Product Manual

ManualsBrandsSchulz ManualsStationaryV-Series 20120HWV80X-3 20-HP 120-Gallon Two-Stage Air Compressor (208V 3-Phase)

DESCRIPTION OF OPERATION

Tank Drain Valve

Intake Air Filter

ON / OFF Switch

Pressure Gauge

SHUT OFF Valve

Cooling System

- This valve, also known as a petcock, is to drain out any condensation in the tank. Since some moisture

will form inside the tank every time the compressor runs, it is important to drain the tank daily.

- As air is drawn into the compressor pump it must pass through a filter to remove dirt and dust. When the

filter element becomes clogged with dirt it creates a high vacuum condition in the cylinder which can cause the oil from the

crankcase to be sucked up past he rings and into the tank.

- Starts and stops the air compressor.It is important to remember that in the “On” position, the compressor

can start automa ically. The compressor should not be turned off in mid-cycle using the switch (except in an emergency) so

hat the pressure switch is allowed to relieve the head pressure when it tums off the compressor.

-The pressure gauge reads the air pressure in the tank or air system.

- A ball or gate valve that is installed on the tank where the air is going out to the shop air system. This

valve is used during scheduled maintenance to separate the compressor from the rest of the air system. It could also be

important to quickly shut offthe air from he tank in case of a problem like an airline breaking.

- Air compressor pumps create remarkable amount of heat as they operate. Because so much heat is

generated, the cooling system of the compressor is critical to the life of the pump. Compressor pumps are heavily finned to

dissipate heat. Cooling air is blown over the fins by the fan blades designed into the flywheel of the pump. The inter cooler

and after cooler lower he air temperature significantly, thereby making it easier to compress the air.

INSTALLATION

Location - The air compressor should be installed in a clean, dry, well lighted, and well ventilated area on a level floor. The

flywheel side of the compressor should be towards the wall and the distance between the compressor and the wall should

be a minimum of 30” to allow for proper cooling air circulation, inspections, and maintenance.

Mounting - Your compressor must be installed according to all applicable State and Local Laws. Shims may be needed to

level the legs. Care must be taken when tightening anchor bolts. Uneven torque can lead to excessive vibration that can

weaken welds and cause explosions.Tighten hree leveled legs equally and leave the fourth nut loose.

WARNING

Under no circumstances a compressor be placed in an area that may be exposed to a

toxic, volatile or corrosive atmosphere nor should toxic, volatile or corrosive agents be

stored near the compressor.

should

AIR COMPRESSOR - OWNER'S MANUAL

SYSTEM COMPONENTS

Pressure Switch

Check Valve

Pressure Relief Valve

- The pressure switch senses the air pressure in the system and automatically starts the motor when he

pressure drops below the cut in setting.

Once the pump builds the pressure up to the maximum or cut out pressure, the pressure switch shuts off the motor and

bleeds down the air pressure between the pump and check valve. This allows the motor to restart in an unloaded mode.

- The check valve is a device that allows the air to flow in only one direction. While the compressor is running,

the check valve is “open”, allowing the air to flow from the pump to the tank. When the compressor stops, the check valve is

“closed” and keeps the air in the tank from trying to back up to the pump.

- This valve is often called a “pop-off” or a “safety relief valve”. Its job is to open up and relieve the air

pressure in the event the pump did not shut off at the maximum setting.

AIR COMPRESSOR - OWNER'S MANUAL

TECHNICAL DATA 20120HWV80X

BARE PUMP PARTS

12 62

35 34 33

32 31 30

28**

37 38 39

ASSEMBLY OF INTERCOOLERS

Upper gasket k t

LP 4 3/4" cylinder

HP 90mm cy inder

HP 2 1/2" cylinder

LP 4 3/4" valve plate kit

HP 90 mm valve plate kit

LP 4 3/4" valve plate

HP 90mm valve plate

HP 2 1/2" valve plate

LP 4 3/4" cylinder cover (with breather)

LP 4 3/4" cylinder cover (without breather)

HP 90mm cy inder cover

HP 2 1/2" cylinder cover

UNC 3/8" x 1 1/2" head bo t

Short intercooler No 2

Medium intercooler No 3

Long intercooler No 4

3/4" nut for intercooler

Intercooler holder

1/4" crankcase breather tube

1/8" x 1/4" straight connection

1/4" ring k t

HP 5/16" x 1 1/2" Allen hex bolt

HP 2 1/2" valve plate kit

Washer kit

M6 x 1 x 55 Allen hex bolt

Connecting rod with needle bearing

Needle bearing

LP 1/8" ASME safety valve

Intercooler kit without tube No 1 (item 66)

Discharge tube No 1

Discharge tube No 5

HP 1/8" ASME safety valve

3/4" x 3/4” straight connection

830 1031 0/NA

709 1306 0

709 1308 0

709 1347 0

830 0955 0

830 1002 0

809 1028 0

809 1027 0

809 1029 0

709 1272 0

709 1423 0

709 1424 0

709 1389 0

709 1457 0

709 1459 0

709 1458 0

21011004

21029003

830 0340 5

003 0054 3

830 0599 8

383 0111 0

830 0957 0

830 1032 0

013 0752 0

830 1202 0

019 0079 0

022 0177 0

809 1043 0

709 1369 0

709 1456 0

022 0215 0

21011002

Flywheel

UNC 1/4" x 3/4" head bolt

Flange cover

Crankcase gasket kit

Oil seal

Lock washer and nut kit

33109 bearing

NC 1/2" x 1" head bolt

Straight fitting

Flange

32211 bearing

Crankshaft kit

Key

UNF 3/8" x 3" head bolt

Crankshaft counter weight

Connecting rod pin kit

Connecting rod

Master connecting rod

Connecting rod inner bushing

Connecting rod bushing

Counter weight with centrifugal mechanism

Counter weight kit with centrifugal mechanism

UNF 5/16" x 1 1/4" Allen head bolt

Crankcase

3/8" plug

3/4" o l level sight kit

Crankcase cover

UNC 5/16" x 3/4" head bolt

3/4" plug

LP 4 3/4" piston

HP 90mm piston kit

HP 2 1/2" piston kit

LP 4 3/4" ring kit

HP 90mm ring kit

HP 2 1/2" ring kit

709 1346 0

20505001

830 1033 0/NA

60082501

830 0932 0

60154502

60259501

20504001

60154501

830 0933 0

60267503

20508005

830 0934 0

30008502

830 0938 0

60152502

60152501

30007007

830 0937 0

20501001

003 0029 2

830 0775 0

709 1316 0

003 0031 4

60273501

830 1000 0

830 0939 0

000 0077 0

000 0080 0

000 0075 0

CODE CODEQTY QTYDENOMINATION DENOMINATION

No. No.

* Part available in the market - not sold by Schulz

Note: HP high pressure LP low pressure

TABLE 1 TORQUE

ESPECIFICATION FOR BOLTS

T10

T11

HP-LP 40-41-59

LP 40-41-59

Position lbf.in

30449

7048

702

15828

1,21512

14161

33414

18523

26458 30

137

2.2

N.m

67 65

6868

** See code page 44

49 58

44**

43**

60 59 41 40

44 43 42

40 41 59

48 47 46 45

T10

T11

ft.lb

5.8

101

27.8

1.6

3.6