Robinair 34788-H Recovery, Recycling, Recharging Unit - Manual (Page 4)

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Introduction
Robinair No. 34788-H is used on R-134a vehicles and is designed to be compatible with
existing service equipment and standard service procedures. This unit is a UL-listed, single-
pass system that meets SAE specifications for recycled refrigerant. Follow the SAE-J2211
recommended service procedure for the containment of R-134a.
The unit includes a 1.5 cfm (42 l/m) Robinair high vacuum pump for fast, thorough evacuation.
The compressor pulls the A/C system to 0 psig, then works in series with the vacuum pump
to achieve highly efficient recovery and immediate recharge. If the system is not opened for
service, there is no need to pull additional vacuum. If the system is opened for service, use
the unit’s vacuum cycle to remove air and moisture from the A/C system. (We recommend
a minimum 15-minute vacuum, or follow the vehicle manufacturer’s specs.) Note: R-134a
systems require special oils. Refer to the A/C system manufacturer’s service manual for oil
specifications.
Technical Specifications
Voltage . . . . . . . . . . . . . . . . . . . . . . .115V, 60 Hz
Operating Range . . 50° to 120° F (11° to 49° C)
Filter-Drier . . . . . . . . . . . .43 cu. in. spin-on type Pump Free-Air Displacement . . 1.5 cfm (42 l/m)
Dimensions . . . . . . . . . . . 49" H x 34" W x 23" D
. . . . . . . . . . . (124.5 cm x 86.4 cm x 58.4 cm)
Main Power Switch:
supplies electrical
power to unit.
Manifold Gauges:
connect to vehicle A/C
system; show system’s
low-side and high-side
pressure.
Flow Indicators: red
light indicates high-side
flow from vehicle A/C
system through unit;
blue light indicates low-
side flow from vehicle
A/C system through unit.
Digital Display: visual
interface between
operator and machine.
Control Panel:
folds flat for storage.
Tool Storage Areas
(additional storage
on back side for
extra filter-driers and
oil bottles).