Champion ci 40 User manual

Parts and Operator’s Manual
Ci 40 - Ci 110
Read this manual prior to installation and operation of this machine.
Manual No.: 975203 Rev. H
Effective: July 2002
Model : _____________
Serial Number: _____________

Champion Compressors Ltd. Manual No. 975203 Rev H
CONTENTS
1.0 PARTS ORDERING PROCEDURE.....................................................1
2.0 RECOMMENDED SPARE PARTS LIST .............................................2
3.0 INTRODUCTION.................................................................................3
4.0 SAFETY ..............................................................................................4
4.1 General Safety Notes................................................................4
5.0 GENERAL DESCRIPTION AND OPERATION....................................6
5.1 General Description of the Dominator Ci Series........................6
5.2 Principle of Operation ...............................................................7
5.3 Control System .........................................................................8
5.4 Operating Temperature.............................................................8
6.0 TECHNICAL DATA..............................................................................9
7.0 INSTALLATION AND PRE START CHECKS....................................10
7.1 Location..................................................................................10
7.2 Connection To Air System ......................................................10
7.3 Electrical Connection..............................................................11
7.3.1 Ci 40 - 75 (Stop / start control).......................................11
7.3.2 Ci 75 / 110 (Star-delta, CSU).........................................12
7.3.3 Motor Rotation Direction................................................12
7.4 Mechanical Checks.................................................................13
7.4.1 Airend Check.................................................................13
7.4.2 Oil Level Check .............................................................13
7.4.3 Vee Belt Check..............................................................13
7.4.4 System Isolating Gate Valve Check...............................14
8.0 OPERATION.....................................................................................15
8.1 Start-Up Procedure.................................................................15
8.2 Function Of Controls...............................................................15
8.2.1 Stop / Start (Standard Ci 40 - 75):.................................15
8.2.2 Star-delta, CSU (Option Ci75, Standard Ci 110):...........16
8.3 Control Pressure Switch..........................................................17
8.4 Protection Devices..................................................................18
8.5 Thermo Bypass-Valve.............................................................18
9.0 OPTIONS..........................................................................................19

Champion Compressors Ltd. Manual No. 975203 Rev H
9.1 Lead/Lag, Remote Monitoring & Control.................................19
9.1.1 Central Control Box Operation......................................20
9.2 Lead/Lag Control....................................................................22
9.2.1 Lead / Lag Control Box Operation.................................22
9.3 Lead / Lag Pressure Switches................................................23
9.4 Acoustic Hood (Ci 40/55)........................................................24
9.5 Clean Air Pack (Dryer)............................................................24
9.6 Dirty Environment Filter (Cyclopac)........................................24
9.7 No Neutral & Hour-meter (Ci 40/55/75) ..................................24
9.8 Duplex....................................................................................24
9.9 Base-mount............................................................................25
9.10 Sump Heater and Thermal Fan..............................................25
9.11 Auto Restart Option................................................................25
9.12 Phase Failure Relay (Ci 75/110 only).....................................25
10.0 MAINTENANCE................................................................................26
10.1 General ..................................................................................26
10.2 Daily Operation.......................................................................26
10.3 Maintenance Schedule...........................................................27
10.3.1 Initial Service - 250 hours............................................27
10.3.2 Every 1,500 Hours.......................................................27
10.3.3 Every 3,000 Hours (Or Yearly)....................................27
11.0 GENERAL ASSEMBLY COMPONENTS - Ci 40 / 55........................30
12.0 GENERAL ASSEMBLY COMPONENTS- Ci 75................................34
13.0 GENERAL ASSEMBLY COMPONENTS- Ci 110..............................40
14.0 INTEGRATED SCREW COMPONENTS- Ci 40 / 55.........................44
15.0 INTEGRATED SCREW COMPONENTS- Ci 75 / 110.......................46
16.0 ELECTRICAL STARTER ASSEMBLY - Ci75SD/110........................48
17.0 CLEAN AIR PACK ASSEMBLIES.....................................................52
18.0 CYCLOPAC AIR INTAKE ASSEMBLIES..........................................56
19.0 ACOUSTIC HOOD ASSEMBLY........................................................58
20.0 AUTODRAIN ASSEMBLY.................................................................60
21.0 CONTROL BOX DOOR ASSEMBLY................................................62
22.0 CENTRAL CONTROL BOX ASSEMBLY..........................................64
23.0 LEAD / LAG CONTROL BOX DOOR ASSEMBLY............................66

Champion Compressors Ltd. Manual No. 975203 Rev H
24.0 LEAD / LAG CONTROL BOX ASSEMBLY........................................68
25.0 DUPLEX ASSEMBLIES ....................................................................70
26.0 TROUBLESHOOTING.......................................................................72
27.0 GENERAL ARRANGEMENT DRAWINGS........................................73
29.0 CHAMPION NETWORK....................................................................91
APPENDIX A DN - METRIC NOMINAL SIZES ..........................................94

Champion Compressors Ltd. Manual No. 975203 Rev H
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1.0 PARTS ORDERING PROCEDURE
When ordering parts always indicate the Serial No. and Model No. of the
compressor.
The parts should be ordered from the nearest Champion Branch or Champion
Distributor from whom the compressor was purchased (see 29.0 Champion
Network). If for any reason parts cannot be obtained in this manner, please
contact Champion Compressors Head Office directly.
When ordering parts, please be careful to check with your part number
selection for either assembly or kit. If you have any questions, please contact
your nearest Champion Branch.

Champion Compressors Ltd. Manual No. 975203 Rev H
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2.0 RECOMMENDED SPARE PARTS LIST
Description Repair Kit
No. Qty.
2.1 Parts required per 1,500 hour (Type B)
Service
Standard Air Filter Element - Ci 40-55 278766 1
Standard Air Filter Element - Ci 75-110 278767 1
Oil Filter Element Cartridge - Ci 40-110 278877 1
Cyclonic Air Filter Element - Ci 40-110(Optional) 270092 1
Lubricant - Shell Corena CH46 (See Section 6) 831015
2.2 Parts required per 3,000 hour (Type C)
Service (As above plus:)
Separator Element - Ci 40-55 278773 1
Separator Element - Ci 75-110 278765 1
Microfilter Element - Ci 40-55 (If fitted) 211756 1
Microfilter Element - Ci 75-110 (If fitted) 211760 1
Vee Belts (Refer Section 9.0 / 10.0) 2
2.3 Machine Spares
Thermo Valve Repair Kit - 70ºC - Ci 40-110 278875 1
Thermo Valve Repair Kit - 80ºC - Ci 40-110 278876 1
Minimum Pressure Valve Repair Kit - Ci 40-110 278775 1
Inlet Controller - Ci 40-55 278905 1
Inlet Controller - Ci 75-110 278830 1
Airend Seal Kit - Ci 40-110 278763 1
Sight Glass Kit - Ci 40-110 278780 1
O-ring Kit - Ci 40-110 278874 1
Tensiometer 270965 1
2.4 Upgrade Kits
Cyclonic Air Filter Kit - Ci 40-55 159022
Cyclonic Air Filter Kit - Ci 75-110 159023
No Neutral, Hour Meter - Ci 40-55 159021
Clean Air Pack (CRD006) - Ci 40 159036
Clean Air Pack (CRD009) - Ci 55 159037
Clean Air Pack (CRD012) - Ci 75 159038
Clean Air Pack (CRD018) - Ci 110 159039
Acoustic Hood - Ci40-55 159017
Auto Drain Kit 159041
Spare parts Warranty: Type B Service items are warranted for 1000 hours. ULTIMIZER is warranted for 4000 hours (or 1 year,
whichever occurs first). CHAMPION Vee belts are warranted for 6000 hours, if installed by a Champion approved technician. The parts
subjected to warranty must be returned (freight pre-paid), with proof of purchase to Champion Compressors. In general, machine spare
parts are warranted for six months from the date of invoice and subject to Champion Compressors Ltd. standard Warranty Policy, and
Terms and Conditions of Sale of Goods.

Champion Compressors Ltd. Manual No. 975203 Rev H
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3.0 INTRODUCTION
The Dominator range of rotary screw compressors provides efficient
compressed air in a modular design, which allows for customisation and future
expansion of air requirements.
The standard Dominator range of air compressors has many features and
innovations.
Some of these advanced features are as follows:
• Advanced, modified profile screw element.
• Integrated machine componentry for less connections, eliminating oil leaks.
• Simplified intake controller.
• Integrated spin-on separator element for easy servicing and very low oil
carry-over.
• Integrated oil filter, air filter and over pressure protection.
• Minimum noise emission through innovative design.
• Simple machine control and adjustment.
• Easy access to service components.
• Compact modular design which allows for flexible installation and complete
package models, with air receiver and refrigerant dryer, all mounted on the
one unit.
• Integrated thermovalve optimised for ambient conditions.
This operator's manual is written to assist the end user in gaining maximum
use from their compressor unit. Please familiarise yourself with the contents
before placing the unit into service. Correct installation and on going
maintenance using the Champion Maintenance Program and Service Contract
will provide years of trouble-free service.
A copy of this manual should be given to the personnel responsible for
operating the machine within your organisation.
All requests for information, service and spare parts should be directed to
your nearest Champion Compressors’ Customer Support Division, or your
Authorised Champion Compressors’ Service Agent.

Champion Compressors Ltd. Manual No. 975203 Rev H
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4.0 SAFETY
4.1 General Safety Notes
Champion Compressors manufacture the Dominator Ci series so that they
can be operated safely. Persons operating the compressor are ultimately
responsible for their own safety. The following safety precautions are
suggested as a guide to reduce the risk of injuries throughout the life of your
compressor.
• Do not operate the compressor in an unsafe condition. Tag the
compressor with an appropriate Warning Tag and render it inoperative by
disconnecting the power at the source. This will prevent others from being
able to operate it until it is repaired.
• Correct hearing protection must be worn by person(s) working on or around
the compressor whilst the compressor is in operation.
• Before removing the oil filler cap ensure the compressor is not running and
is not pressurised. Shut down the compressor, isolate and bleed the
compressor air receiver before attempting to remove the oil filler cap. Vent
all internal pressure before opening any line, fitting, valve, drain plug,
connection or other component. If you are unsure how to do this contact
your nearest Champion Service Agent.
• Do not vary pressure switch setting from those listed in Section 8.3 without
prior approval from Champion Compressors’ Engineering Department.
Failure to comply to this may void your warranty.
• Do not tamper with or remove the integrated screw or air receiver safety
valves.
• Clean up spills of lubricant or other combustibles immediately. Keep
sparks and other ignition sources at a safe distance. Do not allow smoking
near the compressor.
• Keep electrical wiring and connections clean, free from dust, oil and tightly
clamped.
• Do not operate compressor or optional dryer with any protective guards or
panels removed. This includes the Ci 75 & 110 cabinet, fan & belt guards
or motor fan cowlings. Keep loose clothing and parts of the body away
from fans and other moving parts at all times.

Champion Compressors Ltd. Manual No. 975203 Rev H
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Avoid touching hot fluid, hot surfaces and points of air discharge. The
surfaces of the cooler, motor and airend can become very hot in high ambient
conditions.
• Do not directly breathe the air from this compressor.
• Do not direct compressed air at any part of a person’s body.
When making adjustments or repairs to exposed live parts of the system
maintain dry footing, stand on insulating surfaces and do not contact any
other portion of the compressor. Make adjustments with one hand only so as
to minimise the possibility of creating a current path through the heart. Do not
leave the compressor unattended with open electrical enclosures. If
necessary to do so, disconnect and lock out all power at the source.
All electrical service or installation work must be carried out by a
qualified / certified electrician.

Champion Compressors Ltd. Manual No. 975203 Rev H
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5.0 GENERAL DESCRIPTION AND OPERATION
5.1 General Description of the Dominator Ci Series
Your new Dominator rotary screw compressor will provide you with product
reliability and greatly reduced maintenance, if maintained and operated in
accordance with this manual.
The protection devices fitted to this compressor are provided to offer safety of
operation. The operator is solely responsible for personal safety at all times.
These devices should not be adjusted except by an authorised Champion
Compressors service agent.
The machines can be adjusted to operate at maximum capacity at pressures
of 780,1000 & 1300 kPa, but are supplied as standard at 780 kPa.
For pressure other than standard, check with Champion Compressors’
Support Division should you wish to vary the operating pressure of your
machine.
As standard, each compressor is mounted on an air receiver. The Ci 40 & 55
is mounted on one 150L air receiver, and the Ci 75 & 110 are mounted on
twin tank 220L air receivers.
Optionally, each model can be accompanied by a clean air package
consisting of a refrigerated dryer and microcoalescing filter. Each model is
also available in a version mounted on rubber feet, for applications where a
receiver already exists. The innovative modular design of the Ci series allows
for easy configuration changes, (See Section 9 for full option descriptions).
The Ci 40 - Ci 75 machines all employ three phase direct-on-line starting
(DOL) via a combination pressure switch / off-auto control / starter and motor
overload. These machines will start and stop automatically depending on
system pressure requirements, while the lever control on the pressure switch
is set to ‘Auto’ mode. The Ci 75 is also supplied with an hour meter indicating
hours of operation for service intervals.

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The Ci 110 uses a three phase star-delta starter panel mounted in the lid of
the compressor cabinet. This machine runs continuously, loading and
unloading as required to meet system pressure needs. An Off/Auto switch
mounted in the lid panel of the compressor is provided as a means of control.
An hour meter is provided indicating hours of operation for service intervals.
The Star-delta, Constant Speed Unload (CSU) option is available on the
Ci 75 by customer request.
Service access for your machine is excellent, with ample space provided to
allow for easy servicing of components. All the serviceable components on
the machine are located in convenient positions requiring minimum
disturbance to your compressor package. All models employ a vertical fan
mounted oil cooler, and on the Ci 75 and Ci 110, an air aftercooler is also
provided as standard.
5.2 Principle of Operation
The main functional components of a Dominator rotary screw air compressor
are the integrated rotary screw airend, the drive motor and cooler assemblies.
Unlike other rotary screw air compressors, the integrated rotary screw airend
performs the task of multiple system components. This has the advantage of
reducing the number of connections between components, and also reducing
system complexity.
The integrated screw rotors draw air through the air filter and intake controller.
Oil is injected into the compression space to provide cooling, sealing and
lubrication of the rotors and bearings as they turn, compressing the air. The
compressed air/oil mixture is discharged into the integrated separator vessel,
where most of the oil is removed from the air/oil mixture by mechanical
separation. The glass fibre spin-on separator element removes the remaining
oil.
The oil that is removed by the separator element is returned to the airend
sump via the purge line sight glass. The oil is collected in the separator
vessel and piped to the oil filter, where oil is cleaned before being cooled in
the oil cooler and re-injected into the airend.
After the separator element, the compressed air then flows through the
minimum pressure valve to the air receiver (via the air aftercooler on Ci 75 &
110). The moisture condensation is accumulated in the air receiver and
removed by means of the receiver drain valve or auto drain.

Champion Compressors Ltd. Manual No. 975203 Rev H
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The minimum pressure valve maintains pressure in the integrated screw
during start-up and during off-load operation to assist oil circulation. Back-
flow of compressed air from the air mains into the separator is prevented by a
non-return valve which is incorporated in the minimum pressure valve.
5.3 Control System
The purpose of the control system is to regulate the compressor air intake to
match the amount of air being used. The major components of the control
system are the intake controller, solenoid valve and pressure switch.
As the compressor starts (Stop / Start control only) or switches into DELTA (or
run) mode (Star-delta, CSU Only), the solenoid valve is energised, allowing
the air to enter the compressor. The system pressure rises.
The compressor pumps until the pre-set UN-LOAD pressure switch setting is
reached. The pressure switch then de-energises the solenoid valve, closing
the intake valve and allowing the integrated screw to reduce sump pressure.
On the stop/start models (standard on Ci 40, 55, 75) the compressor will
come to a stop. The load/unload models (standard Ci 110) will continue to
unload (producing no air) for a set time, governed by the setting of the run-on
timer, after which the compressor will enter standby mode, ready to
automatically start when air demand exists.
When mains pressure falls to the pre-set LOAD pressure switch setting, the
solenoid valve is energised, signalling for the inlet valve to open, thus allowing
the compressor to build up pressure to the pre-set level again. This cycle
continues as long as air demand is present.
5.4 Operating Temperature
This unit is designed to work from 0°C to temperatures in excess of 40°C.
Where site ambient temperatures will exceed 40°C (for example in a boiler
room), then it is better to duct the cooling air to the compressor. The oil
temperature is regulated by a thermo-bypass valve. For details on thermo-
bypass valve operation refer to Section 8.5.

Champion Compressors Ltd. Manual No. 975203 Rev H
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6.0 TECHNICAL DATA
UNIT Ci 40 Ci 55 Ci 75 Ci 110
Pressure BAR 7 10 13 7 10 13 7 10 13 7 10 13
cfm 19 16 14 28 21 18 42 34 29 60 50 42
l/s 9.0 7.6 6.6 13.2 9.9 8.5 19.8 16.0 13.7 28.3 23.6 19.8
FAD
(Capacity) m3/min 0.54 0.45 0.40 0.79 0.59 0.51 1.19 0.96 0.82 1.70 1.41 1.19
Drive
System BELTS 2XPZ 2XPZ 2XPZ 2XPZ
Cooling Air
Vol. L/Sec 250 250 1000 1000
Heat
Rejection kW 5.1 7.0 9.5 13.4
Oil Fill Litres 3.5 3.5 4.0 4.0
Av. Sound
Pressure
Level
(10 Bar)
dB(A)
@ 1m
71 72 74 75
Air Outlet
Discharge
Size
DN
BSP ‘F’ DN20 3/4” DN20 3/4” DN25 1” DN25 1”
Motor kW 4.0 5.5 7.5 11.0
RPM 50Hz 2890 2930 2930 2955
RPM 60Hz 3440 3480 3450 3545
IP 55 55 55 55
FLC / 380/50 A 8.5 / 9.4 11.8 / 12.9 15.7 / 17.3 (9.9) 22.8 / 14.3
o/load 415/50
A 8.1 / 8.9 11.1 / 12.2 14.7 / 16.2 (9.3) 21.2 / 13.4
Setting † 440/60 A 8.8 / 9.7 11.8 / 12.9 15.4 / 16.0 (9.7) 22.3 / 14.1
Australia:
Cable Size * mm² 1.0 1.5 1.5 2.5
Fuse Size ♦
(MOTOR START) A 25 32 35 35
Oils:
Factory Fill (Mineral) SMARTLUBE CH46 SMARTLUBE CH46 SMARTLUBE CH46 SMARTLUBE CH46
High Ambient (Mineral) SHELL CORENA S68 SHELL CORENA S68 SHELL CORENA S68 SHELL CORENA S68
Synthetic ♣SULLUBE 32 SULLUBE 32 SULLUBE 32 SULLUBE 32
Motor Bearings SEALED BEARINGS - NO SERVICE REQUIRED
* Example as per AS3008.1.1 Selection of cables Table 12 (Column 4). Note that no
de-rating factors have been applied. Refer to AS3008.1.1 for correct selection and
installation.
♦ If circuit breakers are to be used, use only circuit breakers equivalent to MOTOR
START FUSE.
♣Refer Champion Service if a change from mineral based oil to
synthetic is required.
† Overload settings in brackets are for Ci-75 with Star-delta starter.

Champion Compressors Ltd. Manual No. 975203 Rev H
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7.0 INSTALLATION AND PRE START CHECKS
WARNING: Incorrect Installation May Void Warranty.
Before installing your Champion Compressor check carefully for any transport
damage. Contact Champion Compressors immediately if any such damage is
found.
7.1 Location
The compressor cabinet as supplied is not weather-proof, and the compressor
should be installed inside (or in a sheltered location outside). The compressor
should be installed in such a way that the locations with respect to walls and
ceiling meet the requirements of the model general assembly diagrams.
(Refer Section 27).
The compressor must be placed on a flat surface and it must remain level at
all times. Packing shims should be used to level the compressor. The unit
must not be securely bolted down. When the need exists location pins should
be used.
IMPORTANT: Locate the compressor in an adequately ventilated area. Hot
air from the discharge duct must not recirculate to the air intake. Do not install
in an area where exhaust fumes from other equipment can be drawn into the
intake (or other toxic, noxious or corrosive fumes, chemicals or substances).
Where more than one compressor is installed in one location, not only must
proper care be taken with regard to access to each individual machine, but
special attention should be taken to ensure that there is no possibility of the
heated cooling air discharge from any one machine being directed into the
intake of another machine.
7.2 Connection To Air System
The compressor is supplied with either a 3/4” Gate valve (Ci 40/55) or 1” Gate
Valve (Ci 75/110) loose for installation into to ends of the compressor’s air
receiver. The connecting plant airline connection should be at least the size
of the prescribed gate valve, and if the pipe run is of any great length, the pipe
sizes should be increased by one size to minimise any pressure drop.
Note: In base mount option configuration, the pressure switch is
supplied loose (on a 2m fly lead). This must be fitted into the air supply
to provide a control signal for correct compressor operation.

Champion Compressors Ltd. Manual No. 975203 Rev H
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7.3 Electrical Connection
The electrical installation must be checked by a licensed electrician to ensure
that it is adequate for starting and running the compressor. Refer to Section 6
- ‘Technical Data’.
NEUTRAL CONNECTION IS REQUIRED ON SOME MODELS.
Champion Compressors has provided a circuit diagram at the rear of this
operator’s manual.
7.3.1 Ci 40 - 75 (Stop / start control)
All the mains supply leads connect to the compressor within the cover of the
combination pressure switch and starter. There is connection for 3 phases,
earth and neutral. Note: The neutral connection is made on the shunt
relay contact block (located inside pressure switch cover), at terminal
‘C1’ marked on the relay. Please refer to circuit diagram supplied with your
machine.
Note:- A No-Neutral option is available for your compressor. Please contact
Champion Compressor’s customer support department for assistance.
Fig. 1 - Electrical Connection Ci 75 (Stop / Start Control)

Champion Compressors Ltd. Manual No. 975203 Rev H
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7.3.2 Ci 75 / 110 (Star-delta, CSU)
The main supply leads connect to the compressor through conduit entry
points on both the cabinet panels and electrical enclosure. The three phase
wires connect directly to terminals marked. Connection of the earth wire
should be bolted to the starter enclosure using the M6 earthing bolt provided.
Please refer to the circuit diagram supplied with your machine.
Fig. 2 - Electrical Connection - Ci75SD - 110
7.3.3 Motor Rotation Direction
The power supply must be correctly connected for the motor to rotate in the
correct direction. This can be checked by toggling the Off/Auto switch located
on the pressure switch / starter (Stop / Start) or the compressor lid (Star-
Delta, CSU). Note that if your machine is fitted with an auto restart facility,
there may be a delay of up to 30 seconds after toggling the Off/Auto switch.
The motor and airend rotate in the direction indicated by the arrow marked ‘D’
on the airend and motor fan cowling (anti-clockwise viewed from drive shaft
end). In the event that the motor has been disconnected or removed for
service reasons, ensure that the power supply is reconnected in the correct
sequence prior to start-up.
Change incoming power leads only. Refer to Work instruction Q36-34a
for correct wiring sequence.
WARNING: Rotation in the wrong direction will damage the airend and
will void warranty.

Champion Compressors Ltd. Manual No. 975203 Rev H
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7.4 Mechanical Checks
WARNING: Ensure that the machine is electrically isolated before
checks are made.
7.4.1 Airend Check
Ensure that the airend is not hydro-locked by rotating the driven pulley by
hand through two complete revolutions.
7.4.2 Oil Level Check
Sight glasses are used to check both dynamic and static oil levels on these
models. The upper sight glass is used to check the static oil level, whilst the
lower sight glass is used to check the dynamic level.
Top-ups: Add prescribed grade of oil. Ensure that the oil filler cap is firmly
secured and seated properly on the seal, do not over tension.
7.4.3 Vee Belt Check
Pulley alignment must be checked by using a straight edge to confirm that the
pulley faces are flush, and drive shafts parallel. The maximum misalignment
allowable is 0.5mm.
Check that all belts are seated in their grooves. The belt tension is
maintained by sliding the motor, via adjusting jacking bolts located at the feet
of the motor. Correct belt tension is achieved with the use of a Tensiometer
(Champion Part No. 270965). Refer to Figure 3. Set the large o-ring so that
the o-ring bottom is at the 7mm mark. Ensure that the small o-ring is set at
the zero mark. Hold the top of the Tensiometer and press it at right angles to
the belts, midway between the airend pulley and motor pulley into one of the
v-belts. When the bottom of the large o-ring is level with the top of the other
belts stop pressing it in and read the kilogram figure off the bottom of the
small o-ring. Move the small o-ring back to the zero mark and repeat the
operation for the other belts. Record the results.
Rotate the motor pulley through one complete revolution and measure the
belts again, recording the results. Once again rotate the motor pulley and
take another set of readings. Average three sets of readings to ascertain a
belt tension figure.

Champion Compressors Ltd. Manual No. 975203 Rev H
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The belt tension must be adjusted between the minimum, maximum and initial
values (1.3 x Maximum) listed in the table below:
Model Minimum Maximum Initial
Ci 40 1.3 kg 1.8 kg 2.3 kg
Ci 55 1.4 kg 2.0 kg 2.6 kg
Ci 75 1.5 kg 2.1 kg 2.7 kg
Ci 110 1.9 kg 2.7 kg 3.6 kg
New belts should be initially tensioned to 1.3 times the maximum running
tension settings outlined above. Belt tension needs to be adjusted five
minutes after these belts are fitted and the compressor is run, then again ten
minutes later. This will ensure that the belts have completed their initial
“stretch”. After this first fifteen minutes of operation, the belts should be
correctly tensioned to the table above.
Fig. 3 - Belt Tensiometer Part Number 270965
7.4.4 System Isolating Gate Valve Check
Check that the isolating gate valve fitted to the compressor is open.