Carrier Air 4 Life Manual

							9T-- 326
UNITOPERATION
2.1 OPERATING INSTRUCTIONS
Before attempting to operate thesystem, power mustbe available
from the vehicle battery. If the engine is not running, start the
engine. Most systems willnot operate unless asignal is received
to the controller from the vehicle ignition.
Carrier Transport AirConditioning system’s can be supplied with
two different type manual controls. the Standard Manual Control
and the Florida Control
1 2 3
45
1 Control Panel Housing
2 Nameplate (Switch
Mounting)
3 Thermostat Control4 Fan Speed Switch
(3 Speed or Variable)
5 Ambient Air Sensor
(Thermostat)
Figure 2-1 Drivers Control Panel -- Standard
2.2 DRIVER’S CONTROL PANEL -- STANDARD
The standard Drivers Control Panel (See Figure 2-1), consists of
an evaporator fan speed switch (three speed or variable) and an
adjustable thermostat. The drivers control panel is normally located
within easy reach of the driver. On larger bus applications there
could be two separate air conditioningsystem driver control panels.
One for each system. 
						

							10 T-- 326 There will be some applications where the switch mounting plate,
thermostat and fan speed switch are mounted in the drivers area
without the control panel housing.
On other applications the vehicle manufacturer (OEM) will supply
different type controls for the air conditioningsystem. Refer to OEM
technical manual for operating instructions.
2.2.1 Fan Speed Switch (three speed or variable)
Turning this switch clockwise will energize the evaporator and
condenser fan motors. The compressor clutch will also be
energized if the thermostat calls for cooling (see thermostat control
operation).
Three Speed --The standard fan speed switch has four settings,
Off (0), Low (1), Medium (2), and High (3) speed operation. This
switch controls the operation of the system and the evaporator
blower(s) by energizing the appropriate circuits and relays located
on the electrical control panel.
Variable Speed --Certain applications may be fitted with a variable
speed control switch instead of the standard three speed switch.
This switch controls the speed of the evaporator motors by varying
the supply voltage.
2.2.2 Thermostat Control
The thermostat controls the temperature within the passenger
compartment by switchingsystem components on and off.
Rotate the potentiometer switch knob to the right (clockwise) for
maximum cooling. Rotate the potentiometer switch knob to the left
(counterclockwise) for less cooling.
2.3 DRIVER’S CONTROL PANEL -- FLORIDA (TEMPCON)
This control panel (See Figure 2-2) is normally used in school
buses located within the state of Florida, but not limited to that area.
This controller is wired to an electrical control board.
The controller consists of:
a. ON/OFF Switch
b. Fan Speed Switch
c. Potentiometer
d. In-- Line Fuse (Behind Controller)
2.3.1 ON/OFF Switch
Power is supplied to the controller, through an in-- line fuse (see
Figure 2-3) from a 12 VDC ignition source originating from the
vehicle. The controller will not operate until the ignition switch is
activated. 
						

							11T-- 326 Move the ON/OFF switch to the ON position. A green light will
illuminate indicating that the controller has power. At the same time
the evaporator fans will operate in either Low, Medium or High
speed, depending on the Fan Speed switch location.
1
2
3
4
5
1FacePlate
2 Green Light
3 Rocker Switch, 2 Position, ON/OFF
4 Rocker Switch, 3 Position, LOW-- MED-- HIGH
5 Thermostat Control (Potentiometer)
Figure 2-2 Switch Assembly (TEMPCON)
2.3.2 Fan Speed Switch -- 3 Speed
The evaporator fan speeds can be adjusted by pushing the rocker
switch to the desired position:
a. H = High Speed
b. M = Medium Speed
c. L = Low Speed
When the evaporator fan speed switch is positioned at the desired
speed, a signal is sent to the corresponding fan speed relay located
on the electrical circuit board.
2.3.3 Thermostat Control
The thermostat control potentiometer has an operating range of 60
to 85 degrees F.
Rotate the potentiometer switch knob to the right (clockwise) for
maximum cooling. Rotate the potentiometer switch knob to the left
(counterclockwise) for less cooling. 
						

							12 T-- 326
Fuse
3Amp In-- Line
Fuse &
Holder
Fuse
Cover
Figure 2-3 In--Line Fuse & Holder (3 Amp)
2.3.4 In -- line Fuse
The controller is protected by a 3 Amp ATO type in-- line fuse
(Figure 2-3). To replace the fuse do the following:
a. Make sure ignition power is off.
b. Grasp fuse cover at finger grips and lift off cover.
c. Remove fuse and check if fuse is defective.
d. Replace if needed.
e. Push fuse cover back on to in-- line holder.
f. Restore ignition power and place ON/OFF switch to ON.
2.4 PRE--TRIP INSPECTION
After starting systemoperation, allow system to stabilize for ten to
fifteen minutes and check for the following:
1. Listen for abnormal noises from the vehicle engine, evaporator
and condenser areas.
2. Ensure evaporator and condenser fans are operating.
3. Ensure water is not dripping from the evaporator or air ducts.
4. Check for reduced airflow. This is normally caused by dirty or
clogged evaporator filters. 
						

							13T-- 326
SYSTEMMAINTENANCE
3.1MAINTENANCESCHEDULE
SYSTEMOPERATIONONOFFOPERATION
a. Daily Maintenance
XX
XPre-- trip inspection -- after starting. (Refer to para-
graph 2.4)
Check tension and condition of drive belts.
b. Weekly Maintenance
X
XPerform daily inspection
Check condenser, evaporator coils and return air
filters for cleanliness
c. Monthly Maintenance
X
X
X
X
X
XPerform weekly inspection
Clean or replace Evaporator return air filters
Inspect Condenser coil fins -- Clean when neces-
sary
Inspect refrigerant hoses and fitting connections.
Inspect electrical harness and connections
Check battery voltage -- System operates efficiently
at 13.5 volts
d. Quarterly Inspection
X
X
X
X
X
XInspect Evaporator(s) coil fins (heater coil if
installed) Clean if needed.
Check blower operation.
Check current draw and voltage of system compo-
nents including fan motors.
Check that all compressor mounting brackets and
hardware are tight. Tighten and torque to proper
specifications.
Check hose and harness under vehicle for proper
support and protection
Check Evaporator drain lines. 
						

							14 T-- 326SYSTEM
OPERATION(Continued)ONOFFOPERATION(Continued)
e. Semi--Annual Inspection and Maintenance
X
X
X
X
X
X
X
Check system pressures.
Check refrigerant in sight glass.
Check element in the the sight glass. (Green is dry
-- Yellow is wet)
Inspect condenser fan blades.
Open bus heater valves (In winter).
Close bus heater valves (In spring).
Remove or install optional condenser winter guard
kit.
f. Annual Inspection and Maintenance
X
X
X
X
XInspect electrical panel and terminals. Clean if
needed with a high-grade cleaner specifically for-
mulated for this purpose.
Inspect Evaporator drain pan. (Clean if needed)
Check pressure switch operation.
Check evaporator roof mounting and sealing.
Check condenser mounting, fan guards, and
screen/grill.
3.2WARRANTY/SERVICE
Thank you for choosing a Carrier Transport Air Conditioningsystem
for your vehicle. We want to assure you of our continuing interest
in your pleasure and satisfaction with yourair conditioning system.
Remember, if you have a question or concern and need help,
contact your nearest Transport Air Conditioning Dealer.
To find the Carrier Transport Dealer nearest you, go to
www.transportaircon.carrier.com and click on “Dealer Locator”, or
refer to the CarrierBus StopDealer Directory (62-- 10810), or
contact the Carrier Transport Air Conditioning Technical Service
Hot-- Line 1 (800) 450-- 2211. for the center nearest you. 
						

							Index 1
INDEX
C
Clutch -- Electro-- Magnetic, 4
Compressor, 4
Condenser, 4
Control Panel -- Florida, 10
Control Panel -- Standard, 9
E
Evaporator, 5
F
Filter/Dryer, 5
Fuse, In-- Line, 12
I
Introduction, 1
M
Maintenance Schedule, 13
Max System, 4
Model Tag, 6
O
Operating Instructions, 9
P
Pre-- Trip Inspection, 12
R
Refrigerant, 3, 6
Resistor, 5
S
Safety, 3
Sensor -- Return Air, 4
Serial Tag, 6
Split System, 4
Stand-- Alone System, 4
Switch -- Fan Speed, 10, 11
Switch -- ON/OFF, 10
Switch -- Pressure, 6
System Components, 4
System Designations, 4
System Maintenance, 13
System Label, 8
T
Thermostat -- Freeze-- Up, 6
Thermostat -- Return Air, 4
Thermostat Control, 10, 11
Tie--In System , 4 
						

							Index 2
INDEX(CONTINUED)
U
Unit Information, 4
Unit Operation, 9
V
Valve -- Expansion/Block, 5
W
Warranty/Service, 14
What Is Air Conditioning, 4 
						

							©2005 Carrier CorporationDPrinted in U. S. A. 0605A member of the United Technologies Corporation family. Stock symbol UTX
Carrier Transport Air Conditioning
50 Grumbacher Road
York PA 17402 U.S A
Tel: 1 --800 --673 --2431
Fax: 1 --717 --764 --0401
Carrier Transicold Division,
Carrier Corporation
Transport Air Conditioning Group
P.O. Box 4805
Syracuse, N.Y. 13221 U.S A
www.carrier.transicold.com