VIAIR 444C Dual - Manual (Page 3)

MOUNTING AND WIRING
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 each air compressor with the four sets of bolts, nuts, washers, and locking washers
provided. (See Fig. 2 for Mounting Instructions) Use of thread sealant is recommended.
5. NOTE: For Remote Inlet Air Filter Installation, refer to Remote Inlet Air Filter Installation
Instruction included in the Remote Inlet Air Filter Pack.
6. Your air compressors come with heavy duty heat-resistant
leader hose with 1/4” NPT fittings. This leader hose is designed to prolong the life of
your air line. Do not remove the leader hoses from the air compressors.
7. IMPORTANT: Please note, the leader hose that comes with your compressor has a built-in
inline check valve. Do Not remove inline check valve from leader hose.
8. Select 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 hole 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. (Fig. 3)
11. Connect compressor positive lead wire to one of the leads of your pressure switch.
12. Make sure that your compressor setup is properly fused. Both 444C compressors will pull
38 amps at peak draw.
13. Always locate fuse as close as possible to power source.
14. Before connecting to power source, re-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 (pressure switch not
included) 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.
Repair connections as needed.
(Fig. 1) 444C Compressor Installation Parts List:
A. Hose Bracket (1pc) x2
B. Mounting Bolts (4pcs) x2
C. Flat Washers (8pcs) x2
D. Locking Washer (4pcs) x2
E. Nuts (4pcs) x2
F. 3/8” NPT F x 1/2” Barbed Fitting (1pc) x2
G. 3/8” NPT M x 1/2” Barbed Fitting (1pc) x2
H. Air Line Clips (3pcs) x2
I. Screws (3pcs) x2
J. Remote Inlet Air Filter with Filter Element (1pc) x2
(Fig. 2) Compressor
Mounting Hardware
B. Mounting Bolt
C. Flat Washer
D. Locking Washer
E. Nut
K. Vibration Isolator
USER MANUAL
444C DUAL PERFORMANCE VALUE PACK
B
A
C D E
F G
H
I
J
(Fig. 3) Leader Hose Bracket
L. Hose Clamp
M. Clamp Release Tab
N. Self Anchoring Pin
B
C
C
D
E
K
L
M
N