Bryant 551J Users Manual II551J 02

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2015-02-02

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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 . 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.

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

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal

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.

!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

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.

CAUTION

551J

Horizontal Connections / Economizer

Vertical Connections / Economizer

C10057

Fig. 1 -- Unit Dimensional Drawing

551J

C10058

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

551J

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 installa-

tion 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.

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)

18" (457)

42" (1067)

Required bottom condensate drain connection.

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

C07459

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.

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 —

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

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)

551J

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.

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.

551J

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.

7. Direction of airflow.

ROOF CURB

ACCESSORY A UNIT SIZE

CRRFCURB001A01 1’-2”

[356]

CRRFCURB002A01 2’-0”

[610]

551J*04-06

CONNECTOR

PKG. ACCY. BC

D ALT

DRAIN

HOLE

POWER CONTROL ACCESSORY

POWER

CRBTMPWR003A01 1’-9

”

[551]

”

[44.5]

1’-4”

[406]

CRBTMPWR004A01

” [19] NPT

” [31.7]

” [12.7]

NPT

” [12.7]

NPT

C10059

Fig. 3 -- Roof Curb Details

551J

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

C06110

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.

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.

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

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.

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.

CAUTION

C06005

UNIT MAX WEIGHT DIMENSIONS

A B C

LB KG IN MM IN MM IN MM

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.

Fig. 5 -- Rigging Details

551J

PositioningonCurb—

Position unit on roof curb so that the following clearances

are maintained: 1/4in. (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.

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.

CAUTION

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.

C06108

Fig. 6 -- Horizontal Conversion Panels

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

and mastic in accordance with applicable codes.

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.

FILTER ACCESS PANEL

OUTDOOR-AIR OPENING AND

INDOOR COIL ACCESS PANEL

COMPRESSOR

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 posi-

tion, 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.

HoodBox

HOOD BOX

BRACKET

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

assembly.

2. Fasten hood top and side plate assembly to unit with

screws provided. See Fig. 9.

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.

551J

SEAL STRIP

HOOD TOP

SEAL STRIP

HOOD

SIDE

SCREEN

RETAINER

HOOD SIDE

SCREEN

TRACKS

OUTDOOR AIR INLET SCREEN

SEAL STRIP

OUTDOOR-AIR HOOD – UNASSEMBLED

HOOD SIDES AND TOP ASSEMBLED

TRACKS FOR AIR

INLET SCREEN

HOOD

SIDE

HOOD TOP

C07504

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 bot-

tom 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 ba-

rometric 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.

SIDE

PANEL

INDOOR

COIL

ACCESS

PANEL

INDOOR

COIL

ACCESS

PANEL

CAULK

HERE

TOP

SIDE

PANEL

C06025

Fig. 10 -- Indoor Coil Access Panel Relocation

TOP

PANEL

INDOOR COIL

ACCESS PANEL

19 1/16”

SCREW

HOOD DIVIDER

LEFT

HOOD

SIDE

33 3/8”

(848mm)

(483mm)

C06026

Fig. 11 -- Economizer Hood Construction

DIVIDER

BAROMETRIC

RELIEF

CLEANABLE

ALUMINUM

FILTER FILTER

HOOD

FILTER

CLIP

OUTSIDE

AIR

C06027

Fig. 12 -- Economizer Filter Installation

551J

Step 9 — Install External Condensate Trap

and Line

The unit has one 3/4-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.

DRAIN

(FACTORY-INSTALLED)

PLUG

CONDENSATE PAN (SIDE VIEW)

STANDARD

SIDE DRAIN

ALTERNATE

BOTTOM DRAIN

C08021

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 1/2--in. square socket drive extension.

To use the alternate bottom drain connection, remove the

red drain plug from the bottom connection (use a 1/2-- i n .

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.

NOTE: Trap should be deep enough to offset maximum unit static

difference. A 4” (102) trap is recommended.

MINIMUM PITCH

1” (25mm) PER

10’ (3m) OF LINE BASE RAIL

OPEN

VENT

TO ROOF

DRAIN

DRAIN PLUG

ROOF

CURB

SEE NOTE

2˝ (51) MIN

C08022

Fig. 14 -- Condensate Drain Piping Details

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

(3/4-in.).

Step 10 — Make Electrical Connections

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.

!WARNING

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.

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

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.

551J

11 23

Disconnect

per

NEC

208/230-1-60

Disconnect

per

NEC

11 13 13 23

L1 L2 L3

C IFC Direct Drive IFM

208/230-3-60

460-3-60

575-3-60

Units Without Disconnect Option

Units With Disconnect Option

Optional

Disconnect

Switch

Disconnect factory test leads; discard.

Factory

Wiring

1-ph Belt Drive IFM

C10056

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 operation or performance satisfaction.

Do not connect aluminum wire between disconnect

switch and 551J unit. Use only copper wire.

(See Fig. 16.)

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

A93033

Fig. 16 -- Disconnect Switch and Unit

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.

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 1/4-in. female spade connector from the 230--v

connection and moving it to the 200-v 1/4-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 —

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.

!WARNING

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.

551J

Convenience

Outlet

GFCI

Pwd-CO

Fuse

Switch

Pwd-CO

Transformer

Control Box

Access Panel

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.

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 1/2-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.

RECEPTACLE

NOT INCLUDED

COVER – WHILE-IN-USE

WEATHERPROOF

BASE PLATE FOR

GFCI RECEPTACLE

C09022

Fig. 18 -- Weatherproof Cover Installation

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.

C08283

UNIT

VOLTAGE

CONNECT

PRIMARY

CONNECTIONS

TRANSFORMER

TERMINALS

208,

230 240 L1: RED +YEL

L2: BLU + GRA

H1 + H3

H2 + H4

460 480

L1: RED

Splice BLU + YEL

L2: GRA

H2 + H3

575 600 L1: RED

L2: GRA

Fig. 19 -- Powered Convenience Outlet Wiring

Fuse on power type: The factory fuse is a Bussman

“Fusetron” T--15, non--renewable screw--in (Edison base)

type plug fuse.

551J

NOTICE

Convenience Outlet Utilization

Maximum Intermittent use : 15 Amps 2 to 3 Hours

Maximum Continuous use : 8 Amps 24/7

50HJ542739 3.0

A9225

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:

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.

Factory--Option Thru--Base Connections —

This service connection kit consists of a 1/2--in electrical

bulkhead connector and a 3/4--in electrical bulkhead

connector, all factory--installed in the embossed (raised)

section of the unit basepan in the condenser section. The

3/4--in bulkhead connector enables the low--voltage control

wires to pass through the basepan. The 1/2--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

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 open-

ings. 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.

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.

551J

O/B/Y2 Y2

Y1 Y1

(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

Central

Terminal

Board

Typical

Thermostat

Connections

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

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 23 -- Field Control Wiring Raceway

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 —

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

PANEL

OUTDOOR

ACCESS PANEL

INDOOR

ACCESS

PANEL

C08133

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

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

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

EMT OR RIGID CONDUIT

(FIELD-SUPPLIED)

SINGLE

POINT BOX

CENTER

POST

HEATER

COVERS

HEATER

MOUNTING

BRACKET

HEATER

MODULE

(LOCATION 2)

HEATER

MODULE

(LOCATION 1)

SINGLE POINT

BOX

MOUNTING

SCREW

BRACKET AND

CONDUIT

DRIP BOOT

MAIN

CONTROL

BOX

CONTROL WIRE TERMINAL BLOCK

MANUAL RESET

LIMIT SWITCH

C08134

Fig. 25 -- Typical Component Location

TRACK

FLANGE

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.

ALLIED PA

MODEL NO.

ERIAL NO.

CORP

11 13

21 23

22.2

ISTED AIR

NDITIONING

UIP ACCESS

346N

P / N

2- 5610-4

REV

1113

2123

CONTROL

BOX

BUSHING

SINGLE

POINT BOX

MOUNTING

SCREWS

FOAM

BUSHING

DRIP BOOT

BRACKET

MOUNTING

SCREWS

HEATER

RELAYS

POWER

WIRES

HEATER

MOUNTING

SCREWS

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.

ORN

BRN

Field

Connections

HR1: On Heater 1 in Position #1

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

VIO

ORN VIO BRN

VIO BRN BRN

VIO

TB4

VIO HR2

HR1

BRN

VIO BRN

Elec Htr

CTB

CONTL

BOARD

C08331

Fig. 28 -- Accessory Electric Heater Control

Connections

551J

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.

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).

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

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 control panel, etc.

Duct smoke sensor

controller

Fastener

(2X)

Controller cover

Conduit nuts

(supplied by installer)

Conduit support plate

Cover gasket

(ordering option)

Conduit couplings

(supplied by installer)

Terminal block cover

Controller housing

and electronics

Alarm Power

Test/reset

switch

Trouble

C08208

Fig. 29 -- Controller Assembly

Duct smoke sensor

See

Detail A

Exhaust tube

Plug

Sampling tube

(ordered separately)

Intake

gasket Cover gasket

(ordering option)

TSD-CO2

(ordering option)

Sensor housing

and electronics

Exhaust gasket

Coupling

Sensor cover

Detail A

Magnetic

test/reset

switch

Alarm

Trouble

Power

Dirty

C08209

Fig. 30 -- Smoke Detector Sensor

551J

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.

Smoke Detector Sensor

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 Detector Sampling Tube

Controller module

Return Air Detector module

(shipping position shown)*

*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.)

Return Air

Sampling Tube

C08129

Fig. 33 -- Return Air Sampling Tube Location

551J

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.

Flexible

Exhaust Tubes

Screws

Sample Tube

C08126

Fig. 34 -- Return Air Detector Shipping Position

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

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.

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

551J

Table 3 – RTU--MP Controller Inputs and Outputs

POINT NAME BACnet OBJECT

NAME TYPE OF I/O CONNECTION PIN

NUMBERS

INPUTS

Space Temperature Sensor sptsens AI (10K Thermistor) J 2 0 --- 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

CONFIGURABLE INPUTS*

Space Relative Humidity sprh A I ( 4 --- 2 0 m a ) J 4 --- 2 , 3 o r J 4 --- 5 , 6

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

Supply Fan Status fanstat DI (24 VAC) J5---1,2 or J5--- 3,4 or

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

Filter Status filtstat DI (24 VAC)

Remote Occupancy Input remocc DI (24 VAC)

OUTPUTS

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) J 1 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 .

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.

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 1/2--in. hole in the flange or duct.

Use two field--supplied, self--drilling screws to secure the

sensor probe in a horizontal orientation. See Fig. 39.

SUPPLY AIR RETURN AIR

SUPPLY AIR

TEMPERATURE

SENSOR

ROOF

CURB

C08200

Fig. 39 -- Typical Mounting Location for Supply Air

Temperature (SAT) Sensor on Small Rooftop Units

551J

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 CO2sensor

Outdoor air CO2sensor

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:

S33ZCT55SPT, space temperature sensor with override

button

S33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment

S33ZCT59SPT, 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.

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.

2345 61

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-) 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.

2345 61

SW1

SEN SET

Cool Warm

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-) CCN COM

SENSOR WIRING

JUMPER

TERMINALS

AS SHOWN

BLK

(T56)

C08202

Fig. 42 -- T--56 Internal Connections

551J

SEN J20-1

J20-2

SEN

SET

Jumper

J20-3

SET

C08461

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.

OR SET SEN

OPB COM- PWR+

BLU (SPT)

BLK (STO)

24 VAC

SENSOR

WIRING

POWER

WIRING

BRN (COM)

NOTE: Must use a separate isolated transformer.

C07132

Fig. 44 -- Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

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.)

ESL

CTB

ECON

LOW

GND

24V

Enthalpy

Switch

GRA

BLK

RED

Factory Wiring Harness

ECONO

MOTOR

C09026

Fig. 45 -- Enthalpy Switch (33CSENTHSW) Connections

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).

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.

ESL

LOW

GND

24V

GRA

BLK

RED ECONO

MOTOR

– 4-20

Main

+ VDC

Out

– 4-20 Main

Out

+ 24-36

VDC In

C09027

Fig. 46 -- Outside and Return Air Enthalpy Sensor

Wiring

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 en-

thalpy sensor and the (--) terminal on the enthalpy

controller.

Indoor Air Quality (CO2sensor) — The indoor air quality

sensor accessory monitors space carbon dioxide (CO2)

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 CO2present in the space air.

The CO2sensors 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 CO2sensor for electrical

551J

requirements and terminal locations. See Fig. 47 for

typical CO2sensor wiring schematic.

87654321

24 VAC

24 VDC

NC ALARM

RELAY

CONTACTS

COM

}

0-10VDC

SIG COM

4-20mA

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 CO2

leaving the space. The sensor should be mounted in a

location to avoid direct breath contact.

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.

SEN

COM

J4-2

J4-3

IAQ Sensor

24 VAC

C08462

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

(33ZCSENCO2) Connections

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus

weatherproof enclosure) — The outdoor air CO2sensor is

designed to monitor carbon dioxide (CO2) levels in the

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 CO2

sensor must be located in the economizer outside air hood.

COVER REMOVED SIDE VIEW

C07135

Fig. 49 -- Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO2Sensor — 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.

SEN

COM

J4-5

J4-6

OAQ Sensor/RH Sensor

24 VAC

C08463

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

(33ZCSENCO2) Connections

551J

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.

The Fire Shutdown Switch configuration,

→

Config

→

Inputs

→

input 5, identifies the

normally open status of this input when there is no fire

alarm.

Connecting Discrete Inputs

Filter Status

The filter status accessory is a field--installed accessory.

This accessory detects plugged filters. When installing

this accessory, the unit must be configured for filter status

by setting MENU

→

Config

→

Inputs

→

input3,5,8,or9

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.

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

→

Config

→

Inputs

→

input3,5,8,or9to Fan

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.

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

→

Config

→

Inputs

→

input 3,

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

or normally closed (N/C).

Also set MENU

→

Schedules

→

occupancy source to DI

on/off. Input 8 or 9 is recommended for easy of

installation. Refer to Fig. 36 and Table 3 for wire

terminations at J5.

Power Exhaust (output)

Connect the accessory Power Exhaust contactor coil(s) per

Fig. 51.

Power Exhaust

J11-3

TAN

GRA

PEC

CTB

THERMOSTAT

C08464

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.

551J

SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1

BACnet MS/TP

(Master) Unused OFF OFF OFF ON OFF Select Baud Select Baud

Modbus

(Slave) Unused OFF OFF ON ON OFF Select Baud Select Baud

(Slave) Unused OFF OFF OFF ON ON OFF OFF

LonWorks Unused ON ON OFF ON OFF OFF OFF

NOTE:

DS = Dip Switch

BACnet MS/TP SW3 example shown

Baud Rate Selections

BAUD RATE DS2 DS1

9600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ON C07166

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

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

BACview6to the RTU--MP’s J12 local access port. There

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.

Virtual BACview

Virtual BACview is a freeware computer program that

functions as the BACview6Handheld. 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 LEDs

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.

C07170

Fig. 53 -- BACview6Handheld Connections

551J

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

2 flashes per second Off Normal

2 flashes per second 2flashes,

alternating with Run LED Five minute auto---restart delay after system error

2 flashes per second 3flashes,

then off Control module has just been formatted

2 flashes per second 4flashes,

then pause

Two or more devices on this network have the

same ARC156 network address

2 flashes per second On Exec halted after frequent system errors or

control programs halted

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 7 flashes per second, alternating with

Run LED Ten second recovery period after brownout

14 flashes per second 14 flashes per second,

alternating with Run LED Brownout

On On

Failure. Try the following solutions:

STurn the RTU---MP off, then on.

SF o r m a t t h e R T U --- M P.

SDownload memory to the RTU---MP.

SReplace 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.

551J

Table5UnitWire/FuseorHACRBreakerSizingData

UNIT

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

IFM TYPE

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

CRHEATER*** NOM

(KW) FLA FLA

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

MCA

FUSE

HACR

BRKR

DISC. SIZE

MCA

FUSE

HACR

BRKR

DISC. SIZE

FLA LRA FLA LRA

551J*04

208/230---1---60

D D --- S T D

NONE --- ---

1.9

29.2 45 29 88 31.1 45 31 90

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

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

208/230---3---60

D D --- S T D

NONE --- ---

1.9

21.4 30 22 82 23.2 30 24 84

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

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

MED

NONE --- ---

1.9

18.9 25 19 87 20.8 30 21 89

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

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

HIGH

NONE --- ---

1.9

19.2 25 19 105 21.1 30 21 107

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

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

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

D D --- S T D

NONE --- ---

1.0

11.8 15 12 43 12.8 15 13 44

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

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

MED

NONE --- ---

1.0

9.9 15 10 45 10.9 15 11 46

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

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

HIGH

NONE --- ---

1.0

10.4 15 10 54 11.4 15 11 55

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

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

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

D D --- S T D

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

MED

NONE --- --- 1.9 7.2 15 743 9.1 15 945

HIGH

NONE --- --- 1.9 7.3 15 749 9.2 15 951

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

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

UNIT

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

IFM TYPE

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

CRHEATER*** NOM

(KW) FLA FLA

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

MCA

FUSE

HACR

BRKR

DISC. SIZE

MCA

FUSE

HACR

BRKR

DISC. SIZE

FLA LRA FLA LRA

551J*04

208/230---1---60

D D --- S T D

NONE --- ---

1.9

34.0 50 34 93 35.9 50 36 95

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

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

208/230---3---60

D D --- S T D

NONE --- ---

1.9

26.2 30 27 87 28.1 35 29 89

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

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

MED

NONE --- ---

1.9

23.7 30 24 92 25.6 30 26 94

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

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

HIGH

NONE --- ---

1.9

24.0 30 25 110 25.9 30 27 112

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

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

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

D D --- S T D

NONE --- ---

1.0

14.0 20 14 45 15.0 20 16 46

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

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

MED

NONE --- ---

1.0

12.1 15 12 47 13.1 15 13 48

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

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

HIGH

NONE --- ---

1.0

12.6 15 13 56 13.6 20 14 57

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

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

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

D D --- S T D

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

MED

NONE --- --- 1.9 8.9 15 945 10.8 15 11 47

HIGH

NONE --- --- 1.9 9.0 15 951 10.9 15 11 53

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

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

UNIT

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

IFM TYPE

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

CRHEATER*** NOM

(KW) FLA FLA

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

MCA

FUSE

HACR

BRKR

DISC. SIZE

MCA

FUSE

HACR

BRKR

DISC. SIZE

FLA LRA FLA LRA

551J*05

208/230---1---60

D D --- S T D

NONE --- ---

1.9

36.1 50 35 127 38.0 50 37 129

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

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

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

208/230---3---60

D D --- S T D

NONE --- ---

1.9

25.9 30 26 93 27.8 40 28 95

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

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

MED

NONE --- ---

1.9

23.4 30 23 98 25.3 30 25 100

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

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

HIGH

NONE --- ---

1.9

23.7 30 23 116 25.6 30 26 118

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

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

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

D D --- S T D

NONE --- ---

1.0

12.7 15 13 47 13.7 20 14 48

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

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

MED

NONE --- ---

1.0

10.8 15 11 49 11.8 15 12 50

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

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

HIGH

NONE --- ---

1.0

11.3 15 11 58 12.3 15 12 59

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

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

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

D D --- S T D

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

MED

NONE --- --- 1.9 8.8 15 944 10.7 15 11 46

HIGH

NONE --- --- 1.9 8.9 15 950 10.8 15 11 52

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

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

UNIT

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

IFM TYPE

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

CRHEATER*** NOM

(KW) FLA FLA

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

MCA

FUSE

HACR

BRKR

DISC. SIZE

MCA

FUSE

HACR

BRKR

DISC. SIZE

FLA LRA FLA LRA

551J*05

208/230---1---60

D D --- S T D

NONE --- ---

1.9

40.9 60 41 132 42.8 60 43 134

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

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

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

208/230---3---60

D D --- S T D

NONE --- ---

1.9

30.7 40 31 98 32.6 45 34 100

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

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

MED

NONE --- ---

1.9

28.2 40 29 103 30.1 40 31 105

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

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

HIGH

NONE --- ---

1.9

28.5 40 29 121 30.4 40 31 123

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

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

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

D D --- S T D

NONE --- ---

1.0

14.9 20 15 49 15.9 20 16 50

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

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

MED

NONE --- ---

1.0

13.0 15 13 51 14.0 20 14 52

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

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

HIGH

NONE --- ---

1.0

13.5 20 14 60 14.5 20 15 61

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

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

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

D D --- S T D

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

MED

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

HIGH

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

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

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

UNIT

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

IFM TYPE

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

CRHEATER*** NOM

(KW) FLA FLA

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

MCA

FUSE

HACR

BRKR

DISC. SIZE

MCA

FUSE

HACR

BRKR

DISC. SIZE

FLA LRA FLA LRA

551J*06

208/230---1---60

D D --- S T D

NONE --- ---

1.9

40.1 60 39 144 42.0 60 41 146

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

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

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

208/230---3---60

D D --- S T D

NONE --- ---

1.9

28.7 40 28 120 30.6 45 31 122

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

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

MED

NONE --- ---

1.9

26.5 40 26 143 28.4 40 28 145

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

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

HIGH

NONE --- ---

1.9

28.8 40 29 169 30.7 45 31 171

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

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

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

D D --- S T D

NONE --- ---

1.0

13.7 20 14 58 14.7 20 15 59

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

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

MED

NONE --- ---

1.0

12.3 15 12 69 13.3 20 13 70

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

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

HIGH

NONE --- ---

1.0

13.1 20 13 82 14.1 20 14 83

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

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

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

D D --- S T D

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

MED

NONE --- --- 1.9 9.3 15 953 11.2 15 11 55

HIGH

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

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

551J

Table5UnitWire/FuseorHACRBreakerSizingData(cont)

UNIT

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

IFM TYPE

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

CRHEATER*** NOM

(KW) FLA FLA

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

MCA

FUSE

HACR

BRKR

DISC. SIZE

MCA

FUSE

HACR

BRKR

DISC. SIZE

FLA LRA FLA LRA

551J*06

208/230---1---60

D D --- S T D

NONE --- ---

1.9

44.9 60 44 149 46.8 60 47 151

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

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

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

208/230---3---60

D D --- S T D

NONE --- ---

1.9

33.5 45 34 125 35.4 50 36 127

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

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

MED

NONE --- ---

1.9

31.3 45 31 148 33.2 45 34 150

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

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

HIGH

NONE --- ---

1.9

33.6 45 34 174 35.5 50 36 176

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

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

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

D D --- S T D

NONE --- ---

1.0

15.9 20 16 60 16.9 20 17 61

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

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

MED

NONE --- ---

1.0

14.5 20 15 71 15.5 20 16 72

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

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

HIGH

NONE --- ---

1.0

15.3 20 16 84 16.3 20 17 85

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

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

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

D D --- S T D

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

MED

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

HIGH

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

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

551J

Legend and Notes for Table 5

LEGEND:

BRKR --- Circuit breaker

CO --- Convenient outlet

DD --- Direct drive

indoor fan motor

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 de-

termine the percentage of voltage imbalance.

% Voltage Imbalance = 100 x

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 =

(224 + 231 + 226)

681

= 227

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

227

= 1.76%

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%, con-

tact your local electric utility company immediately.

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.

551J

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

CO2sensor

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

551J

Bryant 551J Users Manual II551J 02

551J to the manual 1bf40f6d-82eb-4bcc-bc1d-2ab79d1b5afa

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