Description; General Description; Refrigeration Unit - - Front Section; Fresh Air Makeup Vent - Carrier Streamline Scroll 69NT20-531-300 Operation & Service Manual

2.1 GENERAL DESCRIPTION

2.1.1 Refrigeration Unit - - Front Section

The unit is designed so that the majority of the
components are accessible from the front, see
Figure 2-1. The upper access panels allow entry into the
evaporator section, and the center access panel allows
access to the evaporator expansion valve, unloader
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14
13
12
11
10
1. Access Panel (Evap. Fan #1)
2. Access Panel (Heaters, Suction Modulating
Valve, Unloader Valve & Evaporator
Expansion Valve)
3. Fork Lift Pockets
4. Control Box
5. Compressor
6. Receiver or Water Cooled Condenser
7. Economizer
8. Unit Serial Number, Model Number and

DESCRIPTION

9
8
7
6

Figure 2-1 Refrigeration Unit - - Front Section

SECTION 2
valve, suction modulation valve and evaporator coil
heaters. The unit model number, serial number and parts
identification number can be found on the serial plate to
the left of the economizer.

2.1.2 Fresh Air Makeup Vent

The function of the upper or lower makeup air vent is to
provide ventilation for commodities that require fresh
air circulation.
16
5
Parts Identification Number (PID) Plate
9. Power Cables and Plug
10. Condenser Fan
11. Interrogator Connector (Front left)
12. Blank Cover (Temperature Recorder Location)
13. Blank Cover (Lower Fresh Air Makeup Vent
Location)
14. Upper Fresh Air Makeup Vent
15. Access Panel (Evap. Fan #2)
16. Compressor Protection Panel (cutaway view)
2-1
1
2
3
4
T-309