VIAIR Heavy Duty OBA - Manual (Page 3)

USER MANUAL
HEAVY DUTY ONBOARD AIR SYSTEM
2.5 GALLON AIR TANK & PLUMBING
(USE CONTENTS OF PARTS PACKAGE #1)
Your 2.5 Gallon air tank comes with six 1/4” NPT port openings to allow installation in many configurations on
your vehicle. To insure safe and trouble-free use of your air tank, we strongly recommend that you install the
supplied drain cock and a safety pressure relief valve. (See Figure 1)
Tank Fittings:
Install the supplied compression fittings and/or quick connect fitting for the air tank in areas where they are
most appropriate for your installation using thread sealant. Make sure that the safety valve is installed in the
top most position on the tank, and that the drain cock is installed in the lowest position on the tank if the tank
is to be installed in any other position than upright on the tank’s mounting legs. Be sure that all fittings are
accessible later in the installation process since you will have to plumb air lines to each fitting as needed to
utilize the air tank.
Mounting the Tank:
We have included 6 pieces of rubber bushings in your tank mounting hardware. You have the option of using
two layers of rubber bushings on one of your tank lags to slightly tilt tank toward the drain cock to improve
drainage. Use the provided longer bolts, and corresponding washers, and nuts to mount the tank to a suitable
chassis or body point on your vehicle.
IMPORTANT:
- Tank is rated for 150 PSI maximum working pressure.
- Tank is NOT to be used as a breathing device.
- Bleed pressure from tank before servicing or adding attachments.
- Use only attachments or tools rated for 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 TANK AND REMOVE CONDENSATION
WILL CAUSE TANK TO RUST PREMATURELY.
- To remove accumulated condensation inside the tank, bleed pressure from tank until pressure is
approximately 5-20 PSI using drain cock
- Drain tank by opening the drain cock drain valve and close after draining tank.
- If drain cock valve is plugged, release all air pressure from tank, remove drain valve and clean, then reinstall.
IMPORTANT: Please observe air tank’s Date of Manufacture (stamped on tank leg).
Replace air tank 2 to 5 years from date air tank was first used, or use the date of manufacture as reference.
Adhering to air tank draining guidelines will prolong the life of your air tank.
PLEASE NOTE: RUSTED TANKS CAN FAIL CAUSING EXPLOSIONS OR FATAL INJURIES.
Discard tank immediately if tank is rusted.
SAFETY VALVE: When using a safety pressure relief valve, point the safety pressure relief valve away
from your body when releasing air. Use the pull ring on the safety relief valve to vent pressure from the
tank before servicing.
P/N 10005, 10007
OBA PLUMBING DIAGRAM
Typical System Configuration, May Vary Depending on Installation
15 Edelman
Irvine, CA 92618
949-585-0011
www.viaircorp.com
2.5
Gallon
Tank
Drain
Cock
Reducer
Pressure Switch
with Relay
Safety
Valve
Compression
Fitting
Compression
Fitting
Quick Connect
Couplers
Coil Hose
Dash Panel
Gauge
Leader Hose
From Compressor
Rev.1
Plumbing Diagram:
(Figure 1)