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

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Introduction
Robinair No. 34788 is used on R-134a vehicles and is designed to be compatible with existing service
equipment and standard service procedures. Model No. 34788 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
Nominal Voltage . . . . . . 34788: 115V, 60 Hz
34788-I: 230V, 50/60 Hz
Utilization Voltage Range. . . . 34788: 104–127
34788-I: 200–250
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)
Digital Display: visual
interface between operator
and machine.
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.
Control Panel:
folds flat for storage.
Database Expansion Slot: an
optional vehicle database will
supply information regarding
charge capacity by vehicle model.
Tool Storage Areas
(additional storage
on back side for
extra filter-driers and
oil bottles).