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DPS 016–028 Ton Component Description
Variable Speed Compressor
A variable speed compressor (COMP1) is used on all DPS
016-028. On DPS 16–20 ton units, the variable speed
compressor will be the only one present, and be on the right.
The discharge of the variable speed compressor is located on
the top and the suction is located on the side.
These pipes can also be identified by recalling that suction
lines will always be larger than discharge lines. The side
suction design is used to cool the motor with cold refrigerant.
Figure 27: Compressor Suction and Discharge on DPS
025–028 units
Fixed Speed Compressor (DPS 025–028 Only)
This compressor will always be located on the left and like the
variable speed has the suction line on the side of the dome
entering the scrolls and a discharge exiting from the top of the
shell.
High Pressure Switch
All Rebel Units will have a high pressure switch on each
compressor. HP1 switch is on the variable speed compressor
(COMP1) and HP3 is on the fixed speed compressor
(COMP3). These switches are normally closed devices
that are brazed directly to the refrigerant piping. When the
pressure at the switch exceeds 580 PSIG the switch will open.
This opening will interrupt the control signal to the variable
compressor drive or de-energize the contactor coil on the fixed
speed compressor, Both acts will shut down the compressors
and generate an alarm at the MicroTech III keypad.
Figure 28: High Pressure Switch
Refrigerant Screen
During manufacturing, service, and repair there is always the
potential for debris to accidentally enter the sealed refrigeration
system. Filter screens are positioned around the refrigerant
circuit to prevent any possible debris from entering critical
components; expansion valves, compressors, etc. These
screens are not bi-direction and must be installed in a specific
direction if replaced. Please be aware that these screens are
not desiccant filters and provide no moisture protection for
compromised systems.
Figure 29: Refrigerant Screen
High Pressure Switch
Refrigerant Screen
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IM 1125-7 • REBEL ROOFTOPS
Содержание Rebel DPS003A
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