Bryant DURAPAC 579F Installation, Start-up And Service Instructions Manual

installation, start-up and
service instructions

SINGLE PACKAGE ROOFTOP
GAS HEATING/ELECTRIC COOLING UNITS

CONTENTS

Page

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22

I. Step 1 — Provide Unit Support. . . . . . . . . . . . . . . . . 1

II. Step 2 — Rig and Place Unit. . . . . . . . . . . . . . . . . . . 3

III. Step 3 — Field Fabricate Ductwork . . . . . . . . . . . . . 8

IV. Step 4 — Make Unit Duct Connections . . . . . . . . . . 8

V. Step 5 — Install Flue Hood and Wind Baffle . . . . . . 8

VI. Step 6 — Trap Condensate Drain . . . . . . . . . . . . . . . 8

VII. Step 7 — Orifice Change. . . . . . . . . . . . . . . . . . . . . . 9

VIII. Step 8 — Install Gas Piping . . . . . . . . . . . . . . . . . . 10

IX. Step 9 — Make Electrical Connections . . . . . . . . . 10

X. Step 10 — Make Outdoor-Air Inlet

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

XI. Step 11 — Install Outdoor-Air Hood. . . . . . . . . . . . 11

XII. Step 12 — Install All Accessories . . . . . . . . . . . . . 13

XIII. Step 13 — Adjust Factory-Installed Options. . . . . 14

XIV. Step 14 — Install Humidistat for Optional

Perfect Humidity™ Dehumidification Package . . . 21

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-28

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-37

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .38-42

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo­nents. Only trained and qualified service personnel should
install, repair, or service a ir-conditioning equip ment.

Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters . A ll other o per­ations should be performed by trained service per sonnel. When
working on air-conditi oning equipme nt, obser v e precautions in
the literature, tags and labels attached to the unit, and other
safety prec au tions that may a pp ly.

Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguishers available for all brazing opera tions.

WARNING: Before performing service or mainte­nance operations on unit, turn off main power switch
to unit and install lockout tag on disconnect switch.
Electrical shock could cause personal injury.

579F

Dura

Cancels: II 579F-180-7 II 579F-180-8

WARNING:

1. Improper installation, adjustment, alteration,
service, or maintena nce c an caus e pr ope rty dam ­age, personal injury, or loss of life. Refer t o the
User’s Information Manual provided with this
unit for more details.

2. Do not store or use gasoline or other flammable
vapors and liquids in the vi cinity of this or any
other appliance.

What to do if yo u sm ell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any elec trical switch, or use an y
phone in your building.

3. IMMEDIATELY call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.

4. If you cannot reach your gas supplier, call the
fire department.

WARNING: Disconnect gas piping from unit when
pressure testing at pressure greater than 0.5 psig.
Pressures greater than 0.5 psig will cause gas valve
damage resulting in hazardous condition. If gas valve is
subjected to pressure grea ter than 0.5 psig, it must be
replaced before use. When pressure testing field­supplied gas piping at pressures of 0.5 psig or less, a
unit connected to such piping must be isolated by clos­ing the manual gas valve(s).

IMPORTANT: Units have high ambient operating limits. If
limits are exceeded, the units will automatically lock the com­pressor out of operation. Manual reset will be required to
restart the compressor.

INSTALLATION

I. STEP 1 — PROVIDE UNIT SUPPORT

A. Roof Curb

Assemble and install accessory roof curb or horizontal
adapter roof curb in accordance with instructions shipped
with this accessory. See Fig. 1 and 2. Install insulation, cant
strips, roofing, and counter flashing as shown. Ductwork can
be installed to roof curb or horizontal adapter roof curb before
unit is set in place. Cur b or ada pt er roof curb shou ld b e le ve l.
This is necessary to permit unit drain to function properly.
Unit leveling tolera nce is ±
tion. Refer to Accessory Roof Curb or Horizontal Adapter Roof
Curb Installation Instructions for additi onal information as
required. When accessory roof curb or horizontal adapter roof
curb is used, unit may be installed on class A, B, or C roof cov­ering material.

1

/16 in. per linear ft in any direc-

Pac

Series

Sizes 180-300

15 to 25 Tons

3/15/06

DESCRIPTION

CURB

HEIGHT

PKG. NO. REF.

Fig. 1 — Roof Curb Details

CRRFCURB010A00 1′− 2″ (305) Standard Curb 14″ High

CRRFCURB011A00 2′-0″ (610) Standard Curb for Units Requiring High Installation

CRRFCURB012A00 2′-0″ (610) Side Supply and Return Curb for High Installation

—2—

3 1/2"

2" X 1/4
SUPPORT TYP.
STITCH WELDED

FULLY INSULATED
SUPPLY PLENUM
1" INSULATION
1 1/2 # DENSITY,
STICK PINNED & GLUED

NOTE: CRRFCURB013A00 is a fully factory preassembled horizontal
adapter and includes an insulated transition duct. The pressure drop
through the adapter curb is negligible.

For horizontal return applications: The power exhaust and barometric

relief dampers must be installed in the return air duct.

Fig. 2 — Horizontal Supply/Return Adapter Installation (579F180-240)

IMPORTANT: The gasketing of the un it to the roof curb or

adapter roof curb is critical for a watertight seal. Install gas­ket with the roof curb or adapter as shown in Fig. 1. Improp­erly applied gasket can also result in air leaks and poor unit
performance.

B. Alternate Unit Support

When the curb or ada pter cannot be used, install unit on a
noncombustible surface. Support unit with sleepers, using
unit curb support area. If sleepers cannot be used, support
long sides of unit with a minimum of 3 equally spaced 4-in. x
4-in. pads on each side.

II. STEP 2 — RIG AND PLACE UNIT

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

Do not drop unit; keep uprig ht. Use spreader bars over unit
to prevent sling or cable damage. Rollers may be used to
move unit across a roof. Level by using unit frame a s a refer­ence; leveling tolerance is ±

1

/16 in. per linear ft in a ny di re c­tion. See Fig. 3 for additional information. Unit operating
weight is shown in Table 1.

Four lifting holes are provided in ends of unit base rails as
shown in Fig. 3. Refer to rigging instructions on unit.

14 3/4"

6"

ACCESSORY

PACKAGE NO.

CRRFCURB013A00

12" WIDE STANDING
SEAM PANELS

CURB

HEIGHT

1′-11″

(584)

DESCRIPTION

Pre-Assembled, Roof Curb,

Horizontal Adapter

23"

A. Positioning

Maintain clearance, per Fig. 4 and 5, around and above unit
to provide minimum distance from combustible materials,
proper airflow, and service access.

Do not install unit in an indoor l ocation. Do not locate unit
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).

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

Locate mechanical draft system flue assembly at least 4 ft
from any opening through which combustion products could
enter the buil ding, and at le ast 4 ft fr om any adj acen t buil d­ing. When unit is located adjacent to public walkways, flue
assembly must be at least 7 ft above grade.

B. Roof Mount

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

Instructions continued on page 8.

—3—

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Refer to Fig. 4 and 5 for unit operating weights.

3. Remove boards at ends of unit and runners prior to rigging.

4. Rig by inserting hooks into unit base rails as shown. Use corner post
from packaging to protect coil from damage. Use bumper boards for
spreader bars on all units.

5. Weights do not include optional EconoMi$erIV. Add 90 lb (41 kg) for
EconoMi$erIV weight.

6. Weights given are for aluminum evaporator and condenser coil plate
fins.

CAUTION: All panels must be in place when rigging

UNIT
579F

MAXIMUM

SHIPPING WEIGHT

lb kg Ft-in. mm Ft-in. mm
180 1775 805 6-11
216 1875 850 6-11
240 1985 900 6-11
300 2135 968 6-11

Fig. 3 — Rigging Details

DIMENSIONS

AB

1

/22121 3-5 1041

1

/22121 3-3 991

1

/22121 3-2 965

1

/22121 3-2 965

—4—

DIM A DIM B DIM C

D

CORNER

C

CORNER

″ (8) on each side

16

/

5

B

CORNER

A

CORNER

WEIGHT

ECONOMI$ERIV

lb kg lb kg lb kg lb kg lb kg lb kg ft-in. mm ft-in. mm ft-in. mm

WEIGHT

STD UNIT

UNIT

•Top: 6′-0″ (1829) to assure proper condenser fan operation.

grounded surfaces.

• Local codes or jurisdiction may prevail.

power exhaust as stated in Note #6, a removable fence or barricade

• Bottom: 14″ (356) to combustible surfaces (when not using curb).

• Control box side: 3′-0″ (914) to ungrounded surfaces, non-combustible.

• Control box side: 3′-6″ (1067) to block or concrete walls, or other

requires no clearance.

for top cover drip edge.

7. With the exception of clearance for the condenser coil and the damper/

8. Dimensions are from outside of corner post. Allow 0′-

4′-0″ (1219) if conditions permit coil removal from the top.

•Rear: 7′-0″ (2134) for coil removal. This dimension can be reduced to

•4′-0″ (1219) to combustible surfaces, all four sides (includes between

NOTES:

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in ( ) are in millimeters.

3. Center of Gravity.

4. Direction of airflow.

5. Ductwork to be attached to accessory roof curb only.

6. Minimum clearance:

579F180 1650 748 90 41 423 192 386 175 403 183 438 199 3-5 1041 3-5 1041 1-10 559

579F216 1800 816 90 41 432 196 410 186 461 209 472 214 3-3 991 3-7 1092 1- 8 508

exhaust if so equipped.

units).

• Right side: 4′-0″ (1219) for proper operation of damper and power

• Front: 4′-0″ (1219) for control box access.

• Left side: 4′-0″ (1219) for proper condenser coil airflow.

Fig. 4 — Base Unit Dimensions; 579F180,216

—5—

DIM A DIM B DIM C

D

CORNER

C

CORNER

B

CORNER

A

CORNER

WEIGHT

ECONOMI$ERIV

″ (8) on each

16

/

5

4′-0″ (1219) if conditions permit coil removal from the top.

•4′-0″ (1219) to combustible surfaces, all four sides (includes between

• Rear: 7′-0″ (2134) for coil removal. This dimension can be reduced to

NOTES:

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in ( ) are in millimeters.

3. Center of Gravity.

4. Direction of airflow.

5. Ductwork to be attached to accessory roof curb only.

6. Minimum clearance:

exhaust if so equipped.

units).

• Right side: 4′-0″ (1219) for proper operation of damper and power

• Front: 4′-0″ (1219) for control box access.

• Left side: 4′-0″ (1219) for proper condenser coil airflow.

grounded surfaces.

• Bottom: 14″ (356) to combustible surfaces (when not using curb).

• Control box side: 3′-0″ (914) to ungrounded surfaces, non-combustible.

• Control box side: 3′-6″ (1067) to block or concrete walls, or other

• Local codes or jurisdiction may prevail.

power exhaust as stated in Note #6, a removable fence or barricade

7. With the exception of clearance for the condenser coil and the damper/

requires no clearance.

side for top cover drip edge.

8. Dimensions are from outside of corner post. Allow 0′-

•Top: 6′-0″ (1829) to assure proper condenser fan operation.

WEIGHT

STD UNIT

UNIT

lb kg lb kg lb kg lb kg lb kg lb kg ft-in. mm ft-in. mm ft-in. mm

579F240 1850 839 90 41 443 201 406 184 476 216 525 238 3-2 965 3-5 1041 1-8 508

579F300 2000 907 90 41 471 214 428 194 526 239 574 260 3-2 965 3-5 1041 1-8 508

Fig. 5 — Base Unit Dimensions; 579F240,300

—6—

Table 1 — Physical Data

NOMINAL CAPACITY (tons) 15 18 20 25
OPERATING WEIGHT (lb) 1650 1800 1850 2000

EconoMi$erIV 90 90 90 90
Roof Curb 200 200 200 200

COMPRESSOR/MANUFACTURER Scroll, Copeland

Quantity...Model (Ckt 1, Ckt 2) 2...SR*942AE
Number of Refrigerant Circuits 2222

Stages of Capacity Control (%) 50/50 60/40 52/48 56/44
Oil (oz) (Ckt 1, Ckt 2) 90, 90 110, 72 110, 110 112, 110

REFRIGERANT TYPE R-22

Expansion Device TXV
Operating Charge (lb-oz)
Circuit 1* 10-13 15-2 16-3 21-0
Circuit 2 10- 5 11-5 14-8 15-4

CONDENSER COIL Cross-Hatched

Rows...Fins/in. 2...17 3...15 3...15 4...15
Total Face Area (sq ft) 21.7 21.7 21.7 21.7

CONDENSER FAN Propeller Type

Nominal Cfm 10,500 9250 13,650 12,500
Quantity...Diameter (in.) 3...22 3...22 2...30 2...30
Motor Hp...Rpm
Watts Input (Total) 1100 1100 3400 3400

EVAPORATOR COIL Cross-Hatched

Rows...Fins/in. 2...17 3...15 3...15 4...15
Total Face Area (sq ft) 17.5 17.5 17.5 17.5

EVAPORATOR FAN Centrifugal Type

Quantity...Size (in.) 2...10 x 10 2...12 x 12 2...12 x 12 2...12 x 12
Type Drive Belt Belt Belt Belt
Nominal Cfm 6000 7200 8000 10,000
Motor Hp 3.7 5 7.5 10
Motor Nominal Rpm 1725 1745 1745 1740

Maximum Continuous Bhp 4.25 5.90
Motor Frame Size 56H 184T 213T 215T

Fan Rpm Range Low-Medium Static 891-1179 910-1095 1002-1225 1066-1283

Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 1550 1550 1550 1550
Motor Pulley Pitch Diameter Low-Medium Static 3.1/4.1 4.9/5.9 5.4/6.6 4.9/5.9

Min/Max (in.) High Static 3.7/4.7 4.9/5.9 5.4/6.6 4.9/5.9
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.) Low-Medium Static 6.0 9.4 9.4 8.0

Nominal Fan Shaft Diameter (in.) 1
Belt, Quantity...Type...Length (in.) Low-Medium Static 1...BX...42 1...BX...50 1...BX...54 2...BX...50

Pulley Center Line Distance (in.) 13.5-15.5 13.3-14.8 14.6-15.4 14.6-15.4
Speed Change per Full Turn of

Movable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns

From Closed Position 6666
Factory Speed Pulley Setting 3.5 3.5 3.5 3.5
Factory Speed Setting (rpm) Low-Medium Static 1035 1002 1120 1182

FURNACE SECTION (Low Heat/High Heat)

Rollout Switch Cutout Temp (F)† 190 190 190 190

Burner Orifice Diameter (in. ...drill size)

Natural Gas
Thermostat Heat Anticipator Setting (amps)

208/230 v Stage 1 0.98 0.98 0.98 0.98

460 v Stage 1 0.80 0.80 0.80 0.80

Gas Input Stage 1 206,000/270,000 206,000/270,000 206,000/270,000 206,000/270,000

Efficiency (Steady State) (%) 81 81 81 81
Temperature Rise Range 15-45/20-50 15-45/20-50 15-45/20-50 15-45/20-50
Manifold Pressure (in. wg)

Natural Gas 3.3 3.3 3.3 3.3
Gas Valve Quantity 1111
Field Gas Connection Size (in.-FPT)

HIGH-PRESSURE SWITCH (psig)

Cutout 426
Reset (Auto) 320

LOW-PRESSURE SWITCH (psig)

Cutout 27
Reset (Auto) 44

FREEZE PROTECTION THERMOSTAT (F)

Opens 30 ± 5
Closes 45 ± 5

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity...Size (in.) 2...20 x 25 x 1

RETURN-AIR FILTERS Throwaway**

Quantity...Size (in.) 4...20 x 20 x 2

POWER EXHAUST

LEGEND

Bhp — Brake Horsepower
TXV — Thermostatic Expansion Valve

*Circuit 1 uses the lower portion of condenser coil and lower portion of evaporator coils;

and Circuit 2 uses the upper portion of both coils.

UNIT 579F 180 216 240 300

1

/2...1050

1...SM120

1...SR*782*AE

3

Aluminum Pre-Coated, or Copper Plate Fins

3

/8-in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face Split

/8-in. Copper Tubes, Aluminum Lanced,

1

/2...1050 1...1075 1...1075

1...SM120

1...SM110

8.7 [208/230 v]

9.5 [460 v]

1...SM161

1...SM120

10.2 [208/230 v]

11.8 [460 v]

High Static 1227-1550 1069-1287 1193-1458 1332-1550

7

/

8

High Static 5.2 8.0 7.9 6.4

3

/

16

11/

8

17/

16

13/

8

17/

16

13/

17/

High Static 1...BX...42 1...BX...48 1...BX...50 2...BX...47

Low-Medium Static 48 37 37 36
High Static 55 34 44 45

High Static 1389 1178 1328 1470

0.1285...30/

0.136...29

0.1285...30/

0.136...29

0.1285...30/

0.136...29

0.1285...30/

0.136...29

Stage 2 0.44 0.44 0.44 0.44

Stage 2 0.44 0.44 0.44 0.44

Stage 2 275,000/360,000 275,000/360,000 275,000/360,000 275,000/360,000

3

/

4

3

/

4

3

/

4

3

1...20 x 20 x 1

1

/2 Hp, 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v)

†Rollout switch is manual reset.

**The 579F300 units requires 2-in. industrial-grade filters capable of handling face veloc-

ities of up to 625 ft/min (such as American Air Filter no. 5700 or equivalent).

NOTE: The 579F180-300 units have a low-pressure switch (standard) located on the
suction side.

4...16 x 20 x 2

8

16

/

4

—7—

III. STEP 3 — FIELD FABRICATE DUCTWORK

Secure all ducts to building structure. Use flexible duct con­nectors between unit and ducts as required. Insulate and
weatherproof all external ductwork, joints, and roof openings
with counter flashing and m asti c i n acc ordance with applica­ble codes.

Ducts passing through a n unc ondit i one d spa ce must be insu­lated and covered with a vapor barrier.

IV. STEP 4 — MAKE UNIT DUCT CONNECTIONS

Unit is shipped for thru-the-bottom duct connections. Duct­work openings are shown in Fig. 1, 4, and 5. Duct connec­tions are shown in Fig. 6. Field-fabricated concentric
ductwork may be connected as shown in Fig. 7 and 8. Attach
all ductwork to roof curb and roof curb basepans.

V. STEP 5 — INSTALL FLUE HOOD AND WIND BAFFLE

Flue hood and wind baffle are shipped secured under main
control box. To install, secure flue hood to access panel. See
Fig. 9. The wind baffle is then installed over the flue hood.

NOTE: Whe n properly insta lled, flue hoo d will line up with
combustion fan housing. See Fig. 10.

VI. STEP 6 — TRAP CONDENSATE DRAIN

See Fig. 11 for drain location. One

3

/4-in. half coupling is pro­vided inside unit evaporator section for condensate drain
connection. An 8
diameter pipe nipple, coupled to standard

1

/2-in. x 3/4-in. diameter and 2-in. x 3/4-in.

3

/4-in. diameter
elbows, provide a straight path down through hole in unit
base rails (see Fig. 12). A trap at leas t 4-in. deep must be
used.

NOTE: Do not drill in this area; damage to basepan may result in water
leak.

Fig. 6 — Air Distribution — Thru-the-Bottom

NOTE: Dimensions A, A′, and B′ are obtained from field-supplied ceil-

ing diffuser.

Shaded area indicates block-off panels.

Fig. 8 — Concentric Duct Details

WIND
BAFFLE

NOTE: Do not drill in this area; damage to basepan may result in water
leak.

Fig. 7 — Concentric Duct Air Distribution

Fig. 9 — Flue Hood Location

—8—

INDUCED DRAFT
MOTOR

VII. STEP 7 — ORIFICE CHANGE

This unit is factory assembled for heating operation using
natural gas at an elevation from sea level to 2000 ft. This
unit uses orifice type LH32RFn nn, wher e “nnn” i ndicates th e
orifice size based on drill size diameter in thousands of an
inch.

A. High Elevation (Above 2000 ft)

Use accessory high altitude kit when installing this unit at
an elevation of 2000 to 7000 ft. For elevations above 7000 ft,
refer to Table 2 to identify the correct orifice size for the
elevation. See Table 3 for the nu mber of orifi ces re quired for
each unit size. Purc hase the se orifi ces f rom your lo cal Bryant
dealer. Fo llow in structions in ac cessory I nstallati on Ins truc­tions to install the correct orif ices.

Table 2 — Altitude Compensation*

COMBUSTION
FAN HOUSING

MAIN BURNER
SECTION

HEAT EXCHANGER
SECTION

Fig. 10 — Combustion Fan Housing Location

3/4" FPT DRAIN
CONNECTION

1-3/8"
DRAIN HOLE

Fig. 11 — Condensate Drain Details (579F180 Shown)

ELEVATION (ft)

0-1,999 30 29

2,000 30 29
3,000 31 30
4,000 31 30
5,000 31 30
6,000 31 30
7,000 32 31
8,000 32 31
9,000 33 31

10,000 35 32

*As the height above sea level increases, there is less oxygen per cubic

foot of air. Therefore, heat input rate should be reduced at higher alti­tudes. Includes a 4% input reduction per each 1000 ft.

†Orifices available through your Bryant dealer.

NATURAL GAS ORIFICE†

Low Heat High Heat

Table 3 — Orifice Quantity

UNIT ORIFICE QUANTITY
579F180 Low Heat 5
579F210 Low Heat,

579F240 Low Heat,
579F300 Low Heat,
579F180 High Heat

579F210 High Heat,
579F240 High Heat,
579F300 High Heat

6

7

B. Conversion To LP (Liquid Propane) Gas

Use accessory LP gas conversion kit when converting this unit
for use with LP fuel usage for elevations up to 7000 ft. For
elevations above 7000 ft, refer to Table 4 to identify the correct
orifice size for the elevation. See Table 3 for the number of
orifices required for each unit size. Purchase these orifices
from your local Bryant deale r. Follow instructions in acce ssory
Installation Instructions to install the correc t orific es.

Table 4 — LP Gas Conversion*

Fig. 12 — Condensate Drain Piping Details

ELEVATION (ft) LP GAS ORIFICE†

0-1,999 36

2,000 37
3,000 38
4,000 38
5,000 39
6,000 40
7,000 41
8,000 41
9,000 42

10,000 43

*As the height above sea level increases, there is less oxygen per

cubic foot of air. Therefore, heat input rate should be reduced at higher
altitudes. Includes a 4% input reduction per each 1000 ft.

†Orifices available through your Bryant dealer.

—9—

VIII. STEP 8 — INSTALL GAS PIPING

Unit is equipped for use with natural gas. Installation must
conform with local bu ilding codes or, in the absence of local
codes, with the National Fuel Gas Code, ANSI Z223.1.

Install field-supplied manual gas shutoff valve with a

1

/8-in. NPT pressure tap for test gage connection at unit.
Field gas piping must include sediment trap and union. See
Fig. 13.

WARNING: Do not pressure test gas supply while
connected to unit. Always disconnect union before
servicing.

IMPORTANT: Natural gas pressure at unit gas connection
must not be less than 5.5 in. wg or greater than 13.5 in. wg.

Size gas-supply piping for 0.5-in. wg maximum pressure
drop. Do not use supply pipe smaller than unit gas
connection.

Fig. 13 — Field Gas Piping

IX. STEP 9 — MAKE ELECTRICAL CONNECTIONS

A. Field Power Supply

Unit is factory wired for voltage sh own on nameplate.
When installing units, provide a disconnect per NEC

(National Electrical Code) of adequate size (see Table 5).
All field wiring must comply with NEC and local

requirements.
Route power ground lines through control box end panel or

unit basepan (see Fig. 4 and 5) to connections as shown on
unit wiring diagram and Fig. 14.

CAUTION: The correct power phasing is critical in
the operation of the scroll compressors. An incorrect
phasing will cause the compressor to rotate in the
wrong direction. This m ay lead to prematu re comp res­sor failure.

WARNING: The unit must be electrically
grounded in accordance with local codes and NEC
ANSI/NFPA 70 (National Fire Protection Association).

Field wiring must confirm to temperature limitations for
type “T” wire. All field wiring must comply with NEC and
local require ments.

Transformer no. 1 is wi r ed for 230 -v uni t. If 2 08/ 230-v unit is
to be run with 208-v power supply, the tran sformer must be
rewired as follows:

1. Remove cap from red (208 v) wire.

2. Remove cap from orange (230 v) spliced wire.

3. Replace orange wire with red wire.

4. Recap both wires.

IMPORTANT: BE CERTAIN UNUSED WIRES ARE
CAPPED. Failure to do so may damag e the transformers.

Operating voltage to compressor must be within voltage
range indicated on unit nameplate. On 3-phase units, volt­ages between phases must be balanced within 2%.

Unit failure as a res ult of ope ra tio n o n imp ro per line volt age
or excessive phase imbalance constitutes abuse and may
cause damage to electrical components.

B. Field Control Wiring

Install a Bryant-approved accessory thermostat assembly
according to installation instructions included with acces­sory. Locate thermostat assembly on a solid interior wall in
the conditioned space to sense average temperature.

Route thermostat cable or equivalent single leads of
colored wire from sub bas e t ermin als through conduit in unit
to low-voltage connection s as sho wn on unit la be l wi ring dia­gram and in Fig. 15.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C minimum). All
wire larger than no. 18 AWG cannot be directly connected a t
the thermos tat and wi ll req uire a j unction box and s plice a t
the thermostat.

Set heat anticipator settings as follows:

VOLTAGE W1 W2

208/230

460

0.98

0.80

0.44

0.44

Settings may be changed slightly to provide a greater degree
of comfort for a particular installation.

C. Optional Non-Fused Disconnect

On units with the optional non-fused disconnect, incoming
power will be wired into the disconnect switch. Refer to
Fig. 16 for wiring for 100 and 200 amp disconnect switches.
Units with an MOCP (maximum overcurrent protection)
under 100 will use the 100 amp disconnect switch. Units
with an MOCP over 100 will use the 200 amp disconnect
switch. Refer to the applicable disconnect wiring diagram.

To prevent breakage during shipping, the disconnect handle
and shaft are shipped and packaged inside the unit control
box. Install the disconnect handle before unit operation.
To install the handle and shaft, perform the following
procedure:

1. Open the co ntro l box door and remov e th e han d le a nd
shaft from shipping location.

2. Loosen the Allen bolt located on the disconnect
switch. The bolt is locat ed on the sq uare hole a nd is
used to hold the shaft in place. The shaft cannot be
inserted until the Allen bo lt is moved.

3. Insert the disconnect shaft into the square hole on
the disconnect switch. The end of the shaft is spe­cially cut and the shaft can only be inserted in the
correct orientation.

4. Tighten the Allen bolt to lock the shaft into position.

5. Close the control box door.

6. Attach the handle to the external access door with
the two screws provided. When the handle is in the
ON position, the handle will be vertical. When
the handle is in the OFF position, the handle will be
horizontal.

—10—

7. Turn the handle to the OFF position and close the
door. The handle should fit over th e end of the shaft
when the door is closed.

8. The handle must be in the OFF position to open the
control box door.

D. Optional Convenience Outlet

On units with optional convenience outlet, a 115-v GFI
(ground fault interrupt) convenience outlet receptacle is
provided for field wiring. Field wiring should be run through

7

the

/8-in. knockout provided i n the basepan ne ar the return

air opening.

LEGEND

EQUIP — Equipment
GND — Ground
NEC — National Electrical Code
TB — Terminal Block

NOTE: The maximum wire size for TB1 is 2/0.

Fig. 14 — Field Power Wiring Connections

THERMOSTAT ASSEMBLY

REMOVABLE JUMPER

RC

RH

R

RED

Y1 Y2

Y1

BLU

PNK

W1

W1Y2

ORN

W2

W2

VIO

GC

G

BLK

C

BRN

L

X

X

WHT

Fig. 15 — Field Control Thermostat Wiring

6T3 4T2 2T1 LOAD

X. STEP 10 — MAKE OUTDOOR-AIR INLET ADJUSTMENTS

A. Manual Outdoor-Air Damper

All units (except those equipped with a factory-installed
economizer) have a manual outdoor-air damper to provide
ventilation air.

Damper can be preset to admit up to 25% outdoor air into
return-air compartment. To adjust, loosen securing screws
and move damper to desired setting, then retighten screws
to secure damper (Fig. 17).

XI. STEP 11 — INSTALL OUTDOOR-AIR HOOD

The outdoor-air hood is common to 25% air ventilation and
EconoMi$erIV. If EconoMi$erIV is used, all electrical connec­tions have been made an d adjusted at th e factory. Assemble
and install hood in the field.

IMPORTANT: If the unit is equipped with the optional
EconoMi$erIV component, move the outdoor-air tempera­ture sensor prior to installing the outdoor-air hood. See the
Optional EconoMi$erIV section for more inform ation.

NOTE: The hood top panel, upper and lower filter retainers,
hood drain pan, baffle (size 300), and filter support bracket
are secured opposite the condenser end of the unit. The
screens, hood side panels, remaining section of filter support
bracket, seal strip, and hardware are in a package located
inside the return-air filter access panel (Fig. 18).

1. Attach seal strip to upper filter retainer. See Fig. 19.

2. Assemble hood top panel, side panels, upper filter
retainer, and drain pan (see Fig. 20).

3. Secure lower filter retainer and support bracket to
unit. See Fig. 20. Leave screws loose on size 300
units.

4. Slide baffle (size 300) behind lower filter retainer and
tighten screws.

5. Loosen sheet metal screws for top panel of base unit
located above o utdoor-air inlet opening, and remove
screws for hood side panels located on the sides of the
outdoor-air inlet opening.

6. Match notches in hood top panel to unit top panel
screws. Insert hood flange between top panel flange
and unit. Tighten screws.

7. Hold hood side panel flanges flat against unit, and
install screws removed in Step 5.

8. Insert outdoor-air inlet screens and spacer in channel
created by lower filter retainer and filter support
bracket.

NOTE: The disconnect takes the place of TB-1 as shown on the unit
wiring diagram label and the component arrangement label.

Fig. 16 — Optional Non-Fused Disconnect Wiring Fig. 17 — Standard 25% Outdoor-Air Section Details

5L3 3L2 1L1 LINE

—11—

Table 5 — Electrical Data

UNIT
579F

180

(15 Tons)

216

(18 Tons)

240

(20 Tons)

300

(25 Tons)

FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code, U.S.A.
OFM — Outdoor (Condenser) Fan Motor
RLA — Rated Load Amps

*Fuse or HACR circuit breaker.

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

NOMINAL
VOLTAGE

(3 Ph, 60 Hz)

208/230 187 253 25.6 190 25.6 190 3 0.5 1.7 3.7 10.5/11.0

460 414 508 13.5 95 13.5 95 3 0.5 0.8 3.7 4.8

208/230 187 253 33 237 23 184 3 0.5 1.7 5.0 15.8/15.8

460 414 508 16.2 130 10.2 90 3 0.5 0.8 5.0 7.9

208/230 187 253 33 237 29.5 237 2 1 6.6 7.5 25.0/25.0

460 414 508 16.2 130 14.1 130 2 1 3.3 7.5 13.0

208/230 187 253 47.5 265 33.0 237 2 1 6.6 10.0 28.0/28.0

460 414 508 22.9 145 16.2 130 2 1 3.3 10.0 14.6

greater than 2%.

of voltage imbalance.
% Voltage Imbalance

= 100 x

max voltage deviation from average voltage

VO LTAGE

RANGE

Min Max RLA LRA RLA LRA Qty Hp

LEGEND

Use the following formula to determine the percent

average voltage

COMPRESSOR

No. 1 No. 2

OFM IFM

FLA

Hp FLA FLA LRA FLA MCA MOCP*

(ea)

Example: Supply voltage is 460-3-60.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact the local electric utility company immediately.

POWER

EXHAUST

— — 0.57 74/74 90/ 90

4.6 18.8 0.57 78/79 100/100
— — 0.30 38 50

2.3 6.0 0.30 40 50
— — 0.57 85/85 110/110

4.6 18.8 0.57 90/90 110/110
— — 0.30 41 50

2.3 6.0 0.30 43 50
— — 0.57 109/109 125/125

4.6 18.8 0.57 114/114 125/125
— — 0.30 54 70

2.3 6.0 0.30 56 70
— — 0.57 134/134 175/175

4.6 18.8 0.57 135/135 175/175
— — 0.30 66 80

2.3 6.0 0.30 68 90

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

COMBUSTION

FAN MOTOR

452 + 464 + 455

3

1371

=

3

=

457

POWER
SUPPLY

7

457

= 1.53%

—12—

Fig. 18 — Outdoor-Air Hood Component Location

Fig. 19 — Seal Strip Location

BAFFLE (300 ONLY)

LOWER FILTER
RETAINER

FILTER SUPPORT
BRACKET

HOOD SIDE

HOOD TOP
PANEL

PANELS (2)

BAFFLE
(300
ONLY)

LOWER
FILTER
RETAINER

FILTER SUPPORT
BRACKET

XII. STEP 12 — INSTALL ALL ACCESSORIES

After all the factory-installed options have been adjusted,
install all field-instal led accessories. Refer to the accessory
installation instructions included with each accessory.

A. Motormaster® I Control Installation (579F180 and 216
Only)

Install Field-Fabricated Wind Baffles
Wind baffles must be field-fabricated for all units to ensure

proper cooling cycle operation at low ambient temperatures.
See Fig. 21 for baffle det ails. Use 20-gage, galva nized sheet
metal, or similar corrosion-resistant metal for baffles. Use
field-supplied screws to attach baffles to unit. Screws should

1

be

/4-in. diameter and 5/8-in. long. Drill required screw holes

for mounting baffles.

CAUTION: To avoid damage to the refrigerant
coils and electrical components, use recommended
screw sizes only. Use care when drilling holes.

Install Motormaster I Controls
Only one Motormaster I control is required per unit. The

Motormaster I control must be used in conjunction wi th the
Accessory 0° F Low Ambient Kit (purchased separately). The
Motormaster I device controls ou tdoor fan no. 1 while out­door fans no. 2 and 3 are sequenced off by the Accessory 0° F
Low Ambient Kit.

Accessory 0° F Low Ambient Kit

Install the Access ory 0° F Low Ambi ent Kit per instru ction
supplied with accessory.

Sensor Assembly

Install the sensor assembly in the location shown in Fig. 22.

Motor Mount

To ensure proper fan height, replace the existing motor
mount with the new motor mount provided with accessory.

Transformer (460-v Units Only)

On 460-v units, a transformer is required. The transformer
is provided with the accessory and must be field-installed.

Motormaster I Control

Recommended mounting location is on the inside of the
panel to the left of the control box. The control should be
mounted on th e i nside of th e pan el, ver ticall y, with leads p ro­truding from bottom of extrusion.

B. Motormaster® V Control Installation

Install Field-Fabricated Wind Baffles
Wind baffles must be field-fabricated for all units to ensure

proper cooling cycle operation at low ambient temperatures.
See Fig. 21 for baffle det ails. Use 20-gage, galva nized sheet
metal, or similar corrosion-resistant metal for baffles. Use
field-supplied screws to attach baffles to unit. Screws should

1

be

/4-in. diameter and 5/8-in. long. Drill required screw holes

for mounting baffles.

CAUTION: To avoid damage to the refrigerant
coils and electrical components, use recommended
screw sizes only. Use care when drilling holes.

UPPER FILTER RETAINER

Fig. 20 — Outdoor-Air Hood Details

HOOD DRAIN PAN

—13—

NOTE: Dimensions in ( ) are in mm.

Fig. 21 — Wind Baffle Details

Install Motormaster V Controls
The Motormaster V control is a motor speed control device

which adjusts condenser fan motor speed in response to
declining liquid refrigerant pressure. A properly applied
Motormaster V control extends the operating range of air­condition ing systems and permits operation at lower outdoor
ambient temperatures.

The minimum ambient temperatures at which the unit will
operate are:

Standard Unit Unit with Low Ambient Kit Unit with MMV Control

40 25 –20

TEMPERATURE OPERATING LIMITS — F°

To operate down to the ambient temperatures listed,
Motormaster V controls (Fig. 23) must be added. Field­fabricated and installed wind baffles are also r equired for all
units (see Fig. 21). The Motormaster V control permits opera­tion of the unit to an ambient temperature of –20 F. The control
regulates the speed of 3-phase fan motors that are compatible
with the control. These motors are factory installed.

See Table 6 for the Motormaster V control accessory package
usage. Table 7 shows applicable voltages and motors.
Replacement of a motor IS NOT REQUIRED ON CUR-
RENT PRODUCTION UNITS since the control is co mpati­ble with the factory-installed fan motors. Only field wiring
control is required.

Install the Motormast er V control per instru ctions supplied
with accessory .

Table 6 — Motormaster V Control Package Usage

UNIT VOLTAGE ITEM DESCRIPTION

579F180-300

208/230 CRLOWAMB015A00

460 CRLOWAMB016A00

SENSOR
LOCATION

HAIRPIN END

NOTE: All sensors are located on the eighth hairpin up from the
bottom.

579F180 579F216

SENSOR
LOCATION

HAIRPIN END

Fig. 22 — Motormaster® I Sensor Locations

Table 7 — Applicable Voltages and Motors

VOLTAGE C OM PATIBL E MOTOR

208/230-3-60 HD52AK654

460-3-60 HD52AK654

XIII. STEP 13 — ADJUST FACTORY-INSTALLED OPTIONS

A. Optional EconoMi$erIV

See Fig. 24 and 25 for EconoMi$erIV component locations.
NOTE: These instructions are for installing the optional

EconoMi$erIV only. Refer to the accessory EconoMi$erIV
installation instructions when field installing an EconoMi$erIV
accessory.

To complete installation of t he optional EconoMi$erIV, per­form the following procedure.

1. Remove the EconoMi $erIV hood. Ref er to Step 11 —
Install Outdoor-Air Hood on page 11 for info rmation
on removing and in stalling the outdoor-air hood.

2. Relocate outdoor air temperature sensor from ship­ping position to operation pos ition on EconoMi $erIV.
See Fig. 24.

IMPORTANT: Failure to relocate the sensor w ill res ult in the
EconoMi$erIV not operating properly.

3. Re-install economizer hood.

4. Install all EconoMi$erIV accessories. EconoMi$erIV
wiring is shown in Fig. 26.

Outdoor air leakage is shown in Table 8. Return air pressure
drop is shown in Tabl e 9.

—14—

FROM FUSE BLOCK

Table 8 — Outdoor Air Damper Leakage

BLK

YEL

BLU

B

13B

13C

12 13A

2

256

TO PRESSURE
TRANSDUCER

2

3

1

TO MOTOR(S)

Fig. 23 — Motormaster® V Control

OUTDOOR AIR
TEMPERATURE SENSOR
(INSTALLED OPERATION
POSITION)

SCREWS

ECONOMI$ERIV

FRAME

TOP

SCREWS

LOW TEMPERATURE
COMPRESSOR
LOCKOUT SWITCH

Fig. 24 — EconoMi$erIV Component Locations —

End View

SUPPLY AIR
TEMPERATURE SENSOR
LOCATION

ECONOMI$ERIV

ACTUATOR

CONTROLLER

FLANGE
AND SCREWS
(HIDDEN)

1
R

T

R
T

c

a
V
4
2

M

O
C

4

2

_

c
a
V

T

O

H

H

X
E

+

t
e

S

V
0

2

1
V
2

1

1

N

5

N

n

H

i

X

M

E

s
o

P

4

1

n

P

e

p

P

O

3

V
C

1

D

x

F

a

1

E

T

M

T

V
0

F

1

E

V
2

V
C

D

V

t

C

e

D

S

V

1

0

Q

1

A

Q
A

V

2

+

e

O

e
r

S

C

F

l
o

O

o

S

C

B

D

+
R
S

A

R

S

DAMPER STATIC PRESSURE (in. wg)

0.2 0.4 0.6 0.8 1.0 1.2

LEAKAGE (cfm) 35 53 65 75 90 102

Table 9 — Return Air Pressure Drop (in. wg)

CFM

4500 5000 5400 6000 7200 7500 9000 10,000 11,250

0.040 0.050 0.060 0.070 0.090 0.100 0.110 0.120 0.140

B. EconoMi$erIV Standard Sensors

Outdoor Air Temperature (OAT) Sensor
The outdoor air temperature sensor (HH57AC074) is a 10 to

20 mA device used to measure the outdoor-air temperature.
The outdoor-air temperat ure is used t o determine whe n the
EconoMi$erIV can be used for free cooling. The sensor must
be field-reloca ted. See Fig. 24. The operati ng range of tem­perature measurement is 40 to 100 F.

Supply Air Temperature (SAT) Sensor
The supply air temperature sensor is a 3 K thermistor

located at the inlet of the indoor fan. See Fig. 25. This sensor
is factory installed. The operating range of temperature
measurement is 0° to 158 F. See Tabl e 10 for sensor temper a­ture/resistance values.

The temperature sensor looks like an eyele t terminal with
wires running to it. The sensor is located in the “crimp end”
and is sealed from moisture.

Low Temperature Compressor Lockout Switch
The EconoMi$erIV is equipped with an ambient tempera-

ture lockout switch located in the outdoor airstream which is
used to lock out the compressors below a 42 F ambient tem­perature. See Fig. 24.

Table 10 — Supply Air Sensor Temperature/

Resistance Values

TEMPERATURE (F) RESISTANCE (ohms)

–58 200,250
–40 100,680
–22 53,010

–4 29,091
14 16,590
32 9,795
50 5,970
68 3,747
77 3,000

86 2,416
104 1,597
122 1,080
140 746
158 525
176 376
185 321
194 274
212 203
230 153
248 116
257 102
266 89
284 70
302 55

Fig. 25 — EconoMi$erIV Assembled in Unit —

Side View

—15—