background image

© 2021, Gast Manufacturing

We reserve the right to make any alterations which may be due to any technical improvements

Printed in the USA

4

Part No. 70-7100 (Rev. A)

MOUNTING

This product can be installed on a horizontal surface . Mounting 
the product to a stable, rigid operating surface and using 
supplied shock mounts will reduce noise and vibration . This 
product is provided with vibration mounts and adjustable 
mounting foot . To adjust mounting pattern, loosen vibration 
mounts to and slide mounting bracket to desired location . Secure 
vibration mounts to body and mounting bracket before attaching 
compressor to application .

Optional mounting orientation is available. Consult Factory or 
Distributor for details.

PLUMBING

Remove plugs from the IN and OUT ports . Connect with pipe 
and fittings that are the same size or larger than the product’s 
threaded ports . Be sure to connect the intake and exhaust 
plumbing to the correct inlet and outlet ports . Ports will not 
support plumbing .

ACCESSORIES

The product’s external intake and exhaust muffler will provide 
adequate filtration in most applications . Check filters periodically 
and replace when necessary . Consult your Gast Distributor/ 
Representative for additional filter recommendations . 
Install relief valves and gauges at inlet or outlet or both, to 
monitor performance . Check valves may be required to prevent 
back streaming through the pump . 
  

MOTOR CONTROL

It is your responsibility to contact a qualified electrician 
and assure that the electrical installation is adequate and in 
conformance with all national and local codes and ordinances. 
The metal capacitor must be grounded. 

Determine the correct overload setting required to protect the 
motor (see motor starter manufacturer’s recommendations) . 
Select fuses, motor protective switches or thermal protective 
switches to provide protection . Fuses act as short circuit 
protection for the motor, not as protection against overload . 
Incoming line fuses must be able to withstand the motor’s 
starting current . Motor starters with thermal magnetic overload 
or circuit breakers protect motor from overload or reduced 
voltage conditions . 
The wiring diagram supplied with the product provides required 
electrical information . Check that power source is correct to 
properly operate the dual-voltage motors .

WARNING

Electrical Shock Hazard

This product must be properly grounded.
Do not modify the plug provided. If it will not fit the outlet,

have the proper outlet installed by a qualified electrician.
If repair or replacement of the cord or plug is necessary,

do not connect the grounding wire to either flat blade

terminal. The wire with insulation that is green or 

green with yellow stripes is the grounding wire.
Check the condition of the power supply wiring.
Do not permanently connect this product to wiring that

is not in good condition or is inadequate for the 

requirements of this product.
Failure to follow these instructions can result in death, fire, 

or electrical shock.

grounding pin

220/240-volt grounded

connectors will differ in shape.

Model with a Power Supply Cord

This product must be grounded . For 220/240-volt circuits 
connect power supply cord grounding plug to a matching 
grounded outlet . Do not use an adapter . (See above diagram .) 
In the event of an electrical short circuit, grounding reduces the 
risk of electric shock by providing an escape wire for the electric 
current . This product may be equipped with a power supply cord 
having a grounding wire with an appropriate grounding plug .
The plug must be plugged into an outlet that is properly installed 
and grounded in accordance with all local codes and ordinances 

Check with a qualified electrician or serviceman if the 
grounding instructions are not completely understood, or if you 
are not sure whether the product is properly grounded. Do not 
modify the plug provided. If it will not fit the outlet, have the 
proper outlet installed by a qualified electrician. 

Summary of Contents for 120R

Page 1: ...t Manufacturing Inc Copyright 2021 Gast Manufacturing Inc All Rights Reserved www gastmfg com ISO 9001 CERTIFIED A UNIT OF IDEX CORPORATION Part No 70 7100 Rev A Operation and Maintenance Manual 120R...

Page 2: ...safety instructions and you will receive years of trouble free service TABLE OF CONTENTS Product Use Criteria and Purpose 3 Mounting 4 Plumbing 4 Accessories 4 Motor Control 4 Electrical Connection 4...

Page 3: ...es This is the safety alert symbol This symbol alerts you to hazards that can kill or hurt you and others The safety alert symbol and the words DANGER and WARNING will precede all safety messages Thes...

Page 4: ...ircuit protection for the motor not as protection against overload Incoming line fuses must be able to withstand the motor s starting current Motor starters with thermal magnetic overload or circuit b...

Page 5: ...100 200 300 400 500 600 800 1000 0 2 18 18 18 16 16 14 14 12 12 2 3 18 18 16 14 14 12 12 10 10 3 4 18 18 16 14 12 12 10 10 8 4 5 18 18 14 12 12 10 10 8 8 5 6 18 16 14 12 10 10 8 8 8 6 8 18 16 12 10 1...

Page 6: ...ter element Replace filter if element is covered with contamination or shows signs of increasing differential pressure 5 Reinstall filter element and filter cover Check that all external accessories s...

Page 7: ...acement Kit K1029 Five years 120R Capacitor Cover K1030 As needed 120R Spare Parts Kits K1031 As needed 120R Side Mount Bracket Kit K1032 As needed Reducing Bushing 3 8 to 1 4 UK6502 As needed 1 Disco...

Page 8: ...ER 1 5485152 LIMITER 1 6 VPA1501 VALVE PLATE ASSEMBLY 1 VPL1500 VALVE PLATE 1 5485150 LEAF VALVE 2 6392165 PHCS M5 X 0 8 X 8 0 TORX TAPTITE 2 VRP1500 VALVE RETAINER 1 5485152 LIMITER 1 7 BC104 HEX NUT...

Page 9: ...ENANCE CHART Date Problem Technician Notes Low Pressure High Pressure Low Vacuum Excessive Noise Over heating Won t Start Possible reason Dirty filter Dirty muffler Dirty valves clean or replace Bent...

Page 10: ...ence or otherwise Notwithstanding any other provision of this warran ty BUYER S REMEDY AGAINST GAST FOR GOODS SUPPLIED OR FOR NON DELIVERED GOODS OR FAILURE TO FURNISH GOODS WHETHER OR NOT BASED ON NE...

Reviews: