Bryant 551J User Manual

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551J

SINGLE PACKAGE ROOFTOP COOLING ONLY

SIZES 04 -- 06 with PURONR(R--410A) REFIRGERANT

Installation Instructions

NOTE: Read the entire instruction manual before starting

the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 1....................

INSTALLATION 5...............................

Step 1 -- Plan for Unit Location 5..................

Step 2 -- Plan for Sequence of Unit Installation 5......

Step 3 -- Inspect Unit 6...........................

Step 4 -- Provide Unit Support 6...................

Step 5 -- Field Fabricate Ductwork 8................

Step 6 -- Rig and Place Unit 8.....................

Step 7 -- Convert to Horizontal and Connect

Ductwork 9............................

Step 8 -- Install Outside Air Hood 9................

Step 9 -- Install External Condensate Trap

and Line 11............................

Step 10 -- Make Electrical Connections 11...........

Step 11 -- Adjust Factory--Installed Options 35........

Step 12 -- Install Accessories 36...................

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory--authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and appropriate national electrical codes (in USA, ANSI/NFPA70, National Electrical Code (NEC); in Canada, CSA C22.1) for special requirements.

It is important to recognize safety information. This is the safety--alert symbol

unit and in instructions or manuals, be alert to the potential for personal injury.

. When you see this symbol on the

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.

WARNING

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. Unit may have more than one power switch.

WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to follow this warning could cause personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Ware safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils.

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal

551J

injury, death and/or equipment damage. Puronr (R--410A) refrigerant systems operate at

higher pressures than standard R--22 systems. Do not use R--22 service equipment or components on Puron refrigerant equipment.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing equipment.

Vertical Connections / Economizer

551J

Horizontal Connections / Economizer

C10057

Fig. 1 -- Unit Dimensional Drawing

551J

C10058

Fig. 1 -- Unit Dimensional Drawing (cont.)

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (National

Electrical Code) ANSI/NFPA 70 for special installation requirements.

2. Determine unit location (from project plans) or select

unit location.

3. Check for possible overhead obstructions which may

interfere with unit lifting or rigging.

Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air.

Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.

Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements.RefertoStep9—InstallExternal Condensate Trap and Line – for required trap dimensions.

Roof mount —

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curb or other) that provides for minimum clearances required for safety (including clearance to combustible surfaces), unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 2.

18” (457)

42" (1067)

Required bottom condensate drain connection. Otherwise, 36” (914mm) for condensate connection.

Fig. 2 -- Service Clearance Dimensional Drawing

NOTE: Consider also the effect of adjacent units.

Unit may be installed directly on wood flooring or on Class A, B, or C roof--covering material when roof curb is used.

18" (457)

C07459

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb--mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Review the following for recommended sequences for installation steps.

Curb--mounted installation —

Install curb Install field--fabricated ductwork inside curb Install accessory thru--base service connection package

(affects curb and unit) (refer to accessory installation instructions for details)

Prepare bottom condensate drain connection to suit planned condensate line routing (refer to Step 9 for details)

Rig and place unit Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

551J

Table 1 – Operating Weights

551J UNITS LB (KG)

Component *04 *05 *06 Base Unit 458 (208) 545 (247) 550 (249) Economizer

Vertical 50 (23) 50 (23) 50 (23)

Horizontal 80 (36) 80 (36) 80 (36) Cu Fins 25 (11) 43 (20) 56 (25) Powered Outlet 32 (15) 32 (15) 32 (15) Curb

14--- in/356 mm 110 (50) 110 (50) 110 (50)

24--- in/610 mm 145 (66) 145 (66) 145 (66)

Pad--mounted installation —

Prepare pad and unit supports Check and tighten the bottom condensate drain

connection plug Rig and place unit Convert unit to side duct connection arrangement Install field--fabricated ductwork at unit duct openings Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Frame--mounted installation —

Frame--mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

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Step 3 — Inspect unit

Inspect unit for transportation damage. File any claim with transportation agency.

Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in Fig. 3. Assemble and install accessory roof curb in accordance with instructions shipped with the curb.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in Fig. 4. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and

not to the unit. The accessory thru--the--base power and gas connection package must be installed before the unit is set on the roof curb.

If electric and control wiring is to be routed through the basepan, attach the accessory thru--the--base service connections to the basepan in accordance with the accessory installation instructions.

NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 3. Improperly applied gasket can also result in air leaks and poor unit performance.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of 6 in. (150 mm) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Alternate Unit Support (In Lieu of Curb or Slab Mount) —

A non--combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced 4--in. x 4--in. (102 mm x 102 mm) pads on each side.

CONNECTOR

PKG. ACCY.

CRBTMPWR003A01

CRBTMPWR004A01

1’-4”

/16”

1’-9

[551]

[406]

D ALT

DRAIN

HOLE

/4”

[44.5]

POWER CONTROL

/4” [19] NPT

/4” [31.7]

/2” [12.7]

NPT

ACCESSORY

POWER

/2” [12.7]

NPT

ROOF CURB

ACCESSORY

CRRFCURB001A01

CRRFCURB002A01

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).

6. Service clearance: 4 ft on each side.

A UNIT SIZE

1’-2” [356]

551J*04-06

2’-0” [610]

7. Direction of airflow.

551J

C10059

Fig. 3 -- Roof Curb Details

For units with accessory electric heaters: Horizontal

applications require a minimum clearance to combustible surfaces of 1--in (25 mm) from duct for first 12--in (305 mm) away from unit. Vertical applications do not require a minimum clearance around ductwork.

Step 6 — Rig and Place Unit

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

A-B

0.5” (13)

B-C

1.0” (25)

Fig. 4 -- Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or

0.45 in. wg (112 Pa) without economizer.

551J

For vertical ducted applications, secure all ducts to roof curb and building structure on vertical ducted units. Do

not connect ductwork to unit.

Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

A-C

1.0” (25)

C06110

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. 5 for additional information.

Lifting holes are provided in base rails as shown in Fig. 5. Refer to rigging instructions on unit.

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

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.

If using top crate as spreader bar, once unit is set, carefully lower wooden crate off building roof top to ground. Ensure that no people or obstructions are below prior to lowering the crate.

C06005

UNIT

551J*04A 700 318 74.5 1890 36.5 925 33.5 850 551J*05A 830 377 74.5 1890 36.5 925 41.5 1055 551J*06A 865 393 74.5 1890 36.0 915 41.5 1055

NOTES:

1. Dimensions in ( ) are in millimeters.

2. 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 to prevent rigging straps from damaging unit.

MAX WEIGHT

LB KG IN MM IN MM IN MM

A B C

DIMENSIONS

Fig. 5 -- Rigging Details

PositioningonCurb—

Position unit on roof curb so that the following clearances are maintained:

/4in. (6.4 mm) clearance between the roof curb and the base rail inside the front and rear, 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 Fig. 3, section C--C.

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

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

Step 8 — Install Outside Air Hood

The outdoor hood components are shipped in a box located in the unit return air compartment behind the outdoor--ar opening access panel (or economizer). Access is through the filter access panel. See Fig. 7.

FILTERACCESS PANEL

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.

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. 6.

COMPRESSOR ACCESS PANEL

OUTDOOR-AIR OPENING AND INDOOR COIL ACCESS PANEL

C06023

Fig. 7 -- Typical Access Panel Locations

1. To remove the existing unit filter access panel, raise the panel and swing the bottom outward. The panel is now disengaged from the track and can be removed.

2. To remove the component box from its shipping position, remove the screw holding the hood box bracket to the top of the economizer. Slide the hood box out of the unit. See Fig. 8.

HOOD BOX BRACKET

551J

C06024

Fig. 8 -- Hood Box Removal

Motorized 2--Position Damper Hood —

1. Assemble outdoor--air hood top and side plates as shown in Fig. 9. Install seal strips on hood top and sides. Put aside screen retainer and screws for later

C06108

Fig. 6 -- Horizontal Conversion Panels

assembly.

2. Fasten hood top and side plate assembly to unit with screws provided. See Fig. 9.

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

3. Slide outdoor--air inlet screen into screen track on hood side plates. While holding screen) in place, fasten screen retainer to hood using screws provided.

4. Replace filter access panel. See Fig. 7.

and mastic in accordance with applicable codes.

SEAL STRIP

HOOD TOP

SEAL STRIP

HOOD SIDE

HOOD TOP

SEAL STRIP

OUTDOOR AIR INLET SCREEN

OUTDOOR-AIR HOOD – UNASSEMBLED

HOOD SIDE

SCREEN RETAINER

HOOD SIDE

SCREEN TRACKS

TRACKS FOR AIR INLET SCREEN

SIDE PANEL

TOP SIDE PANEL

INDOOR COIL ACCESS PANEL

CAULK HERE

Fig. 10 -- Indoor Coil Access Panel Relocation

C06025

551J

HOOD SIDES AND TOP ASSEMBLED

Fig. 9 -- Outdoor--Air Hood Details

Economizer Hood — NOTE: If the power exhaust accessory is to be installed

on the unit, the hood shipped with the unit will not be used and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly.

1. The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bottom of the indoor coil access panel. See Fig. 10.

2. Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 11.

3. Remove the shipping tape holding the economizer barometric relief damper in place.

4. Insert the hood divider between the hood sides. See Fig. 11 and 12. Secure hood divider with 2 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.

5. Open the filter clips which are located underneath the hood top. Insert the aluminum filter into the bottom filter rack (hood divider). Push the filter into position past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 12.

6. Caulk the ends of the joint between the unit top panel and the hood top.

7. Replace the filter access panel.

C07504

INDOOR COIL ACCESS PANEL

LEFT HOOD SIDE

19 1/16”

(483mm)

SCREW

HOOD DIVIDER

33 3/8”

(848mm)

Fig. 11 -- Economizer Hood Construction

DIVIDER

OUTSIDE AIR

HOOD

CLEANABLE

BAROMETRIC RELIEF

ALUMINUM FILTER

FILTER

Fig. 12 -- Economizer Filter Installation

TOP PANEL

FILTER CLIP

C06026

C06027

Step 9 — Install External Condensate Trap

and Line

The unit has one3/4-in. condensate drain connection on the end of the condensate pan and an alternate connection on the bottom. See Fig. 13. Unit airflow configuration does not determine which drain connection to use. Either drain connection can be used with vertical or horizontal applications.

CONDENSATE PAN (SIDE VIEW)

STANDARD SIDE DRAIN

DRAIN

PLUG

(FACTORY-INSTALLED)

Fig. 13 -- Condensate Drain Pan (Side View)

When using the standard side drain connection, ensure the red plug in the alternate bottom connection is tight. Do this before setting the unit in place. The red drain pan plug can

be tightened with a

/2--in. square socket drive extension.

To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a square socket drive extension) and install it in the side drain connection.

The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 14.

MINIMUM PITCH 1” (25mm) PER 10’ (3m) OF LINE

TO ROOF DRAIN

BASE RAIL

OPEN VENT

2˝ (51) MIN

ALTERNATE BOTTOM DRAIN

C08021

/2-- i n .

SEE NOTE

Step 10 — Make Electrical Connections

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code); ANSI/NFPA 70, latest edition (in Canada, Canadian Electrical Code CSA [Canadian Standards Association] C22.1), and local electrical codes.

NOTE: Check all factory and field electrical connections for tightness. Field--supplied wiring shall conform with the limitations of 63_F(33_C) rise.

Field Power Supply —

If equipped with optional Powered Convenience Outlet: The power source leads to the convenience outlet’s transformer primary are not factory connected. Installer must connect these leads according to required operation of the convenience outlet. If an always--energized convenience outlet operation is desired, connect the source leads to the line side of the unit--mounted disconnect. (Check with local codes to ensure this method is acceptable in your area.) If a de--energize via unit disconnect switch operation of the convenience outlet is desired, connect the source leads to the load side of the unit disconnect. On a unit without a unit--mounted disconnect, connect the source leads to compressor contactor C and indoor fan contactor IFC pressure lugs with unit field power leads.

Refer to Fig. 19 for power transformer connections and the discussion on connecting the convenience outlet on page 12.

551J

ROOF

DRAIN PLUG

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended.

CURB

Fig. 14 -- Condensate Drain Piping Details

C08022

Field power wires are connected to the unit at line--side pressure lugs on compressor contactor C and indoor fan contactor IFC (see wiring diagram label for control box component arrangement) or at factory--installed option non--fused disconnect switch. Max wire size is #2 AWG (copper only). (See Fig. 15.)

NOTE: TEST LEADS -- Unit may be equipped with

All units must have an external trap for condensate drainage. Install a trap at least 4-in. (102 mm) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do not use a pipe size smaller than the unit connection

/4-in.).

(

short leads (pigtails) on the field line connection points on contactor C or optional disconnect switch. These leads are for factory run--test purposes only; remove and discard before connecting field power wires to unit connection points. Make field power connections directly to line connection pressure lugs only.

Disconnect

per

NEC

208/230-1-60

Units Without Disconnect Option

1-ph Belt Drive IFM

C IFC

Disconnect

208/230-3-60

460-3-60 575-3-60

13 13

per

NEC

L2 L3

Units With Disconnect Option

Direct Drive IFM

Units Without Factory--Installed Disconnect —

When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

All units —

All field wiring must comply with NEC and all local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 15 and the unit label diagram for power wiring connections to the unit power terminal blocks and equipment ground. Maximum wire size is #2 ga AWG per pole.

551J

Optional

Disconnect

Disconnect factory test leads; discard.

Switch

Fig. 15 -- Power Wiring Connections

Units with Factory--Installed Disconnect —

The factory--installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel. Discard the factory test leads (see Fig. 15).

WARNING

FIRE HAZARD

Failure to follow this warning could result in intermittent operationor performance satisfaction.

Do not connect aluminum wire between disconnect switch and 551J unit. Use only copper wire. (See Fig. 16.)

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

Factory Wiring

C10056

Provide a ground--fault and short--circuit over--current protection device (fuse or breaker) per NEC Article 440 (or local codes). Refer to unit informative data plate for MOCP (Maximum Over--current Protection) device size.

All field wiring must comply with the NEC and local requirements.

All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is

to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire

with the connection and moving it to the 200-v

/4-in. female spade connector from the 230--v

/4-in. male

terminal on the primary side of the transformer. Refer to

unit label diagram for additional information. Field power wires will be connected line--side pressure lugs on the power terminal block or at factory--installed option non--fused disconnect.

NOTE: Check all factory and field electrical connections for tightness. Field--supplied wiring shall conform with the limitations of 63_F(33_C) rise.

Convenience Outlets —

WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Tag--out this switch, if necessary.

ALUMINUM

WIRE

Fig. 16 -- Disconnect Switch and Unit

A93033

Two types of convenience outlets are offered on 551J models: Non--powered and unit--powered. Both types provide a 125-volt GFCI (ground--fault circuit--interrupter) duplex receptacle rated at 15--A behind a hinged waterproof access cover, located on the end panel of the unit. See Fig. 17.

Pwd-CO

Convenience

Outlet

GFCI

Pwd-CO

Fuse

Switch

Control Box

Access Panel

Transformer

C08128

Fig. 17 -- Convenience Outlet Location

Installing Weatherproof Cover –

A weatherproof while-in-use cover for the factory-installed convenience outlets is now required by UL standards. This cover cannot be factory-mounted due its depth; it must be installed at unit installation. For shipment, the convenience outlet is covered with a blank cover plate.

The weatherproof cover kit is shipped in the unit’s control box. The kit includes the hinged cover, a backing plate and gasket.

Non--powered type: This type requires the field installation of a general--purpose 125--volt 15--A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and location. Route 125--v power supply conductors into the bottom of the utility box containing the duplex receptacle.

Unit--powered type: A unit--mounted transformer is factory--installed to stepdown the main power supply voltage to the unit to 115--v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the unit’s control box access panel. See Fig. 17.

The primary leads to the convenience outlet transformer are not factory--connected. Selection of primary power source is a customer--option. If local codes permit, the transformer primary leads can be connected at the line--side terminals on the unit--mounted non--fused disconnect or HACR breaker switch; this will provide service power to the unit when the unit disconnect switch or HACR switch is open. Other connection methods will result in the convenience outlet circuit being de--energized when the unit disconnect or HACR switch is open. See Fig. 19.

551J

DISCONNECT ALL POWER TO UNIT AND CONVENIENCE OUTLET.

Remove the blank cover plate at the convenience outlet; discard the blank cover.

Loosen the two screws at the GFCI duplex outlet, until

approximately

/2-in (13 mm) under screw heads are exposed. Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align with the gasket; tighten the two screws until snug (do not over-tighten).

Mount the weatherproof cover to the backing plate as shown in Fig. 18. Remove two slot fillers in the bottom of the cover to permit service tool cords to exit the cover. Check for full closing and latching.

COVER – WHILE-IN-USE WEATHERPROOF

RECEPTACLE NOT INCLUDED

UNIT

VOLTAGE

208, 230

460 480

575 600

CONNECT

240

PRIMARY

CONNECTIONS

L1: RED +YEL L2: BLU + GRA

L1: RED Splice BLU + YEL L2: GRA

L1: RED L2: GRA

TRANSFORMER

TERMINALS

Fig. 19 -- Powered Convenience Outlet Wiring

C08283

H1 + H3 H2 + H4

H2 + H3

H1 H2

Fuse on power type: The factory fuse is a Bussman “Fusetron” T--15, non--renewable screw--in (Edison base) type plug fuse.

BASE PLATE FOR GFCI RECEPTACLE

C09022

Fig. 18 -- Weatherproof Cover Installation

NOTICE

Convenience Outlet Utilization

Maximum Intermittent use : 15 Amps 2 to 3 Hours

Maximum Continuous use : 8 Amps 24/7

50HJ542739 3.0

Fig. 20 -- Convenience Outlet Utilization Notice Label

Duty Cycle: the unit--powered convenience outlet has a duty cycle limitation. The transformer is intended to provide power on an intermittent basis for service tools, lamps, etc; it is not intended to provide 15--amps loading for continuous duty loads (such as electric heaters for overnight use). Observe a 50% limit on circuit loading above 8--amps.

Convenience outlet usage rating:

551J

Continuous usage: 8 amps maximum Intermittent usage: up to 15 amps maximum for

up to 2 hours maximum

Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition.

A9225

hole must be field cut in the main control box bottom on the left side so the 24--v control connections can be made. Connect the control power conduit to the unit control box at this hole.

Units without Thru--Base Connections —

1. Install power wiring conduit through side panel openings. Install conduit between disconnect and control box.

2. Install power lines to terminal connections as shown in Fig. 15.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. See Table 4. On 3--phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 5, Note 2 to determine the percent of voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Bryant warranty.

Field Control Wiring —

The 551J unit requires an external temperature control device. This device can be a thermostat emulation device provided as part of a third--party Building Management System.

Factory--Option Thru--Base Connections —

This service connection kit consists of a

bulkhead connector and a

/4--in electrical bulkhead

/2--in electrical

connector, all factory--installed in the embossed (raised) section of the unit basepan in the condenser section. The

/4--in bulkhead connector enables the low--voltage control

wires to pass through the basepan. The

/2--in electrical bulkhead connector allows the high--voltage power wires to pass through the basepan. See Fig. 21.

LOW VOLTAGE CONDUIT CONNECTOR

HIGH VOLTAGE CONDUIT CONNECTOR

C08637

Fig. 21 -- Thru--Base Connection Fittings

Check tightness of connector lock nuts before connecting electrical conduits.

Field--supplied and field--installed liquid tight conduit connectors and conduit may be attached to the connectors on the basepan. Pull correctly rated high voltage and low voltage through appropriate conduits. Connect the power conduit to the internal disconnect (if unit is so equipped) or to the external disconnect (through unit side panel). A

Thermostat —

Install a Bryant--approved accessory thermostat according to installation instructions included with the accessory. For complete economizer function, select a two--stage cooling thermostat. Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24--v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24--v source (no “C” connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable.

Using unit--mounted convenience outlets: Units with unit--mounded convenience outlet circuits will often require that two disconnects be opened to de--energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de--energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets.

For wire runs up to 50 ft. (15 m), use no. 18 AWG (American Wire Gage) insulated wire [35_C(95_F) minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated wire [35_C(95_F) minimum]. For over 75 ft. (23 m), use no. 14 AWG insulated wire [35_C(95_F) minimum]. All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

Typical

Thermostat

Connections

Central

Terminal

Board

NOTE: If thru--the--bottom connections accessory is used, refer to the accessory installation instructions for information on routing power and control wiring.

Heat Anticipator Settings —

O/B/Y2

(Note 1) (Note 2)

Note 1: Typical multi-function marking. Follow manufacturer’s configuration Instructions to select Y2.

Note 2: Y2 to Y2 connection required on single-stage cooling units when integrated economizer function is desired.

Field Wiring

T H E R M O S T A T

C08069

Fig. 22 -- Low--Voltage Connections

Unit without thru--base connection kit —

Pass the thermostat control wires through the hole provided in the corner post; then feed the wires through the raceway built into the corner post to the control box. Pull the wires over to the terminal strip on the upper--left corner of the Controls Connection Board. See Fig. 23.

RACEWAY

Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second--stage heating, when available.

Electric Heaters

551J units may be equipped with field--installed accessory electric heaters. The heaters are modular in design, with heater frames holding open coil resistance wires strung through ceramic insulators, line--break limit switches and a control contactor. One or two heater modules may be used in a unit.

Heater modules are installed in the compartment below the indoor (supply) fan outlet. Access is through the indoor access panel. Heater modules slide into the compartment on tracks along the bottom of the heater opening. See Fig. 24, Fig. 25 and Fig. 26.

DISCONNECT MOUNTING LOCATION

UNIT BLOCK-OFF PAN EL

OUTDOOR ACCESS PANEL

Fig. 24 -- Typical Access Panel Location (3--6 Ton)

INDOOR ACCESS PAN EL

C08133

551J

Not all available heater modules may be used in every unit. Use only those heater modules that are UL listed for use in a specific size unit. Refer to the label on the unit cabinet for the list of approved heaters.

Unit heaters are marked with Heater Model Numbers. But heaters are ordered as and shipped in cartons marked with a corresponding heater Sales Package part number. See Table 2 for correlation between heater Model Number and

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 23 -- Field Control Wiring Raceway

Sales Package part number. NOTE: The value in position 9 of the part number differs

between the sales package part number (value is 1) and a bare heater model number (value is 0).

Table 2 – Heater Model Number

Bare Heater Model Number C R H E A T E R 0 0 1 A 0 0

Heater Sales Package PNO Includes:

Bare Heater Carton and packing materials Installation sheet

C R H E A T E R 1 0 1 A 0 0

551J

DISCONNECT MOUNTING LOCATION

MAIN CONTROL BOX

BRACKET AND CONDUIT DRIP BOOT

EMT OR RIGID CONDUIT (FIELD-SUPPLIED)

SINGLE POINT BOX MOUNTING SCREW

SINGLE POINT BOX

HEATER MODULE (LOCATION 1)

CENTER

MANUAL RESET

POST

LIMIT SWITCH

HEATER MODULE (LOCATION 2)

CONTROL WIRE TERMINAL BLOCK

Fig. 25 -- Typical Component Location

HEATER COVERS

HEATER MOUNTING BRACKET

C08134

TRACK

FLANGE

CONTROL BOX

BUSHING

SINGLE POINT BOX MOUNTING SCREWS

DRIP BOOT BRACKET MOUNTING SCREWS

POWER WIRES

FOAM BUSHING

HEATER RELAYS

HEATER MOUNTING SCREWS

A L

L I

E D

P A

C O

R P .

M O D

E L

O .

ER I

A L

N O.

2 2

. 2

ISTED

NDITIONING

UIP

ACCESS 3 4

/ N

6 10-

REV

C08136

Fig. 27 -- Typical Single Point Installation

Low--Voltage Control Connections — Pull the

low--voltage control leads from the heater module(s) -VIO and BRN (two of each if two modules are installed; identify for Module #1) -- to the 4--pole terminal board TB4 located on the heater bulkhead to the left of Heater #1. Connect the VIO lead from Heater #1 to terminal TB4--1. For 2 stage heating, connect the VIO lead from Heater #2 to terminal TB4--2. For 1 stage heating with 2 heater modules connect the VIO lead from both Heater #1 and #2 to terminal TB4--1. Connect both BRN leads to terminal TB4--3. See Fig. 28.

C08135

Fig. 26 -- Typical Module Installation

Single Point Boxes and Supplementary Fuses — When

the unit MOCP device value exceeds 60--A, unit--mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the outdoor section. The Single Point Box has a hinged access cover. See Fig. 27. The Single Point Box also includes a set of power taps and pigtails to complete the wiring between the Single Point Box and the unit’s main control box terminals. Refer to the accessory heater and Single Point Box installation instructions for details on tap connections.

All fuses on 551J units are 60--A. (Note that all heaters are qualified for use with a 60--A fuse, regardless of actual heater ampacity, so only 60--A fuses are necessary.)

Single Point Boxes without Fuses — Unit heater applications not requiring supplemental fuses require a special Single Point Box without any fuses. The accessory Single Point Boxes contain a set of power taps and pigtails to complete the wiring between the Single Point Box and the unit’s main control box terminals. Refer to accessory heater and Single Point Box installation instructions for details on tap connections.

CTB

CONTL BOARD

Field

TB4

VIO

ORN

BRN

ORN

VIO

Connections

Elec Htr

VIO

HR2

VIO

HR1

HR1: On Heater 1 in Position #1 HR2: On Heater 2 in Position #2 (if installed)

Fig. 28 -- Accessory Electric Heater Control

Connections

BRN

C08331

Smoke Detectors —

Smoke detectors are available as factory--installed options on 551J models. Smoke detectors may be specified for Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air. Return Air smoke detectors are arranged for vertical return configurations only. All components necessary for operation are factory--provided and mounted. The unit is factory--configured for immediate smoke detector shutdown operation; additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements.

Units equipped with factory--optional Return Air smoke detectors require a relocation of the sensor module at unit installation. See “Completing Installation of Return Air Smoke Sensor:” on page 19 for details.

Controll er housing

and electronics

Conduit c ouplings

(supplie d by installer)

Duct smoke sensor

controller

Fastener

(2X)

Conduit nuts

(supplie d by installer)

Conduit s upport plate

Terminal block cover

Cover gasket

(ordering option)

Controll er cover

System

The smoke detector system consists of a four--wire controller and one or two sensors. Its primary function is to shut down the rooftop unit in order to prevent smoke from circulating throughout the building. It is not to be used as a life saving device.

Controller

The controller (see Fig. 29) includes a controller housing, a printed circuit board, and a clear plastic cover. The controller can be connected to one or two compatible duct smoke sensors. The clear plastic cover is secured to the housing with a single captive screw for easy access to the wiring terminals. The controller has three LEDs (for Power, Trouble and Alarm) and a manual test/reset button (on the cover face).

Sensor

The sensor (see Fig. 30) includes a plastic housing, a printed circuit board, a clear plastic cover, a sampling tube inlet and an exhaust tube. The sampling tube (when used) and exhaust tube are attached during installation. The sampling tube varies in length depending on the size of the rooftop unit. The clear plastic cover permits visual inspections without having to disassemble the sensor. The cover attaches to the sensor housing using four captive screws and forms an airtight chamber around the sensing electronics. Each sensor includes a harness with an RJ45 terminal for connecting to the controller. Each sensor has four LEDs (for Power, Trouble, Alarm and Dirty) and a manual test/reset button (on the left--side of the housing).

See

Detail A

Intake

gasket

Plug

Alarm

Fig. 29 -- Controller Assembly

Duct smoke sensor

Exhaust tube

TSD-CO2

(ordering option)

Sampling tube

(ordered separately)

Exhaust gasket

Coupling

Sensor housing and electro nics

Troub le

Power

Test/reset switch

(ordering option)

551J

C08208

Cover gasket

Sensor cover

Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a (shorter) exhaust tube. The difference in air pressure between the two tubes pulls the sampled air

Magnetic test/reset

switch

through the sensing chamber. When a sufficient amount of smoke is detected in the sensing chamber, the sensor signals an alarm state and the controller automatically takes the appropriate action to shut down fans and blowers, change over air handling systems, notify the fire

Alarm

Troub le

Fig. 30 -- Smoke Detector Sensor

Power Dirty

C08209

alarm control panel, etc.

The sensor uses a process called differential sensing to

prevent gradual environmental changes from triggering false alarms. A rapid change in environmental conditions, such as smoke from a fire, causes the sensor to signal an alarm state but dust and debris accumulated over time does not.

For installations using two sensors, the duct smoke detector does not differentiate which sensor signals an alarm or trouble condition.

Smoke Detector Locations

Supply Air — The Supply Air smoke detector sensor is located to the left of the unit’s indoor (supply) fan. See Fig. 31. Access is through the fan access panel. There is no sampling tube used at this location. The sampling tube inlet extends through the side plate of the fan housing (into a high pressure area). The controller is located on a bracket to the right of the return filter, accessed through the lift--off filter panel.

551J

Smoke Detector Sensor

Return Air Detector module (shipping position shown)*

Controller module

Return Air Detector Sampling Tube

*RA detector must be moved from shipping position to operating position by installer

C07307

Fig. 32 -- Typical Return Air Detector Location

Return Air with Economizer — The sampling tube is inserted through the side plates of the economizer housing, placing it across the return air opening on the unit basepan. See Fig. 33. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat--mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See the following installation procedure.)

C08245

Fig. 31 -- Typical Supply Air Smoke Detector Sensor

Location

Return Air without Economizer — The sampling tube is located across the return air opening on the unit basepan. See Fig. 32. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat--mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See “Completing Installation of Return Air Smoke Sensor:” for details.)

Return Air Sampling Tube

C08129

Fig. 33 -- Return Air Sampling Tube Location

Completing Installation of Return Air Smoke

Sensor:

1. Unscrew the two screws holding the Return Air Sensor detector plate. See Fig. 34. Save the screws.

2. Remove the Return Air Sensor and its detector plate.

3. Rotate the detector plate so the sensor is facing outwards and the sampling tube connection is on the bottom. See Fig. 35.

4. Screw the sensor and detector plate into its operating position using screws from Step 1. Make sure the sampling tube connection is on the bottom and the exhaust tube is on the top. See Fig. 35.

5. Connect the flexible tube on the sampling inlet to the sampling tube on the basepan.

Screws

Flexible Exhaust Tubes

C08127

Fig. 35 -- Return Air Sensor Operating Position

Additional Application Data — Refer to Catalog No. HKRNKA--1XA for discussions on additional control features of these smoke detectors including multiple unit coordination.

551J

Sample Tube

Fig. 34 -- Return Air Detector Shipping Position

C08126

RTU--MP control system —

The RTU--MP controller, see Fig. 36, provides expanded stand--alone operation of the HVAC system plus connection and control through communication with several Building Automation Systems (BAS) through popular third--party network systems. The available network systems are BACnet MP/TP, Modbus and Johnson J2. Communication with LonWorks is also possible by adding an accessory interface card to the RTU--MP. Selection of the communication protocol and baud rate are made at on--board DIP switches.

551J

The RTU--MP control is factory--mounted in the 551J unit’s main control box, to the left of the CTB. See Fig. 37. Factory wiring is completed through harnesses connected to the CTB. Field connections for RTU--MP sensors will be made at the Phoenix connectors on the RTU--MP board. The factory--installed RTU--MP control includes the supply--air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$er2 package.

Refer to Table 2, RTU--MP Controller Inputs and Outputs for locations of all connections to the RTU--MP board.

C07129

Fig. 36 -- RTU--MP Multi--Protocol Control Board

C10049

Fig. 37 -- 551J Control Box Component Locations

551J

C10044

Fig. 38 -- RTU--MP System Control Wiring Diagram

Table 3 – RTU--MP Controller Inputs and Outputs

POINT NAME

Space Temperature Sensor sptsens AI (10K Thermistor) J 20 --- 1 , 2

Supply Air Temperature sat AI (10K Thermistor) J2 --- 1, 2

Local Outside Air Temperature Sensor oatsens AI (10K Thermistor) J2 ---3, 4

Space Temperature Offset Pot sptopot AI (100K Potentiometer) J 2 0 --- 3

Indoor Air Quality iaq A I ( 4 --- 2 0 m a ) J4---2, 3

Outdoor Air Quality oaq A I ( 4 --- 2 0 m a ) J4---5, 6

Safety Chain Feedback safety DI (24 VAC) J1---9

Compressor Safety compstat DI (24 VAC) J1--- 2

Fire Shutdown firedown DI (24 VAC) J 1 --- 1 0

Enthalpy Switch enthalpy DI (24 VAC) J2--- 6, 7

Humidistat Input Status humstat DI (24 VAC) J5 --- 7, 8

551J

Space Relative Humidity sprh A I ( 4 --- 2 0 m a )

Outside Air Relative Humidity oarh A I ( 4 --- 2 0 m a )

Supply Fan Status fanstat DI (24 VAC)

Filter Status filtstat DI (24 VAC)

Remote Occupancy Input remocc DI (24 VAC)

Economizer Commanded Position econocmd 4---20ma J2--- 5

SupplyFanRelayState sf DO Relay (24VAC , 1A) J1---4

Compressor 1 Relay State comp_1 DO Relay (24VAC , 1A) J1---8

Compressor 2 Relay State comp_2 DO Relay (24VAC , 1A) J1---7

Heat Stage 1 Relay State heat_1 DO Relay (24VAC , 1A) J1---6

Heat Stage 2 Relay State heat_2 DO Relay (24VAC , 1A) J1---5

Power Exhaust Relay State aux_2 DO Relay (24VAC , 1A) J1 1 --- 3

Dehumidification Relay State humizer DO Relay (24VAC, 1A) J 1 1 --- 7 , 8

LEGEND AI --- A n a l o g I n p u t AO --- A n a l o g O u t p u t DI --- D i s c r e t e I n p u t DO --- Discrete Output

* These inputs (if installed) take the place of the default input on the specific channel according to schematic. P a r a l l e l p i n s J 5 --- 1 = J 2 --- 6 , J 5 --- 3 = J 1 --- 1 0 , J 5 --- 5 = J 1 --- 2 a r e u s e d f o r f i e l d --- i n s t a l l a t i o n .

BACnet OBJECT

NAME

INPUTS

CONFIGURABLE INPUTS*

OUTPUTS

TYPE OF I/O

CONNECTION PIN

NUMBERS

J 4 --- 2 , 3 o r J 4 --- 5 , 6

J5---1,2 or J5 --- 3,4 or

J5 5,6 or J5 --- 7,8

The RTU--MP controller requires the use of a Byrant space sensor. A standard thermostat cannot be used with the RTU--MP system.

Supply Air Temperature (SAT) Sensor -- On FIOP--equipped 551J unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inches (12.7 mm) in length. It is a nominal 10--k ohm thermistor.

The SAT is factory--wired. The SAT probe is wire--tied to the supply--air opening (on the horizontal opening end) in its shipping position. Remove the sensor for installation.

SUPPLY AIR TEMPERATURE SENSOR

SUPPLY AIR

RETURN AIR

ROOF CURB

Re--position the sensor in the flange of the supply--air opening or in the supply air duct (as required by local

codes). Drill or punch a Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. See Fig. 39.

/2--in. hole in the flange or duct.

C08200

Fig. 39 -- Typical Mounting Location for Supply Air

Temperature (SAT) Sensor on Small Rooftop Units

Outdoor Air Temperature (OAT) Sensor -- The OAT is

factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 -- The RTU--MP control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU--MP control; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors) Space CO

Outdoor air CO

sensor

Field Connections -- Field connections for accessory sensors and input devices are made the RTU--MP, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU--MP must be routed through the raceway built into the corner post as shown in Fig. 23. The raceway provides the UL required clearance between high-- and low--voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU--MP. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board.

Space Temperature (SPT) Sensors

A field--supplied Byrant space temperature sensor is required with the RTU--MP to monitor space temperature. There are 3 sensors available for this application:

S 33ZCT55SPT, space temperature sensor with override

button

S 33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment

S 33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and setpoint adjustment

Use 20 gauge wire to connect the sensor to the controller. The wire is suitable for distances of up to 500 ft. Use a three--conductor shielded cable for the sensor and setpoint adjustment connections. If the setpoint adjustment (slidebar) is not required, then an unshielded, 18 or 20 gauge, two--conductor, twisted pair cable may be used.

SW1

SEN

RED(+)

WHT(GND)

BLK(-)

BRN (GND)

BLU (SPT)

CCN COM

SENSOR WIRING

C08201

Fig. 40 -- T--55 Space Temperature Sensor Wiring

SEN

J20-1

J20-2

C08460

Fig. 41 -- RTU--MP T--55 Sensor Connections

Connect T--56 -- See Fig. 42 for T--56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to RTU--MP J20--1, J20--2 and J20--3 per Fig. 43.

SW1

SEN

RED(+)

WHT(GND)

BLK(-)

SET

BLK (T56)

BRN (GND) BLU (SPT)

CCN COM

SENSOR WIRING

JUMPER TERMINALS AS SHOWN

551J

Connect T--55 -- See Fig. 40 for typical T--55 internal connections. Connect the T--55 SEN terminals to RTU--MP J20--1 and J20--2. See Fig. 41.

Cool Warm

C08202

Fig. 42 -- T--56 Internal Connections

SEN J20-1

SEN

Jumper

J20-2

SET

Locate the enthalpy control in the economizer next to the Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 45. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).

SET

J20-3

Fig. 43 -- RTU--MP T--56 Sensor Connections

Connect T--59 -- The T--59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 44 for internal connections at the T--59. Connect the SEN terminal (BLU) to RTU--MP J20--1. Connect the COM terminal (BRN) to J20--2. Connect the SET terminal (STO or BLK) to J20--3.

551J

OR SET SEN

OPB C OM- P WR+

NOTE: Must use a separate isolated transformer.

BRN (COM)

BLK (STO)

BLU (SPT)

24 VAC

SENSOR

WIRING

POWER WIRING

Fig. 44 -- Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

C08461

C07132

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

Differential Enthalpy Control — Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor.

Return Air Enthalpy Sensor — Mount the return--air enthalpy sensor (33CSENTSEN) in the return--air section of the economizer. The return air sensor is wired to the enthalpy controller (33CSENTHSW). See Fig. 46.

– 4-20 Main

+ VDC Out

+ 24-36 VDC In

– 4-20 Main Out

GND

LOW

RED

BLK

GRA

ESL

ECONO MOTOR

C09027

24V

Fig. 46 -- Outside and Return Air Enthalpy Sensor

Wiring

Economizer controls —

Outdoor Air Enthalpy Control (PNO 33CSENTHSW) --

The enthalpy control (33CSENTHSW) is available as a field--installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field--installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 45.)

Enthalpy Switch

24V

GND

LOW

RED

BLK

GRA

ESL

ECONO MOTOR

CTB ECON

Factory Wiring Harness

C09026

Fi g. 45 -- Enthalpy Switch (33CSENTHSW) Connections

To wire the return air enthalpy sensor, perform the following:

1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller.

2. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (+) terminal on the enthalpy controller. Connect the BLK wire to (--) spade connector on the return air enthalpy sensor and the (--) terminal on the enthalpy controller.

Indoor Air Quality (CO

sensor) — The indoor air quality

sensor accessory monitors space carbon dioxide (CO levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO

The CO

present in the space air.

sensors are all factory set for a range of 0 to

2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO

sensor for electrical

)

requirements and terminal locations. See Fig. 47 for

typical CO

sensor wiring schematic.

IAQ Sensor

SEN

J4-2

0-10VDC

SIG COM

4-20mA

ALARM

NC COM

RELAY

}

CONTACTS

24 VAC

24 VDC

J3 J4

C08635

Fig. 47 -- Indoor/Outdoor Air Quality (CO2)Sensor

(33ZCSENCO2) -- Typical Wiring Diagram

To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return--air grille (if present) so it senses the concentration of CO leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

COM

24 VAC

Fig. 48 -- RTU--MP / Indoor CO2Sensor

(33ZCSENCO2) Connections

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus weatherproof enclosure) — The outdoor air CO designed to monitor carbon dioxide (CO outside ventilation air and interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 49. The outdoor air CO sensor must be located in the economizer outside air hood.

J4-3

C08462

sensor is

) levels in the

551J

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 3 ft (0.9 m) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor — For each sensor, use two 2--conductor 18 AWG (American

Wire Gage) twisted--pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals.

To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 47. Connect the 4--20 mA terminal to RTU--MP J4--2 and connect the SIG COM terminal to RTU--MP J4--3. See Fig. 48.

COVER REMOVED SIDE VIEW

C07135

Fig. 49 -- Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO

Sensor — A dedicated power

supply is required for this sensor. A two--wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the OAQ sensor. See Fig. 47. Connect the 4 to 20 mA terminal to RTU--MP J4--5. Connect the SIG COM terminal to RTU--MP J4--6. See Fig. 50.

OAQ Sensor/RH Sensor

SEN

COM

J4-5

J4-6

24 VAC

C08463

Fig. 50 -- RTU--MP / Outdoor CO2Sensor

(33ZCSENCO2) Connections

On 551J units equipped with factory--installed Smoke

Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The RTU--MP controller communicates the smoke detector’s tripped status to the BAS building control. See Fig. 38, the RTU--MP System Control wiring schematic.

→

Also set MENU on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 36 and Table 3 for wire terminations at J5.

Schedules→occupancy source to DI

Power Exhaust (output)

Connect the accessory Power Exhaust contactor coil(s) per Fig. 51.

The Fire Shutdown Switch configuration,

→

normally open status of this input when there is no fire alarm.

Config→Inputs→input 5, identifies the

Connecting Discrete Inputs

Status

Filter

The filter status accessory is a field--installed accessory. This accessory detects plugged filters. When installing

551J

this accessory, the unit must be configured for filter status

→

by setting MENU to Filter Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 36 and Fig. 38 for wire terminations at J5.

Config→Inputs→input3,5,8,or9

Fan Status

The fan status accessory is a field--installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be configured for fan status by setting

→

Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 36 and Fig. 38 for wire terminations at J5.

Config→Inputs→input3,5,8,or9to Fan

Remote Occupancy

The remote occupancy accessory is a field--installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode. When installing this accessory, the unit must be configured for remote

→

occupancy by setting MENU 5, 8, or 9 to Remote Occupancy and normally open (N/O)

or normally closed (N/C).

Config→Inputs→input 3,

Power Exhaust

PEC

TAN

J11-3

CTB

THERMOSTAT

GRA

Fig. 51 -- RTU--MP Power Exhaust Connections

Communication Wiring -- Protocols

General

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU--MP can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 52 for the switch setting per protocol. The 3rd party connection to the RTU--MP is through plug J19.

NOTE: Power must be cycled after changing the SW1--3 switch settings.

Refer to the RTU--MP 3rd Party Integration Guide for more detailed information on protocols, 3rd party wiring, and networking.

C08464

SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1

BACnet MS/TP (Master)

Modbus (Slave)

N2 (Slave)

LonWorks Unused ON ON OFF ON OFF OFF OFF

NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown

BAUD RATE DS2 DS1

9600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ON

Unused OFF OFF OFF ON OFF Select Baud Select Baud

Unused OFF OFF ON ON OFF Select Baud Select Baud

Unused OFF OFF OFF ON ON OFF OFF

Baud Rate Selections

Fig. 52 -- RTU--MP SW3 Dip Switch Settings

C07166

551J

Local Access

BACview6Handheld

The BACview6is a keypad/display interface used to connect to the RTU--MP to access the control information, read sensor values, and test the RTU, see Fig. 53. This is an accessory interface that does not come with the MP controller and can only be used at the unit. Connect the BACview are 2 password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is idle. Contact your Bryant applications engineer for details on navigation and screen content.

to the RTU--MP’s J12 local access port. There

Virtual BACview

Virtual BACview is a freeware computer program that

functions as the BACview

Handheld. The USB Link interface (USB--L) is required to connect a computer to the RTU--MP board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld.

RTU--MP Troubleshooting

Communication

The LEDs indicate if the controller is speaking to the devices on the network. The LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs will appear.

LEDs

C07170

Fig. 53 -- BACview6Handheld Connections

Table 4 – LEDs

The LEDs on the RTU--MP show the status of certain functions

If this LED is on... Status is...

Power The RTU MP has power

Rx The RTU MP is receiving data from the network segment

Tx The RTU MP is transmitting data over the network segment DO# The digital output is active

The Run and Error LEDs indicate control module and network status

If Run LED shows...

2 flashes per second Off Normal

2 flashes per second

551J

2 flashes per second On

5 flashes per second On Exec start---up aborted, Boot is running

5 flashes per second Off Firmware transfer in progress, Boot is running

7 flashes per second

14 flashes per second

On On

And Error LED shows... Status is...

2flashes, alternating with Run LED

3flashes, then off

4flashes, then pause

7 flashes per second, alternating with Run LED

14 flashes per second, alternating with Run LED

Five minute auto--- restart delay after system error

Control module has just been formatted

Two or more devices on this network have the same ARC156 network address

Exec halted after frequent system errors or control programs halted

Ten second recovery period after brownout

Brownout

Failure. Try the following solutions:

S Turn the RTU --- MP off, then on. S F o r m a t t h e R T U --- M P. S Download memory to the RTU --- MP. S Replace the RTU---MP.

NOTE: Contact your Bryant applications engineer for details on configuration of RTU--MP, operating sequences and troubleshooting information, as well as details on configuration and troubleshooting of connected networks.

Table5UnitWire/FuseorHACRBreakerSizingData

ELEC. HTR P. E . NO C.O. or UNPWR C.O.

NO P.E. w/P.E. (pwrd fr/unit)

UNIT

551J*04

CRHEATER***

IFM TYPE

N O M . V --- P h --- H Z

NONE --- --101A00 3.3/4.4 15.9/18.3 29.2/32.1 45/45 29/30 88/88 31.5/34.5 45/45 31/32 90/90 102A00 4.9/6.5 23.5/27.1 38.6/43.1 45/45 36/40 88/88 41.0/45.5 45/45 38/42 90/90 103B00 6.5/8.7 31.4/36.3 48.5/54.6 50/60 45/50 88/88 50.9/57.0 60/60 47/52 90/90

D D --- S T D

208/230--- 1 ---60

208/230--- 3 ---60

4 6 0 --- 3 --- 6 0

104B00 7.9/10.5 37.9/43.8 56.6/64.0 60/70 52/59 88/88 59.0/66.4 60/70 54/61 90/90

102A00,102A00 9.8/13.0 46.9/54.2 67.9/77.0 70/80 62/71 88/88 70.3/79.4 80/80 65/73 90/90

NONE --- --101A00 3.3/4.4 9.2/10.6 21.4/22.5 30/30 22/22 82/82 23.3/24.9 30/30 24/24 84/84 102A00 4.9/6.5 13.6/15.6 26.3/28.8 30/30 24/26 82/82 28.6/31.1 30/35 26/29 84/84 103B00 6.5/8.7 18.1/20.9 31.9/35.4 35/40 29/33 82/82 34.3/37.8 35/40 32/35 84/84

D D --- S T D

104B00 7.9/10.5 21.9/25.3 36.6/40.9 40/45 34/38 82/82 39.0/43.3 40/45 36/40 84/84 105A00 12.0/16.0 33.4/38.5 51.0/57.4 60/60 47/53 82/82 53.4/59.8 60/60 49/55 84/84

NONE --- --101A00 3.3/4.4 9.2/10.6 18.9/19.4 25/25 19/19 87/87 20.8/21.8 30/30 21/21 89/89 102A00 4.9/6.5 13.6/15.6 23.1/25.6 25/30 21/24 87/87 25.5/28.0 30/30 23/26 89/89 103B00 6.5/8.7 18.1/20.9 28.8/32.3 30/35 26/30 87/87 31.1/34.6 35/35 29/32 89/89

MED

104B00 7.9/10.5 21.9/25.3 33.5/37.8 35/40 31/35 87/87 35.9/40.1 40/45 33/37 89/89 105A00 12.0/16.0 33.4/38.5 47.9/54.3 50/60 44/50 87/87 50.3/56.6 60/60 46/52 89/89

NONE --- --101A00 3.3/4.4 9.2/10.6 19.2/19.8 25/25 19/19 105/105 21.1/22.1 30/30 21/21 107/107 102A00 4.9/6.5 13.6/15.6 23.5/26.0 25/30 22/24 105/105 25.9/28.4 30/30 24/26 107/107 103B00 6.5/8.7 18.1/20.9 29.1/32.6 30/35 27/30 105/105 31.5/35.0 35/40 29/32 107/107

HIGH

104B00 7.9/10.5 21.9/25.3 33.9/38.1 35/40 31/35 105/105 36.3/40.5 40/45 33/37 107/107 105A00 12.0/16.0 33.4/38.5 48.3/54.6 50/60 44/50 105/105 50.6/57.0 60/60 47/52 107/107

NONE --- --106A00 6.0 7.2 14.0 15 13 43 15.3 20 14 44 107A00 8.8 10.6 18.3 20 17 43 19.5 20 18 44 108A00 11.5 13.8 22.3 25 20 43 23.5 25 22 44

D D --- S T D

109A00 14.0 16.8 26.0 30 24 43 27.3 30 25 44

NONE --- --106A00 6.0 7.2 11.6 15 11 45 12.9 15 12 46 107A00 8.8 10.6 15.9 20 15 45 17.1 20 16 46

MED

108A00 11.5 13.8 19.9 20 18 45 21.1 25 19 46 109A00 14.0 16.8 23.6 25 22 45 24.9 25 23 46

NONE --- --106A00 6.0 7.2 12.3 15 11 54 13.5 15 12 55 107A00 8.8 10.6 16.5 20 15 54 17.8 20 16 55

HIGH

108A00 11.5 13.8 20.5 25 19 54 21.8 25 20 55 109A00 14.0 16.8 24.3 25 22 54 25.5 30 23 55

NOM

(KW)

FLA FLA

MCA

29.2 45 29 88 31.1 45 31 90

1.9

21.4 30 22 82 23.2 30 24 84

1.9

18.9 25 19 87 20.8 30 21 89

1.9

19.2 25 19 105 21.1 30 21 107

1.9

11.8 15 12 43 12.8 15 13 44

1.0

9.9 15 10 45 10.9 15 11 46

1.0

10.4 15 10 54 11.4 15 11 55

1.0

FUSE

or HACR BRKR

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE

or HACR BRKR

DISC. SIZE

551J

NONE --- --- 1.9 9.3 15 10 42 11.2 15 12 44

D D --- S T D

NONE --- --- 1.9 7.2 15 7 43 9.1 15 9 45

MED

5 7 5 --- 3 --- 6 0

NONE --- --- 1.9 7.3 15 7 49 9.2 15 9 51

HIGH

See “Legend and Notes for Table 5” on page 35.

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

ELEC. HTR P. E . w/ PWRD C.O.

NO P.E. w/P.E. (pwrd fr/unit)

UNIT

551J*04

CRHEATER***

IFM TYPE

N O M . V --- P h --- H Z

NONE --- --101A00 3.3/4.4 15.9/18.3 35.1/38.1 50/50 34/35 93/93 37.5/40.5 50/50 36/37 95/95 102A00 4.9/6.5 23.5/27.1 44.6/49.1 50/50 41/45 93/93 47.0/51.5 50/60 43/47 95/95 103B00 6.5/8.7 31.4/36.3 54.5/60.6 60/70 50/56 93/93 56.9/63.0 60/70 52/58 95/95

D D --- S T D

208/230--- 1 ---60

208/230--- 3 ---60

4 6 0 --- 3 --- 6 0

104B00 7.9/10.5 37.9/43.8 62.6/70.0 70/80 58/64 93/93 65.0/72.4 70/80 60/67 95/95

102A00,102A00 9.8/13.0 46.9/54.2 73.9/83.0 80/90 68/76 93/93 76.3/85.4 80/90 70/79 95/95

NONE --- --101A00 3.3/4.4 9.2/10.6 26.8/28.5 30/30 27/27 87/87 29.1/30.9 35/35 29/29 89/89 102A00 4.9/6.5 13.6/15.6 32.3/34.8 35/35 30/32 87/87 34.6/37.1 35/40 32/34 89/89 103B00 6.5/8.7 18.1/20.9 37.9/41.4 40/45 35/38 87/87 40.3/43.8 45/45 37/40 89/89

D D --- S T D

104B00 7.9/10.5 21.9/25.3 42.6/46.9 45/50 39/43 87/87 45.0/49.3 50/50 41/45 89/89 105A00 12.0/16.0 33.4/38.5 57.0/63.4 60/70 52/58 87/87 59.4/65.8 60/70 50/60 89/89

NONE --- --101A00 3.3/4.4 9.2/10.6 23.7/25.4 30/30 24/24 92/92 26.0/27.8 30/30 26/26 94/94 102A00 4.9/6.5 13.6/15.6 29.1/31.6 30/35 27/29 92/92 31.5/34.0 35/35 29/31 94/94 103B00 6.5/8.7 18.1/20.9 34.8/38.3 35/40 32/35 92/92 37.1/40.6 40/45 34/37 94/94

MED

104B00 7.9/10.5 21.9/25.3 39.5/43.8 40/45 36/40 92/92 41.9/46.1 45/50 39/42 94/94 105A00 12.0/16.0 33.4/38.5 53.9/60.3 60/70 50/55 92/92 56.3/62.6 60/70 52/58 94/94

NONE --- --101A00 3.3/4.4 9.2/10.6 24.0/25.8 30/30 25/25 110/110 26.4/28.1 30/30 27/27 112/112 102A00 4.9/6.5 13.6/15.6 29.5/32.0 30/35 27/29 110/110 31.9/34.4 35/35 29/32 112/112 103B00 6.5/8.7 18.1/20.9 35.1/38.6 40/40 32/36 110/110 37.5/41.0 40/45 35/38 112/112

HIGH

104B00 7.9/10.5 21.9/25.3 39.9/44.1 40/45 37/41 110/110 42.3/46.5 45/50 39/43 112/112 105A00 12.0/16.0 33.4/38.5 54.3/60.6 60/70 50/56 110/110 56.6/63.0 60/70 52/58 112/112

NONE --- --106A00 6.0 7.2 16.8 20 15 45 18.0 20 17 46 107A00 8.8 10.6 21.0 25 19 45 22.3 25 20 46 108A00 11.5 13.8 25.0 25 23 45 26.3 30 24 46

D D --- S T D

109A00 14.0 16.8 28.8 30 26 45 30.0 30 28 46

NONE --- --106A00 6.0 7.2 14.4 15 13 47 15.6 20 14 48 107A00 8.8 10.6 18.6 20 17 47 19.9 20 18 48

MED

108A00 11.5 13.8 22.6 25 21 47 23.9 25 22 48 109A00 14.0 16.8 26.4 30 24 47 27.6 30 25 48

NONE --- --106A00 6.0 7.2 15.0 15 14 56 16.3 20 15 57 107A00 8.8 10.6 19.3 20 18 56 20.5 25 19 57

HIGH

108A00 11.5 13.8 23.3 25 21 56 24.5 25 23 57 109A00 14.0 16.8 27.0 30 25 56 28.3 30 26 57

NOM

(KW)

FLA FLA

MCA

34.0 50 34 93 35.9 50 36 95

1.9

26.2 30 27 87 28.1 35 29 89

1.9

23.7 30 24 92 25.6 30 26 94

1.9

24.0 30 25 110 25.9 30 27 112

1.9

14.0 20 14 45 15.0 20 16 46

1.0

12.1 15 12 47 13.1 15 13 48

1.0

12.6 15 13 56 13.6 20 14 57

1.0

FUSE

or HACR BRKR

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE

or HACR BRKR

DISC. SIZE

NONE --- --- 1.9 11.0 15 12 44 12.9 15 14 46

D D --- S T D

NONE --- --- 1.9 8.9 15 9 45 10.8 15 11 47

MED

5 7 5 --- 3 --- 6 0

NONE --- --- 1.9 9.0 15 9 51 10.9 15 11 53

HIGH

See “Legend and Notes for Table 5” on page 35.

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

ELEC. HTR P. E . NO C.O. or UNPWR C.O.

NO P.E. w/P.E. (pwrd fr/unit)

UNIT

208/230--- 3 ---60

551J*05

4 6 0 --- 3 --- 6 0

CRHEATER***

IFM TYPE

N O M . V --- P h --- H Z

NONE --- --101A00 3.3/4.4 15.9/18.3 36.1/36.1 50/50 35/35 127/127 38.0/38.0 50/50 37/37 129/129 103B00 6.5/8.7 31.4/36.3 48.5/54.6 50/60 45/50 127/127 50.9/57.0 60/60 47/52 129/129

102A00,102A00 9.8/13.0 46.9/54.2 67.9/77.0 70/80 62/71 127/127 70.3/79.4 80/80 65/73 129/129

D D --- S T D

103B00,103B00 13.1/17.4 62.8/72.5 87.8/99.9 90/100 81/92 127/127 90.1/102.3 100/110 83/94 129/129

208/230--- 1 ---60

104B00,104B00 15.8/21.0 75.8/87.5 104.0/118.6 110/125 96/109 127/127 106.4/121.0 110/125 98/111 129/129

NONE --- --102A00 4.9/6.5 13.6/15.6 26.3/28.8 30/30 26/26 93/93 28.6/31.1 40/40 28/29 95/95 103B00 6.5/8.7 18.1/20.9 31.9/35.4 35/40 29/33 93/93 34.3/37.8 40/40 32/35 95/95 105A00 12.0/16.0 33.4/38.5 51.0/57.4 60/60 47/53 93/93 53.4/59.8 60/60 49/55 95/95

D D --- S T D

104B00,104B00 15.8/21.0 43.8/50.5 64.0/72.4 70/80 59/67 93/93 66.4/74.8 70/80 61/69 95/95

NONE --- --102A00 4.9/6.5 13.6/15.6 23.4/25.6 30/30 23/24 98/98 25.5/28.0 30/30 25/26 100/100 103B00 6.5/8.7 18.1/20.9 28.8/32.3 30/35 26/30 98/98 31.1/34.6 35/35 29/32 100/100

MED

105A00 12.0/16.0 33.4/38.5 47.9/54.3 50/60 44/50 98/98 50.3/56.6 60/60 46/52 100/100

104B00,104B00 15.8/21.0 43.8/50.5 60.9/69.3 70/70 56/64 98/98 63.3/71.6 70/80 58/66 100/100

NONE --- --102A00 4.9/6.5 13.6/15.6 23.7/26.0 30/30 23/24 116/116 25.9/28.4 30/30 26/26 118/118 103B00 6.5/8.7 18.1/20.9 29.1/32.6 30/35 27/30 116/116 31.5/35.0 35/40 29/32 118/118

HIGH

105A00 12.0/16.0 33.4/38.5 48.3/54.6 50/60 44/50 1116/16 50.6/57.0 60/60 47/52 118/118

104B00,104B00 15.8/21.0 43.8/50.5 61.3/69.6 70/70 56/64 116/116 63.6/72.0 70/80 59/66 118/118

NONE --- --106A00 6.0 7.2 14.0 15 13 47 15.3 20 14 48 108A00 11.5 13.8 22.3 25 20 47 23.5 25 22 48 109A00 14.0 16.8 26.0 30 24 47 27.3 30 25 48

D D --- S T D

108A00,108A00 23.0 27.7 39.6 40 36 47 40.9 45 38 48

NONE --- --106A00 6.0 7.2 11.6 15 11 49 12.9 15 12 50 108A00 11.5 13.8 19.9 20 18 49 21.1 25 19 50

MED

109A00 14.0 16.8 23.6 25 22 49 24.9 25 23 50

108A00,108A00 23.0 27.7 37.3 40 34 49 38.5 40 35 50

NONE --- --016A00 6.0 7.2 12.3 15 11 58 13.5 15 12 59 108A00 11.5 13.8 20.5 25 19 58 21.8 25 20 59

HIGH

109A00 14.0 16.8 24.3 25 22 58 25.5 30 23 59

108A00,108A00 23.0 27.7 37.9 40 35 58 39.1 40 36 59

NOM (KW)

FLA FLA

MCA

36.1 50 35 127 38.0 50 37 129

1.9

25.9 30 26 93 27.8 40 28 95

1.9

23.4 30 23 98 25.3 30 25 100

1.9

23.7 30 23 116 25.6 30 26 118

1.9

12.7 15 13 47 13.7 20 14 48

1.0

10.8 15 11 49 11.8 15 12 50

1.0

11.3 15 11 58 12.3 15 12 59

1.0

FUSE

HACR

BRKR

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE

or HACR BRKR

DISC. SIZE

551J

NONE --- --- 1.9 10.9 15 11 43 12.8 15 13 45

D D --- S T D

NONE --- --- 1.9 8.8 15 9 44 10.7 15 11 46

MED

5 7 5 --- 3 --- 6 0

NONE --- --- 1.9 8.9 15 9 50 10.8 15 11 52

HIGH

See “Legend and Notes for Table 5” on page 35.

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

ELEC. HTR P. E . w/PWRD C.O.

NO P.E. w/P.E. (pwrd fr/unit)

UNIT

208/230--- 3 ---60

551J*05

4 6 0 --- 3 --- 6 0

CRHEATER***

IFM TYPE

N O M . V --- P h --- H Z

NONE --- --101A00 3.3/4.4 15.9/18.3 40.9/40.9 60/60 41/41 132/132 42.8/42.8 60/60 43/43 134/134 103B00 6.5/8.7 31.4/36.3 54.5/60.6 60/70 50/56 132/132 56.9/63.0 60/70 52/58 134/134

102A00,102A00 9.8/13.0 46.9/54.2 73.9/83.0 80/90 68/76 132/132 76.3/85.4 80/90 70/79 134/134

D D --- S T D

103B00,103B00 13.1/17.4 62.8/72.5 93.8/105.9 100/110 86/97 132/132 96.1/108.3 100/110 88/100 134/134

208/230--- 1 ---60

104B00,104B00 15.8/21.0 75.8/87.5 110.0/124.6 125/125 101/115 132/132 112.4/127.0 125/150 103/117 134/134

NONE --- --102A00 4.9/6.5 13.6/15.6 32.3/34.8 40/40 31/32 98/98 34.6/37.1 45/45 34/34 100/100 103B00 6.5/8.7 18.1/20.9 37.9/41.4 40/45 35/38 98/98 40.3/43.8 45/45 37/40 100/100 105A00 12.0/16.0 33.4/38.5 57.0/63.4 60/70 52/58 98/98 59.4/65.8 60/70 55/60 100/100

D D --- S T D

104B00,104B00 15.8/21.0 43.8/50.5 70.0/78.4 80/80 64/72 98/98 72.4/80.8 80/90 67/74 100/100

NONE --- --102A00 4.9/6.5 13.6/15.6 29.1/31.6 40/40 29/29 103/103 31.5/34.0 40/40 31/31 105/105 103B00 6.5/8.7 18.1/20.9 34.8/38.3 40/40 32/35 103/103 37.1/40.6 40/45 34/37 105/105

MED

105A00 12.0/16.0 33.4/38.5 53.9/60.3 60/70 50/55 103/103 56.3/62.6 60/70 52/58 105/105

104B00,104B00 15.8/21.0 43.8/50.5 66.9/75.3 70/80 62/69 103/103 69.3/77.6 70/80 64/71 105/105

NONE --- --102A00 4.9/6.5 13.6/15.6 29.5/32.0 40/40 29/29 121/121 31.9/34.4 40/40 31/32 123/123 103B00 6.5/8.7 18.1/20.9 35.1/38.6 40/40 32/36 121/121 37.5/41.0 40/45 35/38 123/123

HIGH

105A00 12.0/16.0 33.4/38.5 54.3/60.6 60/70 50/56 121/121 56.6/63.0 60/70 52/58 123/123

104B00,104B00 15.8/21.0 43.8/50.5 67.3/75.6 70/80 62/70 121/121 69.6/78.0 70/80 64/72 123/123

NONE --- --106A00 6.0 7.2 16.8 20 15 49 18.0 20 17 50 108A00 11.5 13.8 25.0 25 23 49 26.3 30 24 50 109A00 14.0 16.8 28.8 30 26 49 30.0 30 28 50

D D --- S T D

108A00,108A00 23.0 27.7 42.4 45 39 49 43.6 45 40 50

NONE --- --106A00 6.0 7.2 14.4 15 13 51 15.6 20 14 52 108A00 11.5 13.8 22.6 25 21 51 23.9 25 22 52

MED

109A00 14.0 16.8 26.4 30 24 51 27.6 30 25 52

108A00,108A00 23.0 27.7 40.0 45 37 51 41.3 45 38 52

NONE --- --016A00 6.0 7.2 15.0 20 14 60 16.3 20 15 61 108A00 11.5 13.8 23.3 25 21 60 24.5 25 23 61

HIGH

109A00 14.0 16.8 27.0 30 25 60 28.3 30 26 61

108A00,108A00 23.0 27.7 40.6 45 37 60 41.9 45 39 61

NOM (KW)

FLA FLA

MCA

40.9 60 41 132 42.8 60 43 134

1.9

30.7 40 31 98 32.6 45 34 100

1.9

28.2 40 29 103 30.1 40 31 105

1.9

28.5 40 29 121 30.4 40 31 123

1.9

14.9 20 15 49 15.9 20 16 50

1.0

13.0 15 13 51 14.0 20 14 52

1.0

13.5 20 14 60 14.5 20 15 61

1.0

FUSE

or HACR BRKR

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE

or HACR BRKR

DISC. SIZE

NONE --- --- 1.9 12.6 15 13 45 14.5 20 15 47

D D --- S T D

NONE --- --- 1.9 10.5 15 11 46 12.4 15 13 48

MED

5 7 5 --- 3 --- 6 0

NONE --- --- 1.9 10.6 15 11 52 12.5 15 13 54

HIGH

See “Legend and Notes for Table 5” on page 35.

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

ELEC. HTR P. E . NO C.O. or UNPWR C.O.

NO P.E. w/P.E. (pwrd fr/unit)

UNIT

208/230--- 3 ---60

551J*06

4 6 0 --- 3 --- 6 0

CRHEATER***

IFM TYPE

N O M . V --- P h --- H Z

NONE --- --102A00 4.9/6.5 23.5/27.1 40.1/43.1 60/60 39/40 144/144 42.0/45.5 60/60 41/42 146/146 103B00 6.5/8.7 31.4/36.3 48.5/54.6 60/60 45/50 144/144 50.9/57.0 60/60 47/52 146/146

102A00,102A00 9.8/13.0 46.9/54.2 67.9/77.0 70/80 62/71 144/144 70.3/79.4 80/80 65/73 146/146

D D --- S T D

103B00,103B00 13.1/17.4 62.8/72.5 87.8/99.9 90/100 81/92 144/144 90.1/102.3 100/110 83/94 146/146

208/230--- 1 ---60

104B00,104B00 15.8/21.0 75.8/87.5 104.0/118.6 110/125 96/109 144/144 106.4/121.0 110/125 98/111 146/146

NONE --- --102A00 4.9/6.5 13.6/15.6 28.7/28.8 40/40 28/28 120/120 30.6/31.1 45/45 31/31 122/122 104B00 7.9/10.5 21.9/25.3 36.6/40.9 40/45 34/38 120/120 39.0/43.3 45/45 36/40 1/22122 105A00 12.0/16.0 33.4/38.5 51.0/57.4 60/60 47/53 120/120 53.4/59.8 60/60 49/55 122/122

D D --- S T D

104B00,104B00 15.8/21.0 43.8/50.5 64.0/72.4 70/80 59/67 120/120 66.4/74.8 70/80 61/69 122/122 104B00,105A00 19.9/26.5 55.2/63.8 78.3/89.0 80/90 72/82 120/120 80.6/91.4 90/100 74/84 122/122

NONE --- --102A00 4.9/6.5 13.6/15.6 26.5/26.5 40/40 26/26 143/143 28.4/28.4 40/40 28/28 145/145 104B00 7.9/10.5 21.9/25.3 33.9/38.1 40/40 31/35 143/143 36.3/40.5 40/45 33/37 145/145 105A00 12.0/16.0 33.4/38.5 48.3/54.6 50/60 44/50 143/143 50.6/57.0 60/60 47/52 145/145

MED

104B00,104B00 15.8/21.0 43.8/50.5 61.3/69.6 70/70 56/64 143/143 63.6/72.0 70/80 59/66 145/145 104B00,105A00 19.9/26.5 55.2/63.8 75.5/86.3 80/90 69/79 143/143 77.9/88.6 80/90 72/82 145/145

NONE --- --102A00 4.9/6.5 13.6/15.6 28.8/28.9 40/40 29/29 169/169 30.7/31.3 45/45 31/31 171/171 104B00 7.9/10.5 21.9/25.3 36.8/41.0 40/45 34/38 169/169 39.1/43.4 45/45 36/40 171/171 105A00 12.0/16.0 33.4/38.5 51.1/57.5 60/60 47/53 169/169 53.5/59.9 60/60 49/55 171/171

HIGH

104B00,104B00 15.8/21.0 43.8/50.5 64.1/72.5 70/80 59/67 169/169 66.5/74.9 70/80 61/69 171/171 104B00,104A00 19.9/26.5 55.2/63.8 78.4/89.1 80/90 72/82 169/169 80.8/91.5 90/100 74/84 171/171

NONE --- --106A00 6.0 7.2 14.0 20 14 58 15.3 20 15 59 108A00 11.5 13.8 22.3 25 20 58 23.5 25 22 59 109A00 14.0 16.8 26.0 30 24 58 27.3 30 25 59

D D --- S T D

108A00,108A00 23.0 27.7 39.6 40 36 58 40.9 45 38 59 108A00,109A00 25.5 30.7 43.4 45 40 58 44.6 45 41 59

NONE --- --106A00 6.0 7.2 12.3 15 12 69 13.5 20 13 70 108A00 11.5 13.8 20.5 25 19 69 21.8 25 20 70 109A00 14.0 16.8 24.3 25 22 69 25.5 30 23 70

MED

108A00,108A00 23.0 27.7 37.9 40 35 69 39.1 40 36 70 108A00,109A00 25.5 30.7 41.6 45 38 69 42.9 45 39 70

NONE --- --016A00 6.0 7.2 13.3 20 13 82 14.5 20 14 83 108A00 11.5 13.8 21.5 25 20 82 22.8 25 21 83 109A00 14.0 16.8 25.3 30 23 82 26.5 30 24 83

HIGH

108A00,108A00 23.0 27.7 38.9 40 36 82 40.1 45 37 83 108A00,109A00 25.5 30.7 42.6 45 39 82 43.9 45 40 83

NOM (KW)

FLA FLA

MCA

40.1 60 39 144 42.0 60 41 146

1.9

28.7 40 28 120 30.6 45 31 122

1.9

26.5 40 26 143 28.4 40 28 145

1.9

28.8 40 29 169 30.7 45 31 171

1.9

13.7 20 14 58 14.7 20 15 59

1.0

12.3 15 12 69 13.3 20 13 70

1.0

13.1 20 13 82 14.1 20 14 83

1.0

FUSE

HACR

BRKR

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE

or HACR BRKR

DISC. SIZE

551J

NONE --- --- 1.9 11.3 15 12 46 13.2 15 14 48

D D --- S T D

NONE --- --- 1.9 9.3 15 9 53 11.2 15 11 55

MED

5 7 5 --- 3 --- 6 0

NONE --- --- 1.9 10.1 15 10 64 12.0 15 12 66

HIGH

See “Legend and Notes for Table 5” on page 35.

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

ELEC. HTR P. E . w/ PWRD C.O.

NO P.E. w/P.E. (pwrd fr/unit)

UNIT

208/230--- 3 ---60

551J*06

4 6 0 --- 3 --- 6 0

CRHEATER***

IFM TYPE

N O M . V --- P h --- H Z

NONE --- --102A00 4.9/6.5 23.5/27.1 44.9/49.1 60/60 44/45 149/149 47.0/51.5 60/60 47/47 151/151 103B00 6.5/8.7 31.4/36.3 54.5/60.6 60/70 50/56 149/149 56.9/63.0 60/70 52/58 151/151

102A00,102A00 9.8/13.0 46.9/54.2 73.9/83.0 80/90 68/76 149/149 76.3/85.4 80/90 70/79 151/151

D D --- S T D

103B00,103B00 13.1/17.4 62.8/72.5 93.8/105.9 100/110 86/97 149/149 96.1/108.3 100/110 88/100 151/151

208/230--- 1 ---60

104B00,104B00 15.8/21.0 75.8/87.5 110.0/124.6 125/125 101/115 149/149 112.4/127.0 125/150 103/117 151/151

NONE --- --102A00 4.9/6.5 13.6/15.6 33.5/34.8 45/45 34/34 125/125 35.4/37.1 50/50 36/36 127/127 104B00 7.9/10.5 21.9/25.3 42.6/46.9 45/50 39/43 125/125 45.0/49.3 50/50 41/45 127/127 105A00 12.0/16.0 33.4/38.5 57.0/63.4 60/70 52/58 125/125 59.4/65.8 60/70 55/60 127/127

D D --- S T D

104B00,104B00 15.8/21.0 43.8/50.5 70.0/78.4 80/80 64/72 125/125 72.4/80.8 80/90 67/74 127/127 104B00,105A00 19.9/26.5 55.2/63.8 84.3/95.0 90/100 78/87 125/125 86.6/97.4 90/100 80/90 127/127

NONE --- --102A00 4.9/6.5 13.6/15.6 31.3/32.0 45/45 31/31 148/148 33.2/34.4 45/45 34/34 150/150 104B00 7.9/10.5 21.9/25.3 39.9/44.1 45/45 37/41 148/148 42.3/46.5 45/50 39/43 150/150 105A00 12.0/16.0 33.4/38.5 54.3/60.6 60/70 50/56 148/148 56.6/63.0 60/70 52/58 150/150

MED

104B00,104B00 15.8/21.0 43.8/50.5 67.3/75.6 70/80 62/70 148/148 69.6/78.0 70/80 64/72 150/150 104B00,105A00 19.9/26.5 55.2/63.8 81.5/92.3 90/100 75/85 148/148 83.9/94.6 90/100 77/87 150/150

NONE --- --102A00 4.9/6.5 13.6/15.6 33.6/34.9 45/45 34/34 174/174 35.5/37.3 50/50 36/36 176/176 104B00 7.9/10.5 21.9/25.3 42.8/47.0 45/50 39/43 174/174 45.1/49.4 50/50 42/45 176/176 105A00 12.0/16.0 33.4/38.5 57.1/63.5 60/70 53/58 174/174 59.5/65.9 60/70 55/61 176/176

HIGH

104B00,104B00 15.8/21.0 43.8/50.5 70.1/78.5 80/80 65/72 174/174 72.5/80.9 80/90 67/74 176/176 104B00,104A00 19.9/26.5 55.2/63.8 84.4/95.1 90/100 78/88 174/174 86.8/97.5 90/100 80/90 176/176

NONE --- --106A00 6.0 7.2 16.8 20 16 60 18.0 20 17 61 108A00 11.5 13.8 25.0 25 23 60 26.3 30 24 61 109A00 14.0 16.8 28.8 30 26 60 30.0 30 28 61

D D --- S T D

108A00,108A00 23.0 27.7 42.4 45 39 60 43.6 45 40 61 108A00,109A00 25.5 30.7 46.1 50 42 60 47.4 50 44 61

NONE --- --106A00 6.0 7.2 15.0 20 15 71 16.3 20 16 72 108A00 11.5 13.8 23.3 25 21 71 24.5 25 23 72 109A00 14.0 16.8 27.0 30 25 71 28.3 30 26 72

MED

108A00,108A00 23.0 27.7 40.6 45 37 71 41.9 45 39 72 108A00,109A00 25.5 30.7 44.4 45 41 71 45.6 50 42 72

NONE --- --016A00 6.0 7.2 16.0 20 16 84 17.3 20 17 85 108A00 11.5 13.8 24.3 25 22 84 25.5 30 23 85 109A00 14.0 16.8 28.0 30 26 84 29.3 30 27 85

HIGH

108A00,108A00 23.0 27.7 41.6 45 38 84 42.9 45 39 85 108A00,109A00 25.5 30.7 45.4 50 42 84 46.6 50 43 85

NOM (KW)

FLA FLA

MCA

44.9 60 44 149 46.8 60 47 151

1.9

33.5 45 34 125 35.4 50 36 127

1.9

31.3 45 31 148 33.2 45 34 150

1.9

33.6 45 34 174 35.5 50 36 176

1.9

15.9 20 16 60 16.9 20 17 61

1.0

14.5 20 15 71 15.5 20 16 72

1.0

15.3 20 16 84 16.3 20 17 85

1.0

FUSE

or HACR BRKR

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE

or HACR BRKR

DISC. SIZE

NONE --- --- 1.9 13.0 15 13 48 14.9 20 16 50

D D --- S T D

NONE --- --- 1.9 11.0 15 11 55 12.9 15 13 57

MED

5 7 5 --- 3 --- 6 0

NONE --- --- 1.9 11.8 15 12 66 13.7 15 14 68

HIGH

See “Legend and Notes for Table 5” on page 35.

Legend and Notes for Table 5

LEGEND:

BRKR --- Circuit breaker CO --- Convenient outlet DD --- Direct drive

DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps P E --- P o w e r e x h a u s t PWRD CO --- Powered convenient outlet UNPWR CO --- Unpowered convenient outlet NOTES:

1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and

440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.

% Voltage Imbalance = 100 x

indoor fan motor

max voltage deviation from average voltage

average voltage

Example: Supply voltage is 230-3-60

AB = 224 v BC = 231 v AC = 226 v

Average Voltage =

Determine maximum deviation from average voltage.

(AB) 227 – 224 = 3 v Maximum deviation is 4 v...........

(BC) 231 – 227 = 4 v Determine percent of voltage imbalance...........

% Voltage Imbalance = 100 x

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%. IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

(224 + 231 + 226)

= 227

= 1.76%

227

681

551J

C09302

Fig. 54 -- EconoMi$er IV Wiring

Step 11 — Adjust Factory--Installed Options

Smoke Detectors —

Smoke detector(s) will be connected at the Controls Connections Board, at terminals marked “Smoke Shutdown”. Cut jumper JMP 3 when ready to energize unit.

EconoMi$er IV Occupancy Switch —

Refer to Fig. 56 for general EconoMi$er IV wiring. External occupancy control is managed through a connection on the Controls Connections Board.

If external occupancy control is desired, connect a time clock or remotely controlled switch (closed for Occupied, open for Unoccupied sequence) at terminals marked OCCUPANCY. Cut jumper JMP 2 to complete the installation.

Step 12 — Install Accessories

Available accessories include:

Curb Thru--base connection kit (must be installed before unit

is set on curb) Electric heaters and single--poing connection kits Manual outside air damper Two--Position motorized outside air damper EconoMi$er IV (with control) EconoMi$er2 (without control/for external signal) Power Exhaust Differential dry--bulb sensor (EconoMi$er IV) Outdoor enthalpy sensor Differential enthalpy sensor CO

sensor

551J

Smoke detector (Return Air and/or Supply Air) Louvered hail guard Hood--type hail guard Phase monitor control

Refer to separate installation instructions for information on installing these accessories.

Pre--Start and Start--Up

—

This completes the mechanical installation of the unit. Refer to the unit’s Service Manual for detailed Pre--Start and Start--Up instructions.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: II551J---02

Replaces: New

Bryant 551J User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual