Dimplex LA 8MR, LA 16TR, LA 6MR, LA 10MR, LA 12TR User Manual
CE
INSTALLATION and OPERATING
INSTRUCTIONS
Air-to-Water Heat Pump
for Outdoor installation
LA 6MR LA 12TR
LA 8MR LA 16TR
LA 10MR
Order No.: 452159.67.07 FD 8602
CONTENTS
1 READ IMMEDIATELY 3
1.1 Important Information
1.2 Legal Provisions and Guidelines
1.3 Energy-Efficient Use of the Heat Pump
2 PURPOSE OF HEAT PUMP 4
2.1 Field of Application
2.2 Principle of Operation
3 SCOPE OF DELIVERY 4
3.1 Baseline Unit
3.2 Control Box
4 TRANSPORT 5
5 INSTALLATION 5
5.1 General
5.2 Condensate Line
6 MOUNTING 6
6.1 General
6.2 Heating-Side Connection
6.3 Electrical Connection
7 COMMISSIONING 7
7.1 General
7.2 Preparatory Steps
7.3 Procedure
8 FUNCTIONAL DESCRIPTION 8/9
8.1 Heat Pump Remote Control Unit
8.2 Control Board
8.3 Heating Function
8.4 Cooling Function
8.5 Domestic Hot Water Function
9 CLEANING / CARE 9/10
9.1 Care
9.2 Cleaning of Heating Side
9.3 Cleaning of Air Side
10 MALFUNCTIONS / TROUBLE-
SHOOTING 10
11 DECOMMISSIONING 10
11.1 End-of-Life Decommissioning / Disposal
12 APPENDIX FF
2
READ IMMEDIATELY
READ IMMEDIATELY
1
1.1 Important Information
CAUTION!
electrical circuits have been disconnected from the
power supply.
CAUTION!
not be tilted more than 45° (in either direction).
CAUTION!
only connected by the packaging film.
CAUTION!
openings must neither be constricted nor
obstructed.
CAUTION!
case of multiphase units) must be observed: Damage
to the compressor may be incurred if it is operated
in the wrong sense of rotation.
CAUTION!
containing sand, soda, acid or chloride as these may
damage the surface.
CAUTION!
is imperative that the water circuits be neutralized
after cleaning using appropriate agents.
Do not open the unit unless all
During transport, the heat pump must
Heat pump and transport pallet are
The air intake and discharge
Clockwise phase sequence (in the
Do not use any cleaning agents
To prevent consequential damage it
1.2 Legal Provisions and Guidelines
This heat pump was designed and built in
compliance with all relevant EU directives, DIN and
VDE regulations (see CE Declaration of Conformity).
The electrical connection of the heat pump must be
performed according to and conforming with all relevant VDE, EN and IEC standards. Beyond that, all
technical connection requirements of the local
electrical utility company have to be adhered to.
On connecting the heating system, all relevant
regulations have to be heeded.
1.3 Energy-Efficient Use of the Heat
Pump
By purchasing this heat pump you contribute to the
protection of the environment. A prerequisite for
energy-efficient operation is the proper design of the
heat source system and the heat utilization system.
One of the most important factors of heat pump
efficiency is keeping the temperature difference
between the heating water and the heat source as
small as possible. It is therefore strongly
recommended that the design of both the heat
source system and the heat distribution system be
carried out with great care. A 1 Kelvin (1°C) higher
temperature difference corresponds to an
increase in power consumption of approx. 2.5%.
When designing the heating system care must be
taken that special applications such as domestic
water heating are taken into consideration and
dimensioned for low temperature operation. Heat
pumps are optimally suited for underfloor heating
(surface/radiant heating) applications due to the
low supply temperatures (30 °C to 40 °C).
During operation it is essential that the heat
exchangers are not contaminated as this would
increase the temperature difference resulting in a
lower coefficient of performance.
CAUTION!
with a frequency converter.
CAUTION!
be performed by qualified persons only.
The unit is not suitable for operation
Work on the refrigeration circuit may
3
PURPOSE OF HEAT PUMP
SCOPE OF DELIVERY
PURPOSE OF HEAT
23
PUMP
SCOPE OF DELIVERY
3.1 Baseline Unit
2.1 Field of Application
The air-to-water heat pump is intended for use in
existing or newly built heating systems.
The heat pump is designed for the cooling or heating
of water for heating purposes and the supply of
domestic hot water!
The heat pump is suitable for mono-energetic and
bivalent operation.
During heating mode, a heating water return
temperature of more than 18 °C must be maintained
in order to assure proper defrosting of the
evaporator.
The heat pump is generally not designed for
satisfying any increased heat demand during the
drying phase of new buildings. The additional heat
demand must therefore be met by special appliances
to be supplied on site. For the structural drying of
new buildings during autumn and winter, its is
recommended that an additional electric heating
element (available as an accessory) be installed.
The heat pump is deliverd as a compact unit
containing the components listed below.
The refrigerant used is R407C.
123
4
CAUTION!
with a frequency converter.
The unit is not suited for operation
2.2 Principle of Operation
Ambient air is drawn in by the fan and passed over a
finned heat exchanger, which extracts heat from the
air in the heating mode or gives off heat to the air in
the cooling mode. This energy difference is
transferred to the working fluid (refrigerant) in the
heat exchanger.
With the aid of an electrically driven compressor, the
absorbed heat is "pumped" to a higher temperature
level through pressure increase and - depending
on the particular application (cooling or heating) - is
given off to the heating water or the waste air via the
heat exchanger.
During heating mode, electrical energy is used to
raise the heat of the environment to a higher
temperature level. Due to the fact that the energy
extracted from the air is transferred to the heating
water, this type of appliance is referred to as air-towater heat pump.
The air-to-water heat pump consists of the following
main components: evaporator, fan and expansion
valve as well as the low-noise compressor, a
condenser and the electric control unit.
In the case of low ambient temperatures in the
heating mode, moisture contained in the air may
accumulate on the evaporator in the form of frost
thus impairing the heat transfer. The evaporator is
automatically defrosted by the heat pump, if required.
Vapour pluming may occur at the air outlet depending
on the weather conditions.
98 7 6 5
1) Evaporator 6) Receiver/
2) Control box filter drier
3) Fan 7) Circulat. pump
4) Pressostats 8) Electric heater
5) Expansion vessel 9) Compressor
3.2 Control Box
The control box is integrated in the heat pump. It is
accessible after removal of the cover panel (the
fastening screw holes of the cover panels are
capped).
The control box houses the mains terminals, the
power contactors, the soft start unit as well as the
terminals for the remote control.
The control of the heat pump is effected via the
remote control included in the scope of delivery (see
also section 8.).
4
TRANSPORT
INSTALLATION
TRANSPORT
4
CAUTION!
must not be tilted more than 45° (in either direction).
The unit should be transported to the final
installation site on a wooden pallet. The heat pump
can be transported either by means of a lift truck or
using 3/4" pipes to be passed through the openings
provided in the base plate or in the frame.
During transport, the heat pump
INSTALLATION
5
5.1 General
The unit should always be installed on a
permanently level, smooth and horizontal floor. The
base frame (with its contact surfaces) should make
close contact with the floor in order to prevent any
structure-borne noise from being transmitted. If this
is not possible, additional sound-absorbing
measures might become necessary. It must be
possible to carry out servicing activities without any
problems. This is assured if a clearance of 1.2m is
maintained all around the unit.
1,2 m
1,2 m1,2 m
CAUTION!
are only connected by the packaging film.
When using 3/4" carrying pipes, be sure to secure
them against shifting so as to avoid injuries (to your
hands) during transport!
When slipping the carrying pipes through the frame,
care must be taken that no components (in particular
the plastic condensate pan or the drain pipe socket)
are damaged.
The heat pump and transport pallet
1,2 m
CAUTION!
openings must not be restricted nor obstructed.
The air intake and discharge
5.2 Condensate Line
The condensation water that may collect during
operation must be drained in a place protected from
frost. The heat pump must be positioned horizontally
so that proper discharge can be ensured. The
condensation water pipe must have a minimum
diameter of 50 mm and should be discharged to the
sewer drain in a frost-proof location.
The condensate pipe has to be placed centered
unterneath the drain pipe fitting of the condensate pan
(see also dimensioned drawing in the Appendix). Alternative condensate discharge options have to be
agreed with the manufacturer.
Do not discharge the condensate directly into
septic pits or cesspools as the evaporator is likely
to be destroyed by the aggressive vapours
generated there.
5
MOUNTING
MOUNTING
6
6.1 General
The following connections need to be established
on the heat pump:
- supply/return lines of the heating system
- condensate drain
- control lead to the remote control
- power supply
6.2 Heating-Side Connection
The connections on the heating side of the heat
pump are provided with 1"external thread (flat
sealing). When making the connections to the heat
pump, use a wrench to counterhold at the transitions.
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 any residues of sealing
material, and the like. Any accumulation of deposits
in the condenser may result in a total failure of the
heat pump. On systems equipped with heating water
flow shut-off devices such as radiator or thermostat
valves, an overflow valve, to be provided by the
customer, needs to be installed at the outlet of the
heat pump in a heating system bypass. This assures
a minimum heating water flow through the heat
pump and thus prevents any malfunctions from
occurring.
Once the installation on the heating side has been
completed, the heating system must be filled, deaerated 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
On heat pumps installed in a location prone to frost,
a manual drain valve (see "Hydraulic Block Diagrams"
in the Appendix) should be provided. Properly installed
appliances feature an internal frost protection feature.
If the heat pump is taken out of service or in the event
of a power failure, the system must be drained. In
heat pump installations where a power failure cannot
be readily detected (e.g. holiday houses), the heating
circuit must contain a suitable antifreeze product.
6.3 Electrical Connection
The power connection of the heat pump is effected
via a standard 3-core (for 1-phase units) or a 5-core
(for 3-phase units) cable.
In the case of the 1-phase units, an additional 3-core
cable must be installed for the electric back-up heater.
The cable(s) has (have) to be supplied by the client;
the cross-sectional area is to be selected in
accordance with the power consumption of the heat
pump (see Equipment Data in the appendix) as well
as all relevant VDE (EN) and VNB regulations.
The power supply of the heat pump must be equipped
with an all-pole disconnecting device with a contact
gap of at least 3 mm (e.g. utility company shut-off
contactor, power contactor) as well as a 3-pole circuit
breaker, with simultaneous tripping of all external
conductors (tripping current as stated in the Equipment Data).
- optionally, an additional three-core cable is
required for the domestic hot water supply.
When connecting multiphase units the clockwise
phase sequence of the motor electrical supply must
be assured.
Phase sequence: L1, L2, L3.
CAUTION!
case of multiphase units) must be ensured: Operating
the compressor in the wrong sense of rotation, may
result in damage to the compressor. An incorrect
phase sequence causes the fan to operate in the
wrong sense of rotation leading to a significant
reduction in performance.
The control voltage for the remote control is provided
by the power supply of the unit.
The connecting lead (control lead) from the remote
control to the heat pump (not included in the scope of
delivery) must be suitable for 230 V mains power
supply. The lead must have (at least) 6 cores and the
cross-section of the single cores must be at least 0.5
mm2.
The power supply of the heat pump must be as
specified in the Technical Data of the applicance, i.e.
230 V AC 50 Hz or 3-L/N/PE 400 V.
The connection inside the heat pump is to be effected
using the terminal strips in the control box. For
detailed information refer to the Wiring Diagrams in
the Appendix.
Clockwise phase sequence (in the
6
COMMISSIONING
Heat source temperature
from to
max. difference betwe en
heating water supply and
return temperature
-20 °C -15 °C 4 K
-14 °C -10 °C 5 K
-9 °C -5 °C 6 K
-4 °C 0 °C 7 K
1 °C 5 °C 8 K
6 °C 10 °C 9 K
11 °C 15 °C 10 K
16 °C 20 °C 11 K
21 °C 25 °C 12 K
26 °C 30 °C 13 K
31 °C 35 °C 14 K
7
7.1 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).
7.2 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 6.
- In the heating circuit all valves that could impair
the proper heating water flow must be open.
- The air intake/discharge path must be
unobstructed.
- The sense of rotation of the fan must correspond
to the direction of the arrow.
- An operating mode must have been set on the
remote control.
- Proper condensate drainage must be ensured.
7.3 Procedure
The start-up of the heat pump is effected via the
remote control.
Where an overflow valve is fitted to assure the minimum
heating water flow rate, the valve must be set in
accordance with the specific requirements of the heating
installation. 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 for the "heating
mode":
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.
Typically these are the heating circuits of the rooms
on the building's south and west sides. 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 spread between heating
supply and return flow temperature is obtained, as
indicated in the table that follows. The temperature
spread should be measured as closely to the heat
pump as possible. In mono-energetic systems, the
electric heating element is to be deactivated.
COMMISSIONING
The following procedure must be observed so that
the commissioning activities can be carried out
without any problems:
a) Close all heating circuits.
b) Open the overflow valve all the way.
c) Wait until the buffer tank has reached a
temperature of approx. 25 °C.
d) Subsequently, slowly reopen the valves of the
heating circuits, one after the other, in such a
way that the heating water flow rate is
continually increased by slightly opening the
related heating circuit. When so doing, the
heating water temperature in the buffer tank
must not fall below 20 °C so that the heat pump
can be defrosted at any time.
e) Once all heating circuit are fully open and a
heating water temperature of approx. 20 °C is
maintained in the buffer tank, the minimum flow
rate must be set on the overflow valve and the
heating circulating pump.
7
FUNCTIONAL DESCRIPTION
654321
12
11
78910
FUNCTIONAL
8
DESCRIPTION
8.1 Heat Pump Remote Control Unit
The heat pump can be switched on and off by means
of the remote control positioned inside the building.
Switching off in this case means switching to a
"standby" function, i.e. as long as the heat pump is
supplied with mains power, the frost protection
function of the heat pump remains active. If the water
temperature is too low, first the heating circulating
pump, and if this is not enough, also the compressor
must be put in operation. The remote control allows
you to set the heating or cooling operating mode
(the switchover delay from the heating to the cooling
mode, or vice-versa, is 10 min.) as well as the
temperature level of the heating water.
1) Switch On/Standby
2) LED (green) is illuminated regardless of the
3) Switch "Heating" (left side depressed)
4) Dial for selecting heating water setpoint
12 3
switch position (indicates operational readiness of heat pump)
Switch "Cooling" (right side depressed)
temperature
8.2 Control Board
1) on = compressor is operating
2) on = fan is operating
3) off = reversing valve set to "Heating"
on = reversing valve set to "Cooling" or
"Defrost"
4) on = heating circulating pump is operating
5) off = output backup heater off
6) on = call for frost protection, HP is heating
4
off = call for frost protection off
7) on = low pressure pressostat okay
8) off = defrost process in progress or
"Heating mode"
on = defrost process is terminated or
"Cooling mode"
9) not used
10) not used
11) flashing during operation
12) flashing in the event of a malfunction
8.3 Heating Function
Set switch (1) to position On (I) to put heat pump
into operation. The heating mode can be preselected
by placing switch (3) to the Heating ( ) position.
The desired return temperature can be set using
selector dial (4), the relevant call for heat is
controlled by the potentiometer and lies within a
range of min. 10 °C and max. 55 °C. If the preset
temperature is reached, the heat pump switches off.
Once the return temperature drops below the preset
temperature by 4 Kelvin, the heat pump switches
back on. In the event that the preset return
temperature cannot be reached, the output for the
back-up heater cuts in after approx. 1 hour. The heat
pump cannot be restarted until a minimum time delay
of 5 minutes has elapsed. At a supply temperature
of approx. 60 °C or if the air temperature is too low,
the heat pump switches off.
8
FUNCTIONAL DESCRIPTION
CLEANING / CARE
8.4 Cooling Function
Place switch (1) in position On (I) to put heat pump
into operation. The cooling mode can be
preselected by placing switch (2) to the Cooling
(
) position. The desired return temperature can
be set using selector dial (4), the relevant call for
heat is controlled by the potentiometer and lies
within a range of min. 12 °C and max. 25 °C. When
the preset temperature is reached, the heat pump
switches off. Once the return temperature exceeds
the preset value by 4 Kelvin, the heat pump
switches back on. The heat pump cannot be
restarted until a minimum time delay of 5 minutes
has elapsed. At a supply temperature of below
7 °C, the heat pump switches off.
To prevent condensate from forming on the
system in the case of surface cooling systems, it
is recommended that dew point monitors be
installed at critical places of the cold distribution
system and connected in lieu of jumper A1. In the
event that condensation should form, the cooling
operation of the system will be interrupted.
8.5 Domestic Hot Water Function
This heat pump can also be used for heating domestic
water.
The call for domestic water heating (and the domestic
water temperature) is controlled by terminal "X2-7"
by means of a thermostat to be provided by the client.
This thermostat connects phase (L) to terminal "X27" and controls a reversing valve which is part of the
hot water switch group "N13".
A suitable thermostat is available as an accessory.
The call for domestic water heating may also occur if
no call for space heating exists. On a call for heat,
the control unit switches off the heating circulating
pump and the setpoint is set to maximum.
The water temperature is now controlled by the
external thermostat. After the domestic hot water
preparation has been terminated, the system
returns to the same function that was active before
the call.
CLEANING / CARE
9
9.1 Care
To protect the paint finish, avoid placing objects
against or on the unit. The external parts of the heat
pump can be wiped with a damp cloth and
commercially available cleaning agents.
CAUTION!
containing sand, soda, acid or chloride as these may
damage the surface.
To prevent malfunctions due to dirt deposits in the
plate heat exchanger of the heat pump, care must
be taken that the heat exchanger cannot become
contaminated in the heating installation. In the event
that operating malfunctions due to contamination
occur nevertheless, the system should be cleaned
as described below. (Caution: The fins of the finned
heat exchanger have sharp edges -> risk of cutting
injuries!)
9.2 Cleaning of Heating Side
The ingress of oxygen into the heating water may
result in the formation of oxidation products. An additional contamination of the heating water caused
by residues of lubricating and sealing agents occurs
in many cases.
Both of the above causes may lead to a reduction in
the performance of the plate heat exchanger of the
heat pumps. In such cases, the installer must clean
the heat exchanger concerned. 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 solution. In both cases the cleaning fluid
should be at room temperature. Thorough flushing
is necessary to ensure that all cleaning agent
residues are removed from the system. It is
recommended that the heat exchanger be cleaned
in the direction opposite to the normal flow direction.
Owing to their acid content, flushing agents must be
used with caution. To prevent acidic flushing agents
from entering the heating installation when cleaning
the condenser, we recommend that the flushing
device be mounted directly to the supply and return
line of the heat pump. The regulations of the trade
associations must be adhered to. If in doubt, contact
the manufacturers of the chemicals!
Do not use any cleaning agents
CAUTION!
is imperative that the water circuit be neutralized
after cleaning using appropriate agents.
To prevent consequential damage it
9
CLEANING / CARE
MALFUNCTIONS / TROUBLESHOOTING
DECOMMISSIONING
Caution - Heating Contractors
Depending on the 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 cause of this is the water
hardness as well as 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.
9.3 Cleaning of Air Side
Finned heat exchangers, fan and condensate drain
should be cleaned of debris (leaves, branches, etc.)
prior to the start of the heating season. Contamination
of this nature can be removed manually using
compressed air or by washing off with clear water.
The appliance cover and the air intake grille may have
to be removed for this purpose.
CAUTION!
ensured that all electrical circuits are disconnected
from the power supply.
When cleaning do not use any sharp or hard objects
so as to prevent any damage to the evaporator and
the condensate pan.
Extreme weather conditions (e.g. heavy snow) may
in some cases result in ice build-up on the inlet and
outlet grilles. To assure a minimum air flow rate, clear
the inlet and discharge areas of snow and ice, if
needed.
Prior to opening the unit it must be
The preset temperature level cannot be reached!
Please check whether
- the permissible operating conditions of the heat
pump are complied with (air temperatures too high
or too low).
- the air inlet or outlet areas are neither covered,
obstructed nor severely contaminated.
- valves or stop-cocks in the water lines (heating
lines) are closed.
- the water temperature in the buffer tank is
sufficiently high.
If you cannot eliminate the malfunction yourself,
please contact your customer service in charge (see
Warranty Certificate).
CAUTION!
only by an authorized and qualified customer service.
Work on the heat pump may be done
DECOMMISSIONING
11
11.1 End-of-Life Decommissioning /
Disposal
Before removing the heat pump, disconnect the
appliance from the power supply 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. In this context,
particular attention must be paid to the proper
disposal of refrigerants and refrigeration oils.
10
MALFUNCTIONS /
TROUBLESHOOTING
This heat pump is a quality product and is designed
for troublefree and maintenance-free operation. In
the event that a malfunction occurs nevertheless,
you will be able to correct the problem easily yourself
in the majority of cases.
Heat pump does not run!
Please check that:
- there is no problem with the power supply (blown
fuse, power failure).
- the power switch on the remote control is switched
on and the correct operating mode is selected, as
well as that the correct setpoint temperature is set.
10
12
APPENDIX
APPENDIX
12.1 DIMENSIONED DRAWING 12
12.2 EQUIPMENT DATA 13
12.3 SCHEMATICS
12.3.1 Heating mode LA 6MR 14
12.3.2 Cooling mode LA 6MR 15
12.3.3 Heating mode LA 8MR 16
12.3.4 Cooling mode LA 8MR 17
12.3.5 Heating mode LA 10MR 18
12.3.6 Cooling mode LA 10MR 19
12.3.7 Heating mode LA 12TR 20
12.3.8 Cooling mode LA 12TR 21
12.3.9 Heating mode LA 16TR 22
12.3.10 Cooling mode LA 16TR 23
12.4 WIRING DIAGRAMS
12.4.1 Control LA 6MR-LA 10MR 24
12.4.2 Load LA 6MR-LA 10MR 25
12.4.3 Terminal Diagram LA 6MR-LA 10MR 26
12.4.4 Legend LA 6MR-LA 10MR 27
12.4.5 Control LA 12TR-LA 16TR 28
12.4.6 Load LA 12TR-LA 16TR 29
12.4.7 Terminal Diagram LA 12TR-LA 16TR 30
12.4.8 Legend LA 12TR-LA 16TR 31
12.5 HYDRAULIC
BLOCK DIAGRAMS
12.5.1 Mono-energetic system 32
12.5.2 Mono-energetic system and
domestic hot water function 33
12.6 EC DECLARATION OF
CONFORMITY 34
11
Loading...