Carrier 50TC Rig and Place Unit, Install Outside Air Hood, Unit Damage Hazard

Step 6 — Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 7 for additional information.

Lifting holes are provided in base rails as shown in Fig. 7. Refer to rigging instructions on unit.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

All panels must be in place when rigging. Unit is not designed for handling by fork truck.

Before setting the unit onto the curb, recheck gasketing on curb.

Positioning on Curb —

Position unit on roof curb so that the following clearances are maintained: 6.4 mm (1/4 in.) clearance between the roof curb and the base rail inside the front and back,

0.0mm (0.0 in.). clearance between the roof curb and the base rail inside on the duct end of the unit. This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately equal to section C-C in Figs. 4 and 5.

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

After unit is in position, remove rigging skids and shipping materials.

Step 7 — Convert to Horizontal and Connect Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit without factory-installed economizer or return air smoke detector option may be field-converted to horizontal ducted configuration. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation-side down. Seals around duct openings must be tight. See Fig. 8.

Field-supplied flanges should be attached to horizontal duct openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork.

C06108

Fig. 8 - Horizontal Conversion Panels

Step 8 — Install Outside Air Hood

Economizer Hood Removal and Setup - Factory Option

1.The hood is shipped in knock-down form and located in the return air compartment. It is attached to the economizer using two plastic tie-wraps.

2.To gain access to the hood, remove the filter access panel. (See Fig. 9.)

3.Locate and cut the (2) plastic tie-wraps, being careful to not damage any wiring. (See Fig. 10.)

4.Carefully lift the hood assembly through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position Hood on page 12.

FILTER ACCESS PANEL

INDOOR COIL ACCESS PANEL

C06023

Fig. 9 - Typical Access Panel Locations

50TC

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