Section II. MOVEMENT TO A NEW WORKSITE

2-4. Dismantling for Movement.

Long

Distance

Movement.

Crate

the

air

conditioner, providing adequate protection to

a. General.

grilles and control panel. Refer to TM 38-250 for

(1) Shut off electrical power supply to air

i n s t r u c t i o n s in crate fabrication, if original shipping

conditioner and disconnect power cable from unit.

c r a t e is not available. Provide suitable blocking and

(2) Disconnect drain hose(s) from unit.

tie-downs to prevent unit from shifting during

NOTE

transfer and to keep the unit vertical.

Disconnect all duct work and remote control cable if

used with unit..

2-5. Reinstallation after Movement

Reinstall the air conditioner as instructed in

(3) Unbolt unit from mounting surface.

paragraph 2-3.

b . S h o r t D i s t a n c e M o v e m e n t . Use a forklift and

l i f t the unit at base, or carry unit to new worksite

keeping the unit vertical.

Section

III.

CONTROLS A N D

INSTRUMENTS

2-6. General

a r e listed and described in table 2-1. Figures 2-3, 2-

4 and 2-5 illustrate the controls and show their

This section describes, locates, illustrates, and

locations.

Table 2-1 provides the control

furnishes the operator/crew sufficient information

nomenclature, its reference designation, a

about the various controls to insure proper

description of the component and a description of

operation of the air conditioner.

its function.

2-7. Controls and Instruments

T h e controls and instruments on the air conditioner

Table 2-1. Controls and Instruments

Reference

Control

Function

designator

Description

Mode Selector

Controls the air conditioner functions as

F o u r wafer. five position rotary

follows: COOL position: Energizes control

selector switch.

circuits for cooling and fan drive motor. De-

e n e r g i z e s heater control circuits. VEN-

T I L A T E position: Energizes fan drive

motor, de-energizes cooling and heating

circuits. OFF position: De-energizes all

operating circuits. turns the air conditioner

off. LO-HEAT position: Energizes one bank

of heaters and fan drive motor. HI-HEAT

position: Energizes primary and secondary

heaters and fan drive motor, de-energizes

cooling control circuits.

Circuit breaker reset

Knob attached to circuit reset

Pull knob out to reset circuit breaker if it

knob

mechanism.

should trip. After resetting push knob back

in. Circuit breaker should rem ain in closed

position.

High pressure cutout

Part of high pressure cutout.

Push to reset, if air conditioner should cutout

reset

due to high discharge pressure.

Low pressure cutout

Part of low pressure cutout.

Push to reset if air conditioner should cutout

reset

due to low suction pressure.

Temperature

Control

Adjustable, single pole double-throw,

Provides for controlling the operation of either

Thermostat

action-thermostat with range from

the cooling circuit or heating circuit as the

+ 4 0 degrees to +90 degrees F

temperature and mode selector switch setting

with 2 degrees F differential at any

dictate.

particular setting.

Fun speed switch

Single pole single throw toggle

Provides for selection of high or low speed on

switch.

the fan drive motor.

Pull chain attached to hinged door in

Fresh air damper control

Provides for controlling the amount of fresh air

the fresh air duct.

intake.

2-5