Section III. Operation Under Usual Conditions

TM 5-4120-356-14

S e c t i o n III. Operation Under Usual Conditions

2-3.

a . The instructions in this section me for the information and guidance of

personnel responsible for the operation of the air conditioner.

b . T h e operator must know how to perform every operation of which the air

c o n d i t i o n e r i s c a p a b l e . T h i s section gives instructions on starting and stopping

the air conditioner, basic motions of the air conditioner, and on coordinating basic

motions to perform specific tasks for which the equipment is designed.

c . Although the air conditioner is normally used for mechanically cooling

and heating the control space automatically, it may also be used to ventilate only.

C a r e should be taken to insure that doors to the conditioned space close with a good

s e a l a g a i n s t t h e a m b i e n t ( o u t s i d e ) a i r . F r e q u e n t door opening will impose an abnor-

mal load on the air conditioner, preventing normal on and off cycles."

d . The operator must be o b s e r v a n t at all times, particularly concerning un-

u s u a l sounds that would indicate m a l f u n c t i o n i n g of the air conditioner. When unus-

u a l s o u n d s o c c u r , s t o p o p e r a t i o n a n d report the condition to Organizational Mainten-

ance.

2-4.

Preparation for Starting.

(1) Make sure that the air conditioner cover is unzipped and rolled up,

and that the retaining straps are attached to the top.

(2) Refer to paragraph 2-2 and perform the daily preventive maintenance

c h e c k s and services.

( 3 ) M a k e sure that the air conditioner is connected to a 2 0 8 v o l t , 3 -

phase,

50/60Hz electrical power source.

(4)

M a k e sure that none of the air openings of the air c o n d i t i o n e r a r e

blocked.

( R e f e r to figures 2-1 and 2-2.)

Starting.

(1) Cooling operation.

(a) Position the thermostat for temperature desired.

(b) Place the fan speed toggle switch in the desired position.

( d ) F o r c o o l i n g w i t h 1 0 0 p e r c e n t r e c i r c u l a t e d a i r , c l o s e damper

door.

( e ) F o r c o o l i n g w i t h m i x t u r e o f r e c i r c u l a t e d a i r and fresh air,

2-4