Technical documentation
Planning documentation
Installation instructions
Heat pumps
TERRA CL 08 - 33
Air - water - heat pump
Version 16.09.08
ib_TERRA CL
Page 2
Contents
General information 3
Description 4
Application range 4
Scope of delivery 4
Technical data 5
Design 6
Performance charts 7
Dimensions 9
Interior installation 10
Corner installation 11
Customer preparation 12
Accessories - corner installation 13
Assembly instructions - corner installation 14
Installation - Standard air duct 15
Option 1 16
Option 2 16
Accessories - Standard air duct 17
Customer preparation - Option 1 18
Customer preparation - Option 2 19
Assembly instructions - Standard duct 20
Installation - Flexible air hose 21
Customer preparation - Flexible air hose 22
Accessories - Flexible air hose 23
Assembly instructions - Flexible air hose 24
Conversion from right to left-side connection 25
Exterior installation 26
Customer preparation 26
Accessories - Exterior installation 27
Heating connections 28
Installation diagram 29
Control and regulation 33
Description of control functions 33
General 34
Connection diagram 35
Electrical connection 36
Power supply 36
Actuators - Pumps / valves 37
Sensor systems - sensors / inputs 38
Installing digital offset roomstat RS 40
Installing RFF room sensor 41
Commissioning information 41
Operation 42
Faults 43
Notes 44
Page 3
By purchasing this system you have acquired a modern
and efcient heating system. Ongoing quality controls
and improvements as well as functional checks at the
plant guarantee you technically perfect equipment.
Please read through this documentation carefully. It
contains important information for correct installation and
safe and economical operation of the system.
Safety instructions:
Installation and maintenance work can be hazardous due
to high system pressure, high temperatures and live parts
and may only be operated by specialist staff.
Heat pumps may only be installed by competent specialist staff and commissioned by a customer service company trained to do so by IDM-Energiesysteme GmbH.
When working on the heat pump, the system must be
de-activated and secured against re-activation. In addition, all safety instructions in the relevant documentation,
stickers on the heat pump itself and all other applicable
safety regulations must be observed.
Transport:
During transport, the heat pump must never be inclined
more than 30°. The heat pump must not be transported
on the connection ttings. The transport packaging may
only be removed if the heat pump is located at its installation location.
Sound emission:
TERRA heat pumps are very quiet in operation thanks to
their design. It is however important that the site of the
heater is situated as far as possible from noise-sensitive
living areas. A noise-insulating door should be tted door.
Construction drying and screed heating
The heat pump is not designed for the increased heat requirements when drying out construction work or heating
plaster or screed. This must be covered by equipment
provided by the customer if required.
Servicing and maintenance:
Regular maintenance as well as checking and servicing
of all system components guarantee its safe and economical operation in the long term. To achieve this, we
recommend a maintenance contract with the relevant
customer service company.
Cleaning:
If necessary, the TERRA heat pump can be cleaned with
a damp cloth. The use of cleaning agents is not recommended.
Installing additional components:
The installation of additional components which have not
been tested with the equipment may impair function. No
liability is accepted and the guarantee becomes void in
the event of damage caused for this reason.
Installation area:
- Ensure sufcient ventilation
(according to EN 378 T1-T4)
- No heavy dust formation
- No persistent air humidity
- Frost-proof
Symbols used and their meanings:
Various symbols can be found in these instructions. The
meaning of these symbols is given below.
General instructions for operation
of the heat pump.
Important information on installing and
operating the heat pump. This information
must be observed.
General instructions on installing the
heat pump.
Space for customer service
telephone number
The equipment conforms to the EU Directives:
Applicable EC Directives:
EC Machinery Directive (89/392/EEC)
EC Low Voltage Directive (73/23/EEC)
EC EMC Directive (89/366/EEC)
EC Pressure Equipment Directive
Applicable harmonised EN:
EN 378 EN 60529
EN 292/T1/T2 EN 294
EN 349 EN 60335-1/2-40
EN 55014 EN 55104
Applicable national standards/guidelines:
ÖNORM M 7755-2 (Austria)
DIN 8901 (Germany)
General information
Page 4
Description
The TERRA CL is an air source heat pump with suction
gas scroll compressor with large multi-row Al/Cu, nned
evaporator.
A special speed-controlled radial fan means that large
ow rates can be achieved at low speeds.
A plate heat exchanger is used as the condenser. The
machine frame consists of a steel-reinforced plastic prole. The cover panels are foam-insulated. This means that
the casing is completely protected from cold bridges and
has excellent sound insulation.
The heating controller is a modern controller that fulls all
the functions of standard heating regulation.
The heat pump has a compact design, the evaporator is
ready-tted in the top of the heat pump casing. The heat
pump is lled with refrigerant and is checked in the facto-
ry before shipping for reliable functioning.
Application range
For monovalent heating of single-family and two-family
homes under appropriate environmental conditions. The
building must be equipped with low-temperature heating
(e.g. underoor heating, wall heating, low-temperature
radiator heating).
The lower the maximum heating temperature
is set, the higher the efciency of the heat
pump.
TERRA CL heat pumps work using the R407C safety refrigerant which circulates in a closed circuit when correctly
mounted and commissioned. This minimises its environmental impact.
Scope of delivery
Heat pump unit with suction gas cooled •
scroll compressor
Stainless steel plate heat exchanger as condenser•
Finned tube Al/Cu evaporator package•
Speed-controlled radial fan•
Starting current limiter with rotary eld monitoring•
Refrigerant collector and dryer•
Thermostatic expansion valve•
Refrigerant inspection glass•
Refrigerant heat exchanger•
High pressure and low-pressure limiter •
Integrated switching valve for defrosting•
Switch cabinet with integrated regulation•
Defrost regulator•
Inlet air sensor•
Thermal relay to protect the compressor•
Thermally insulated basic frame•
Cladding, insulated against heat and noise•
Heating pump (TERRA CL 08-15 only)•
Electric heating immerser for any re-heating required •
(TERRA CL 08-15 only)
Flexible connection hoses•
Starting current limiter•
Other accessories:
see also the IDM pricing list
Page 5
Technical data
TERRA CL 08-33
as per EN 14511
Type Unit 8101215222733
Heat output for A2/W35 as per EN 255[kW]8,6 10,5 12,3 15,4 21,2 27,4 33,2
Heat output for A2/W35 [kW] 8,610,412,515,220,926,432,6
Heat output for A7/W35 [kW] 11,1 13,6 16,0 18,9 24,733,039,2
Heat output for A-7/W35[kW]7,3 8,810,412,216,822,828,0
Heat output for A2/W35 EN 255[kW]2,252,763,274,165,587,418,97
Power consumption for A2/W35 [kW] 2,44 2,97 3,57 4,47 5,97 7,76 9,59
Power consumption for A7/W35 [kW] 2,59 3,24 3,85 4,49 6,02 8,04 9,80
Power consumption for A-7/W35[kW]2,372,842,533,945,597,609,33
COP for A2/W35 as per EN 2553,8 3,83,8 3,73,8 3,73,7
COP for A2/W35 3,53,5 3,53,4 3,53,4 3,4
Weight [kg] 240255 290310 395450 480
Dimensions
HxWxD [cm] 153x110x75 153x110x75 163x120x78163x120x78173x120x88193x130x98193x130x98
Condenser
Radiator flow and return pipe R1" AG R1" AG R1" AG R1" AG R 1¼" AG R 1 ½" AG R 1 ½" AG
Max. flow temperature[°C]55555555555555
Max. operational pressure [bar] 3333333
Min. heating circuit water volume [l/h]1500 1800 2200 2650 4000 4850 5650
Pressure loss - heating side [kPa]10111517151718
installed or recommended
UPS 25-60UPS 25-60UPS 25-80 UPS 25-80 UPS 32-80 UPS 32-80TOP S 40/10
Tank-charging pump
installed or recommended [kW] 6666999
Electric heating immerser
Condensate run-offR1" AG R1" AG R1" AG R1" AG R1" AG R1" AG R1" AG
Fan type
Nominal air volume [m³/h] 3500 4000 4500 5500 7500 10000 12000
externally available compression [Pa]
Refrigerant
Filling quantity[kg]3,8 3,94,4 4,56,5 711,2
electrical connection [V]
max. power intake [A]12,214,212,614,517,5 22,527,5
Starting current [A]25,730,73034,841,55465
series connected main current fuse [A]C13 C16C16 C16C20 C25C35
series connected control current fuse [A]C10 C10C10 C10C10 C10C10
series connected electric heating immerser fu
s
[A]C10 C10C10 C10C13 C13C13
Acoustic power level[dB(A)] 61 62 64 65 66 68 69
Sound level in 5 m (internal) [dB(A)]43434546474950
Sound level in 10 m (internal)[dB(A)] 37 37 39 40 41 43 44
3x400V / 50Hz
copper-soldered stainless steel plate heat exchanger
Not included as standard
Not included as standard
radial / speed-controlled
can be freely adjustable using the speed of the fan
R407C
Page 6
Design
The dimensioning of an air/water heat pump should be
such that the bivalence point is between -3 and -10 °C.
This will help ensure that more than 90° of the annual
heating requirement is covered by the heat pump.
The maximum heating output of a building is determined
in the design, including its water consumption requirement.
In addition, the standard outside temperature is required.
This is determinated by geographical location and can be
obtained from various institutions.
Example:
Single-family house in Germany
4 persons
Service water consumption requirement:•
4 x 0.25 kW = 1 kW
Heating output required:•
16 kW
Standard outside temperature for Germany:•
- 16 °C
Off-period factor:•
1.1
Heating output required:
(service water consumption required + heating output required) x off-period factor = 18.7 kW
0
5
10
15
20
25
30
35
40
45
-20 -15 -10 -5 0 5 10 15 20
W35 EN14511
CL 33
CL 27
CL 22
CL 15
CL 12
CL 10
CL 8
{
{
outside temperature [°C]
heating capacity [kW]
bivalence point of the
particular heatpump
type
standard external temperature
electr. additional heating
at TERRA CL 15
service water required
electr. additional heating
at TERRA CL 22
building- characteristic line
required heating capacity at
standard external temperature
incl. service water required
Page 7
Performance charts
0
5
10
15
20
25
30
35
40
45
-20 -15 -10 -5 0 5 10 15 20
W35 EN14511
CL 33
CL 27
CL 22
CL 15
CL 12
CL 10
CL 8
outside temperature [°C]
heating capacity [kW]
0
5
10
15
20
25
30
35
40
45
-20 -15 -10 -5 0 5 10 15 20
W45 EN14511
CL 33
CL 27
CL 22
CL 15
CL 12
CL 10
CL 8
outside temperature [°C]
heating capacity [kW]
Page 8
0
5
10
15
20
25
30
35
40
45
-20 -15 -10 -5 0 5 10 15 20
W55 EN14511
CL 33
CL 27
CL 22
CL 15
CL 12
CL 10
CL 8
outside temperature [°C]
heating capacity [kW]
Page 9
Dimensions
Heating supply (exible connection hose)1
Can be used for sensors and control lines2
Can be used for sensors and control lines3
Heating return (exible connection hose)4
Condensation run-off5
d
f
b
h
a
l
k
j
i
g
a d
e
t
m
1
2
3
4
5
Type b h t a d e f g i j k l m
8 1100 1535 750 640
865 690 1035 575 460 350 240 125 125
10 1100 1535 750 640
865 690 1035 575 460 350 240 125 125
12 1200 1635 780 640
965 720 1135 575 460 350 240 125 125
15 1200 1635 780 640
965 720 1135 575 460 350 240 125 125
22 1200 1735 880 740 965 820 1135 675 540 400 260 125 125
27 1300 1935 980 740 1165 920 1235 675 540 400 260 125 125
33 1300 1935 980 740 1165 920 1235 675 540 400 260 125 125
TERRA CL 08-33
All dimensions in mm
Page 10
Interior installation
Installation instructions:
Interior installation of the heat pump is recommended.
This means that the work involved in frost protection
and condensation run-off heating can be avoided. It also
means that the inlet air / outlet air can be conveyed to the
heat pump with the least possible heat losses. Various
installation options are described in detail in the following
chapters.
All components of the heat pump are insulated so that no
condensation is formed on the external parts even at outlet air temperatures of -20°C. However, it is still advisable
to air the room regularly.
The heat pump is decoupled via vibration dampers. The
installation location should consist of a solid base.
Heating connection:
A exible hose set is included as standard for heating
connections. See technical data for appropriate connec-
tion sizes for specic machines. It is advisable to use air
source heat pumps only in combination with a buffer tank
such as the IDM Hygienik Tank.
Condensation run-off:
Air source heat pumps generate condensation during
operation. With larger machines, up to 50l of water can
be extracted from the ambient air per day. The condensation run-off should be conveyed into the waste water
channel via a siphon using the appropriate pipe diameter
for the machine.
Air routeing:
The various air ducts (see accessories for interior ins-
tallation) and wall openings are designed specically for
the relevant machines in question. Efcient and fault-free
operation can only be ensured if the appropriately sized
connection elements are used.
Even light shafts which are too small
enlarge the pressure loss of the air
routeing. These must therefore be of a
sufcient size.
Light shafts must have a rainwater run-off.
Air inlet / air outlet:
The options for how the air inlet and air outlet are designed are varied.
The list below provides design guidelines:
Air inlet side and air outlet side should always be on •
two different sides of the building.
Openings in the masonry must always be protected •
against the penetration of foreign bodies (leaves, small
animals). To do this, mesh grilles should be tted in
light shafts and weather-shield grilles should be installed on visible walls.
Wall openings must be created as per the specica-•
tions and insulated against damp penetration using a
closed-pore insulating material (minimum thickness
50mm).
Noise
Noise level in the installation room depends on various
factors such as room size, absorption capacity, reection,
free noise propagation, etc. For this reason, it is important
that the heat pump is situated as far as possible from
noise-sensitive areas. A noise-insulating door should be
tted.
The night-time reduction in the fan speed means that noise can be reduced by up to 4 dB. Noise level on the inlet
and exhaust air openings are also reduced by approx. 4
dB when using air shafts or ducts.
In case of exterior installation, the installation of the heat
pump in a corner can lead to a higher noise level. Superposition of the sound waves means that noise level can
increase up to 3 dB.
Page 11
Corner installation
A condensation run-off with siphon must
normally be tted opposite the exhaust
opening for the heat pump.
The ideal position for the heat pump has proved to be in a
corner. Wall openings can be prepared by the customer in
advance. These openings must be insulated with closed
pore insulating material (minimum thickness 50mm).
Space required, accessibility:
To guarantee maintenance and operation of the heat
pump, the following minimum distances must be observed:
Front side (operation and maintenance side) = 800mm
Maintenance side = 500mm
Observing these distances will help ensure problem-free
system maintenance and operation.
min. 500mm
1
1
Heating connection /
Condensation run-off
Page 12
Exhaust air opening to right Exhaust air opening to left
Based on accessibility, the exhaust air
opening should ideally be on the right-
hand side.
An even, solid installation surface must be selected.
After positioning the heat pump, it must then be made
level. There are adjustable feet on the heat pump for this
purpose.
Customer preparation
Specied dimensions include clearances. A noise-insulating door should be tted. Minimum
thickness of the wall insulation is 50mm.
a
b
d
c
e
e
f
g
a
b
d
c
e
e
f
g
Type abcdefg
81000 830 650 830 90 650 650
10 1000 830 650 830 90 650 650
12 1100 930 680 930 90 650 650
15 1100 930 680 930 90 650 650
22 1100 930 780 930 90 650 650
27 1200 1130 880 1130 90 750 750
33 1200 1130 880 1130 90 750 750
TERRA CL 08-33
All dimensions in mm
Corner installation
Page 13
Accessories - corner installation
Pos. 341
Pos. 342 (343)
Pos. 345 (346)
Pos. 344
Type 810 12 15 22 27 33
Pos. Accessories Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no.
341 Wall connection air inlet
for tight connection
344 Wall connection air outlet 192 364
for tight connection
Pos. Optional accessories Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no.
342 Weather-protected inlet grille
Steel, galvanised
343 Wire inlet grille
Steel, galvanised
345 Weather-protected outlet grille 192 365
Steel, galvanised
346 Wire outlet grille 192 366
Steel, galvanised
192 376192 346 192 356
192 375
192 342 192 352 192 372
TERRA CL 08-33
Corner installation
192 341 192 351 192 371
192 343 192 353 192 373
192 344 192 354 192 374
192 345 192 355
Page 14
Assembly instructions - Corner installation
Wall connection is supplied separately. Vertical connec-
tions must be afxed rst. To do this, simply remove the
lm on the rear. The cellular rubber can then be afxed
ush with the external edge of the heat pump.
Additionaly the horizontal elements are also lined on the
front. This will help ensure an optimum seal.
Before the machine is positioned in the corner, a check
should be carried out to ensure that the wall opening
prepared by the customer has been insulated.
The machine can then be moved into the corner.
The heat pump may only be moved with
the panels tted.
If there are any air gaps on the outlet or inlet openings
due to the ground being uneven, this can be corrected
using the adjustable machine feet.
Noise
Noise level in the installation room depends on various
factors such as room size, absorption capacity, reection,
free noise propagation, etc. For this reason, it is important
that the heat pump is situated as far as possible from
noise-sensitive areas. A noise-insulating door should be
tted.
Signicant pressure against the wall
should be avoided.
Page 15
Installation – Standard air duct
If there are no two external walls directly available for
installation, the air ow can be conveyed outwards via
insulated air ducts. Our range includes standard air ducts
which can be connected directly to the heat pump without
adaptation.
There are two ways to do this:
Option 1:
This method is used if there are no two external walls
available. As a short circuit may occur between the supply and exhaust sides with this method, the inlet and outlet should be positioned as far apart as possible. The unit
can be separated from any shrubbery by tting dividing
walls if necessary.
Option 2:
This method is equivalent to corner installation. This
method can be used if corner installation is not possible
due to space restrictions or if a gap needs to be bridged
between the heat pump and outlet side.
Air ducts can be connected to the right
and left of the heat pump. Heating and
electrical connections can also be tted
on both sides.
Page 16
Pos. 341
Pos. 342 (343)
Pos. 421 Pos. 423
(424)
Pos. 425 Pos. 426
Pos. 427 (428)
Option 1
Pos. 341
Pos. 342 (343)
Pos. 421 Pos. 423
(424)
Pos. 426
Pos. 427 (428)
Option 2
Page 17
Accessories – Standard air duct
Air ducts are supplied with
mounting materials (screws, washers,
nuts).
Type 8101215222733
Pos. AccessoriesProd. no. Prod. no.Prod. no.Prod. no. Prod. no. Prod. no.Prod. no.
341 Wall connection air inlet
for tight connection
421Outlet panels right/left -
foamed -
423Duct (1000mm) -
insulated - can be cut to length on request -
424Duct (1500mm) -
insulated - can be cut to length on request -
425Bow 90° -
insulated -
426Wall connection -
insulated -
Pos. Optional accessoriesProd. no. Prod. no.Prod. no.Prod. no. Prod. no. Prod. no.Prod. no.
342Weather-protected inlet grille
Steel, galvanised
343Wire inlet grille
Steel, galvanised
427Weather-protected outlet grille-
Steel, galvanised -
428Wire outlet grille -
Steel, galvanised -
388Side panels 192 408
for free cut-out 84
-
-
-
192 351
37
-
-
-
-
192 371
-
192 353
225
192 372
550
192 373
260
192 352
222
192 428
45
Standard duct
-
-
192 341
TERRA CL 08-33
484
192 421 192 431
-
-
-
-
192 424
192 342
121
264
192 425
294
192 426
192 418
9965 73
192 388 192 398
34
120
178
129
192 423
199
118
192 427
192 343
398
Page 18
Customer preparation – Option 1
Specied dimensions include clearances. Wall opening should be thicker around the wall
insulation. Minimum thickness of the wall insulation is 50mm.
a
b
c
d
e
f
g
Type a b c d e fg**
81000 830 500 700 650 720 1100
10 1000 830 500 700 650 720 1100
12 1100 930 500 700 650 770 1100
15 1100 930 500 700 650 770 1100
TERRA CL 08-15
All dimensions in mm
Standard duct - Version 1 (90°)
** for 1000mm duct length / length can be cut to size as required
Page 19
Customer preparation – Option 2
Specied dimensions include clearances. Wall opening should be thicker around the wall
insulation. Minimum thickness of the wall insulation is 50mm.
a
b
c
d
e
f
g
h
Type abcdefg**h
81000 830 500 700 650 720 1100 270
10 1000 830 500 700 650 720 1100 270
12 1100 930 500 700 650 770 1100 270
15 1100 930 500 700 650 770 1100 270
TERRA CL 08-15
All dimensions in mm
Standard duct - Version 2 (180°)
** for 1000mm duct length / length can be cut to size as required
Page 20
Assembly instructions - Standard duct
Air inlet side:
The inlet-side wall connection is supplied separately. Ver-
tical connections must be afxed rst. To do this, simply
remove the lm on the rear side. The cellular rubber can
then be afxed ush with the external edge of the heat
pump.
Additionaly the horizontal elements are also lined on the
front. This will help ensure an optimum seal.
Before the machine is positioned on the inlet opening,
check that the wall opening prepared by the customer
has been insulated.
The heat pump may only be moved with
the panels tted.
If there are any air gaps on the outlet or inlet openings
due to the ground being uneven, this can be corrected
using the adjustable machine feet.
Signicant pressure against the wall
should be avoided.
Outlet panels:
The outlet panel is mounted using the four clamps supplied.
Duct:
Assemble the duct using the screw set supplied. The
tting length should then be checked.
If the straight duct is too long, two rivets can be bored
open on one side so that the ange can be removed. The
duct can then be cut to length using an angle grinder or
a jigsaw with the relevant blade. The ange can then be
re-tted.
Insulation:
The insulation for the straight duct is supplied separately.
This is self-adhesive and needs to be afxed once the
duct has been cut to the correct length.
Wall connection:
The wall connection is sprayed into the wall opening with
assembly foam. The outlet duct must be connected before the foam hardens.
If two or more ducts are assembled
together, the duct must be supported
(above or below).
Page 21
Installation – Flexible air hose
This option is suitable for connecting to air openings at
varied hights. The air hose is supplied in three different
lengths and can be cut to length as required.
Page 22
Customer preparation – Flexible air hose
a
b
c
d
e
f
Specied dimensions include clearances. Wall opening should be thicker around the wall
insulation. Minimum thickness of the wall insulation is 50mm.
Type abcdef
81000 830 620 620 650
> 1000
10 1000 830 620 620 650
> 1000
12 1100 930 720 720 650
> 1000
15 1100 930 720 720 650
> 1000
All dimensions in mm
Flexible hose - page
TERRA CL 08-15
Page 23
Pos. 341
Pos. 342 (343)
Pos. 381 Pos. 387 Pos. 3861
(3862)
(3863)
Pos. 387 Pos. 383 Pos. 384
(385)
Accessories – Flexible air hose
Type 810 12 15
Pos. Accessories Prod. no. Prod. no. Prod. no. Prod. no.
341 Wall connection air inlet
for tight connection
381 Outlet panels right/left
foamed
3861 Insulated air hose
5m - can be cut to length
3862 Insulated air hose
3m - can be cut to length
3863 Insulated air hose
2m - can be cut to length
383 Wall flange
insulated
387 Hose clip
Pos. Optional accessories Prod. no. Prod. no. Prod. no. Prod. no.
342 Weather-protected inlet grille
Steel, galvanised
343 Wire inlet grille
Steel, galvanised
384 Weather-protected outlet grille
Steel, galvanised
385 Wire outlet grille
Steel, galvanised
382 Outlet panel on top
foamed
388 Panels right/left
required when outlet is on top
192 382 192 392
192 388 192 398
192 385 192 395
192 343 192 353
192 384 192 394
192 342 192 352
192 387 192 397
192 386 3 192 396 3
192 383 192 393
192 341 192 351
TERRA CL 08-33
192 381 192 391
Flexible air hose
192 386 2 192 396 2
192 386 1 192 396 1
Page 24
Assembly instructions – Flexible air hose
Air inlet side:
The inlet-side wall connection is supplied separately. Ver-
tical connections must be afxed rst. To do this, simply
remove the lm on the rear. The cellular rubber can then
be afxed ush with the external edge of the heat pump.
Additionaly the horizontal elements are also lined on the
front. This will help ensure an optimum seal.
Before the machine is positioned on the inlet opening,
check that the wall opening prepared by the customer
has been insulated.
The heat pump may only be moved with
the panels tted.
If there are any air gaps on the outlet or inlet openings
due to the ground being uneven, this can be corrected
using the adjustable machine feet.
Signicant pressure against the wall
should be avoided.
Outlet panels:
The outlet panel is mounted using the four clamps supplied.
Wall ange:
The wall ange must be tted to the air outlet opening
using suitable mounting materials. There are four bore
holes at the corners of the ange for this purpose.
Hose:
The hose can be cut to any size required. For connecting
the two anges, the hose insulation is pushed together at
both ends.
The hose is tted onto the ange using a hose clamp.
The insulation can then be pushed back onto the ange.
The air hose should be supported by a
bracket every 0.5m.
Page 25
Conversion from right to left-side connection
The TERRA CL is pre-tted with right-hand side connection openings. The connection side can be changed if
required, however. The following steps are required to do
this:
Remove the panels on the right-hand side by unfastening
the eight screws.
Remove the central bar by unscrewing the two clamping
screws above and below.
Then remove the assembly angle above and below of the
proles.
Converting the hydraulic pipework
1
3
2
4
The following steps need to be carried out to convert the
hydraulics:
Remove the right-hand side pipework and unfasten the
cable ttings.
Unfasten the connection angle with the crown nuts on
the plate heat exchanger. Turn the lower elbow joint by
180° and screw back on. Screw on the xing clips and
threaded rods. Install the circulation pump and turn the
pump head back. Then screw on the pipe socket with
the pump beater and t the xing clip. With an electric
heating immerser, remove the brass extension piece so
that the connections are ush on the outside. Re-fasten
all connecting cables using the cable binder.
Then re-t the panels onto the right-hand side.
Page 26
Exterior installation
Customer preparation
Foundation:
The foundation should be level and stable. A base can
be provided by the customer or a paving slab can be laid
on a gravel base. The heat pump should be positioned
slightly higher than the immediate site prole.
Space requirements:
The heat pump must be positioned so that there is sufcient space for air intake and air outlet (see minimum distances for exterior installation). It should not be possible
for the inlet and exhaust air openings to become blocked
by snow, leaves, etc.
Installation in wall niches is to be avoided.
Inlet air:
The inlet air must be free of impurities such as sand and
caustic materials such as ammonia, sulphur, chlorine, etc.
Condensation pipe:
The condensation pipe must be laid so that the water can
also ow off even at outside temperatures below 0°C. A
siphon should be tted.
Heating connections:
In general, all lines outdoors should be kept as short as
possible. All pipes and wall openings must be professionally heat-insulated and frost-protected during installation.
A self-regulating companion heating system can be installed if required.
Installation location:
Despite the reduction in speed during the night, the heat
pump should not be positioned adjacent to a living room
or bedroom.
The relevant installation guidelines conforming to EN 378,
for example, must be observed.
1 2
3
4
min. 1 m
min. 2 m
min. 2 m
min. 0,8 m
C
D
E
B
A
alternativ
connection heating side
condensation run off
Type TERRA CL A B C D E
08-10 750 1100
190 150 125
12-15 780 1200
22 880 1200
27-33 980 1300
Page 27
Accessories – Exterior installation
Pos. 301
Pos. 302
Pos. 303
Pos. 306
Type 810 12 15 22 27 33
Pos. Accessories Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no.
Set for external installation 192 320
comprising
301 Roof 192 321
coated
302 Weather-protected inlet grille
Anodised aluminium
303 Weather-protected outlet grille 192 323
Anodised aluminium
Crankcase heater
Pos. Optional accessories Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no. Prod. no.
305 Lockable door
306 Insulated cover 192 306 192 326
TERRA CL 08-33
Set for external installation
192 330192 300 192 310
192 301 192 311
192 302
192 331
192 312 192 332
192 303 192 313 192 333
192 305
192 304 192 324
Page 28
Heating connections
The relevant laws, regulations and standards for machine room piping and for heat pump systems must also be
observed.
It is essential that a dirt trap is tted in the heating •
return pipe.
Safety devices and expansion devices for closed hea-•
ting systems according to EN 12828 must be tted.
Pipe dimensions must conform to the required ow •
volumes (see section 2.5, Technical data, page 5).
Connection hoses supplied for the heat pump intake •
and return lines must always be installed. The connection hoses can be cut to the required length, but not
shorter than 60 cm. In addition, the connection hoses
must not be bent.
Venting options should be tted at the highest points of •
the connection lines, and draining options at the lowest
points.
To avoid heat loss connection lines should be insulated •
using suitable material.
Oxygen diffusion
With plastic pipe underoor heating or open heating systems which are not diffusion-tight, corrosion may occur
on steel parts when using steel pipes, steel radiators or
storage tanks due to oxygen diffusion.
Corrosion products can be deposited in the condenser
and may cause heating losses to the heat pump or highpressure faults.
For this reason, open heating systems or steel pipe
installations in combination with plastic pipe underoor
heating which is not diffusion-tight should be avoided.
Heating water quality
Depending on the quality of the heating water, limescale
may occur (adherent coating primarily consisting of calcium carbonate) on heat exchanger surfaces in particular,
i.e. with a high proportion of calcium hydrogen carbonate
there is a risk of limescale forming.
For this reason in systems with a water hardness of over
14°dH or with a calcium hydrogen carbonate concentration of more than 2.5 mol/m³, the heating water should be
treated accordingly (softened/demineralised).
Information on the calcium hydrogen carbonate concentration c(Ca(HCO3)2) of your heating water can be
obtained from your water supply company.
The pH value should also be checked; this should be
between 8 and 9.5.
EN 12828
ÖNORM H 5195
VDT Directive no. 2034-1
Incorrect ow volumes due to incorrect
pipework, incorrect ttings or incorrect
pump operation may cause damage.
Page 29
Installation diagram
2.8-0-1-0-2-0
TERRA CL air source heat pump with Hygienik
and layer separate plate
The electric heating immerser is activated when
the system fails to reach an adjustable outside temperature (bivalence point)•
there is a high pressure or low pressure fault or•
there is a thermal relay fault.•
Page 30
2.8-0-2-5-2-0
TERRA CL air source heat pump with Hygienik
without layer separate plate and heating buffer
For larger systems (over approx. 27kW), with either
signicant hot water consumption or very low hot water
consumption, it is advisable to separate the buffer tank
and the Hygienik. The tank in question is heated via the
priority valve as required. For hot water supply, a storage
tank without layer separate plate is used.
An electric heating immerser and a
heating circulation pump are installed in
model sizes to TERRA CL15. Available as
an accessory for larger heat pumps.
Page 31
2.8-5-1-0-2-0
TERRA CL air source heat pump with Hygienik
layer separate plate and solar panel connection
The solar plant is activated via the heating regulation
system in the TERRA CL. The freely programmable
output 2 (terminal X3-66) needs to be programmed for
this function. In addition, the collector tank sensor (termi-
nal X4-90) and the collector ow sensor (terminal X4-91)
should be connected. Depending on the size, a solar
panel of max. 12m² can be connected to the solar coil in
the Hygienik tank.
For larger collector surfaces, an external pipework
module with plate heat exchanger and appropriate solar
controller must be used.
Page 32
2.8-3-1-0-2-0
TERRA CL air source heat pump, oil/gas boiler,
Hygienik, layer separate plate and heating buffer
Connecting the oil boiler to the electric heating immerser output:
Dependent on output when an adjustable outside temperature value is not reached and in the event of a high
pressure, low pressure fault or thermal relay fault
Page 33
Description of control function
Modular heating circuit controller with integrated
control functions for
- Two mixer circuits
- One heating circuit without mixer
- Hot water loading circuit
- Solar controller
• User-friendly and intelligent user interface
• Integrated quick user guide
• Large LCD display for displaying actual values,
parameters, error messages and operating status conditions
• Plain text display (D,F,I,GB) and background lighting
• 7 large function keys for
- Daytime room temperature
- Night time room temperature
- Hot water temperature
- Operating mode selection (holiday, periods of
absence, extended heating operation, automatic, summer, heating operation permanently
reduced, frost protection)
- Heating curve adjustment
- System information
- Emissions measurement and manual operation
• Lock-down button for simple setting of the desired temperatures and fuctions.
• Plug-in connecting terminals
• Accessories
- Head generator sensor
- External sensor
- Flow sensor
- Water heating sensor
- Wall housing
Functions:
• Weather-dependant feed temperature control with or wi-
thout room inuences, taking into account the building
characteristics and turn-on optimisation
• Hot water loading circuit
- with different operating modes (e.g. hot water
priority or parallel operation)
- Economy temperature
- Adjustable legionella protection function
- Adjustable storage pump run-on
- Storage tank discharge protection
- Limitation and safety functions
• Optimum adjustment of the control characteristics for
different heat generators
• Heating characteristics adaptation
• Digital time switch with
- one time switch channel per heating circuit and
hot water loading circuit.
- 3 individual, preset standard programs for all
time switch channels and up to three switching
cycles per day and per time switch channel
- Switching on/off times can be changed
- Automatic summer/winter time conversion,
- Several years worth of power reserve
• Pump anti-block protection
• Frost protection
• Operating hour and pulse counters
• Function-dependant relay test
• Screed drying function for underoor heating
• Monitoring option for exhaust gas temperature
• Self-test with error diagnostics and error memory
• Variable inputs and outputs
• Control software can be updated (UpDate)
• Query contact or modem-switching function
Regulation
For exterior installation in
particular we recommend a
digital room station on which
the parameters can be set
and changed.
Page 34
General
Electrical connection must be registered with the relevant
power supply company.
The necessary series-connected fuse for the primary
circuit can be found in the technical data on page 3. It is
essential that a “slow-blow” design is used (“C” characteristic). The relevant cable cross section must be determined by the electrician.
A thermal relay is pre-installed to protect the compressor.
Depending on system design, the relevant sensors are
required; see the following pages for more information.
For reliable operation of the heat pump, the voltage in the
mains network must be within specic tolerance limits,
between 360 and 430 V (check with the relevant power
supply company if necessary).
The TERRA CL is tted with a starting current limiter as
standard, which reduces the starting currents by up to
50%.
Some information on the EMC issue:
Electro-magnetic compatibility demands additional work
and expertise from all manufacturers and operators of
modern electrical technology and electronics year on
year.
As the number of electronic devices in use increases continually, the number of potential sources of interference
also increases. A combination of cables from the power
supply company, transmission stations and other communications devices generates an invisible “electrosmog”.
This interference affects all systems, both biological (us
as living beings) as well as technical electrical systems.
They generate undesirable fault currents which can have
different effects.
The effects on biological systems can only be guessed at
currently, but the effects on technical electrical systems
are measurable, and in the worst case, visible as well.
The faults can have different effects:
Short-term measurement faults•
Permanent measurement faults•
Short-term interruption in data connections•
Permanent interruption in data connections•
Data losses•
Damage to equipment•
Potential sources of interference are essentially all
technical electrical systems, e.g. contactor coils, electric
motors, transmitters, mains and high-voltage lines, etc.,
and the equipment can be affected via different coupling
routes (galvanic, inductive, capacitive, via radiation).
For our part, we have undertaken everything possible to
make the Multitalent Control interference-proof (hardware
design, EMC-proof electrical panel, mains lter, etc.).
It is the responsibility of the electrician in particular
to avoid any possible coupling routes when setting
up the electrical installation.
primary power supply
3x400V / 50Hz
electric heating immenser
3x400V / 50Hz
control current
230V / 50Hz
Page 35
Connection diagram
All sensors and actuators are connected on series terminals in the electrical cabinet. The cables can be inserted
into the heat pump on the right and left.
The loading pump and an electric heating immerser are
included as standard with the TERRA CL 08-15 only. In
TERRA CL 22-33 heat pump, the IDM loading pump range or a suitable loading pump should be used. An additional electric heating immerser can be installed on the heat
pump inlet in a pipe casing.
Page 36
Electrical connection
Before connection, the electrics cabinet must be opened. To do this, loosen the grip plate (see diagram). The
connecting terminals will then be freely accessible. The
connecting terminals for the mains and primary power
supply connections are separate (see diagram or following pages).
Mains supply: 230V/ 50 Hz
Primary power supply connection: 3x400V / 50 Hz
Electric heating immenser connection: 3x400V / 50 Hz
The supply lines must have the relevant thickness. For
more information, see technical data point on page 5.
Connecting terminals:
Single: primary power supply terminals and connection
for electric heating immenser 400V/ 50 Hz
3-layer: control current and output terminals 230 V/ 50
Hz
2-layer: sensor terminals (low voltage)
Before working on the electronics, the
machine must be disconnected from the
mains.
Given below are the connections to be provided by the
customer, on series terminals, shown in black.
The sizes of the cable cross sections for the primary electrical connection and electric heating immerser should be
selected in accordance with the technical data (page 5).
Primary power supply
System earthing:
When the protective conductor is connected correctly, the
electrical panel and the heat pump casing are earthed.
With interior installation, an emergency
stop switch for the heating system must be
tted on the heat pump's exterior.
The connecting terminals for the power supply are designed as single-layered terminals.
1
L1
X1
2L23
L35PE
4
N
6L17L28L39PE10L111L212L313N14
PE
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
3x400V / 50Hz
primary current
compressor
radial fan
TERRA CL 5-33 (400V) connection for heat pump
TERRA CL 05-15 (400V) connection for electric heating immerser
1
L1
X1
2L23
L35PE
4
N
6L17L28L39PE10L111L212L313N14
PE
15L116L217L318N19
PE
20L121L222L323N24
PE
X11X2
2 3 4 5 6
PE
N
L
N
L
E1
3x400V / 50Hz
primary current
compressor
radial fan
3x400V / 50Hz
primary current
heating immenser
3x400V / 50Hz
electric
heating immenser
In TERRA CL models 22-33kW, another bivalent heat generator (e.g. electric heating immerser) can be actuated
via terminal X2-3 - see next page.
Version for single-phase primary power supply
TERRA CL 05-15 (230V) connection for heat pump
1
L1
X1
2L23
L35PE
4
N
6L17L28L39PE10L111L212L313N14
PE
15L116L217L318N19
PE
20L121L222L323N24
PE
X1
1
L
X1
3PE2
N
4L6N7PE8L9N10PE14L115L15L11L12N13PE16L117N18
PE
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
230V / 50Hz
control current
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
1x230V / 50Hz
primary current
compressor
radial
fan
primary current
heating immenser
connection
heating immenser
3x400V / 50Hz
primary current
compressor
radial fan
3x400V / 50Hz
primary current
heating immenser
3x400V / 50Hz
electric
heating immenser
12L313N14PE14L115L111L12N13PE16L117N18
PE
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
230V / 50Hz
control current
electric heating
immenser
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
primary current
heating immenser
connection
heating immenser
TERRA CL 05-15 (230V) connection for electric heating immerser
The electric heating immerser can also be installed in the
400V version, but is only supplied with 230V.
The system must only be connected to
the mains and put into operation if the
entire heating system has been lled or
the circulating pumps may run dry.
Page 37
In TERRA CL models 22-33kW, a contactor for an electric
heating immerser can be controlled by the heat pump
supply via terminal 3. The heating immerser then activates either automatic / manual or off via the switch S2
(black). The buffer loading pump runs in parallel with the
electric heating immerser even if the compressor is not
running.
L
N
PE
Actuators – Pumps / valves
Actuators are connected to 3-layer series terminals. The-
se are generally congured as follows:
Mixer connection:
(applies to NEHS mixers).
Mixer open = brown
Mixer closed = black
Maximum restriction for underoor heating:
With underoor heating circuits, an additional clip-on
thermostat must be tted and the relevant heating circuit
pump supply switched via it in series.
If speed-controlled
pumps are being
used (such as
Grundfos Alpha), they
must be switched via a contactor
on all poles, in other words
phase conductor and neutral
conductor (see diagram and
Grundfos manual).
An auxiliary relay must be integrated
for the electrical connection of a priority valve with actuation on both sides.
The connection should be made on
the right according to the connection
diagram or installation instructions with
a three-way switching valve.
The neutral conductor and earthing
should also be laid on the three-layer
terminals.
1
L1
X1
2L23
L35PE
4
N
6L17L28L39PE10L111L212L313N14
PE
15L116L217L318N19
PE
20L121L222L323N24
PE
X1
1
L
X1
3PE2
N
4L6N7PE8L9N10PE14L115
L1
5
L
11L12N13
PE
16L117N18
PE
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
PE
N
L
N
L
L
N
L
N
X3
55
56
57
58
59
60
61 62
63 64 65
66
relais
for speed control-
led pumps
boiler loading pump/
priority valve
pump for heating
circle without mixer
buffer loading pump
mixer HC1 open
brown
mixer HC1 close
black
pump HC1
mixer HC2 open
brown
mixer HC2 close
black
pump HC2
control
2. heating generator
230V / 50Hz
control current
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
1x230V / 50Hz
primary current
compressor
radial
fan
primary current
heating immenser
connection
heating immenser
3x400V / 50Hz
primary current
compressor
radial fan
3x400V / 50Hz
primary current
heating immenser
3x400V / 50Hz
electric
heating immenser
PE
N
L
N
L
PE
N
L
N
L
L
N
L
N
relais
for speed control-
led pumps
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
PE
N
L
N
L
PE
N
L
N
L
L
NLN
55 56
N
L
N
close
open
relais
for speed control-
led pumps
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
230V / 50Hz
control current
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
Before commissioning the system, check
that the pumps are correctly in position.
Before commissioning the system, tighten
the terminals.
Control current power supply
Page 38
L
N
PE
L ... Sensor / Bus +
L ... GND / Sensor / Bus -
Sensor systems – Sensors / Inputs
Sensor systems are connected to two-layer series termi-
nals. These are generally congured as follows:
The ow temperature sensors for the heating circuits
used are required in every case. They are tted onto the
relevant ow pipes.
If necessary, the sensors can be extended using a shielded cable. In this case,
the shielding in the electrical panel must
be earthed and it must be ensured that
the connection is clean and corrosion-free
(ideally soldered).
Sensor lines should be run separately
form mains cables (see EMC issue
page 34).
Sensor lines have a cable cross section of 0.75mm² as
standard.
The sensor positions are shown in the relevant installation diagram. The reliable functioning of the system can
only be ensured by correct positioning and a good heat
transfer (heat conducting paste).
For connecting the offset roomstat or remote control,
please see the instructions on the following pages.
1
L1
X1
2L23
L35PE
4
N
6L17L28L39PE10L111L212L313N14
PE
15L116L217L318N19
PE
20L121L222L323N24
PE
X1
1
L
X1
3PE2
N
4L6N7PE8L9N10PE14L115
L1
5
L
11L12N13
PE
16L117N18
PE
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
PE
N
L
N
L
L
N
L
N
55 56
N
L
N
X3
55
56
57
58
59
60
61 62
63 64 65
66
X4
81 82
83 84 85 86 87 88 89
90 91
close
open
room station/ remote
control RSS-T / RFF-T
AF external sensor
RLF, PF, WF
return- / buffer-
or heating generator
SF service water sensor
(buffer sensor)
VF1 flow sensor HC1
VE1 varible input 1
KVLF solar kollector
sensor
VF2 flow sensor HV2
VE2 varible input 2
VE3 varible input 3
KSPF solar buffer sensor
relais
for speed control-
led pumps
boiler loading pump/
priority valve
pump for heating
circle without mixer
buffer loading pump
mixer HC1 open
brown
mixer HC1 close
black
pump HC1
mixer HC2 open
brown
mixer HC2 close
black
pump HC2
phase 230V/ 50Hz
230V / 50Hz
control current
electric heating
immenser
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
1x230V / 50Hz
primary current
compressor
radial
fan
primary current
heating immenser
connection
heating immenser
3x400V / 50Hz
primary current
compressor
radial fan
3x400V / 50Hz
primary current
heating immenser
3x400V / 50Hz
electric
heating immenser
Page 39
Input terminals X4
X4-81 Offset roomstat / remote control
X4-82 External sensor
X4-83 Return / buffer or heat generators
For cascade systems, the sensor must be
positioned in the lower area of the buffer storage
tank.
X4-84 Hot water sensor (tank / boiler sensor)
Positioned in the top area of the Hygienik and
layer separate plate. With separate storage tanks
(separate buffer tank and Hygienik without layer
separate plate), this sensor must be positioned in
the lower area of the Hygienik.
X4-85 Heating circuit one ow sensor
X4-86 Variable input VA1
(Assignment may vary depending on setting)
X4-87 and 88 variable inputs, see X4-86
X4-89 Heating circuit two ow sensor
X4-90 Collector sensor
X4-91 Solar sensor (storage tank reference tempe-
rature) This sensor must be positioned at the
bottom in the buffer tank.
Grey connections have already been conducted. All other
connections must be conducted as required.
Input terminals X5
X5-1 Air inlet sensor
X5-2 Defrost sensor
X5-3 Condensation sensor
X5-4 ND limiter
X5-5 HD limiter
X5-6 Starting current limiter
X5-7 Fan error message
X5-8 power supply company block
A break contact can be used by the control system to detect a block from the local power supply
company. The heat pump is then blocked for this
period.
If no contact is available via a ripple control signal converter, a relay must be actuated via the primary power supply.
If the contact is not opened when the primary circuit is shut
down, the heat pump (fan) issues an error message which
needs to be reset manually.
L1X1L2
L3PEN
6L17L28L39PE10L111L212L313N14
PE
15L116L217L318N19
PE
20L121L222L323N24
PE
X1
1
L
X1
3PE2
N
4L6N7PE8L9N10PE14L115
L1
5
L
11L12N13
PE
16L117N18
PE
X5
1
2 3 4
5 6
7
8
X2
PE
N
N
E1
PE
N
L
N
L
L
N
L
N
55 56
N
L
N
X3
55
56
57
58
59
60
61 62
63 64 65
66
X4
81 82
83 84 85 86 87 88 89
90 91
1
L1
X1
2L23
L35PE
4
N
N
L
8
X5
3x400V / 50Hz
main current
EW / WVU
- idle
periode block
EW / WVU -
Idle periode block
close
open
room station/ remote
control RSS-T / RFF-T
AF external sensor
RLF, PF, WF
return- / buffer-
or heating generator
SF service water sensor
(buffer sensor)
VF1 flow sensor HC1
VE1 varible input 1
KVLF solar kollector
sensor
VF2 flow sensor HV2
VE2 varible input 2
VE3 varible input 3
KSPF solar buffer sensor
relais
for speed control-
led pumps
boiler loading pump/
priority valve
pump for heating
circle without mixer
buffer loading pump
mixer HC1 open
brown
mixer HC1 close
black
pump HC1
mixer HC2 open
brown
mixer HC2 close
black
pump HC2
phase 230V/ 50Hz
230V / 50Hz
control current
electric heating
immenser
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
1x230V / 50Hz
primary current
compressor
radial
fan
primary current
heating immenser
connection
heating immenser
3x400V / 50Hz
primary current
compressor
radial fan
3x400V / 50Hz
primary current
heating immenser
3x400V / 50Hz
electric
heating immenser
1
X2
2 3 4 5 6
PE
N
L
N
L
E1
PE
N
L
N
L
L
N
L
N
55 56
N
L
N
66
90 91
1
L1
X1
2L23L35PE4
N
N
L
8
X5
3x400V / 50Hz
main current
EW / WVU
- idle
periode block
close
open
KVLF solar kollector
sensor
KSPF solar buffer sensor
relais
for speed control-
led pumps
mixer HC2 close
black
pump HC2
230V / 50Hz
control current
4-way valve
(heatpump internal)
companion heating
for condens run-off
connection for
compressor heating
Page 40
Installing digital offset roomstat RS
Live mains voltage lines and sensors or data bus lines
must always be positioned apart from one another. A
minimum distance of 2 cm between the lines must be
observed here. Line crossings are permissible.
Shielded cables must be used as data bus lines.
Recommended designs: J-Y(St)Y 2 x 2 x 0.6
The cable shielding must be earthed on one side on the
protective conductor connection, e.g. on the strain relief
rails of the heat pump. Multiple earthing of a cable is not
permissible (earth loop).
Electrical connection and bus addressing
The two-wire data bus line is connected to terminals A
and B of the two-pole terminal strip on the baseplate.
The connections are not interchangeable and must be
installed according to the A /B marking in the base. If the
two connection lines are swapped over, the display may
be blank.
Data bus addressing
The connection of one or more offset roomstats to the
central unit is carried out via a two-wire data bus line. As
this connection is always made in parallel
on the same cable, the data transfer must be selected via
the relevant assigned bus addresses.
The bus addresses are assigned in accordance with the
table below:
Control unit offset roomstat
function
bus
address
heating circuit
bus
address
Basic
equipment
10
direct heating circuit
mixer heating circuit 1
mixer heating circuit 2
11
12
13
Setting the bus address in the offset roomstat on initial
commissioning
After completing the electrical installation work and
commissioning the system, the following displays will be
shown on the room station:
1. Segment test (all available segments are shown)
2. Language selection
3. Device identication
4. Bus address (setting according to table above)
5. After assignment, the selected setting will appear on
the display. E.g.: Direct heating circuit, central unit 1
If a bus address is subsequently changed, proceed as
follows:
1 - Disconnect the room station from the data bus line
2 - Plug the room station back in, holding down the rotary
dial until the address setting appears
3 - Set new bus address and conrm
Heat pump
Terminal X4 81
Do not earth here!
Page 41
Commissioning information
Before commissioning the TERRA heat pump, the heating side must be checked for tightness, rinsed thorough-
ly, lled and bled carefully.
Commissioning requirements :
The heating and any storage tank must be lled and •
bled.
The electrical installation must be complete and fuse-•
protected in line with legal requirements.
The heat pump may only be switched on if it is lled on •
the cold side and on the heating side, and if the electrical connections have been checked.
During commissioning, the ow temperatures must also •
be set. The switch-off point of 55°C should be checked
and the set shut-down temperature changed as necessary.
The heat pump is equipped with a start-up delay of •
10 minutes so that the compressor only starts running
after this period.
If the heat pump is to be drained on the heating side for •
frost protection, the connection hose on the heat pump
return (plate heat exchanger) must be unfastened.
The clamps on the top part (for fastening
the panels) must be tightened securely
using an Allen key before the machine is
switched on.
Installing RFF room sensor
With a room sensor the room temperature can be monitored, the required room temperature can be adjusted and
the operating mode for a heating circuit can be changed
remotely.
The bus address on the offset roomstat is used to set
which heating circuit the room sensor and the operating
mode adjustment are set for.
The connection is made via a 4-pole data bus.
Recommended shielded connecting cable: J-Y (ST) Y 2
x 2 x 0.6. It is essential here that the assignments to the
connecting terminals (data bus line A and B as well as
power supply + 12 V and GND) are correct.
Setting the bus address (heating circuit number)
The RFF address is set via a rotary coding switch inside
the room sensor according to the table below:
Device
number
Heating circuit
function
heating
circuit
number
Basic controller
1st central unit
1
mixer circuit 1
mixer circuit 2
Boiler circuit
1
2
3
Heating circuit
extension
2nd central unit
2
mixer circuit 1
mixer circuit 2
Boiler circuit
4
5
6
Heating circuit
extension
3rd central unit
3
mixer circuit 1
mixer circuit 2
Boiler circuit
7
8
9
Heating circuit
extension
4th central unit
4
mixer circuit 1
mixer circuit 2
Boiler circuit
A
B
C
Heating circuit
extension
5th central unit
5
mixer circuit 1
mixer circuit 2
Boiler circuit
D
E
F
Page 42
Operation
The TERRA CL heat pump is switched on and off automatically via a fully-automated control system.
For operating the control, please see the separate operating instructions for the control.
Annual inspection and maintenance of the system by customer services is recommended, in particular with regard
to the preserving warranty claims.
Defrost Controller Heating ControllerMain Switch
Enable Heating immenser
Main switch:
The main switch activates both the control current and
the three phase current for the electric heating immerser
and the heat pump compressor.
Activation:
This switch is used to activate the automatic control of the
heat pump.
Electric heating immerser:
The following operating modes are possible:
0: the electric heating immerser is off
I: the electric heating immerser is activated automati-
cally when the bivalence points is not reached and
the control issues an output-dependent request, or if
a fault occurs in the heat pump.
II: The electric heating immerser is only activated
depending on output.
Defrost regulator:
The defrost regulator is an automatically operating control
which optimises the defrost process of the heat pump and
monitors faults.
Heating controller:
Heating programs can be set on the heating controller.
See operating instructions enclosed.
Page 43
Faults
Operation lamp
Fault lamp
The operating indicator is indicating that the heat pump is
ready for operation.
The TERRA CL heat pump is tted with various safety devices so that no damage can be caused to the equipment
in the event of faults.
If the heat pump does not run as anticipated, please
check the following:
1. Is the green indicator light on the outside of the
switch cabinet on?
If not, check the following points:
a) Is the main switch switched on in the electrical
panel?
b) Is the control activation (green switch in the electrical panel) switched on?
c) Is the fuse in the heat pump electrical panel OK?
d) Is the fuse in the main distribution board OK?
2. Is the red fault indicator light on the control panel
on?
Check the error messages on the control panel.
3. Is the heating control displaying an error message?
For more information, please see the control operating instructions.
4. Is the defrost control displaying an error message?
See the following points.
If an error occurs several times in succession, please call your relevant customer service.
Supplier telephone: _______________________________________
The following error messages may be displayed on the
defrost regulator display:
AL1 low pressure fault
Insufcient heat supplied.
Check whether the inlet opening or the evaporator pa-•
ckage is contaminated or the air inlet or outlet is unobstructed.
Air source heat exchanger (evaporator) is heavily iced •
over – please contact your service technician
Fan speed is too low – please contact your service •
technician
Fault-free functioning is not possible as the outside •
temperature is too low (< -15°C).
A loss of refrigerant means that operation is not possib-•
le – please contact your service technician.
AL2 high-pressure fault
Heat intake is too low.
Is the intake or return restricted or blocked?•
Heating circulation pump function is not correct.•
Check whether the circulation pump is running at the •
maximum speed level (level 3). If not, please contact
your service technician
Maximum temperature set is too high – please contact •
your service technician.
Condenser plate heat exchanger in the heat pump is •
blocked with dirt. Please contact your service technician.
AL3 starting current limiter fault
An error in the primary circuit causes the fault.
In the main distribution board, check the fuses for the •
heat pump. Please contact your service technician or
electrician.
AL4 fan fault
Fan is not running despite being triggered.
Check whether the fan is not blocked for any reason. Or •
heavy ice formation on the evaporator.
Check the power supply, or have your electrician check •
it.
ER1, ER2, ER3, ER22, ER30 sensor fault
One or more sensors is faulty. Please contact your service
technician.
COMMISSIONING - MAINTENANCE - SERVICE
Our service technicians will be pleased to assist you on-site.
Your
regional contact partners with contact data can be found
on our website www.idm-energie.com
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