Harbor Freight Tools R134A Quick Start Guide
Red HP (High-Pressure) sideBlue LP (Low-Pressure) side
A/C MANIFOLD
GAUGE SET
Manifold
QUICK
REFERENCE
GUIDE
LP Coupler
Valve
ITEM 92649
LP Coupler
To prevent SERIOUS INJURY and DEATH:
1. READ ENTIRE MANUAL BEFORE USE.
2. Use in well-ventilated area only.
3. Wear ANSI-approved safety goggles and
heavy-duty work gloves during setup and use.
4. DO NOT OPEN either Manifold Valve unless
directed to do so; otherwise, refrigerant leaks,
A/C contamination, and hazardous expulsion
of pressurized refrigerant may occur.
LP
Valve
Secondary
Charging
Port
LP and
Vacuum
Gauge
Sight
Glass
Charging Hose
Manifold Valve
operation:
HP
Gauge
HP
Manifold
Valve
HP Coupler
HP Coupler
CW
CCW
Valve
WARNING
5. Keep gauge and hoses away
from moving engine parts.
6. Turn off vehicle’s engine and A/C system
before attaching gauge.
7. Technicians performing this procedure or
opening refrigeration circuit in automotive
air conditioning systems MUST be certied
in refrigerant recovery and recycling
procedures in compliance with section 609
of Clean Air Act Amendments of 1990.
= close
(clockwise)
= open
(counterclockwise)
Coupler Valve
operation:
= close
CCW
CW
(counter-
clockwise)
= open
(clockwise)
WARNING
A/C service can be dangerous.
To prevent SERIOUS INJURY,
read entire manual before use.
ATTACH COUPLERS:
Attach Couplers to
3
A/C system,
Blue to
suction LP port,
and Red to
discharge HP port.
Diagnostic Check
CHECK:
To do a dynamic check, turn on engine,
4
allow to warm up, then turn on A/C.
Open Coupler Valves - turn CW.
Compare Gauge readings to vehicle’s
service specications.
KEEP
CLOSED
CW
11
CW
CLOSED
KEEP
AFTER:
Close Coupler Valves by
5
turning CCW.
Shut off engine and A/C
system if dynamic check
was done.
CAREFULLY
disconnect Couplers
from A/C system;
hoses may contain
residual refrigerant.
4
CW
1
CCW
To suction
LP port
3
CONNECT HOSES:
Connect Red, Blue and Yellow Hoses
2
to Manifold and Couplers as shown,
RED – RED and BLUE – BLUE.
2
2
2
3
CLOSE ALL VALVES:
1
Manifold Valves - turn CW.
Coupler Valves - turn CCW.
4
CW
1
CCW
To discharge
HP port
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