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55908014-06
TECHNICAL MANUAL
CX(E) SPLIT SYSTEMS
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GENERAL
INDEX
CONTENTS PAGE
PART NUMBERS, OPTIONS, UNIT COMBINATIONS, DIMENSIONS & WEIGHTS 3
PERFORMANCE DATA & AIR FLOW 4
SOUND POWER AND SOUND PRESSURE LEVELS 5
ELECTRICAL DATA 6
CX(E)
DIMENSIONS 7
INSTALLATION: CONTENTS & PIPEWORK 8
ELECTRICAL: FUSES & WIRING DIAGRAMS 9
CKC
INSTALLATION: DIMENSIONS 10
PIPEWORK 11
ELECTRICAL 12
REFRIGERANT 13
CKR
INSTALLATION: DIMENSIONS 15
PIPEWORK 16
ELECTRICAL 18
REFRIGERANT 19
COMPONENT IDENTIFICATION
CX(E) UNITS 20
CKC UNITS 21
CKR 30 22
CKR
50 23
CKR
80 24
1. TEV Ltd recommend that personnel working on this equipment be skilled and fully conversant with
the appropriate Air Conditioning, Refrigeration and Electrical practices and have sound knowledge
of current Industrial Safe Working practices.
2. CX(E) models are electromechanical / Electronic control units that use R407C refrigerant; they
provide cooling within the range of 2.8 – 6.8 kW. These units are matched with CKC and CKR
outdoor units to complete a system.
CX(E) units are fitted with an expansion assembly, allowing the use of a liquid line. This can be
transferred to the outdoor unit (CKC only), when an expansion line is required to accommodate
longer pipe runs.
3. These units contain live electrical components, moving parts and refrigerant under pressure.
Always site out of reach of children and protect from vandalism.
4. The data plate only gives information for the CX(E) unit. For system details add input power and
current of indoor and outdoor unit, including any heater load.
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PART NUMBERS
MODEL
CX 30 CX 40 CX 50 CX 70
PART NUMBER
55900001 55900002 55900003 55900004
MODEL
CXE 30 CXE 40 CXE 50 CXE 70
PART NUMBER
55900017 55900016 55900015 55900014
MODEL
CKC 20 1ph CKC 30 1ph CKC 50 1ph CKC 80 1ph CKC 80 3ph
PART NUMBER
55023720 55023730 55023722 55023723 55023724
MODEL
CKR 30 1ph CKR 50 1ph CKR 80 1ph
PART NUMBER
56000001 56000002 56000003
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
CX(E) 30 CKC 20 CX(E) 30 CKR 30
CX(E) 40 CKC 30 CX(E) 50 CKR 50
CX(E) 50 CKC 50 CX(E) 70 CKR 80
CX(E) 70 CKC 80
OPTIONAL KITS
PART NUMBER DESCRIPTION
55900700 3kW heater (CX only)
55900701 Digital temperature display (CX only) std on CXE
55900702 De-ice thermostat (CX only)
55900709* Extended pipe run CX 30/40/50 only
55900710* Extended pipe run CX 70 only
55900715 3kW heater (CXE only)
* When matched with CKC outdoor units
MODEL UNPACKED
PACKED
CX(E) HEIGHT WIDTH DEPTH WEIGHT HEIGHT WIDTH DEPTH WEIGHT
30
483 845 320 18 530 950 370 21
40
483 845 320 20 530 950 370 23
50
483 845 320 20 530 950 370 23
70
483 845 320 23 530 950 370 26
WEIGHT WEIGHT
CKC HEIGHT WIDTH DEPTH
1Ph 3Ph
HEIGHT WIDTH DEPTH
1Ph 3Ph
20
560 900 300 46 - 625 980 340 48 -
30
560 900 300 53 - 625 980 340 55 -
50
560 1000 300 64 - 730 1080 340 66 -
80
560 1000 300 66 64 730 1080 340 68 66
CKR HEIGHT WIDTH DEPTH WEIGHT HEIGHT WIDTH DEPTH WEIGHT
30
525 795 255 39 580 940 330 41
50
585 850 295 48 680 990 410 50
80
680 870 310 62 680 990 415 64
CX(E) OPTIONS
DIMENSIONS & WEIGHTS
UNIT COMBINATIONS
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PERFORMANCE DATA (kW
)
RATING CONDITIONS
(ROOM 12.7°C / 10°C) (AMBIENT 27°C / 19°C)
OPTIONAL ELECTRIC
HEATER
MODEL
TOTAL SHR SENSIBLE 240V 230V
CX(E) 30 + CKC 20
2.80 0.75 2.10 3.25 3.0
CX(E) 40 + CKC 30
3.30 0.68 2.24 3.25 3.0
CX(E) 50 + CKC 50
4.60 0.66 3.02 3.25 3.0
CX(E) 70 + CKC 80
6.80 0.63 4.30 3.25 3.0
RATING CONDITIONS
(ROOM 12.7°C / 10°C) (AMBIENT 35°C / 19°C)
OPTIONAL ELECTRIC
HEATER
MODEL
TOTAL SHR SENSIBLE 240V 230V
CX(E) 30 + CKC 20
2.38 0.75 1.79 3.25 3.0
CX(E) 40 + CKC 30
2.81 0.68 1.90 3.25 3.0
CX(E) 50 + CKC 50
3.91 0.66 2.57 3.25 3.0
CX(E) 70 + CKC 80
5.78 0.63 3.66 3.25 3.0
RATING CONDITIONS
(ROOM 12.7°C / 10°C) (AMBIENT 27°C / 19°C)
OPTIONAL ELECTRIC
HEATER
MODEL
TOTAL SHR SENSIBLE 240V 230V
CX(E) 30 + CKR 30
3.0 0.77 2.30 3.25 3.0
CX(E) 50 + CKR 50
4.6 0.76 3.50 3.25 3.0
CX(E) 70 + CKR 80
5.7 0.67 3.80 3.25 3.0
RATING CONDITIONS
(ROOM 12.7°C / 10°C) (AMBIENT 35°C / 19°C)
OPTIONAL ELECTRIC
HEATER
MODEL
TOTAL SHR SENSIBLE 240V 230V
CX(E) 30 + CKR 30
2.55 0.77 1.96 3.25 3.0
CX(E) 50 + CKR 50
3.91 0.66 3.02 3.25 3.0
CX(E) 70 + CKR 80
4.85 0.66 3.23 3.25 3.0
AIR FLOWS
MODEL m³/s MODEL m³/s MODEL m³/s
CX(E) 30
0.61
CKC 20
0.81
CKR 30
0.56
CX(E) 40
0.61
CKC 30
0.81
CKR 50
0.60
CX(E) 50
0.66
CKC 50
0.78
CKR 80
1.01
CX(E) 70
0.58
CKC 80
0.78
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INDOOR UNIT
MAXIMUM SOUND POWER LEVELS
SPEED Frequency Hz
SOUND PRESSURE
LEVELS
125 250 500 1K 2K 4K dB
(A)
NC
CX(E) 30
69.1 67.7 67.6 65.6 62.2 56.0 55 48
CX(E) 40
69.1 67.7 67.6 65.6 62.2 56.0 55 48
CX(E) 50
71.7 69.2 69.1 67.1 63.2 58.5 56 50
CX(E) 70
70.1 68.2 68.6 66.1 63.2 57.5 56 49
Sound Power Levels were obtained in full accordance with the direct method of BS EN ISO3174:2000. Levels are shown in dB
with a standard reference of 1 pW.
Sound Pressure Levels in dB(A) refer to semi-hemispherical radiation (wall or ceiling mounted) at a distance of 1.5m from the
front of the unit, with the fan operating at full speed.
OUTDOOR UNIT
MAXIMUM SOUND POWER LEVELS
SPEED Frequency Hz
SOUND PRESSURE
LEVELS
125 250 500 1K 2K 4K dB
(A)
NC
CKC 20
77 67 69 65 60 54 49 44
CKC 30
77 68 69 65 60 54 50 44
CKC 50
74 68 67 66 61 54 49 44
CKC 80
71 69 68 65 60 54 49 43
MAXIMUM SOUND POWER LEVELS
SPEED Frequency Hz
SOUND PRESSURE
LEVELS
125 250 500 1K 2K 4K dB
(A)
NC
CKR 30
65.1 67.7 61.6 58.1 53.7 49 47 42
CKR 50
65.1 64.7 63.6 59.1 53.7 48 47 42
CKR 80
63.6 63.2 62.6 61.1 56.2 50 49 44
Sound Power Levels were obtained in full accordance with the direct method of ISO 3741: 1988. Levels are shown in dB with a
standard reference of 1 pW.
Sound Pressure Levels in dB(A) refer to semi-hemispherical radiation (wall or floor mounted) at a distance of 3m from the
front of the unit, with the fan operating at full speed; (add 3dBA or 3NC for units at an intersection of a wall, add 1dBA or 1NC
for high level wall mounted units).
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ELECTRICAL DATA
1 PH 230V 50Hz
INPUT POWER FULL LOADS AMPS
COOLING HEATING COOLING HEATING
SYSTEM
MAX.
STARTING
CURRENT
MODEL
INDOOR/OUTDOOR
kW kW AMPS AMPS AMPS
CX(E) 30 + CKC 20
1.3 2.9 7.7 13.8 30
CX(E) 40 + CKC 30
1.6 2.9 8.2 13.8 38
CX(E) 50 + CKC 50
2.2 2.9 9.7 13.8 60
CX(E) 70 + CKC 80
3.2 2.9 12.3 13.8 78
3 PH 400V 50Hz
INPUT POWER FULL LOADS AMPS
COOLING HEATING COOLING HEATING
SYSTEM
MAX.
STARTING
CURRENT
MODEL
INDOOR/OUTDOOR
kW kW
AMPS AMPS AMPS
CX(E) 70 + CKC 80
3.2 2.9 5.7 13.8 42
UNIT ELECTRICAL LOADS [230V 50Hz 1Ph (A) or 400V 50Hz 3Ph (A/Ph)]
MODEL FAN MOTOR HEATER
CX(E) 30
0.8 13.0
CX(E) 40
0.8 13.0
CX(E) 50
0.8 13.0
CX(E) 70
0.8 13.0
CKC 20 30 50 80
Fan motor
0.6 0.6 0.6 0.6
R407C compressor (1 Ph) nominal FLA
6.0 10.4 8.3 10.9
R407C compressor (3 Ph) nominal FLA
- - - 4.3
Crankcase heater
0.25 0.25 - -
CKR 30 50 80
Fan motor
0.8 0.8 0.8
R407C compressor (1 Ph) nominal FLA
5.1 7.8 9.2
1 PH 230V 50Hz
INPUT POWER FULL LOADS AMPS
COOLING HEATING COOLING HEATING
SYSTEM
MAX.
STARTING
CURRENT
MODEL
INDOOR/OUTDOOR
kW kW AMPS AMPS AMPS
CX(E) 30 + CKR 30
1.35 2.9 5.84 13.8 33
CX(E) 50 + CKR 50
2.0 2.9 8.39 13.8 46
CX(E) 70 + CKR 80
2.3 2.9 10.0 13.8 58
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(Wall mounted)
FRONT VIEW
(Wall mounted)
REAR VIEW
(Ceiling Mounted)
TOP VIEW
(Ceiling mounted)
SIDE VIEW
X
2Z
1Z
X
(Wall mounted)
SIDE VIEW
= Liquid / Expansion
2
Z
= Suction 1
Z
X = Interconnecting Wiring
20
483
FOR SIDE ACCESS
MIN. 500
96
320
120
888 (Fixing centers)
124
888
845
70
422.5
124 (Fixing centers)
39
39
60
17.5
17.5
MIN.
120
36
215
75
140
65 TYP.
35
96
CONDENSATE DRAIN 22mm OD
CX(E) DIMENSIONS
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CX(E) ELECTRICAL CONNECTIONS
CX(E) INSTALLTION
The unit may be mounted on a wall or solid ceiling using brackets supplied. It should be matched with the
appropriately sized outdoor unit; this instruction should be used in conjunction with the outdoor unit
installation instructions.
1. Fit all kits prior to installing the unit. (Heater kit is easier to fit when unit has been mounted).
2. Ensure that the mounting surface will support the operating weight of the unit (see table below).
3. Mark out the mounting positions and drill holes to suit 6mm rawlbolt shields or equivalent strength
fasteners (ensure that the unit is positioned
to give sufficient access (min 0.5m) to the
electrics access side).
4. Fix the mounting brackets to the unit in the
correct position for wall or ceiling mounting.
5. Raise the unit into position and secure the
fixings, ensuring that it is square and level.
6. Remove the drain tray then fit the drain
stub, nut & gasket (Fig.1). Refit the drain
tray.
Fig.1
CX(E) PIPEWORK
NITROGEN CHARGE
The unit contains a small charge of dry nitrogen, which should be discharged into the atmosphere. This is a
non-toxic, non-ozone depleting gas with no global warming potential.
PIPE CONNECTIONS
Pipework is terminated with 2 flare nuts & bonnets. Access is via the rear right hand side. Pipes exit the unit
through holes in the back panel.
INDOOR UNIT CX(E) 30 CX(E) 40 CX(E) 50 CX(E) 70
LIQUID / EXPANSION
3/8" 3/8" 3/8" 1/2"
SUCTION
1/2 " 1/2 " 1/2 " 5/8"
CONDENSATE DRAIN
Push fit connections are widely available for the 7/8” (22mm) OD condensate drain and 3/4"(19mm) ID drain
stub adaptor. Alternatively 7/8” (22mm) bore plastic tubing may be fitted directly to the stub/adaptor with a
hose clamp. Take care not to overtighten hose clamps as this could damage the stub pipe.
• Cables are routed to the terminal block via the cable cord grips at the rear of the unit and then through
the back of the electrics box (see page 2).
• Cables MUST be size compatible with the recommended system fuse.
CONTENTS
PARTS DESCRIPTION ACTION
Envelope containing operating instructions
and Declaration of Conformity
Pass to the end user.
Drain Stub/Nut/Gasket Fitted by installer.
Drain stub adaptor Convert to ¾" drain if required.
Mounting brackets plus fixings Use to hang unit.
0.037" restrictor (CX(E) 30 only) Use with CKR 30 outdoor unit
DRAIN TRAY
GASKET
NUT
DRAIN STUB
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CKC INSTALLATION
FUSES
COOL ONLY
WITH ELECTRIC
HEATER
SYSTEM
1PH 3PH 1PH 3PH
CX(E) 30
16A - 16A -
CX(E) 40
20A - 20A -
CX(E) 50
20A - 20A -
CX(E) 70
20A 20A/PH 32A 20A/PH
Note: On 3 ph systems the supply must go to the CKC outdoor unit and then to the CX(E) indoor unit.
WIRING DIAGRAM
MOUNTING
Whether floor or wall mounted, it is essential that the mounting surface is capable of supporting the unit
weight. Leave space around the unit for air circulation and access for installation and maintenance.
1500 min air off
100 min
100 min
600 min
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CKC DIMENSIONS
Dimensions in mm.
(Dimensions in
mm.)
1. Individual pipe runs to a maximum of 20m, including 7.5m lift, are permissible with liquid lines, 80m
with expansion lines, provided good refrigeration practice is followed.
Performance is based on 7.5m pipe runs. Correctly sized pipes for each installation will result in no
significant loss of capacity on extended pipe runs.
a) Pipe sizes are based on:-
Minimum of 3.8 m/s (750 fpm) suction gas velocity for horizontal or downflow.
Minimum of 7.6 m/s (1500 fpm) suction gas velocity for upflow.
Maximum of 15.2 m/s (3000 fpm) suction gas.
b) Where vertical risers exceed 3m, oil traps must be formed in the pipe. This will help ensure that oil
returns to the compressor. Typically fit an oil trap every 3m with a trap at the bottom of the riser.
2. In calculating equivalent lengths of pipe runs, the effect of bends and fittings must be taken into
account. The table below covers the fittings most likely to be encountered in this installation.
The equivalent lengths of all the fittings in a pipe run should be added together and the total added to
the actual pipe length in order to calculate the total equivalent length.
3. Use the shortest possible route, avoiding sharp bends.
4. Completely insulate the suction line, fully over the indoor unit drain tray.
FITTING LOSSES, in equivalent straight lengths of pipe (m).
Pipe Size OD
FITTING
3/8" 1/2" 5/8" 3/4" 7/8"
45° Bend 0.12 0.15 0.18 0.21 0.24
90° Bend R/d = 1 0.37 0.43 0.49 0.55 0.61
90° Bend R/d = 1.5 0.24 0.27 0.3 0.37 0.43
180° Bend R/d = 1.5 0.73 0.91 1.1 1.28 1.46
180° Bend C/d = 2.5 0.46 0.55 0.64 0.76 0.85
90° Elbow 0.67 0.85 1.04 1.25 1.46
To calculate the total equivalent
length, the equivalent lengths of
all fittings in a pipe run must be
added to the actual length of pipe
in the run: these are the fittings
most likely to be used.
R = Radius of bend
d = Diameter of tube
C = Centres of bend
A. USING SUCTION AND LIQUID LINES:
With the expansion device connected to the indoor unit, the equivalent pipe run should be 20m maximum,
including a maximum lift of 7.5m. Fully insulate the suction line. Ensure the suction pipe is insulated well over
the drain tray at the indoor unit. Liquid lines should be routed to avoid hot areas. This prevents flash gas
forming, which may result in erratic control of liquid refrigerant to the evaporator.
MODEL A B C D E F G H
CKC 20
900 300 560 525 185 60 333 308
CKC 30
900 300 560 525 185 60 333 308
CKC 50
1000 300 660 570 213 60 333 308
CKC 80
1000 300 660 570 213 60 333 308
CKC PIPEWOR
K
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NOTE
When the CX(E)30 is
matched with a CKR 30. The
restrictor in the
indoor unit must be changed
to 0.037"
MAXIMUM EQUIVALENT LENGTH OF SUCTION LINE PIPE SIZES (m) LIQUID LINE
SYSTEM
3/8" 1/2" 5/8" 3/4" 1/4" 3/8"
CX(E)30 + CKC20
7.5
20
-
-
20 -
CX(E)40 + CKC30
- 15 20 - - 20
CX(E)50 + CKC50
-
7.5
18
-
- 20
CX(E)70 + CKC80
-
-
11
20
- 20
B. USING SUCTION AND EXPANSION LINES
The expansion assembly must be removed from the indoor unit and connected to the outdoor unit allowing a
pipe run of up to 80m, including a maximum lift of 20m (CKC20 maximum 50m with 7.5m lift).
CX(E) units only, remove the right hand panel cover plate from the indoor unit and remove the expansion
assembly. [Make good the gap using Extended Pipe Run Kit 55900709 (30,40,50), 55900710 (70).]
Fit the expansion assembly onto the outdoor unit liquid line service valve. Fully insulate both the suction and
expansion lines, including the expansion device: ensure the pipes are insulated well over the drain tray at the
indoor unit.
MAXIMUM EQUIVALENT LENGTH OF SUCTION LINE PIPE
SIZES (m)
EXPANSION LINES
SYSTEM
3/8" 1/2" 5/8" 3/4" 7/8" 3/8" 1/2" 5/8"
CHARGE
(kgs) AT
7.5m
CX(E)30 + CKC20
7.5 23 50 - - 50 - - 1.05
CX(E)40 + CKC30
- 10 36 80 - 7.5 80 - 1.10
CX(E)50 + CKC50
- 7.5 18 50 80 7.5 50 80 1.98
CX(E)70 + CKC80
- - 11 30 80 - 50 80 2.94
PIPE CONNECTIONS
Units are supplied with the following
male flare connections (sizes in inches):
RESTRICTORS
Indoor units are supplied with restrictors fitted.
INTERCONNECTING PIPEWORK
1. Indoor and outdoor units have a low pressure charge of N
2
, which may be safely released into the
atmosphere before connection. The service valves on the outdoor unit should remain closed (IN, fully
clockwise) until pipework has been fitted, to avoid unnecessary moisture ingress.
2. Connecting the pipework
a. Remove the flare nuts from the suction and liquid service valves.
b. Ensure that the suction line is fully insulated: if an expansion line is used this should also be fully
insulated.
c. Place the flare nuts over the incoming pipework and flare the pipe ends. The use of a little
refrigeration oil on the flaring tool will help.
d. Connect the pipework between the units. Do not leave pipe ends, valves etc. open to the
atmosphere.
R407C is very hygroscopic, and will absorb damaging levels of moisture if left open.
Always use two spanners when tightening the flare nuts to avoid twisting the pipes. Use a small
amount of refrigerant oil on the mating surfaces.
e. Sight glasses and filter driers are not necessary, but if required should be fitted between the
outdoor unit liquid shut off valve and the expansion device.
OUTDOOR UNIT CKC20 CKC30 CKC50 CKC80
LIQUID / EXPANSION 3/8" 3/8" 3/8" 1/2"
SUCTION 1/2" 1/2" 1/2" 5/8"
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EVACUATING
1. Release the nitrogen holding charge in the indoor and outdoor units to atmosphere. Open the valves
(hex drive fully out) using a 5mm Allen key. Connect a vacuum pump to the service ports on the
outdoor unit valves and evacuate the system to 1000 microns (1 Torr) or better and allow to be held
for a minimum of 15 minutes.
2. Replace the caps on the service ports, (torque to 25NM).
CKC ELECTRICAL
The installer supplies mains, control and interconnecting cables: equipment must be earthed.
Wiring must be carried out in accordance with local and national codes.
Mains supply cables must be size compatible with the recommended fuse (see indoor unit instruction
for system fuse size).
An all pole isolator switch should be positioned within easy reach of the indoor/outdoor unit dependant
on which receives the fuse supply.
Cable clamps for use with stranded cables are supplied and should be used to secure
incoming/outgoing cables. Installers must supply a method of securing solid sheathed cables.
3PH CKC 80
On 3 PH CKC 80 it is possible for the scroll compressor to run backwards.
This becomes obvious on start up - the compressor will not develop a normal running pressure differential
and the top will not become warm: it may be excessively noisy. If this happens, switch off the mains power
and exchange the two supply phases not
connected to the indoor unit. This will correct the rotation.
ISOLATOR SWITCHES
On a 3 phase system, ensure that the neutral contact of the isolator switch is an early make, late break type.
This applies to all switches in the supply line. If in doubt, do not switch the neutral but connect it solidly.
WIRING
Cable entry for the outdoor unit electrics is through the cabinet to a terminal block.
Ensure that all connections are secure and that both units are earthed.
CKC fan motors have a single speed and are ready for use at all outdoor temperatures.
NOTE: The CKC wiring diagram can be found on the inside of the front panel.
INTERCONNECTING WIRING
REFRIGERANT
CABLE FOR CONTROL CIRCUIT
0.75 mm² 2.5 mm²
-
POWER CABLE TO SUIT SUPPLY FUSE
CABLE TO SUIT INDOOR UNIT LOADING
(ALLOW FOR HEATER LOAD IF FITTED)
PE PE
PE
L3
PE
PE
PE
L
L
L1
L
L
L
N
N
N
N
N
N
CU
CU
CU
3
3
3
FUSED SUPPLY
230V 1PH 50 Hz)
FUSED SUPPLY
230V 1PH 50 Hz)
CX
FUSED SUPPLY
(400V 3PH 50Hz)
CKC 3 PH
CX CX
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FUSES: Refer to indoor unit installation instructions.
ADDING REFRIGERANT
1. The unit is fitted with head pressure control; before charging, isolate the outdoor unit and transfer the
motor wire on the head pressure control from terminal 4 to terminal 1. (Don't forget to transfer it
back after charging).
2. If a manual HP cutout is fitted, ensure that the reset button is depressed.
3. A 3 minute delay occurs between successive compressor operations.
4. R407C should be introduced through the Schrader valve on the indoor unit, or the service port on the
suction service valve on the outdoor unit. No other refrigerant must be used.
NOTE: LABEL R407C POE (supplied loose) TO BE FIXED ABOVE SERVICE VALVES.
CHARGE (g)
LIQUID LINE (m)
SYSTEM
5
10 15 20
No extra POE oil needed with liquid lines.
Charges shown are for guidance: actual charge will depend on
the individual application. It is recommended that you charge to a
sweat line on the outlet of the evaporator and/or a full sight glass
if fitted.
CX(E)30 + CKC20
1025 1140 1255 1370
CX(E)40 + CKC30
1230 1530 1830 2130
Liquid line
Expansion line
CX(E)50 + CKC50
1980 2280 2580 2880
1/4"
3/8"
3/8"
1/2"
5/8"
R407C
CX(E)70 + CKC80
2220 2520 2820 3120
Additional
charge
based
on:-
25 g/m 60 g/m 16 g/m 30 g/m 48 g/m
EXPANSION LINE (m)
SYSTEM
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
CX(E)30 + CKC20
990 1070 1150 1230 1310 1390 1470 1550 1630 1710 - - - - - -
CX(E)40 + CKC30
1000 1220 1370 1520 1670 1820 1970 2120 2270 2420 2570 2720 2870 3020 3170 3320
CX(E)50 + CKC50
1940 2055 2205 2355 2505 2655 2805 2955 3105 3255 3495 3735 3975 4215 4455 4695
R407C
CX(E)70 + CKC80
2865 3015 3165 3315 3465 3615 3765 3915 4065 4215 4455 4695 4935 5175 5415 5655
CX(E)30 + CKC20
0 0 0 0
25 25 25 50 50 50 - - - - - -
CX(E)40 + CKC30
0 0 0 0 50 50 50 50 100 100 100 100 100 150 150 150
CX(E)50 + CKC50
0 0 0 0
50 50 50 50 100 150 150 150 200 200 200 250
POE
OIL
(EXP.
LINE)
CX(E)70 + CKC80
0 0 0 0
50 50 100 100 100 150 150 150 200 200 200 250
☺
☺
4
4
4
4
HPC
1234
BLUE MOTOR WIRE
CKC REFRIGERANT
Page 14
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1500 min air off
100 min
100 min
600 min
Cover on
CKR 30 only
CKR INSTALLATION
CKR DIMENSIONS & WEIGHTS
5. Run the system for a few minutes to allow it to stabilize. Where possible, charge to a sweat line on the
evaporator. Typical suction pressure on short lines at UK conditions should be approx. 3.8bar (55
psig).
6. Transfer the motor wire back from terminal 1 to 4 on the HPC pcb.
7. Head pressure controller
The HPC is factory set to suit R407C refrigerant. It may be necessary to adjust this to suit site
conditions, to raise or lower the nominal head pressure.
I. With the system switched off, connect a high pressure gauge to the liquid line service valve.
II. Switch on the system, indoor fan set to high speed and run for a few minutes to stabilise.
III. The head pressure should be approximately 275-280
psig (18.9-19.6 barg). To achieve this adjust the
screw clockwise to increase the pressure by approx
5 psig (0.5barg)
NOTE: Min fan speed (0 rpm) and fan cut in pressure (230psig /
15.6 barg) are factory set and not adjustable.
MOUNTING
Whether floor or wall mounted, it is essential that the
mounting surface is capable of supporting the unit weight.
Leave space around the unit for air circulation and access
for installation and maintenance.
Dimensions in mm
Dimensions in mm
MODEL A B C D E F G H
J
Operating
Weight (kg)
CKR 30
795 255 525 510 145 50 320 295 20 39
CKR 50
850 295 585 505 170 65 345 310 25 48
CKR 80
870 310 680 590 140 55 360 335 6 62
Electrics box
Head pre s sure
adjustm ent screw
Fan capacitor
Page 15
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55908014-06
CKR PIPEWORK
MAXIMUM EQUIVALENT PIPE LENGTHS 15m
1. Performance is based on 7.5m pipe runs. Correctly sized pipes for each installation will result in no
significant loss of capacity on extended pipe runs up to 15m.
a) Pipe sizes are based on: -
Minimum of 3.8 m/s (750 fpm) suction gas velocity for horizontal or downflow.
Minimum of 7.6 m/s (1500 fpm) suction gas velocity for upflow.
Maximum of 15.2 m/s (3000 fpm) suction gas.
b) Where vertical risers exceed 3m, oil traps must be formed in the pipe. This will help ensure that oil
returns to the compressor. Typically fit an oil trap every 3m with a trap at the bottom of the riser.
2. In calculating equivalent lengths of pipe runs, the effect of bends and fittings must be taken into
account. The table below covers the fittings most likely to be encountered in this installation.
The equivalent lengths of all the fittings in a pipe run should be added together and the total added to
the actual pipe length in order to calculate the total equivalent length.
3. Use the shortest possible route, avoiding sharp bends.
4. Completely insulate the suction line, fully over the indoor unit drain tray.
FITTING LOSSES, in equivalent straight lengths of pipe (m).
Pipe Size OD
FITTING
3/8" 1/2" 5/8"
45° Bend 0.12 0.15 0.18
90° Bend R/d = 1 0.37 0.43 0.49
90° Bend R/d = 1.5 0.24 0.27 0.30
180° Bend R/d = 1.5 0.73 0.91 1.10
180° Bend C/d = 2.5 0.46 0.55 0.64
90° Elbow 0.67 0.85 1.04
To calculate the total equivalent
length, the equivalent lengths of
all fittings in a pipe run must be
added to the actual length of
pipe in the run: these are the
fittings most likely to be used.
R = Radius of bend
d = Diameter of tube
C = Centres of bend
A. SUCTION AND LIQUID LINES:
The expansion device is connected to the indoor unit and the equivalent pipe run is 15m maximum, including
a maximum lift of 7.5m. Fully insulate the suction line. Ensure the suction pipe is insulated well over the drain
tray at the indoor unit. Liquid lines should be routed to avoid hot areas. This prevents flash gas forming,
which may result in erratic control of liquid refrigerant to the evaporator.
MAXIMUM EQUIVALENT LENGTH OF
SUCTION LINE PIPE SIZES (m)
LIQUID LINE
SYSTEM
3/8" 1/2" 5/8" 1/4" 3/8" 1/2"
CHARGE
(kgs) AT
7.5m
CX(E)30 + CKR 30
-
15
-
7.5
15
- 1.32
CX(E)50 + CKR 50
-
15
-
-
15
- 1.80
CX(E)70 + CKR 80
-
-
15
-
-
15 2.40
PIPE CONNECTIONS
Page 16
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55908014-06
Units are supplied with the following male flare connections (sizes in inches):
OUTDOOR UNIT CKR30 CKR50 CKR80
LIQUID
3/8" 3/8" 1/2"
SUCTION
1/2" 1/2" 5/8"
RESTRICTORS
NOTE: When the CX(E)30 is matched with a CKR30. The restrictor in the indoor unit must be changed
to 0.037".
The restrictor factory fitted to the CX(E)50 and CX(E)70 do not need changing.
INTERCONNECTING PIPEWORK
1.
Indoor and outdoor units have a low pressure charge of N2, which may be safely released into the
atmosphere before connection. The service valves on the outdoor unit should remain closed (IN, fully
clockwise) until pipework has been fitted, to avoid unnecessary moisture ingress.
2. Connecting the pipework
a. Remove the flare nuts from the suction and liquid service valves.
b. Ensure that the suction line is fully insulated.
c. Place the flare nuts over the incoming pipework and flare the pipe ends. The use of a little
refrigeration oil on the flaring tool will help.
d. Connect the pipework between the units. Do not leave pipe ends, valves etc. open to the
atmosphere.
R407C is very hygroscopic, and will absorb damaging levels of moisture if left open.
Always use two spanners when tightening the flare nuts to avoid twisting the pipes. Use a small
amount of refrigerant oil on the mating surfaces.
e. Sight glasses and filter driers are not necessary, but if required should be fitted between the
outdoor unit liquid shut off valve and the expansion device.
EVACUATING
1. Release the nitrogen holding charge in the indoor and outdoor units to atmosphere. Open the valves
(hex drive fully out) using a 5mm Allen key. Connect a vacuum pump to the service ports on the
outdoor unit valves and evacuate the system to 1000 microns (1 Torr) or better and allow to be held
for a minimum of 15 minutes.
2. Replace the caps on the service ports, (torque to 25NM).
Page 17
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55908014-06
CKR ELECTRICAL
ELECTRICAL CONNECTIONS
The installer supplies mains, control and interconnecting cables: equipment must be earthed.
Wiring must be carried out in accordance with local and national codes.
Mains supply cables must be size compatible with the recommended fuse (see indoor unit instruction for
system fuse size).
An all pole isolator switch should be positioned within easy reach of the indoor/outdoor unit dependant on
which receives the fused supply.
Cable clamps for use with stranded cables are supplied and should be used to secure incoming/outgoing
cables.
WIRING
Cable entry for the outdoor unit electrics is through the cabinet to a terminal block.
Ensure that all connections are secure and that both units are earthed.
CKR fan motors have a single speed and are ready for use at all outdoor temperatures.
NOTE: The CKR wiring diagram can be found on the inside of the lid.
INTERCONNECTING WIRING
FUSES: Refer to indoor unit installation instructions.
CABLE FOR CONTROL CIRCUIT
0.75 mm² 2.5 mm²
-
POWER CABLE TO SUIT SUPPLY FUSE
CABLE TO SUIT INDOOR UNIT LOADING
(ALLOW FOR HEATER LOAD IF FITTED)
PE
PE
PE
PE
L
L
L
L
N
N
N
N
CU
CU
3
3
FUSED SUPPLY
230V 1PH 50 Hz)
FUSED SUPPLY
230V 1PH 50 Hz)
CX CX
Page 18
18/23
55908014-06
CKR REFRIGERANT
Electrics box
Head pressu r e
adjustment screw
Fan capacitor
ADDING REFRIGERANT
1. The unit is fitted with head pressure control; before charging, isolate the outdoor unit and transfer the
motor wire on the head pressure control from terminal 4 to terminal 1.
(Don't forget to transfer it back after charging).
2. If a manual HP cutout is fitted, ensure that the reset button is depressed.
3. A 3 minute delay occurs between successive compressor operations.
4. R407C should be introduced through the Schrader valve on the indoor unit, or the service port on the
suction service valve on the outdoor unit. No other refrigerant must be used.
NOTE: LABEL R407C POE (supplied loose) TO BE FIXED ABOVE SERVICE VALVES.
SYSTEM LIQUID LINE (m)
5 10 15
No extra POE oil needed with liquid lines.
Charges shown are for guidance: actual charge will
depend on the individual application. It is recommended
that you charge to a sweat line on the outlet of the
evaporator and/or a full sight glass if fitted
CX(E) 30 + CKR 30 1.17 1.47 1.77
LIQUID LINE
CX(E) 50 + CKR 50 1.65 1.95 2.25
1/4" 3/8"
CX(E) 70 + CKR 80 2.25 2.55 2.85
Additional charge based on:
25 g/m 60 g/m
5. Run the system for a few minutes to allow it to stabilize. Where possible, charge to a sweat line on the
evaporator. Typical suction pressure on short lines at UK conditions should be approx. 3.8bar (55
psig).
6. Transfer the motor wire back from terminal 1 to 4 on the HPC pcb.
7. Head pressure controller
The HPC is factory set to suit R407C refrigerant. It may be necessary to adjust this to suit site
conditions, to raise or lower the nominal head pressure.
I. With the system switched off, connect a high pressure gauge to the liquid line service valve.
II. Switch on the system and run for a few minutes to stabilise.
III. The head pressure should be approximately 275-280 psig (18.9-19.6 barg). To achieve this
adjust the screw clockwise to increase the pressure by approx 5 psig (0.5barg)
NOTE: Min fan speed (0 rpm) and fan cut in pressure (230psig / 15.6 barg) are factory set and not
adjustable.
☺
☺
4
4
4
4
HPC
1234
BLUE MOTOR WIRE
Page 19
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55908014-06
Capillary Entry
Mains Cable Entry
Point
Internal Earth
Terminal
ENL
SPARE
CU
CU OUT
EN
L
MAINS IN
De - Ice
Thermostat
Capacitor
Incoming Fan
Wires
Thermostat
Switch
Digital
Temperature
Display
INSIDE VIEW OF ELECTRICS BOX
4
13
11
12
15
14
2
3
1
5
6
10
9
8
7
4
CX(E) INDOOR UNIT COMPONENT IDENTIFICATION
1
Grille
9
De-ice stat (option)
2
Fan / motor
10
Heater assembly (option)
3
Case
11
Drain stub adaptor
4
Wall / ceiling mounting brackets
12
Drain tray
5
Heater bracket
13
Side access panel
6
Coil assembly
14
Electrics box door
7
Thermostat bulb & bracket
15
Digital display (option)
8
Restrictor assembly / extended pipe (option)
Page 20
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55908014-06
CKC OUTDOOR UNIT COMPONENT IDENTIFICATION
1
LID
18
FRONT ACCESS
2
CONTACTOR
19
FAN GUARD
3
OVERLOAD
20
FASCIA PANEL
4
HEAT EXCHANGER COIL
21
CORNER PANEL
5
REAR ACCESS PANEL
22
SUPPORT BRACKET
6
MAINS TERMINAL COVER
23
FAN / MOTOR ASSEMBLY
7
FAN CAPACITOR
24
END CLAMP
8
BULKHEAD PANEL
25
TERMINAL
9
HP SWITCH (MANUAL, OPTION)
26
FUSE
10
SERVICE VALVE (LIQUID)
27
FUSE TERMINAL
11
SERVICE VALVE (SUCTION)
28
TERMINAL (4 WAY)
12
VALVE PANEL
29
EARTH TERMINAL
13
BASE
30
HEAD PRESSURE CONTROL pcb
14
MOUNTING FOOT
31
3 MINUTE TIMER pcb
15
LP SWITCH
32
COMPRESSOR CAPACITOR
16
COMPRESSOR
33
ELECTRICS BOX
17
HANDLE
Page 21
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55908014-06
CKR 30 OUTDOOR UNIT COMPONENT IDENTIFICATION
LID
REAR GRILL
HEAT EXCHANGER COIL
BULK HEAD PANEL
REAR ACCESS PANEL
SERVICE VALVE COVER
SERVICE VALVE 1/2"
SERVICE VALVE 3/8”
VALVE PANEL
HP SWITCH
COMPRESSOR
BASE
LP SWITCH
MOTOR SUPPORT BRACKET
FRONT PANEL
FAN GUARD
FAN
MOTOR
CONTACTOR
3 MINUTE TIMER
FAN CAPACITOR
COMPRESSOR CAPACITOR
FAN SPEED CONTROLLER (FSC)
TERMINAL BLOCK
1
2 3 4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Electrics box assembly
Page 22
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55908014-06
Electrics box assembly
CKR 50 OUTDOOR UNIT COMPONENT IDENTIFICATION
BACK PANEL ASSY
HEAT EXCHANGER COIL
BULK HEAD PANEL
VALVE PANEL
SERVICE VALVE 1/2"
SERVICE VALVE 3/8”
HP SWITCH
COMPRESSOR
BASE
LP SWITCH
MOTOR SUPPORT BRACKET
FRONT PANEL
FAN GUARD
FAN
MOTOR
CONTACTOR
3 MINUTE TIMER
FAN CAPACITOR
COMPRESSOR CAPACITOR
FAN SPEED CONTROLLER (FSC)
TERMINAL BLOCK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Page 23
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55908014-06
Electrics box assembly
CKR 80 OUTDOOR UNIT COMPONENT IDENTIFICATION
TEV LTD, ARMYTAGE ROAD, BRIGHOUSE, WEST YORKSHIRE, HD6 1QF. + 44 (0) 1484 405600 +44 (0) 1484 405620
sales@marstair.com www.marstair.com
TEL: FAX:
EMAIL: WEB:
LID
REAR GRILL
HEAT EXCHANGER COIL
REAR ACCESS PANEL
SERVICE VALVE 5/8”
SERVICE VALVE 1/2"
VALVE PANEL
BULK HEAD PANEL
HP SWITCH
COMPRESSOR
BASE
LP SWITCH
MOTOR SUPPORT BRACKET
FRONT PANEL
FASCIA PANEL
FAN GUARD
FAN
MOTOR
SIDE PANEL
CONTACTOR
3 MINUTE TIMER
FAN CAPACITOR
COMPRESSOR CAPACITOR
FAN SPEED CONTROLLER (FSC)
TERMINAL BLOCK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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