Gardner Denver APEXVS7-11A Service manual

13-25-603
Version: 01
June 11, 2013
APEX
VARIABLE SPEED
SINGLE STAGE
BASE- MOUNTED and TANK MOUNTED
COMPRESSORS
AirSmartController
MODELS-APEXVS7-11A
7 and 11 Kw
60HZ
OPERATING AND
SERVICE MANUAL

13-25-603 Page 1
MAINTAIN COMPRESSOR RELIABILITY AND PERFORMANCE WITH
GENUINE GARDNER DENVER® COMPRESSOR PARTS AND SUPPORT SERVICES
Gardner Denver®Compressor genuine parts, manufactured to design tolerances, are developed for optimum
dependability – specifically for Gardner Denver compressor systems. Design and material innovations are the result
of years of experience with hundreds of different compressor applications. Reliability in materials and quality
assurance is incorporated in our genuine replacement parts.
Your authorized Gardner Denver Compressor distributor offers the entire backup you’ll need. An AirSmart™network
of authorized distributors provides the finest product support in the air compressor industry.
Your authorized distributor can support your Gardner Denver air compressor with these services:
1. Trained parts specialists to assist you in selecting the correct replacement parts.
2. Factory warranted new and remanufactured rotary screw airends. Most popular model remanufactured
airends are maintained in stock at the factory, for purchase on an exchange basis with liberal core credit
available for the replacement unit.
3. A full line of factory tested AEON™ compressor lubricants specifically formulated for use in Gardner Denver
compressors.
4. Repair and maintenance kits designed with the necessary parts to simplify servicing your compressor.
Authorized distributor service technicians are factory trained and skilled in compressor maintenance and repair. They
are ready to respond and assist you by providing fast, expert maintenance and repair services.
To Contact Gardner Denver or locate your local distributor:
Visit: www.contactgd.com/compressors
Or
Call: [phone]
INSTRUCTIONS FOR ORDERING REPAIR PARTS
When ordering parts, specify Compressor MODEL, Method of Cooling, HORSEPOWER and SERIAL NUMBER (see
nameplate on unit). The Airend Serial Number is also stamped on top of the discharge bearing carrier casting.
All orders for Parts should be placed with the nearest authorized distributor.
Where NOT specified, quantity of parts required per compressor or unit is one (1); where more than one is required
per unit, quantity is indicated in parenthesis. SPECIFY EXACTLY THE NUMBER OF PARTS REQUIRED.
DO NOT ORDER BY SETS OR GROUPS.
To determine the Right-Hand and Left-Hand side of a compressor, stand at the motor end and look toward the
compressor. Right-Hand and Left- Hand are indicated in parenthesis following the part name, i.e. (RH) and (LH),
when appropriate.

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WARNING – PROHIBITION – MANDATORY LABEL INFORMATION
Gardner Denver Rotary Screw compressors are the result of advanced engineering and skilled
manufacturing. To be assured of receiving maximum service from this machine, the owner must exercise
care in its operation and maintenance. This book is written to give the operator and maintenance
department essential information for day-to-day operation, maintenance and adjustment. Careful
adherence to these instructions will result in economical operation and minimum downtime.
Boxed text formats are used, within this manual, to alert users of the following
conditions:
Safety Labels are used, within this manual and affixed to the appropriate areas of
the compressor package, to alert users of the following conditions:
Indicates a hazard with a high level of risk, which if not avoided, WILL result in death or serious
injury.
Equipment Starts Automatically
Cutting of Finger or Hand Hazard – Rotating
Impeller Blade
Cutting of Finger or Hand Hazard – Rotating Fan
Blade
Health Hazard – Explosive Release of Pressure
High Voltage – Hazard of Shock, Burn, or Death
Present until Electrical Power is Removed
Entanglement of Fingers or Hand/Rotating Shaft

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Indicates a hazard with a medium level of risk which, if not avoided, COULD result in death or
serious injury.
Asphyxiation Hazard – Poisonous Fumes or Toxic Gases in Compressed Air
Indicates a hazard with a low level of risk which, if not avoided, MAY result in a minor or
moderate injury.
Burn Hazard – Hot surface
PROHIBITION/MANDATORY ACTION REQUIREMENTS
Do not Operate Compressor with Guard Removed
Do Not Lift Equipment with Hook – No Lift Point
Handle Package at Forklift Points Only
Lockout Electrical Equipment in De-Energized
State
Loud Noise Hazard – Wear Ear Protection
Read the Operator’s Manual Before Proceeding
with Task

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SAFETY PRECAUTIONS
Safety is everybody’s business and is based on your use of good common sense. All situations or
circumstances cannot always be predicted and covered by established rules. Therefore, use your past
experience, watch out for safety hazards and be cautious. Some general safety precautions are given
below:
Failure to observe these notices will result in injury to or death of personnel.
•Keep fingers and clothing away from rotating fan, drive coupling, etc.
•Disconnect the compressor unit from its power source, lockout and tagout before working on the
unit – this machine is automatically controlled and may start at any time.
•Do not loosen or remove the oil filler plug, drain plugs, covers, the thermostatic mixing valve or
break any connections, etc., in the compressor air or oil system until the unit is shut down and
the air pressure has been relieved.
•Electrical shock can and may be fatal.
•Perform all wiring in accordance with the National Electrical Code (NFPA-70) and any applicable
local electrical codes. Wiring and electrical service must be performed only by qualified
electricians.
•Open main disconnect switch, lockout and tagout and check for voltage before working on the
control.
Failure to observe these notices could result in damage to equipment.
•Stop the unit if any repairs or adjustments on or around the compressor are required.
•Do not use the air discharge from this unit for breathing – not suitable for human consumption.
•An Excess Flow Valve should be on all compressed air supply hoses exceeding 1/2 inch
inside diameter (OSHA Regulation, Section 1926.302).
•Do not exceed the rated maximum pressure values shown on the nameplate.
•Do not operate unit if safety devices are not operating properly. Check periodically. Never
bypass safety devices.

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TABLE OF CONTENTS
Maintain Compressor Reliability And Performance With Genuine Gardner Denver Compressor Parts And
Support Services...........................................................................................................................................1
Instructions For Ordering Repair Parts .........................................................................................................1
Warning – Prohibition – Mandatory Label Information..................................................................................2
Safety Precautions........................................................................................................................................4
Index..............................................................................................................................................................6
List Of Illustrations.........................................................................................................................................8
Section 1, General Information .....................................................................................................................9
Section 2, Installation..................................................................................................................................12
Section 3, Starting & Operating Procedures...............................................................................................19
Section 4, Controls & Instrumentation ........................................................................................................25
Section 5, Lubrication. Oil Cooler, Oil Filter & Separator............................................................................44
Section 6, Air Filter......................................................................................................................................56
Section 7, Belt Drive....................................................................................................................................58
Section 8, Maintenance Schedule ..............................................................................................................63
Section 9, Troubleshooting .........................................................................................................................65
This book covers the following models:
Kw PSIG Air Cooled Parts List Controller Manual Communication
Module
7 and 11 110, 125, 175 APEXVS7-11A 13-25-503 13-17-600 13-17-604

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INDEX
Addition Of Oil Between Changes ...................47
Air Cooled Unit.................................................12
Air Filter
Section 6.......................................................56
Air Filter Cleaning.............................................57
Air Filter Element Life.......................................57
Air Filter, Heavy Duty (Standard).....................56
Air Flow In Compressor System ........................9
Air Inlet Filter....................................................57
Air Receiver
Auxiliary........................................................15
Belt Drive
Replacing Compressor Belts........................58
Replacing Compressor Sheave....................59
Replacing The Airend Sheave......................60
Section 7.......................................................58
Belt Tension
Checking.......................................................58
Cold Weather
Installation.....................................................15
Compression Principle.......................................9
Compressor........................................................9
Compressor Oil Filter .......................................52
Compressor Oil Separator ...............................54
Compressor Oil System Check........................55
Controls & Instrumentation
Control Devices ............................................30
General Description......................................25
Section 4.......................................................25
Conversion Instructions....................................35
Cooling, Sealing And Lubrication.......................9
Daily Check......................................................22
Discharge Service Line....................................16
Electrical Wiring ...............................................17
Enclosure .........................................................14
Filter
Compressor Oil.............................................52
Filter Element...................................................56
Foundation .......................................................13
Gauge
Oil .................................................................48
General Information
Section 1.........................................................9
Grounding.........................................................18
High Temperature Operation ...........................45
Inlet Line...........................................................15
Inlet Screen And Tube .....................................57
Installation
Cold Weather................................................15
General.........................................................12
Section 2 ......................................................12
Lifting Unit........................................................12
Location ...........................................................12
Lubricant
Recommended.............................................44
Lubricant Change Procedure...........................45
Lubrication, Cooling And Sealing.......................9
Lubrication, Oil Cooler, Oil Filter & Separator
Section 5 ......................................................44
Maintenance Schedule
Section 8 ......................................................63
Moisture In The Oil System .............................48
Moisture Separator/Trap
Optional........................................................15
Oil Change Interval..........................................50
Oil Cooler
Compressor..................................................53
Oil Filter
Compressor..................................................52
Oil Reservoir....................................................54
Drain.............................................................13
Filling............................................................51
Oil Separator
Compressor..................................................54
Inspection.....................................................55
Removal For Inspection Or Replacement....55
Oil Specifications .............................................45
Oil System
Compressor..................................................44
Draining And Cleaning .................................51
Oil System Check ............................................55
Air And Oil Discharge Temperature.............55
Compressor Oil Inlet Temperature...............55
Oil Cooler Oil Pressure Differential ..............55
Oil Cooler Temperature Differential .............55
Oil Inlet Pressure..........................................55
Operation
Cold Ambient................................................47
High Temperature ........................................45
Piping
Control..........................................................15
Pressure Differential Separator .......................54
Prestart-Up Instructions...................................19
Air Filter........................................................19
Compressor Oil ............................................19
Electrical.......................................................19
Enclosure .....................................................20
Grounding.....................................................19
Inlet Filter......................................................19
Operating Mode............................................20
Piping ...........................................................19

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Rotation ........................................................20
System Pressure..........................................20
Quick Start Guide.............................................23
Safety Precautions.............................................4
Sealing, Lubrication And Cleaning.....................9
Separator
Compressor Oil.............................................54
Service Check List ...........................................63
Air Filter ........................................................63
Every 1000 Hours Operation........................63
Every 125 Hours Operation..........................63
Every 4000 Hours Operation........................63
Every 8 Hours Operation..............................63
Every Year....................................................63
Motor Lubrication..........................................63
Package Inlet Filter.......................................63
Starting & Operating Procedures
Section 3 ................................................19, 63
Starting The Unit..............................................21
Unit Cold.......................................................21
Unit Hot ........................................................22
Stopping The Unit............................................22
Thermal Control (Thermostatic Mixing) Valve .53
Trouble Shooting
Section 9 ................................................63, 65
Warning – Prohibition – Mandatory Label
Information .....................................................2
Wiring
Electrical.......................................................17

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LIST OF ILLUSTRATIONS
Figure 1-1 – Compressor Cycle....................................................................................................................9
Figure 1-2 – Compressor Illustration...........................................................................................................10
Figure 2-1 – Typical Compressor Room.....................................................................................................13
Figure 2-2 – Air Flow Chart.........................................................................................................................13
Figure 2-3 – Cold Weather Installation .......................................................................................................14
Figure 4-1 - Control Assembly With Variable Frequency Drives ................................................................27
Figure 4-2 - Control Assembly With Variable Frequency Drives 10 & 15 HP (575 Volt)............................28
Figure 4-3 – Control Schematic ..................................................................................................................29
Figure 4-4 – Key Pad..................................................................................................................................30
Figure 4-5 – Inlet Valve...............................................................................................................................32
Figure 4-6 – Wiring Diagram – Variable Speed (200V, 230V & 460V).......................................................36
Figure 4-7 – Wiring Diagram – Variable Speed (575V)..............................................................................40
Figure 5-1 – Flow Diagram – Air/Oil System...............................................................................................44
Figure 5-2 – Approximate Oil System Capacities.......................................................................................47
Figure 5-3 – Dew Point Chart °F.................................................................................................................49
Figure 5-4 – Dew Point Chart °C ................................................................................................................49
Figure 5-5 – Oil Change Interval.................................................................................................................50
Figure 6-1 – Air Filter ..................................................................................................................................56
Figure 7-1 – Removing The Motor Sheave.................................................................................................60
Figure 7-2 – Installing Bushing In Drive Sheave.........................................................................................60
Figure 7-3 – Installing Drive Sheave On Compressor Or Motor.................................................................61
Figure 7-4 – Belt Tension – J Section Micro-V Belts ..................................................................................62

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SECTION 1
GENERAL INFORMATION
Figure 1-1 – COMPRESSOR CYCLE
COMPRESSOR - The rotary screw compressor is a single stage, positive displacement rotary machine
using meshing helical rotors to effect compression. Both rotors are supported between high capacity
roller bearings located outside the compression chamber. Single width cylindrical roller bearings are
used at the inlet end of the rotors to carry part of the radial loads. Ball and roller bearings at the
discharge end locate each rotor axially and carry all thrust loads and the remainder of the radial loads.
COMPRESSION PRINCIPLE (Figure 1-1) - Compression is accomplished by the main and secondary
rotors synchronously meshing in a one-piece cylinder. The main rotor has four (4) helical lobes 90°apart.
The secondary rotor has five (5) matching helical grooves 72°apart to allow meshing with main rotor
lobes.
The air inlet port is located on top of the compressor cylinder near the drive shaft end. The discharge port
is near the bottom at the opposite end of the compressor cylinder. Figure 1-1 is an inverted view to show
inlet and discharge ports. The compression cycle begins as the rotors unmesh at the inlet port and air is
drawn into the cavity between the main rotor lobes and the secondary rotor grooves (A). When the rotors
pass the inlet port cutoff, air is trapped in the interlobe cavity and flows axially with the meshing rotors (B).
As meshing continues, more of the main rotor lobe enters the secondary rotor grove, normal volume is
reduced and pressure increases.
Oil is injected into the cylinder to remove the heat of compression and seal internal clearances. Volume
reduction and pressure increase continues until the air/oil mixture trapped in the interlobe cavity by the
rotors passes the discharge port and is released to the oil reservoir (C). Each rotor cavity follows the
same “fill-compress-discharge” cycle in rapid succession to produce a discharge air flow that is
continuous, smooth and shock free.
AIR FLOW IN THE COMPRESSOR SYSTEM (Figure 5-1, page 44) - Air enters the air filter and passes
through the inlet unloader valve and on into the compression chamber where oil is injected into the air.
After compression, the air/oil mixture passes into the oil reservoir where most of the entrained oil is
removed by velocity change and impingement and drops back into the reservoir. The air and remaining
oil then passes through the air/oil separator. The air then passes through the minimum pressure/check
valve, the aftercooler and the moisture separator and into the plant air lines.
LUBRICATION, COOLING AND SEALING - Oil is forced by air pressure from the oil reservoir through
the oil cooler, thermostatic mixing valve, and oil filter and discharge into the compressor main oil gallery.
A portion of the oil is directed through internal passages to the bearings and shaft oil seal. The balance
of the oil is injected directly into the compression chamber to remove heat of compression, seal internal
clearances and lubricate the rotors.

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Figure 1-2 – COMPRESSOR ILLUSTRATION
303ELA797-B
(Ref. Drawing)
Page 1 of 2

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Figure 1-3 – COMPRESSOR ILLUSTRATION-TANK MOUNTED
303ELA797-B
(Ref. Drawing)
Page 2 of 2

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SECTION 2
INSTALLATION
GENERAL - On receipt of the unit, check for any damage that may have been incurred during transit.
Report any damage or missing parts as soon as possible.
Do not electric weld on the compressor or base; bearings can be damaged by
passing of current.
LIFTING UNIT - Proper lifting and/or transporting methods must be used to prevent damage. Unit may
be moved into location by lift truck.
Lift compressor unit under base only. Do not use other places such as motor,
compressor or discharge manifold piping as lifting points.
The eyebolts or lugs provided on the motor are for lifting the motor only and
should not be used to lift any additional weight. All eyebolts must be securely
tightened. When lifting the motor the lifting angle must not exceed 15 degrees.
Failure to observe this warning may result in damage to equipment or personal
injury.
Compressor, air/oil reservoir, separator chamber and all piping and tubing may
be at high temperature during and after operation.
LOCATION (Figure 2-1, page 13) - The compressor must be installed where it is protected from rain,
snow and freezing temperatures, in a clean, well-lighted, well-ventilated area with ample space all around
for maintenance. Select a location that provides a cool, clean, dry source of air. In some cases it may be
necessary to install the air filter at some distance from the compressor to obtain proper air supply, see
“Inlet Line, page 15 and 16.
AIR-COOLED UNIT - A combination oil/aftercooler is supplied as standard equipment on all air-cooled
units. The air-cooled unit with the standard enclosure requires sufficient flow for the compressor
oil/aftercooling system and electric motor cooling (Figure 1-2, page 10). Air is drawn into the unit through
the base then over the motor and discharged through the cooler. Do not block the air flow to and from the
unit. Allow three and one half (3-1/2) feet to the nearest obstruction on the control box end of the unit.
Allow two (2) feet to the nearest obstruction above and on other sides of unit.

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For continuous efficiency, oil cooler cores must be periodically cleaned with either vacuum or compressed
air. If wet cleaning is required, shield motor and spray on a mild soap solution and flush with clean water.
NOTICE
Coolers are aluminum; do not use any cleaning solution that is not compatible
with aluminum. Use of improper solution may result in damage to the cooler.
Figure 2-1 – TYPICAL COMPRESSOR ROOM
Minimum Air Flow* For Compressor
And Cooling (cubic Feet/Minute)
Air Cooled
All Models
3000 CFM
* 80°F Inlet Air
Figure 2-2 – AIR FLOW CHART
FOUNDATION - The rotary screw compressor requires no special foundation, but should be mounted on
a smooth, solid surface. Whenever possible install the unit near level. Temporary installation may be
made at a maximum 5°angle lengthwise or 5°sidewise. Mounting bolts are not normally required.
However, installation conditions such as piping rigidity, angle of tilt, or danger of shifting from outside
vibration or moving vehicles may require the use of mounting bolts and shims to provide uniform support
for the base. Belt alignment and tension should be checked after installation. (For information on belt
alignment and tension, see SECTION 7, page 58.
OIL RESERVOIR DRAIN - The oil drain is piped from the bottom of the reservoir to the side of the frame.
This drain is approximately 6.5 inches above the floor level, on base mounted package.

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If the compressor unit base is raised above floor level, the space between the
floor and the base bottom must be closed with solid material all around to
prevent recirculation of hot air from the oil cooler end and over temperature
operation.
ENCLOSURE - The compressor, electric motor, oil cooler and aftercooler are mounted inside the
enclosure.
Service panels are provided for maintenance access. Be sure to allow enough space around the unit for
the panels to be removed. Any of the enclosure panels may be removed by opening the latch and lifting it
up slightly.
Do not operate the compressor with the fan and belt guard removed. Exposed
fan and belts may cause injury to personnel.
The enclosure doors and panels must be closed and latched while the
compressor is operating. Failure to close and latch the doors and panels will
cause high temperature shutdowns.
Figure 2-3 – COLD WEATHER INSTALLATION

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INSTALLATION FOR COLD WEATHER OPERATION (Figure 2-3, page14) - It is recommended that the
unit be installed inside a shelter that will be heated to temperatures above freezing (32oF, 0oC). This will
eliminate many of the problems associated with operating units in cold climates, such as freezing in
control lines and downstream of the cooler.
Refer to Engineering Data Sheet 13-9-411 for the advantages of using the heat recovered from rotary
compressors. This heat recovery could easily pay for an adequate shelter for the unit.
When an outside installation must be made, the precautions required will depend on the severity of the
environment. The following are general guidelines for outside installations:
Cold Weather (Down To +10oF)
1. Be sure all drains, traps, and control lines, including pressure transducer lines are heated to avoid
freezing of condensate. Heat tape with thermostat control is generally satisfactory for this purpose
and can be obtained at various local plumbing or hardware outlets at nominal cost.
2. Provisions to bypass the aftercooler must be made. Since cold air contains very little moisture,
successful operation can be achieved without the aftercooler.
3. Provide at least some simple shelter such as a plywood windbreak to protect against drifting snow.
4. Use only Gardner Denver AEON 9000SP lubricant.
5. Monitor unit carefully during start-up and operation to be sure it is functioning normally.
Remember unsheltered (outside) installations should be avoided where possible. Installation next to a
heated building where enough heat can be used to keep the compressor room above freezing will save
many complications in the operation and installation of the unit.
AUXILIARY AIR RECEIVER - An auxiliary air receiver is not required if the piping system is large and
provides sufficient storage capacity to prevent rapid cycling. When used, an air receiver should be of
adequate size, provided with a relief valve of proper setting, a pressure gauge and a means of draining
condensate
STANDARD MOISTURE SEPARATOR/TRAP - The unit is equipped with a built-in aftercooler, a
combination moisture separator and trap piped into the system down stream of the aftercooler.
CONTROL PIPING - Control piping is not necessary since the rotary screw unit is factory wired and piped
for the control system specified.
INLET LINE - Where an inlet line is used between the air filter and the compressor, it must be thoroughly
cleaned on the inside to prevent dirt or scale from entering the compressor. If welded construction is
used, the line must be shot blasted and cleaned to remove welding scale. In either case, the inlet
line must be coated internally by galvanizing or painting with a moisture and oil-proof sealing lacquer. Up
to ten (10) feet in length, the inlet line should be the full size of the inlet opening on the compressor. If an
extra-long line is necessary, the pipe size should be increased according to “Inlet Line Length Chart”,
page 16.
Accessibility for inlet air filter servicing must be considered when relocating the filters from the unit to a
remote location.

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INLET LINE LENGTHS
Length of Inlet Line
Diameter of Pipe Size
0 to 10 Feet.............................................
Same as Compressor Inlet Opening
10 to 17 Feet...........................................
One Size Larger Than Inlet Opening
17 to 38 Feet...........................................
Two Sizes Larger Than Inlet Opening
DISCHARGE SERVICE LINE - The discharge service line connection is made at the left hand corner of
the package when viewed from the control box end. A hand operated valve, (air service valve) must be
installed between the unit and the customer’s air system. If a fast operating valve such as a ball valve is
used, it must be closed slowly to give the intake valve time to shut and keep the discharge pressure from
spiking.
The controller has an automatic start/stop sequence built in. You do NOT need
to close the air service valve. Closing the air service valve on start-up or prior
to shutdown will cause rapid cycling, and could cause a high pressure
shutdown.
When manifolding two or more rotary screw units on the same line, each unit is isolated by the check
valve in the unit discharge line.
If a rotary screw unit is manifolded to another compressor, be sure the other compressor has a check
valve in the line between the machine and the manifold.
If a rotary screw and a reciprocating compressor are manifolded together, an air receiver must be located
between the two units.
Discharge air used for breathing will cause severe injury or death.
Consult filtration specialists for additional filtration and treatment equipment to
meet health and safety standards.

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ELECTRICAL WIRING - The compressor package is (internally) factory wired for use with the voltage
specified on the order; it is only necessary to connect power supply and ground wires to the provided wire
terminal blocks.
Electrical shock can cause injury or death. Open main disconnect switch,
lockout and tagout before working on control box.
Gardner Denver Guidelines for proper wiring, grounding and feed power conditioning - This
compressor package is provided with a variable speed drive (VFD) to control compressor motor. The
indicated Gardner Denver guidelines for proper wiring, grounding, and feed power conditioning must be
followed in order to protect the VFD electronics. Failure to do so will void your warranty.
Electrical Wire Sizing – A certified electrician familiar with National Electric Codes and applicable local
codes shall size the electrical power wires serving the compressor package. Refer to Figure 2-3, for a
summary of maximum package current consumption values.
460 VOLT VS-11 MINIMUM COPPER SUPPLY WIRE RECOMMENDATIONS
Minimum
75ºC wire
Minimum 90ºC
wire
NOTES
Model
Input
Package
Amps
NEC Package
Copper
Wire
Copper Wire
Voltage
(Estimated)
Amps at
30ºC
Sized at
40ºC
Sized at 40ºC
APEXVS7-11
460
28.43
34.18
8
10
The NEC requires that wire sizes be determined by using the appropriate multiplier for the conductor temperature
rating at ambient temperatures other than 30º C and then selecting the wire that has sufficient ampacity, after
correction, to meet the load requirements shown in the "NEC Package Amps @ 30ºC" column above. Wire ampacity
is to be corrected, not "Package Amps”. Additional correction multipliers apply based on more than three
conductors in one conduit. The appropriate installation and use of 75ºC and 90ºC wire is the responsibility of the
electrical professional(s) performing the installation and must be per NEC, local and state regulations as allowed. All
of the above recommended minimum wire sizes are based on all terminal connections being rated at 75ºC minimum
temperature rating and copper wire run lengths of 100 feet or less. Please note that all UL-508A listed control panels
are rated for 40ºC ambient conditions.
Figure 2-4 – PACKAGE MAXIMUM CURRENT CONSUMPTION SUMMARY

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Electrical Wire Routing – Routing of the electrical power wires into the electrical hardware enclosure is
best done through its roof area.
Line Reactor – A line reactor provides conditioning of the electrical power supply to the compressor
package by attenuating noise and fluctuations. It shall be required in your particular application if any of
the following conditions exist:
•Transformer KVA is greater than recommended – see Figure 2-5.
•Line has switched Power Factor correction capacitors.
•Existing line reactor not properly sized – see Figure 2-5.
•Other large loads on the same power feed as the compressor.
GD Model
Volts
VFD HP RATINGS
Max KVA
APEXVS7
400/480
10
250
APEXVS11
400/480
15
250
Figure 2-5 – LINE REACTOR SIZING RECOMMENDATIONS
GROUNDING – Equipment must be properly grounded in accordance with the National Electrical Code
and/or applicable local codes.
Failure to properly ground the compressor package could result in injury or
death. Install ground wiring in accordance with the National Electrical Code
and any applicable local codes.
ELECTRIC MOTOR GREASE RECOMMENDATIONS (-30°TO 50°C)
MANUFACTURER TRADE NAME
CHEVRON SRI #2
SHELL DOLIUM R
EXXON UNIREX #2
EXXON POLYREX
ELECTRIC MOTOR REGREASING INTERVAL
Type of
Service
Typical
Rating
Relubrication Interval
Standard One or Two Shift Operation Up to 150 HP (112 KW) 18 Months
Above 150 HP (112 KW) 12 Months
Severe Continuous Operation Up to 150 HP (112 KW) 9 Months
Above 150 HP (112 KW) 6 Months
Very Severe Dirty Locations, High Ambient
Temperature Up to 150 HP (112 KW) 4 Months
Above 150 HP (112 KW) 2 Months

13-25-603 Page 19
SECTION 3
STARTING & OPERATING PROCEDURES
PRESTART-UP INSTRUCTIONS - A new unit as received from the factory has been prepared for
shipping only. Do not attempt to operate the unit until checked and serviced as follows:
1. Compressor Oil - The oil must be checked before starting the unit and every 8 hours of operation.
For instructions on checking the oil and the proper oil level, refer to “Oil level gauge”, SECTION 5,
page 48.
Do not mix different type oils. Standard Unit is shipped filled with Gardner Denver AEON 4000
lubricant which is suitable for the first 4000 hours under normal operating conditions. Other AEON
lubricants are available. Check the decal on the reservoir to be sure which lubricant is in the
machine.
REPLACE OIL FILTER EVERY 1000 HOURS.
NOTICE
Regular maintenance and replacement at required intervals of the oil filter, air
filter and air/oil separator is necessary to achieve maximum service and
extended drain intervals of AEON 4000 lubricant. Use only genuine Gardner
Denver filters designed and specified for this compressor.
Always stop the unit and release air pressure before removing oil filler plug.
Failure to release pressure may result in personal injury or death.
Air Filter - Inspect the air filter to be sure it is clean and tightly assembled. Refer to SECTION 6, page 56
for complete servicing instructions. Be sure the inlet line, if used, is tight and clean.
2. Package Inlet Filter - Figure 1-2, page 10. Inspect the three package inlet filter to be sure they are
clean. Refer to, page SECTION 6, page 56 for complete servicing instructions
3. Piping – Refer , page 63 “Discharge Service Line” and make sure all piping meets all
recommendations.
4. Electrical - Check the wiring diagrams furnished with the unit to be sure it is properly wired. See
Figure 4-6 thru Figure 4-7 pages 36 thru page 40, for general wiring diagrams and page 63 for
“Electrical Wiring”.
5. Grounding - Unit must be properly grounded according to Section 250 of the National Electrical
Code.