Figure 2-1. Front side. Operator ' s controls and indicators

TM 5-4120-356-14

INTAKE GRILLE DAMPER

Controls flow of air from conditioned area to the

e v a p o r a t o r f a n . P u s h damper down to limit to fully

c l o s e intake grille. Damper may also be positioned

b e t w e e n open and closed limits for partially opened

intake grille.

DAMPER DOOR CONTROL

Controls flow of outside air to the evaporator fan.

Door is spring-loaded open. Chain links in keyhole

s l o t i n p a n e l . Pull chain out to close damper door.

D o o r may be set at partially closed position by use

o f any of the chain links between open and closed

limits.

SELECTOR SWITCH

V E N T I L A T E : Selects ventilation mode.

Turns fan motor on.

C O O L : Selects cooling mode. Turns

f a n motor and compressor on.

L O - H E A T : Selects low heat mode. Turns

f a n motor and three of six heater

e l e m e n t s on.

H I - H E A T : Selects high heat mode. Turns

fan motor and six heater elements on.

OFF: Turns unit completely off.

THERMOSTAT

A d j u s t and maintains temperature of

conditioned air entering conditioned

area

FAN SPEED SWITCH

Adjusts speed of fan motor to either

h i g h speed or low speed.

BEFORE STARTING UNIT:

MAKE SURE NO AIR OPENINGS ARE BLOCKED.

TO START:

FOR VENTILATION ONLY, TURN SELECTOR SWITCH TO VENTILATE. ADJUST FAN SPEED

SWITCH TO DESIRED SPEED, HI-SPEED OR LO-SPEED.

FOR COOLING, TURN SELECTOR SWITCH TO COOI AND ADJUST THERMOSTAT TO DESIRED

TEMPERATURE. ADJUST FAN SPEED SWITCH TO DESIRED SPEED, HI-SPEED OR LO-SPEED.

FOR HEATING, TURN SELECTOR SWITCH TO EITHER LO-HEAT OR HI-HEAT AS DESIRED.

ADJUST THERMOSTAT TO DESIRED TEMPERATURE. ADJUST FAN SPEED SWITCH TO DESIRED

SPEED, HI-SPEED OR LO-SPEED.

TO STOP UNIT: TURN SELECTOR SWITCH TO OFF.

TS5-412035614/21

F i g u r e 2-1. Front side. O p e r a t o r ' s controls and indicators

2-2