Heating and Air Conditioning Operating Instructions
– 40 – Y53-6008
Medium Duty (R10/06)
the cab: fan speed switch (A), air directional control switch
(B), air temperature switch (C), and air circulating mode
switch (D). With optional air conditioning, a fifth switch (E) is
used.
Fan Speed Control
The fan speed rotary switch (A) allows you to select one of
four blower speeds (1-4).
Air Direction Control
The air direction rotary switch (B) controls the air movement
within the cab. Five modes direct the air flow to the three sets
of air outlets: front panel, floor, and window defrost:
1.Front Panel only
2.Panel and Floor (Bi-level)
3.Floor only
4.Defrost and Floor (Bi-level)
5.Defrost only
Temperature Control
The temperature rotary switch (C) allows you to adjust and
maintain a comfortable internal cab temperature.
Air Circulation Control
The air circulation rocker switch (D) allows you to select
FRESH air from outside the cab or recirculate (RECIRC) air
from within the cab.
Air Conditioner Control
The optional air conditioner is engaged with this rocker
switch (E).
Heating
To heat the cab: select the desired air direction and circulat-
ing mode (B and D) and set the temperature knob (C) to hot
(red position on the control). Adjust the fan speed (A) as
desired.
