Bryant 551B - Manual

Bryant 551B

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Table of Contents:

  • Page 2 – Step 1 —Provide Unit Support; Roof Curb; Ductwork; Horizontal Conversion Panels; Step 2 —Field Fabricate Ductwork; Do not connect ductwork to unit.; Step 3 —Install External Trap for Condensate; WARNING
  • Page 3 – Roof Curb Details
  • Page 4 – Condensate Drain Connection; Do not install unit in an indoor location; NOTE: Trap should be deep enough to offset maximum unit static; Condensate Drain Piping Details
  • Page 5 – Rigging Details; Failure to follow this warning could result in personal
  • Page 8 – Make Electrical Connections; Do not use gas piping as an electrical; must
  • Page 11 – Power Wiring Connections; Field Control Wiring Raceway
  • Page 22 – Adjust Factory-Installed Options
  • Page 23 – CB; Typical Rooftop Unit with Perfect Humidity; Damper Installed
  • Page 24 – Typical Access Panel Locations
  • Page 27 – SENSOR; Enthalpy Sensor and Mounting Plate
  • Page 28 – O x
  • Page 29 – The factory default configuration for the EconoMi$er IV control
  • Page 30 – EconoMi$er IV Control; CO
  • Page 32 – Perfect Humidity; UNIT
  • Page 34 – Table 14 — Evaporator-Fan Motor Efficiency; watts input x motor efficiency; GENERAL FAN PERFORMANCE NOTES; See Table 10 and 11 on this page for additional information.
  • Page 48 – NOTE
  • Page 49 – Units With Perfect Humidity
  • Page 50 – SERVICE; Cleaning
  • Page 51 – Lubrication
  • Page 52 – EconoMi$er IV Adjustment; No Charge
  • Page 54 – Replacement Parts
  • Page 55 – 51C - 2 TON CHARGING CHART; Cooling Charging Chart,
  • Page 57 – TROUBLESHOOTING; Unit Troubleshooting
  • Page 58 – EconoMi$er IV Troubleshooting Completion; This procedure is used to return the EconoMi$er IV to operation.; Table 35—Cooling Service Analysis
  • Page 60 – EconoMi$er IV Functional View
  • Page 61 – I. PRELIMINARY INFORMATION; ELECTRICAL; GENERAL
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1

Installation Instructions

551B 036--072

551C 024--060

SINGLE--PACKAGE ROOFTOP ELECTRIC COOLING

UNITS WITH OPTIONAL ELECTRIC HEAT

TABLE OF CONTENTS

Page

SAFETY CONSIDERATIONS

1

. . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 1--Provide Unit Support

2

. . . . . . . . . . . . . . . . . . . . . .

ROOF CURB

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SLAB MOUNT (Horizontal Units Only)

2

. . . . . . . . . . .

ALTERNATE UNIT SUPPORT

2

. . . . . . . . . . . . . . . . .

Step 2--Field Fabricate Ductwork

2

. . . . . . . . . . . . . . . . . . .

Step 3--Install External Trap for Condensate Drain

2

. . . . . . .

Step 4--Rig and Place Unit

2

. . . . . . . . . . . . . . . . . . . . . . . . .

POSITIONING

4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 5 — Make Electrical Connections

8

. . . . . . . . . . . . . . . .

FIELD POWER SUPPLY

8

. . . . . . . . . . . . . . . . . . . . . .

FIELD CONTROL WIRING

8

. . . . . . . . . . . . . . . . . . . .

HEAT ANTICIPATOR SETTINGS

8

. . . . . . . . . . . . . . .

Step 6 — Adjust Factory-Installed Options

22

. . . . . . . . . . .

PERFECT HUMIDITY

™

ADAPTIVE

DEHUMIDIFICATION SYSTEM

22

. . . . . . . . . . . . . .

DISCONNECT SWITCH

22

. . . . . . . . . . . . . . . . . . . . .

MANUAL OUTDOOR-AIR DAMPER

22

. . . . . . . . . .

CONVENIENCE OUTLET

22

. . . . . . . . . . . . . . . . . . .

OPTIONAL ECONOMI$ER IV

24

. . . . . . . . . . . . . . . .

ECONOMI$ER IV STANDARD SENSORS

25

. . . . . .

ECONOMI$ER IV CONTROL MODES

26

. . . . . . . . .

Step 7 — Adjust Evaporator-Fan Speed

31

. . . . . . . . . . . . . .

PRE--START--UP

48

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START--UP

48

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SERVICE

50

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING

57

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START--UP CHECKLIST

61

. . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.

Only trained and qualified service personnel should install, repair,
or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of

cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working

on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety

precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use

quenching cloth for unbrazing operations. Have fire extinguishers

available for all brazing operations.
Recognize safety information. This is the safety--alert symbol

. When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and

CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which

will

result in

severe personal injury or death. WARNING signifies a hazard

which

could

result in personal injury or death. CAUTION is used

to identify unsafe practices which

may

result in minor personal

injury or product and property damage. NOTE is used to
highlight suggestions which

will

result in enhanced installation,

reliability,or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal

injury or death.
Before performing service or maintenance operations

on unit, turn off main power switch to unit and install

lockout tag. Ensure electrical service to rooftop unit

agrees with voltage and amperage listed on the unit

rating plate.

!

WARNING

INSTALLATION

Unit is shipped in the vertical discharge configuration. To convert

to horizontal discharge application, remove duct opening covers.
Using the same screws, install covers on duct openings in

basepan of unit with insulation-side down. Seals around

openings must be tight. (See Fig. 1.)

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Summary

Page 2 - Step 1 —Provide Unit Support; Roof Curb; Ductwork; Horizontal Conversion Panels; Step 2 —Field Fabricate Ductwork; Do not connect ductwork to unit.; Step 3 —Install External Trap for Condensate; WARNING

2 Step 1 —Provide Unit Support Roof Curb Assemble and install accessory roof curb in accordance with instructions shipped with curb. (See Fig. 2.) Install insulation,cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb, not to the unit. If electric control powe...

Page 3 - Roof Curb Details

3 ROOF CURB ACCESSORY A UNIT SIZE CRRFCURB001A01 1 ˝ -2 ˝ [356] CRRFCURB002A01 2 ˝ -0 ˝ [610] NOTES: 1. Roof curb accessory is shipped disassembled. 2. Insulated panels. 3. Dimensions in [ ] are in millimeters. 4. Roof curb: galvanized steel. 5. Attach ductwork to curb (flanges of duct rest on curb)...

Page 4 - Condensate Drain Connection; Do not install unit in an indoor location; NOTE: Trap should be deep enough to offset maximum unit static; Condensate Drain Piping Details

4 MAXIMUM ALLOWABLE DIFFERENCE (in.) A-B B-C A-C 0.5 1.0 1.0 C06110 Fig. 3 --- Unit Leveling Tolerances DRAIN PLUG CONDENSATE PAN (SIDE VIEW) HORIZONTAL DRAIN OUTLET NOTE: Drain plug is shown in factory-installed position. C06003 Fig. 4 --- Condensate Drain Connection Positioning Maintain clearance ...

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