Vanair ADHD Powertech User manual

Vanair ADHD Powertech
125 to 185 CFM
Rotary Screw Air Compressor
Installation, Operation, Maintenance and Parts List Manual
NOTE
Making unauthorized modifications to
the compressor or system components
WILL VOID THE WARRANTY!
Always inform Vanair Manufacturing,
Inc., before beginning any changes to
the ADHD system.
NOTE
Read this manual before installing,
operating or servicing this equipment.
Failure to comply with the operation
and maintenance instructions in this
manual WILL VOID THE
EQUIPMENT WARRANTY.
NOTE
Use only Genuine Vanair Parts.
Inspect and replace damaged
components before operation.
Substituting non-Vanair components
will VOID THE COMPRESSOR
WARRANTY!
Vanair Manufacturing, Inc.
10896 West 300 North
Michigan City, IN 46360
Phone: [phone]
[phone]
Service Fax: [phone]
Parts Fax: [phone]
Sales Fax: [phone]
www.vanair.com
POO280-6
04/13
KEEP THE MANUAL
WITH THE VEHICLE

WARRANTY (Applies to following models: UDSM, UDISS, UDHD, ADHD, GENAIR, TMBD, ADBD)
The rotary screw compressor unit air end is warranted for life when adhering to the prescribed
maintenance schedule. The unit will be replaced or repaired at VANAIR’S option. The hydraulic
motor on the UDHD and ADHD is warranted for two (2) years. All other parts including the
compressor unit shaft seal and generator are warranted for twelve (12) months. This warranty does
not cover damage caused by accident, misuse or negligence. If a compressor unit is disassembled
the warranty is void. Any disassembly of major components must be approved by Vanair to avoid
voiding of warranty. Any and all such claims for warranty consideration must be coordinated through
the Warranty-Service Department at the address below. Do not return parts without prior
authorization.
Warranty is limited to the supply of replacement parts failing within the warranty period. Credit for
labor required to refit replacement parts is NOT included. All warranted parts are to be shipped
PREPAID to VANAIR. Replacement parts will be shipped back to the customer by VANAIR via
ground shipment. Cost to expedite delivery of replacement parts will be incurred by customer.
Factory installed units will also include warranty on the installation for one year.
Warranty will commence upon receipt of the Warranty Registration Card. If the Warranty
Registration Card is not received within six (6) months, then warranty commencement date shall be
thirty (30) days from the date of shipment from VANAIR. Records of warranty adherence are the
responsibility of end user.
This statement of warranty is expressly in lieu of and disclaims all other express warranties, implied
warranties of merchantability and fitness for a particular purchase and all other implied warranties
which extend beyond the description on the face hereof. The warranty does not include incidental or
consequential damages.
This warranty shall be void and VANAIR shall have no responsibility to repair, replace or repay the
purchase price of defective or damaged parts resulting from the use of or repair of replacement parts
or fluids not of VANAIR’S manufacture or from buyer’s failure to store, install, maintain and operate
the compressor according to the recommendations contained in the Manual.
All claims under the Warranty shall be made by contacting VANAIR Warranty-Service Department.
10896 West 300 North
Michigan City, IN 46360
Phone: [phone] • [phone]
Service Fax: [phone] • Parts Fax: [phone] • Sales Fax: [phone]

TABLE OF CONTENTS Pg i
TABLE OF CONTENTS
DESCRIPTION SECTION SECTION-PAGE NO.
Warranty .............................................................................-.............................Behind Cover
Table of Contents ...............................................................-........................................i
Definition of Terms ............................................................-........................................v
Section 1 –Safety .................................................1.0..............................1-1
General ...............................................................................1.1....................................1-1
Parking or Locating Compressor .......................................1.2....................................1-2
Pressure Release .................................................................1.3....................................1-2
Fire and Explosion .............................................................1.4....................................1-3
Moving Parts ......................................................................1.5....................................1-5
Hot Surfaces, Sharp Edges, and Sharp Corners..................1.6....................................1-5
Toxic and Irritating Substances .........................................1.7....................................1-6
Electrical Shock .................................................................1.8....................................1-7
Safety Decals ......................................................................1.9....................................1-7
Section 2 –Description ........................................2.0..............................2-1
Introduction ........................................................................2.1....................................2-1
Sullair® Compressor Unit, Functional Description............2.2....................................2-1
Compressor Cooling and Lubrication, Functional
Description..........................................................................2.3....................................2-2
Compressor Discharge System, Functional
Description..........................................................................2.4....................................2-2
…Continued on next page

TABLE OF CONTENTS Pg ii
DESCRIPTION SECTION SECTION-PAGE NO.
Section 2 –Description (continued)
Control System, Functional Description.............................2.5....................................2-5
Air Inlet System, Functional Description ...........................2.6....................................2-6
Instrument Panel, Functional Description...........................2.7....................................2-7
Hydraulic Motor, Functional Description...........................2.8....................................2-8
Electrical System, Functional Description..........................2.9....................................2-8
Section 3 –Specifications ....................................3.0..............................3-1
Compressor Specifications..................................................3.1....................................3-1
Lubrication Guide –Compressor........................................3.2....................................3-1
Application Guide...............................................................3.3....................................3-2
Section 4 –Operation ..........................................4.0..............................4-1
General ...............................................................................4.1....................................4-1
Purpose of Controls ............................................................4.2....................................4-1
Initial and Routine Start-Up Procedure s............................4.3....................................4-2
Section 5 –Installation ........................................5.0..............................5-1
Hydraulic System Requirements.........................................5.1....................................5-1
Installation ..........................................................................5.2....................................5-1
Receiver Tank Installation...........................................5.2.1...................................5-2
Wiring Diagram ..................................................................5.3....................................5-3
…Continued on next page

TABLE OF CONTENTS Pg iii
DESCRIPTION SECTION SECTION-PAGE NO.
Section 5 - Maintenance (continued)
Dimensions Diagram ..........................................................5.4....................................5-4
Section 6 - Maintenance ......................................6.0..............................6-1
General ...............................................................................6.1....................................6-1
Daily Operation ..................................................................6.2....................................6-1
Maintenance after Initial 50 Hours of Operation................6.3....................................6-1
Every 500 Hours or Yearly, Whichever Comes First.........6.4....................................6-2
Parts Replacement and Adjustment Procedures .................6.5....................................6-2
Compressor Oil Change and Filter Replacement
Procedure ..................................................................6.5.1...................................6-2
Compressor Oil Change Procedure..................................6.5.1.1.................................6-2
Compressor Oil Filter Element Replacement..................6.5.1.2.................................6-3
Air Filter Maintenance.......................................................6.5.2...................................6-4
Air Filter Element Replacement ......................................6.5.2.1.................................6-5
Air Filter Element Cleaning.............................................6.5.2.2.................................6-5
Cleaning the Air Filter Element with
Compressed Air ...............................................................6.5.2.3.................................6-6
Air Filter Element Inspection...........................................6.5.2.4.................................6-6
Separation Element Replacement......................................6.5.3...................................6-6
Section 7 - Troubleshooting ................................7.0..............................7-1
Troubleshooting..................................................................7.1....................................7-1
Troubleshooting Guide ......................................................7.2....................................7-1
…Continued on next page

TABLE OF CONTENTS Pg iv
DESCRIPTION SECTION SECTION-PAGE NO.
Section 8 –Illustrations and Parts List ..............8.0..............................8-1
Procedure for Ordering Parts .............................................8.1....................................8-1
Discharge System ...............................................................8.2....................................8-2
Enclosure ............................................................................8.3....................................8-4
Instrument Panel ................................................................8.4....................................8-6
Inlet Valve Assembly .........................................................8.5....................................8-8
Oil Cooling System (electric) 125-185 CFM......................8.6...................................8-10
Above Deck –Compressor, Air Inlet and Parts .................8.7...................................8-12
Above Deck –Hydraulic Drive .........................................8.8...................................8-14
Decal Locations –1 of 2 ...................................................8.9A..................................8-16
Decal Locations –2 of 2....................................................8.9B..................................8-17
Installation/Test Record........................................................-.....................................8-19

DEFINITION OF TERMS Pg v
DEFINITION OF TERMS
AD Abovedeck
ADBD Abovedeck Belt Drive
ADHD Abovedeck Hydraulic Drive
ASME American Society of Mechanical Engineers
BD Belt Drive
CA Cab to axle Length
CFM Cubic Feet per Minute
EC Electric Cooled
FC Front Cooled
GAWR Gross Axle Weight Rating
GPM Gallons per Minute
GVWR Gross Vehicle Weight Rating
HC Hydraulic Cooled
HD Hydraulic Drive
ICFM Inlet Cubic Feet per Minute
PSI Pounds per Square Inch
PSIG Pounds per Square Inch Gauge
PTO Power Take Off
RPM Revolutions per Minute
SCFM Standard Cubic Feet per Minute
SM Side Mount
TM Tractor Mount
TMBD Tractor Mount Belt Drive
UD Underdeck
UDHD Underdeck Hydraulic Drive
UDISS Underdeck Integral Split-Shaft
UDSM Underdeck Side Mount
WB Wheel Base

BLANK PAGE

SAFETY Section 1 - Pg 01
SECTION 1:
SAFETY
1.1 General
Vanair®Manufacturing designs and manufactures all of its products so they can be
operated safely. However, the responsibility for safe operation rests with those who use
and maintain these products. The following safety precautions are offered as a guide
which, if conscientiously followed, will minimize the possibility of accidents through the
useful life of this equipment.
The air compressor should be operated only by those who have been trained and
delegated to do so, and who have read and understood this Operator’s Manual. Failure to
follow the instructions, procedures and safety precautions in this manual can result in
accidents and injuries.
NEVER start the air compressor unless it is safe to do so DO NOT attempt to operate the
air compressor with a known unsafe condition. Tag the air compressor and render it
inoperative by disconnecting the battery so others who may not know of the unsafe
condition will not attempt to operate it until the condition is corrected.
Use and operate the air compressor only in full compliance with all pertinent OSHA
requirements and/or all pertinent Federal, State and Local codes or requirements.
DO NOT modify the compressor except with written factory approval.
Each day walk around the air compressor and inspect for leaks, loose or missing parts,
damaged parts or parts out of adjustment. Perform all recommended daily maintenance.
Inspect for torn, frayed, blistered or otherwise deteriorated and degraded hoses. Replace
as required.
NOTE: Estimated hose life based on a 5-day 8-hour work week is 3 years. These
conditions exist on an 8-hour shift only. Any other operation of the equipment other than
8-hour shifts would deteriorate the hose life based on hours of operation.

SAFETY Section 1 - Pg 02
1.2 Parking or Locating Compressor
1. Park or locate compressor on a level surface, if possible. If not, park or locate
compressor across grade so the compressor does not tend to roll downhill. DO NOT
park or locate compressor on grades exceeding 15° (27%).
2. Make sure compressor is parked or located on a firm surface that can support its
weight.
3. Park or locate compressor so the wind, if any, tends to carry the exhaust fumes and
radiator heat away from the compressor air inlet openings, and also where the
compressor will not be exposed to excessive dust from the work site.
4. Block or chock both sides of wheels.
1.3 Pressure Release
A. Open the pressure relief valve at least weekly to make sure it is not blocked, closed,
obstructed or otherwise disabled.
B. Install an appropriate flow-limiting valve between the compressor service air outlet
and the shutoff (throttle) valve, when an air hose exceeding 1/2" (13mm) inside
diameter is to be connected to shut-off (throttle) valve, to reduce pressure in case of
failure, per OSHA Standard 20 CFR 1926.302 (b) (7) or any applicable Federal, State
and local codes, standards and regulations.
C. When the hose is to be used to supply a manifold, install an additional appropriate
flow limiting valve between the manifold and each air hose exceeding 1/2" (13mm)
inside diameter that is to be connected to the manifold to reduce pressure in case of
hose failure.
D. Provide an appropriate flow-limiting valve for each additional 75 feet (23 meters) of
hose in runs of air hose exceeding 1/2" (13mm) inside diameter to reduce pressure in
case of hose failure.
E. Flow-limiting valves are listed by pipe size and rated CFM. Select appropriate valve
accordingly.
F. DO NOT use tools that are rated below the maximum rating of this compressor.
Select tools, air hoses, pipes, valves, filters and other fittings accordingly. DO NOT
exceed manufacturer’s rated safe operating pressures for these items.

SAFETY Section 1 - Pg 03
1.3 Pressure Release - Continued
G. Secure all hose connections by wire, chain or other suitable retaining device to
prevent tools or hose ends from being accidentally disconnected and expelled.
H. Open fluid filler cap only when compressor is not running and is not pressurized.
Shut down the compressor and bleed the sump (receiver) to zero internal pressure
before removing the cap.
I. Vent all internal pressure prior to opening any line, fitting, hose, valve, drain plug,
connection or other component, such as filters and line oilers, and before attempting
to refill optional air line anti-icer systems with antifreeze compound.
J. Keep personnel out of line with and away from the discharge opening of hoses, tools
or other points of compressed air discharge.
K. DO NOT use air at pressures higher than 30 psig (2.1 bar) for cleaning purposes, and
then only with effective chip guarding and personal protective equipment per OSHA
Standard 29 CFR 1910.242 (b) or any applicable Federal, State and Local codes,
standards and regulations.
L. DO NOT engage in horseplay with air hoses as death or serious injury may result.
M. This equipment is supplied with an ASME designed pressure vessel protected by an
ASME rated relief valve. Lift the handle once a week to make sure the valve is
functional. DO NOT lift the handle while machine is under pressure.
N. If the machine is installed in an enclosed area it is necessary to vent the relief valve to
the outside of the structure or to an area of non-exposure.
O. If a manual blowdown valve is provided on the receiver, open the valve to insure all
internal pressure has been vented prior to servicing any pressurized component of the
compressor air/fluid system.
1.4 Fire and Explosion
A. Refuel at a service station or from a fuel tank designed for its intended purpose. If
this is not possible, ground the compressor to the dispenser prior to refueling.
B. Clean up spills of fuel, fluid, battery electrolyte or coolant immediately if such spills
occur.

SAFETY Section 1 - Pg 04
1.4 Fire and Explosion - Continued
C. Shut off air compressor and allow it to cool. Keep sparks, flames and other sources
of ignition away. DO NOT permit smoking in the vicinity when adding fuel,
checking or adding electrolyte to batteries, checking or adding fluid, checking diesel
engine ether starting aid systems, replacing cylinders, or when refilling air line anti-
icer systems antifreeze compound.
D. DO NOT permit liquids, including air line anti-icer system antifreeze compound or
fluid film to accumulate on bottom covers or on any external or internal surfaces of
the air compressor. Wipe down using an aqueous industrial cleaner or steam clean as
required. DO NOT use flammable solvents for cleaning purposes.
E. Disconnect the grounded (negative) battery connection prior to attempting any repairs
or cleaning inside the enclosure. Tag the battery connections so others will not
unexpectedly reconnect it.
F. Keep electrical wiring, including the battery terminals and other terminals, in good
condition. Replace any wiring that has cracked, cut, abraded or otherwise degraded
insulation, or terminals that are worn, discolored or corroded. Keep all terminals
clean and tight.
G. Turn off battery charger before making or breaking connections to the battery.
H. Keep grounded conductive objects (such as tools) away from exposed live electrical
parts (such as terminals) to avoid arcing, which might serve as a source of ignition.
I. Keep a suitable fully charged class BC or ABC fire extinguisher or extinguishers
nearby when servicing and operating the compressor.
J. Keep oily rags, trash, leaves, litter or other combustibles out of and away from the
compressor.
K. DO NOT operate compressor under low overhanging leaves or permit such leaves to
contact hot exhaust system surfaces when operating the compressor in forested areas.
L. DO NOT spray ether into compressor air filter or into an air filter that serves the
compressor as serious damage to the compressor or personal injury may result.
M. Antifreeze compound used in air line anti-icer systems contains methanol which is
flammable. Use systems and refill with compound only in well-ventilated areas away
from heat, open flames or sparks. DO NOT expose any part of these systems or
antifreeze compound to temperatures above 150°F (66°C). Vapors from the
antifreeze compound are heavier than air. DO NOT store compound or discharge
treated air in confined or unventilated areas. DO NOT store containers or antifreeze
compound in direct sunlight.

SAFETY Section 1 - Pg 05
1.4 Fire and Explosion –Continued
N. Store flammable fluids and materials away from your work area. Know where fire
extinguishers are and how to use them, and for what type of fire they are intended.
Check readiness of fire suppression systems and detectors if so equipped.
1.5 Moving Parts
A. Keep hands, arms and other parts of the body and also clothing away from belts,
pulleys and other moving parts.
B. DO NOT attempt to operate the compressor with the fan or other guards removed.
C. Wear snug-fitting clothing and confine long hair when working around this
compressor, especially when exposed to hot or moving parts inside the enclosure.
D. Make sure all personnel are out of and clear of the compressor prior to attempting to
start or operate it.
E. Disconnect the grounded negative battery connection to prevent accidental engine
operation prior to attempting repairs or adjustments. Tag the battery connection so
others will not unexpectedly reconnect it.
F. When adjusting the controls, it may require operation of the equipment during
adjustment. DO NOT come in contact with any moving parts while adjusting the
control regulator and setting the engine RPM. Make all other adjustments with the
engine shut off. When necessary, make adjustment, other than setting control
regulator and engine RPM, with the engine shut off. If necessary, start the engine and
check adjustment. If adjustment is incorrect, shut engine off, readjust, then restart the
engine to recheck adjustment.
G. Keep hands, feet, floors, controls and walking surfaces clean and free of fluid, water,
antifreeze or other liquids to minimize possibility of slips and falls.
1.6 Hot Surfaces, Sharp Edges and Sharp Corners
A. Avoid bodily contact with hot fluid, hot coolant, hot surfaces and sharp edges and
corners.
B. Keep all parts of the body away from all points of air discharge and away from hot
exhaust gases.
C. Wear personal protective equipment including gloves and head covering when
working in, on or around the compressor.

SAFETY Section 1 - Pg 06
1.6 Hot Surfaces, Sharp Edges and Sharp Corners –Continued
D. Keep a first aid kit handy. Seek medical assistance promptly in case of injury. DO
NOT ignore small cuts and burns as they may lead to infection.
1.7 Toxic and Irritating Substances
A. DO NOT use air from this compressor for respiration (breathing) except in full
compliance with OSHA Standards 29 CFR 1920 and any other Federal, State or Local
codes or regulations.
DANGER: Death or serious injury may occur from inhaling compressed air
without using proper safety equipment. See OSHA standards, and/or any
Federal, State or local codes or regulations on safety equipment.
B. DO NOT use air line anti-icer systems in air lines supplying respirators or other
breathing air utilization equipment and DO NOT discharge air from these systems
into unventilated or other confined areas.
C. Operate the compressor only in open or well-ventilated areas.
D. If the compressor is operated indoors, discharge engine exhaust fumes outdoors.
E. Locate the compressor so that exhaust fumes are not apt to be carried towards
personnel, air intakes servicing personnel areas or towards the air intake of any
portable or stationary compressor.
F. Fuels, fluids, coolants, lubricants and battery electrolyte used in the compressor are
typical of the industry. Care should be taken to avoid accidental ingestion and/or skin
contact. In the event of ingestion seek medical treatment promptly. DO NOT induce
vomiting if fuel is ingested. Wash with soap and water in the event of skin contact.
G. If ethyl ether or air line anti-icer system anti-freeze compound enters the eyes or if
fumes irritate the eyes, they should be washed with large quantities of clean water for
15 minutes. A physician, preferably any eye specialist, should be contacted
immediately.
H. DO NOT store ether cylinders or air line anti-icer system antifreeze compound in
operator’s cabs or in other similar confined areas.
I. The antifreeze compound used in air line anti-icer systems contains methanol and is
toxic, harmful or fatal if swallowed. Avoid contact with the skin or eyes and avoid
breathing the fumes. If swallowed, induce vomiting by administering a tablespoon of
salt in each glass of clean warm water until vomit is clear, then administer two
tablespoons of baking soda in a glass of clean water. Have patient lie down and cover
eyes to exclude light. Call a physician immediately.

SAFETY Section 1 - Pg 07
1.8 Electrical Shock
A. Keep the vehicle or equipment carrier, compressor hoses, tools and all personnel at
least 10 feet (3 meters) from power lines and buried cables.
B. Keep all parts of the body and any hand-held tools or other conductive objects away
from exposed live parts of electrical system. Maintain dry footing, stand on
insulating surfaces and DO NOT contact any other portion of the compressor when
making adjustments or repairs to exposed live parts of the electrical system.
C. Attempt repairs only in clean, dry and well-lighted and ventilated areas.
D. Stay clear of the compressor during electrical storms! It can attract lightning.
1.9 Safety Decals
Safety decals are placed onto, or located near, system components that can present a
hazard to operators or service personnel. All pertinent decals listed in Section 8.8, Decal
Locations are located near a component, which is subject to respect in terms of safety
precautions.
A. Always heed the information noted on the safety decals.
WARNING - DO NOT REMOVE OR COVER ANY SAFETY DECAL.
Replace any safety decal that becomes damaged or illegible.

BLANK PAGE

DESCRIPTION Section 2 - Pg 01
SECTION 2:
DESCRIPTION
2.1 Introduction
The Vanair®85 through 185 Hydraulic Driven Air Compressors offer superior
performance and reliability while requiring very minimal maintenance.
Your compressor is equipped with a Sullair rotary screw compressor unit. Compared to
other compressors, the Sullair is unique for its mechanical reliability, performance and
durability. The compressor never needs any inspection of the internal parts.
As you continue reading this manual and learn how the compressor operates and is
maintained, you will see how surprisingly easy it is to keep a Vanair air compressor in
top operating condition.
Read Section 6 (Maintenance) to keep your compressor in top operating condition.
Should any problem or question arise which cannot be answered in this text, contact your
nearest Vanair representative or the Vanair Manufacturing Service Department.
2.2 Sullair®Compressor Unit, Functional Description
Vanair compressors feature the Sullair compressor unit, a single-stage, positive
displacement, fluid lubricated-type compressor. This unit provides continuous pulse-free
compression to meet your needs. With a Sullair compressor, no maintenance or
inspection of the internal parts of the compressor unit is permitted in accordance with the
warranty.
Fluid is injected into the compressor unit and mixes directly with the air as the rotors turn
compressing the air. The fluid has three functions:
1. As coolant, it controls the rise of air temperature normally associated with the heat of
compression.
2. Seals the leakage paths between the rotors and the stator and also between the rotors
themselves.
3. Acts as a lubricating film between the rotors allowing one rotor to directly drive the
other, which is an idler.
After the air/fluid mixture is discharged from the compressor unit, the fluid is separated
from the air. At this time, the air flows to your service line and the fluid is cooled in
preparation for re-injection.

DESCRIPTION Section 2 - Pg 02
2.3 Compressor Cooling and Lubrication System, Functional Description
Refer to Figure 2-1. The compressor cooling and lubrication system is designed to
provide adequate lubrication as well as maintain the proper operating temperature of the
compressor. In addition to the cooler and fan, the system consists of an oil filter, electric
fan switch.
The fluid in the system is used as both coolant and lubricant. It is housed in the
receiver/sump or sump (which will be referred to as the SUMP from hereon).
The cooler is a radiator-type that works in conjunction with an electric driven fan and
electric fan switch. The fan draws air across the cooler core removing the heat of
compression from the fluid. The fluid flows from the sump thru the oil filter, thru the
cooler core, and then is injected into the compressor chamber and bearings of the
compressor. Once the oil reaches approximately 165°F the fan switch will turn on the
fan to cool the oil.
The oil filter has a replaceable spin-on element and a built-in bypass valve which allows
the fluid to flow even when the filter element becomes plugged and requires changing or
when the viscosity of the fluid is too high for adequate flow. After the fluid is properly
filtered, it then flows on to the compressor unit where it lubricates, seals and cools the
compression chamber as well as lubricates the bearings and gears.
2.4 Compressor Discharge System, Functional Description
Refer to Figure 2-1. The Sullair compressor unit discharges compressed air/fluid
mixture. The air fluid mixture is directed to the combination sump. The sump has three
functions:
1. It acts as a primary fluid separation system.
2. Serves as the compressor fluid sump.
3. Houses the air/fluid separator.
The compressed air/fluid mixture enters the sump and is directed off the bottom of the
separator element. By change of direction and reduction of velocity, larger droplets of
fluid separate and fall to the bottom of the sump. The fractional percentage of fluid
remaining in the compressed air collects on the surface of the final separator element as
the compressed air flows through the separator. As more and more fluid collects the
element’s surface, the fluid descends to the bottom of the separator. A return line (or
scavenge tube) leads from the bottom of the separator element to the inlet region of the
compressor unit. Fluid collecting on the bottom of the separator element is returned to
the compressor by the pressure difference between the area surrounding the separator
element and the compressor inlet. A filter orifice and sight glass assembly is included on
this return line to help assure proper flow.

DESCRIPTION Section 2 - Pg 03
Figure 2-1: Compressor Discharge and Cooling and Lubrication System

DESCRIPTION Section 2 - Pg 04
2.4 Compressor Discharge System, Functional Description - Continued
The sump is ASME code rated at 175 psig working pressure. A minimum
pressure/orifice valve, located downstream from the separator, helps assure a minimum
receiver pressure of 65 psig during all conditions. This pressure is necessary for proper
air/fluid separation and proper fluid circulation.
An optional check valve at the outlet of the receiver can be installed to prevent
compressed air in the service line from bleeding back into the receiver on shutdown when
the compressor is being run in parallel with other compressors tied to a large air system.
A pressure relief valve (located on the wet side of the separator) is set to open if the sump
pressure exceeds 175 psig. A temperature switch will shut down the compressor if the
discharge temperature reaches 240°F.
Fluid is added to the sump via a capped fluid fill port (Figure 2-2). A glass fluid level
gauge enables the operator to visually monitor the sump fluid level.
WARNING: DO NOT remove caps, plugs, and/or other components when
compressor is running or pressurized. Stop compressor and relieve all internal pressure
before doing so.
OIL FILL PORT
OIL FILL SIGH T GLASS
Figure 2-2: Oil Fill Port and Sight Glass