Emerson COPELAND ZO18AG, Инструкции по применению

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14 AGL_Ref_ST_ZO_E_Rev00
compressor. This will prevent oil dilution and bearing stress on initial start-up. The crankcase
heater must remain energized during compressor off cycles.
Compressor model
Crankcase heater
Position Height (mm)
ZO18AG to ZO46AG 15
ZOV18AG to ZOV38AG 15
Table 10: Crankcase heater position
NOTE: Pl ease refer to the Spare Parts list available at www.climate.emerson.com/en-gb/tools-
resources to select the correct crankcase heater model.
Caution: Crankcase heaters must be properly grounded!
For installation, the manufacturer/installer shall follow the recommendations mentioned below.
Assembly instructions
▪
Choose the appropriate model according to compressor size and required wattage.
▪
Check the compressor application guidelines for crankcase heater connection and operation.
▪
Position the crankcase heater between the lower cover and the lower bearing weld projection
(Fig. 14) .
▪
Fit the heater horizontally around the crankcase, ensuring that it is in close contact with the
compressor housing along the entire length.
▪
Avoid having the heating portion of the heater in contact with any weld projection (Fig. 15 & 16) .
▪
Avoid having the assembly heater inclined (Fig. 17) .
▪
Close the lock and tighten the screw, torque: 2-3 Nm.
▪
The excess clamp bracket may be trimmed. Sharp edges must not come into contact with wires.
▪
The presence of the heater shall be made evident by the posting of caution signs or markings at
appropriate locations.
Figure 14 Figure 15 Figure 16 Figure 17
Electrical connection
▪
Connect the crankcase heater according to the compressor application guidelines.
▪
The crankcase heater must be connected only to its rated voltage.
▪
The metal braid of the heater must be connected to a suitable earthing terminal.
▪
Check the resistance according to the technical data.
▪
Perform an insulation test before start-up.
▪
Electrical security and safety measures are to be provided on site
.
3.6 Discharge gas temperature protection
CAUTION
Inadequate lubrication! Scroll set damage!
All ZO(V)*AG compressors
must be equipped with a discharge gas temperature protection.
A good system control shall prevent the system from operating outside the published operating
envelope and acceptable superheat range, whatever the climatic conditions and the capacity
demand. However, under some extreme operating conditions such as loss of charge or improper
control operation, the internal discharge gas temperature reached can cause compressor damage.