McQuay Suite II, Установка и обслуживание данных

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An inherent advantage of the Incremental system is that fail-
ure of any part affects only one incremental conditioner and
does not interrupt the operation of the rest of the system. A
further advantage is that a failed part can be quickly and eas-
ily replaced, thus minimizing the inoperative time of the equip-
ment. This is so, however, only if a replacement part is quickly
available. In order to replace a failed part quickly and keep all
incremental conditioners in good operating condition, McQuay
International recommends that at the time incremental condi-
tioners are purchased, owners arrange for a small stock of
replacement parts.
Where an owner carries such a stock, immediate replacement
parts of defective part is possible. The defective part can then
be returned to McQuay International or one its authorized ser-
vice stations. So long as it is still in warranty, it is repaired or
replaced and returned to the owner with out cost for shop
labor and material. Thus, the stock of replacement parts is
constantly replenished. To the right is listed the kinds of parts
which McQuay International recommends to be carried in
Every motor-driven refrigeration system operates on the carnot
cycle. A practical understanding of what goes on at the vari-
ous steps in this cycle can be a big help to the troubleshoot-
ing mechanic. Figure 18 illustrates the refrigeration cycle. The
diagram shows what occurs in each component of a hermeti- cally sealed system, as used in all McQuay Air Conditioning
equipment. The temperatures shown are typical of what they
might be when the air entering the condenser (outdoor tem-
perature) is 95
° F, (350 C) and the temperature of the condi-
tioned space is 80 ° F (270 C).
stock, together with the quantity of parts recommended per
100 incremental conditioners installed.
Cooling Chassis ............................................................ 1
Compressor Overload Device ....................................... 1
Compressor Running Capacitor ................................... 1
Fan Motor. Capacitor .................................................... 1
Control Switch .............................................................. 2
Thermostat .................................................................... 2
Knob for Control Switch & Thermostat ......................... 6
Control Relay (if used) ................................................... 1
Damper Motor (if auto damper) .................................... 2
Electric Resistance Heater (if electric heat) .................. 1
Touch-up Paint (1 pt. spray can) ................................... 1
For the current spare parts list, and applicable prices, see your
McQuay representative or write McQuay Service, P.O. Box
1551, Minneapolis, MN 55440.
Recommended Spare Parts
Refrigeration Cycle
Figure 18. Refrigeration Cycle
95 ° F. (35 ° C.)
Outdoor Air
to Condenser
60.3 psia (416 kPa)
& 60
° F. (15.5C.)
to Compressor (Gas)
Hermetic Compressor
60 ° F. (15.5 ° C.)
Conditioned Air to
Room
80 ° F. (27 ° C.)
Room Air
to Evaporator
45
°
F. (7
°
C.)
R22 (Liquid and Gas)
to Evaporator
120 ° F. (49 ° C.) Condenser Air to Outdoors
110 ° F. (43 ° C.)
Liquid R22 to
Capillary
Capillary Restrictor
Condenser
Evaporator
285.3 psia (1967.7 kPa) R22 to Condenser (Hot5 Gas)