculation in the project planning manual
The device must not be exposed to corrosive or perma-
nently dusty air. (e.g. close to stables). The air containing
dust and / or ammonia can cause permanent damage to
the device.
DANGER!
Risk of death due to fire and explosion.
If there is a leakage of the propane refrigerant due to a fault,
an ignitable atmosphere can form.
Install the heat pump in such a way that in the event of a
leakage no refrigerant can get into the building.
Empty conduits, openings etc. that lead into the building,
shafts etc. must be fitted with an air tight seal.
Empty conduits, openings etc. that lead into the building, shafts
etc. must be fitted with an air tight seal.
If other equipment is installed inside the safety zone these
components located in the safety zone must not represent an
ignition source or fire load.
NOTE
º
ºººº
Do not restrict the air intake and air outlet area of the fan.
CAUTION!
If the heat pump takes in cooled air close to the ground, this
can cause damage or reduced efficiency.
Do not install the device in depressions or courtyards.
DANGER!
Risk of death due to fire and explosion.
Damage to the refrigeration circuit during construction work
can result in leakage of the propane refrigerant. This can
cause an ignitable atmosphere.
Protect the heat pump from damage during installation
and other construction work.
NOTE
º
ºººº
Structural influences must be observed for installation close
to walls. No windows or doors should be present in the area
surrounding the air outlet of the fan.
NOTE
º
ºººº
In cases of installation close to walls, there may be more
sediment in the intake and air outlet area due to the air flow.
The colder outside air outlet should discharge in such a way as
to not increase the heat losses in heated neighbouring rooms.

EN-10 452171.66.01-EN · FD 0212 www.dimplex.de
English LA 1118CP
6.3 Safety zone for 200 mm raised
installation
If the device is raised above the installation surface by 200 mm
using a strip footing or other suitable method, a safety zone 
of 1 metre must be maintained all the way around the device.
There must not be any ignition sources such as sockets, light
switches, lamps, electrical switches or other permanent ignition
sources, windows doors, ventilation openings, light wells, drain-
age openings and similar in this zone. Fire loads must also be
avoided. Open drains to a lower level are permitted providing
there are no openings into the sewer system within 1 metre
around them. Building openings must be made airtight within
the safety zone. The safety zone must not protrude onto neigh-
bouring property or public traffic areas. The device must be po-
sitioned so that in the event of a leakage no refrigerant can get
into neighbouring buildings.
If the device is to be installed on a continuous foundation, a cut-
out in the area of the condensate outlet is recommended to
allow connection work on the condensate drain to be carried
out with no problems.
No structural modifications are to be made in the safety zone
that could violate the integrity of the safety zone.
Fig. 6.1:Safety zone (raised installation) around the heat pump
1
1000 1420 1000
2001115
2
11000 1000
300
1000
800

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LA 1118CP English
Fig. 6.2:Safety zone (raised installation) for installation in a corner
Fig. 6.3:Safety zone (raised installation) for installation in open space
1
2
300
800
1000
1000
800
1
2
1000
800

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English LA 1118CP
6.4 Safety zone for floor level
installation
If the device is installed at floor level, a safety zone of 2 me-
ters must be observed all the way around the device. There
must not be any ignition sources such as sockets, light
switches, lamps, electrical switches or other permanent ignition
sources, windows doors, ventilation openings, light wells, drain-
age openings and similar in this zone. Fire loads must also be
avoided. Open drains to a lower level are permitted providing
there are no openings into the sewer system within 2 metre
around them. Building openings must be made airtight within
the safety zone. The safety zone must not protrude onto neigh-
bouring property or public traffic areas. The device must be po-
sitioned so that in the event of a leakage no refrigerant can get
into neighbouring buildings.
No structural modifications are to be made in the safety zone
that could violate the integrity of the safety zone.
Fig. 6.4:Safety zone (floor level installation) around the heat pump
1
825
1420
825
1115
2000 2000
200
2
1
2000 2000
300
2000
800

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LA 1118CP English
Fig. 6.5:Safety zone (floor level installation) for installation in a corner
Fig. 6.6:Safety zone (floor level installation) for installation in open space
1
2
300
800
2000
2000
800
1
2
800
2000

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English LA 1118CP
6.5 Condensate pipe for heat
pumps with flammable
refrigerant
Frost-free condensate discharge must be guaranteed. To en-
sure proper drainage, the heat pump must stand horizontally.
NOTE
º
ºººº
The frost line may vary according to the climatic region.
The regulations of the countries in question must be
observed.
Version 1
The condensate, which accumulates during operation, must be
drained vertically into a base filled with gravel. A daily seepage
capacity of at least 1.5 litres per kW heat output of the heat
pump shall be provided and the diameter of the condensate
water pipe should be at least 50 mm.
Fig. 6.7:Condensate drain in gravel
NOTE
º
ºººº
The condensate water pipe must be installed vertically to
prevent it from freezing in winter. If the condensate pipe is
exposed to frost, trace heating must be provided.
Version 2
The condensate is channelled into a sewer, rainwater or drain-
age channel via a condensate pipe in the ground. The conden-
sate pipe contains a siphon below the frost line . The water
level in the siphon prevents the refrigerant from getting into the
channel if there is a leakage. Pumping systems are impermissi-
ble! The siphon must have a minimum sealing liquid level of
300 mm.
Fig. 6.8:Condensate pipe in channel over siphon
Version 3
Free discharge is only advisable in climate zones with short
frost periods. In colder climate zones, the condensate pipe in
areas at risk from frost must be fitted with a suitably dimen-
sioned and regulated electrical trace heating on the insulated
condensate pipe.
Version 4
The condensate pipe may lead into the building. The wall open-
ing must be air tight. Inside the building, the pipe connection to
the waste water pipe must be equipped with a siphon. The si-
phon must be protected against drying out. If this is not possi-
ble, a siphon that closes when it runs dry must be fitted. Lifting
units are not permitted.
4
4

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LA 1118CP English
7 Assembly
7.1 General
The following connections need to be established on the heat
pump:
Heating system flows and returns
Condensate drain
Communication line to the heat pump manager (controller
-N1)
Power supplies (load/control voltage)
NOTE
º
ºººº
When setting up and installing the heat pump system, it must
be ensured that the heat pump casing is intact and any
tampering with the heat pump casing must be refrained from.
In particular, misuse of the heat pump casing (e.g. as a
mounting or similar) must be prevented.
DANGER!
Risk of death due to lightning.
Standing outside during a storm can result in a risk of death.
Do not stand in the immediate vicinity of the heat pump.
DANGER!
Risk of death due to electric shock.
There is a risk of death when working on the electrical
equipment or live components in wet weather conditions
(precipitation, snow).
In case of precipitation, the device must be properly
closed.
WARNING!
Risk of injury.
When working on the device without protective equipment,
injuries can occur, e.g. cuts.
Use of personal protective equipment (PPE) in
accordance with DGUV regulation 100-500 Chap. 2.35
Personal protective equipment consisting of safety
gloves, safety shoes, safety glasses and long clothing that
fully covers the body.
7.2 Opening the covering panels
7.2.1 Opening the grid panels
Removing the grid panels on the front and rear:
Loosen the screws at the top of the corresponding panel
(1).
Tilt the upper panel approx. 30° forwards (2)
Pull the panel diagonally upwards out of the pedestal (3)
Fig. 7.1:Opening the grid panels
7.2.2 Opening the side covering panels
Removing the side covering panels:
Loosen the screws at the top of the corresponding panel
(1)
Tilt the upper panel approx. 30° forwards (2)
Fig. 7.2:Opening the side covering panels, work step 1 and 2
In the tilted position, slide the panel approx. 40 mm to the
right as far as it will go (3)
Fig. 7.3:Opening the side covering panels, work step 3
1.
3.
1.
3.
2.
1.
1.
2.
3.

EN-16 452171.66.01-EN · FD 0212 www.dimplex.de
English LA 1118CP
In this position, pull the panel diagonally upwards out of
the pedestal (4)
Fig. 7.4:Opening the side covering panels, work step 4
7.2.3 Opening the machine room covering
panels
Removing the machine room front and rear panel:
Loosen the screws at the top of the corresponding panel
(1)
Tilt the upper panel approx. 55° forwards (2) to enable it to
be pushed past the profiles of the adjacent side panels.
Fig. 7.5:Opening the machine room covering panels, work step 1 and 2
In the tilted position, slide the panel approx. 40 mm to the
right as far as it will go (3) (see Fig. 7.3)
In this position, pull the panel diagonally upwards out of
the pedestal (4) (see Fig. 7.4)
7.2.4 Opening the inspection cover
To access the space between the evaporator and the fan:
Remove the grid panel on the fan side (see Chap. 7.2.1 on
page 15)
Loosen and remove the screw-in blind rivets with a screw-
driver.
Remove the cable cover plate
Loosen and remove the screw-in blind rivets. Remove the
inspection cover
7.3 Connection on heating side
Refer to the device information for the connection sizes.
After the heat pump has been installed, the ductwork must be
sealed so that the connection is gas-tight.
CAUTION!
If the heating system is not flushed, impurities, sealing
material residue or similar can cause damage to the liquefier
and thus result in total failure.
Flush the heating system adequately prior to connecting
the heat pump.
Once the heat pump has been connected to the heating sys-
tem, it must be filled, purged and pressure-tested.
The tightness of the hydraulic circuit must be ensured.
NOTE
º
ºººº
Pump units with check valves maintain the specified flow
direction. If there is incorrect distribution or breaking off of
the volume flow, these units (and the check valves in
particular) must be checked! The use of check valves is
mandatory in the event of several heating circuits or parallel
connections for heat pumps in order to avoid incorrect
distribution.
A
4.
4.
1.
2.
1.

www.dimplex.de 452171.66.01-EN · FD 0212 EN-17
LA 1118CP English
7.4 Water quality in heating
systems
7.4.1 Scale formation
Scale formation in heating systems cannot be avoided, but in
systems with flow temperatures below 60 °C the problem is so
small that it is negligible. With high-temperature heat pumps
and in particular with bivalent systems in the higher perfor-
mance range (heat pump + boiler combination), flow tempera-
tures of 60°C and more can be achieved. One preferred
method for preventing scale formation is softening because
this permanently removes alkaline earths (calcium and magne-
sium ions) from the heating system.
The following values for water quality in heating water and cold
water must be observed and checked during an on-site check:
Degree of hardness
Conductivity
pH value
Filterable materials
The following (limit) values must absolutely be observed:
Maximum degree of hardness of filling water and supple-
mentary water 3 dGH.
The conductivity of demineralised water (DM water) (low-
salt) may not be greater than 100 μS/cm.
The conductivity of partially demineralised water (saline)
may not be greater than 1500 μS/cm.
The pH value must be between 7.5 and 9.
The limit value for filterable materials in heating water is <
30 mg/l.
If necessary, for example in bivalent systems, the specifications
listed in the table below must also be observed, or the precise
guidelines for filling water and supplementary water and the
total hardness must be taken from the table in accordance with
VDI 2035 – Sheet 1.
NOTE
º
ºººº
The specific volumes of a heating system must be determined
before filling the system.
The saturation index SI is used to determine whether water has
a tendency towards lime dissolution or lime separation. This
shows whether the pH value corresponds to a neutral pH point
or by how much it undershoots it due to excess acid or by how
much it exceeds it due to carbonic acid deficit. At a saturation
index below 0, the water is aggressive and will tend towards
corrosion. At a saturation index above 0, the water is calcare-
ous.
The saturation index SI should be between - 0.2 < 0 < 0.2
Fig. 7.6:Guideline values for filling and supplementary in accordance with
VDI 2035
CAUTION!
Non-compliance with the specified limit values for the
heating water can lead to damage.
The minimum permitted pH value of 7.5 must be
observed.
The specified limit values for water quality must be
ensured.
7.4.2 Corrosion
The VDI 2035 standard recommends the use of partially demin-
eralised water or demineralised water in systems with larger-
than-average specific system volumes of 50 l/kW.
These measures (e.g. pH stabilizers) are implemented to set the
pH value of the heating water to minimise the risk of corrosion
in the heat pump and in the heating system.
Irrespective of the legal requirements, the following limit values
in the heating water used for various substances must not be
undershot or exceeded. This is to ensure safe operation of the
heat pump. A water analysis must be carried out before com-
missioning the system. If the water analysis produces a "-" for a
maximum of one indicator or a "o" for a maximum of two indica-
tors, the analysis must be classed as negative.
Filling and supplementary water as well as heating water, depending on
heat output
Overall heat output in kW
Total alkaline earths in mol/m³
(total hardness in dGH)
 20 20 to £ 50 50
Specific system volume in l/kW
Heat output 1
1. For the purpose of calculating the specific system volume, the smallest indi-
vidual heat output is to be used for systems with several heat generators.
50
Specific water content
heat generator > 0.3 k per kW 2
2. In systems with several heat generators with different specific water con-
tents, the smallest specific water content is decisive.
none 3.0 (16.8)
< 0.05 (0.3)
50
Specific water content
heat generator > 0.3 k per kW 2
(e.g. circulation water heaters)
and systems with electrical
heating elements
3.0 (16.8) 1.5 (8.4)
> 50 kW to 200 kW 2.0 (11.2) 1.0 (5.6)
> 200 kW to 600 kW 1.5 (8.4)
< 0.05 (0.3)
> 600 kW < 0.05 (0.3)
Heating water, depending on heating output
Operating mode Electrical conductivity in µS/cm
Low-salt 3
3. Full softening is recommended for systems with aluminium alloys.
> 10 to 100
Containing salt > 100 to 1500
Appearance
clear, free from sedimentary substances

EN-18 452171.66.01-EN · FD 0212 www.dimplex.de
English LA 1118CP
Fig. 7.7:Limit values for the quality of heating water
Resistance of copper-soldered or welded stainless-steel plate
heat exchangers to the substances present in water:
Notes
"+" = Normally good resistance
"o" = Corrosion problems may arise,particularly if several
factors receive an evaluation of "o"
"-" = Should not be used
NOTE
º
ºººº
The water quality should be checked again after 4 to 6 weeks,
as the quality could change during the first few weeks of
operation due to chemical reactions.
Important!
The notes/settings in the instructions of the heat pump man-
ager must always be observed and carried out accordingly; not
doing so will lead to malfunctions. The maximum water outlet
temperature must not exceed 65°C and must be secured on
the system side so that, if the temperature is exceeded, all addi-
tional heat sources are switched off safely.
Minimum and maximum heating water flow rate
The minimum heating water flow rate through the heat pump
must be assured in all operating statuses of the heating system.
For example, this can be accomplished by installing a dual dif-
ferential pressureless manifold.
The maximum flow rate must not be exceeded.
The specified nominal flow rate (Chap. 13 on page 26) must be
assured in all operating states. A built-in flow rate sensor moni-
tors the necessary minimum flow rate.
Frost protection
On heat pump systems where protection from frost cannot be
guaranteed, there must be an option for draining the system
(see figure). The frost protection function of the heat pump
manager is active whenever the heat pump manager and the
heat circulating pump are ready for operation. The system must
be drained if the heat pump is taken out of service or in the
event of a power failure.
Evaluation characteristic
Concentration
range
(mg/l or ppm)
Stain-
les
s
ste
el
Copper
Bicarbonate (HCO3)< 70 + o
70 - 300 ++
> 300 + o/+
Sulphate (SO42)< 70 + +
70 - 300 + o/-
> 300 o -
Hydrogen carbonate
HCO3- / SO42-
> 1.0 + +
< 1.0 + o/-
Electrical conductivity < 10 µS/cm + o
10 - 500 µS/cm + +
> 500 µS/cm + o
pH value < 6.0 o o
6.0 - 7.5 o/+ o
7.5 - 9.0 + +
> 9.0 + o
Ammonium (NH4+)< 2 + +
2 - 200 + o
> 200 + -
Chloride ions (Cl-)< 150 + +
> 150 o o/+
Chlorine (Cl2)< 0.5 + +
1 - 5 + o
> 5 o/+ o/-
Hydrogen sulphide (H2S) < 0.05 + +
> 0.05 + o/-
Carbon dioxide (CO2)< 5 + +
5 - 20 + o
> 20 + -
Nitrate (NO3)< 100 + +
> 100 + o
Iron (Fe) < 0.2 + +
> 0.2 + o
Aluminium (Al) < 0.2 + +
> 0.2 + o
Manganese (Mn) < 0.1 + +
> 0.1 + o
Saturation Index > -0.2 + +
< 0.2 + +
1
2