Bryant 551C - Manuals - manualsarea.com

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 ...

Page 5 - Rigging Details; Failure to follow this warning could result in personal

5 NOTES : 1. Place unit on curb as close as possible to the duct end. 2. Dimension in ( ) is in millimeters. 3. Hook rigging shackles through holes in base rail as shown in detail “A.” Holes in base rails are centered around the unit center of gravity. Use wooden top skid when rigging to prevent rig...

Page 8 - Make Electrical Connections; Do not use gas piping as an electrical; must

8 Step 5 — Make Electrical Connections ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death.Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground m...

Page 11 - Power Wiring Connections; Field Control Wiring Raceway

11 LEGEND C — Contactor COMP — Compressor IFC — Indoor (Evaporator) Fan Contactor NEC — National Electrical Code TB — Terminal Block 208/230-1-60 575-3-60 (SIZES 060 AND 072) 208/230-3-60 (SIZES 036 AND 048) 208/230-3-60 460-3-60 (SIZES 060 AND 072) 575-3-60 (SIZES 036 AND 048) 460-3-60 (SIZES 036 A...

Page 22 - Adjust Factory-Installed Options

22 Step 6 — Adjust Factory-Installed Options Perfect Humidity ™ Adaptive Dehumidification System Perfect Humidity system operation can be controlled by field installation of a Bryant--approved humidistat. (See Fig. 13.) NOTE : A light commercial Thermidistat ™ device (Fig. 14) can be used instead of...

Page 23 - CB; Typical Rooftop Unit with Perfect Humidity; Damper Installed

23 CB — Circuit Breaker CR — Cooling Relay DHR — Dehumidify Relay DSV — Discharge Solenoid Valve HR — Heater Relay LPS — Low Pressure Switch LSV — Liquid Solenoid Valve LTLO — Low Temperature LockoutField Splice Terminal (Unmarked)SpliceFactory WiringField Control WiringField Power Wiring LEGEND C06...

Page 24 - Typical Access Panel Locations

24 C06131 Fig. 19 --- Outdoor--Air Damper With Hood Attached C06132 Fig. 20 --- Outdoor--Air Damper Position Setting ECONOMI$ER IV CONTROLLER OUTSIDE AIR TEMPERATURE SENSOR LOW AMBIENT SENSOR ACTUATOR WIRING HARNESS C06021 Fig. 21 --- EconoMi$er IV Component Locations Optional EconoMi$er IV See Fig....

Page 27 - SENSOR; Enthalpy Sensor and Mounting Plate

27 Outdoor Enthalpy Changeover For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required. Replace the standard outdoor dry bulbtemperature sensor with the accessory enthalpy sensor in the same mounting location. (See Fig. 21.) When the outdoor air enthalpyrises above the ou...

Page 28 - O x

28 C06034 Fig. 33 --- EconoMi$er IV Controller Potentiometer and LED Locations Replace the standard outside air dry bulb temperature sensor withthe accessory enthalpy sensor in the same mounting location. (See Fig. 21.) Mount the return air enthalpy sensor in the return air duct. (See Fig. 35.) Wiri...

Page 29 - The factory default configuration for the EconoMi$er IV control

29 LED ON LED ON LED ON LED ON LED OFF 19 18 LED OFF LED OFF LED OFF 17 16 15 14 13 12 11 10 9 40 45 50 55 60 65 70 75 80 85 90 95 100 DEGREES FAHRENHEIT mA D C B A C06035 Fig. 34 --- Outside Air Temperature Changeover Set Points ECONOMI$ER IV ECONOMI$ER IV CONTROLLER GROMMET RETURN AIR SENSOR RETUR...

Page 30 - EconoMi$er IV Control; CO

30 A proportional anticipatory strategy should be taken with thefollowing conditions: a zone with a large area, varied occupancy, and equipment that cannot exceed the required ventilation rate atdesign conditions. Exceeding the required ventilation rate means the equipment can condition air at a max...

Page 32 - Perfect Humidity; UNIT

32 6000 5000 4000 3000 2000 1000 0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 DEL TA P IN. WG 4 & 5 ton 6 ton 3 ton C06133 Fig. 39 --- Perfect Humidity t Adaptive Dehumidification System Static Pressure Drop (in. wg) C06134 Fig. 40 --- Belt Drive Motor Mounting C06041 Fig. 41 --- Evaporator--Fan Pulley A...

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.

34 Table 14 — Evaporator-Fan Motor Efficiency MOTOR 551B EFFICIENCY 024, 036, 048 75 060 74/84* 072 84 *Single-phase/3-phase. NOTE: Convert watts to bhp using the following formula: watts input x motor efficiency bhp = 746 GENERAL FAN PERFORMANCE NOTES 1. Values include losses for filters, unit casi...

Page 48 - NOTE

48 PRE-START-UP FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage.1. Follow recognized safety practices and wear protective goggles when checking or servicing a refrigerant system. 2. Do not operate the compressor o...

Page 49 - Units With Perfect Humidity

49 Cooling Set the space thermostat to the OFF position. Set the systemselector switch at COOL position and the fan switch at AUTO position. Adjust the thermostat to a setting below room temperature. The compressor starts when contactor closes.Check cooling effects at a setting below room temperatur...

Page 50 - SERVICE; Cleaning

50 The liquid enters the evaporator coil at a temperature lower thanin standard cooling operation. This lower temperature increases the latent capacity of the rooftop unit. The refrigerant passesthrough the evaporator and is turned into a vapor. The air passing over the evaporator coil will become c...

Page 51 - Lubrication

51 4. Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash both sides of coil and flush with clean water. For best results,back-flush toward return-air section to remove foreignmaterial. Flush condensate pan after completion. 5. Reinstall economize...

Page 52 - EconoMi$er IV Adjustment; No Charge

52 Table 34—Perfect Humidity Adaptive Dehumidification System Sequence of Operation and System Response — Single Compressor Unit (551C 024--060, 551B 036--072) THERMOSTAT INPUT ECONOMIZER FUNCTION 551B,C UNIT OPERATION H Y1 Y2 OAT. < Economizer Set Point Economizer Comp. 1 Subcooling Mode Hot Gas...

Page 54 - Replacement Parts

54 C06144 Fig. 54 --- Cooling Charging Chart, 551B 048 with Optional Perfect Humidity Adaptive Dehumidification System NOTE : When using the charging charts, it is important that only the subcooling/reheat dehumidification coil liquid line solenoidvalve be energized. The subcooling/reheat dehumidifi...

Page 55 - 51C - 2 TON CHARGING CHART; Cooling Charging Chart,

55 551C - 2 TON CHARGING CHART 65.0 70.0 75.0 80.0 85.0 90.0 95.0 100.0 105.0 42 52 62 72 Suction Line Temp (deg F) S u ct io n L in e P ressu re (p sig ) 448.0 498.0 548.0 598.0 648.0 698.0 5.5 10.5 15.5 20.5 25.5 Suction Line Temperature (deg C) S u ct io n L in e P ressu re (k p a) F C 125 52 115...

Page 57 - TROUBLESHOOTING; Unit Troubleshooting

57 TROUBLESHOOTING Unit Troubleshooting Refer to Tables 35-37 for unit troubleshooting details. Economi$er IV Troubleshooting See Table 38 for EconoMi$er IV logic.A functional view of the EconoMi$er IV is shown in Fig. 61.Typical settings, sensor ranges, and jumper positions are also shown. An Econo...

Page 58 - EconoMi$er IV Troubleshooting Completion; This procedure is used to return the EconoMi$er IV to operation.; Table 35—Cooling Service Analysis

58 EconoMi$er IV Troubleshooting Completion This procedure is used to return the EconoMi$er IV to operation. No troubleshooting or testing is done by performing thefollowing procedure. 1. Disconnect power at TR and TR1.2. Set enthalpy potentiometer to previous setting.3. Set DCV maximum position pot...

Page 60 - EconoMi$er IV Functional View

60 C06053 Fig. 61 --- EconoMi$er IV Functional View 551B ,C

Page 61 - I. PRELIMINARY INFORMATION; ELECTRICAL; GENERAL

61 START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRE-START-UP (insert checkmark in box as each item is completed) j VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE j VERIFY THAT ALL PACKAGING MATERIALS...