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400C AIR COMPRESSOR INSTALLATION 

(USE CONTENTS OF PARTS PACKAGE #2)

Your Heavy Duty Onboard Air System comes complete with a 400C, 33% duty cycle compressor.  

Please follow the installation instructions that follow to enjoy the best use of your onboard air system.

CAUTION - To reduce risk of electrical shock or electrocution:

-  Do not disassemble the compressor.  Do not attempt repairs or modifications. 

    Refer to qualified service agencies for all service and repairs.

-  Do not use this product in an area where it can fall or be pulled into water or liquids.

-  Do not reach for this product if it has fallen into liquid. 

-  Use this compressor with 12-volt DC systems only.

-  This product should never be left unattended during use.

Guidelines for Selecting Mounting Location:

The selection of proper mounting location for your air compressor will help ensure a long

and trouble free compressor service life. Please pay close attention to the following:

-  Select a FLAT, UPRIGHT & SECURE LOCATION where the compressor can be mounted.

-  To maximize air compressor performance, locate compressor as CLOSE TO THE BATTERY 

  as possible so that length of positive lead wire required is at a minimum. 

-  Choose mounting location that is as cool as possible and away from heat sources. 

-  This compressor is moisture & dust resistant, but NOT WATERPROOF or DUSTPROOF.  Do not mount 

  compressor in locations where the unit is likely to come in contact with water or excessive dirt. 

-  For compressor with remote filter mounting, select compressor’s mounting location where air line can be    

  routed from compressor air inlet to remote inlet air filter.  Make sure that the remote inlet air filter is located    

  in a dry location, away from water.  

-  You will also want to select a compressor mounting location where the leader hose bracket can be mounted  

  to secure the leader hose. 

-  If it is necessary to mount the air compressor further from the battery, such as inside your vehicle or in the    

  bed of your pickup, use a minimum 8 AWG positive lead wire for remote installation.

-  Do not mount compressor near areas where flammable liquids are stored.

-  Use thread sealant for proper fitting installation. Thread tape is not recommended.

  Properly sealed, recommended torque for 1/4" and 3/8" is 16~18 ft. lbs. 

   Recommended torque for 1/8" is 10~11 ft. lbs.

400C Compressor Wiring: (See Figure 2)

1.   Disconnect ground cable from vehicle’s battery.

2.   Temporarily position the air compressor in the location where it will be mounted.

3.   Route ground wire to the negative post of the battery or to an appropriate grounding point and cut ground  

 

wire to length as needed.

4.   Mount the 400C air compressor with the four sets of 13/64" (5 mm) bolts, nuts, washers, and locking  

 

 

washers provided. Use of thread locker is recommended.

5.   NOTE: For Remote Inlet Air Filter Installation, refer to Remote Inlet Air Filter Installation Instructions  

 

 

included in the Remote Inlet Air Filter Pack.

6.   This air compressor comes equipped with a 28" heavy duty heat resistant stainless steel braided leader    

 

hose  with 1/4" fittings. This leader hose is designed to prolong the life of your air line. Do not remove this    

 

leader hose from air compressor.

7.   IMPORTANT: Please note; the leader hose that came with your compressor has a built-in inline check valve  

 

preinstalled. Do not remove inline check valve from leader hose.

8.   Select a proper location to mount leader hose with hose bracket provided. Avoid locations where leader  

 

hose may become tangled with wires and other hoses.

9.   To mount hose bracket, drill holes with 3/16" drill bit and push self–anchoring hose bracket pin into hole.  

 

Route leader hose through hose bracket and secure hose by pressing bracket clamp into locked position.

10.  To remove hose from the hose bracket, simply press down on the hose clamp release tab to release

 

bracket clamp.

11.  Connect compressor’s positive lead wire to the appropriate lead of your pressure switch with relay.

12.  Make sure that your compressor setup is properly fused. The 400C pulls approximately 30 amps of power.

13.  Always locate fuse as close as possible to power source.

14.  Before connecting to power source, check to make sure that all connections are made properly.

15.  Connect and test compressor system by running the compressor for a short time to build up pressure  

 

in your air tank.

16.  Once air pressure reaches preset cut out pressure of your pressure switch, the compressor will shut off.

 

Inspect all air line connections for leaks with soap and water solution. If a leak is detected, the air line may   

 

not be cut squarely or pushed all the way in. Tighten connections if needed.

USER MANUAL

HEAVY DUTY ONBOARD AIR SYSTEM

Summary of Contents for 10005

Page 1: ......

Page 2: ...Components 1 2 5 Gallon 6 port VIAIR Air Tank 1 400C model VIAIR compressor 1 36 ft Length of 1 4 Air Line for accessory and gauge installation 1 35 foot Coil Hose with clip on chuck Please check to make sure that you have four labeled packages in your Onboard Air System kit Each package contains the parts needed for specific areas of onboard air installation and may contain smaller bags within ea...

Page 3: ...E Mounting Bolts 2pcs FF Flat Washers 4pcs GG Locking Washers 2pcs HH Nuts 2pcs II Push on Female Terminals 2pcs JJ 12 gauge Ring Terminal 1pc KK 12 gauge Butt Connectors 2pcs LL Self tapping Screw 1pc Package 3 Pressure Switch Reducer BB Pressure Switch with Relay 110 PSI on 145 PSI off 1pc CC Reducer 1 8 NPT F to 1 4 NPT M 1pc PARTS PACKAGES USER MANUAL HEAVY DUTY ONBOARD AIR SYSTEM Package 1 Ai...

Page 4: ...150 PSI working pressure or less CAUTION DO NOT PRESSURIZE YOUR TANK UNTIL YOU HAVE INSTALLED ALL NECESSARY PORT FITTINGS AND ACCESSORIES Apply sealant to threads of fittings prior to assembly and tighten each part with a wrench Do not over tighten if your port fittings are made from brass since brass threads can be stripped Always release air from tank before servicing WARNING FAILURE TO DRAIN TA...

Page 5: ...e for 1 4 and 3 8 is 16 18 ft lbs Recommended torque for 1 8 is 10 11 ft lbs 400C Compressor Wiring See Figure 2 1 Disconnect ground cable from vehicle s battery 2 Temporarily position the air compressor in the location where it will be mounted 3 Route ground wire to the negative post of the battery or to an appropriate grounding point and cut ground wire to length as needed 4 Mount the 400C air c...

Page 6: ...tenance free motor Never lubricate compressor 6 Repairs should be performed by Manufacturer or Manufacturer s Authorized Service Agencies only CAUTION Never touch the air compressor or fittings connected to the air compressor with bare hands during or immediately after use Leader hose and fittings will become very HOT during and after use 400C Compressor Installation Tips 1 Always use the remote i...

Page 7: ...compression fitting until the air line completely covers the barb Tighten collar onto the body of the compression fitting with a wrench 3 Routing Air Line to Air Source Route the air line tubing on the Dash Panel Gauge to the air source Do not cut air line yet In some cases a hole may need to be drilled to enable the air line to pass through to the air source Make sure that the air line tubing is ...

Page 8: ...air line and electrical wiring 7 Connect to Power Source Before connecting the power wire to a power source check to make sure that the ON OFF switch on the dash panel gauge is in the OFF position Connect the ring terminal of the power wire to power source This is the wire described in Step 4 which is connected to the ON OFF switch of the dash panel gauge 8 Testing Your Onboard Air System Your Onb...

Page 9: ...tank to drain Drain tank more frequently 2 Move compressor to area with less humidity or use air line filter Compressor will not run 1 No power or power switch in OFF position 2 Blown fuse 3 Motor overheats 4 Faulty pressure switch 1 Make sure compressor switch is ON 2 Disconnect compressors from power source replace fuse Refer to Specifications section for correct fuse amperage 3 Let compressors ...

Page 10: ...me a compressor can beoperated in a given time period at 100 PSI and a standard ambient temperature of 72 F It is commonly expressed in percentage format Compressor on time on time off time Duty Cycle ONE HOUR DUTY CYCLE MINUTES ON 100 PSI 72 F MINUTES OFF 9 5 Min On 55 Min Off 10 6 Min On 54 Min Off 15 9 Min On 51 Min Off 20 12 Min On 48 Min Off 25 15 Min On 45 Min Off 30 18 Min On 42 Min Off 33 ...

Page 11: ...ower Source To Lamp Circuit Dash Panel Large Red Small Red White Black Fuse Rev 1 Wiring Diagram Figure 2 USER MANUAL HEAVY DUTY ONBOARD AIR SYSTEM AMERICAN WIRE GAUGE GUIDE 12 VOLT Amp Draw Length of wire from battery to compressor in feet 5 10 15 20 5 16 16 16 14 10 16 14 12 10 15 16 12 10 10 20 14 10 10 8 25 14 10 8 6 30 12 10 8 6 40 12 8 6 6 50 10 6 6 4 60 10 6 4 4 ...

Page 12: ... Manual shall be used reproduced translated converted adapted stored in a retrieval system communicated or transmitted by any means for any commercial purpose including without limitation sale resale license rental or lease without the prior express written consent of VIAIR VIAIR does not make any representations warranties or guarantees express or implied as to the accuracy or completeness of the...

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