Frost Free Units; Redesign Differentiation - U-Line Origins Series Service And Parts Manual

Redesign Differentiation

Through our continuous efforts to improve our product line, U-Line Corporation has
made some changes to the design of Models Combo 29FF and Combo 75FF.
The objective of this section is to assist the service technician in differentiating between
the previous design product and the new redesign.
The redesign involves a new compressor, evaporator and heat exchanger, condenser fan
motor, evaporator fan motor, drain trough, timer and power cord.
To address service problems which may exist in earlier designs, we developed a "Field Fix
Kit." It involves replacing the compressor, dryer, and hot gas valve. It also includes
mounting a sheet of insulation to the back panel. Before installing the new compressor,
hot gas bypass valve, and dryer, it is imperative that the entire refrigeration system be
blown out with nitrogen to remove any excess oil. This kit is to be installed in units with
R-134a only starting with serial number 7CF300000 or 2CF300000. Installation
instructions are included in each kit ordered.
The new compressor, a Matsushita Model SD39C replaces the previous compressor, an
Embraco EMI 50 HER.
Both the previous design and the new redesign are detailed in this manual. New design
units and previous design units can be differentiated by the serial numbers. All serial
numbers for the new redesigned units start with a number higher than 600000.
(Example: 2CF600001 is a new redesigned Combo 29FF.) Previous design units have
serial numbers which start with 300001, 400001, or 500001. (Example:
7CF400001 is a previous design Combo 75FF.)
Pages 45-46 show the parts breakdown for the previous design of the Combo
29FF. The parts replaced with the kit are denoted. The wiring diagram for this
model is on page 36.
Pages 41-42 show the parts breakdown for the previous design of the Combo
75FF. The parts replaced with the kit are denoted. The wiring diagram for this
model is on page 36.
Pages 47-48 show the parts breakdown for the new, redesign of the Combo
29FF. The wiring diagram for this model is on page 37. The information for the
hybrid redesign of the Combo 29FF can be found in the Échelon Service Manual.
Pages 43-44 show the parts breakdown for the new, redesign of the Combo
75FF. The wiring diagram for this model is on page 37.

FROST FREE UNITS

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