Bryant 581A User Manual

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installation, start-up and service instructions

SINGLE PA CKA GE RO OFT OP ELECTRIC COOLING/GAS HEATING UNITS

CONTENTS

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

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

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

III. Step 3 — Field Fabricate Ductwork. . . . . . . . . . .7

IV. Step 4 — Make Unit Duct Connections . . . . . . .7

V. Step 5 — Install Flue Hood and Wind

Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

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

VII. Step 7 — Install Gas Piping. . . . . . . . . . . . . . . . .8

VIII. Step 8 — Make Electrical Connections . . . . . . .8

IX. Step 9 — Make Outdoor-Air Inl et

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

X. Step 10 — Install Outdoor -Air Hood . . . . . . . . .11

XI. Step 11 — Install All Accessories. . . . . . . . . . .13

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-25

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-34

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . 35-37

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

Page

581A

Sizes 155-240

Cancels: II 581A-155-2 II 581A-155-3

6/15/99

WARNING:

1. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Refer to the User’s Information Manual provided with this unit for more details.

2. Do not store or use gasoline or other flammable vapor s and l iq uids in t he vici nity of this or a ny other appliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any phone in your buildi ng.

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.

SAFETY CONSIDERATIONS

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

Untrained personnel can perform the basic maintenance functions of cleaning coils and filters and replacing filters. All ot he r oper ati ons s hou ld be pe rfor med by tr ain ed se rvi ce personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all sa fe ty codes. Wear safet y gl a sse s an d w o rk g lov e s. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.

WARNING: Before performing service or maintenance operations on unit, turn off mail power s wi tch to unit. electrical shock cou l d cause personal inju ry.

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 greater than 0.5 psig, it must be replaced before use. When pressure testing fieldsupplied gas piping at pre ssures of 0.5 ps ig 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 res et will be required to resta r t th e compre ss o r.

INSTALLATION I. STEP 1 — PROVIDE UNIT SUPPORT A. Roof Curb

Assemble or install accessory roof curb or horizontal supply 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 supply roof curb before unit is set in place.

(Instructions continued on page 3.)

—2—

PKG. NO. REF.

CRRFCURB010A00

CRRFCURB011A00

CRRFCURB012A00

CURB

HEIGHT

ft-in. (mm)

1-2

(305)

2-0

(610)

2-0

(610)

DESCRIPTION

Standard Curb

14” High

Standard Curb

for Units

Requiring High

Installation

Side Supply

and Return

Curb for High

Installation

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1 in. thick neoprene coated 1

3. Dimensions in ( ) are in millimeters.

/2 lb density.

4. Direction of airflow.

5. Roof curb: 16 ga. (VA03-56) stl. To pre vent the hazard of stagnant water build-up in the drain

NOTE:

pan of the indoor section, unit can only be pitched as shown.

Dimensions (degrees and inches)

UNIT

ALL

DEG.IN.DEG.IN.

.28 .45 .28 .43

Fig. 1 — Roof Curb Details

For preassembled horizontal adapter roof curb part no.

NOTE:

(CRRFCURB013A00), the accessor y kit includes a factory-designed, high-static, regain transition duct. For horizontal curb part no. CRRFCURB012A00, a field-supplied transition duct is required.

Fig. 2 — Horizontal Adapter Roof Curbs

and Roof Curbs

IMPORTANT: Curb or adapt er roof cur b must be lev el. Th is is

necessary to per mit unit drain to function properly. Unit leveling tolerance is ±

/16 in. per linear ft in any direction. Refer to Accessory Roof Curb or Horizontal Supply Roof Curb Installation Instructions for additional information as required.

When accessory roof curb or horizontal supply roof curb is used, unit may be installed on class A, B, or C roof covering material.

IMPORTANT: The gasketing of the unit 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 a curb or adapter 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 tran sportat i on agency.

Do not drop unit; keep upright. Spreader bars are not required if top crating is left on unit. Use spreader bars over unit to prev ent sling or cabl e damage. Rollers may be used to move unit across a roof. Level by usi n g unit frame as a reference; lev eling toler a n ce is ±

/16 in. per linear ft in any direction. 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 ri ggi ng inst ruct ions on unit.

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 location. Do not locate air inlets near exhaust vents or other sources of contaminated air. For proper unit operation, ade quate combustion a nd 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 building, and at least 4 ft from any adjacent building. When unit is located adjacent to public walkways, flue assembly must be at leas t 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.

UNIT 581A

155 180 240

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 inser ting hook s in to uni t ba se rails as show n. Use c or n er pos t from packaging to protect coil from damag e. Use bumper boards for spreader bars on all units.

5. Weights do not include opti onal economi zer. Add 110 lb (50 kg) for econo mizer weight.

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

7. Add 75 lb (34 kg) for crating on 581A155 and 180 units. Add 135 lb (61 kg) for crating on 581A240 units.

8. Add 150 lb (68 kg) for copper condens er coi l. Add 280 lb (127 kg ) for copper condenser and evaporator coils.

CAUTION:

MAXIMUM SHIPPING

WEIGHT

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

1725 782 6-11 1800 816 6-11 1900 862 6-11

All panels must be in place when rigging.

DIMENSIONS

2121 4-0 1219 2121 3-2 964 2121 3-4 1016

Fig. 3 — Rigging Details

—3—

—4—

STD UNIT

UNIT

WEIGHT

581A

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-in. mm ft-in. mm

155 1725 782 110 50 427 194 390 177 438 199 470 213 3-3 991 3-5 1051 1-10 559 180 1800 816 110 50 417 189 399 181 481 218 503 228 3-2 961 3-6 1070 1-10 559

ECONO-

MIZER

WEIGHT

CORNERACORNERBCORNERCCORNER

NOTES:

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in ( ) are in millimeters.

DIM A DIM B DIM C

3. Center of Gravity.

4. Direction of airflow.

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

6. Minimum clearance:

• Rear: 7 ft- 0 in. (2134) for coil removal. This dim ension can be reduced to 4 ft-0 in. (1219) if conditions permit coil removal from the top.

• 4 ft-0 in. (1219) to combustible surfaces, all four sides (includes between units).

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

• Front: 4 ft-0 in. (1219) for control box access.

• Right side: 4 ft-0 in. (1219) for proper operation of damper and power exhaust if so equipped.

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

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

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

• Control box side: 3 ft-6 in. (1067) to block or concrete walls, or other grounded surfaces.

POWER EXHAUST/ BAROMETRIC RELIEF (ACCESSORY ONLY)

• Local codes or jurisdiction may prevail.

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

power exhaust as stated in Note no. 6, a removable fence or barricade requires no clearance.

8. Dimensions are from outsi de of corner post. Allow 0 ft-

side for top cover drip edge.

/16 in. (8) on each

581A180 ONLY

Fig. 4 — Base Unit Dimensions; 581A155 and 180

POWER EXHAUST/

BAROMETRIC RELIEF

(ACCESSORY ONLY)

FIELD SUPPLIED

—5—

UNIT STD. UNIT WEIGHT

581A240

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:

• Rear: 7 ft-0 in. (2134) for coil removal. This dimensio n can be reduced to 4 ft-0 in. (1219) if conditions permit coil removal from the top.

• 4 ft-0 in. (1219) to combustible surfaces, all four sides (includes between units).

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

• Front: 4 ft-0 in. (1219) for control box access.

• Right side: 4 ft-0 in. (1219) for proper operation of damper and power exhaust if so equipped.

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

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

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

• Control box side: 3 ft-6 in. (1067) to block or concrete walls, or other grounded surfaces.

• Local codes or jurisdiction may prevail.

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

exhaust as stated in Note no. 6, a removable fence or barricade requires no clearance.

8. Dimensions are fr om outside of cor ner post. Allow 0 ft -

side for top cover drip edge.

1900 lbs (862 kg) 110 lbs (50 kg)

ECONOMIZER

WEIGHT

/16 in. (8) on each

Fig. 5 — Base Unit Dimensions; 581A240

T able 1 — Physical Data

UNIT 581A 155 180 240 NOMINAL CAPACITY (tons)

OPERATING WEIGHT (lb)

Unit

Al/Al* Al/Cu*

Cu/Cu* Economizer Roof Curb†

COMPRESSOR

Quantity Number of Refrigerant Circuits Crankcase Heater Watts Oil (oz) (Ckt 1, Ckt 2)

REFRIGERANT TYPE

Expansion Device Operating Charge (lb oz)

Circuit 1**

Circuit 2

CONDENSER COIL Rows...Fins/in.

Total Face Area (sq ft)

CONDENSER FAN

Nominal Cfm Quantity...Diameter (in.) Motor Hp...Rpm Watts Input (Total)

EVAPORATOR COIL

Rows...Fins/in. Total Face Area (sq ft)

EVAPORATOR FAN

Quantity...Size (in.) Type Drive Nominal Cfm Std Motor Hp Opt Motor Hp Motor Nominal Rpm

Std Maximum Continuous Bhp Opt Maximum Continuous Bhp

Motor Frame Size Fan Rpm Range Low-Medium Static

Motor Bearing Type Maximum Allowable Rpm Motor Pulley Pitch Dia. Low-Medium Static

Nominal Motor Shaft Diameter (in.) Fan Pulley Pitch Diameter (in.) Low-Medium Static

Nominal Fan Shaft Diameter (in.) Belt, Quantity...Type... Length (in.) Low-Medium Static

Pulley Center Line Distance (in.) Speed Change per Full Turn of

Movable Pulley Flange (Rpm)

Movable Pulley Maximum

Full Turns From Closed Position Factory Speed Factory Speed Setting (Rpm) Low-Medium Static

FURNACE SECTION

Rollout Switch Cutout Temp (F) ll Burner Orifice Diameter (in...drill size)

Natural Gas

Thermostat Heat Anticipator Setting

Stage 1 (amps) Stage 2 (amps)

Gas Input (Btuh)Stage 1 Efficiency (Steady State) (%)

Temperature Rise Range Manifold Pressure (in. wg)

Natural Gas Gas Valve Quantity GasValvePressure Range (in. wg)

Stage 2

(psig)

High Static

Low-Medium Static

High Static

0.98 0.8 0.98 0.8 0.98 0.8

0.44 0.44 0.44 0.44 0.44 0.44

Field Gas C onnection Size (in.-FPT)

HIGH-PRESSURE SWITCH (psig)

Cutout Reset (Auto.)

LOW-PRESSURE SWITCH (psig)

Cutout Reset (Auto.)

FREEZE PROTECTION THERMOSTAT (F)

Opens Closes

OUTDOOR-AIR INLET SCREENS

Quantity...Size (in.)

RETURN-AIR FILTERS Quantity...Size (in.)

LEGEND

Al — Bhp — Cu — TXV —

Aluminum Brake Horsepower Copper Thermostatic Expansion Valve

12 15 20

1725 1800 1900 1875 1950 2050 2005 2080 2180

110 110 110 200 200 200

22 2 22 2

70 70 70

60,66 85,60 110,110

20.7 19.5 18.5

11.9 13.45 13.3

Cross-Hatched

/2...1050

2...10 X 10 2...12 x 12 2...12 x 12

4...15 4...15 4...15

10,500 10,500 14,200

3...22 3...22 2...30

/8-in. Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins

21.7 21.7 21.7

1100 1100 3400

Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face Split

4...15 4...15 4...15

17.5 17.5 17.5

Belt Belt Belt

5200 6000 8000

2.9 5 7.5

3.7

1725 1745 1745

R-22 TXV

Propeller Type

/2...1050 1...1075

Centrifugal Type

3.13 6.13 9.47 (208 v)

4.38 56H 184T 213T

834-1064 873-1021 1002-1151

1161-1426 1025-1200 1193-1369

Ball Ball Ball

1550 1550 1550

3.1/4.1 4.9/5.9 5.4/6.6

3.7/4.7 4.9/5.9 5.4/6.6

6.0 9.4 9.4

5.2 8.0 7.9

1...BX...42 1...BX...50 1...BX...54

1...BX...42 1...BX...48 1...B X...50

13.5-15.5 13.3-14.8 14.6-15.4

11/

17/

58 37 37 67 44 44

4†† 4†† 4††

3.5 3.5 3.5 978 965 1095

1327 1134 1303

190 190 190

0.1285...30/ 0.136...29 0.1285...30/ 0.136...29 0.1285...30/ 0.136...29

172,000/230,000 206,000/275,000 206,000/275,000 225,000/300,000 270,000/360,000 270,000/360,000

81 81 81

15-45/30-60 15-45/20-50 15-45/20-50

3.3 3.3 3.3

11 1

5.5-13.5 5.5-13.5 5.5-13.5

.235-.487 .235-.487 .235-.487

*Evaporator coil fin material/condenser coil fin material. †Weight of 14-in. roof curb.

**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.

††Pulley has 6 turns. Due to belt and pulley, moveable pulley cannot be set to 0 to 1 turns open.

llRollout switch is manual reset.

426 320

27 44

30 ± 5 45 ± 5

Cleanable

2...20 x 25 x 1

1...20 x 20 x 1 Throwaway

4...20 x 20 x 2

4...16 x 20 x 2

(230 and 460 v)

13/

17/

10.33

—6—

III. STEP 3 — FIELD FABRICATE DUCTWORK

On vertical units, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. Use flexible duct connectors between unit and ducts as required. Adequately insulate and weatherproof all ductwork located outdoors, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Insulate ducts passing through unconditioned space, and use vapor barrier in accordance wit h the latest issue of SMACNA (Sheet Meta l and Air Conditioning Contractors National Association) and ACCA (Air Conditioning Contractors of America) minimum installation standards for heating and air conditioning systems.

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

A minimum clearance to combustibles of 1 in. for the first 24 in. of ductwork is required for all units with electric heat. Cabinet return-air static shall not exceed –0.35 in. wg with economizer or –0.45 in. wg without economizer.

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. Refer to installation instructions shipped with accessory roof curb for more information.

WARNING: For vertical supply and return units, tools or parts coul d drop into ductwork a nd cause an injury. Install a 90 degree turn in the return ductwork between the unit and the conditioned space. If a 90 degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space.

V. STEP 5 — INSTALL FLUE HOOD AND WIND BAFFLE

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

NOTE: When properly installed, flue hood will line up with combustion fan housing. See Fig. 10.

Do not drill in this area; damage to basepan may result in water

NOTE:

leak.

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

(581A180, 240 Unit Shown)

Do not drill in this area; damage to basepan may result in water

NOTE:

leak.

Fig. 7 — Concentric Duct Air Distribution

(581A180, 240 Unit Shown)

Dimensions A, A’, B and

NOTE:

B’ are obtained from field-supplied ceiling diffuser. Shaded areas indicate block-off pans.

Fig. 8 — Concentric Duct Details

INLET

WIND BAFFLE

LOUVERS

FLUE SCREEN

Fig. 9 — Flue Hood Location

—7—

INDUCED DRAFT

3/4" FPT DRAIN CONNECTION

1-3/8" DRAIN HOLE

INDOOR MOTOR ACCESS

FILTER ACCESS

MOTOR

All field wiring must comply with NEC and local requirements. Insulate low-voltage wires for highest voltage contained within condui t when low-volta ge control wir es are run in the same conduit as high-voltage wires .

COMBUSTION FAN HOUSING

MAIN BURNER SECTION

HEAT EXCHANGER SECTION

Fig. 10 — Combustion Fan Housing Location

VI. STEP 6 — TRAP CONDENSATE DRAIN

See Fig. 4, 5, and 11 fore drain location. Plug is provided in drain hole and must be removed when unit is operating. One

/4 in. half coupling is provided inside unit evaporat or section for condensate drain connection. An 8 nipple and a 2 in. x standard

/4 in. diameter elbow to provide a straight path

/4 in. diamet er pi pe ni ppl e are co uple d to

/2 in. x 3/4 in. diameter

down through holes in unit base rails (see Fig. 11 and 12). A trap at least 4 inc hes deep must be used.

VII. STEP 7 — INSTALL GAS PIPING

The gas supply pipe enters the unit through the 1 diameter knockout provided. The gas connection to the unit is made to th e

/4 in. FPT gas inlet on the gas manifold. Unit

/2 in.

is equipped for use with natural gas. Installation must conform with local building codes or, in the absence of local codes, wi th the National Fuel Gas code, ANSI Z223.1.

Install field-supplied manual gas shutoff valve with a

/8 in. NPT pressure tap for test gage connection at unit. Field gas piping must include sediment trap and union. See Fig. 13. Install sedim ent trap in riser leading to heating section. This drip leg functions as a trap for dirt and condensate. Install trap where condensate cannot freeze. Install this sediment trap b y connecti ng a piping tee to riser lead ing to he ating section, so that straight-through section of tee is vertical. Then, connect capped n ipple in to lower end of t ee. Extend capped nipple below level of gas contr ols.

Fig. 11 — Condensate Drain Details

(581A155 Shown)

Fig. 12 — Condensate Drain Piping Detai ls

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.

VIII. STEP 8 — MAKE ELECTRICAL CONNECTIONS A. Field Power Supply

Unit is factory wired for voltage shown on unit nam epl ate. When installing units, provide a disconnect per NEC

(National Electrical Code) requirements of adequate size (Table 2).

Fig. 13 — Field Gas Piping

—8—

Route power and ground lines through control box end panel or unit basepa n (s ee Fig. 4 and 5) to connections as shown on unit wiring diag ram 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 may lead to premature compressor 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 conform to temperature limitations for type “T” wire. All field wiring must comply with NEC and local requirements.

Transformer no. 1 is wired for 230-v unit. If 208/230-v unit is to be run with 208-v power supply, the transformer must be rewired as follows:

1. Remove cap from red ( 208 v ) wi re.

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

3. Replace oran ge wir e wi th red wire.

4. Recap both wires.

IMPORTANT: BE CERTAIN UNUSED WIRES ARE CAPPED. Failure to do so may damage 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 result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any warrant y.

B. Field Control Wiring

The unit must have a separate electrical service with a fieldsupplied , w at e rp ro o f, fuse d di sconnect sw i tc h mou nted at, or within sight fr o m , th e unit. R ef e r to the u n i t r a ti n g plate fo r maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing. Be sure disconnect switch does not obst ruct unit rating plate.

The field-supplied disconnect switchbox may be mounted on the unit over the high-voltage inlet hole in the control corner panel.

Connect ground lead to chassis ground connection when using separate ground wire. The unit has a terminal block for fie l d power connect ions. Inst all conduit conne ctors in side panel power supply knockout openings indicated in Fig. 4 and 5. Route power lines through connector to unit control box.

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

Route thermostat cable or equivalent single leads of colored wire from subbase terminals through conduit in unit to lowvoltage connections as shown on unit label wiring 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 AW G insulated wire (35 C Minimum).

All wire larger than no. 18 AWG cannot be directly connected at the thermostat and will require a junction box and splice at the thermostat.

Set heat antic i pator settings as follows:

VOLT AGE W1 W2

208/230

460

0.98 0.44

0.80 0.44

The room thermostat heat anticipator must be properly adjusted to ensure proper heating performance. Set the heat anticipator to settings based on the table above, by using an ammeter to determine the exact setting for stages 1 and 2. Failure to make a proper heat anticipator adjustment may result in improper operation, discomfort to the occupants of the conditioned space, and inefficient energy utilization; however, the required setting m ay be changed slightly to provide a greater de gr ee of comfort for a particular installation.

Refer to Accessory Remote Control Panel instructions if required.

STEP 9 — 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. Retighten screws to secure damper (Fig. 16).

B. Optional Economizer

Economizer Mot or C ontrol Module (See Fig . 17-19) The economizer control location is shown Fig. 17. For maxi-

mum benefit of outdoor air, set economizer motor control module to the “D” setting (Fig. 18). The economizer motor control module is located on the economizer motor. See Fig. 19.

The maximum wire size for TB1 is 2/0.

NOTE:

EQUIP — GND — NEC — TB —

LEGEND

Equipment Ground National Electrical Code T erminal Board

Fig. 14 — Field Power Wiring Connections

Fig. 15 — Field Control Therm ostat Wiring

—9—

Table 2 — Electrical Data

NOMINAL

UNIT

VOLTAGE

581A

(Standard

(Optional

LEGEND FLA —

HACR — IFM —

LRA — MCA — MOCP — NEC — OFM — RLA —

*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.

Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%.

the following formula to determine the percent voltage imbalance.

% Voltage Imbalance

= 100 x

(3 Ph, 60

Hz)

208/230 187 253 20.7 156 19.3 123 3 0.5 1.7 2.9

015

IFM)

015

IFM)

017

025

460 414 508 10 70 10 62 3 0.5 0.8 2.9 4.2

208/230 187 253 20.7 156 19.3 123 3 0.5 1.7 3.7

460 414 508 10 70 10 62 3 0.5 0.8 3.7 4.8

208/230 187 253 32.1 195 20.7 156 3 0.5 1.7 5.0

460 414 508 16.4 95 10 70 3 0.5 0.8 5.0 7.9

208/230 187 253 42 239 33.6 225 2 1 6.6 7.5

460 414 508 19.2 125 17.3 114 2 1 3.3 7.5 13.0

Full Load Amps Heating, Air Conditioning and Refrigeration Indoor (Evaporator) Fan Motor Locked Rotor Amps Minimum Circuit Amps Maximum Overcurrent Protection National Electrical Code Outdoor (Condenser) Fan Motor Rated Load Amps

max voltage deviation from average voltage average voltage

VOLTAGE

RANGE

Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA FLA MCA MOCP*

COMPRESSOR

No. 1 No. 2

Use

7 457

POWER

EXHAUST

—

2.3—6.0

—

2.3—6.0

—

2.3—6.0

—

2.3—6.0

OFM IFM

8.8/

8.4—4.6—18.8

11.0/

10.5—4.6—18.8

15.8/

15.8—4.6—18.8

25.0/

25.0—4.6—18.8

EXAMPLE: Supply voltage is 460-3-60.

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

Average Voltage =

= 457 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 voltage imbalance.

% Voltage Imbalance = 100 x

= 1.53% This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT:

utility company immediately.

452 + 464 + 455 3

1371 3

If the supply voltage phase imbalance is more than 2%, contact y our local electric

COMBUSTION

FAN MOTOR

0.57

0.30

0.57

0.30

0.57

0.30

0.57

0.30

59/59 64/63

29 31

61/61 66/65

30 32

82/82 86/86

41 43

124/124 129/129

61 63

POWER

SUPPLY

110/110 110/110

150/150 150/150

70/70 80/80

35 40

80/80 80/80

35 40

50 50

80 80

—10—

Fig. 16 — 25% Outdoor-Air Sect ion Details

Fig. 17 — Economizer Damper Assembl y-End View

Fig. 19 — Economizer Motor Control

Module Location

Damper Vent Position Setting

1. Set fan switch at ON position (continuous fan operation) and close night switch if used.

2. Set system selecto r swit ch at OFF position.

3. Turn damper adjustment knob located on control module clockwise slowly until dampers assume desired v e n t p os iti on. Do not manually operate econo-

mizer motor, since damage to motor will res ult.

X. STEP 10 — INSTALL OUTDOOR-AIR HOOD

The outdoor-air hood is common to 25% air ventilation and econ omizer. If eco nomizer is used , all elec trica l connec tions have been made and adjusted at the factory. Assemble and install hood in the field.

NOTE: The hood top panel, upper and lower filter retainers, hood drain pan, baffle (sizes 180 and 240), 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 other hardware are in a package located inside the return-air filter access panel (Fig. 20).

1. Attach seal strip to upper filter retainer. See Fig. 21.

2. Assemble hood top panel, side panels, upper filter retainer, and drain pan (see Fig. 22 ).

LEGEND

LED —

Light- Emitti ng Diode

Fig. 18 — Economizer Motor Control Mod ule

(Part Number W7459A)

Fig. 20 — Outdoor-Air Hood Component Locati on

—11—

3. Secure lower filter retainer and long section of filter support bracket to unit. See Fig. 22. Leave screws loose on 180 and 240 units.

4. Slide baffle (sizes 180 and 240) behind lower filter retainer and tighten screws.

5. Loosen sheet metal screws for top panel of base unitlocated above outdoor-air inlet opening, and remove screws for hood side panels locat ed on the sides of the outdoor-air inlet opening.

6. Match notches in hood top panel with 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.

Fig. 21 — Seal Strip Location

BAFFLE (180 AND 240 SIZES ONLY)

LOWER FILTER RETAINER

FILTER SUPPORT BRACKET

8. Insert outd oor-air inlet screens and spacer i n channel created by lower filter retainer and filter support bracket.

9. Attach remaining short section of filter support bracket.

A. Enthalpy Control Installation NOTE: The accessory outdoor-air enthalpy sensor must be

installed BEF OR E th e economizer hoods ar e installed on the unit or hoods will have to be removed.

1. Remove and discard the factory-installed jumper assembly containing the 800-ohm resistor on the economizer control module (between terminals S and +). See Fig. 18.

2. Remove black wire assembly containing the 620-ohm resistor from between economizer control module terminal S

and the outdoor-air thermostat (O A T ). Place

this wire assembly (containing the 620-ohm resistor) between economizer control module terminals S

and

+, replacing the jumper removed in Step 1. See Fig. 18.

3. Disconnect the blue wire from the OAT.

4. Remove OAT from the outside of the economizer. See Fig. 17.

5. Mount the enthalpy sensor (Fig. 23) to the economizer on the outside of the unit (in the same location from which the OAT was removed) using the 2 screws provided. See Fig. 17.

6. Reconnect the blue wire removed in Step 3 to the enthalpy sen sor terminal +.

7. Cut the violet wire provided to desired length and terminate with quick-connect terminal provided. Route the violet wire from the enthalpy sensor terminal S, through the snap bushing, and to the economizer control module terminal S

. See Fig. 18.

8. Set changeover set point to the desired location. See Fig. 24.

NOTE: For maximum benefit of outdoor air, set the enthalpy control to the “A” setting. At this setting, when the relative humidity is 50% and the outdoor air is below 74 F, the relay contacts on the sens or will be closed.

9. Reinstall economizer hoods if removed.

IMPORTANT: Be sure all seal strips and RTV sealant are intact. A watertight seal to inside of unit must be maintained.

HOOD SIDE

HOOD TOP PANEL

HOOD DRAIN PAN

UPPER FILTER RETAINER

The outdoor air hood comes with a baffle which is used on

NOTE:

sizes 180 and 240 only. Discard baffle for size 155 units.

PANELS (2)

FILTER SUPPORT BRACKET

Fig. 22 — Outdoor-Air Hood Details

BAFFLE (180 AND 240 ONLY)

LOWER FILTER RETAINER

Fig. 23 — Outdoor-Air and Return-Air

Enthalpy Sensor

—12—

CONTROL

CURVE

RH —

A B C D

CONTROL

POINT

(Appro x Deg)

AT 50% RH

73 68 63 58

Relative Humidity

Fig. 24 — Psychrometric Chart for Solid-State

Enth a lpy Control

B. Differential Enthalpy Control NOTE: The accessory outdoor-air enthalpy sensor must be

installed BEF OR E the economizer hoods are installed on the unit or hoods will have to be removed.

1. Remove and discard the factory-installed jumper assembly containing the 800-ohm resistor on the economizer control module (between terminals S and +). See Fig. 18.

2. Disconnect black wire from economizer control module terminal S

and blue wire from the OAT (outdoor -

air thermostat).

3. Remove OAT and black wire assembly containing the 620-ohm resistor from the outside of the economizer (see Fig. 17).

4. Mount the outdoor-air enthalpy sensor (first sensor) to the economizer on the outside of the unit (in the same location from which the OAT was removed) using the 2 screw s pr ov ided. See Fig. 17.

5. Reconnect the blue wire removed in Step 2 to the enthalpy sensor terminal +.

6. Cut the violet wire provided to desired length and terminate with quick-connect terminal provided. Route the viole t wi re from the enthalpy sensor ter minal S, through the snap bushing, and to the economizer control module terminal S

7. Mount the second enthalpy sensor in the return-air duct (return-air sensor).

8. Route the blue wire (pr ov i ded) from term inal + on the return-air enthalpy sensor to the economizer control module terminal +.

9. Route the violet wire (provided) from terminal S on the return-air enthalpy sensor to the economizer control module term inal S

10. Turn changeover set point dial clockwise past the “D” setting, or the control will not operate on a differential. See Fig . 18.

11. Reinstall economizer hood if removed.

IMPORTANT: Be sure all seal strips and RTV sealant are intact. A watertight seal to inside of unit must be maintained.

XI. STEP 11 — INSTALL ALL ACCESSORIES

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

A. Motormaster® I Control Installation (581A155 and 180 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. 25 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles. Use field-su pp l ied screws to att ac h baf fl e s t o un i t. Sc r ews should

/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 Mot ormaster I Control s Only one Motormaster I control is required per unit. The

Motormaster I control must be used in conjunction with the Accessory 0° F Low Ambient Kit (purchas ed separately). The Motormaster I device controls outdoor 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 Ac cessory 0° F Low Ambient Kit per instruction supplied with accessory.

Dimensions in ( ) are in mm.

NOTE:

Fig. 25 — Wind Baffle Details

—13—

Sensor Assembly — Install the sensor assembly in the location shown in Fig. 26.

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

Trans f ormer (460-v Unit s Only) — On 460 volt units, a transformer is required. The transformer is provided with the accessory and must be field-installed.

Motormaste r® I Co n tr ol — Recomm ende d mounting location is on the inside of the panel to the left of the control box. The control should be mounted on the inside of the panel, vertically, with leads protruding from bottom of extrusion.

B. Motormaster III Control Installation (581A240)

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. 25 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles. Use field-supplied screws to attach baffles to unit. Screws should

/4-in. diameter and 5/8-in. long. Drill require d screw hole s

for mounting baffles.

Replace Outdoor Motor Replace outdoor-fan motor no. 1 with motor included in

accessory kit. Existing motor is not Motormaster III compatible.

Install Motor ma st er III Cont ro ls Only one Motorma st e r III cont rol is requ ire d per uni t. Sensor — Install the sensor for thermistor input control in

the location shown in Fig. 26. Connect sensor leads to the purple and grey control signal leads on the Motormaster III cont ro l .

Signal Selection Switch — Remove the cover of the Motormaster III control. Set the switch to accept the thermistor sensor input signal. Set the frequency to match the unit power supply (60 Hz).

Motormaste r III Co ntrol — Recommended mounting location is beneath the control box, mounted to the partition that separates the control box section from the indoor section.

NOTE: If unit power is supplied through the roof curb and basepan of the unit, mount the Motormaster III control on the corner post adjacent to the conduit running from the basepan to the bottom of the control box.

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

MOTORMASTER SENSOR LOCATION

HAIRPIN END

NOTES:

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

2. Field installed tubing insulation is required to be installed over the TXV (thermostatic expansion valve) bulb and capillary tube for proper operation at low ambients. Tubing insulation is only required on the po rtio n of suctio n line lo cated betw een indo or and ou tdoor sectio n.

Fig. 26 — Motormaster I and M o to rmaster III Sensor

Locations

START-UP

Use the following information and Start-Up Checklist on page CL-1 to check out unit PRIOR to start-up.

I. UNIT PREPARA TION

Check that unit has been installed in accordance with these installation ins tructions and all applicable cod es.

II. SERVICE VALVES

Ensure that the liquid line service valve is open. Damage to the compres sor could result i f it i s left closed.

III. COMPRESSOR MOUNTING

Compressors are internally spring mounte d. D o not loosen or remove compressor holddown bolts.

IV. REFRIGERANT SERVICE PORTS

Each re frigeran t system h as a tot al of 3 Sch rader-type service gage ports. One port is located on the suction line, one on the compressor discharge line, and one on the liquid line. In addition Schrader-type valves are located underneath the low-pressure switches. Be sure that caps on the ports are tight.

V. COMPRESSOR ROTATION

It is important to be certain the compressors are rotating in the proper direction. To determine whether or not compressors are rotat ing in the proper direction:

1. Connect service gages to suction and discharge pressure fitti n gs.

2. Energize the compressor.

3. The su ction pressu re should drop a nd the dischar ge pressure should rise, as is norm a l o n an y sta rt -up.

If the suction pressure does not drop and the discharge pressure does not rise to normal levels:

1. Note that the evaporator fan is probably also rota ting in the wrong direction.

2. Tu rn off power to the unit.

3. Reverse any two of the incoming power leads.

4. Tu rn on powe r to the com pr essor.

The suct ion and disc harge pr essur e levels sh ould now move to their normal start-up levels.

—14—

NOTE: When compressors are rotating in the wrong direction, the unit will have increased noise levels and will not provide heating and coolin g.

After a few minutes of reverse operation, the scroll compressor internal overload protection will open, which will activate the unit’s lockout and requires a manual reset. Reset is accomplished by turning the thermostat on and of f.

VI. INTERNAL WIRING

Check all electrical connections in unit contro l box es ; tighten as required.

VII. CRANKCASE HEATER( S)

Crankcase heater(s) is energized as long as there is power to the unit and the compressor is not operating.

IMPORTANT: Unit power must be on for 24 hours prior to start-up. Otherwise, damage to compressor may result.

VIII. EVAPORATOR FAN

Fan belt and variable pulleys are factory-installed. Remove tape from the fan pulley. See Tables 3-10 for Fan Performance Data. Be sure that fans rotate in the proper direction. See Table 11 for air quantity limits. See Table 12 for Evaporator Fan Motor Specifications. See Table 13 for static pressure information for accessories and options. See T able 14 for fan rpm at various mo tor pulley settings. To al ter fan perfor-

T able 3 — Fan Performance — 581A155225 (Low Heat Units with Stan dard Indoor Fan Motor)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

Bhp — FIOP — Watts —

*Stand ard low -med iu m stat ic dri ve rang e is 83 4 to 1064 r pm. A lter na te

high-static drive range is 1161 to 1426. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 3.13. The maxi-

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 915 1.05 838 1066 1.23 945 1278 1.47 1044 1500 1.73 1138 1731 1.99 755 991 1.14 865 1198 1.38 968 1414 1.63 1063 1639 1.89 1154 1873 2.15 788 1129 1.30 894 1341 1.54 992 1562 1.80 1084 1791 2.06 1172 2029 2. 33 822 1280 1.47 923 1497 1.72 1017 1722 1.98 1106 1956 2.25 1191 2196 2.53 857 1443 1.66 953 1666 1.92 1044 1896 2.18 1130 2133 2.45 1212 2377 2.73 891 1620 1.86 984 1847 2.12 1071 2082 2.39 1154 2323 2.67 1234 2572 2.96 927 1810 2.08 1015 20 43 2.35 1099 2282 2.62 1180 252 8 2.91 — — — 962 2014 2.32 1047 22 52 2.59 1129 2496 2.87 — — — — — — 998 2233 2.57 1080 24 76 2.85 — — — — — — — — — 1035 2466 2.84 — — — — — — — — — — — —

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1226 1971 2.27 1311 2218 2.55 1391 2474 2.85 1240 2116 2.43 1322 2366 2.72 1401 2623 3.02 — — — — — — 1255 2274 2.61 1335 2526 2.91 — — — — — — — — — 1272 2444 2.81 1350 2700 3.10 — — — — — — — — — 1291 2628 3.02 — — — — — — — — — — — —

——————————————— ——————————————— ——————————————— ——————————————— ———————————————

LEGEND

Brake Horsepower Factory-Installed Option Input Watts to Motor

mum continuous watts is 2700. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

0.20.40.60.81.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.21.41.61.82.0

mance, see Evaporator Fan Performance Adjustment section on page 26.

NOTE: A 3

/2-in. bolt and threaded plate are included in the installer’s packet. They can be added to the motor support channel belo w the m otor mounting plate to aid in raising the fan motor.

IX. CONDENSER FANS AND MOTORS

Condenser fans and motors are factory set. Refer to Condenser-Fan Adjustment section (page 27) as required. Be sure that fa ns rotate in the proper di rection.

X. RETURN-AIR FILTERS

Check that correct filters are installed in filter tracks (see Table 1). Do not operate unit without return-air filters.

XI. OUTDOOR-AIR INLET SCREENS

Outdoor-air inlet screens must be in place before operating unit.

XII. ACCESSORY ECONOMIZER ADJUSTMENT

Remove fil ter access panel. Ch eck that outdoor-air damper is closed and return-air damper is open.

Economizer operation and adjustment are described in Base Unit Operation section on page 24, and in Economizer Adjustment section on page 28.

——————

2. Static pressure losses (i.e., economizer) must be added to external

static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and

casing losses. See Table 13 for accessory/FIOP static pressure information.

5. Extensive mo tor and drive testing on these units ensures that the full

bhp an d watts rang e of the motor can be util ized with confiden ce. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your

Bryant representative for details.

—15—

Table 4 — Fan Performance — 581A155225 (Low Heat Units with Optional Indoor Fan Motor)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

Bhp — FIOP — Watts —

*Stand ard low -med iu m stat ic dri ve rang e is 83 4 to 1064 r pm. A lter na te

high-static drive range is 1161 to 1426. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the optional motor is 4.38. The maxi-

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 942 1.08 838 1091 1.25 945 1298 1.49 1044 1 513 1.74 1138 1737 2.00 755 1020 1.17 865 1223 1.41 968 1433 1.65 1063 1652 1.90 1154 1878 2. 16 788 1159 1.33 894 1366 1.57 992 1581 1.82 1084 1803 2.07 1172 2032 2. 34 822 1311 1.51 923 1522 1.75 1017 1740 2.00 1106 1966 2.26 1191 2197 2.53 857 1474 1.70 953 1690 1.94 1044 1912 2.20 1130 2141 2.46 1212 2376 2.73 891 1650 1.90 984 1871 2.15 1071 2097 2.41 1154 2329 2.68 1234 2567 2.95 927 1840 2.12 1015 20 65 2.37 1099 2295 2.64 1180 253 0 2.91 1257 277 1 3.19 962 2042 2.35 1047 22 72 2.61 1129 2506 2.88 1207 274 5 3.16 1281 298 9 3.44 998 2259 2.60 1080 24 92 2.87 1159 2730 3.14 1234 297 3 3.42 1307 322 1 3.70 1035 2489 2.86 1114 2727 3.14 1189 2969 3.41 1262 3215 3.70 1333 3466 3.99

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1226 1968 2.26 1311 2206 2.54 1391 2451 2.82 1468 2702 3.11 1543 2959 3.40 1240 2111 2.43 1322 2351 2.70 1401 2598 2.99 1476 2850 3.28 1549 3108 3.57 1255 2267 2.61 1335 2509 2.89 1412 2757 3.17 1486 3011 3.46 — — — 1272 2436 2.80 1350 2680 3.08 1425 2929 3.37 1497 3185 3.66 — — — 1291 2616 3.01 1366 2863 3.29 1440 3115 3.58 1510 3372 3.88 — — — 1310 2810 3.23 1384 3059 3.52 1456 3314 3.81 1525 3573 4.11 — — — 1332 3018 3.47 1403 3269 3.76 1473 3526 4.05 — — — — — — 1354 3238 3.72 1424 3492 4.02 1491 3751 4.31 — — — — — — 1377 3473 3.99 1445 3730 4.29 — — — — — — — — — 1401 3722 4.28 — — — — — — — — — — — —

LEGEND

Brake Horsepower Factory-Installed Option Input Watts to Motor

mum continuous watts is 3775. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

0.20.40.60.81.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.21.41.61.82.0

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

5. Extensive mo tor and drive testing on these units ensures that the full bhp an d watts rang e of the motor can be util ized with confiden ce. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—16—

T able 5 — Fan Performance — 581A180270 (Low Heat Units)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

4500 4800 5100 5700 6000 6300 6600 6900 7200 7500

CFM

4500 4800 5100 5700 6000 6300 6600 6900 7200 7500

CFM

4500 4800 5100 5700 6000 6300 6600 6900 7200 7500

Bhp — FIOP — Watts —

*Stand ard low -med iu m stat ic dri ve rang e is 87 3 to 1021 r pm. A lter na te

high-static drive range is 1025 to 1200. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 6.13. The maxi-

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 1307 1.53 761 1330 1.56 840 1572 1.84 912 1822 2.14 980 2080 2.44 747 1384 1.62 790 1515 1.78 866 1765 2.07 936 2023 2.37 1002 2289 2.68 741 1465 1.72 820 1718 2.01 893 1977 2.32 961 2243 2.63 1025 2516 2.95 810 1911 2.24 882 2182 2.56 950 2459 2.88 1014 2741 3.21 1075 3029 3.55 844 2164 2.54 914 2444 2.87 980 2730 3.20 1042 3021 3.54 1100 3317 3.89 879 2439 2.86 947 2729 3.20 1010 3023 3.55 1070 3322 3.90 1127 3626 4.25 915 2737 3.21 980 3035 3.56 1041 3338 3.91 1099 3645 4.28 1155 3957 4.64 950 3057 3.59 1013 3364 3.95 1072 3675 4.31 1129 3991 4.68 1183 4311 5.06 986 3401 3.99 1047 3717 4.36 1104 4037 4.74 1159 4361 5.11 1211 4689 5.50 1022 3770 4.42 1081 4095 4.80 1136 4423 5.19 1189 4755 5.58 1241 5091 5.97

Rpm W atts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1044 2345 2.75 1105 2619 3.07 1163 2899 3.40 1218 3187 3.74 1271 3481 4.08 1065 2561 3.00 1124 2841 3.33 1180 3127 3.67 1235 3420 4.01 1287 3720 4.36 1086 2795 3.28 1144 3082 3.61 1199 3375 3.96 1252 3674 4.31 1304 3979 4.67 1132 3324 3.90 1187 3624 4.25 1240 3929 4.61 1291 4241 4.97 1341 4558 5.35 1157 3619 4.24 1210 3925 4.60 1262 4239 4.97 1312 4557 5.34 1361 4880 5.72 1182 3935 4.62 1234 4249 4.98 1285 4569 5.36 1334 4894 5.74 — — — 1208 4274 5.01 1259 4595 5.39 1309 4922 5.77 — — — — — — 1235 4636 5.44 1285 4964 5.82 — — — — — — — — — 1262 5021 5.82 — — — — — — — — — — — —

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1322 3781 4.43 1372 4088 4.79 1419 4400 5.16 1466 4719 5.53 1511 5042 5.91 1337 4025 4.72 1386 4337 5.09 1433 4655 5.46 1479 4978 5.84 — — — 1353 4290 5.03 1401 4607 5.40 1448 4930 5.78 — — — — — — 1388 4881 5.72 — — — — — — — — — — — —

——————————————— ——————————————— ——————————————— ——————————————— ——————————————— ———————————————

LEGEND

Brake Horsepower Factory-Installed Option Input Watts to Motor

mum continuous watts is 5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

0.2 0.4 0.6 0.8 1.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8 2.0

— — —— — —— — —— — —— — —

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.22.42.62.83.0

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—17—

T able 6 — Fan Performance — 581A240270 (Low Heat Units)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000

CFM

6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000

CFM

6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000

LEGEND Bhp —

FIOP — Watts —

*Stan dard low-medium static drive range is 1002 to 1151 rpm. Al ternate

high-static drive range is 1193 to 1369. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 9.47 (for 208-v units) and 10 .33 ( f or 23 0 an d 460- v u ni ts) . T he maxi m um co nt inu ou s watts is 7915 (for 208-v units) and 8640 (for 230 and 460-v units). Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

824 2607 3.09 894 2844 3.37 961 3085 3.66 1023 3330 3.95 1083 3578 4.24 881 3030 3.59 947 3266 3.88 1009 3507 4.16 1069 3751 4.45 1126 3998 4.74 939 3488 4.14 1001 3725 4.42 1060 3965 4.70 1116 4208 4.99 1170 4454 5.28 998 3982 4.72 1055 4218 5.00 1111 4458 5.29 1165 4701 5.58 1217 4946 5.87 1056 4512 5.35 1111 4748 5.63 1164 4988 5.92 1215 5230 6.20 1264 5474 6.49 1116 5077 6.02 1167 5314 6.30 1218 5553 6.59 1266 5795 6.87 1314 6039 7.16 1175 5678 6.74 1224 5915 7.02 1272 6154 7.30 1319 6395 7.59 1364 6639 7.88 1235 6315 7.49 1282 6552 7.77 1327 6791 8.06 1372 7033 8.34 1415 7276 8.63 1295 6988 8.29 1340 7225 8.57 1383 7465 8.86 1426 7706 9.14 1468 7949 9.43

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1141 3829 4.5 4 1196 4082 4.84 12 49 43 37 5. 1 5 1301 4596 5 .4 5 1351 4856 5.76 1181 4247 5.0 4 1234 4499 5.34 12 85 47 53 5. 6 4 1334 5009 5 .9 4 1383 5267 6.25 1223 4702 5.5 8 1274 4953 5.88 13 23 52 05 6. 1 8 1371 5460 6 .4 8 1417 5716 6.78 1267 5194 6.1 6 1316 5443 6.46 13 63 56 94 6. 7 6 1409 5947 7 .0 6 1454 6202 7.36 1313 5721 6.7 9 1359 5970 7.08 14 05 62 20 7. 3 8 1449 6472 7 .6 8 1493 6726 7.98 1360 6285 7.4 6 1405 6533 7.75 14 49 67 83 8. 0 5 1491 7034 8 .3 4 1533 7286 8.64 1408 6885 8.1 7 1451 7132 8.46 14 94 73 81 8. 7 6 1535 7631 9 .0 5 — — — 1458 7521 8.9 2 1499 7768 9.22 15 40 80 16 9. 5 1 — — — — — — 1508 8193 9.7 2 1549 8440 10. 01 — — — — — — — — —

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1399 5118 6.07 1446 5381 6.38 1492 5647 6.70 1537 5914 7.02 — — — 1429 5527 6.56 1475 5789 6.87 1520 6052 7.18 — — — — — — 1462 5974 7.09 1507 6234 7.40 1550 6495 7.71 — — — — — — 1498 6459 7.66 1540 6717 7.97 — — — — — — — — — 1535 6981 8.28 — — — — — — — — — — — —

——————————————— ——————————————— ——————————————— ———————————————

Brake Horsepower Factory-Installed Option Input Watts to Motor

0.2 0.4 0.6 0.8 1.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8 2.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.2 2.4 2.6 2.8 3.0

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—18—

Ta ble 7 — Fan Performance — 581A155300 (High Heat Units with Standard Indoor Fan Motor

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

Bhp — FIOP — Watts —

*Stand ard low -med iu m stat ic dri ve rang e is 83 4 to 1064 r pm. A lter na te

high-static drive range is 1161 to 1426. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 3.13. The maxi-

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 915 1.05 844 1077 1.24 949 128 7 1.48 1047 1507 1.73 1139 1735 2.00 764 1006 1.16 872 1211 1.39 972 1425 1.64 1067 1648 1.90 1156 1880 2.16 798 1147 1.32 901 1357 1.56 997 1576 1.81 1089 1803 2.07 1175 2038 2.34 832 1301 1.50 931 1516 1.74 1024 1 739 2.00 1112 1970 2.27 1195 2209 2.54 868 1467 1.69 962 1688 1.94 1051 1 916 2.20 1136 2151 2.47 1217 2393 2.75 903 1648 1.89 994 1873 2.15 1079 2 106 2.42 1161 2345 2.70 1240 2590 2.98 939 1842 2.12 1026 2073 2.38 1109 2309 2.66 1188 2553 2.9 — — — 976 2050 2.36 1059 2286 2.63 1139 2528 2.91 — — — — — — 1012 2273 2.61 1093 2514 2.89 — — — — — — — — — 1049 2511 2.89 — — — — — — — — — — — —

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1227 1973 2.27 1310 2218 2.55 1390 2471 2.84 1241 2120 2.44 1323 2368 2.72 1400 2623 3.02 — — — — — — 1258 2281 2.62 1337 2531 2.91 — — — — — — — — — 1275 2454 2.82 — — — — — — — — — — — — 1295 2642 3.04 — — — — — — — — — — — —

LEGEND

Brake Horsepower Factory-Installed Option Input Watts to Motor

mum continuous watts is 2700. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

0.2 0.4 0.6 0.8 1.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.21.41.61.82.0

——

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—

———

—19—

T able 8 — Fan Performance — 581A155300 (High Heat Units wit h Optional Indoor Fan Motor)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

CFM

3750 4000 4250 4500 4750 5000 5250 5500 5750 6000

LEGEND Bhp —

FIOP — Watts —

*Stand ard low -med iu m stat ic dri ve rang e is 83 4 to 1064 r pm. A lter na te

high-static drive range is 1161 to 1426. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the optional motor is 4.38. The maxi-

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 942 1.08 844 1101 1.27 949 1306 1.50 1047 1520 1.75 1139 1 741 2.00 764 1035 1.19 872 1236 1.42 972 1444 1.66 1067 1661 1.91 1156 1885 2. 17

798 1177 1.35 901 1382 1.59 997 1594 1.83 1089 1814 2.09 1175 2041 2.35 832 1331 1.53 931 1540 1.77 1024 1757 2.02 1112 1980 2.28 1195 2209 2.54 868 1498 1.72 962 1711 1.97 1051 1932 2.22 1136 2158 2.48 1217 2390 2.75 903 1677 1.93 994 1896 2.18 1079 2120 2.44 1161 2350 2.70 1240 2585 2.97 939 1871 2.15 1026 20 93 2.41 1109 2321 2.67 1188 255 4 2.94 1264 279 3 3.21 976 2077 2.39 1059 23 04 2.65 1139 2536 2.92 1215 277 3 3.19 1289 301 5 3.47 1012 2298 2.64 1093 2529 2.91 1170 2765 3.18 1244 3005 3.46 1315 3250 3.74 1049 2533 2.91 1127 2768 3.18 1201 3008 3.46 1273 3252 3.74 1342 3500 4.03

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1227 1970 2.27 1310 2206 2.54 1390 2448 2.82 1467 2696 3.10 1541 2951 3.39 1241 2116 2.43 1323 2353 2.71 1400 2597 2.99 1475 2847 3.27 1548 3102 3.57 1258 2274 2.62 1337 2513 2.89 1413 2759 3.17 1486 3010 3.46 — — — 1275 2445 2.81 1352 2687 3.09 1426 2934 3.37 1498 3187 3.67 — — — 1295 2629 3.02 1369 2873 3.30 1442 3122 3.59 1511 3377 3.88 — — — 1315 2826 3.25 1388 3073 3.53 1458 3324 3.82 1527 3581 4.12 — — — 1337 3037 3.49 1408 3286 3.78 1477 3540 4.07 — — — — — — 1360 3262 3.75 1429 3513 4.04 1496 3769 4.34 — — — — — — 1384 3500 4.03 1452 3755 4.32 — — — — — — — — — 1410 3753 4.32 — — — — — — — — — — — —

Brake Horsepower

Factory-Installed Option

Input Watts to Motor

mum continuous watts is 3775. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

0.20.40.60.81.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.21.41.61.82.0

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—20—

T able 9 — Fan Perform ance — 581A180360 (High Heat Units)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

4500 4800 5100 5700 6000 6300 6600 6900 7200 7500

CFM

4500 4800 5100 5700 6000 6300 6600 6900 7200 7500

CFM

4500 4800 5100 5700 6000 6300 6600 6900 7200 7500

Bhp — FIOP — Watts —

*Stand ard low -med iu m stat ic dri ve rang e is 87 3 to 1021 r pm. A lter na te

high-static drive range is 1025 to 1200. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 6.13. The maxi-

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 1307 1.53 786 1404 1.65 861 1644 1.93 932 1893 2.22 997 215 0 2.52 747 1384 1.62 818 1603 1.88 890 1852 2.17 958 2108 2.47 1022 2 373 2.78 775 1571 1.84 850 1822 2.14 920 2079 2.44 986 2344 2.75 1048 2 616 3.07 849 2054 2.41 918 2323 2.73 982 2598 3.05 1044 2879 3.38 1102 3166 3. 71 886 2329 2.73 952 2607 3.06 1015 2891 3.39 1074 3180 3.73 1130 3474 4.08 924 2628 3.08 987 2915 3.42 1047 3207 3.76 1105 3504 4.11 1160 3807 4.46 962 2951 3.46 1023 32 46 3.81 1081 3547 4.16 1136 385 3 4.52 1190 416 3 4.88 1000 3298 3.87 1059 3603 4.23 1115 3912 4.59 1168 4225 4.96 1220 4543 5.33 1038 3672 4.31 1095 3986 4.67 1149 4303 5.05 1201 4625 5.42 1251 4950 5.81 1077 4072 4.78 1131 4394 5.15 1184 4720 5.54 1234 5050 5.92 — — —

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1060 2414 2.83 1119 2685 3.15 1175 2964 3.48 1230 3250 3.81 1282 3542 4.15 1082 2644 3.10 1140 2922 3.43 1195 3207 3.76 1248 3498 4.10 1299 3795 4.45 1106 2894 3.39 1163 3178 3.73 1216 3470 4.07 1268 3767 4.42 1319 4071 4.77 1157 3459 4.06 1211 3757 4.41 1262 4061 4.76 1312 4371 5.13 1360 4686 5.50 1184 3774 4.43 1236 4080 4.79 1287 4391 5.15 1335 4707 5.52 1382 5029 5.90 1212 4114 4.83 1263 4427 5.19 1312 4745 5.57 1359 5067 5.94 — — — 1241 4478 5.25 1290 4798 5.63 1338 5122 6.01 — — — — — — 1270 4866 5.71 — — — — — — — — — — — —

——————————————— ———————————————

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1332 3841 4.50 1381 4145 4.86 1428 4456 5.23 1473 4772 5.60 1518 5095 5.98 1349 4100 4.81 1397 4409 5.17 1443 4725 5.54 1488 5046 5.92 — — — 1367 4380 5.14 1414 4695 5.51 1460 5016 5.88 — — — — — — 1407 5007 5.87 — — — — — — — — — — — —

LEGEND

Brake Horsepower Factory-Installed Option Input Watts to Motor

mum continuous watts is 5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.

0.2040.60.81.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.21.41.61.82.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.22.42.62.83.0

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—21—

T able 10 — Fan Performance — 581A240360 (High Heat Units)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

CFM

6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000

CFM

6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000

CFM

6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000

Bhp — FIOP — Watts —

*Stan dard low-medium static drive range is 1002 to 1151 rpm. Al ternate

high-static drive range is 1193 to 1369. Other rpms require a fieldsupplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 9.47 (for 208-v units) and 10 .33 ( f or 23 0 an d 460- v u ni ts) . T he maxi m um co nt inu ou s watts is 7915 (for 208 and 575-v units) and 8640 (for 230 and 460-v units). Do not adjust motor rpm such that motor maximum bhp and/ or wat ts is exceeded at the maximum operating cfm.

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

868 2752 3.26 934 2987 3.54 997 3227 3.83 1058 3470 4.12 1115 3716 4.41 929 3201 3.80 991 3436 4.08 1051 3675 4.36 1108 3917 4.65 1162 4163 4.94 991 3687 4.37 1049 3923 4.65 1105 4161 4.94 1159 4403 5.22 1211 4647 5.51 1054 4211 5.00 1109 4447 5.28 1161 4686 5.56 1213 4926 5.84 1262 5170 6.13 1117 4773 5.66 1168 5009 5.94 1218 5247 6.22 1267 5488 6.51 1314 5731 6.80 1180 5373 6.37 1229 5609 6.65 1277 5847 6.94 1323 6088 7.22 1368 6331 7.51 1244 6011 7.13 1290 6247 7.41 1335 6485 7.69 1380 6726 7.98 1423 6968 8.27 1308 6687 7.93 1352 6924 8.21 1395 7162 8.50 1437 7402 8.78 1479 7644 9.07 1372 7401 8.78 1414 7638 9.06 1455 7876 9.34 1496 8117 9.63 1535 8358 9.92

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1171 3965 4. 7 0 1224 421 6 5.00 1 27 6 4 46 9 5.30 1326 4726 5.61 137 4 4 98 3 5.91 1215 4410 5. 2 3 1266 465 9 5.53 1 31 6 4 91 1 5.83 1364 5165 6.13 141 1 5 42 1 6.43 1262 4894 5. 8 1 1311 514 2 6.10 1 35 8 5 39 2 6.40 1404 5645 6.70 144 9 5 89 9 7.00 1310 5415 6. 4 2 1357 566 3 6.72 1 40 3 5 91 2 7.01 1447 6164 7.31 149 0 6 41 6 7.61 1360 5976 7. 0 9 1405 622 2 7.38 1 44 9 6 47 1 7.68 1492 6721 7.97 153 3 6 97 3 8.27 1412 6575 7. 8 0 1455 682 1 8.09 1 49 7 7 06 8 8.39 1538 7318 8.68 — — — 1465 7212 8. 5 6 1506 745 7 8.85 1 54 7 7 70 5 9.14 — — — — — —

151978889.36———————————— ———————————————

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1422 5243 6.22 1468 5505 6.53 1513 5768 6.84 1456 5679 6.74 1501 5938 7.04 1544 6199 7.35 — — — — — — 1493 6155 7.30 1536 6412 7.61 — — — — — — — — — 1533 6670 7.91 — — — — — — — — — — — —

LEGEND

Brake Horsepower Factory-Installed Option Input Watts to Motor

0.2 0.4 0.6 0.8 1.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8 2.0

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.2 2.4 2.6 2.8 3.0

——————

2. Static pressure losses (i.e., economizer) must be added to external static pre s su r e be for e ent ering Fan Performa nc e tabl e.

3. Interpolation is permissible. Do not extrapolate.4

4. Fan performance is based on wet coils, clean filters, and casing losses. See Table 13 for accessory/FIOP static pressure information.

6. U se of a field- supplied mo tor may affect wir ing size. Co ntact your Bryant representative for details.

—22—

Table 11 — Air Quantity Limits

UNIT 581A

155 180 240

MINIMUM

CFM

3600 6,000 4500 7,500

MAXIMUM

6000 10,000

CFM

Table 12 — Evaporator Fan Motor Specifications

UNIT

581A

(Standard

Motor)

(Optional

Motor)

Brake Horsepower

BHP —

155

180

240

NOMINAL

2.9 208 2700 85.8% 3.13 2.34 9.46

2.9 230 2700 85.8% 3.13 2.34 8.6

VOLTAGE

MAX

WATTS

2.9 460 2700 85.8% 3.13 2.34 4.3

3.7 208 3775 85.8% 4.38 3.27 10.5

3.7 230 3775 85.8% 4.38 3.27 10.5

3.7 460 3775 85.8% 4.38 3.27 4.8 5 208 5180 87.5% 6.13 4.57 15.8

5 230 5180 87.5% 6.13 4.57 15.8 5 460 5180 87.5% 6.13 4.57 7.9

7.5 208 7915 88.5% 9.47 7.06 22

7.5 230 8640 88.5% 10.33 7.71 22

7.5 460 8640 88.5% 10.33 7.71 13

Table 13 — Accessory/FIOP Economizer Static Pressure (in. wg)

UNIT 581A

155, 18 0

240

LEGEND NOTES: bhp —

FIOP —

Brake Horsepower Factory- I ns talled Opti on

UNIT

VOLTAGE

All

CFM

3,750 .03 4,000 .03 5,000 .05 6,000 .07 7,500 .10

6,000 .07 7,200 .09 9,000 .11 10,000 .12

1. The factory-assembled horizontal adapter substantially improves fan perfor ma nc e. See F ig. 27.

2. Th e stati c pres sure mu st be adde d to exter nal sta tic pre ssur e. The sum and the evap orator entering-air cfm should then be used in conjuncti on with the Fan Perfor mance table to d eterm ine blowe r rpm, bhp, and watts.

EFF.

MAX BHP

ECONOMIZER

PRESSURE DROP

MAX BkW

MAX

AMPS

Table 14 — Fan RPM at Motor Pulley Setting*

581A 0 155†

155** 180† 180** 240† 240**

*Approximate fan rpm shown.

†Indicates standard drive package.

**In dicates alternate drive package.

††Due to belt and pulley style, pulley cannot be set to this number of turns open.

†† †† †† †† 1064 1035 1006 978 949 920 891 863 834 †† †† †† †† 1426 1393 1360 1327 1294 1261 1227 1194 1161 †† †† †† †† 1021 1002 984 965 947 928 910 891 873 †† †† †† †† 1200 1178 1156 1134 1112 1091 1069 1047 1025 †† †† †† †† 1151 1132 1114 1095 1077 1058 1040 1021 1002 †† †† †† †† 1369 1347 1325 1303 1281 1259 1237 1215 1193

—23—

Fig. 27 — Fan Performance Using Accessory

Power Exhaust

XIII. GAS HEAT

Verify gas pressures before turning on heat as follows:

1. Turn off manual gas stop.

2. Connect pressure gage to supply gas pressure tap (see Fig. 13).

3. Connect pressure gage to manifold pressure tap on gas valve.

4. Turn on manual gas stop and set thermostat to HEAT position. After the unit has run for several minutes, verify that incoming pressure is 5.5 in. wg or greater, and that the manifold pressure is

3.3 in. wg. If manifold pressure must be adjusted, refer to Gas Valve Adjustme n t sect io n o n page 29 .

5. After unit has been in operation for 5 minutes, check temperatu re rise ac ross t he heat exc hange rs . See unit informative plate for correct rise limits of the heat supplied. Air quantities may need to be adjusted to bring the actual rise to within the a ll owable limits.

XIV. BASE UNIT OPERATION A. Cooling, Units Without Economizer

When the rmostat calls f or cooling, term inals G and Y 1 are energ ized. Th e indo or (evapo rator ) fan cont actor (I FC) an dcompressor contactor no. 1 (C1) are energized and evaporator-fan motor (IFM), compressor no. 1 and condenser fan start. The condenser-fan motors run continuously while unit is cooling. If the thermostat calls for a second stage of cooling by energizing Y2, compressor contactor no. 2 (C2) is energize d a n d compressor no. 2 sta rts.

B. Heating, Units Without Economizer NOTE: The 581A155-240 units have 2 stages of heat.

When the thermos tat calls for heating, power is sent to W on the IGC (integrated gas unit controller) board. An LED (light-emitting diode) on the IGC board will be on during normal operation. A check is made to ensure that the rollout switch and limit switch are closed and the induced-draft motor is running . The induced-draft motor is then energized, and when speed is proven with the hall effect sensor on the motor, the ignition activation per i od begins. The burners will ignite within 5 seconds.

If the burners do not light, there is a 22-second delay before another 5-second attempt. If the burners still do not light, this sequence is repeated for 15 minutes. After the 15 minutes have elapsed, if the burners still have not lighted, heating is locked out. To reset the control, break 24-v power to the thermos tat.

When ignition occurs the IGC board will continue to monitor the condition of the rollout and limit switches, the hall effect sensor, as well as the flame sensor. If the unit is controlled through a room thermostat set for fan auto.,45 seconds after ignition occurs, the indoor-fan motor will be energized (and the outdoor-air dampers will open to their minimum position). If for some reason the overtemperature limit opens prior to the start of the indoor fan blower, on the next attempt, the 45-second delay will be shortened to 5 seconds less than the time from initiation of heat to when the limit tripped. Gas will not be interrupted to the burners and heating will continue. Once modified, the fan on delay will not change back to 45 seconds unless power is reset to the control.

When additional heat is required, W2 closes and initiates power to the second stage of the main gas valve. When the thermo stat is sat isfied, W1 a nd W2 open and the gas v alve closes, interrupting the flow of gas to the main burners. If the call for W1 lasted less than 1 minute, the heating cycle will not terminate until 1 minute after W1 became active. If the unit is controlled through a room thermostat set for fan auto., the indoor-fan motor will continue to operate for an additional 45 seconds then stop (and the outdoor-air dampers will close). If the overtemperature limit opens after the indoor motor is stopped within 10 minutes of W1 becoming inactive, on the next cycle the time will be extended by 15 seconds. The maximum delay is 3 minutes. Once modified, the fan off delay will not change back to 45 seconds unless power is reset to the control.

A LED indicator is provided on the IGC to monitor operation. The IGC is located by removing the side panel and viewing the IGC through the view port located in the control box access panel. See Fig. 28. During normal operation, the LED is continuously on. See Table 15 for error codes.

T able 15 — IGC LED Indications

ERROR CODE LED INDICATION Normal Operation HardwareFailure Fan On/Off Delay

Modified Limit Switch Fault Flame Sense Fault Five Consecutive Limit

Switch Faults Ignition Lockout Fault Inducer Switch Fault Rollout Switch Fault Internal Control F ault

IGC — LED —

NOTES:

1. There is a 3-second pause between error code displays.

2. If more than one error code exists, all applicable error codes will be displ ayed in numerical sequence.

3. Error codes on the IGC will be lost if power to the unit is interrupted.

LEGEND

Integrated Gas Unit Contr oller Light-Emitting Diode

On Off

1 Flash

2 Flashes 3 Flashes

4 Flashes 5 Flashes

6 Flashes 7 Flashes 8 Flashes

C. Cooling, Units With Economizer

Upon a call for cooling, when outdoor ambient is above the changeover control setting, the economizer damper moves to VENT position. The compressors and evaporator and condenser fans energize and operate as per Coolin g , Units Wit hout Economiz er section on this page.

Upon a first call for cooling, when outdoor ambient is below the changeover control setting, the evaporator fan starts and the economizer is fully open. The compressors remain off.

—24—

INDUCED DRAFT MOTOR

FLUE BOX COVER

MAIN BURNER SECTION

MAIN GAS VALVE

COMBUSTION FAN HOUSING

INTEGRATED GAS UNIT CONTROLLER (HIDDEN)

CONTROL BOX ACCESS PANEL

IGC LED VIEW PORT

FIELD GAS CONNECTION

CERAMIC BAFFLE

CLIP

HEAT EXCHANGER TUBES

Upon a second-stage call for cooling, compressor no. 1 is energized and mechanical cooling is integrated with economizer cooling. If the outdoor-air temperature drops below 50 F, a cooling lockout switch prevents the compressors from running.

When supply-air temperature drops below a fixed set point, the ec on om iz er da mp er mo dul a tes to ma int ain t he t em per ature at the fixed set point.

D. Freeze Protection Thermostats

A free ze pr ote cti on the rm ost at is loc ate d o n th e to p an d bottom of the evaporator coil. It detects frost build-up and locks out the com pressors, allowing the coil to cle ar. Once frost has melted, the compressors can be reenergized by resetting the compressor lockout.

E. Heating, Units With Economizer

Outdoor-air damper stays at VENT position while evaporator fan is operating. Refer to Heating, Units without Economizer section on page 24 for heating sequence of operation.

SERVICE

WARNING: Before performing service or mainte-

nance operations on unit, turn off main power switch to unit. Elect rical shock could cau se p ersonal injury.

I. CLEANING

Inspect unit inte rior at beginni ng of each heating and co oling season and as operating conditions require. Remove unit top panel and/or si de pa nels for access to unit interior.

A. Evaporator Coil

Clean as required with commercial coil cleaner. Wash both sides of coil and flus h with clean water.

B. Condenser Coil

Clean condenser coil annually and as required by location and outdoor-air conditions. Inspect coil monthly; clean as required.

C. Condensate Drain

Check and clean each year at start of cooling season. In winter, keep drains and traps dry.

D. Filters

Clean or repl ac e a t st art of e ach hea tin g an d cool in g se as on, or more often if operating co nditions requ ire . Refer to Table 1 for type and size.

E. Outdoor-Air Inlet Screens

Clean screens with steam or hot water and a mild detergent. Do not use throwaway filters in place of screens. See Table 1 for quantity and size.

F. Main Burner

At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames. Refer to Main Burners section on page 29.

G. Flue Gas Passage ways

The flue collector box and heat exchanger cells may be inspected by removing heat exchanger access panel (Fig. 4 and 5), flue box cover, and main burner assembly (Fig. 28). Refer to Main Burners sect ion on page 29 for burner removal sequence. If cleaning is required, remove heat exchanger baffles an d clean tu be s w i th a wire br ush.

Use caution with ceramic heat exchanger baffles. When installing retaining clip, be sure the center leg of the clip extends inward toward baffle. See Fig. 29.

H. Combustion-Air Blower

Clean periodically to assure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the first heating season, inspect blower wheel bi-monthly to determine proper cleaning frequency.

To inspect blower wheel, remove heat exchanger access panel. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel assembly by removing screws holding motor mounting pl ate to top of combustion fan hou sing ( F ig. 28). The motor and wheel assembly will slide up and out of the fan housing. Remove the blower wheel from the motor shaft and clean with a detergent or solvent. Replace motor and wheel assembly.

Fig. 28 — Typical Gas Heating Section

One baffle and clip will be in each upper tube of the heat

NOTE:

exchanger.

Fig. 29 — Removing Heat Exchanger Ceramic Baffles

and Clips

—25—

II. LUBRICATION A. Compressors

Each compressor is charged with the correct amount of oil at the factory. Conventional white oil (Sontex 200LT) is used. White oil is compatible with 3GS oil, and 3GS oil may be used if the addition of oil is required. See compressor nameplate for original oil charge. A complete recharge should be four ounces less than the original oil charge When a compressor is exchang ed in th e field it is poss ible that a major portion of the oil from the replaced compressor may still be in the system. While this will not affect the reliablity of the replacement compressor, the extra oil will add rotor drag and increa se power usage. To rem ove this excess oil , an access valve may be added to the lower portion of the suction line at the inlet of the compressor. The compressor should then be run for 10 minutes, shut down and the access valve opened until no oil flows. This should be repeated twic e to make sure the proper oil level has been achieved.

B. Fan Shaft Bearings

For size 155 units, bearings are permanently lubricated. No field lubrication is required. For size 180 and 240 units, lubricate bearings at least every 6 months with suitable bearing grease. Extended grease line is provided for far side fan bearing (opposite drive side). Typical lubricants are given below:

MANUFACTURER LUBRICANT

Texaco

Mobil

Sunoco

Texaco

*Preferred lubricant because it contains rust and oxidation inhibitors.

Regal AFB-2*

Mobilplex EP No. 1

Prestige 42

Multifak 2

C. Condenser and Evaporat or-Fan Motor Bearings

The condenser- and evaporator-fan motors have permanently sealed bearings, so no field lubrication is necessary.

III. EV APORATOR FAN PERFORMANCE ADJUSTMENT (Fig. 30-32)

F an motor pulleys are fa cto ry set for speed show n in T able 1. To change fan speeds:

1. Shut off unit power supply.

2. Size 155 only: Loosen belt by loosening carriage nuts holding motor

mount assembly to fan scroll side plates (A and B).

Size 180, 240 only:

Loosen nuts on the 2 carriage bolts in the mounting base. Install jacking bolt and plateunder motor base (bolt and plate are shipped in installer’s packet). Using bolt and p late, r aise motor to top of sli de and remove belt. Secure motor in this position by tightening the nuts on the carriage bolts.

3. Loosen movable-pulley flange setscrew (see Fig. 30).

4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed. Increasin g fa n sp eed i ncre ases load on mot or. Do not exceed maximum speed specified in Table 1.

See Table 11 for air quantity limits.

5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley flange.)

6. Replace and tighten belts (see Belt Tension Adjustment section on page 27).

To align fan and motor pulleys:

1. Loosen fan pul ley setscrews .

2. Slide fan pulley along fan shaft.

3. Make angular alignment by loosening motor from mounting plate.

IV. EVAPORATOR FAN SERVICE AND REPLACEMENT A. 581A155 Units (See Fig. 31)

NOTE: To remove belts only, follow Steps 1-6.

1. Remove filter and supply-air sect ion panels.

2. Remove unit top panel.

3. Loosen carriage nuts A and B holding motor mount assembly to fan scroll side plates.

4. L o osen screw C.

5. Rotate motor mount assembly (with motor attached) as far as possible aw ay from evaporator coil.

6. Remove belt.

7. Rotate motor mount assembly back past original position towa rd evap o rator co il .

8. Remove motor mounting nuts D and E (both sides).

9. Lift motor up thr oug h top of unit.

10. Reverse above procedure to reinstall motor.

11. Check and adjust belt tens ion as necessary.

B. 581A180 and 240 Units (See Fig. 32)

The 581A180 and 240 units use a fan motor mounting system that features a slide-out motor mounting plate. To replace or service the motor, slide out the bracket.

1. Remove the evaporator-fan access panel and the heating control access pan el.

2. Remove th e center post (located between the evapora tor fan and heating control access panels) and all screws securing it.

3. Loosen nuts on the 2 carriage bolts in the motor mounting base.

4. Using jacking bolt under motor base, raise motor to top of slide and remove belt. Secure motor in this position by tightening the nuts on the carriage bolts.

5. Remove the belt drive.

Fig. 30 — Evaporator-Fan Alignment and Adjustment

—26—

Fig. 31 — 581A155 Evaporator-Fan Motor Adjustment

10. Disconnect wiring connections and remove the 4 mounting bolts.

11. Remove the motor.

12. To install the new motor, reverse St eps 1-11.

V. BEL T TENSION ADJUSTMENT

To adjust belt tension:

1. Loosen fa n mo t or bolts.

2. Size 155 Units: Move motor mounting plate up or down for proper

belt tension (

/2 in. deflecti on w ith one finger).

Size 180 and 240 Units:

Turn motor jacking bolt to move motor mounting plate up or down for proper belt tens ion (

/8 in. deflec-

tion at midsp an with one finger [9 lb forc e]).

3. Tighten nuts.

4. Adjust bolts and nut on mounting plate to secure motor i n fixed po sition.

VI. CONDENSER-FAN ADJUSTMENT A. 581A155 and 180 Units (Fig. 33)

1. Shut off unit power supply.

2. Remove access panel(s) closest to the fan to be adjusted.

3. Loosen fan hub setscrews.

4. Adjust fan height on shaft using a straightedge placed across the fan orifice.

5. Tighten setscrews and replace panel(s).

6. Turn on unit power.

B. 581A240 Units (Fig. 34)

1. Shut off unit power supply.

2. Remove fan top-grille assembly and loosen fan hub screws.

3. Adjust fan height on unit, using a straightedge placed across the fan orifice.

/2-in. bolt and threaded plate are included in the installer’s

A 3

NOTE:

packet. T hey sh ou ld be a dd ed to the m otor su pport ch annel b elow the motor mounting plate to aid in ra is in g the motor. The pl ate part nu mber is 50DP503842. The adjustment bolt is

/8 - 16 x 13/4-in. LG .

Fig. 32 — 581A180 and 240 Evaporator-Fan Motor Section

6. Remove jacking bolt and tapped jacking bolt plat e.

7. Remove the 2 screws that secure the motor mounting plate to the motor support channel.

8. Remove the 3 screws from the end of the motor support channel that interfere with the motor slide path.

9. Slide out the motor and motor mounting plate.

—27—

Dimens io n is in inches.

NOTE:

Fig. 33 — Condenser Fan Adjustment, 581A155 and 180

Dimension is in in ches.

NOTE:

Fig. 34 — Condenser Fan Adjustment, 581A240

4. Tighten setscrews and replace rubber hubcap to prevent hub from rusting to motor shaft.

5. Fill hub recess with permagum if rubber hubcap is missing.

VII. ECONOMIZER ADJUSTMENT

See Tables 16 and 17 for checkout and outdoor air temperature simulation. Make certain the outdoor-air damper is fully closed and the return-air damper is fully open before completing the following steps:

1. Tu rn on powe r to the uni t.

2. Turn the thermostat fan switch to the ON position. The damper will go to the vent position.

3. Adjust the vent position with the minimum damperposition adjustment on the economizer motor control module. See Fig. 18.

4. Set t he syste m s electo r swi tch t o C OOL posi tion and set the cooling temperature selector to its lowest setting.

NOTE: The Cooling mode may also be simulated by removing the thermostat wires from terminals Y1 and Y2 and installing a jumper between terminals R and Y1. Refer to unit label diagram for terminal locations.

T able 16 — Economizer Checkout Procedures

TEST PROCEDURE RESULTS

A. Disconnect power at TR and TR1. Disconnect jumper between P and P1. See Fig. 18. B. Jumper TR to 1. C. Jumper T1 to T. D. Disconnect outdoor-air thermostat connections from S Factory-instal led 800 ohm resistor should remain connected to S E. Reconnect power to terminals TR and TR1.

Disconnect fac tory-installed resistor from terminals S

and +.

1. LED (light-emitting diode) should be off.

2. Motor is in closed position.

TEST PROCEDURE RESULTS

and +.

1. LED should be on.

2. M otor drives towa rd open.

T able 17 — High and Low Outdoor-Air Simulati on

TEST PROCEDURE RESULTS

A. Reconnect factory-installed 800 ohm resistor between terminals SR and +. B. Connect 1200 ohm checkout resistor between terminals SO and +. C. Turn set point potentiometer to position A.

Low outdoor-air test results:

1. LED (light-emitting diode)s hould be on.

D. Turn set point potentiometer to position D. E. Disconnect 1200 ohm checkou t resistor.

2. M otor drives towa rd open.

High outdoor-air test results:

1. LED should be off.

2. M otor drive s towa rd cl os ed.

5. Set the outdoor-air thermostat (OAT), located in the economizer section of the unit (s ee Fig. 17) to 75 F.

6. If the outdoor temperature is below 75 F, the economizer will control the mixed air with the mixed-air sensor. If the outdoor air is above 75 F, place a j u m per around the contacts of the OAT.

7. Jumper term inal T to terminal T1 on the module (see Fig. 18). The economizer will go to the full open position. The outdoor-air damper will go to the full open position, and the return-air damper will go to the full closed position.

8. Adjust mechanical linkage, if necessary, for correct positioning. If may be necessary to remove the filters to adj u st the link age.

9. Remove the jumper from around the contacts of the OAT if installed in Step 6. Remove the jumper from terminals T and T1 installed in Step 7.

10. If the Cooling m ode was simulated to operate the unit in Step 4, re move th e jumper and reconne ct the thermostat wire s to termi n a ls Y1 and Y2 .

VIII. POWER FAILURE

Dampers have a spring return. In event of power failure, dampers will return to fully closed position until power is restored. Do not manually operate damper motor.

IX. REFRIGERANT CHARGE

Amount of r efrigerant charg e is listed on unit nameplate and in Table 1. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be in place when unit is operating during charging procedure.

NOTE: Do not use recycled refrigerant as it may contain contaminants.

A. No Charge

Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refrigerant (refer to Table 1).

B. Low Charge Cooling

Using appropriate cooling charging chart (see Fig. 35), add or remove refrigerant until conditions of the chart are met. Note that charging chart is different from those normally used. An accurate pressure gage and temperature-sensing device is required. Charging is accomplished by ensuring the proper amount of liquid sub-cooling. Measure liquid line pressure at the liquid line service valve using pressure gage. Connect temperature sensing device to the liquid line near the liquid line service valve and insulate it so that outdoor ambient temperature does not affect reading.

C. To Use the Cooling Charging Chart

Use the above temperature and pressure readings, and find the intersection point on the cooling charging chart. If intersection point on chart is above line, add refrigerant. If intersection point on chart is below line, carefully recover some of the charge. Recheck suction pressure as charge is adjusted.

NOTE: Indoor-air CFM must be within normal operating range of unit. All outdo or fans must be operating.

The TXV (thermostatic expansion valve) is set to maintain between 15 and 20 degrees of superheat at the compressors. The valves are factory set and should not require re-adjustment.

—28—

BOTH CIRCUITS

REDUCE CHARGE IF BELOW CURVE

150

200

250

300

350

400

140

120

100

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ALL OUTDOOR FANS MUST BE OPERATING

ADD CHARGE IF ABOVE CURVE

100

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Fig. 35 — Cooling Charging Chart

X. GAS VALVE ADJUSTMENT A. Natural Gas

The gas valve opens and closes in response to the thermostat or limit control.

When power is supplied to valve terminals D1 and C2, the main valve opens to its preset position.

The regular factory setting is stamped on the valve body (3.3 in. wg).

To a djust re gulator :

1. Set thermos tat at setting for no ca l l for heat.

2. Turn main gas valve to OFF position.

3. Remove

/8-in. pipe plug from manifold or gas valve pressure tap connection. Install a suitable pressuremeasuring device.

4. Set main gas valve to ON position.

5. Set thermos tat at setting to call for heat.

6. Remove screw cap covering regulator adjustment screw (See Fig. 36).

7. Turn adjustment screw clockwise to increase pressure or counterclockwise to decrease pressure.

8. Once desired pressure is established, set thermostat setting for no call for heat, turn off main gas valve, remove pressure-measuring device, and replace

/8-in.

pipe plug and screw cap.

XI. MAIN BURNERS

For all applications, main burners are factory set and should require no adjustment.

A. Main Burner Removal

1. Shut off (field- supplied) manual main gas valve.

2. Shut off power to unit.

3. Remove unit control box access panel, burner section access panel , and center post (Fig. 4 and 5).

4. Disconnect gas piping from gas valve inlet.

5. Remove wires from gas valve.

6. Remove wires from rollout switch.

7. Remove sensor wire and ignitor cable from IGC board.

8. Remove 2 screws securing manifold bracket to basepan.

9. Remove 2 screws that hold the burner support plate flange to the vestibule plate.

10. Lift burner assembly out of unit.

B. Cleaning and Adjustment

1. Remove burner rack from unit as described in Main Burner Removal section above.

2. Inspect burners, and if dirty, remove burners from rack.

3. Us ing a sof t bru sh, cle an bu rne rs an d cr osso ver p ort as required.

4. Adjust spark gap. See Fig. 37.

5. Reinstall burners on rack.

6. Reinstall burner rack as described above.

XII. FILTER DRIER

Replace whenever refrigerant system is exposed to atmosphere.

XIII. PROTECTIVE DEVICES A. Compressor Protection

Overcurrent Each compres sor has internal line break mo tor protection.

Overtemperature Each compressor has an internal protector to protect it

against excessively high discharge gas temperatures. Crankcase Heate r

The 581A units are equipped with a 70-watt crankcase heater to prevent absorption of liquid refrigerant by oil in the crankcase when the compressor is idle. The crankcase heater is energized when ev er there is main power to the un it and the compress or is not energized.

IMPORTANT: After prolonged shutdown or servicing, energize the crankcase heaters for 24 hours before starting the compr essors.

Compressor L ockout If any of the safeties (high-pressure, low-pressure, freeze

protection thermostat, compressor internal thermostat) trip, or if there is loss of power to the compressors, the cooling lockout (CLO) will lock the compressors off. To reset, manually move the ther mostat setting.

B. Evaporator Fan Motor Protection

On size 155 units, an internal protector with auto-reset is included in the indoor fan motor as a protection against overcurrent.

On size 180 and 240 units, a manual reset, calibrated trip, magnetic circuit breaker protects against overcurrent. Do not bypass connections or increase the size of the breaker to correct trouble. Determine the cause and correct it before reset ti ng the br ea k e r.

Fig. 36 — Gas Val ve

—29—

C. Condenser-F an Motor Protection

Each condenser-fan motor is internally protected against overtemperature.

D. High- and Low-Pressure Switches

If eit her sw itch t rips, or if th e com presso r over tempe ratur e switch activates, that refrigerant circuit will be automatically locked out by the CLO. To reset, manually move the thermostat setting.

E. Freeze Protection Ther mo stat (FPT)

An FPT is located on the top and bottom of the evaporator coil. They detect frost build-up and turn off the compressor, allowing the coil to clear. Once the frost has melted, the compressor can be reenergized by resetting the compressor lockout.

XIV. RELIEF DEVICES

All units have relief devices to protect against damage from excessive pressure s (i .e. , fir e) . T h es e d evi c e s pr ot e ct the hi gh and low side.

XV. CONTROL CIRCUIT, 24-V

This control circuit is protected against overcurrent by a

3.2 amp circuit breaker. Breaker can be reset. If it trips, determine cause of trouble befor e resetting

XVI. REPLACEMENT PARTS

A comp lete list of repla cement parts may be obtai ned from any Carrier distributor upon request.

XVII. DIAGNOSTIC LEDS

The IGC control board has a LED for diagnostic purposes. The IGC error codes are shown in Table 15.

—30—

SEE

DETAIL

"C"

SEE

DETAIL

"C"

SEE

DETAIL

"C"

581A155225

581A180270, 581A240270, AND 581A155300

581A180360 AND 581A240360

Fig. 37 — Spark Gap Adjustment

—31—

LEGEND

Fig. 38 — Typical Wiring Schematic and Fig. 39 — Typical Component Arrangement

AHA — BKR W/AT — BR — C— CAP — CB — CC — CH — CLO — CLS — COMP — CR — CT — DM — DU — EQUIP — FPT — FU — GND — GVR — HPS — HS — HV — IDM —

NOTES:

1. Compressor and fan motors therma lly prot ected; 3-p hase motor s protec ted against primary single-phasing conditions.

2. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

3. Jumpers are omitted when unit is equipped with economizer.

4. IFCB must trip amps is equal to or less than 140% full load amps.

5. On 208/230-v unit, TRAN1 is factory wired to ORN lead for 230-v power supply. If unit is to run on 208-v power supply, TRAN1 must be rewired. Disconnect the BLK wi re on TRAN1 and connect wire to 208-v RED wire. Insulate 230-v ORN wire.

6. The CLO locks out the compre ssor to prevent short cycling on compr essor overload and safety devices. Before replacing CLO, check these devices.

7. Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a single-pole, do uble-throw contact. An underlined number signifies a normally closed contact. A plain (no line) number signifies a normally open conta

Adjustable Heat Anticipator Breaks with Amp Turns Burner Relay Contactor, Compressor Capacitor Circuit Breaker Cooling Compensator Crankcase Heater Compressor Lockout Compressor Lockout Switch Compressor Motor Control R ela y Current Transformer Damper Motor Dummy Terminal Equipment Freeze Protection Thermostat Fuse Ground Gas Valve Relay High-Pressure Switch Hall Effect Sensor High Voltage Induced-Draft Motor

IFC — IFCB —

IFM — IGC — L— LED — LOR — LPS — LS — MAT — MGV — NEC — OAT — OFC — OFM — PL — QT — R— RS — SN — SW — TB — TRAN —

Indoor (Evaporator) Fan Contactor Indoor (Evaporator) Fan Circuit Breaker Indoor (Evaporator) Fan Motor Integrated Gas Unit Controller Light Light-Emitting Diode Lockout Relay Low-Pressure Switch Limit Switch Mixed-Air Thermostat Main Gas Valve National Electrical Code Outdoor-Air Thermostat Outdoor (Condenser) Fan Contactor Outdoor (Condenser) Fan Motor Plug Assembly Quadruple Terminal Relay Rollo ut Switch Sensor Switch Terminal Block Transformer

ct.

Terminal (Marked) Terminal (Unmarked) Terminal Block Splice Splice (Marked) Splice (Field Supplied)

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring T o Indicate Common Potential Only ,

Not To Represent Wiring

Fig. 38 — Typical Wiring Schematic (581A180, 208/230 V Shown)

—32—

Fig. 38 — Typical Wiring Schematic (581A180, 208/230 V Unit Shown) (cont)

—33—

ECONOMIZER OPTION/ACCESSORY

Fig. 39 — Typical Component Arrangement (581A180 Shown)

—34—

PROBLEM CAUSE REMEDY

Compressor and condenser fan will not star t.

Compressor will not start but condenser fan r uns.

Compressor cycles (other than normally satisfying thermostat).

Compressor operates continuously.

Excess ive head pressure.

Head pr essure too low.

Excessive suction pressure.

Suction pressure too low.

Compressor no. 2 will not run.

LEGEND

Thermostatic Exp ansion Valve

TXV —

TROUBLESHOOTING

Refer to Tables 18 and 19 for troubleshooting details .

Table 18 — Cooling Service Analysis

Power fa ilure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer,

or control relay. Insufficient l ine volt age. Determine cause and correct. Incorrect or f aulty wirin g. Check wiring diagra m and rewire correctly. Thermostat setting too high. Lower thermostat setting below room

Faulty wiring or loose connections in comp ressor circuit.

Compressor motor burned out, seized, or internal overload open.

Defective overload. Determine cause and replace. Compressor locked out. Determine cause for safety trip and reset

One leg of 3-phase power de ad. Replace fuse or reset circuit breaker. Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge to Defective compressor. Replace and determine caus e.

Insufficient l ine volt age. Determine cause and correct. Blocked conden ser. Determi ne cause an d correct. Defective overload. Determine cause and replace. Defective thermostat. Replace thermostat. Faulty condenser-fan motor. Repl ace. Restriction in refrigerant system. Locate restriction and remove. Dirty air filter. Replace filter. Unit undersized for load. Decrease load or increase unit size. Thermostat set too low. Reset thermo stat. Low refrigerant charge. Locate leak, repai r, and recharge. Air in system. Recover refrigerant, evacuate system, and recharge. Condenser coil dirty or restricted. Clean coil or r emove restrictio n. Dirty air filter. Replace filter. Dirty condenser coil. Clean coil. Refrigerant overcharged. Recover excess refrigerant. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

Air in system. Recover refrigerant, evacuate system, and recharge. Condenser air restricted or air short-cycling. Determine cause and correct. Low ref rigerant c harge. Check for leaks, repair, and recharge. Restriction in liquid tube. Remove restriction. High heat load. Check for source and eliminate. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

Refrigerant overcharged. Recover excess refrigerant. Dirty air filter. Replace filter. Low ref rigerant c harge. Check for leaks, repair, and recharge. Metering device or low side restricted. Remove source of restriction. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

Insuff icient evaporator airflow. Increase air quant ity. Chec k filter and replace if nece ssary. T emperature too low in conditioned area. Reset thermostat. Field-installed filter drier rest ricted. Replace. Unit in economizer mode. Proper oper ation; no remedy necessary.

Replace component.

temperature. Check wiring and repair or replace.

Determine cause. Replace compressor.

lockout. Determine cause. nameplate.

suction line.

2. Replace TXV if stuck open or closed.

suction line.

2. Replace TXV if stuck open or closed.

suction line.

2. Replace TXV if stuck open or closed.

—35—

PROBLEM CAUSE REMEDY

Burners will not ignite .

Inadequate heating.

Poor flame characteristics.

Burners will not turn off.

LEGEND

Ground

GR —

Table 19 — Heating Service Analysis

Misaligned spark electrodes. Check flame ignition and sensor electrode positioning. Adjust No gas at main burners. Check gas line for air; purge as necessary. After purging gas

Water in gas li ne. Drain water an d install drip leg to trap water . No power to furnace. Check power supply, fuses, wiring, and circuit breaker. No 24 v pow er supply to control circuit . Chec k transformer. Transformers wi th internal overcurrent

Miswired or loose connections. Check all wiring and wire nut connections. Burned-o ut heat anticipator in thermost at. Replace thermostat. Broken thermostat wires. Run continuity check. Replace wires if necessary. Dirty air filter. Clean or replace filter as necessary. Gas input to unit too low. Check gas pressure at manifold. Clock gas meter for input.

Unit undersized for application. Replace with proper unit or add additional unit. Restricted airflow. Clean filter, replace filter, or remov e any restrictio ns. Blower speed too low. Install alternate motor, if applicable, or adjust pulley to increase

Limit switch cycles main burners. Check rotation of blower, thermostat heat anticipator settings, Too much outdoor air. Adjust minimum position.

Incomplete combustion (lack of combustion air) result s in:

Aldehyde odor s, CO , sooting flame, or floating flame.

Unit is locked into Heating mode fo r a one minut e minimum.

as need ed . line of air, allow gas t o dissipat e for at least 5 minutes before

attempting to relight unit. Check gas valve.

protection require a cool-down period before resetting. Check 24-v circuit breaker; reset if necessary.

If too low, increase manifold pressure or replace with correct orifices.

fan speed. and temperature rise of unit. Adjust as needed.

Check economizer operation. Check all screws around flue outl ets and b urner compartment.

Tighten as necessary. Cracked heat exchan ger. Overfired unit — redu c e inp ut, change orifices, or adjust gas

line or manifold pressure. Check vent for restriction. Clean as necessary. Check orifice to burner alignment. Wait until mandatory one minute time period has elapsed or

power to unit.

—36—

Refer to Fig. 40 for IGC trou bleshooting information.

LEGEND

IDM — IGC —

NOTE:

Induced-Draft Motor Integrated Gas Unit Controller

Thermostat Fan Sw itch in the “AUTO” position.

Fig. 40 — IGC Control (Heating and Cool ing)

—37—

PACKAGED SERVICE TRAINING

Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, including:

• Unit Familiarization • Maintenance

• Installation Overview • Operating Sequence

A large selection of product, theory, and skills programs are available, using popular video-based formats and materials. All include video and /or slides, plus companion book.

Classroom Service Training which includes “hands-on” experience with the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting and fewer callbacks. Course descriptions and schedules are in our catalog.

CALL FOR FREE CATALOG 1-80 0-962-9212

[ ] Packaged Service Training [ ] Classroom Service Training

START-UP CHECKLIST

MODEL NO.: SERIAL NO.: DATE: TECHNICIAN:

I. PRE-START-UP

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VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

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VERIFY INSTALLATION OF INDOOR FAN MOTOR ADJUSTMENT BOLT (155) OR ADJUSTMENT BOLT AND PLATE (180, 240 ONLY)



OPEN LIQUID LINE SERVICE VA LVE



VERIFY INSTALLATION OF ECONOMIZER HOOD



VERIFY INSTALLATION OF EXHAUST HOOD

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VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

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VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

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VERIFY GAS PRESSURE TO UNIT GAS VAL VE IS WITHIN SPECIFIED RANGE

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CHECK GAS PIPING FOR LEAKS



CHECK THAT INDOOR-AIR FILTER IS CLEAN AND IN PLACE

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CHECK THAT OUTDOOR AIR INLET SCREEN IS IN PLACE



VERIFY THAT UNIT IS LEVEL

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CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREWIS TIGHT



VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

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VERIFY THAT SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION

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VERIFY THAT CRANKCASE HEATER HAS BEEN ENERGIZED 24 HOURS BEFORE START-UP

CUT ALONG DOTTED LINE

II. START-UP

ELECTRICAL

SUPPLY VOLTAGE L1-L2 COMPRESSOR AMPS — COMPRESSOR NO. 1 L1 L2 L3

— COMPRESSOR NO. 2 L1 L2 L3

SUPPLY FAN AMPS EXHAUST FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE RETURN-AIR TEMPERATURE COOLING SUPPLY AIR GAS HEAT SUPPLY AIR

PRESSURES

GAS INLET PRESSURE GAS MANIFOLD PRESSURE STAGE NO. 1 REFRIGERANT SUCTION CIRCUIT NO. 1 REFRIGERANT DISCHARGE CIRCUIT NO. 1



VERIFY REFRIGERANT CHARGE USING CHARGING CHART ON PAGE 29.

GENERAL



ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS

L2-L3 L3-L1

F DB (Dry Bulb)

F DB F WB (W et Bulb)

IN. WG

IN. WG STAGE NO. 2 IN. WG

PSIG CIRC UIT NO. 2 PSIG

PSIG CI RCUIT NO. 2 PSIG

CUT ALONG DOTTED LINE

CL-1

CATALOG NO. 5358-101

Bryant 581A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual