Marstair CX Series User manual

55908061-01
CXE PUMP DOWN SPLIT SYSTEMS
TECHNICAL MANUAL
CXE PUMP DOWN LOW TEMPERATURE SPLIT SYSTEMS

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INDEX
CONTENTS
PAGE
PART NUMBERS, UNIT COMBINATIONS, OPTIONS
3
DIMENSIONS & WEIGHTS, PERFORMANCE DATA
4
AIR FLOW, SOUND POWER AND SOUND PRESSURE LEVELS
5
ELECTRICAL DATA
6
CX(E) DIMENSIONS
7
INSTALLATION
8
CKC PIPEWORK
8
CKC REFRIGERANT
10
ELECTRICAL: CONNECTIONS & FUSES
12
CX MATCHES
12
WIRING DIAGRAMS
13
CX(E) CONTROLS
15
CKC INSTALLATION: DIMENSIONS
16
COMPONENT IDENTIFICATION
CX(E) UNITS
17
CKC UNITS
18
COMMISSIONING CHECK LIST
19
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. CXE models are electromechanical / Electronic control units that use R407C refrigerant; they
provide cooling within the range of 2.8 –8.5 kW. These units are matched with CKC pump down
outdoor units to complete a system.
3. CXE Pump Down units are fitted with an expansion assembly and solenoid valve These units
must be ran on a liquid line and matched with the Marstair CKC Pump Down units which are fitted
with a liquid receiver.
4. These units contain live electrical components, moving parts and refrigerant under pressure.
Always site out of reach of children and protect from vandalism.
5. The data plate only gives information for the CXE unit. For system details add input power and
current of indoor and outdoor unit, including any heater load.
GENERAL

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Low Temperature Match
Above 8°C System Matches
Above 4°C System Matches
OPTIONAL KITS
PART
NUMBER
DESCRIPTION
55900715
3kW heater (CXE only)
* When matched with CKC outdoor unit
INDOOR UNIT OUTDOOR UNIT
CXE 40 PD CKC 20 PD
CXE 50 PD CKC 40 PD
CXE 70 PD CKC 60 PD
CXE 90 PD CKC 80 PD
CX(E) OPTIONS
UNIT COMBINATIONS
PART NUMBERS
MODEL CXE 30 PD CXE 40 PD CXE 50 PD
PART NUMBER 55917006 55917007
55917008
MODEL CKC 20 PD 1ph CKC 30 PD 1ph CKC 50 PD 1ph CKC 80 PD 1ph
PART NUMBER 55050800 55050801 55050803 55050805
CXE 70 PD
55917009
CXE 90 PD
55917010
MODEL CXE 40 PD CXE 50 PD CXE 70 PD CXE 90 PD
PART NUMBER 55917007 55917008 55917009 55917010
MODEL CKC 20 PD 1ph CKC 40 PD 1ph CKC 60 PD 1ph CKC 80 PD 1ph
PART NUMBER 55050800 55050802 55050804 55050805
INDOOR UNIT OUTDOOR UNIT
CXE 30 PD CKC 20 PD
CXE 40 PD CKC 30 PD
CXE 50 PD CKC 50 PD
CXE 70 PD CKC 80 PD
CXE 90 PD CKC 90 PD

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Above 8°C System Matches
Above 4°C System Matches
Qualification of Cellar sizing
· Based on standard Cellar Construction
· Maximum product load 16 l/m³
· Product cooling time 24 hours (Nominal plant running time 18 hours)
· Product entering room 25°C
MODEL
CX(E) HEIGHT WIDTH DEPTH WEIGHT HEIGHT WIDTH DEPTH WEIGHT
30 483 845 320 18 530 950 370 21
40 483 845 320 18 530 950 370 21
50 483 845 320 20 530 950 370 23
70 483 845 320 23 530 950 370 26
90 483 845 320 25 530 950 370 28
MODEL
1Ph 3Ph 1Ph 3Ph
20 620 900 310 46 -620 980 340 48 -
30 620 900 310 48 -620 980 340 55 -
50 720 1000 350 64 -730 1090 390 66 -
60 720 1000 350 64 -730 1090 390 66 -
80 720 1000 350 66 64 730 1090 390 68 66
90 820 1000 350 76 73 820 1090 390 78 75
WIDTH
DEPTH
UNPACKED
PACKED
WEIGHT
WEIGHT
UNPACKED
PACKED
CKC
HEIGHT
WIDTH
DEPTH
HEIGHT
PERFORMANCE DATA (kW)
DIMENSIONS & WEIGHTS
Total Sensible Total Sensible Total Sensible
kW kW kW kW kW kW
40 20 2.1 1.6 0.76 1.9 1.45 0.76 1.8 1.38 0.77
50 40 3.3 2.46 0.75 3.1 2.32 0.75 3 2.25 0.75
70 60 5 3.53 0.71 4.7 3.33 0.71 4.5 3.2 0.71
90 80 5.9 4 0.68 5.7 3.9 0.68 5.5 3.8 0.69
5/3 & 35
CX
CKC
SHR
SHR
SHR
5/3 & 27
5/3 & 32
Above Below Above Below Above Below
kW kW m³ m³ kW kW m³ m³ kW kW m³ m³
30 20 2.8 1.88 31 52 0.67 2.7 1.81 29 49 0.67 2.6 1.74 28 47 0.67
40 30 3.6 2.27 44 72 0.63 3.3 2.12 39 64 0.64 3.1 2.02 36 59 0.65
50 50 5.2 3.23 71 114 0.62 5 3.12 67 109 0.62 4.8 3.02 64 104 0.63
70 80 7.2 4.35 108 169 0.60 6.9 4.2 102 161 0.61 6.6 4.05 96 152 0.61
90 90 8.5 5.04 133 206 0.59 8.2 4.85 127 197 0.59 8 4.68 123 192 0.59
Above Below Above Below Above Below
kW kW m³ m³ kW kW m³ m³ kW kW m³ m³
30 20 2.45 1.6 22 36 0.65 2.3 1.52 20 34 0.66 2.2 1.47 19 33 0.67
40 30 3 1.95 30 51 0.65 2.8 1.83 27 45 0.65 2.6 1.728 25 42 0.66
50 50 4.4 2.78 49 80 0.63 4.2 2.69 47 76 0.64 4 2.6 45 73 0.65
70 80 6.1 3.9 75 118 0.64 5.9 3.75 71 112 0.64 5.7 3.63 67 107 0.64
90 90 7.3 4.55 93 144 0.62 7.1 4.4 89 138 0.62 7 4.31 86 134 0.62
12.7/10 & 35
8/6 & 27
8/6 & 32
8/6 & 35
Total
Sensible
Cellar Size
SHR
12.7/10 & 27
12.7/10 & 32
Total
Sensible
Cellar Size
SHR
SHR
Total
Sensible
Cellar Size
SHR
CX
CKC
SHR
Total
Sensible
Cellar Size
Total
Sensible
Cellar Size
SHR
CX
CKC
Total
Sensible
Cellar Size

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AIR FLOWS
INDOOR UNIT
Sound Pressure Levels in dB(A) at 10m distance in free field conditions. (Reference 2x10 ⁻⁵ N/m²)
OUTDOOR UNIT
Sound Pressure Levels (SPL) at 10m distance in free field conditions. (Reference 2x10 ⁻⁵ N/m²)
125 250 500 1K 2K 4K dB(A)
CX(E) 30 69.1 67.7 67.6 65.6 62.2 56 39
CX(E) 40 69.1 67.7 67.6 65.6 62.2 56 39
CX(E) 50 71.7 69.2 69.1 67.1 63.2 58.5 40.5
CX(E) 70 70.1 68.2 68.6 66.1 63.2 57.5 39.9
CX(E) 90 70.1 68.2 68.6 66.1 63.2 57.5 39.9
MAXIMUM
SPEED
SOUND POWER LEVELS
Frequency Hz
SOUND PRESSURE
LEVELS
125 250 500 1K 2K 4K dB(A)
CKC 20 77 67 69 65 60 54 39.2
CKC 30 77 68 69 65 60 54 39.3
CKC 40 77 67 69 65 60 54 39.2
CKC 50 74 68 67 66 61 54 38.9
CKC 60 73 68 68 66 62 54 39.3
CKC 80 71 69 68 65 60 54 38.7
CKC90 82 72 69 69 63 57 42.2
MAXIMUM
SPEED
SOUND POWER LEVELS
SOUND PRESSURE
LEVELS
Frequency Hz
SOUND POWER AND SOUND PRESSURE LEVELS
MODEL m³/s MODEL m³/s
CX(E) 30 0.61 CKC 20 0.32
CX(E) 40 0.61 CKC 30 0.71
CX(E) 50 0.66 CKC40 0.71
CX(E) 70 0.58 CKC 50 0.91
CX(E) 90 0.55 CKC 60 0.91
CKC 80 0.91
CKC90 0.91

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Above 8°C System Matches
Above 4°C System Matches
UNIT ELECTRICAL LOADS [230V 50Hz 1Ph (A) or 400V 50Hz 3Ph (A/Ph)]
ELECTRICAL DATA
COOLING HEATING COOLING HEATING
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
CX(E) 90 + CKC 90 4.4 2.9 17.7 13.8 116
COOLING HEATING COOLING HEATING
kW kW AMPS AMPS AMPS
CX(E) 70 + CKC 80 3.2 2.9 5.7 13.8 42
CX(E) 90 + CKC 90 4.4 2.9 7.9 13.8 50
MODEL
INDOOR/OUTDOOR
3 PH 4000V 50Hz
INPUT POWER
FULL LOADS AMPS
SYSTEM MAX.
STARTING CURRENT
SYSTEM MAX.
STARTING CURRENT
INPUT POWER
FULL LOADS AMPS
1 PH 230V 50Hz
MODEL
INDOOR/OUTDOOR
COOLING HEATING COOLING HEATING
kW kW AMPS AMPS AMPS
CXE 40 + CKC 20 1.3 2.9 7.7 13.8 30
CXE 50 + CKC 40 2.1 2.9 10.2 13.8 52
CXE 70 + CKC 60 2.4 2.9 9.8 13.8 63
CXE 90 + CKC 80 3.2 2.9 12.3 13.8 78
MODEL
INDOOR/OUTDOOR
1 PH 230V 50Hz
INPUT POWER
FULL LOADS AMPS
SYSTEM MAX.
STARTING CURRENT
MODEL
FAN
MOTOR
HEATER
CX(E) 30 0.8 13
CX(E) 40 0.8 13
CX(E) 50 0.8 13
CX(E) 70 0.8 13
CX(E) 90 0.8 13
CKC 20 30 40 50 60 80 90
Fan motor 0.4 0.6 0.6 0.6 0.6 0.6 0.6
R407C compressor
(1 Ph) nominal FLA
6 10.4 10.2 8.3 9.8 10.9 16.3
R407C compressor
(3 Ph) nominal FLA
- - - - - 4.3 6.5
Crankcase heater 0.25 0.25 0.25 - - - -

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CX(E) DIMENSIONS
DIMENSIONS (mm)
CONDENSATE DRAIN 22mm OD
96
35 65 TYP.
140
75
215 36
17.5
17.5
39
39
124
422.5
70
845
888
124
888 (Fixing centres)
(Fixing centres)
320
96
MIN. 500
FOR SIDE ACCESS
483
20
X = Interconnecting Wiring
Z1= Suction
Z2= Liquid / Expansion
SIDE VIEW
(Wall mounted)
X
Z1
Z2
X
SIDE VIEW
(Ceiling mounted)
TOP VIEW
(Ceiling Mounted)
REAR VIEW
(Wall mounted)
FRONT VIEW
(Wall mounted)
120
MIN. 120
MIN.

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INSTALLATION
CONTENTS
PARTS DESCRIPTION
QTY
ACTION
Envelope containing operating instructions and
Declaration of Conformity
1
Pass to the end user.
Mounting brackets
2
Use to hang unit.
Drain Stub/Nut/Gasket
1
Fitted by installer.
Drain stub adaptor
1
Convert to ¾" drain if required.
Screw M5
6
To fix brackets to unit.
Washer nylon
6
To fix brackets to unit.
Washer M5 shakeproof
6
To fix brackets to unit.
Reducing flare nut 1/2” – 3/8”
1
Fit to liquid connection on the CXE 70 indoor unit
when matched with a CKC 60 outdoor unit
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.
UNIT COMBINATIONS
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 removable side panel).
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. Refit the drain tray.
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.
FITTING LOSSES, in equivalent straight lengths of pipe (m).
FITTING
Pipe Size OD
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
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
A. USING SUCTION AND LIQUID LINES:
With the expansion device connected to the indoor unit, the equivalent pipe run should be 45m (20m for CKC20) 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.
SYSTEM 3/8" 1/2" 5/8" 3/4" 7/8" 1/4" 3/8" 1/2" 5/8"
CX(E)30 + CKC20 7.5 20 - - - 20 - - -
CX(E)40 + CKC30 - 15 45 - - - 45 - -
CX(E)50 + CKC50 - 7.5 18 45 - - 20 45 -
CX(E)70 + CKC80 - - 11 30 45 -20 45 -
CX(E)90 + CKC90 - - 10 25 45 - - 20 45
LIQUID LINE (m)
MAXIMUM EQUIVALENT LENGTHOF SUCTION LINE PIPE SIZES (m)
DRAIN TRAY
GASKET
NUT
DRAIN STUB
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
CX(E) 30 CKC 20 CXE 40 CKC 20
CX(E) 40 CKC 30 CXE 50 CKC 40
CX(E) 50 CKC 50 CXE 70 CKC 60
CX(E) 70 CKC 80 CXE 90 CKC 80
CX(E) 90 CKC 90
Minimum Set Temperature 8°C
Minimum Set Temperature 4°C

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PIPE CONNECTIONS
Units are supplied with the following male flare connections (sizes in inches):
INDOOR UNIT CX(E)30 CX(E)40 CX(E)50 CX(E)70 CX(E)90
LIQUID / EXPANSION 3/8" 3/8" 3/8" 1/2" 1/2"
SUCTION 1/2" 1/2" 1/2" 5/8" 5/8"
OUTDOOR UNIT CKC20 CKC30 CKC40 CKC50 CKC60** CKC80 CKC 90
LIQUID / EXPANSION 3/8" 3/8" 3/8” 3/8" 3/8” 1/2" 1/2"
SUCTION 1/2" 1/2" 1/2” 1/2" 5/8” 5/8" 5/8"
SYSTEM 3/8" 1/2" 5/8" 3/4" 7/8" 1/4" 3/8" 1/2"
CX(E)40 + CKC20 7.5 20 - - - 20 - -
CX(E)50 + CKC40 - 15 36 45 - - 20 45
CX(E)70 + CKC60 - 7.5 14 36 45 -20 45
CX(E)90 + CKC80 - - 11 30 45 -20 45
MAXIMUM EQUIVALENT LENGTH OF SUCTION LINE PIPE SIZES (m)
LIQUID LINE

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RESTRICTORS
Indoor units are supplied with restrictors fitted.
INTERCONNECTING PIPEWORK
1. The indoor unit has 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 and system evacuated.
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.
EVACUATING
1. 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).
ADDING REFRIGERANT
1. All units are fitted with head pressure control. The link wire across the orange terminals allows the fan
to operate at full speed. THIS SHOULD BE REMOVED AFTER CHARGING
2. If a manual HP cut-out 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.
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.
CKC REFRIGERANT
NOTE
When the CXE 40 is matched with a CKC 20.
The restrictor in the indoor unit must be changed to 0.033"
When the CXE 50 is matched with a CKC 40.
The restrictor in the indoor unit remains as a 0.050"
When the CXE 70 is matched with a CKC 60.
The restrictor in the indoor unit must be changed to 0.057"
When the CXE 90 is matched with a CKC 80.
The restrictor in the indoor unit must be changed to 0.063"

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Charge
based on:-
Liquid line
Expansion line
1/4"
3/8"
3/8"
1/2"
5/8"
25 g/m
60 g/m
16 g/m
30 g/m
48 g/m
Additional POE oil
25g per 350g of additional refrigerant to a maximum of 300g
NOTE: The new 50 Series CKC are supplied with a Nitrogen holding charge. See pages 12 & 13 for
refrigerant charge information.
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. Head pressure controller
The head pressure controller is factory set to suit the refrigerant. It may be necessary to adjust this to
suit site conditions, to raise or lower the nominal head pressure.
a. With the system switched off, connect a high pressure gauge to the liquid line service valve.
b. Switch on the system, and run for a few minutes to stabilise.
c. The head pressure should be approximately:
R407C: 275-280 psig (18.9-19.6barg) to achieve this remove sealing plug and insert 2mm or 5/64” allen key
into setting screw. Turn allen key clockwise (+) or counter clockwise (-) to readjust the setting. Do not turn
setting screw more than 3 turns clockwise (+3). Use following table as a quick guideline for setting:
After adjustment, re-insert sealing plug and make sure that it is properly fitted. IP65 protection requires
firmly sealed plug
NOTES:
Tolerances for condensing temperatures setpoint: ±2K
Min fan speed (0 rpm) and fan cut in pressure 200 psig (13.8 barg) are factory set and not adjustable.
NOTE: The condenser fan may stop if the operating pressure drops below 200 psig (13.8 barg)

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ELECTRICAL CONNECTIONS
•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.
FUSES
LOW TEMPERATURE CXE PUMP DOWN 17 SERIES MATCHED WITH CKC 50
SERIES UNITS WITH MICROCHANNEL COIL
CXE PUMP DOWN 17 SERIES MATCHED WITH CKC 50 SERIES UNITS WITH
MICROCHANNEL COIL
COOL ONLY
WITH ELECTRIC
HEATER
1PH 1PH
CXE 30 5A 16A
CXE 40 5A 16A
CXE 50 5A 16A
CXE 70 5A 16A
CXE 90 5A 16A
SYSTEM 1PH 3PH
CKC 20 16A -
CKC 30 16A -
CKC 40 20A -
CKC 50 16A -
CKC 60 20A -
CKC 80 25A 10A/PH
CKC 90 25A 16A/PH
SYSTEM
CXE CKC 5 10 15 20 25 30 35 40 45
CX(E)30 + CKC20 55917006 55050800 829 954 1079 1204
CX(E)40 + CKC30 55917007 55050801 1034 1334 1634 1934 2234 2534 2834 3134 3434
CX(E)50 + CKC50 55917008 55050803 1366 1666 1966 2266 3816 4366 4916 5466 6016
CX(E)70 + CKC80 55917009 55050805 1490 1790 2090 2390 3940 4490 5040 5590 6140
CX(E)90 + CKC90 55917010 55050806 2400 2950 3500 4050 6100 6960 7820 8680 9540
Part Number
System
Liquid Line
R407C
CXE CKC 5 10 15 20 25 30 35 40 45
CXE 40 + CKC 20 55917007 55050800 739 864 989 1114
CXE 50 + CKC 40 55917008 55050802 956 1256 1556 1856 3406 3956 4506 5056 5606
CXE 70 + CKC 60 55917009 55050804 1350 1650 1950 2250 3800 4350 4900 5450 6000
CXE 90 + CKC 80 55917010 55050805 1590 1890 2190 2490 4040 4590 5140 5690 6240
R407C
Liquid Line
System
Part Number

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WIRING DIAGRAM
CXE PUMP DOWN
Note: Only 'Mains in' supply needs connecting when running system on pump down, no need to connect to
'CU OUT' Terminals

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CKC PUMP DOWN
Note: Only 'Mains in Live, Neutral & Earth' supply needs connecting when running system on pump down, no
need to connect to 'Remote thermostat -8' or 'Control wire - 42' or 'To Evaporator unit' Terminals
TIMER RELAY SETTINGS
Note: Set for minimum compressor off time, minimum 30 seconds

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CAREL IR33 Controller
ON/OFF SWITCH
The switch operates the fan motor and is illuminated when power is supplied to the indoor unit. When switched OFF, the
fan stops, the switch remains illuminated and the crankcase heater in the outdoor unit (if fitted) remains live.
TEMPERATURE CONTROL (Do not set the controller below 4⁰C.)
The SET temperature is factory set at 12⁰C.
The digital display normally displays the return air temperature.
To change the SET temperature, press and hold down the SET button. If no
alarms active, the ‘St1’ label appears and the current value is shown on the screen
and will flash.
To change the Setpoint value, press ▲ and ▼ keys within 60 seconds.
The display will revert to the return air temperature after 60 seconds.
The fitted de-ice thermostat will activate a de-ice cycle when there is a build up of ice
on the evaporator coil.
Cellarators will only heat a room if the electric heater option is fitted.
Displaying inputs on screen display
Press ▼ to display the current input. There are 6 inputs to select from to display
onto the screen. These are as follows:
b1: probe 1;
b2: probe 2;
di1: digital input 1;
di2; digital input 2;
St1: set point 1;
St2: set point 2;
Press ▲ and ▼ to select the input to be displayed. Press set for 3
seconds to confirm your choice.
To display the live temperature in the room you need to select
b1: probe 1
WARNING
The following actions could damage your system:
1. Switching the unit OFF and ON quickly
2. Setting the unit to HEAT and then back to COOL quickly
NB: Allow at least 3 minutes between the above actions.
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
CX(E) 30 CKC 20 CXE 40 CKC 20
CX(E) 40 CKC 30 CXE 50 CKC 40
CX(E) 50 CKC 50 CXE 70 CKC 60
CX(E) 70 CKC 80 CXE 90 CKC 80
CX(E) 90 CKC 90
Minimum Set Temperature 8°C
Minimum Set Temperature 4°C
CXE ELECTRONIC COOLING SYSTEM CONTROLS

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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.
1. Individual pipe runs to a maximum of 45m (20m for CKC20), including 7.5m lift, are permissible with
liquid lines. 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.
CKC PIPEWORK
CKC INSTALLATION
MODEL A B C D E F G H
CKC 20 900 300 560 525 185 60 295 275
CKC 30 900 300 560 525 185 60 295 275
CKC 40 900 300 560 525 185 60 295 275
CKC 50 1000 350 660 495 250 60 345 325
CKC 60 1000 350 660 495 250 60 345 325
CKC 80 1000 350 660 495 250 60 345 325
CKC 90 1000 350 760 495 250 70 345 325

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1
Grille
9
De-ice stat
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
Thermostat
8
Restrictor assembly
16
Solenoid Valve
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
CX INDOOR UNIT COMPONENT IDENTIFICATION

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CKC OUTDOOR UNIT COMPONENT IDENTIFICATION

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Commissioning Check List
The following information will be required to validate your 5yr parts warranty
Check and record
Value
Time Held For
Leak (tightness) test pressure
(bar)
(min)
Strength (pressure) test pressure
(bar)
(min)
Evacuation level
(microns)
(min)
Value
Low pressure (gauge)
(barg)
Suction line temperature
(°C)
Evaporator superheat
(K)
Evaporator air ON / OFF
(°C) (°C)
High pressure (gauge)
(barg)
Liquid line temperature
(°C)
Condenser sub cooling
(K)
Condenser air ON / OFF
(°C) (°C)
Compressor current
(A)
Head pressure control set
(Y/N)
Refrigerant type
Charged weight
(Kg)
Additional POE oil added
(g)
Pipe run length
(m)
Suction pipe size
(ʺ)
Liquid / Expansion pipe size
(ʺ)
TEV LTD,ARMYTAGE ROAD, BRIGHOUSE, WESTYORKSHIRE, HD6 1QF. + 44 (0) 1484 405600 [phone]
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