Aprilaire 1952 Service Manual download pdf (Page 4)

INSTALLATION OF EXTERNAL MOUNT ROOFTOP UNITS (MODELS 1952 & 1953)

a. The lamps are intended for evaporator coil treatment. See Figure 2 for typical installation. If a single Lamp cannot illuminate the

majority of the evaporator coil, two or more units might be required as shown. To the extent possible, the Lamp(s) should be centered

on the coil (or section thereof) being illuminated.

b. Install lamp in location that prevents exposure of

plastics, rubber, paper, and other non-metallic

materials to UV light, or shield such materials with

aluminum tape, sheet metal, or metal conduit.

See CAUTION statements at beginning of

manual for more details.

c. To protect lamp, do not install lamp below any

source of water.

d. Install units so that Lamp is at least 3 in.,

but not more than 36 in., away from evaporator

coil surface.

e. Install lamp in a location that can be easily

accessed. Allow clearance to slide lamp in and

out of rooftop unit. Model 1952 lamp is 24 in.

and Model 1953 lamp is 32 in.

f. Be certain the area in the equipment where you intend to drill and cut is free of any obstructions or components that would be

damaged by the installation or interfere with the installation.

g. While keeping these guidelines in mind, note that the more direct exposure the coil and drain pan receive, the

greater the benefit the lamps will have.

Lamp

Unit Base

Ballast

Fuse

Lamp

Retaining

Bracket

Lamp Base

Lamp Socket

Safety Interlock Switch

FIGURE 1 – Model 1952/1953

90-745

DETERMINE MOUNTING LOCATION

Determine a mounting location for the lamp. Use the criteria below to select a proper location:

Evaporator Coil

Blower

FIGURE 2 – Typical Installation of Model 1952/1953

90-747

1 2 3 4 5 6 7 8 9 10 11 12

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Aprilaire 1952 Service Manual Page 4