Federal SNR48, Инструкция по установке и эксплуатации

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Series ’9 0 Refrigerated Bakery Page 8
Refrigeration Installation
Self-Contained Models
The self-contained models are shipped from the factory with a completely operational
refrigeration system and require no modifications or adjustments of the system upon
installation.
Remote Models (Obsolete as of 1/1/2012)
The remote models are designed to use 134A refrigerant and shipped from the factory with
the evaporator coil, expansion valve, refrigerant solenoid valve, and thermostat. The
thermostat senses interior case temperature and opens and closes the refrigerant solenoid
valve as needed to maintain proper case temperatures. The condensing unit is optionally
supplied from the factory for remote location installation.
A. Mount condensing unit indoors as close to the remote display as practical. The
refrigeration line should be as short as possible.
B. All refrigeration and/or electrical materials between the condensing unit and display
case are to be supplied by installing contractor.
C. Route properly sized and designed refrigeration lines from the condensing unit to the
cabinet. Horizontal suction lines should be pitched downward towards the condensing
unit and least ½” per 10’ run to aid the oil drainage. A “P” trap must be installed in the
suction line at the foot of every riser to insure oil return. Dry nitrogen should be used to
flow through tubing while brazing refrigeration lines.
D. Suction line must be insulated the entire length with Armaflex (or equivalent). Do not
run liquid line inside insulation with suction line.
E. The filter drier, sight glass, and low-pressure control are not furnished with remote
display case models. The recommended low pressure setting for R134A refrigerant is
32# cut in and 0# cut-out.
F. Leak check condensing unit, cabinet, and all connecting tubing. Cabinet and
condensing unit tubing should be checked to insure no leaks occurred during shipping
or from rough handling. Make certain all refrigeration valves are opened and evacuate
system to 500 microns. Charge the system with refrigerant type specified on the data
plates.