Bryant Puron 581J Users Manual II581J 10

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581J

SINGLE PACKAGE ROOFTOP

GAS HEATING/ELECTRIC COOLING UNIT

SIZES 07, 08, 09 & 12 with PURONR(R--410A) REFIRGERANT

Installation Instructions

NOTE: Read the entire instruction manual before starting

the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2....................

INSTALLATION 7...............................

Jobsite Survey 7................................

Step 1 -- Plan for Unit Location 7..................

Roof Mount 7...............................

Step 2 -- Plan for Sequence of Unit Installation 8......

Curb--Mount Installation 8.....................

Pad--Mount Installation 8......................

Frame--Mount Installation 8....................

Step 3 -- Inspect Unit 8...........................

Step 4 -- Provide Unit Support 8...................

Roof Curb Mount 8..........................

Slab Mount (Horizontal Units Only) 8...........

Alternate Unit Support

(In Lieu of Curb or Slab Mount) 8..............

Step 5 -- Field Fabricate Ductwork 11...............

Step 6 -- Rig and Place Unit 11....................

Positioning on Curb 12.......................

Step 7 -- Convert to Horizontal & Connect Ductwork 12...

Step 8 -- Install Outside Air Hood 12...............

Economizer and Two Position Damper Hood

Package Removal and Setup — Factory Option 12..

Economizer Hood and Two--Position Hood 13.....

Step 9 -- Install Flue Hood 13.....................

Step 10 -- Install Gas Piping 13....................

Factory--Option Thru--Base Connections

(Gas Connections) 14.........................

Step 11 -- Install External Condensate Trap and Line 16..

Step 12 -- Make Electrical Connections 17...........

Field Power Supply 17........................

Units with Factory--Installed Disconnect 17.......

Units without Factory--Installed Disconnect 17....

All Units 17................................

Convenience Outlets 18.......................

Factory--Option Thru--Base Connections

(Electrical Connections) 19....................

Units without Thru--Base Connections 19.........

Field Control Wiring 19.......................

Thermostat 19...............................

Unit without Thru--Base Connection Kit 20.......

Heat Anticipator Settings 20...................

Perfect HumiditytControl Connections 21........

Perfect Humidity -- Space RH Controller 21.......

RTU Open Control System 23...................

Supply Air Temperature (SAT) Sensor 26.........

Outdoor Air Temperature (OAT) Sensor 26.......

EconoMi$er2 27.............................

Field Connections 27..........................

Space Temperature (SPT) Sensors 27............

Indoor Air Quality (CO2)Sensor 28.............

Outdoor Air Quality Sensor 28.................

Smoke Detector/Fire Shutdown (FSD) 29.........

Space Humidity Sensor or Humidistat 29.........

Connecting Discrete Inputs 30..................

Communication Wiring -- Protocols 31............

General 31.................................

Local Access 32..............................

RTU Open Troubleshooting 32.................

Outdoor Air Enthalpy Control 33.................

Differential Enthalpy Control 33................

Return Air Enthalpy Sensor 34.................

Smoke Detectors 34...........................

System 34..................................

Controller 34...............................

Sensor Module 34...........................

Smoke Detector Locations 35....................

Supply Air 35...............................

Return Air without Economizer 35..............

Return Air with Economizer 35.................

Step 13 -- Adjust Factory--Installed Options 40........

Step 14 -- Install Accessories 40...................

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.

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury or death.

Disconnect gas piping from unit when leak testing at

pressure greater than 0.5 psig (3450 Pa). Pressures

greater than 0.5 psig (3450 Pa) will cause gas valve

damage resulting in hazardous condition. If gas valve

is subjected to pressure greater than 0.5 psig (3450

Pa), it must be replaced before use. When pressure

testing field--supplied gas piping at pressures of 0.5

psig (3450 Pa) or less, a unit connected to such piping

must be isolated by closing the manual gas valve.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal

injury or death.

Before performing service or maintenance operations

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

install lock(s) and lockout tag(s). 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

air conditioning equipment.

CAUTION

581J

Horizontal Connections / Economizer

Vertical Connections / Economizer

C11110

Fig. 1 -- Unit Dimensional Drawing — Sizes 07--09

581J

C11111

Fig. 1 -- Unit Dimensional Drawing — Sizes 07--09 (cont.)

581J

Vertical Connections / Economizer

Horizontal Connections / Economizer

C11112

Fig. 2 -- Unit Dimensional Drawing — Size 12

581J

C11113

Fig. 2 -- Unit Dimensional Drawing — Size 12 (cont.)

581J

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 the minimum clearances

required for safety. This includes the clearance to

combustible surfaces, unit performance and service access

below, around and above unit as specified in unit

drawings. See Fig. 3.

18” (457)

42" (1067)

18" (457)

42" (1067)

Required bottom condensate drain connection.

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

C10145

Fig. 3 -- Service Clearance Dimensional Drawing

NOTE: Consider also the effect of adjacent units.

Be sure that the unit is installed such that snow will not

block the combustion intake or flute outlet.

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. For proper unit operation, adequate combustion and

ventilation air must be provided in accordance with

Section 5.3 (Air for Combustion and Ventilation) of the

National Fuel Gas Code, ANSI Z223.1 (American

National Standards Institute) and NFPA (National Fire

Protection Association) 54 TIA----54----84----1. In Canada,

installation must be in accordance with the CAN1----B149

installation codes for gas burning appliances.

Although unit is weatherproof, avoid locations that permit

water from higher level runoff and overhangs to fall onto

the unit.

Locate mechanical draft system flue assembly at least 4 ft

(1.2 m) from any opening through which combustion

products could enter the building, and at least 4 ft (1.2 m)

from any adjacent building (or per local code). Locate the

flue assembly at least 10 ft (3.05 m) from an adjacent

unit’s fresh air intake hood if within 3 ft (0.91 m) of same

elevation (or per local code). When unit is located

adjacent to public walkways, flue assembly must be at

least 7 ft (2.1 m) above grade.

Select a unit mounting system that provides adequate

height to allow installation of condensate trap per

requirements. Refer to Step 11 — Install External

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.

Table 1 – Operating Weights

581J* UNITS LB (KG)

07 08 09 12

Base Unit 765 (347) 925 (419.5) 925 (419.5) 1099 (499)

Economizer

Vertical 50 (23) 80 (36) 80 (36) 80 (36)

Horizontal 80 (36) 105 (48) 105 (48) 105 (48)

Powered Outlet 32 (15) 32 (15) 32 (15) 32 (15)

Perfect Humidity™ System 41 (19) 70 (32) 70 (32) 75 (34)

Curb

14--- in/356 mm 110 (50) 133 (65) 133 (65) 133 (65)

24--- in/610 mm 145 (66) 174 (79) 174 (79) 174 (79)

581J

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 11 for

details)

Rig and place unit

Install outdoor air hood

Install flue hood

Install gas piping

Install condensate line trap and piping

Make electrical connections

Install other accessories

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 flue hood

Install gas piping

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. 4 and Fig. 5. Assemble and install accessory roof curb

in accordance with instructions shipped with the curb.

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. 4 and Fig. 5. Improperly

applied gasket can also result in air leaks and poor unit

performance.

Curb should be level. This is necessary for unit drain to

function properly. Unit leveling tolerances are show in

Fig. 6. 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 field--installed thru--the--roof

curb gas connections are desired, use factory--supplied

pipe coupling and gas plate assembly to mount the

thru--the--roof curb connection to the roof curb. Gas

connections and power connections to the unit must be

field installed after the unit is installed 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.

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

(InLieuofCurborSlabMount)—

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.

581J

581J*07-09

UNIT SIZE

ROOFCURB

ACCESSORY

CRRFCURB003A01

CRRFCURB004A01

1’ - 2”

[356]

2’ - 0”

[610]

C11081

Fig. 4 -- Roof Curb Details — Sizes 07--09

581J

581J*12

UNIT SIZE

ROOFCURB

ACCESSORY

CRRFCURB003A02

CRRFCURB004A02

1’ - 2”

[356]

2’ - 0”

[610]

C11082

Fig. 5 -- Roof Curb Details — Size 12

581J

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

C06110

Fig. 6 -- 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. Do not connect ductwork to unit.

Fabricate supply ductwork so that the cross sectional

dimensions are equal to or greater than the unit supply

duct opening dimensions for the first 18 in. (458 mm) of

duct length from the unit basepan.

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 minimum clearance is not required around ductwork.

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damage

to roofing materials.

Membrane roofs can be cut by sharp sheet metal

edges. Be careful when placing any sheet metal parts

on such roof.

CAUTION

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. 7 for additional information.

Lifting holes are provided in base rails as shown in Fig. 7.

Refer to rigging instructions on unit.

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

Before setting the unit onto the curb, recheck gasketing on

curb.

C06005

UNIT MAX WEIGHT DIMENSIONS

A B C

LB KG IN MM IN MM IN MM

581J*07 1200 545 88.0 2235 44.0 1120 41.5 1055

581J*08 1420 645 88.0 2235 44.0 1120 49.5 1255

581J*09 1420 645 88.0 2235 44.0 1120 49.5 1255

581J*12 1665 757 88.0 2235 32.0 815 49.5 1255

NOTES:

1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.

2. Dimensions in ( ) are in millimeters.

3. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit center of gravity. Use

wooden top to prevent rigging straps from damaging unit.

Fig. 7 -- Rigging Details

581J

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 back, 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. 4 and Fig. 5, section C--C.

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Flue vent discharge must have a minimum horizontal

clearance of 4 ft (1220 mm) from electric and gas meters,

gas regulators, and gas relief equipment. Minimum

distance between unit and other electrically live parts is

48 inches (1220 mm).

Flue gas can deteriorate building materials. Orient unit such

that flue gas will not affect building materials. Locate

mechanical draft system flue assembly at least 48 in. (1220

mm) from an adjacent building or combustible material.

NOTE: Installation of accessory flue discharge deflector

kit will reduce the minimum clearance to combustible

material to 18 in. (460 mm).

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. 8.

C06108

Fig. 8 -- 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

Economizer and Two Position Damper Hood

Package Removal and Setup -- Factory Option

1. The hood is shipped in knock--down form and must be

field assembled. The indoor coil access panel is used as

the hood top while the hood sides, divider and filter are

packaged together, attached to a metal support tray us-

ing plastic stretch wrap, and shipped in the return air

compartment behind the indoor coil access panel. The

hood assembly’s metal tray is attached to the basepan

and also attached to the damper using two plastic tie--

wraps.

2. To gain access to the hood, remove the filter access

panel. (See Fig. 9.)

FILTER ACCESS PANEL

INDOOR COIL ACCESS PANEL

C10146

Fig. 9 -- Typical Access Panel Locations

3. Locate the (2) screws holding the metal tray to the

basepan and remove. Locate and cut the (2) plastic

tie--wraps securing the assembly to the damper. (See

Fig. 10) Be careful to not damage any wiring or cut

tie--wraps securing any wiring.

Hood Parts

Plastic Tie Wrap

Qty (2)

Screws for Metal Tray

Qty (2)

C08639

Fig. 10 -- Economizer and Two--Position Damper

Hood Parts Location

581J

4. Carefully lift the hood assembly (with metal tray)

through the filter access opening and assemble per the

steps outlined in Economizer Hood and Two–Position

Hood, below.

Economizer Hood and Two--Position 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. 11.

TOP

PANEL

INDOOR

COIL

ACCESS

PANEL

INDOOR

COIL

ACCESS

PANEL

CAULK

HERE

TOP

PANEL

C06025

Fig. 11 -- Indoor Coil Access Panel Relocation

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. 12.

TOP

PANEL

INDOOR COIL

ACCESS PANEL

19 1/16”

SCREW

HOOD DIVIDER

LEFT

HOOD

SIDE

33 3/8”

(848mm)

(483mm)

C06026

Fig. 12 -- Economizer Hood Construction

3. Remove the shipping tape holding the economizer

barometric relief damper in place (economizer only).

4. Insert the hood divider between the hood sides. See

Fig. 12 and 13. 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. 13.

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

and the hood top.

7. Replace the filter access panel.

DIVIDER

BAROMETRIC

RELIEF

CLEANABLE

ALUMINUM

FILTER FILTER

HOOD

FILTER

CLIP

OUTSIDE

AIR

C08634

Fig. 13 -- Economizer Filter Installation

Step 9 — Install Flue Hood

Flue hood is shipped screwed to the basepan beside the

burner compartment access panel. Remove from shipping

location and using screws provided, install flue hood and

screen in location shown in Fig. 14.

BLOWER

ACCESS

PANEL

C07081

Fig. 14 -- Flue Hood Details

Step 10 — Install Gas Piping

Installation of the gas piping must be accordance with

local building codes and with applicable national codes.

In U.S.A., refer to NFPA 54/ANSI Z223.1 National Fuel

Gas Code (NFGC). In Canada, installation must be

accordance with the CAN/CSA B149.1 and CAN/CSA

B149.2 installation codes for gas burning appliances.

581J

This unit is factory equipped for use with Natural Gas fuel

at elevations up to 2000 ft (610 m) above sea level. Unit

may be field converted for operation at elevations above

2000 ft (610 m) and/or for use with liquefied petroleum

fuel. See accessory kit installation instructions regarding

these accessories.

NOTE: Furance gas input rate on rating plate is for

installation up to 2000 ft (610 m) above sea level. In

U.S.A. the input rating for altitudes above 2000 ft (610 m)

must be derated by 4% for each 1000 ft (305 m) above sea

level. In Canada the input rating must be derated by 10%

for altitudes of 2000 ft (610 m) to 4500 ft (1372 m) above

sea level.

For natural gas applications, gas pressure at unit gas

connection must not be less than 4 in. wg (996 Pa) or

greater than 13 in. wg (3240 Pa) while the unit is

operating. For liquified petroleum applications, the gas

pressure must not be less than 11 in. wg (2740 Pa) or

greater than 13 in. wg (3240 Pa) at the unit connection.

The gas supply pipe enters the unit at the burner access

panel on the front side of the unit, through the long slot at

the bottom of the access panel. The gas connection to the

unit is made to the 1/2-- i n . o r 3/4--in. FPT gas inlet port on

the unit gas valve.

Table 2 – Natural Gas Supply Line Pressure Ranges

UNIT MODEL UNIT SIZE MIN MAX

581J 07, 08, 09, 12 4.0 in. wg

(996 Pa)

13.0 in. wg

(3240 Pa)

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in damage

to equipment.

When connecting the gas line to the unit gas valve,

the installer MUST use a backup wrench to prevent

damage to the valve.

CAUTION

Install a gas supply line that runs to the unit heating

section. Refer to the NFPA 54/NFGC or equivalent code

for gas pipe sizing data. Do not use a pipe smaller than the

size specified. Size the gas supply line to allow for a

maximum pressure drop of 0.5--in wg (124 Pa) between

gas regulator source and unit gas valve connection when

unit is operating at high--fire flow rate.

The gas supply line can approach the unit in three ways:

horizontally from outside the unit (across the roof),

thru--curb/under unit basepan (accessory kit required) or

through unit basepan (factory--option or accessory kit

required). Consult accessory kit installation instructions

for details on these installation methods. Observe clearance

to gas line components per Fig. 15.

LEGEND

Field supplied.

NOTE: Follow all local codes.

NFGC – National Fuel Gas Code

STEEL PIPE

NOMINAL DIAMETER

(in.)

SPACINGOFSUPPORTS

X DIMENSION

(ft)

1/2

3/4

or 1

1/4

or larger

BASE UNIT

BASE RAIL

ROOF

CURB

9” MINIMUM CLEARANCE

FOR PANEL REMOVAL

MANUAL GAS

SHUTOFF VALVE

GAS

REGULATOR

48” MINIMUM

DRIP LEG

PER NFGC

FIELD-FABRICATED

SUPPORT

FROM

GAS

METER

C11091

Fig. 15 -- Gas Piping Guide

(with Accessory Thru--the--Curb Service Connections)

Factory--Option Thru--Base Connections

(Gas Connections) —

This service connection kit consists of a NPT gas adapter

fitting, an electrical bulkhead connector and a 3/4-- i n

electrical bulkhead connector, all factory--installed in the

embossed (raised) section of the unit basepan in the

condenser section.

LOW VOLTAGE

CONDUIT

CONNECTOR

STAINLESS STEEL FITTING

HIGH VOLTAGE

CONDUIT

CONNECTOR

C008621

Fig. 16 -- Thru--Base Connection Fittings

The thru--base gas connector has male and female threads.

The male threads protrude above the basepan of the unit;

the female threads protrude below the basepan.

Check tightness of connector lock nuts before connecting

gas piping.

Gas Line: Install a 1/2--in (08 & 09 size Low Gas units

only) or 3/4--in (for all other units) NPT street elbow on

the thru--base gas fitting. Attach an appropriate size pipe

nipple with minimum length of 16--in (406 mm)

(field--supplied) to the street elbow and extend it through

the access panel at the gas support bracket. See Fig. 17.

581J

EMBOSSMENT STAINLESS STEEL FITTING SUPPORT

BRACKET

C08579

Fig. 17 -- Gas Line Piping

Other hardware required to complete the installation of

the gas supply line will include a manual shutoff valve, a

sediment trap (drip leg) and a ground--joint union. A

pressure regulator valve may also be required (to convert

gas pressure from pounds to inches of pressure). The

manual shutoff valve must be located within 6--ft (1.83 m)

of the unit. The union, located in the final leg entering the

unit, must be located at least 9--in (230 mm) away from

the access panel to permit the panel to be removed for

service. If a regulator valve is installed, it must be located

a minimum of 4--ft (1220 mm) away from the unit’s flue

outlet. Some municipal codes require that the manual

shutoff valve be located upstream of the sediment trap.

See Fig. 18 and Fig. 19 for typical piping arrangements

for gas piping that has been routed through the sidewall of

the curb. See Fig. 20 for typical piping arrangement when

thru--base is used. Ensure that all piping does not block

access to the unit’s main control box or limit the required

working space in front of the control box.

When installing the gas supply line, observe local codes

pertaining to gas pipe installations. Refer to the NFPA

54/ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA

B149.1). In the absence of local building codes, adhere to

the following pertinent recommendations:

1. Avoid low spots in long runs of pipe. Grade all pipe

1/4--in. in every 15 ft (7 mm in every 5 m) to prevent

traps. Grade all horizontal runs downward to risers.

Use risers to connect to heating section and to meter.

2. Protect all segments of piping system against physical

and thermal damage. Support all piping with appro-

priate straps, hangers, etc. Use a minimum of one

hanger every 6 ft (1.8 m). For pipe sizes larger than

1/2--in., follow recommendations of national codes.

3. Apply joint compound (pipe dope) sparingly and only

to male threads of joint when making pipe connec-

tions. Use only pipe dope that is resistant to action of

liquefied petroleum gases as specified by local and/or

national codes. If using PTFE (Teflon) tape, ensure

the material is Double Density type and is labeled for

use on gas lines. Apply tape per manufacturer’s in-

structions.

4. Pressure--test all gas piping in accordance with local

and national plumbing and gas codes before connect-

ing piping to unit.

9” (229mm) min

Union

Shut Off

Valve

Drip

Leg

Thru-Curb Adapter

Unit Base Rail

C07469

Fig. 18 -- Gas Piping with Thru--Curb Accessory

Drip

Leg

Shut Off

Valve

Union

Thru-Curb Adapter

Burner

Access

Panel

9” (229mm) min

Unit Base Rail

C07470

Fig. 19 -- Gas Piping with Thru--Curb Accessory

(alternate layout)

C08018

Fig. 20 -- Gas Piping with Thru--Base Accessory

581J

NOTE: Pressure test the gas supply system after the gas

supply piping is connected to the gas valve. The supply

piping must be disconnected from the gas valve during the

testing of the piping systems when test pressure is in

excess of 0.5 psig (3450 Pa). Pressure test the gas supply

piping system at pressures equal to or less than 0.5 psig

(3450 Pa). The unit heating section must be isolated from

the gas piping system by closing the external main manual

shutoff valve and slightly opening the ground--joint union.

Check for gas leaks at the field--installed and

factory--installed gas lines after all piping connections

have been completed. Use soap--and--water solution (or

method specified by local codes and/or regulations).

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

SConnect gas pipe to unit using a backup wrench to

avoid damaging gas controls.

SNever purge a gas line into a combustion chamber.

SNever test for gas leaks with an open flame. Use a

commercially available soap solution made

specifically for the detection of leaks to check all

connections.

SUse proper length of pipe to avoid stress on gas

control manifold.

!WARNING

NOTE: If orifice hole appears damaged or it is suspected

to have been redrilled, check orifice hole with a numbered

drill bit of correct size. Never redrill an orifice. A

burr--free and squarely aligned orifice hole is essential for

proper flame characteristics.

BURNER

ORIFICE

A93059

Fig. 21 -- Orifice Hole

Step 11 — 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. 22. Unit airflow configuration

does not determine which drain connection to use. Either

drain connection can be used with vertical or horizontal

applications.

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 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.

DRAIN

(FACTORY-INSTALLED)

PLUG

CONDENSATE PAN (SIDE VIEW)

STANDARD

SIDE DRAIN

ALTERNATE

BOTTOM DRAIN

C08021

Fig. 22 -- Condensate Drain Pan (Side View)

The piping for the condensate drain and external trap can

be completed after the unit is in place. See Fig. 23.

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. 23 -- 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.).

581J

Step 12 — 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: Field--supplied wiring shall conform with the

limitations of minimum 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 (see Fig. 24).

C IFC

Disconnect factory test leads

and discard.

Optional

Disconnect

Switch

13 13

L1 L2 L3

208/230-3-60

460-3-60

575-3-60

Units Without Disconnect Option

Units With Disconnect Option

Factory

Wiring

Disconnect

per

NEC

C11109

Fig. 24 -- Power Wiring Connections

Field power wires will be connected line--side pressure

lugs on the power terminal block or at factory--installed

option non--fused disconnect.

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 #4 AWG

(copper only).

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.

!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 581J unit. Use only copper wire. (See Fig. 25.)

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

A93033

Fig. 25 -- Disconnect Switch and Unit

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.

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. 24 for power wiring

connections to the unit power terminal block and equipment

ground. Maximum wire size is #4 ga AWG per pole.

581J

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 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 208-v 1/4-in. male terminal

on the primary side of the transformer. Refer to unit label

diagram for additional information.

Voltage to compressor terminals during operation must be

within voltage range indicated on unit nameplate. See

Table 5. 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.

NOTE: Check all factory and field electrical connections

for tightness.

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.

Lock--out and tag--out this switch, if necessary.

!WARNING

Convenience

Outlet

GFCI

Pwd-CO

Fuse

Switch

Pwd-CO

Transformer

Control Box

Access Panel

C08128

Fig. 26 -- Convenience Outlet Location

Two types of convenience outlets are offered on 581J

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. 26.

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. LOCK--OUT AND TAG--OUT

ALL POWER.

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. 27. 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. 27 -- 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

581J

convenience outlet; access is through the unit’s control

box access panel. See Fig. 26.

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. 28.

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. 28 -- Powered Convenience Outlet Wiring

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 (i.e., limit loads exceeding 8--amps to 30

minutes of operation every hour).

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.

Fuse on power type: The factory fuse is a Bussman

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

type plug fuse.

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.

Factory--Option Thru--Base Connections

(Electrical Connections) —

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

bulkhead connector and a 11/4--in electrical bulkhead

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

section of the unit basepan in the condenser section. The

1/2--in bulkhead connector enables the low--voltage control

wires to pass through the basepan. The 11/4--in electrical

bulkhead connector allows the high--voltage power wires

to pass through the basepan. See Fig. 16.

Check tightness of connector lock nuts before connecting

electrical conduits.

Field--supplied and field--installed liquidtight 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. 24.

Field Control Wiring —

The 581J 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 2--stage thermostat

according to installation instructions included with the

accessory. 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.

581J

For wire runs up to 50 ft. (15 m), use no. 18 AWG

(American Wire Gage) insulated wire (35_C minimum).

For50to75ft.(15to23m),useno.16AWGinsulated

wire (35_C minimum). For over 75 ft. (23 m), use no. 14

AWG insulated wire (35_C 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

T–STAT

O/B/Y2

(see Note)

Note : Typical multi-function marking. Follow manufacturer’s configuration

instructions to select Y2.

Field Wiring

C09350

Fig. 29 -- Typical Low--Voltage Control Connections

Unit without Thru--Base Connection Kit —

Pass the thermostat control wires through the hole

provided in the end panel (see item “D” in the view

labeled “LEFT” in Fig. 1 or Fig. 2); 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 Central Terminal Board (CTB).

See Fig. 30.

RACEWAY

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 30 -- 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.

581J

Perfect HumiditytControl Connections

Perfect Humidity -- Space RH Controller —

NOTE: Perfect Humidity is a factory installed option

which is only available for units equipped with belt--drive

motors.

The Perfect Humidity dehumidification system requires a

field--supplied and --installed space relative humidity

control device. This device may be a separate humidistat

control (contact closes on rise in space RH above control

setpoint) or a combination thermostat--humidistat control

device such as Bryant’s EDGERPro Thermidistat with

isolated contact set for dehumidification control. The

humidistat is normally used in applications where a

temperature control is already provided (such as a

third--party Building Management System).

To connect a field--supplied humidistat:

1. Route the humidistat 2--conductor cable (field--sup-

plied) through the hole provided in the unit corner

post.

2. Feed wires through the raceway built into the corner

post (see Fig. 30) to the 24--v barrier located on the

left side of the control box. The raceway provides the

UL--required clearance between high--voltage and

low--voltage wiring.

3. Use wire nuts to connect humidistat cable to two

PINK leads in the low–voltage wiring as shown in

Fig. 32. Refer to the instructions for the field--sup-

plied humidistat for more information.

To connect the Edge Programmable Thermidistat

(T6--PRH01--A):

1. Route the Edge Programmable Thermostat multi--

conductor cable (field--supplied) through the hole

provided in the unit corner post.

2. Feed wires through the raceway build into the corner

post (see Fig. 30) to the 24--v barrier located on the

left side of the control box. The raceway provides the

UL--required clearance between high--voltage and

low--voltage wiring.

3. The Edge Programmable Thermostat has dry contacts

at terminals D1 and D2 for dehumidification

operation (see Fig. 33). The dry contacts must be

wired between CTB terminal R and the PINK lead to

the LTLO switch with field--supplied wire nuts. Refer

to the installation instructions included with the

Bryant Edge Programmable Thermidistat device for

more information.

C09502

Fig. 31 -- Edge Programmable Thermostat

581J

HUMIDISTAT

C11071

Fig. 32 -- Typical Perfect HumiditytDehumidification System Humidistat Wiring

O/W2/B

OAT

RRS

SRTN

HUM

V+

Edge Programable Thermostat Unit CTB

THERMOSTAT

*Connection not required.

Perfect Humidity™ FIOP

C09501

Fig. 33 -- Typical Rooftop Unit with Perfect Humidity Dehumidification System with Edge Programmable Thermostat

581J

RTU Open Control System

The RTU Open control is factory--mounted in the

48DC*D unit’s main control box, to the left of the CTB.

See Fig. 35. Factory wiring is completed through

harnesses connected to the CTB. Field connections for

RTU Open sensors will be made at the Phoenix connectors

on the RTU Open board. The factory--installed RTU Open

control includes the supply--air temperature (SAT) sensor.

The outdoor air temperature (OAT) sensor is included in

the FIOP/accessory EconoMi$er2 package.

The RTU Open controller is an integrated component of the

Bryant rooftop unit. Its internal application programming

provides optimum performance and energy efficiency. RTU

Open enables the unit to run in 100% stand--alone control

mode, Bryant’s I--Vu Open network, or a Third Party

Building Automation System (BAS). On--board DIP

switches allow you to select your protocol (and baud rate) of

choice among the four most popular protocols in use today:

BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 34.)

Refer to Table 3, RTU Open Controller Inputs and Outputs

for locations of all connections to the RTU Open board.

C10811

Fig. 34 -- RTU Open Multi--Protocol Control Board

581J

C11069

Fig. 35 -- RTU Open System Control Wiring Diagram

581J

C11070

Fig. 36 -- RTU Open System Control Wiring Diagram with Perfect Humidityt

581J

Table 3 – RTU Open Controller Inputs and Outputs

POINT NAME BACnet OBJECT

NAME TYPE OF I/O CONNECTION PIN

NUMBER(S)

DEDICATED INPUTS

Space Temp / Zone Temp zone_temp AI (10K Thermistor) J 2 0 --- 1 , 2

Supply Air Temperature sa_temp AI (10K Thermistor) J 2 --- 1 , 2

Outdoor Air Temperature oa_temp AI (10K Thermistor) J 2 --- 3 , 4

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

Safety Chain Feedback safety_status DI (24 VAC) J 1 --- 9

Compressor Safety Status comp_status DI (24 VAC) J 1 --- 2

Fire Shutdown Status firedown_status DI (24 VAC) J 1 --- 1 0

Enthalpy Status enthalpy_status DI (24 VAC) J 2 --- 6

Humidistat Input Status humstat_status DI (24 VAC) J 5 --- 7

CONFIGURABLE INPUTS

Indoor Air CO2 iaq A I ( 4 --- 2 0 m a )

J 4 --- 2 o r J 4 --- 5Outdoor Air CO2 oaq A I ( 4 --- 2 0 m a )

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

Supply Fan Status* sfan_status DI (24 VAC)

J 5 --- 1 o r J 5 --- 3 o r

J55orJ5---7

Filter Status* filter_status DI (24 VAC)

Door Contact Input* door_contact_status DI (24 VAC)

Occupancy Contact* occ_contact_status DI (24 VAC)

OUTPUTS

Economizer Output econ_output A O ( 4 --- 2 0 m a ) J 2 --- 5

SupplyFanRelayState sfan DO Relay (24VAC , 1A) J 1 --- 4

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

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

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

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

Power Exhaust Relay State pexh DO Relay (24VAC , 1A) J 1 1 --- 3

Dehumidification Relay State dehum 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 Open controller requires the use of a Bryant

space sensor. A standard thermostat cannot be used with

the RTU Open system.

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 581J 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. 37.

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.

SUPPLY AIR RETURN AIR

SUPPLY AIR

TEMPERATURE

SENSOR

ROOF

CURB

C08200

Fig. 37 -- Typical Mounting Location for Supply Air

Temperature (SAT) Sensor on Small Rooftop Units

581J

EconoMi$er2 —

The RTU Open control is used with EconoMi$er2 (option

or accessory) for outdoor air management. The damper

position is controlled directly by the RTU Open 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 Open, at plugs J1, J2, J4, J5, J11 and

J20. All field control wiring that connects to the RTU

Open must be routed through the raceway built into the

corner post as shown in Fig. 30. 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 Open. Connect to the wires to the removable

Phoenix connectors and then reconnect the connectors to

the board.

Space Temperature (SPT) Sensors —

There are 2 types of SPT sensors available from Bryant,

resistive input non-communicating (T55, T56, and T59)

and Rnet communicating (SPS, SPPL, SPP, and SPPF)

sensors. Each type has a variety of options consisting of:

timed override button, set point adjustment, a LCD

screen, and communication tie in. Space temperature can

be also be written to from a building network or zoning

system. However, it is still recommended that return air

duct sensor be installed to allow stand-alone operation for

back-up. Refer to the configuration section for details on

controller configurations associated with space sensors.

S33ZCT55SPT, space temperature sensor with override

button (T--55)

S33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment (T--56)

S33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and

setpoint adjustment (T--59)

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. 38 for typical T--55 internal

connections. Connect the T--55 SEN terminals to RTU

Open J20--1 and J20--2. See Fig. 39.

2345 61

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-) CCN COM

SENSOR WIRING

C08201

Fig. 38 -- T--55 Space Temperature Sensor Wiring

SEN

J20-1

J20-2

C08460

Fig. 39 -- RTU Open T--55 Sensor Connections

Connect T--56: See Fig. 40 for T--56 internal connections.

Install a jumper between SEN and SET terminals as

illustrated. Connect T--56 terminals to RTU Open J20--1,

J20--2 and J20--3 per Fig. 41.

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. 40 -- T--56 Internal Connections

SEN J20-1

J20-2

SEN

SET

Jumper

J20-3

SET

C08461

Fig. 41 -- RTU Open T--56 Sensor Connections

581J

Connect T--59: The T--59 space sensor requires a

separate, isolated power supply of 24 VAC. See Fig. 42

for internal connections at the T--59. Connect the SEN

terminal (BLU) to RTU Open 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.

J20-3

J20-2

J20-1

C10291

Fig. 42 -- Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

Indoor Air Quality (CO2)Sensor—

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

requirements and terminal locations. See Fig. 43 for

typical CO2sensor wiring schematic.

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.

87654321

24 VAC

24 VDC

NC ALARM

RELAY

CONTACTS

COM

}

0-10VDC

SIG COM

4-20mA

J3 J4

C08635

Fig. 43 -- Indoor/Outdoor Air Quality (CO2)Sensor

(33ZCSENCO2) -- Typical Wiring Diagram

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. 43. Connect the 4--20 mA terminal to

RTU Open J4--2 and connect the SIG COM terminal to

RTU Open J4--3. See Fig. 44.

SEN

COM

J4-2

J4-3

IAQ Sensor

24 VAC

C08462

Fig. 44 -- RTU Open / 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. 45. The outdoor air CO2sensor must be located in the

economizer outside air hood.

581J

COVER REMOVED SIDE VIEW

C07135

Fig. 45 -- 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. 43. Connect the 4 to 20 mA

terminal to RTU Open J4--5. Connect the SIG COM

terminal to RTU Open J4--6. See Fig. 46.

SEN

COM

J4-5

J4-6

OAQ Sensor/RH Sensor

24 VAC

C08463

Fig. 46 -- RTU Open / Outdoor CO2Sensor

(33ZCSENCO2) Connections

Smoke Detector/Fire Shutdown (FSD) —

On 581J 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 Open

controller communicates the smoke detector’s tripped

status to the BAS building control. See Figs. 35 and 36,

the RTU Open System Control wiring schematics.

The Fire Shutdown Switch configuration,

→

Config

→

Inputs

→

input 5, identifies the

normally open status of this input when there is no fire

alarm.

Space Humidity Sensor or Humidistat —

Perfect HumiditytControl Wiring: In units equipped

with the Perfect Humidity option there are two pink

(PNK) wires loose in the control box used to control the

dehumidification function of the unit. These pink wires

are meant to be tied to a space humidistat or thermidistat

on an electromechanical unit. On RTU Open equipped

units these pink wires must be connected to J11--7 & 8 to

allow the Open board to operate the dehumidification

function for the unit. Disconnect the J11 Phoenix style

connector from the board and use the plug screws to

secure the pink wires in pins 7 and 8, reconnect the plug

to the board at J11.

Relative Humidity Sensors (Space or Duct Mounted):

The accessory space humidity sensor (33ZCSENSRH-01)

or duct humidity sensor (33ZCSENDRH-01) is used to

measure the relative humidity of air within the space or

return air duct. The RH reading is used to control the

Perfect Humiditytoption of the rooftop unit. For wiring

distances up to 500 ft (152 m), use a 3--conductor, 18 or

20 AWG shielded cable. The shield must be removed

from the sensor end of the cable and grounded at the unit

end. The current loop power for sensor is provided by the

RTU Open controller as 24vdc. Refer to the instructions

supplied with the RH sensor for the electrical

requirements and terminal locations. RTU Open

configurations must be changed after adding an RH

sensor. See Fig. 47 and 48 for typical RH sensor wiring.

SJ4--1 or J4--4 = 24vdc loop power

SJ4--2 or J4--5 = 4--20mA signal input

NOTE: The factory default for dehumidification control

is normally open humidistat.

SW2

12345 6

Io Vin Gnd Vo

MOUNTING

HOLES

WIRING

OPENING

Vin - J4-1 or J4-4 24Vdc

Io - J4-2 or J4-5 -20mA output

C11087

Fig. 47 -- Space Relative Humidity Sensor Typical Wiring

581J

Relative Humidity Sensor

(Polarized Male Connector)

J4-1 or J4-4 + 24 VDC Supply Voltage

J4-2 or J4-5 (-) 4 to 20 mA Current Loop Output

to RTU-OPEN

4-20 VAC GND 0-5V

mA or or

VDC 0-10V

SPAN

ZERO

C10839

Fig. 48 -- Duct Relative Humidity Sensor Typical Wiring

Humidistat: Use of a field--supplied humidistat provides

the RTU Open insight to the relative humidity in the

space. The humidistat reads the RH level in the space and

compares it to its setpoint to operate a dry contact. The

humidistat is a dedicated input on the configurable input 9

and tells the RTU Open when the RH level is HIGH or

LOW. The normal condition for humidity is LOW. A

normally open humidistat is the factory default control for

the Perfect Humiditytoption.

To wire in the field:

SJ5--8 = 24 VAC source for dry contact

SJ5--7 = Signal input

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

→

Config

→

Inputs

→

input3,5,8,or9to 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. 34 and Figs. 35 or 36 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. 34 and Figs. 35 or 36 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

→

Config

→

Inputs

→

input3,5,8,or9to 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. 34 and Table 3 for wire

terminations at J5.

Power Exhaust (output): The relay used by the RTU

Open board to control power exhaust is a dry contact

which means it does not have 24vac. This 24vac must be

connected to the relay to allow it to operate the power

exhaust relay in the PE accessory. A 24vac source must be

provided to J11--2 on the RTU Open control board. This

can be provided by the unit’s transformer from various

sources. The “R” terminal on the unit’s low voltage

terminal board (LVTB) is a logical source. Refer to Fig.

34 and Figs. 35 or 36 for wire terminations at J11.

581J

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 Open 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. 49 and 50 for

protocol switch settings and address switches. The 3rd

party connection to the RTU Open is through plug J19.

See Fig. 51 for wiring.

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

switch settings.

Contact your Bryant applications engineer for more

detailed information on protocols, 3rd party wiring, and

networking.

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. 49 -- RTU Open SW3 Dip Switch Settings

C10815

Fig. 50 -- RTU Open Address Switches

C10816

Fig. 51 -- Network Wiring

581J

Local Access

BACview6Handheld: The BACview6is a keypad/display

interface used to connect to the RTU Open to access the

control information, read sensor values, and test the RTU,

see Fig. 52. This is an accessory interface that does not

come with the RTU Open controller and can only be used

at the unit. Connect the BACview6to the RTU Open 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 Open board. The link cable connects

a USB port to the J12 local access port. This program

functions and operates identical to the handheld.

RTU Open 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. See Table 4.

Cable

Access Port

J12

P1 P1

P5 P5

RTU Open

BACview6 Local Access Cable

Protocol Selector

C10812

Fig. 52 -- BACview6Handheld Connections

581J

Table 4 – LEDs

The LEDs on the RTU Open show the status of certain functions

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

Power RTU Open has power

Rx RTU Open is receiving data from the network segment

Tx RTU Open 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:

STurnRTUOpenoff,thenon.

SFormat RTU Open.

SDownload memory to RTU Open.

SReplace RTU Open.

NOTE: Refer to Catalog No. TS--5580J--01 for complete

configuration of RTU Open operating sequences. Contact

your Bryant applications engineer for details on

configuration and troubleshooting of connected networks.

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. 53.)

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. 53. Connect the

enthalpy control power input terminals to economizer

actuator power leads RED (connect to 24V) and BLK

(connect to GND).

7CTB ECON

(RTU Open: to J2-6)

LOW

GND

24V

Enthalpy

Switch

GRA

BLK

RED

Factory Wiring Harness

PL6-1 (24-V)

PL6-4 (COM)

C11169

Fig. 53 -- Enthalpy Switch (33CSENTHSW) Connections

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.

581J

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. 54.

GRA

BLK

RED

– 4-20

Main

+ VDC

Out

– 4-20 Main

Out

+ 24-36

VDC In

LOW

GND

24V

7CTB ECON

(RTU Open: to J2-6)

PL6-1 (24-V)

PL6-4 (COM)

Outside Air

Enthalpy Switch

Return Air

Enthalpy

Sensor

C11170

Fig. 54 -- 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 enthal-

py 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.

Smoke Detectors

Smoke detectors are available as factory--installed options

on 581J 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 36 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. 55) 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).

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. 55 -- Controller Assembly

Sensor Module —

The sensor module (see Fig. 56) 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

581J

takes the appropriate action to shut down fans and

blowers, change over air handling systems, notify the fire

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.

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. 56 -- Smoke Detector Sensor

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. 57. 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. 57 -- 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. 58. 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:” on page 36 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. 58 -- 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. 59. 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.)

581J

Return Air

Sampling Tube

C08129

Fig. 59 -- 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. 60. Save the screws.

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

3. Rotate the detector plate so the sensor is facing out-

wards and the sampling tube connection is on the bot-

tom. See Fig. 61.

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 ex-

haust tube is on the top. See Fig. 61.

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

sampling tube on the basepan.

Flexible

Exhaust Tubes

Screws

Sample Tube

C08126

Fig. 60 -- Return Air Detector Shipping Position

C08127

Fig. 61 -- 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.

581J

Table 5 – Unit Wire/Fuse or HACR Breaker Sizing Data

UNIT

NOM.

V --- P h --- H z

IFM

TYPE

COMBUSTION

FAN MOTOR

FLA

POWER

EXHAUST

FLA

NO C.O. or UNPWR C.O.

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

581J*07

208/230---3---60

STD

0.48 3.8

32.0 50 31 148 35.8 50 36 152

MED 34.3 50 34 185 38.1 50 38 189

HIGH 41.8 60 43 211 45.6 60 47 215

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

STD

0.25 1.8

16.3 25 16 75 18.1 25 18 77

MED 17.1 25 17 94 18.9 25 19 96

HIGH 21.1 30 22 107 22.9 30 24 109

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

STD

0.24 3.8

11.7 15 11 61 15.5 20 16 65

MED 13.3 20 13 76 17.1 20 17 80

HIGH 16.1 20 16 90 19.9 25 21 94

581J*08

208/230---3---60

STD

0.48 3.8

38.8 50 41 191 42.6 50 45 195

MED 38.8 50 41 202 42.6 50 45 206

HIGH 43.6 50 46 245 47.4 60 51 249

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

STD

0.25 1.8

17.9 20 19 95 19.7 25 21 97

MED 17.9 20 19 101 19.7 25 21 103

HIGH 19.7 25 21 123 21.5 25 23 125

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

STD

0.24 3.8

11.9 15 12 77 15.7 20 17 81

MED 12.7 15 13 81 16.5 20 18 85

HIGH 13.5 15 14 92 17.3 20 19 96

581J*09

208/230---3---60

STD

0.48 3.8

39.0 50 41 191 42.8 50 45 195

MED 39.0 50 41 202 42.8 50 45 206

HIGH 43.8 50 46 245 47.6 60 51 249

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

STD

0.25 1.8

18.2 20 19 95 20 25 21 97

MED 18.2 20 19 101 20.0 25 21 103

HIGH 20.0 25 21 123 21.8 25 23 125

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

STD

0.24 3.8

13.2 15 14 77 17 20 18 81

MED 14.0 20 15 81 17.8 20 19 85

HIGH 14.8 20 16 92 18.6 20 20 96

581J*12

208/230---3---60

STD

0.48 3.8

47.2 60 50 282 51.0 60 54 286

MED 52.0 60 55 325 55.8 60 60 329

HIGH 57.0 70 61 334 60.8 70 65 338

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

STD

0.25 1.8

23.0 30 24 135 24.8 30 26 137

MED 24.8 30 26 157 26.6 30 28 159

HIGH 27.8 30 30 161 29.6 35 32 163

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

STD

0.24 3.8

17.3 20 18 105 21.1 25 23 109

MED 18.1 20 19 116 21.9 25 24 120

HIGH 20.9 25 22 130 24.7 30 27 134

See: “Legend and Notes for Table 5” on page 39.

581J

Table 5 — Unit Wire/Fuse or HACR Breaker Sizing Data (cont)

UNIT

NOM.

V --- P h --- H z

IFM

TYPE

COMBUSTION

FAN MOTOR

FLA

POWER

EXHAUST

FLA

w/ PWRD C.O.

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

581J*07

208/230---3---60

STD

0.48 3.8

36.8 50 37 153 40.6 50 41 157

MED 39.1 50 39 190 42.9 60 44 194

HIGH 46.6 60 48 216 50.4 60 52 220

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

STD

0.25 1.8

18.5 25 19 77 20.3 30 21 79

MED 19.3 25 19 96 21.1 30 22 98

HIGH 23.3 30 24 109 25.1 30 26 111

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

STD

0.24 3.8

13.4 20 13 63 17.2 20 18 67

MED 15.0 20 15 78 18.8 25 19 82

HIGH 17.8 25 18 92 21.6 25 23 96

581J*08

208/230---3---60

STD

0.48 3.8

43.6 50 46 196 47.4 60 51 200

MED 43.6 50 46 207 47.4 60 51 211

HIGH 48.4 60 52 250 52.2 60 56 254

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

STD

0.25 1.8

20.1 25 21 97 21.9 25 23 99

MED 20.1 25 21 103 21.9 25 23 105

HIGH 21.9 25 23 125 23.7 30 26 127

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

STD

0.24 3.8

13.6 15 14 79 17.4 20 19 83

MED 14.4 20 15 83 18.2 20 20 87

HIGH 15.2 20 16 94 19.0 25 21 98

581J*09

208/230---3---60

STD

0.48 3.8

43.8 50 46 196 47.6 60 51 200

MED 43.8 50 46 207 47.6 60 51 211

HIGH 48.6 60 52 250 52.4 60 56 254

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

STD

0.25 1.8

20.4 25 22 97 22.2 25 24 99

MED 20.4 25 22 103 22.2 25 24 105

HIGH 22.2 25 24 125 24.0 30 26 127

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

STD

0.24 3.8

14.9 20 16 79 18.7 20 20 83

MED 15.7 20 17 83 19.5 25 21 87

HIGH 16.5 20 18 94 20.3 25 22 98

581J*12

208/230---3---60

STD

0.48 3.8

52.0 60 55 287 55.8 60 60 291

MED 56.8 70 61 330 60.6 70 65 334

HIGH 61.8 70 66 339 65.6 80 71 343

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

STD

0.25 1.8

25.2 30 27 137 27.0 30 29 139

MED 27.0 30 29 159 28.8 35 31 161

HIGH 30.0 35 32 163 31.8 35 34 165

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

STD

0.24 3.8

19.0 25 20 107 22.8 25 25 111

MED 19.8 25 21 118 23.6 30 26 122

HIGH 22.6 25 24 132 26.4 30 29 136

See: “Legend and Notes for Table 5” on page 39.

581J

Legend and Notes for Table 5

LEGEND:

BRKR --- Circuit breaker

CO --- Convenient outlet

DISC --- Disconnect

FLA --- Full load amps

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

(BC) 231 – 227 = 4 v

(AC) 227 – 226 = 1 v

Maximum deviation is 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%, contact your local electric utility company immediately.

581J

Economizer 2 Position Damper Unit Without Economizer o

2 Position Damper

C10150

Fig. 62 -- EconoMi$ertIV Wiring

Step 13 — Adjust Factory--Installed Options

Smoke Detectors —

Smoke detector(s) will be connected at the Controls

Connections Board, at terminals marked “Smoke

Shutdown”. Remove jumper JMP 3 when ready to

energize unit.

EconoMi$er IV Occupancy Switch —

Refer to Fig. 62 for general EconoMi$er IV wiring.

External occupancy control is managed through a

connection on the Central Terminal 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 on CTB. Remove or cut jumper JMP 2 to

complete the installation.

Step 14 — Install Accessories

Available accessories include:

Roof Curb

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

is set on curb)

LP conversion kit

Manual outside air damper

High Altitude Gas kits

Flue Discharge Deflector

Flue Exhaust Heat Shield

Low Ambient Controls

Thermostat / Sensors

Two--Position motorized outside air damper

EconoMi$er2 (without control/for external signal and

integrated barometric relief)

EconoMi$er2 (without control/for external signal)

Power Exhaust

Differential dry--bulb sensor (EconoMi$er IV)

Outdoor enthalpy sensor

Differential enthalpy sensor

CO2sensor

Louvered hail guard

Phase monitor control

Winter Start kit

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: II581J---10

Replaces: II581J---01 & II581J--- 03

581J

Bryant Puron 581J Users Manual II581J 10

581J to the manual d7a354b6-16a1-49bb-a838-a43bd93d26a8

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