Tecumseh Argus, Руководство по установке

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11
Remote Condensing Unit Installation Instructions
©2019 Tecumseh Compressor Company LLC. All rights reserved. TPC Part #71511 | Rev A 05/13/2019 www.tecumseh.com
This is extremely important with any refrigeration system. The critical value which must be checked is suction
superheat. Suction superheat should be checked at the compressor as follows:
1. Measure the suction pressure at the suction service valve of the compressor and determine the saturation
temperature corresponding to this pressure from a “Temperature-Pressure” chart.
2. Measure the suction temperature of the suction line about one foot back from the compressor
using an accurate thermometer.
3. Subtract the saturated temperature from the actual suction line temperature. The difference is superheat.
Too low a suction superheat can result in liquid being returned to the compressor.
This will cause dilution of the oil and eventual failure of the bearings and rings or in the extreme case, valve failure.
Too high a suction superheat will result in excessive discharge temperatures which cause a breakdown of the oil
and results in piston ring wear, piston and cylinder wall damage.
It should also be remembered that the system capacity decreases as the suction superheat increases. For
maximum system capacity, suction superheat should be kept as low as is practical. We recommend that the
superheat at the compressor be between 10°F and 20°F, to meet compressor manufacture guidelines.
If adjustments to the suction superheat need to be made, the expansion valve at the evaporator should he adjusted.
SYSTEM BALANCING – COMPRESSOR SUPERHEAT
IMPORTANT:
In order to obtain the maximum capacity from a system, and to ensure trouble-free
operation, it is necessary to balance each and every system.
NOTE:
All adjustable controls and valves must be field adjusted to meet desired operation. There are
no factory preset controls or valve adjustments. This includes low pressure, high pressure, adjustable head
pressure systems and expansion valves.