Carrier Em1 Manual

vi T-311
LIST OF ILLUSTRATIONS -- Continued
FigurePage .................................................................................
Figure 5-4 Drivers Control Panel 5-2.............................................................
Figure 5-5 Controls Mounted Without Panel 5-2...................................................
Figure 5-6 Drivers Control Panel (Dual Systems) 5-3..............................................
Figure 5-7 Electrical Control Panel (Typical)...

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1-1
SECTION 1
DESCRIPTION
1.1 INTRODUCTION
This manual contains instructions for the proper
preparation of and installation of Carrier Transport Air
Conditioning split systems. This manual does not
replace proper training and/or certification required by
the EPA or other local agencies.
The purpose of this manual is to assist you in completing
a quality, trouble-free installation which will compliment
a quality product, and ensure optimum system
performance for the life of the vehicle.
While this...

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1-2 Table 1-2 CARRIER TRANSPORT AIR CONDITIONING SYSTEMS (GEN 4/5)
SYSTEM
TYPEBTUEVAP (S)COND (S)COMP (S)
AC-3140FB26,000(1) EM-14OEMOEM
AC-360FB30,000(1) EM-6OEMOEM
AC-3142FB26,000(1) EM-14(1) CM-2(1) 10 CID
AC-362FB30,000(1) EM-6(1) CM-2(1) 10 CID
AC-422FB40,000(1) EM-2(1) CM-2(1) 10 CID
AC-512FB48,000(1) EM-1(1) CM-2(1) 10 CID
AC-513FB52,000(1) EM-1(1) CM-3(1) 10 CID
AC-633FB60,000(1) EM-3(1) CM-3(1) 12.6 CID
AC-8322FB78,000(1) EM-3(2) CM-2(2) 10 CID
AC-82222FB80,000(2) EM-2(2) CM-2(2) 10 CID...

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1-3
Figure 1-3 GEN 5 Evaporator Model - Serial Number Location
Figure 1-4 CM-7/11 Rooftop Condensers - Serial Number Location
1.4 SYSTEM COMPONENTS
1. Thermostat - A thermostat is a temperature
sensitive device, which when activated, signals the
electro-magnetic clutch to engage.
2. Electro-Magnetic Clutch - The electro-magnetic
clutch controls the operation of the compressor. When
engaged, the compressor circulates refrigerant and
provides cooling (See Figure 1-5).
3. Compressor - The compressor...

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1-4 performs different heat transfer functions. Under low
pressure, refrigerant exists as a gas that can absorb
heat. under high pressure, refrigerant exists as a liquid
that can reject heat. The heat transfer propertiesexhibited when refrigerant changes state is the
foundation of the refrigerant cycle.
1
234
56
7Ambient Air InCool Air Out
1. Compressor
2. Discharge Line (hot gas)
3. Condenser
4. Liquid Line5. Filter Dryer
6. Evaporator
7. Suction Line
Figure 1-5 Refrigerant Flow and Typical...

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1-5 therefore the cooler air is circulated to the interior of the
vehicle.
The transfer of heat from the air to the low temperature
liquid refrigerant in the evaporator causes the liquid tovaporize. This low temperature, low pressure vapor
refrigerant then continues through the suction line and
returns to the compressor where the cycle repeats.
1 234
5 6 78
9
10
1. Compressor
2. Electro-Magnetic Clutch
3. Discharge Line
4. Condenser
5. Filter Dryer6. Liquid Line
7. Evaporator
8. Block Valve
9....

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1-6 1.6 EVAPORATORS
Evaporators are located in the interior of the vehicle.
Their primary function is to transfer heat contained in the
passenger compartment into the refrigerant. The
evaporators may be free blow mounted in the front, side
or rear of the vehicle (bus) to blow directly into theinterior or ducted to distribute the air in a planned
pattern, (the EM-20 is designed to sit on the vehicle’s
floor).
Refer to Table 1-3 (Gen 4) and Table 1-4 (Gen 5) for
Carrier Transport Air Conditioning...

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1-7 1.7 CONDENSERS
Condensers are normally located on the outside of the
vehicle. Their primary function is to reject heat absorbed
by the refrigerant from the passenger compartment to
the outside air. Condensers are normally located on thevehicle skirt or on the roof. If space in the vehicle skirt is
a problem, two (2) CM-2’s or two (2) CM-3’s can be
stacked on each other with a kit available from Carrier
Transport Air Conditioning. Carrier Transport Air
Conditioning condensers are listed in...

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2-1
SECTION 2
EVAPORATORS
2.1 INTRODUCTION
2.1.1 Description
Evaporators are located in the interior of the bus. Their
primary function is to transfer heat contained in the
passenger compartment into the refrigerant. The
evaporators may be free blow mounted in the front, side
or rear of the bus to blow directly into the interior or
ducted to distribute the air in a planned pattern.
2.1.2 Location
Before attempting to install any evaporator, always
insure that the evaporator will fit in the...

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2-2 2.2 REAR MOUNTED EVAPORATORS
2.2.1 GEN 4/5 Series EM-1, EM-2, EM-3, EM-7,
EM-6, & EM-14
To install the evaporator assembly in the rear of a bus
utilize the following installation procedures:
1. Un-pack the evaporator and check for any obvious
damage (Refer to Sec. 1.8).
2. Check the interior of the bus/vehicle to make sure the
evaporator(s) can be safely and properly installed in
the selected area. Refer to Table 2-1 or Table 2-2 for
evaporator dimensions.
Table 2-1 GEN 4 EVAPORATORS...