Roca BCH-7 Manual

1
Model BCH
horizontal packaged
air to air heat pump
Technical information
Ref.: N-26844 0700
ClimaRocaYorkS.L.isparticipatingintheEUROVENTCertificationProgramme.
Products are as listed in the EUROVENT Directory of Certified Products,
in the program AC1, AC2 and AC3.
EUROVENT
CERTIFIED PERFORMANCE
CGM-97/013
ACCORDINGTO ISO 14001 STANDARDS
ER-028/1/91
ACCORDINGTO ISO 9001 STANDARDS

Index
General 5
- General description 5
- Nomenclature 5
- Control 5
Technical specifications 5
- Mechanical specifications 5
- Physical data 6
- Nominal features 7
- Test conditions 7
- Correction factors 7
- Nominal flow-rates 7
- Sensitive cooling capacities 8 - 9
- Outdoor fan performance 10
- Indoor fan performance 10
Installation instructions 11
- General 11
- Protection of the environment 11
- Warning signs 11
- Transport 11
- Location 11
- Attaching unit 12
- Drain connections 12
- Clearances 12
- Air ducts 12
- Air intake and discharge orientations 13
- Variations to be performed at jobsite 13
Electrical installation 14
- Start-up procedure 14
- Electrical characteristics 14
- Utilization limits 15
- Balance point adjustment 15
- Logic module 15
- Discharge sensor 15
- Outdoor sensor 15
- Liquid sensor 15
- Balance point 15
- Timer 15
- Stoppage of inferior fan during defrost 15
- Delayed switch-off interior fan 16
- Other 16
Operation 16
- Summer cycle 16
- Winter cycle 16
- Detail module internal connections
with exits to the connector 16
- Function of the pins 16
- Actions according to state of the probe 16
- Module 17
- Indications led autodiagnosis 17
- Operating sequences 18 - 19
- Defrost cycle (timer) 20
- Operating at -15°C 20
- Operation on emergency heat 20
- Other safety features of the electric circuit 20
- Compressor crankcase oil heater 20
- Before finalising the installation 20
Operating instructions 21
- General instroduction 21
- DSL ambient thermostat for 610 heat pump 21
- Operation and start up 21
- Graphic information 24
Maintenance 24
- Cleaning of filters 24
- Cleaning outdoor coil 24
- Priming the dreinage siphon 24
- Indoor unit discharge ducts 24
General dimensions 25 - 27
Wiring diagrams 28 - 41
Optional accessories 42
- Filter rack with filter 43
- Air filter 44
- Indoor electric heaters RH 45
- Duct electric heaters RC-220 46
Page
Page

5
Design level
Voltage:
21 = 230.1.50
22 = 230.3.50
38 = 400.3.50
General
General description
The model BCH heat pump is an air to air type of equipment
that provides air conditioning in summer and in winter by
reversion of its operating cycle.
It can be located either indoors or outdoors since it is
protected to withstand weathering and the centrifugal fans
allow the connection of ductwork.
It is delivered totally equipped, factory tested and ready for
the incorporation of the electric heater accessory, indoor or
for ductwork.
Designed to achieve an important energy saving and a long
operating life by the incorporation of an electronic control
module.
Temperatureadjustmentisachievedbymeansofthe24VAC
ambient thermostat.
Nomenclature
Balance point
Since the heat pump operates by extracting heat from the
outdoor air, it is possible that sometimes this temperature is
so low that the extracted heat is insufficient to satisfy the
heating demand. For these conditions the electronic module
hassixbalancepoints (between- 4and 14°C), oneof which
will be adjusted during the start-up. Below this temperature
the supplementary electric heater will come into operation.
The heat pump will nevertheless continue to operate with a
COPgreaterthanthatoftheelectricheatersuntiltheoutdoor
temperature drops below -20°C.
Belowthistemperaturetheheatpumpwillautomaticallystop
operating and will only use the electric heaters to warm the
space. This prevents the compressor from operating with
very high compression ratios that will shorten its operating
life.
Compressor safeties
A temperature sensing element protects the compressor
against too high discharge temperatures.
Apressure cutoutstops the compressor when the discharge
pressure is too high.
Italso actuates incaseof a refrigerantleakor because ofan
insufficient air flow across the coils.
Defrost control
The defrost cycle starts after a period, set at will, of 30, 60 or
90 minutes after start or last defrost cycle and the liquid line
temperature is -5°C or less.
Start timer
It prevents frequent stops and starts. After stopping, the unit
does not start again until 2 or 5 minutes, set at will, have
elapsed.
Control panel
The control of the BCH heat pump operation is done by
means of thermostat that allows the following:
1- Setting of the desired temperature.
2- Automatic availability of heating or cooling as desired.
3- Controlthat theoperation of the indoor fan be continuous
or intermittent depending on the operation of the com-
pressor.
4- Operate the electric heaters shutting down the rest of the
unit.
Technical specifications
Mechanical specifications
Compressor
Of the vertical hermetic type, mounted on shock absorbent
blocks, equipped with a low consumption motor.
Itisdeliveredwithachargeofaspecialoilthatpreventsfoam
formation and with an electric oil heater.
Compressor oil heater
Keepsthecrankcaseoilhot toeasestartsandpreventtheoil
from being carried away from compressor.
Suction accumulator
Connected to the suction tube of the compressor it protects
itagainstliquid strokes, preventingtheoil from comingoutof
the compressor.
Suction exchanger
Formedbythesuctionandliquidtubes ofthecircuit,protects
the compressor by preventing the liquid refrigerant from
Horizontal packaged heat pump
Nominal power:
Cooling Heating
7 = 6 400 W / 7 100 W
10 = 9 200 W / 10 800 W
12 = 11 600 W / 12 700 W
15 = 14 000 W / 14 300 W
20 = 17 900 W / 18 000 W
25 = 21 700 W / 22 500 W
30 = 27 000 W / 28 500 W
Control
To achieve maximum energy saving and a perfect operation
of the equipment, that will avoid breakdowns and prolong its
operatinglife, the BCHheat pump incorporatesthe following
features:
BCH 7 21 A

6
reaching it. Also it increases the efficiency of the system.
Coils
Of large heat transfer area, made of copper tubes and
aluminum fins.
They are located inside the casing and are therefore pro-
tectedfrombeingdamagedduringtransportandinstallation.
Fans indoor and outdoor fan
Centrifugal type with direct drive motor.
These fans develop sufficient pressure for the installation of
ducts and optional accessories.
Casing
Built of steel sheet with aluminum-zinc protection, with
primer and powder epoxy finish to allow its installation out-
doors.
Supplementary electric heaters
Of the air exposed wires type that allow a rapid heat dissipa-
tion, avoiding the thermal inertia that could affect com-
ponents.
BCH-7 BCH-10 BCH-12 BCH-15 BCH-20 BCH-25 BCH-30
Quantity 1 1 1 1 1 1 1
Nominal power kW 2.8 4.3 4.7 5.3 6.9 9 10
Power supply V.ph.Hz. 230.1.50
Quantity 1 1 1 1 1 1 1
Tubes length x height 5 x 18 5 x 21 5 x 21 5 x 21 5 x 27 5 x 24 5 x 24
Fins per inch 12 12 14 12 14 14 14
Face area m20.32 0.41 0.51 0.51 0.65 0.7 0.89
Tubes diameter mm (Inch) 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8")
Quantity 1 1 1 1 1 1 1
Tubes length x height 3 x 18 4 x 21 4 x 21 4 x 21 4 x 27 3 x 24 4 x 24
Fins per inch 12 12 12 12 12 12 12
Face area m20.22 0.25 0.37 0.37 0.47 0.61 0.61
Tubes diameter mm (Inch) 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8") 9.52 (3/8")
Quantity 1 1 1 1 1 1 1
Turbine diameter mm 270 320 320 320 320 320 320
Turbine width mm 270 240 240 240 320 240 320
Nominal power kW 0.58 0.99 0.99 0.99 1.1 1.1 1.5
Nominal motor rpm 950 950 950 950 950 950 1 420
Power supply V.ph.Hz. 230.1.50 230.1.50 230.1.50 230.1.50
Quantity 1 1 1 1 1 1 1
Turbine diameter mm 240 270 320 320 320 320 320
Turbine width mm 240 200 240 240 240 240 240
Nominal power kW 0.38 0.54 0.95 0.95 0.99 1.1 1.1
Nominal motor rpm 950 950 950 950 950 1 410 1 410
Power supply V.ph.Hz. 230.1.50 230.1.50 230.1.50 230.1.50
R-22 refrigerant charge kg 2.95 4.2 4.5 4.75 7.5 5.9 7
Approximation nett weight kg 193 223 271 275 340 355 412
Approximation gross weight kg 219 257 311 315 370 395 462
Dimensions with standard packing cm 132x132x65 136x139x71 155x160x71 155x160x71 155x160x87 176x180x78 176x220x78
Indoor
fan
motor
Model
Compressor
Outdoor
coil
Indoor
coil
Outdoor
fan
motor
230.3.50
400.3.50
Physical data
230.3.50
400.3.50 230.3.50 400.3.50 230.3.50 400.3.50 230.3.50 400.3.50 230.3.50 400.3.50
230.3.50
400.3.50 230.3.50 400.3.50 230.3.50 400.3.50
230.3.50
400.3.50 230.3.50 400.3.50 230.3.50 400.3.50

7
BCH-7 6 400 3 800 7 100 3 700
BCH-10 9 200 5 000 10 800 4 000
BCH-12 11 600 6 700 12 700 5 000
BCH-15 14 000 6 900 14 300 5 420
BCH-20 17 900 8 900 18 000 7 780
BCH-25 21 700 10 000 22 500 7 500
BCH-30 27 000 14 600 28 500 13 500
BCH-7
BCH-10
BCH-12
BCH-15
BCH-20
BCH-25
BCH-30
2 175
2 780
3 900
3 900
4 675
4 900
5 800
2 100
3 350
3 410
3 410
4 675
5 200
6 400
Model
Unit
Nominal features
Summer Winter
Cooling capacity W Consumption W Heating capacity W Consumption W
DB WB DB WB DB WB DB WB
35 24 27 19 7 6 20 12
Indoor temperature °C
14 10 6 0 -8
23 1.20 1.04 0.96 0.77 0.58
20 1.25 1.10 1.00 0.80 0.69
17 1.30 1.13 1.04 0.83 0.63
Summer Winter
Outdoor unit air
intake temperature °C WB
Test conditions
Correction factors
Correction factors for the cooling capacities
Correctionfactorsforthecoolingcapacitywithregardindoor
and outdoor temperatures.
Correction factors for the heating capacities
19 25 30 35 40 46
23 - 1.20 1.15 1.11 1.06 1
19 1.10 1.08 1.04 1 0.96 0.90
14 0.88 0.86 0.84 0.82 0.79 0.74
Outdoor unit air
intake temperature °C DB
Note:
Indoor unit air intake DB temperatures, between 21 & 32 °C.
WB = Wet bulb. DB = Dry bulb.
Correction factors for the cooling capacity for flow-rates
different from the nominal ones in the indoor coil.
130
1.046
1.118
1.025
120
1.032
1.075
1.017
100
1
1
1
110
1.016
1.038
1.009
80
0.960
0.945
0.980
90
0.980
0.973
0.990
Flow %
Total capacity
Sensitive capacity
Absorb. comp. poten.
Correction of the real temperature of the air entering the
outdoor coil for flow-rates different from the nominal ones.
Flow % 70 80 90 100 110 120 130
Correction in °C over the
real air intake temperature
at the outdoor battery unit 5 3 1.5 0 -1 -2 -2.5
Correction of the real temperature of the air entering the
outdoor coil for flow-rates different from the nominal ones.
Correction in °C over the real
air intake temperature at the
outdoor battery unit -2 -1.5 -0.5 0 0.5 1 1.2
Outdoor temperature °C Indoor temperature °C Outdoor temperature °C
25
37
50
50
50
62
62
50
50
50
50
50
50
50
Indoor unit
air intake
temperature
°C WB
Indoor unit
air intake
temperature
°C DB
Nominal flow-rates
The cooling and heating capacities in the corresponding
tables are valid for the following nominal flow-rates.
For other flow-rates, apply the correction factor from the
corresponding table.
Flow % 70 80 90 100 110 120 130
Indoor fan
nominal
m3/h
Static pres.
nominal
Pa
Out. fan
nominal
m3/h
Static pres.
nominal
Pa

8
Dry temperature of air °C (DB)
Sensitive cooling capacities
Compressor
power
absorbed
kW
WWWWW
24
22 27 29
Sensitive capacity (W)
Model Outside
air dry
temperature
°C (DB)
Air intake
humid
temperature
°C (WB)
22 9 300 2 600 3 700 4 900 6 000 2.18
19.5 8 300 3 500 4 600 5 700 6 800 2.08
17 7 200 4 300 5 400 6 500 7 200 1.92
22 8 200 2 200 3 300 4 500 5 600 2.51
19.5 7 500 3 200 4 300 5 400 6 500 2.38
17 6 800 4 100 5 200 6 300 6 800 2.22
22 7 800 2 100 3 200 4 300 5 400 2.88
19.5 6 700 2 800 4 000 5 100 6 200 2.75
17 5 700 3 600 4 800 5 700 5 700 2.48
22 13 600 3 700 5 500 7 200 9 000 3.25
19.5 12 200 5 200 7 000 8 700 10 500 3.10
17 10 600 6 400 8 200 10 000 10 600 2.85
22 12 000 3 200 8 000 6 700 8 500 3.75
19.5 11 000 4 700 6 500 8 200 10 000 3.58
17 10 000 6 200 8 000 9 700 10 000 3.20
22 11 400 3 000 4 700 6 500 8 300 4.30
19.5 9 800 4 200 6 000 7 800 9 000 4.10
17 8 400 5 500 7 200 8 400 8 400 3.65
22 17 600 4 600 7 300 10 000 12 700 4.15
19.5 16 400 7 000 9 700 12 400 15 100 3.90
17 14 800 9 200 11 900 14 600 14 800 3.75
22 16 500 4 200 6 900 9 600 12 300 4.65
19.5 14 900 6 400 9 100 11 800 14 500 4.45
17 13 400 8 600 11 300 13 400 13 400 4.25
22 14 700 3 500 6 200 8 900 11 600 5.30
19.5 13 700 6 000 8 700 11 400 13 700 4.95
17 12 200 8 100 10 800 12 200 12 200 4.70
25
35
45
25
35
45
25
35
45
BCH-7
BCH-10
BCH-12
Total
capacity

9
Dry temperature of air °C (DB)
Sensitive cooling capacities
Compressor
power
absorbed
kW
WWWWW
24
22 27 29
Sensitive capacity (W)
Model Outside
air dry
temperature
°C (DB)
Air intake
humid
temperature
°C (WB)
22 19 400 - 8 300 11 700 15 200 4.70
19.5 17 800 7 700 11 100 14 600 17 800 4.60
17 16 300 10 700 14 100 16 300 16 300 4.40
22 17 600 - 7 600 11 100 14 500 5.50
19.5 16 300 7 100 10 600 14 000 16 300 5.10
17 14 900 10 100 13 500 14 900 14 900 4.90
22 15 800 - 7 100 10 500 13 900 6.20
19.5 14 500 6 600 10 000 13 400 14 500 5.80
17 13 300 9 500 13 000 13 400 13 400 5.50
22 24 410 - 10 200 14 150 19 180 6.30
19.5 22 670 9 620 13 600 17 440 22 600 6.20
14 18 830 19 200 18 800 18 830 18 830 5.90
22 23 480 - 9 400 14 500 18 400 7.20
19.5 20 930 8 370 12 600 17 600 21 600 7.00
14 18 480 15 530 17 090 18 300 18 300 6.60
22 21 160 - 8 820 13 900 17 900 8.00
19.5 19 340 7 870 11 690 16 900 19 600 7.80
14 16 290 14 730 16 310 16 500 16 270 7.30
22 26 040 8 005 10 791 14 971 17 761 6.64
19.5 23 436 11 466 14 253 18 432 21 223 6.95
17 21 700 15 181 17 968 21 700 21 700 7.27
22 24 087 7 330 10 116 14 296 17 082 7.51
19.5 21 700 10 812 13 599 17 778 20 564 7.90
17 19 964 12 957 15 743 19 923 19 964 8.30
22 21 700 6 580 9 366 13 545 16 332 8.69
19.5 19 530 10 067 12 853 17 033 19 530 9.09
17 17 794 13 585 16 371 17 794 17 794 9.48
22 26 040 7 777 11 304 16 594 20 126 8.23
19.5 23 436 12 200 15 727 21 018 23 436 8.62
17 21 700 16 866 20 393 21 700 21 700 9.02
22 24 087 7 133 10 660 15 950 19 477 9.31
19.5 21 700 11 573 15 100 20 391 21 700 9.80
17 19 964 15 207 18 735 19 964 19 964 10.29
22 21 700 6 414 9 941 15 232 18 759 10.78
19.5 19 530 10 856 14 383 19 530 19 530 11.27
17 17 794 15 327 17 794 17 794 17 794 11.76
25
35
45
25
35
45
25
35
45
BCH-15
BCH-20
BCH-25
Total
capacity
25
35
45
BCH-30

10
BCH-30
2 000
2 200
2 410
2 550
3 100
3 200
3 300
3 400
3 500
3 600
3 100
3 250
3 370
3 450
3 560
3 700
4 050
4 400
4 600
4 750
4 900
5 100
4 500
4 800
4 910
5 050
5 200
5 250
5 350
5 450
5 490
5 980
6 200
6 400
6 480
6 600
6 700
540
560
580
590
900
920
940
960
970
990
880
920
930
940
970
980
1 050
1 070
1 120
1 150
1 180
1 230
1 130
1 200
1 250
1 275
1 295
1 320
1 335
1 388
1 355
1 440
1 500
1 555
1 585
1 600
1 665
6
4
2
0
10
8
6
4
2
0
10
8
6
4
2
0
10
8
6
4
2
0
14
10
8
6
5.1
4
2
0
14
10
8
5.1
4
2
0
350
365
370
380
390
480
495
510
525
540
875
890
910
930
950
970
990
1 020
900
1 000
1 020
1 050
1 100
1 120
1 180
1 230
1 270
940
1 050
1 100
1 160
1 220
1 290
1 345
1 390
1 220
1 365
1 430
1 585
1 680
1 750
1 810
58.8
39.2
19.6
0.0
98.0
78.4
58.8
39.2
19.6
0.0
98.0
78.4
58.8
39.2
19.6
0.0
98.0
78.2
58.7
39.1
19.6
0.0
137.2
98
78.4
58.8
49.98
39.2
19.6
0
137.2
98
78.4
49.98
39.2
19.6
0
0.47
0.52
0.58
0.61
0.65
0.69
0.75
0.77
0.82
0.86
0.91
0.96
1.00
1.02
1.07
1.10
1.13
1.16
1.06
1.11
1.15
1.19
1.25
1.28
1.32
1.36
1.39
1.10
1.22
1.25
1.31
1.36
1.43
1.50
1.52
1.30
1.44
1.48
1.61
1.68
1.74
1.77
Power
absorbed
m3/smm WG Pa m3/h
78.4
58.8
39.2
19.6
0
78.4
58.8
39.2
19.6
0
137.2
117.6
98
78.4
58.8
39.2
19.6
0
156.8
137.2
117.6
98.0
78.2
58.7
39.1
19.6
0.0
156.8
117.6
98
78.4
61.7
39.2
19.6
0
156.8
117.6
98
61.7
39.2
19.6
0
1 700
1 900
2 100
2 200
2 350
2 500
2 700
2 800
2 950
3 100
3 300
3 450
3 600
3 700
3 850
3 960
4 100
4 200
3 800
4 000
4 150
4 300
4 500
4 600
4 750
4 900
5 000
3 980
4 400
4 520
4 750
4 900
5 180
5 420
5 500
4 700
5 200
5 350
5 800
6 050
6 280
6 400
Note: Performance calculated with wet coil including filters, except in
models 25 and 30.
BCH -12
BCH -15
BCH -7
BCH-20
BCH -12
BCH -15
BCH -10
BCH -7
mm WG Pa m3/sm3/h W
Power
absorbed
BCH -10
BCH-25
Air flow
Static pressure
available
Model
Static pressure
available Air flow
Model
Outdoor fan performance
8
6
4
2
0
8
6
4
2
0
14
12
10
8
6
4
2
0
16
14
12
10
8
6
4
2
0
16
12
10
8
6.3
4
2
0
16
12
10
6.3
4
2
0
BCH -20
BCH-30
BCH-25
0.56
0.61
0.67
0.71
0.86
0.89
0.92
0.94
0.97
1.00
0.86
0.90
0.94
0.96
0.99
1.03
1.12
1.22
1.28
1.32
1.36
1.42
1.25
1.33
1.36
1.40
1.44
1.45
1.48
1.51
1.52
1.66
1.72
1.77
1.8
1.83
1.86
W
Indoor fan performance

11
Installation instructions
General
The BCH heat pumps are delivered as factory charged and
tested packaged units. Designed to be installed with ducts,
on terraces, rooftops, in lofts or basements.
Protection of the environment
Packing
Packingismadeofrecyclablematerial.Thedisposalofsame
should be carried out in accordance with the regulations on
selective residue disposal established by the local authori-
ties.
Disposal of the unit
When dismantling after a long service life, its components
should be ecologically salvaged. The cooling circuit is full of
HCFC-22 refrigerant which should be salvaged and, finally,
returned to the gas manufacturer for recycling.
Oilwillremainintheairtightcompressorso,itwillbereturned
along with the sealed circuit.
The air conditioning unit will be deposited wherever estab-
lished by the local authorities for its selective disposal.
Warning signs
The following signs indicate the presence of potentially
dangerous conditions for the users or service personnel.
Whenever found on the unit itself, keep in mind the warning
indicated by each one.
Transport
The units should always be transported in a vertical position
to prevent oil from leaking out of the compressor. If for some
reasontheunitmustbetemporarilymovedfromthisposition,
the time that it rests in a different position should be kept to
a minimum.
Location
The unit should be placed in a location that leaves a perma-
nentaccessformaintenanceservice,eitherthroughtheside
panels, or top cover.
They can be installed in any outdoor location. If installed
indoors in basements, lofts, etc., the ducts for outdoor air
intake and exhaust should be connected.
When the unit is installed indoors, consideration should be
giventothegreatquantityofwatercondensedbytheoutdoor
coilduringwinteroperation,thatmustbedrainedthroughthe
drain pipe.
Occasionally, when the operating cycle is reversed in winter
to remove the frost that forms on the coil, the air could carry
water droplets. This should therefore be kept in mind when
selecting the place of installation and also the possibility of
Attention: It is compulsory to read the
instructions prior to any handling.
This sing indicates an electrical risk or
danger.
Attention: Not to touch the hot surfaces.
Attention: The unit has remote control
system and can start automatically. Two
minutes prior to having access to the
interior, the power supply should be
disconnected so as to avoid any contact
with the fan turbine in operation.
Attention: Fan in operation.

12
the drain pipe becoming clogged by dust, dirt or some other
material should be foreseen.
Attaching unit
From the roof
The unit will be fastened to the roof by four M-10 bolts as
shown in figure. For this type of installation the use of
vibration isolators is recommended.
Whenfasteningunitcareshouldbetakenthatitiscompletely
horizontal or slightly tilted towards the drain to avoid the
dripping of condensed water (use an air bubble level).
The connections to the unit should be done with copper tube
of 22 mm O.D.
Resting on the ground
Ifunitisplacedoutdoorsontheground,itshouldberaisedon
supports to avoid the possibility that snow accumulation
blocks the air intakes.
Drain connections
The pan drain lines of the indoor and outdoor units must be
installed with a water trap with a minimum level difference of
75 mm between the connection to the unit and the line after
thewater trap(see figure). This is necessary to avoidthe fan
generated negative pressure preventing the drain pan from
draining.
The drain line should have a minimum slope of 20 cm per
meter length.
Attention:
When the heat pump operates under outdoor temperatures
below 5°C, the drain tube could become obstructed by ice
formation.
Iftheunitislocatedoutdoors,thepossibilityofthishappening
should be prevented by installing an electric heater on the
drainconnectionandwiringitaccordingtothecorresponding
diagrams.
Clearances
Freespacemustbeallowedforintheinstallationofeachunit
for:
a) Air intake and discharge from the outdoor unit.
b) Connecting the drainage and wiring pipes.
c) Air ducts.
d) Maintenance servicing.
e) Connecting up of the electrical supply.
The minimum distances, indicated in the overall dimensions
diagrams, must always be respected with regard to possible
obstaclesto thefree circulationof air,or theoperator's work.
Air ducts
1) Air ducts should be connected to the unit isolated by a
sleeveofaflexible,preferablynon-combustiblematerial,
to prevent transmission of the unit's own vibration. If
ducts are made from a flexible material they will not
transmit vibration.
2) Itisadvisabletoinstalladamperineverydischargeduct,
thus making possible a correct balance of the system.
3) Allowfor aneasy accessto theair filtersfor replacement
and cleaning.
4) If the air discharge of the outdoor coil is done through
ducts, it is advisable that the first meter section be of
galvanized sheet to avoid corrosion produced by water
droplets carried by the air.
It is very important to take the maximum cara with the support of the
internal unit when hanging it from a false ceiling. Make sure that the
falseceilingisstrongenoughtowithstandtheweightoftheunit.Before
hangingtheunit,checkthestrength ofeverysuspensionbolt installed.
Attention: It is essential to use all fixing points on the unit.
The BCH-7, 10, 12, 15 and 20 have 4 fixing points.
The BCH-25 and 30 have 6 fixing points.
CAUTION
2% SLOPE
75 mm MINIMUM
PLUG

13
Air intake and discharge orientations
Factory supplied orientation.
BCH-7,10,12,15 & 20
BCH-25 & 30
Variations to be performed at jobsite
Starting from the standard unit the orientations of the air
intake and discharge of the condenser and evaporator fans
can be changed to obtain any of the combinations shown in
the figure below.
BCH-7,10,12,15 & 20
BCH-25 & 30
*) This variation of the air intake can be used only in those
installations in which the heat pump is protected from direct
rainfall, since it does not allow the rain protection grille (optional
accessory) to be fitted.
DISCHARGEINTAKE
INDOOR
COIL
OUTDOOR
COIL
DISCHARGE INTAKE
OUTDOOR SIDE
INDOOR SIDE
ELECTRIC
PANEL
INTAKE
INTAKE DISCHARGE
INDOOR
COIL
OUTDOOR
COIL
DISCHARGE
OUTDOOR SIDE
INDOOR SIDE
ELECTRIC
PANEL
INTAKE
(STANDARD)
DISCHARGE
(STANDARD)
OUTDOOR SIDE
INDOOR SIDE
INTAKE
(STANDARD) DISCHARGE (STANDARD)
DISCHARGE
(OPTIONAL)
INTAKE
(OPTIONAL)
INTAKE
(OPTIONAL)
DISCHARGE
(OPTIONAL)
*
INTAKE
(STANDARD)
DISCHARGE
(STANDARD)
DISCHARGE
(OPTIONAL)
INTAKE
(OPTIONAL)
DISCHARGE
(OPTIONAL)
INTAKE
(STANDARD) DISCHARGE (STANDARD)
OUTDOOR SIDE
INDOOR SIDE

14
230.1.50
230.3.50
400.3.50
230.3.50
400.3.50
230.3.50
400.3.50
230.3.50
400.3.50
230.3.50
400.3.50
230.3.50
400.3.50
32
32
20
40
32
40
32
50
32
50
32
63
32
Power supply V.ph.Hz. Consumption A
CompressorFan Indoor
fan
Outdoor
fan
Power
supply
cables
min.
cross
section
Automatic
circuit
breaker
Model
Electrical characteristics
Compressor mm2
Run
Run
Nominal
Outd. -
BCH -7 14.3
10.9
6.3
12.6
7.3
13.3
7.7
21.1
12.2
29.3
14.2
36
16.5
2.8
5.1
5.1
5.2
5.2
5.2
5.2
4.2
2.4
5.5
3.2
5.5
3.2
4
4
2.5
6
4
6
4
10
4
10
6
16
10
1.7
2.6
2.6
5.2
5.2
5.2
5.2
4.2
2.4
4.5
2.6
6.0
3.5
230.3.50
400.3.50
230.3.50
400.3.50
230.3.50
400.3.50
BCH -20
BCH -15
BCH -12
BCH -10
230.1.50
Electrical installation
In every case the established national regulations should
be applied.
Each heat pump is delivered with a control box, to which the
power supply will be connected across a fused main discon-
nect switch or automatic circuit breaker.
The electric heater, if available, should be installed with
power supply line and switches independent from those of
the heat pump.
Start-up procedure
a) Connect the power supply cable and earth to the
corresponding boards on the controls box.
b) Give power to the auxiliary control line at 220/240.1.50.
c) Connect the room thermostat line to 24 V on the boards
provided in the heat pump.
d) Before start-up connect the main switch or automatic
circuit breaker to supply power to the electric oil heater in
the compressor crankcase.
Compressorshouldnot be started before a minimum
of 8 hours have passed.
This is necessary to evaporate any liquid refrigerant that
could have mixed with the compressor oil.
Loose cables can cause overheating of the connectors or an
inadequate operation of the unit. Fire risk could also exist.
Fot this reason, make sure that all cables are properly connected.
Do not supply power to the unit and do not start up operations until the
tubing and electrical connections with the outdoor unit have been
completed.
Make sure that the electrical supply is correctly connected to the units,
as shown in the electrical diagrams.
BCH -25
BCH -30
A
Important: The size of the circuit breaker and the cross-section of the supply and control lines are only as a guide and should be corrected in
accordance with the conditons at the jobsite, distance between units, and current legislation.
Indoor

15
Balance point adjustment
Thebalancepointisthelowestoutdoortemperatureatwhich
the heat pump can heat the space without the use of the
supplementary electric heaters.
The balance point depends on the following:
1) Design outdoor temperature.
2) Building's heat loss.
3) Pump's capacity.
The balance point is usually predetermined by the instal-
lation's project, but if it has not been predetermined the
factory's adjustment at 6°C can be kept.
Logic module
The control module responds to the thermostat's demand
signal, it examines the values given by the sensors outdoor,
discharge and liquid and determines if the heat pump and/or
the supplementary electric heater must operate.
Discharge sensor
It is a thermistor located in the discharge line of the
compressor,connectedinserieswithahighpressurecutout.
It protects the compressor against high discharge tempe-
ratures (and pressures).
It stops the compressor when the discharge temperature
exceeds the set point or the pressure is greater than
28 kg/cm2.
Itprotects thecompressor when there is a refrigerant leak or
a flow reduction through outdoor or indoor coils.
It allows the reset of the compressor circuit after a lockout
condition, by removing the power supply to the control
module, or pressing the reset button.
Outdoor sensor
Thisisathermistorlocatedintheairintakeoftheoutdoorcoil,
that registers the air temperature.
It controls the heat pump operation, stopping it when the
outdoor temperature nears -15 °C. This prevents the
compressor from operating at a high compression ratio that
could damage it.
Allows the connection of the duct electric heater (optional)
controlled by the 2nd stage of the room thermostat if the
outdoor temperature is less than -15 °C.
It allows by means of the balance point for the adjustment of
the temperature at which the supplementary electric heater
should come into operation.
Utilization limits
Liquid sensor
It is connected in the liquid line of the outdoor coil.
Thissensorstartsthedefrostcycleafter30,60or90minutes
from start or last defrost cycle depending on selection, if the
temperature it senses is -5 °C or less.
Indicates the end of the defrost cycle when the liquid
temperature reaches 13 °C or stays at a minimum of 7 °C
during 1 minutes.
Prevents the cycle from starting in mild climates since
sufficiently low liquid temperatures are not detected.
The initial time reading for defrosting of 30, 60 or 90 minutes
is nominal. These times assume an exterior temperature of
2°C, a highly unfavourable level causing much frost
formation.
Atlower temperatures thetotal humidity contentof the ambi-
ent air is lower, permitting prolongation of the defrost cycles,
saving energy. For example: at -10°C exterior temperature
the initial time readings for defrost will be 60, 90 and 120
minutes.
Balance point
Preventstheoperationofthesupplementaryheating system
when the outdoor temperature is above the balance point as
adjusted on the plaque.
This way the electric heater is not used as long ads the heat
pump is capable of meeting the space heating demand.
Thebalancepoint can beadjusted between 14°Cand -4 °C.
This way an additional outdoor thermostat is not needed.
Timer
Delays start during 5 or 2 minutes to avoid repeated starting
cycles. This way operating pressures are equalized before
the compressor is started. If the thermostat or manipulation
cause false contacts the heat pump is not affected.
It delays the start after a power supply cut, thus allowing the
line voltage to regain its normal level.
Stoppage of interior fan during defrost
This module allows the option of stopping the interior fan
duringthe defrost cycles.This option isonly for whenit is not
possible to instal an auxiliary electric heater.
- With the JP-19 bridge in position (factory standard) the
interior fan continues to function during defrosting.
- WiththeJP-19bridgeopen(modifiedatjobsite)theinterior
fan is deactivated.
Minimum Maximum Minimum Maximum Cool Heat Cool Heat Cool WB Heat DB Cool WB Heat DB
198 254 342 436 19 -20 (1) 46 24 15 10 (2) 23 27
Indoor coil inlet air
temperature
Voltage limits Outdoor coil inlet air
temperature DB
Operating cycle
Operating cycle
Nom. 400 VNom. 230 V Minimum °C Maximum °C Maximum °CMinimum °C
Notes: WB - Wet bulb. DB - Dry bulb.
(1) At an outdoor temperature of -20 °C only the emergency electric heater (optional) continues to operate.
(2) The equipment can work for a short period at a temperature of less than 10°C in order to raise the air temperature in the conditioned space to
10 °C.

16
Delayed switch-off of interior fan
The interior fan will continue to function for one minute after
the stop order.
Thisisto permit dissipationofthe energy accumulatedin the
interior interchanger and represents an energy saving.
Optionally, at the jobsite, this option can be deactivated,
leaving the JP-20 option of the module open.
Other
- Connector for computer switching.
- Possibility of lowering timer to 2 minutes.
- Buttons:
Test. Lowers delay.
Direction for communication.
Reset. Restarts the control.
Filters. Delete dirty filter counter.
- Leds:
Standby. Indicates compressor delay.
Filters. Dirty filters.
Reset. Self-diagnosis and reset Led.
Operation
Summer cycle
In summer functioning the 4-way valve is energised.
In the corresponding figure the circuit followed by the refrig-
erant is shown.
Winter cycle
On winter cycle the discharge gas goes to the indoor coil
which operates as the condenser.
The outdoor coil becomes the evaporator.
Reversingvalveisdeactivated.Refrigerant'scircuitisshown
in figure.
Detail module internal connections with exits
to the connector
Function of the pins
Actions according to state of the probe
321
6 8 4
957
12 10
11
ENTRY EXIT
(G)
(Y) 11
29
3
10 8(R) 12
(B) 6
(W) 1
67
24V LINE
(G1) FAN
COMPRESSOR
DISCHARGE RELAY
INTERIOR HEATER
DUCT HEATER
NO
YES INTERIOR FAN FUNCTION
DURING DEFROST
JP19
DISCHARGE TEMPERATURE LOCK-OUT
130 C
110 C
JP21
- SCALE OF BALANCE: 14,10,6,4,2,0,-2 and -4 °C.
- DELAY TIME START-UP:2´,5´.
- TIME BETWEEN TWO DEFROSTS: 60´,30´,90´.
- LOW TEMPERATURE DISCONNECTION SCALE: -5,-10,-15,-20 °C.
THIS PLAQUE IS DELIVERED WITH 7 BRIDGES (PIN) AS FOLLOWS:
CLOSING CIRCUIT: 5´,60´,6 °C,-15 C,JP19, JP20 and NTC.
WITHOUT CLOSING CIRCUIT: JP21.
STOPPAGE INTERIOR FAN DELAYED
1 MINUTE AFTER COMPRESSOR, WITH
THERMOSTAT G TERMINAL DISCONNECTED
NO
YES
JP20
MICRO-93 PROBE (CODIGO 3785028 . 3785030 . 3785032)
NTC MICRO-97 PROBE (CODIGO 3785050 . 3785052 . 3785054)
LIQUID PROBE OPEN - REPEATS DEFROST
CYCLES ACCORDING
TO TIME
DISCHARGE PROBE CLOSED - STOPPAGE OF COM-
PRESSOR (LOCK OUT)
EXTERIOR PROBE OPEN - CONNECTS THE
EMERGENCY
HEATER
- STOP THE COMPRESSOR
DEFROST CLOSED ()
FOR 12 SECONDS
WITH LIQUID
TEMPERATURE < 4 °C
- BEGINS DEFROST
-

17
Module
Indications led autodiagnosis
INPUT Y
INPUT G
INPUT W
INPUT O
STANDBY FILTERS RESET TEST RESET FILTERS
JP19 JP20 JP21 NTC
2 5
30 60 90 14 10
6 4 2 0
-2 -4
-5
-10 -15
-20
BUTTONS
TEST.- DIMINISHES TIMER/DIRECTOR PLATE COMMUNICATION
RESET.- RESTARTS CONTROL
FILTERS.-DIRTY FILTERS CONTACTOR DELETE
LEDS
STANDBY.- INDICATES COMPRESSOR DELAY
FILTERS.- DIRTY FILTERS
RESET.- SELF-DIAGNOSIS/RESET LED
006791024
BCH/BCV-97/A
321
6 8 4
95 7
12 10 11
CONTROL
CABLE
CONNECTOR
COMMUNICATION CONNECTOR BY COMPUTER
B4
LIQUIDO
LIQUID
B3
DESHIELO
DEFROST
B2
DESCARGA
DISCHARGE
B1
EXTERIOR
OUTDOOR
BCH/AVO
ROCA CODE SERIAL
NUMBER VALIDITY PLATE
CORRECT FUNCTIONING
AS PROGRAMMED
LOCK OUT DUE TO COMPRESSOR
DISCHARGE TEMPERATURE
ABOVE 130 °C
LOCK OUT DUE TO PRESSURE
EXCEEDING 28 bar OR FAN
THERMIC RELAY
LOCK OUT DUE TO TWO OR MORE
DEFROSTAT TEMPTS IN LESS THAN
5 MINUTES (ONLY IF THERE IS NO
BRIDGE IN 30, 60 OR 90 MINUTES)
IMPULSES 01234567
0
1
0
1
0
1
0
1
0 = LED SWITCHED OFF 1 = LED ILLUMINATED
×

18
Summer cycle diagram
Operating sequences
See relevant electrical diagrams.
Summer cycle: Thermostat in COOL position
1) The 4-way valve is activated through the thermostat.
2) If the fan operating mode in the ambient thermostat is in
CONTINUOUS, the contactor is activated and the fan
functions continuously.
3) With the logic module timing, the unit will start ip after 5
minutes.
4) When the thermostat contact connects, it activates the
contactor and starts the compressor. If the fan operating
modeissetto«AUTO»,thefanstartssimultaneouslywith
the compressor.
5) The unit will function intermittently in response to the
corresponding signal from the ambient thermostat to
satisfy the cooling demand.
6) When the unit stops at the end of an operating cycle, or
through a power failure, the logic module will not allow it
to start up again until 5 minutes have elapsed. This is to
protectthecompressorbyallowingtheoperatingvoltages
to even up.
7) If the diescharge pressure exceeds 28 kg/cm2, or the
discharge temperature is over 130°C, the logic module
will switch off the unit, leaving the system in lock-out.
8) To reset after a lock-out, turn the power supply to the unit
off, or set «OFF» on the thermostat and then reset
«HEAT» or «COOL».
The system will re-set and the unit will start up after 5
minutes.
CHECK
VALVE
SUCTION
ACCUMULATOR
CAPILLARY
TUBE
INDOOR
COIL
CHECK
VALVE
4 WAY
REVERSING
VALVE
COMPRESSOR
CONTACT
EXCHANGER
FILTER
CAPILLARY
TUBE
OUTDOOR
COIL

19
Winter cycle diagram
Winter cycle: Thermostat in HEAT position
1) The 4-way valve is deactivated, allowing the position for
the heating circuit, which means that the indoor coil acts
as condenser and the outdoor one as evaporator.
2) If the fan operating mode in the ambient thermostat is in
the CONTINUOUS position, the contactor is activated
and the fan functions continuously.
3) With the logic module timing, the unit will start up after 5
minutes.
4) When the first stage of the thermostat connects, it
activates the contactor and starts the compressor. If the
fan operating mode is set to «AUTO», the fan starts
simultaneously with the compressor.
5) The unit will function intermittently in response to the
appropriate signals from the ambient thermostat to
satisfy the demand for heating.
6) If the unit stops, after an operating cycle, or through a
power failure, the logic module will not allow it to start up
again until 5 minutes have elapsed.
This is to protect the compressor by allowing the
operating voltages to even up.
7) If the discharge pressure exceeds 28 kg/cm2, or the
discharge pressure is over 130°C, the logic module will
stop the unit, leaving the system in lockout.
8) Toresetafteralock-out,turn thepowersupplytotheunit
off, or set «OFF»on the thermostat and then reset
«HEAT»or «COOL».
Thesystenwillre-setandtheunitstartupafter5minutes.
9) The auxiliary heater is activated when the auxiliary
heating stage of the thermostat is connected. The logic
moduleallowstheindoorauxiliaryheatertofunctionifthe
outdoor temperature is below the balance point. If the
outdoor temperature is above that set as the balance
point, the indoor heater does not function.
10) The emergency heater (complementary) is connected
when the outdoor temperature is lower than that
preselected as the operating limit (-15°C, logic module),
andtheambientthermostatdemandsthesecondheating
stage.
CAPILLARY
TUBE
INDOOR
COIL
CHECK
VALVE
4 WAY
REVERSING
VALVE
COMPRESSOR
CONTACT
EXCHANGER
FILTRE
CAPILLARY
TUBE
SUCTION
ACCUMULATOR
CHECK
VALVE
OUTDOOR
COIL

20
Defrost cycle (timed)
The ice which is produced on the outdoor coil during the
heating cycle must be eliminated when it begins to block the
coil.
Thedefrost cycle beginsafter aperiod selected between30,
60 & 90 minutes from the start-up or the last defrosting, and
when the evaporation temperature drops to -5 °C or less.
The logic module activates the defrost relay, which:
- Activates the 4-way valve to go into the cooling cycle.
- Switches off the outdoor fan.
The defrost cycle finishes when the liquid temperature is
sufficiently high, measured by a thermistor 13 °C, or when, if
itdoesnotheatup,itreachesaminimumof7°Cfora1minute
period; also after 12 minutes from its beginning.
When the defrost cycle finishes, the logic module
disconnects the defrost relay, reestablishing normal
operating conditions of the heating cycle.
If the unit triess to go into another defrost cycle in less than 5
minutes, the logic module switches it off, leaving the system
in lock-out.
Operating at -15°C (optionally -5, -10, -20)
When the outdoor temperature is less than -15°C there is no
justification for running the compressor with the limited
amount of heat it generates.
Ifthelogicmoduledetects,through athermitorintheexterior
air entry, a temperature lower than -15°C, it acts as follows:
- It disconnects the compressor.
- It switches on the emergency heater (if there is one
installed)controlledbythethermostat'ssecondstage.(The
auxiliary heater will also continue to function, governed by
the thermostat's second stage).
- It leaves the indoor fan functioning under the first heating
stage of the thermostat.
Operation on emergency heat
When the thermostat operation mode is in the emergency
heat position.
- Compressor will be in lockout.
- The supplementary and emergency electric heaters, if
installed, will be controlled by the first stage of the thermo-
stat.
Other safety features of the electric circuit
- The compressor is protected against overheating and the
failure of a phase by a solid state protector with three
sensors embedded in the windings.
- The control circuit is protected by a fuse.
- In general all the casing and components are protected by
an earth circuit.
Compressor crankcase oil heater
The compressor is equipped with an electric heater in the
crankcase, which heats the oil to prevent an excessive
concentration of refrigerant in it during the periods when it
does not operate.
If the main disconnect switch has been off for some time,
before heat pump is started switch should have been on for
at least 8 hours.
This is necessary to drive out any refrigerant that may be
accumulated inside the compressor.
Before finalising the installation
Verify that:
- The voltage is always between 198-
254 V or 342-436 V.
- The gauge of the supply cable is at
least that which is recommended in
the corresponding electrical dia-
grams.
- Instructions have been given to the
users on how to operate the system.
- The condensation drainage is
perfectlyassembledand theirareno
leaks in the water circuit.
- The need to clean the air filter has
been communicated.
- The guarantee split has been filled
in.
- Maintenanceinstructionshavebeen
given or a contract has been made
for periodic servicing.