Trane MCD/MWD-512 User manual

Installation
Operation
Maintenance
MCD/MWD
512-518-524-530-536-048-060
Ductable ceiling-suspended unit
SS-SVX07B-E4

About the unit
MCD/MWD units are assembled,
pressure tested, dehydrated, charged
and run tested before shipment.
MCD units are designed to operate
in cooling mode only, whereas MWD
can operate in cooling or heating
modes. This unit with its mounted
accessories is in conformity with the
provisions of the low voltage
directive 73/23/EEC and
electromagnetic compatibility
directive 89/336/EEC as amended,
and in conformity with nation
implementing legislation.
Reception
On arrival, inspect the unit before
signing the delivery note. Specify
any damage on the delivery note,
and send a registered letter of
protest to the last carrier of the
goods within 72 hours of delivery.
Notify the local sales office at the
same time. The unit should be totally
inspected within 7 days of delivery.
If any concealed damage is
discovered, send a registered letter
of protest to the carrier within 7 days
of delivery and notify the local sales
office. Units are shipped with the
refrigerant operating or holding
charge and should be examined with
an electronic leak detector to
determine the hermetic integrity of
the unit. The refrigerant charge is not
included in the standard Warranty
Cover.
Refrigerant
The refrigerant provided by the
constructor meets all the
requirements of our units. When
using recycled or reprocessed
refrigerant, it is advisable to ensure
its quality is equivalent to that of a
new refrigerant. For this, it is
necessary to have a precise analysis
made by a specialized laboratory. If
this condition is not respected, the
constructor warranty could be
cancelled. Do not release refrigerant
into the atmosphere.
Foreword
These Installation Operation and
Maintenance instructions are given
as a guide to good practice in the
installation, start-up, operation and
periodic maintenance by the user of
MCD/MWD. They do not contain the
full service procedures necessary for
the continued successful operation
of this equipment. The services of a
qualified service technician should
be employed, through the medium
of a maintenance contract with a
reputable service company.
Warranty
Warranty is based on the general
terms and conditions of the
constructor. The warranty is void if
the equipment is modified or
repaired without the written
approval of the constructor, if the
operating limits are exceeded, or if
the control system or the electrical
wiring is modified. Damage due to
misuse, lack of maintenance, or
failure to comply with the
manufacturer's instructions, is not
covered by the warranty obligation.
If the user does not conform to the
rules of chapter "Maintenance", it
may entail cancellation of warranty
and liabilities by the constructor.
About this manual
The information contained in this
manual applies to units designated
MCD/MWD. Cautions appear at
appropriate places in this instruction
manual. Your personal safety and the
proper operation of this machine
require that you follow them
carefully. The constructor assumes
no liability for installations or
servicing performed by unqualified
personnel. Read this manual
carefully and the manual on the
installation of the outdoor unit
before starting to install the system.
© 2008Trane SS-SVX07B-E4
General information

SS-SVX07B-E4 3
Contents
General information
2droweroF
2ytnarraW
2noitamrofnilareneG
2noitpeceR
2tnaregirfeR
Installation
4gnitratserofeB
5atadlareneG
31stimilgnitarepO
41gniriwlortnocdnarewoP
51noitisopnoitallatsnifoeciohC
61snoitcennoctnaregirfeR
81snoitcennocetasnednoC
81snoitcennoclacirtcelE
91stcudehtgnitcennoC
91gniretliF
91rellortnocderiwehtgnillatsnI
Operation
02muucavagnitaerC
02egrahctnaregirferlanoitiddA
12deepsnaF
12noitarepodnanoitarugifnoC
12naicinhcetdeifilauqaybpu-tratserofeB
12noitarepohctiwsycnegremednayalpsidtinU
12noitareporellortnocderiW
12noitareporellortnocsseleriW
Maintenance
32ecnanetniamcidoireP
42gnitoohselbuorT
62gnitoohselbuortrellortnoC
82snoitadnemmocerytefaS
82tcartnocecnanetniaM
82gniniarT

4SS-SVX07B-E4
Before starting
Creation of refrigerant lines
To create the refrigerant lines you
will need refrigeration quality
annealed copper tubing. These tubes
are available on the local market
together with the insulation and
mounting equipment. These units
must be connected using screw
connections/flare type for unit sizes
512 to 536 and brazed connections
for unit sizes 048-060.
Electrical connections
Use insulated copper wire. The
section of the core varies depending
on the length required. Refer to
table 1 for the recommended
sections. The wiring and electrical
connections must comply with
national electricity regulations.
Check that the electrical
characteristics on the nameplate
correspond to those of the national
grid. The electrical installation shall
include a disconnect switch in
compliance with local electrical
regulations.
WARNING!
Never open the indoor or outdoor
unit without first disconnecting the
power supply. There is a risk of
electrocution.
Table 1 - Recommended sections of
electric wires (power link)
Unit size Section Maximum fuse size
512 2.5 mm² 16 aM
518 - 524 2.5 mm² 32 aM
530 - 536 RB/SB 4.0 mm² 40 aM
530 - 536 RB/SB 2.5 mm² 32 aM
048 - 060 2.5 mm² 32 aM
Figure 1 - Unit description
1 = Direct expansion coil
2 = Fan assembly
3 = Control panel
4 = Cooling mode expansion device
(sizes 530-060)
5 = Refrigerant connections
(screw connections/flare type for unit sizes
512 to 536 and brazed connections for unit
sizes 048-060)
▲
1
2
3
5
4
Installation

SS-SVX07B-E4 5
Installation
General data
Table 2 - Cooling only R407C (1/2)
Performances TTK 512 RB TTK 518 RB TTK 524 RB TTK 530 SB TTK 530 SC
Indoor unit MCD 512 CB MCD 518 CB MCD 524 CB MCD 530 CB MCD 530 CB
Cooling Capacity (1) (kW) 3.16 4.56 6.76 8.60 8.60
Power Input (kW) 1.27 1.88 2.87 3.41 3.41
Main Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50 400/3/50
Sound Power Level in high speed (dB(A)) 36 43 40 44 44
Units Amps
Current (A) 6.4 9.6 12.8 19.8 7.7
Starting Amps (A) 28.7 44.0 72.0 97.0 45.5
Recommended Fuse size (AM) type gG 16 20 20 25 20
Recommended Power Wire nb wires x mm23 x 1.5 3 x 2.5 3 x 2.5 3 x 4 4 x 2.5
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5
Max wire length (2) (m) 50 50 50 50 50
Compressor
Number 11111
Type Rotary Rotary Rotary Scroll Scroll
Model RE 207 VHSMT PE 31 VNEMT NE 41 VNHMT ZR 40 K3E PFJ ZR 40 K3E TFD
Number of speeds 11111
Number of motors 11111
Maximum Continuous Current (A) 6.0 9.0 12.2 18.7 6.6
Locked Rotor Amps (A) 28 43 71 100 46
Motor RPM (rpm) 2850 2900 2900 2900 2900
Crankcase Heater (W) - - - - -
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 9.52 9.52 9.52 9.52 9.52
Tube Type Inner Groove Inner Groove Inner Groove Inner Groove Inner Groove
Height (mm) 508 559 559 762 762
Length (mm) 420 755 755 855 855
Face Area (m2) 0.213 0.420 0.420 0.650 0.650
Number of rows 22222
Number of circuits 12244
Fins per feet (fpf) 180 180 180 180 180
Outdoor Fan
Type Axial Axial Axial Axial Axial
Number 11111
Diameter mm (inches) 406(16) 457(18) 457(18) 508(20) 508(20))
Number of speeds 11111
Airflow (3) (4) (m3/h) 1050 2020 2020 3400 3400
Number of motors 11111
Motor (4) (kW) 0.08 0.14 0.14 0.229 0.229
Rated Amps (4) (A) 0.35 0.60 0.60 1.05 1.05
Locked rotor Amps (4) (A) 0.70 1.00 1.00 2.04 2.04
Motor RPM (rpm) 930 930 930 900 900
Capacitor per fan (µF) 2.5 2 2 5 5
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 550 820 1100 1370 1370
Expansion device
Cooling mode Orifice Orifice Orifice Orifice Orifice
Dimensions crated
Length (mm) 672 860 860 1045 1045
Width (mm) 357 340 340 380 380
Height (mm) 577 580 580 790 790
Dimensions uncrated
Length with feet (mm) 667 821 821 1100 1100
Length without feet (mm) 667 821 821 1003 1003
Width with feet (mm) 332 400 400 365 365
Width without feet (mm) 277 327 327 365 365
Height (mm) 517 567 567 790 790
Weight
Weight uncrated (kg) 36 54 58 87 87
Weight crated (kg) 37 56 60 89 89
Refrigerant Connections
Type Flare Flare Flare Flare Flare
Suction line (inches) 1/2 5/8 5/8 3/4 3/4
Liquid line (inches) 1/4 3/8 3/8 3/8 3/8
R407C Refrigerant Charge (kg) 1.1 1.6 2.2 2.5 2.5
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) Wire channel @ 35°C ambient max.
(3) at nominal airflow with standard drive
(4) for fan system

6SS-SVX07B-E4
Installation
Table 2 - Cooling only R407C (2/2)
Performances TTK 536 SB TTK 536 SC TTK 048 SC TTK 060 SC
Indoor unit MCD 536 CB MCD 536 CB MCD 048 CB MCD 060 CB
Cooling Capacity (1) (kW) 9.42 9.42 13.14 14.90
Power Input (kW) 4.35 4.35 5.25 6.37
Main Power supply (V/Ph/Hz) 230/1/50 400/3/50 400/3/50 400/3/50
Sound Power Level in high speed (dB(A)) 44 44 53 63
Units Amps
Current (A) 24.6 11.1 11.3 12.7
Starting Amps (A) 116.0 52.0 64.0 72.5
Recommended Fuse size (AM) type gG 40 20 20 20
Recommended Power Wire nb wires x mm23 x 6 4 x 2.5 4 x 2.5 4 x 2.5
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5
Max wire length (2) (m) 50 50 50 50
Compressor
Number 1111
Type Scroll Scroll Scroll Scroll
Model ZR 48 K3E PFJ ZR 48 K3E TFD ZR 61 KCE TFD ZR 72 KCE TFD
Number of speeds 1 1 1 1
Number of motors 1111
Maximum Continuous Current (A) 23.5 10.0 10.0 11.4
Locked Rotor Amps (A) 114 50 65.5 74
Motor RPM (rpm) 2900 2900 2900 2900
Crankcase Heater (W) - - - -
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 9.52 9.52 9.52 9.52
Tube Type Inner Groove Inner Groove Inner Groove Inner Groove
Height (mm) 762 762 1219 1219
Length (mm) 855 855 855 855
Face Area (m2) 0.650 0.650 1.048 1.048
Number of rows 2222
Number of circuits 4466
Fins per feet (fpf) 180 180 240 240
Outdoor Fan
Type Axial Axial Axial Axial
Number 1122
Diameter mm (inches) 508(20) 508(20) 457(18) 457(18)
Number of speeds 1111
Airflow (3) (4) (m3/h) 3400 3400 4600 4600
Number of motors 1122
Motor (4) (kW) 0.229 0.229 0.29 0.29
Rated Amps (4) (A) 1.05 1.05 1.20 1.20
Locked rotor Amps (4) (A) 2.04 2.04 2.00 2.00
Motor RPM (rpm) 900 900 930 930
Capacitor per fan (µF) 5 5 4 4
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 1650 1650 2190 2300
Expansion device
Cooling mode Orifice Orifice Orifice Orifice
Dimensions crated
Length (mm) 1045 1045 1045 1045
Width (mm) 380 380 390 390
Height (mm) 790 790 1389 1389
Dimensions uncrated
Length with feet (mm) 1100 1100 1030 1030
Length without feet (mm) 1003 1003 1030 1030
Width with feet (mm) 365 365 420 420
Width without feet (mm) 365 365 366 366
Height (mm) 790 790 1246 1246
Weight
Weight uncrated (kg) 89 89 105 108
Weight crated (kg) 91 91 108 111
Refrigerant Connections
Type Flare Flare Braze Braze
Suction line (inches) 3/4 3/4 1 1/8 1 1/8
Liquid line (inches) 3/8 3/8 3/8 3/8
R407C Refrigerant Charge (kg) 2.5 2.5 3.8 4.2
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) Wire channel @ 35°C ambient max.
(3) at nominal airflow with standard drive
(4) for fan system

SS-SVX07B-E4 7
Installation
Table 3 - Cooling only R22 (1/2)
Performances TTK 512 RB TTK 518 RB TTK 524 KB TTK 530 KB
Indoor unit MCD 512 DB MCD 518 DB MCD 524 DB MCD 530 DB
Cooling Capacity (1) (kW) 3.30 5.00 6.40 8.30
Power Input (kW) 1.51 1.62 2.70 3.30
Main Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50
Sound Power Level in high speed (dB(A)) 36 43 40 44
Units Amps
Current (A) 6.0 8.0 11.3 19.1
Starting Amps (A) 28.7 44.0 72.0 97.0
Recommended Fuse size (AM) type gG 16 20 20 25
Recommended Power Wire nb wires x mm23 x 1.5 3 x 2.5 3 x 2.5 3 x 4
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5
Max wire length (2) (m) 50 50 50 50
Compressor
Number 11 11
Type Rotary Rotary Rotary Reciprocating
Model RH207 VHAT PH31 VNET CK32K3-PFZ CR37KQ-PFT
Number of speeds 11 11
Number of motors 11 11
Maximum Continuous Current (A) 5.5 7.0 11.0 18.5
Locked Rotor Amps (A) 31 43 75 85.5
Motor RPM (rpm) 2850 2900 2900 2900
Crankcase Heater (W) - - - -
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 9.52 10.52 11.52 12.52
Tube Type Inner Groove Inner Groove Inner Groove Inner Groove
Height (mm) 508 559 559 762
Length (mm) 420 755 755 855
Face Area (m2) 0.213 0.420 0.420 0.650
Number of rows 22 22
Number of circuits 24 44
Fins per feet (fpf) 180 180 180 180
Outdoor Fan
Type Axial Axial Axial Axial
Number 11 11
Diameter mm (inches) 406(16) 457(18) 457(18) 508(20)
Number of speeds 11 11
Airflow (3) (4) (m3/h) 1050 2020 2020 3400
Number of motors 11 11
Motor (4) (kW) 0.08 0.14 0.14 0.23
Rated Amps (4) (A) 0.35 0.60 0.60 1.05
Locked rotor Amps (4) (A) 0.70 1.00 1.00 2.04
Motor RPM (rpm) 930 930 930 900
Capacitor per fan (µF) 2.5 2 2 5
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 550 820 1100 1370
Expansion device
Cooling mode Orifice Orifice Orifice Orifice
Dimensions crated
Length (mm) 672 860 860 1045
Width (mm) 357 340 340 380
Height (mm) 577 580 580 790
Dimensions uncrated
Length with feet (mm) 667 821 821 1100
Length without feet (mm) 667 821 821 1003
Width with feet (mm) 332 400 400 365
Width without feet (mm) 277 327 327 365
Height (mm) 517 567 567 790
Weight
Weight uncrated (kg) 36 54 58 87
Weight crated (kg) 37 56 60 89
Refrigerant Connections
Type Flare Flare Flare Flare
Suction line (inches) 1/2 5/8 5/8 3/4
Liquid line (inches) 1/4 3/8 3/8 3/8
R22 Refrigerant Charge (kg) 1.2 1.9 2.5 3.6
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) Wire channel @ 35°C ambient max.
(3) at nominal airflow with standard drive
(4) for fan system

8SS-SVX07B-E4
Installation
Table 3 - Cooling only R22 (2/2)
Performances TTK 536 KB TTK 048 KC TTK 060 KC
Indoor unit MCD 536 DB MCD 048 DB MCD 060 DB
Cooling Capacity (1) (kW) 9.90 13.50 15.80
Power Input (kW) 4.20 5.10 5.90
Main Power supply (V/Ph/Hz) 230/1/50 400/3/50 400/3/50
Sound Power Level in high speed (dB(A)) 44 53 63
Units Amps
Current (A) 21.9 9.0 10.6
Starting Amps (A) 116.0 64.0 72.5
Recommended Fuse size (AM) type gG 40 20 20
Recommended Power Wire nb wires x mm23 x 6 4 x 2.5 4 x 2.5
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5
Max wire length (2) (m) 50 50 50
Compressor
Number 111
Type Reciprocating Reciprocating Reciprocating
Model CR47KQ-PFZ CRPQ-0450-TFD CRNQ-0500-TFD
Number of speeds 111
Number of motors 111
Maximum Continuous Current (A) 21.0 8.0 10.0
Locked Rotor Amps (A) 105 55 65
Motor RPM (rpm) 2900 2900 2900
Crankcase Heater (W) - 27 27
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 13.52 14.52 15.52
Tube Type Inner Groove Inner Groove Inner Groove
Height (mm) 762 1219 1219
Length (mm) 855 855 855
Face Area (m2) 0.650 1.048 1.048
Number of rows 222
Number of circuits 466
Fins per feet (fpf) 180 240 240
Outdoor Fan
Type Axial Axial Axial
Number 122
Diameter mm (inches) 508(20) 457(18) 457(18)
Number of speeds 111
Airflow (3) (4) (m3/h) 3400 4600 4600
Number of motors 122
Motor (4) (kW) 0.23 0.29 0.29
Rated Amps (4) (A) 1.05 1.20 1.20
Locked rotor Amps (4) (A) 2.04 2.00 2.00
Motor RPM (rpm) 900 930 930
Capacitor per fan (µF) 5 4 4
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 1650 2190 2300
Expansion device
Cooling mode Orifice TXV TXV
Dimensions crated
Length (mm) 1045 1045 1045
Width (mm) 380 390 390
Height (mm) 790 1389 1389
Dimensions uncrated
Length with feet (mm) 1100 1030 1030
Length without feet (mm) 1003 1030 1030
Width with feet (mm) 365 420 420
Width without feet (mm) 365 366 366
Height (mm) 790 1246 1246
Weight
Weight uncrated (kg) 89 105 108
Weight crated (kg) 91 108 111
Refrigerant Connections
Type Flare Flare Flare
Suction line (inches) 3/4 1 1/8 1 1/8
Liquid line (inches) 3/8 3/8 3/8
R22 Refrigerant Charge (kg) 3.8 3.5 4.5
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) Wire channel @ 35°C ambient max.
(3) at nominal airflow with standard drive
(4) for fan system

SS-SVX07B-E4 9
Installation
Table 4 - Heat pump R407C (1/2)
Performances TWK 512 RB TWK 518 RB TWK 524 RB TWK 530 SB TWK 530 SC
Indoor unit MWD 512 CB MWD 518 CB MWD 524 CB MWD 530 CB MWD 530 CB
Cooling Capacity (1) (kW) 2.97 4.28 6.08 7.95 7.95
Cooling mode power input (kW) 1.46 1.54 2.60 3.26 3.26
Heating Capacity (2) (kW) 3.40 4.61 6.78 8.82 8.82
Heating mode power input (kW) 1.16 1.30 2.13 2.83 2.83
Main Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50 400/3/50
Sound Power Level in high speed (dB(A)) 36 43 40 44 44
Units Amps
Current (A) 6.4 9.6 12.8 19.8 7.7
Starting Amps (A) 28.7 44.0 72.0 97.0 45.5
Recommended Fuse size(AM) type gG 16 20 20 25 20
Recommended Power Wire nb wires x mm23 x 1.5 3 x 2.5 3 x 2.5 3 x 4 4 x 2.5
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5
Max wire length (3) (m) 50 50 50 50 50
Compressor
Number 11 111
Type Rotary Rotary Rotary Scroll Scroll
Model RE 207 VHSMT PE 31 VNEMT NE 41 VNHMT ZR 40 K3E PFJ ZR 40 K3E TFD
Number of speeds 11 111
Number of motors 11 111
Maximum Continuous Current (A) 6.0 9.0 12.2 18.7 6.6
Locked Rotor Amps (A) 28.0 43.0 71.0 100.0 46.0
Motor RPM (rpm) 2850 2900 2900 2900 2900
Crankcase Heater (W) - - - - -
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 9.52 9.52 9.52 9.52 9.52
Tube Type Inner Groove Inner Groove Inner Groove Inner Groove Inner Groove
Height (mm) 508 559 610 762 762
Length (mm) 420 755 855 855 855
Face Area (m2) 0.213 0.420 0.521 0.650 0.650
Number of rows 22 222
Number of circuits 24 233
Fins per feet (fpf) 180 180 240 180 180
Outdoor Fan
Type Axial Axial Axial Axial Axial
Number 11 111
Diameter mm (inches) 406(16) 457(18) 457(18) 508(20) 508(20)
Number of speeds 11 111
Airflow (4) (5) (m3/h) 1050 2020 2020 3400 3400
Number of motors 11 111
Motor (5) (kW) 0.08 0.14 0.14 0.229 0.229
Rated Amps (5) (A) 0.35 0.60 0.60 1.05 1.05
Locked rotor Amps (5) (A) 0.70 1.00 1.00 2.04 2.04
Motor RPM (rpm) 930 930 930 900 900
Capacitor per fan (µF) 2.5 2 2 5 5
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 550 820 1100 1370 1370
Expansion device
Cooling mode Orifice Orifice Orifice Orifice Orifice
Dimensions crated
Length (mm) 672 860 1045 1045 1045
Width (mm) 357 340 390 380 380
Height (mm) 577 580 695 790 790
Dimensions uncrated
Length with feet (mm) 667 821 1030 1100 1100
Length without feet (mm) 667 821 1030 1003 1003
Width with feet (mm) 332 400 420 365 365
Width without feet (mm) 277 327 366 365 365
Height (mm) 517 567 623 790 790
Weight
Weight uncrated (kg) 36 54 58 87 87
Weight crated (kg) 37 56 60 89 89
Refrigerant Connections
Type Flare Flare Flare Flare Flare
Suction line (inches) 1/2 5/8 5/8 3/4 3/4
Liquid line (inches) 1/4 3/8 3/8 3/8 3/8
R407C Refrigerant Charge (kg) 1.0 1.7 2.3 2.4 2.4
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) at 7°C db /6°C wb outdoor and 20°C indoor
(3) Wire channel @ 35°C ambient max.
(4) at nominal airflow with standard drive
(5) for fan system

10 SS-SVX07B-E4
Installation
Table 4 - Heat pump R407C (2/2)
Performances TWK 536 SB TWK 536 SC TWK 048 SC TWK 060 SC
Indoor unit MWD 536 CB MWD 536 CB MWD 048 CB MWD 060 CB
Cooling Capacity (1) (kW) 9.05 9.05 11.00 12.40
Cooling mode power input (kW) 3.99 3.99 4.86 5.73
Heating Capacity (2) (kW) 11.20 11.20 13.70 15.30
Heating mode power input (kW) 3.56 3.56 4.38 4.91
Main Power supply (V/Ph/Hz) 230/1/50 400/3/50 400/3/50 400/3/50
Sound Power Level in high speed (dB(A)) 44 44 53 63
Units Amps
Current (A) 6.24.6 11.1 11.3 12.7
Starting Amps (A) 116.0 52.0 64.0 72.5
Recommended Fuse size (AM) type gG 40 20 20 20
Recommended Power Wire nb wires x mm23 x 6 4 x 2.5 4 x 2.5 4 x 2.5
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5
Max wire length (3) (m) 50 50 50 50
Compressor
Number 1111
Type Scroll Scroll Scroll Scroll
Model ZR 48 K3E PFJ ZR 48 K3E TFD ZR 61 KCE TFD ZR 72 KCE TFD
Number of speeds 1111
Number of motors 1111
Maximum Continuous Current (A) 23.5 10.0 10.0 11.4
Locked Rotor Amps (A) 114.0 50.0 65.5 74.0
Motor RPM (rpm) 2900 2900 2900 2900
Crankcase Heater (W) - - - -
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 9.52 9.52 9.52 9.52
Tube Type Inner Groove Inner Groove Inner Groove Inner Groove
Height (mm) 762 762 1219 1219
Length (mm) 855 855 855 855
Face Area (m2) 0.650 0.650 1.048 1.048
Number of rows 2222
Number of circuits 2244
Fins per feet (fpf) 180 180 240 240
Outdoor Fan
Type Axial Axial Axial Axial
Number 1122
Diameter mm (inches) 508(20) 508(20) 457(18) 457(18)
Number of speeds 1111
Airflow (4) (5) (m3/h) 3400 3400 4600 4600
Number of motors 1122
Motor (5) (kW) 0.229 0.229 0.29 0.29
Rated Amps (5) (A) 1.05 1.05 1.20 1.20
Locked rotor Amps (5) (A) 2.04 2.04 2.00 2.00
Motor RPM (rpm) 900 900 930 930
Capacitor per fan (µF) 5 5 4 4
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 1650 1650 2190 2300
Expansion device
Cooling mode Orifice Orifice Orifice Orifice
Dimensions crated
Length (mm) 1045 1045 1045 1045
Width (mm) 380 380 390 390
Height (mm) 790 790 1389 1389
Dimensions uncrated
Length with feet (mm) 1100 1100 1030 1030
Length without feet (mm) 1003 1003 1030 1030
Width with feet (mm) 365 365 420 420
Width without feet (mm) 365 365 366 366
Height (mm) 790 790 1246 1246
Weight
Weight uncrated (kg) 89 89 105 108
Weight crated (kg) 91 91 108 111
Refrigerant Connections
Type Flare Flare Braze Braze
Suction line (inches) 3/4 3/4 1 1/8 1 1/8
Liquid line (inches) 3/8 3/8 3/8 3/8
R407C Refrigerant Charge (kg) 2.6 2.6 3.3 3.75
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) at 7°C db /6°C wb outdoor and 20°C indoor
(3) Wire channel @ 35°C ambient max.
(4) at nominal airflow with standard drive
(5) for fan system

SS-SVX07B-E4 11
Installation
Table 5 - Heat pump R22 (1/2)
Performances TWK 512 RB TWK 518 RB TWK 524 KB TWK 530 KB
Indoor unit MWD 512 DB MWD 518 DB MWD 524 DB MWD 530 DB
Cooling Capacity (1) (kW) 3.30 5.00 6.40 8.30
Cooling mode power input (kW) 1.51 1.62 2.70 3.30
Heating Capacity (2) (kW) 3.50 5.90 7.50 9.30
Heating mode power input (kW) 1.20 1.35 2.21 2.92
Main Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50
Sound Power Level in high speed (dB(A)) 36 43 40 44
Units Amps
Current (A) 6.0 8.0 11.3 19.1
Starting Amps (A) 28.7 44.0 72.0 97.0
Recommended Fuse size (AM) type gG 16 20 20 25
Recommended Power Wire nb wires x mm23 x 1.5 3 x 2.5 3 x 2.5 3 x 4
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5 2 x 1.5
Max wire length (2) (m) 50 50 50 50
Compressor
Number 11 11
Type Rotary Rotary Rotary Reciprocating
Model RH207 VHAT PH31 VNET CK32K3-PFZ CR37KQ-PFT
Number of speeds 11 11
Number of motors 11 11
Maximum Continuous Current (A) 5.5 7.0 11.0 18.5
Locked Rotor Amps (A) 31.0 43.0 75.0 85.5
Motor RPM (rpm) 2850 2900 2900 2900
Crankcase Heater (W) - - - -
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 9.52 10.52 11.52 12.52
Tube Type Inner Groove Inner Groove Inner Groove Inner Groove
Height (mm) 508 559 559 762
Length (mm) 420 755 755 855
Face Area (m2) 0.213 0.420 0.420 0.650
Number of rows 22 22
Number of circuits 24 44
Fins per feet (fpf) 180 180 180 180
Outdoor Fan
Type Axial Axial Axial Axial
Number 11 11
Diameter mm (inches) 406(16) 457(18) 457(18) 508(20)
Number of speeds 11 11
Airflow (3) (4) (m3/h) 1050 2020 2020 3400
Number of motors 11 11
Motor (4) (kW) 0.08 0.14 0.14 0.23
Rated Amps (4) (A) 0.35 0.60 0.60 1.05
Locked rotor Amps (4) (A) 0.7 1 1 2.04
Motor RPM (rpm) 930 930 930 900
Capacitor per fan (µF) 2.5 2 2 5
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 550 820 1100 1370
Expansion device
Cooling mode Orifice Orifice Orifice Orifice
Dimensions crated
Length (mm) 672 860 860 1045
Width (mm) 357 340 340 380
Height (mm) 577 580 580 790
Dimensions uncrated
Length with feet (mm) 667 821 821 1100
Length without feet (mm) 667 821 821 1003
Width with feet (mm) 332 400 400 365
Width without feet (mm) 277 327 327 365
Height (mm) 517 567 567 790
Weight
Weight uncrated (kg) 36 54 58 87
Weight crated (kg) 37 56 60 89
Refrigerant Connections
Type Flare Flare Flare Flare
Suction line (inches) 1/2 5/8 5/8 3/4
Liquid line (inches) 1/4 3/8 3/8 3/8
R22 Refrigerant Charge (kg) 1.2 1.4 1.7 2.4
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) at 7°C db /6°C wb outdoor and 20°C indoor
(3) Wire channel @ 35°C ambient max.
(4) at nominal airflow with standard drive
(5) for fan system

Installation
12 SS-SVX07B-E4
Table 5 - Heat pump R22 (2/2)
Performances TWK 536 KB TWK 048 KC TWK 060 KC
Indoor unit MWD 536 DB MWD 048 DB MWD 060 DB
Cooling Capacity (1) (kW) 9.90 13.50 15.80
Cooling mode power input (kW) 4.2 5.10 5.90
Heating Capacity (2) (kW) 11.10 15.10 17.70
Heating mode power input (kW) 3.66 4.45 5.20
Main Power supply (V/Ph/Hz) 230/1/50 400/3/50 400/3/50
Sound Power Level in high speed (dB(A)) 44 53 63
Units Amps
Current (A) 21.9 9.0 10.6
Starting Amps (A) 116.0 64.0 72.5
Recommended Fuse size (AM) type gG 40 20 20
Recommended Power Wire nb wires x mm23 x 6 4 x 2.5 4 x 2.5
Recommended Control Interconnection Wire nb wires x mm22 x 1.5 2 x 1.5 2 x 1.5
Max wire length (2) (m) 50 50 50
Compressor
Number 111
Type Reciprocating Reciprocating Reciprocating
Model CR47KQ-PFZ CRPQ-0450-TFD CRNQ-0500-TFD
Number of speeds 111
Number of motors 111
Maximum Continuous Current (A) 21.0 8.0 10.0
Locked Rotor Amps (A) 105.0 55.0 65.0
Motor RPM (rpm) 2900 2900 2900
Crankcase Heater (W) - 27 27
Outdoor Coil
Fin Type Wavy 3B Wavy 3B Wavy 3B
Tube size (mm) 13.52 14.52 15.52
Tube Type Inner Groove Inner Groove Inner Groove
Height (mm) 762 1219 1219
Length (mm) 855 855 855
Face Area (m2) 0.650 1.048 1.048
Number of rows 222
Number of circuits 466
Fins per feet (fpf) 180 240 240
Outdoor Fan
Type Axial Axial Axial
Number 122
Diameter mm (inches) 508(20) 457(18) 457(18)
Number of speeds 111
Airflow (3) (4) (m3/h) 3400 4600 4600
Number of motors 122
Motor (4) (kW) 0.23 0.29 0.29
Rated Amps (4) (A) 1.05 1.20 1.20
Locked rotor Amps (4) (A) 2.04 2 2
Motor RPM (rpm) 900 930 930
Capacitor per fan (µF) 5 4 4
Power supply (V/Ph/Hz) 230/1/50 230/1/50 230/1/50
Indoor Fan
Airflow (3) (4) (m3/h) 1650 2190 2300
Expansion device
Cooling mode Orifice TXV TXV
Dimensions crated
Length (mm) 1045 1045 1045
Width (mm) 380 390 390
Height (mm) 790 1389 1389
Dimensions uncrated
Length with feet (mm) 1100 1030 1030
Length without feet (mm) 1003 1030 1030
Width with feet (mm) 365 420 420
Width without feet (mm) 365 366 366
Height (mm) 790 1246 1246
Weight
Weight uncrated (kg) 89 105 108
Weight crated (kg) 91 108 111
Refrigerant Connections
Type Flare Flare Flare
Suction line (inches) 3/4 1 1/8 1 1/8
Liquid line (inches) 3/8 3/8 3/8
R22 Refrigerant Charge (kg) 2.6 3.5 4.5
Notes:
(1) at 27°C db /19°C wb indoor and 35°C outdoor
(2) at 7°C db /6°C wb outdoor and 20°C indoor
(3) Wire channel @ 35°C ambient max.
(4) at nominal airflow with standard drive
(5) for fan system

SS-SVX07B-E4 13
Installation
Table 6 - Unit dimensions (inch/mm)
ABCDEFGH
MCD/MWD 512 23 (578) 12 (305) 38.5 (980) 31.6 ( 803) 6.7 (170) 3.3 (87) 8.3 (210) 4.3 (110)
MCD/MWD 518 23 (578) 12 (305) 38.5 ( 980) 31.6 ( 803) 6.7 (170) 3.3 (87) 8.3 (210) 4.3 (110)
MCD/MWD 524 23 (578) 12 (305) 42.9 ( 1090) 36.1 (920) 6.7 (170) 3.3 (87) 8.3 (210) 4.3 (110)
MCD/MWD 530 23 (578) 12 (305) 48.3 ( 1228) 42.1 (1069) 6.7 (170) 3.3 (87) 8.3 (210) 4.3 (110)
MCD/MWD 536 23 (578) 12 (305) 48.3 ( 1228) 42.1 (1069) 6.7 (170) 3.3 (87) 8.3 (210) 4.3 (110)
MCD/MWD 048 27.7 (703) 15.4 ( 395) 43 ( 1091) 36 (920) 13.3 (337) 4.2 (110) 12.2 (310) 8.1 (205)
MCD/MWD 060 27.7 (703) 15.4 ( 395) 49 ( 1245) 42.1 (1070) 13.3 (337) 4.2 (110) 12.2 (310) 8.1 (205)
Dimensions
Figure 2 - Unit dimensions

14 SS-SVX07B-E4
Installation
Power and control wiring
Table 7 - Control interconnection
Outdoor unit Number of wires x section area (mm²)
Including ground wire
TTK 512 3 x 2.5
TTK 518 2 x 1.5
TTK 524 2 x 1.5
TTK 530 2 x 1.5
TTK 536 2 x 1.5
TTK 048 2 x 1.5
TTK 060 2 x 1.5
TWK 512 5 x 1.5
TWK 518 5 x 1.5
TWK 524 5 x 1.5
TWK 530 6 x 1.5
TWK 536 6 x 1.5
TWK 048 6 x 1.5
TWK 060 6 x 1.5
Table 8 - Power supply outdoor unit (1)
Number of wires x section area (mm²)
Including ground wire
TTK/TWK 512 -
TTK/TWK 518 3 x 2.5
TTK/TWK 524 3 x 2.5
TTK/TWK 530 4 x 2.5
TTK/TWK 536 4 x 2.5
TTK/TWK 048 4 x 2.5
TTK/TWK 060 4 x 2.5
(1) Indoor and outdoor units are powered separately
(2) Number of wires and section area are given for a
maximum wire length of 50m. If the wire is longer
than 50m, these must be recalculated.
Table 9 - Power supply indoor unit (1)
Without electric heater With electric heater
Number of wires x section area (mm²) Number of wires x section area (mm²)
MCD/MWD 512 3 x 1.5 3 x 2.5 / 3 x 4
MCD/MWD 518 3 x 1.5 3 x 4
MCD/MWD 524 3 x 1.5 3 x 4
MCD/MWD 530 3 x 1.5 4 x 4
MCD/MWD 536 3 x 1.5 4 x 4
MCD/MWD 048 3 x 1.5 4 x 4
MCD/MWD 060 3 x 1.5 4 x 4
(1) Indoor and outdoor units are powered separately
(2) Number of wires and section area are given for a
maximum wire length of 50m. If the wire is longer
than 50m, these must be recalculated.

SS-SVX07B-E4 15
Installation
Table 10 - Recommended piping R407C/R22
D3 D2 D1 Line diameter (inches)
Outdoor unit Indoor unit (m) (m) (m) Gas Liquid
TTK/TWK 512 MCD/MWD 512 20 12 15 1/2 1/4
TTK/TWK 518 MCD/MWD 518 24 18 24 5/8 3/8
TTK/TWK 524 MCD/MWD 524 24 18 24 5/8 3/8
TTK/TWK 530 MCD/MWD 530 12 12 12 5/8 3/8
40 18 24 7/8
TTK/TWK 536 MCD/MWD 536 18 18 18 3/4 3/8
40 24 7/8
TTK/TWK 048 MCD/MWD 048 24 18 24 7/8 3/8
40 1 1/8
TTK/TWK 060 MCD/MWD 060 18 12 18 7/8 3/8
40 18 24 1 1/8 1/2
Choice of installation
position
To ensure correct installation, the
following points must be
considered.
- The ceiling must be strong enough
to support the weight of the unit.
- Choose a place where it will be
easy to comply with the
recommended clearances, taking
into account the additional space
required due to external
accessories.
- Take into consideration the drilling
of the holes in the walls to connect
the unit.
- Make sure the maximum distances
between the two units are not
exceeded. See Figure 3 and
Table 10.
Figure 3- Recommended clearances and
maximum lengths used between two
units
Preparing the ceiling and installing
the unit
Drill holes in the ceiling to fix the
threaded rods according to the
dimensions given the Dimensions
section. The angle brackets can also
be used to space the drill holes.
Access is necessary on the
refrigerant connection side to
facilitate installation, maintenance
and access to the cabinet.
Four 8 mm diameter threaded rods
must be securely fixed into the
ceiling. Introduce the other end of
the rods through the slots of the unit
suspension brackets. Position the
shock absorbers, add washers and
screw the nuts down until the unit is
correctly supported. The unit must
be perfectly level in both directions
to ensure correct evacuation of the
condensates. If there is enough
space, a rubber or neoprene sheet
can be placed between the ceiling
and the unit.

16 SS-SVX07B-E4
Installation
Refrigerant connections
It is possible to remove the electrical
cabinet to facilitate access to the
refrigerant connection.
Installation procedure
- Make sure the route taken by your
refrigerant lines is as short as
possible.
- Limit pressure losses in the lines
which may be caused by crushing
of the lines, a large number of
bends or bending radii that are too
small.
- Slope all the gas lines leaving the
indoor unit so that oil can return to
the compressor by gravity.
· Prevent any possibility of oil
trapped in the gas lines.
CAUTION!
An insufficiently lubricated
compressor may break down.
If the vertical difference in level
between the units is greater than
2.5 m, an oil trap must be positioned
at the bottom of the vertical line, and
an additional trap must be
positioned every 7.5 m of vertical
elevation to allow oil return to the
compressor. There are no special
technical recommendations for
liquid lines because of the well-
balanced mixture of refrigerant and
oil. Movement of the liquid
refrigerant also causes the oil to
move.
Passage of the tube and cable
bundle
Before drilling into the wall
- make sure there are no pipes or
electrical cables in the wall at the
place where you are going to drill
provide a protective sleeve for the
bundle of tubes and cables at the
point where it passes through the
hole (Figure 4). If permitted by
legislation, the condensate
drainage line can also be included
in the bundle. Wrap tape around
all the lines and cables from the
bottom of the outside unit to the
point where the piping enters the
wall. Carry out the same operation
for each circuit.
Figure 4 - Protective sleeve
A = Cable bundle
1 = Wall
2 = Inside
3 = Outside
A

SS-SVX07B-E4 17
Installation
Brazed connections
These lines will be created on the
installation site. They will be
installed according to normal trade
practice by qualified personnel, in
compliance with local legislation.
1. Remove the plugs from the units'
refrigerant connections just before
connecting the piping, when all
the connections on the refrigerant
lines have been terminated. This
will prevent contamination by
humidity. Remove the rubber
plugs from the ends of the tubes.
2.Use a clean dry copper tube for
refrigeration installations.
3.Use silver brazing alloy only. Do
not overheat the welds and carry
out nitrogen scavenging inside the
tubes to prevent oxidization during
brazing.
4.Once all the other connections
have been made, debraze or cut
the plug on the outdoor unit's
refrigerant line connections.
Proceed in the same way as for
brazing of the indoor unit's lines.
Line insulation
To prevent heat losses and
condensation, both liquid and gas
lines must be thoroughly insulated.
Unscrew the Flare nuts which are
placed on the beginnings of the
indoor unit lines. Put the Flare nut
onto the tube. Splay the tube.
Connect the refrigerant tubes to the
indoor unit. Tighten the Flare nuts
using the recommended tightening
torques in Table 11. Insufficient
tightening will cause refrigerant
leaks. Use flat wrenches only (see
Figure 6). Repeat the operation for
each circuit.
Figure 6 - Tightening flare nuts
Table 11 -Recommended tightening
torques
Line diameter Tightening torque (kg/cm)
1/4'' 150-200
3/8'' 350-400
1/2'' 500-550
5/8'' 600-650
3/4'' 700-750
Screw/flare connections
CAUTION!
When cutting, deburring and
splaying the tubes, keep the end of
the tube down to make sure that
copper waste does not fall into the
lines.
Cut the copper tube using a pipe-
cutter only (do not use a metalsaw).
Hold the tube downwards when
deburring it.
Figure 5 - Deburring recommendations

18 SS-SVX07B-E4
Installation
Condensate connections
The unit must be perfectly level in
both directions. Connect the indoor
unit's condensate tray to a
condensate drainage line. The unit is
equipped with a 20 mm diameter
smooth tube connection. To ensure
correct condensate flow, the
drainage tube must be given a
10° slope.There must not be a
condensate trap at any point in the
line. However, a trap can be
provided to prevent outside air from
being taken in by the indoor unit. If
the tube enters a room, insulate it to
prevent condensation damage.
Figure 7 - Condensate drainage
connections
Electrical connections
All the wiring and earthing
arrangements must comply with
local legislation.
WARNING!
Never open the indoor or outdoor
unit without first disconnecting the
power supply. There is a risk of
electrocution.
CAUTION!
1. Check the electrical characteristics
on the unit's nameplate. Make
sure the wiring complies with the
manufacturer's electrical diagram
and local legislation.
2. Connect the units using one or
more lines protected by an
electrical disconnect device.
3. Ground each unit.
4. The cables must not touch the
refrigerant lines, the motors or
other moving parts and metal
edges.
5. The manufacturer does not
assume any liability for problems
caused by modifications made to
the unit's internal wiring.
6. Tighten the terminals securely.
7. For the electrical connections,
refer to the interconnection
diagrams attached with the
machine.

SS-SVX07B-E4 19
Installation
Connecting the ducts
Units can be equipped with
rectangular discharge and/or intake
from the bottom or intake from the
back ducts.
WARNING!
The pressure loss in the network and
the accessories must not exceed the
unit's available static pressure given
in the selection data. The design and
installation shall be done by a
qualified technician and according to
local regulations.
Figure 8 - Discharge and intake duct
possibilities
A = Discharge
B = Intake from the bottom
C = Intake from the back
Table 12 - Duct connection dimensions
Unit size Length (mm) Height (mm)
512/518 748 198
524/530/536 948 248
048/060 1148 298
Filtering
Filtering the air is necessary to
ensure the unit's correct operation.
The unit is supplied with a filter.
Installing the wired
controller
Location
- Do not install thermostats near or
above a source of heat (i.e. direct
sunlight, hot lamps or radiator).
- Do not expose the controller to the
indoor unit discharge air stream.
- Do not place in a confined space.
Wiring
Electrical interconnection between
units must be in accordance with
national, state and local codes.
Units must be grounded. Refer to
the wiring diagrams that are shipped
with the unit.

20 SS-SVX07B-E4
Operation
Creating a vacuum
For this operation, use a pump
capable of creating a vacuum of
1 mm Hg (1.3mbar) or less. To create
the vacuum you must connect the
pump to the Schrader pressure
connection on service valve
A located on the outdoor unit (gas
line). To use the vacuum pump,
follow the pump manufacturer's
instructions. Create a vacuum up to
2 mm Hg (2.6mbar) or less. Once the
value of 2mm Hg or less has been
reached, an increase in pressure will
be observed after a certain time. The
maximum permissible increase is
1 mm Hg after 15 minutes. If the
increase is greater and remains at a
constant value, this means there is
too much humidity in the system.
In this case, break the vacuum using
dry nitrogen and start the vacuum
creation procedure again.
A continuous increase in pressure
means there is a leak in the system.
WARNING!
Valves A and B must not be opened
before the installation of the
refrigerant circuit has been
completely finished, or the
refrigerant charge will be lost.
Figure 9 - Refrigerant circuit
1 = Outdoor unit
2 = Vacuum pump
3 = Indoor unit
4 = Gas line
5 = Liquid line
6 = TTK/TWK cooling mode
Additional refrigerant
charge
Once the system has been vacuum
pumped and is in operation and if
the distance between the units is
greater than 6m, it may be
necessary to add an additional
charge. Table 13 indicates the
amounts of refrigerant to add per
additional meter of line. Once the
appropriate amount of refrigerant
has been added, fully open liquid
line valve and check the operating
pressure.
Figure 10 - Adding refrigerant charge
1 = Outdoor unit
2 = Gas line
3 = Indoor units
4 = Liquid line
5 = For sizes 512 to 524
6 = For sizes 530 to 060
A
R22 Refrigerant
While the unit is operating, charge
the unit with gas through the service
Schraeder valve located at the
compressor suction. R22 refrigerant
can also be added in liquid phase in
the liquid line: see method used for
R407C. Never add liquid in the
suction line of the compressor.
R407C Refrigerant
WARNING! add only R407C
refrigerant in liquid state. Never add
liquid in the suction line of the
compressor period. Use service
Schraeder valve located on the liquid
line to charge the unit. While the unit
is operating, close partially the
service valve in order to create a
lower pressure downstream the
service valve. Add the refrigerant
necessary. Control the added weight
with a scale.
Table 13 - Additional refrigerant charge
Liquid line Gas line Additional
R22/R407C charge (g)
1/4'' 1/2'' 26
5/16" 5/8" 36
3/8'' 5/8'' 60
3/8'' 3/4'' 60
3/8'' 7/8'' 63
3/8'' 1 1/8'' 68