Carrier Em1 Manual

4--15 T--311
Figure 4-27 (1)EM--3 Evap, (1)EM--7 Evap, (2) Skirt Condensers and a TM -- 31 Compressor (AC-- 9632)
FILTER
DRIER
FILTER
DRIER 

5-1
T--311
SECTION 5
ELECTRICAL
5.1 INTRODUCTION
Electrical harness routing is a critical process in the
installation of any transportation air conditioning
system. Pre-planning of the electrical harness path
between components will eliminate encounters with
commonly existing conditions which could result in
electrical system failure. Following proper electrical
harness routing procedures will ensure optimum
system performance and provide for a long lasting and
trouble free installation.
5.2 SYSTEM...

5-2
T--311 a. Carefully make an 8 Inch incision in the evaporator
cable close to where you will attach the ground wire
terminal.
b. Locate the green #10 wire from within the harness/
cable.
c. Cut the green #10 wire and pull from the cable.
d. Strip insulation from wire end and install a 1/4 inch
ring terminal.
e. Remove undercoating or paint from area where
ground will be attached.
f. Securely attach the ground wire terminal with self tap-
ping hardware or bolt (See Figure 5-2 & Figure 5-3).
g. Close...

5-3
T--311
Figure 5-6 Drivers Control Panel (Dual Systems)
5.5.2 Electrical Control Panel
The manual controls are wired to the electrical control
panel (see Figure 5-7) The panel contains relays and
circuit breakers used for system control. It must be
located in an area that is protected from heat, moisture,
dirt, and road hazards.
12
3
4
5
6
1. High Speed Relay
2. Condenser Relay
3. Compressor Clutch Relay
4. Circuit Breaker (HSR)
5. Circuit Breaker (CR)
6. Circuit Breaker (Ignition)
Figure 5-7...

5-4
T--311 these cables can be damaged easily if pulled across
rough or sharp areas of the bus chassis or A/C system.
1
234
5678
Figure 5-9 Total Control Electrical Panel (Typical)1Logic Module (Speed Control)
2Fuse(5Amp
3Circuit Breaker (Condenser)
4Circuit Breaker (High Speed)
5Clutch relay
6Relay Filter - PWM (Pulse Width Modulation)
7Condenser Relay
8High Speed Relay
NOTE
A completely wired Gen 5 dual system total
control is shown in Figure 5-10. Notice that the
system control panels are labeled...

6-1 T-- 311
SECTION 6
MOUNT KITS AND COMPRESSORS
6.1 INTRODUCTION
Carrier transport Air Conditioning offers a wide range of
compressors and corresponding mount kits for most en-
gine-chassis combinations. Carrier Transport Air Condi-
tioning mount kits are engineered to allow precise align-
ment and belt tensioning adjustments.
The mount and drive kit normally will contain the
mounts, hardware, pulleys, belts, idlers, etc. necessary
to safely mount the compressor to the bus engine.
Read and follow the...

6-2 T--311 6.2.1 TORQUE SPECIFICATIONS
Always torque to the specifications noted on each
mount kit installation instructions. The torque values
listed in Figure 6-2 and Figure 6-3 are are based on the
use of lubricated threads.
BltSi
Torque(FtLbTorque(FtLbTorque(FtLbBolt SizeDia.mm
q(Ft-Lb
CastIron
q(Ft-Lb
CastIron
q(Ft-Lb
CastIronDia.mmCastIronGrade 8.8CastIronGrade 10.9CastIronGrade 12.9
677109139187
8
10
1
8
13
2
3
18
27
810
12
1830
55
2345
75
2750
9512
1455
8575
12095
14514
16
85
130
120
175
145
210...

6-3 T-- 311
Clearance Zone IdentificationClearance at Mid Span
Figure 6-5 Belt Clearance Requirements
6.3.3 Pulley Alignment
Correct belt alignment is essential for alternator and
compressor belt life. The center line of all pulleys related
to compressor or alternator drive must be within 1/3
degree of true center. Refer to Figure 6-6 for
approximate measurements, and keep in mind, these
are maximum values. You should try to attain perfect
alignment whenever possible to maximize component
and belt life....

6-4 T--311 considered when making the aforementioned
measurements.
The next step is to lay the straight edge flush across the
face of the driven pulley. This is the best way to
determine angular misalignment. Again, adjust as
required. You should repeat this step for all pulleys until
acceptable alignment is achieved. Note the drive pulley
is the primary guide for alignment. Do not use idlers as a
guide for proper component belt alignment as bearing
play could give you false readings.
6.3.4 Drive Belt...

6-5 T-- 311 Note
The side to side mounting angle of the A-6 com-
pressor must remain±15°from the horizontal
(See Figure 6-9).
Access to the air conditioning service ports will vary. If
access cannot be made at the compressor, in-line ser-
vice ports must be installed as close to the compressor
as possible.
Special care must be used when routing the suction and
discharge hoses through the engine compartment.
These hoses must be kept away from sharp objects and
hot areas of the engine. Damage to the...