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Bryant Preferred 551K 17 Series Installation Instructions Manual
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Bryant Preferred 551K 17 Series Installation Instructions Manual

Bryant Preferred 551K 17 Series Installation Instructions Manual

Single package rooftop cooling only with puron (r-410a) refrigerant and axion fan technology
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P r e f e r r e d ™ S e r i e s 5 5 1 K 1 7 - 2 8
Si n gl e P a c ka g e Roo ft o p C o ol i ng Onl y
with P ur on
®
(R -410A) R efri g erant
a n d A x i o n ™ F a n T e c h n o l o g y
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Job-Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . . . 19
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . . . 19
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . . 20
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . 24
Step 7 - Horizontal Duct Connection . . . . . . . . . . . . . . . 24
Step 9 - Assemble Barometric Hood . . . . . . . . . . . . . . . . 26
CONFIGURATION)
Step 11 - Make Electrical Connections . . . . . . . . . . . . . 28
• ALL UNITS
Perfect Humidity™ Control Connections . . . . . . . . . . . . 33
Typical Unit Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . 33
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53551033-01
Installation Instructions
Page
Printed in U.S.A.
Form No. II551K-17-28-02 Rev. B
• NORMAL COOLING
EconomizerONE (Factory Option) . . . . . . . . . . . . . . . . . . 40
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
EconomizerONE Occupancy Switch . . . . . . . . . . . . . . . . 61
Step 12 - Install Accessories . . . . . . . . . . . . . . . . . . . . . . 61
Step 13 - Fan Speed Set Up . . . . . . . . . . . . . . . . . . . . . . . 61
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . CL1

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
extinguisher available for all brazing operations.
It is important to 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,
CAUTION, and NOTE. 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 hazards 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.
Pg 1
3-24
Replaces: II551K-17-28-01

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Summary of Contents for Bryant Preferred 551K 17 Series

  • Page 1: Table Of Contents

    P r e f e r r e d ™ S e r i e s 5 5 1 K 1 7 - 2 8 Si n gl e P a c ka g e Roo ft o p C o ol i ng Onl y with P ur on ®...

  • Page 2: Electrical Shock Hazard

    GENERAL These installation instructions cover the 551K units with cooling only. Units are pre-wired and pre-charged with environmentally DANGER balanced Puron (R-410A) refrigerant at the factory. See Fig. 1 for ® model number nomenclature. See Fig. 2-16 for unit dimensions. ELECTRICAL SHOCK HAZARD See Fig.
  • Page 3 Unit Type Packaging and Control 551 = Cooling RTU with optional A = Standard Packaging, electromechanical Electric Heat, Preferred™ Series controls, no intake or exhaust option. Allows for use of all field-installed economizers, manual or two-position damper. Model G = Standard Packaging, electromechanical K = Puron ®...
  • Page 4 Fig. 2 — 551K*17 Vertical Airflow...
  • Page 5 Fig. 3 — 551K*17 Horizontal Airflow...
  • Page 6 Fig. 4 — 551K*17 Back View and Condensate Drain Location...
  • Page 7 Fig. 5 — 551K*17 Corner Weights and Clearances...
  • Page 8 Fig. 6 — 551K*17 Bottom View...
  • Page 9 Fig. 7 — 551K*20, 24 Vertical Airflow...
  • Page 10 Fig. 8 — 551K*20, 24 Horizontal Airflow...
  • Page 11 Fig. 9 — 551K*20, 24 Back View and Condensate Drain Location...
  • Page 12 Fig. 10 — 551K*20, 24 Corner Weights and Clearances...
  • Page 13 Fig. 11 — 551K*20, 24 Bottom View...
  • Page 14 Fig. 12 — 551K*28 Vertical Airflow...
  • Page 15 Fig. 13 — 551K*28 Horizontal Airflow...
  • Page 16 Fig. 14 — 551K*28 Back View and Condensate Drain Location...
  • Page 17 Fig. 15 — 551K*28 Corner Weights and Clearances...
  • Page 18 Fig. 16 — 551K*28 Bottom View...

  • Page 19: Installation

    INSTALLATION Install outdoor air hood Install smoke detector tube Job-Site Survey Install condensate line trap and piping Complete the following checks before installation. Make electrical connections Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installation 10.

  • Page 20: Slab Mount (Horizontal Units Only)

    ALTERNATE UNIT SUPPORT (IN LIEU OF CURB MOUNT) A non-combustible sleeper rail can be used in the unit curb sup- port area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 4 equally spaced 4 in. x 4 in. (102 mm x 102 mm) pads on each side.
  • Page 21 Fig. 19 — Roof Curb Details — Size 17 Units...
  • Page 22 Fig. 20 — Roof Curb Details — Size 20 and 24 Units...
  • Page 23 Fig. 21 — Roof Curb Details — Size 28 Units...

  • Page 24: Step 6 - Rig And Place Unit

    Step 6 — Rig and Place Unit Step 7 — Horizontal Duct Connection Keep unit upright and do not drop. Spreader bars are not required Depending on the unit size, see either Fig. 3 and 4 (size 17), Fig. 8 if top crating is left on the unit.

  • Page 25: Step 8 - Install Outside Air Hood (Factory Option)

    NOTE: 551K size 17 to 28 units are factory assembled as either Install each deflector (Item 8) on to each filter support dedicated horizontal or vertical units. These units cannot be field (Item 1) using the screws provided. converted. Apply seal strip to mating flanges on side panels of hood Field-supplied (3/4 in.) flanges should be attached to horizontal (Items 4 and 5).

  • Page 26: Step 9 - Assemble Barometric Hood

    Remove the side panels located in the hood parts box (see Fig. 31). Slide Into Insert Position Air Screen Fig. 31 — Barometric Hood Box Parts Location Install parts as shown in the following exploded view (see Fig. 27 — Outdoor Air Screen Installation Fig.

  • Page 27: Step 10 - Install External Condensate Trap And Line

    Unit Outside Air Hood 15" 40-1/2" Right 18 3/8" 16" 19-1/2" Hood Side 19 1/2" Hood Left Relief Return Hood Side Opening 1" Duct Fig. 36 — CRBARHOD001A00 Hood Sides and Top Fig. 34 — Relief Damper Caulk the backside of the mating flanges to ensure a watertight On the field installed economizer (CRECOMZR0**A00), a seal.

  • Page 28: Step 11 - Make Electrical Connections

    Minimum Pitch 1 in. (25 mm) Per Base Rail 10 ft (3 m) of Line Load 3 in. (76 mm) Side Open Vent Line Side See Note To Roof Drain Roof Detail A Drain Plug Curb NOTE: Trap should be deep enough to offset maximum unit static difference.

  • Page 29: All Units

    Measure the tip of the shaft to the outside surface of the Units Without Disconnect Option corner post to be 0.88 inches. Tighten the locking screw to secure the shaft to the NFD. Equip GR Lug Turn the handle to the OFF position with red arrow pointing at OFF.

  • Page 30: Convenience Outlets

    Such operation would invalidate any Mount the weatherproof cover to the backing plate as shown in applicable Bryant warranty. Fig. 44. Remove two slot fillers in the bottom of the cover to per- mit service tool cords to exit the cover. Check for full closing and latching.

  • Page 31: Factory-Option Thru-Base Connections (Electrical Connections)

    through the multi knock out by removing the appropriate size for the size of the fitting required. A 7/8 in. knock out is provided for low voltage. An additional 7/8 in. knock out is provided for a 115-v line which is used when the unit is equipped with the non- unit powered convenience outlet option.

  • Page 32: Electric Heaters

    See Fig. 48 for typical low voltage control connections. Heat Anticipator Settings Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second-stage heating. CAUTION Transformer Connection for 208-v Power Supply UNIT DAMAGE HAZARD All units except 208/230-v units are factory wired for the voltage shown on the nameplate.

  • Page 33: Perfect Humidity™ Control Connections

    The Perfect Humidity dehumidification system requires a field- supplied and installed space relative humidity control device. This Electric Heater Tracks device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination thermostat- humidistat control device such as a programmable thermostat de- vice with isolated contact set for dehumidification control.
  • Page 34 Programmable Thermostat Unit Control Board Thermostat Connections O/W2/B S RTN Fig. 54 — 551K*17-28 Unit with Perfect Humidity Dehumidification System with Programmable Thermostat...
  • Page 35 Fig. 55 — Typical 551K*17-28 Control Wiring Diagram, Electro-Mechanical with POL224 Controller...
  • Page 36 Fig. 56 — Typical 551K*20-24 Power Wiring Diagram, Electro-Mechanical Controller...
  • Page 37 Fig. 57 — Typical 551K*28 Power Wiring Diagram, Electro-Mechanical Controller...

  • Page 38: Perfect Humidity Dehumidification System (Optional)

    Perfect Humidity Dehumidification System (Optional) DEHUM/MECH COOLING (SUBCOOLING) MODE Units with the factory-installed Perfect Humidity system This mode increases the latent heat removal and decreases sen- option are capable of providing multiple modes of improved sible cooling compared to normal cooling. This occurs when dehumidification as a variation of the normal cooling cycle.
  • Page 39 Indoor Supply Valve 3-Wway Valve Condenser Coil Perfect Humidity Coil Outdoor Air Expansion Valve (TXV) Compressor Evaporator Coil = Closed Valve = Open Valve Indoor Return Air = 3-Way Valve Fig. 59 — Subcooling Mode – Perfect Humidity System for 551K*17-28 Indoor Supply Valve 3-Way...

  • Page 40: Economizerone (Factory Option)

    EconomizerONE (Factory Option) LED Indication NOTE: If different faulty events occur at the same time, the ECONOMIZER SETTINGS sensor/DAC LED lights up following this priority: Red  Interface Overview Yellow  Off. For example, if there is a humidity sensor error and air temperature failure at the same time, the sensor LED EconomizerONE turns red rather than yellow.
  • Page 41 Table 4 — LED Indication FREE SENSOR Power STATUS COOLING DAC LED Yellow Yellow Yellow Commissioning mode Blinking Blinking Blinking Power start-up Yellow On Yellow On Yellow On Free cooling is running Green On — — Free cooling is available Green —...
  • Page 42 Table 5 — Free Cooling Functions CONTROL MODE SENSORS USED ENABLE FREE COOLING? The outside air dry bulb temperature is compared with the set temperature OA (Outside Air) temperature sensor Control Mode 1 shutoff set point. • Fixed Dry Bulb If the outside air dry bulb temperature is below the temperature shutoff set MA (Mixed Air) temperature sensor point, then the outside air is used to meet all or part of the cooling demand.
  • Page 43 Table 6 — 1 and 2-Stage Cooling Stage I/O Logic Table 9 — Different Fan Speeds with Different Configured Outputs ECONOMIZER COOLING COOLING CONDITION MET STAGE 1 STAGE 2 FAN TYPE 1-SPEED COOLING 2-STAGE COOLING • Spd H (regardless of •...
  • Page 44 Table 11 — Different Damper Position Setting with Different Configured Outputs (DCV is Enabled) FAN TYPE 1-STAGE COOLING 2-STAGE COOLING • 2VENTMIN H to 2VENTMAX H (regardless of • 2VENTMIN H to 2VENTMAX H (regardless of 1-SPEED FAN cooling demand, OCC=Yes) cooling demand, OCC=Yes) •...
  • Page 45 • If Exhaust Fan 2 is connected and configured, then Fault Detection and Diagnostics Exhaust Fan 2 parameter group (L, M, and H) is available, The economizer controller can detect and diagnose free cool- depending on fan configuration. ing faults, sensor operation faults, and damper modulating •...

  • Page 46: Wiring

    WIRING WARNING Failure to follow this caution may result in damage to equipment. Be sure to allow enough time for compressor startup and shutdown between checkout tests so that the compressors do not short-cycle. Mounting Devices Connected to the Economizer Controller Devices like damper actuators, sensors (temperature sensor, hu- midity sensor, combination temperature and humidity sensor, CO sensor), thermostats, and exhaust fans can be connected to the...
  • Page 47 Table 13 — Economizer Control Wiring Settings LABEL TYPE DESCRIPTION RS485 Modbus A Line A RS485 Modbus B Line B ¬ GND_ISO Earth Ground Type II NTC 10K or 0-10 vdc Mixed or Discharge Air Temperature Sensor Mixed or Discharge Air Temperature Sensor Common Type II NTC 10K or 0-10 vdc Outside Air Temperature Sensor 0-10 vdc or 4-20mA...
  • Page 48 Connecting Peripheral Devices to the Economizer Controller See Fig. 68-72 for wiring details. • Outside Air: Connect to the Mixed or Discharge Air Temperature Sensor OAT and COM terminals of the Outside Air Temperature Sensor device. • Return Air (Differential): Return Air Temperature Sensor Connect to the RAT and S-COM...
  • Page 49 • Outside Combination Temperature/ Humidity: Connect Combo Temperature and Humidity Sensor to the OAT, COM, and OAH terminals of the device. • Combo Temperature and Humidity Sensor Return Combination Temperature/ Humidity: Connect to the RAT, S-COM, and RAH terminals of the device. Fig.

  • Page 50: Setup And Configuration

    SETUP AND CONFIGURATION NOTE: Parameters and display menus may display differently/ dynamically if different applications are configured. See Tables 14-21. IMPORTANT: Before setup and configuration, it is recom- mended to obtain some location-based values, such as shutoff points, or utilize the location services in the Climatix ™...
  • Page 51 Table 14 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates if the system can use outdoor air for free cooling. 1ECON ENAB Indicates if outdoor air is being used for the first stage of cooling. Indicates if the space is occupied. If users choose ALWAYS for 6OCC when configuring I/ Os, the parameter value is YES;...
  • Page 52 Table 15 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT Temperature shutoff set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick 2 TEMP OFF plugged into the Economizer Controller and the mobile application is 48...80°F;...
  • Page 53 Table 16 — Parameter Settings — Advanced PARAMETER DESCRIPTION VALUE/RANGE DEFAULT 3FREEZE POS Anti-freeze protection damper position (closed or minimum). 3SD ACT POS Damper position during shutdown (open or closed). MAT sensor location: • Choose MAT if the sensor is installed before the DX (Direct Expansion) coil. 3DIF T LOC •...
  • Page 54 Table 17 — Parameter Settings — I/O Configurations (cont) PARAMETER DESCRIPTION VALUE DEFAULT Choose ACT FB if feedback signal is available from the connected damper ACT FB 6AUX-AI2 ACT FB actuator. Otherwise, choose NONE. NONE Choose “COOL 2” if Cooling Stage 2 is available (another compressor is COOL 2 6Y2O COOL 2...

  • Page 55: Installing Optional Hh57Lw001 Single Outside Air Enthalpy Sensor

    Table 20 — Enter Running State PARAMETER DESCRIPTION 8RUN STATE Change to Running State. Press Enter to confirm the change. 8ENTER RUN? Confirm the change to Running State. Perform factory reset. Press Enter to confirm the reset. (This action resets the controller 8FACTORY DEF password to default: OneBT.) 8DEF CONFIRM?
  • Page 56 Fig. 73 — HH57LW001 Dimensional, Connection and Switching Information Fig. 74 — HH79NZ039 Dry Bulb and Mixed Air Sensor Wiring Economizer Actuator Outside Air (This End) Damper Wiring Harness Return Air Damper Fig. 75 — EconomizerONE System Component Locations Fig. 76 — California Title 24 Zones...
  • Page 57 U.S. and Canada I-Codes / ASHRAE Zones Climate Zone 1 Climate Zone 5 and Marine Climate Zone 2 Climate Zone 6 Climate Zone 3 Climate Zone 7 and 8 Climate Zone 4 (Except Marine) Fig. 77 — U.S. and Canada Climate Zones Table 22 —...
  • Page 58 Economizers are shipped standard with an HH79NZ039 outside Table 23 — California Title 24 Regional High Limit Dry air dry bulb sensor (refer to Fig. 74). System default setting (high Bulb Temperature Settings temp limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to REQUIRED HIGH LIMIT 27°C).

  • Page 59: Checkout

    CHECKOUT NOTE: All settings are stored in non-volatile flash memory. Status Inspect all wiring connections at the economizer module’s termi- nals, and verify compliance with the installation wiring diagrams. Use the Status menu (refer to Table 14) to check the parameter For checkout, review the Status of each configured parameter and values for the various devices and sensors configured.

  • Page 60: Troubleshooting

    TROUBLESHOOTING For EconomizerONE troubleshooting issues, see Table 25. Table 25 — Operating Issues and Concerns SYMPTOM REASON SOLUTION An alarm is displayed on the Sensor, damper, or the whole working Check sensor, damper, or the whole working system following the detailed alarm information. system may not work properly DAC LED is blinking RED Damper slippage...

  • Page 61: Smoke Detectors

    Smoke Detectors UNITS WITH ELECTRO-MECHANICAL CONTROLS Smoke detectors are available as factory-installed options on The fan speed set up controls are located on the lower section of 551K models. Smoke detectors may be specified for supply air the Unit Control Board (UCB). See Fig. 78. only, for return air without or with economizer, or in combination Check the job specifications for the CFM (cubic feet per min- of supply air and return air.
  • Page 62 ESP in. wg Factory Setting: Calculator 9.0 V 6000 Field Setting: 6500 Record field setting here 7000 7500 8000 Switch Range: 8500 9000 4.1 - 7.5 9500 10.0 6.9 - 8.7 10000 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range designed for maximum field adjustment potential.

  • Page 63: Start-Up Checklist

    START-UP CHECKLIST FOR 551K*17-28 SINGLE PACKAGE ROOFTOP, COOLING ONLY UNITS (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation Instruction document.
  • Page 64 PRESSURES Refrigerant Suction STAGE 1 _____________ PSIG STAGE 2 _____________ PSIG Refrigerant Discharge STAGE 1 _____________ PSIG STAGE 2 _____________ PSIG Verify Refrigerant Charge using Charging Charts (Y/N) _____ GENERAL Economizer minimum vent and changeover settings to job requirements (if equipped) (Y/N) _____ Verify smoke detector unit shutdown by utilizing magnet test (Y/N) _____...

This manual is also suitable for:

Preferred 551k 20 seriesPreferred 551k 24 seriesPreferred 551k 28 series