Chapter 2. INSTALLATION AND OPERATION INSTRUCTIONS

TM 5-4120-274-15

CHAPTER 2

INSTALLATION AND OPERATION INSTRUCTIONS

Section I. SERVICE UPON RECEIPT OF EQUIPMENT

attnuator and/or the blockoff plate with an elec-

2-1. Unloading the Equipment

trical receptacle, and Use a remote control box.

a. Remove any blocking or tiedowns that may

b. Sound Attenuator. The sound attenuator

have been used to secure the item to carrier. The

will provide a sound dampening effect and is

air conditioner is shipped in a wooden carton, the

mounted on the front of the air conditioner (fig.

base of which is raised to provide for insertion of

1-2). The sound attenuator replaces the air in-

bongs of a forklift.

take and discharge grilles and air is taken in and

b. Use a forklift or other suitable lifting de-

discharged through the attenuator baffles. Air is

vice to remove unit from carrier. If necessary, the

taken in through the bottom and discharged

unit may be unloaded manually.

through the top of the attenuator. Refer to fig-

Caution: Use care in handling to avoid

ure 1-2, and install the sound attenuator as fol-

damaging the air conditioner.

lows:

(1) Remove the intake and discharge grilles

2-2. Unpacking the Equipment

(fig. 3-4, 3-5).

a. General. Move air conditioner to installation

(2) Place the sound attenuator in position on

site before removing shipping container. Cut the

the front of the unit by alining the grille mount-

metal bands and remove top, end, and sides of

ing holes with the attenuator mounting holes.

carton, and the Kimpak covering. Remove bolts

Note. Make sure that the notched edge of the

securing base of unit to carton, and wing the

attenutor frame matches the damper door control chain

handles, lift unit from carton.

location.

b. Depreservation. Prior to placing unit in op-

(3) Install the mounting bolts.

eration, accomplish depreservation in accordance

(4) Store the grilles so as to avoid possible

with instructions outlined in DA Form 2258

damage.

(Depreservation Guide of Engineer Equipment).

DA Form 2258 is attached or near the op-

Caution: The use of the sound attenuator

erational controls.

may result in reduced capacity.

2-3. Inspecting and Servicing Equipment

c. Blockoff Plate. The blockoff plate is pro

vided for installation when the controls are re-

a. Perform daily preventive maintenance serv-

ices (fig. 3-1).

moved for control operation. The blockoff plate

provided must be used so that no air will enter

b. Perform quarterly preventive maintenance

the lower compartment. Refer to figure 2-1 and

service (fig. 3-2).

install the blockoff plate.

c. Inspect entire air conditioner for signs of

damage, paying particular attention to evaporator

2-5. Installation or Setting-Up Instructions

and condenser roils.

d. The air conditioner contains a full operating

a. General. Set air conditioner in a level posi-

tion to allow proper condensate draining (opera-

charge of refrigerant and compressor oil. No fur-

ther service is required.

tion will be satisfactory with unit sitting at a

slight angle ( 5 maximum) and using one of the

2-4. Installation of Separately Packed

alternate drain connections).

Components

b. Locating the Unit. The front access panel

a. General. The air conditioner is basically a

and discharge and intake grilles are removable for

normal service and maintenance, and must always

self-contained unit, however, in certain installa-

tions it may become desirable to utilize the sound

be unobstructed to allow sufficient air for con-

2-1