MCCORMICK MTX Series - Control Settings

Operating Controls
44
Control Settings
* Open or Close if Moisture is on Windshield.
** Open or Close if not Humid Outside.
NOTE: Use the maximum (III) settings for fast cooling, fast heat or for fast defrost. Use the high (II) or
minimum (I) settings for optimum operator comfort.
NOTE: Under certain conditions the heater fan can run at maximum speed when the control is in the 2nd, 1st
or OFF position. This is because of heat build up in a temperature controlled override switch, after a long
period of operation, and is a safety feature designed to prevent overheating of resistors in the circuit.
Air Conditioner Operation (If Equipped)
When the pressure indicator lamp is illuminated, the air conditioning system has turned off due to refrigerant
pressures that are too high or too low. This can indicate that the system needs service or that the ambient
temperature is too cool for air conditioning operation. To start the air conditioner again, turn the control to the
OFF position and then back to the ON position.
NOTE: The system has two safety switches to protect the system for low refrigerant level and high
restrictions. If, during tractor operation, the air conditioner stops working, see page 234 for more information.
NOTE: The system is equipped with an environmentally safe refrigerant, HFC-R134a. Never recharge the air
conditioning system with refrigerant other than HFC-R134a as this will result in loss of cooling and permanent
damage to all air conditioning components.
CAB ENVIRONMENT CONTROL SETTINGS
Type Condition
Required
Blower Speed
Control
Discharge
Vents
Defroster
Vents
Temperature
Control
Recirculation
Vent
Air
Conditioning
Cool
(With Air
Conditioning)
Adjust as
Required
Open Adjust as
Required
OFF Open ON/MAX
Cool
(Without Air
Conditioning)
Adjust as
Required
Open Adjust as
Required
OFF Closed Not
Applicable
Heat HIGH (II) or
LOW (I)
Adjust as
Required
Open Adjust as
Required
Open OFF
Pressurize MAX (III) Open Open ON or OFF Closed ON or OFF
Inside Window
Moisture
Removal
MAX (III) Open * Open ON/MAX Open ** ON/MED
To operate the air conditioner, the blower must be
o
n. The blower speed, temperature control and all
v
ents must be adjusted to obtain the best cooling
f
or the ambient temperature and dust conditions.
U
nder normal operating conditions, and with the
w
indows and doors closed, temperatures in the
c
ab of 6°C to 15°C less than the ambient
t
emperature will occur. When operating the air
c
onditioner system, the moisture level is
d
ecreased.
N
OTE: During cold weather, with ambient
t
emperature above 0°C, operate the air
c
onditioner at least once per month, for a period of
1
0 to 15 minutes. This will lubricate the seals to
p
revent them becoming brittle and help prevent
t
he loss of refrigerant from the system.
1. AIR CONDITIONING CONTROL
2. AIR CONDITIONER PRESSURE
INDICATOR
1
2