Bryant 581B Typical Access Panel Locations Accessory Installation, Optional Varislide Economizer

Heat Anticipator Setting

The room thermostat heat anticipator must be properly ad- justed to ensure proper heating performance. Set the heat anticipator, using an ammeter to determine the exact re- quired setting.

NOTE: For thermostat selection purposes, use .14 amp for the approximate required setting. Set heat anticipator stage 1 and 2 at .14 amp.

Failure to make a proper heat anticipator adjustment may result in improper operation, discomfort to the occupants of the conditioned space, and inefficient energy utilization; how- ever, the required setting may be changed slightly to provide a greater degree of comfort for a particular installation.

Fig. 16 Ð Typical Access Panel Locations

F. Accessory Installation

At this time any required accessories should be installed on the unit. Control wiring information is provided in the unit wiring book. Refer to accessory Installation Instructions pro- vided with accessory.

G. Optional Varislide™ Economizer

The optional economizer hood assembly is packaged and shipped in the ®lter section. Damper blades and control boards are installed at the factory and the economizer is shipped in the vertical discharge position.

NOTE: Horizontal discharge block-off plate is shipped with the air hood package. If unit is to be used for vertical dis- charge application, discard this plate.

Assembly

1.Determine if ventilation air is required in building. If so, determine the minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 7.

2.Remove ®lter access panel by raising panel and swing- ing panel outward. Panel is now disengaged from track and can be removed. No tools are required to remove ®lter access panel. Remove outdoor-air opening panel. Save panels and screws. See Fig. 16. Remove optional outdoor-air damper hood package from ®lter section.

3.Assemble outdoor-air hood top and side plates as shown in Fig. 17. Install seal strips on hoop top and sides. Put aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.

4.Slide economizer into unit and secure with screws. See Fig. 18.

NOTE: Be sure to engage rear economizer ¯ange under tabs in vertical return-air opening.

5.To convert to horizontal discharge application:

a.Rotate the economizer 90 degrees until the econo- mizer motor faces the condenser section (see Fig. 19.).

b.Rotate the barometric relief damper cover 90 degrees.

c.Install horizontal discharge block-off plate over the opening on the access panel. (Block-off plate MUST be installed before installing hood assem- bly.) See Fig. 20.

6.Insert economizer plug into economizer harness. Re- move tape from barometric relief damper. See Fig. 21.

7.If ventilation air is not required, proceed to Step 9. If ventilation air is required, determine the minimum po- sition setting for required air¯ow. See Fig. 22. Adjust minimum position setting by adjusting the screws on the position setting bracket. Slide bracket until the top screw is in the position determined by Fig. 22. Tighten screws.

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Fig. 17 Ð Outdoor-Air Hood Details

ECONOMIZER	ECONOMIZER	ECONOMIZER	TOP
CONTROL BOARD	PLUG	MOTOR	SCREW

BAROMETRIC

RELIEF DAMPER

ECONOMIZER	POSITION SETTING
MOUNTING SCREWS	BRACKET

Fig. 18 Ð Varislide Economizer Installed in Unit