Johnson-controls AFFINITY 340968-XIM-A-0108 User Manual download pdf (Page 5)

340968-XIM-A-0108

Johnson Controls Unitary Products 5

CLEARANCES

All units require certain clearances for proper operation and

service. Refer to Table 10 for the clearances required for

combustion, construction, servicing and proper unit opera-

tion.

DUCT WORK

These units are adaptable to downflow use as well as rear

supply and return air duct openings. To convert to downflow,

use the following steps:

1. Remove the duct covers found in the bottom return and

supply air duct openings. There are four (4) screws

securing each duct cover (save these screws to use

later).

2. Install the duct covers, removed in step one, to the rear

supply and return air duct openings. Secure with the four

(4) screws used in step one.

3. Seal duct covers with silicone caulk.

Duct work should be designed and sized according to the

methods of the Air Conditioning Contractors of America

(ACCA), as set forth in their Manual D.

A closed return duct system shall be used. This shall not pre-

clude use of economizers or ventilation air intake. Flexible

joints may be used in the supply and return duct work to min-

imize the transmission of noise.

NOTE: Be sure to note supply and return openings.

Refer to Figure 9 for information concerning rear and bottom

supply and return air duct openings.

ROOF CURB

On applications when a roof curb is used, the unit must be

positioned on the curb so the front of the unit is tight against

the curb.

FILTERS

Single phase units are shipped without a filter and is the

responsibility of the installer to secure a filter in the return air

ductowrk or install a Filter/Frame Kit (1FF0110 for the

DNA018 thru DNA042 and 1FF0112 for the DNA048 and

DNA060).

Filters must always be used and must be kept clean. When

filters become dirt laden, insufficient air will be delivered by

the blower, decreasing your units efficiency and increasing

operating costs and wear-and-tear on the unit and controls.

Filters should be checked monthly especially since this unit is

used for both heating and cooling.

CONDENSATE DRAIN

A condensate trap is recommended to be installed in the con-

densate drain. The plumbing must conform to local codes.

Use a sealing compound on male pipe threads. Install the

condensate drain line (NPTF) to spill into an open drain.

TABLE 2: UNIT WEIGHTS AND CENTER OF

GRAVITY

UNIT

SIZE

SHIPPING

WEIGHT

(LBS.)

OPERATING

WEIGHT

(LBS.)

CORNER WEIGHTS

(LOCATION, LBS.)

“A”“B”“C”“D”

018 365 360 91 88 89 92

024 365 360 91 88 89 92

030 395 390 98 95 96 99

036 400 395 100 96 98 101

042 415 410 104 100 101 105

048 475 470 119 115 116 120

060 480 475 120 116 117 122

FIGURE 2 - UNIT CENTER OF GRAVITY

Do not permit overhanging structures or shrubs to

obstruct the condenser air discharge, combustion

air inlet or vent outlet.

When fastening duct work to the side duct flanges

on the unit, insert the screws through the duct

flanges only. Do not insert the screws through the

casing. Outdoor ductwork must be insulated and

waterproofed.

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