Bryant 589A User Manual
installation, start-up
and service instructions
SINGLE PACKAGE GAS HEATING/
ELECTRIC COOLING UNITS
CONTENTS
Page
SAFETY CONSIDERATIONS ........................1
General .........................................1
RECEIVING AND INSTALLATION .................10-22
I. Step 1 — Check Equipment .................10
II. Step 2 — Provide Unit Support ..............10
III. Step 3 — Field Fabricate Ductwork ...........10
IV. Step 4 — Provide Clearances ................10
V. Step 5 — Rig and Place Unit ................10
VI. Step 6 — Connect Condensate Drain .........13
VII. Step 7 — Install Flue Hood ..................13
VIII. Step 8 — Install Gas Piping .................13
IX. Step 9 — Install Duct Connections ...........16
X. Step 10 — Install Electrical Connections ......18
PRE-START-UP ................................22,23
START-UP ....................................23-44
I. Check for Refrigerant Leaks .................23
II. Start Up Heating Section and
Make Adjustments .........................23
III. Start Up Cooling Section and
Make Adjustments .........................26
MAINTENANCE ................................44-47
I. Air Filter ..................................45
II. Unit Top Removal ..........................45
III. Evaporator Blower and Motor ................45
IV. Flue Gas Passageways .....................45
V. Combustion-Air Blower .....................46
VI. Limit Switch ..............................46
VII. Burner Ignition ............................46
VIII. Main Burners .............................46
IX. Condenser Coil, Evaporator Coil, and
Condensate Drain Pan ......................47
X. Condenser Fan ............................47
XI. Electrical Controls and Wiring ...............47
XII. Refrigerant Circuit .........................47
XIII. Gas Input .................................47
XIV. Evaporator Airflow .........................47
XV. Metering Device — Acutrol™ Device ..........47
XVI. Liquid Line Strainer ........................47
TROUBLESHOOTING ...........................48-50
START-UP CHECKLIST ..........................CL-1
NOTE TO INSTALLER — Before the installation, READ
THESE INSTRUCTIONS CAREFULLYANDCOMPLETELY.
Also, make sure the User’s Manual and Replacement Guide
are left with the unit after installation. This unit is NOT to
be used for temporary heating of buildings or structures under construction.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified personnel should install,
repair, or service air-conditioning equipment.
588A
Sizes 018-060
589A
Sizes 024-060
Cancels: II 588A-18-8 II 588A-18-9
9/15/98
Fig. 1 — Unit 589A Shown With Optional Base Rail
Untrained personnel can perform basic maintenance functions of cleaning coils and filters. All other operations should
be performed by trained service 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 safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.
WARNING:
ation, service, maintenance,oruse can cause carbon monoxide poisoning, fire, or an explosion which can result
in personal injury or unit damage. Consult a qualified
installer, service agency, or gas supplier for information or assistance. The qualified installer or agency must
use only factory-authorizedkitsor accessories when modifying this product.
WARNING:
nance operations on unit, turn off gas supply then unit
main power switch. Electrical shock could cause personal injury.
GENERAL
The 588A, 589Aunits (see Fig. 1) are fully self-contained, combination Category I gas heating/electric cooling units designed for outdoor installation. See Fig. 2-9 (pages 2-9) for
unit dimensions. All unit sizes have discharge openings for
both horizontal and downflow configurations, and are factory
shipped with all 4 duct openings covered. Units may be installed either on a rooftop or a ground-level cement slab. See
Fig. 10 for roof curb dimensions.
Improper installation, adjustment, alter-
Before performing service or mainte-
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
UNIT
588A
ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT
CORNER WEIGHT
(lb/kg)
lbkgABCD E
UNIT HEIGHT
(in./mm)
018040 208/230-1-60 272 123 81/37 62/28 76/35 53/24 24.1/613
024040 208/230-1-60 303 138 97/44 43/20 123/56 40/18 24.1/613
024060 208/230-1-60 315 143 100/45 46/21 126/57 43/20 24.1/613
030040 208/230-1-60, 208/230-3-60 320 145 100/45 47/21 126/57 47/21 24.1/613
030060/080 208/230-1-60, 208/230-3-60 332 149 103/46 50/22 129/58 50/23 24.1/613
036060/080 208/230-1-60, 208/230-3-60, 460-3-60 336 153 86/39 76/35 111/50 63/29 24.1/613
036100/120 208/230-1-60, 208/230-3-60, 460-3-60 348 158 89/40 79/36 114/52 66/30 24.1/613
042060/080 208/230-1-60, 208/230-3-60, 460-3-60 375 170 95/43 86/39 119/54 75/34 28.1/714
042100/120 208/230-1-60, 208/230-3-60, 460-3-60 387 176 98/45 89/40 122/55 78/35 28.1/714
UNIT
588A
018040
F
in./mm
G
in./mm
CENTER OF GRAVITY in./mm
XYZ
25.07/637 20.59/523
024040 27.07/688 23.35/593
024060 26.98/685 23.27/591
030040 26.71/678 23.46/596
9
⁄16/420.7 1815⁄16/481.0
16
030060/080 27.15/689 22.36/568
036060/080 27.50/698 22.48/571
10.85/276
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings intocombustion chamber must
be provided.
LEGEND
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
036100/120 27.40/696 22.44/570
042060/080
042100/120 26.94/684 22.44/570
9
⁄16/522.3 2215⁄16/582.6
20
27.01/686 22.44/570
12.7/321
Fig. 2 — 588A018-042 Without Base Rail, Unit Dimensions
—2—
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
UNIT
588A
ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT
CORNER WEIGHT
(lb/kg)
lbkgABCD E
UNIT HEIGHT
(in./mm)
018040 208/230-1-60 296 135 87/40 68/31 82/37 59/27 27.4/697
024040 208/230-1-60 327 149 103/47 49/22 129/59 46/21 27.4/697
024060 208/230-1-60 339 155 106/48 52/24 132/60 49/22 27.4/697
030040 208/230-1-60, 208/230-3-60 344 157 106/48 53/24 132/60 53/24 27.4/697
030060/080 208/230-1-60, 208/230-3-60 356 162 102/46 71/32 123/56 60/27 27.4/697
036060/080 208/230-1-60, 208/230-3-60, 460-3-60 360 164 92/42 82/37 117/53 69/31 27.4/697
036100/120 208/230-1-60, 208/230-3-60, 460-3-60 372 169 95/43 85/39 120/55 72/33 27.4/697
042060/080 208/230-1-60, 208/230-3-60, 460-3-60 399 181 101/46 92/42 125/57 81/37 31.4/798
042100/120 208/230-1-60, 208/230-3-60, 460-3-60 411 187 104/47 95/43 128/58 84/38 31.4/798
UNIT
588A
018040
F
in./mm
G
in./mm
CENTER OF GRAVITY in./mm
XYZ
25.04/636 22.72/577
024040 26.90/683.3 20.17/512.3
024060 26.82/681.2 20.22/513.6
030040 26.57/674.9 20.1 /509.3
7
⁄8/504.8 221⁄4/565.4
19
030060/080 26.93/684 21.1 /535.4
036060/080 27.31/693.7 21.0 /532.6
13.16/334.3
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings intocombustion chamber must
be provided.
LEGEND
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
036100/120 27.23/691.6 21.0 /533.1
042060/080
042100/120 26.81/681 21.0 /533.7
7
⁄8/606.4 261⁄4/666.8
23
26.87/682.5 21.0 /533.1
14.96/380
Fig. 3 — 588A018-042 With Optional Base Rail, Unit Dimensions
—3—
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
UNIT
588A
048080 208/230-1-60, 208/230-3-60, 460-3-60 414 188 107/49 83/38 158/72 66/30
048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 426 193 110/50 86/39 159/72 71/32
060080 208/230-1-60, 208/230-3-60, 460-3-60 453 206 117/53 93/42 167/76 76/35
060100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 465 211 120/55 96/44 167/76 82/37
UNIT
588A
048080 28.76/731 23.46/596 15.35/390
048100/120/140 28.42/722 23.42/595 15.35/390
060080 28.36/720 23.27/591 15.35/390
060100/120/140 27.95/710 23.23/590 15.35/390
ELECTRICAL
CHARACTERISTICS
CENTER OF GRAVITY (in./mm)
XYZ
UNIT WEIGHT
lbkgABCD
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings intocombustion chamber must
be provided.
CORNER WEIGHT
(lb/kg)
LEGEND
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
Fig. 4 — 588A048,060 Without Base Rail, Unit Dimensions
—4—
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
UNIT
588A
048080 208/230-1-60, 208/230-3-60, 460-3-60 438 199 113/51 89/40 164/75 72/33
048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 450 205 116/53 92/42 165/75 77/35
060080 208/230-1-60, 208/230-3-60, 460-3-60 477 217 123/56 99/45 173/79 82/37
060100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 489 222 126/57 102/46 173/79 88/40
UNIT
588A
048080 28.54/724.9 20.00/508 17.66/448.6
048100/120/140 28.22/716.8 20.05/509.3 17.66/448.6
060080 28.18/715.6 20.19/512.8 17.66/448.6
060100/120/140 27.79/705.9 20.23/513.8 17.66/448.6
XYZ
ELECTRICAL
CHARACTERISTICS
CENTER OF GRAVITY (in./mm)
UNIT WEIGHT
lb kg A B C D
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings intocombustion chamber must
be provided.
CORNER WEIGHT
(lb/kg)
LEGEND
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
Fig. 5 — 588A048,060 With Optional Base Rail, Unit Dimensions
—5—
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
UNIT
589A
024040 208/230-1-60 333 151 104/47 50/23 130/59 49/22
024060 208/230-1-60 345 157 107/49 53/24 133/60 52/24
030040 208/230-1-60 336 153 97/44 66/30 118/54 55/25
030060/080 208/230-1-60 348 158 100/45 69/31 121/55 58/26
036060/080 208/230-1-60, 208/230-3-60, 460-3-60 366 166 94/43 84/38 117/53 71/32
036100/120 208/230-1-60, 208/230-3-60, 460-3-60 378 172 97/44 87/40 120/55 74/34
UNIT
589A
024040 26.71/678 20.06/510 12.65/321
024060 26.64/677 20.12/511 12.65/321
030040 27.06/687 21.05/535 12.65/321
030060/080 26.98/685 21.07/535 12.65/321
036060/080 27.14/689 21.10/536 12.65/321
036100/120 27.06/687 21.12/536 12.65/321
ELECTRICAL
CHARACTERISTICS
CENTER OF GRAVITY (in./mm)
XYZ
UNIT WEIGHT
lb kg A B C D
CORNER WEIGHT
(lb/kg)
LEGEND
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings intocombustion chamber must
be provided.
Fig. 6 — 589A024-036 Without Base Rail, Unit Dimensions
—6—
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel ...........................0
Unit top .........................36(914)
Side opposite ducts ....................36(914)
Compressor access ....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs .............48(1219)
Unit top .........................14(356)
Duct side of unit ......................2(51)
Side opposite ducts ....................14(356)
Bottom of unit .........................0
Flue panel ........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ..............42(1067)
Unit and ungrounded surfaces, control box side .......36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ................42(1067)
UNIT
589A
024040 208/230-1-60 357 163 110/50 56/25 136/62 55/25
024060 208/230-1-60 369 168 113/51 59/27 139/63 58/26
030040 208/230-1-60 360 164 103/47 72/33 124/56 61/28
030060/080 208/230-1-60 372 169 106/48 75/34 127/58 64/29
036060/080 208/230-1-60, 208/230-3-60, 460-3-60 390 177 100/45 90/41 123/56 77/35
036100/120 208/230-1-60, 208/230-3-60, 460-3-60 402 183 103/47 93/42 127/57 80/36
UNIT
589A
024040 26.57/674.9 20.17/512.3 14.96/380.0
024060 26.51/673.3 20.22/513.6 14.96/380.0
030040 26.90/683.3 21.09/535.7 14.96/380.0
030060/080 26.83/681.5 21.11/536.2 14.96/380.0
036060/080 26.99/685.5 21.14/537.0 14.96/380.0
036100/120 26.92/683.8 21.14/537.0 14.96/380.0
ELECTRICAL
CHARACTERISTICS
CENTER OF GRAVITY (in./mm)
XYZ
UNIT WEIGHT
lbkgABCD
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoor-
2. Adequate clearance around air openings intocombustion chamber must
CORNER WEIGHT
fan discharge.
be provided.
(lb/kg)
LEGEND
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
Fig. 7 — 589A024-036 With Optional Base Rail, Unit Dimensions
—7—
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
UNIT
589A
042060/080 208/230-1-60, 208/230-3-60, 460-3-60 391 178 100/45 91/41 120/55 80/36
042100/120 208/230-1-60, 208/230-3-60, 460-3-60 403 183 103/47 94/43 123/56 83/38
048080 208/230-1-60, 208/230-3-60, 460-3-60 422 192 109/50 85/39 158/72 70/32
048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 434 197 112/51 88/40 161/73 73/33
060080 208/230-1-60, 208/230-3-60 453 206 117/53 93/42 167/76 76/35
060100/120/140 208/230-1-60, 208/230-3-60 465 211 120/55 96/44 167/76 82/37
UNIT
589A
042060/080 26.66/677 21.19/538 15.35/390
042100/120 26.61/676 21.21/539 15.35/390
048080 28.45/723 19.95/507 15.35/390
048100/120/140 28.35/720 19.99/508 15.35/390
060080 28.36/720 23.27/591 15.35/390
060100/120/140 27.95/710 23.23/590 15.35/390
ELECTRICAL
CHARACTERISTICS
CENTER OF GRAVITY (in./mm)
XYZ
UNIT WEIGHT
lbkgABCD
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
NOTES:
1. Clearancesmust be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings intocombustion chamber must
be provided.
CORNER WEIGHT
(lb/kg)
LEGEND
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
Fig. 8 — 589A042-060 Without Base Rail, Unit Dimensions
—8—
REQ’D CLEARANCES FOR SERVICING. in. (mm)
Duct panel .............................0
Unit top ...........................36(914)
Side opposite ducts .....................36(914)
Compressor access .....................36(914)
(Except for NEC requirements)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)
Maximum extension of overhangs ...............48(1219)
Unit top ...........................14(356)
Duct side of unit ........................2(51)
Side opposite ducts .....................14(356)
Bottom of unit ...........................0
Flue panel .........................36(914)
CG — Center of Gravity
COND — Condenser
LV — Low Voltage
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
UNIT
589A
042060/080 208/230-1-60, 208/230-3-60, 460-3-60 415 189 106/48 97/44 126/57 86/39
042100/120 208/230-1-60, 208/230-3-60, 460-3-60 427 194 109/50 100/45 129/59 89/40
048080 208/230-1-60, 208/230-3-60, 460-3-60 446 293 115/52 91/41 164/75 76/35
048100/120/140 208/230-1-60, 208/230-3-60, 460-3-60 458 208 118/54 94/43 167/76 79/36
060080 208/230-1-60, 208/230-3-60 477 217 123/56 99/45 173/79 82/37
060100/120/140 208/230-1-60, 208/230-3-60 489 222 126/57 102/46 173/79 88/40
UNIT
589A
042060/080 26.55/674.4 21.22/539.0 17.66/448.6
042100/120 26.50/673.0 21.24/539.6 17.66/448.6
048080 28.25/717.6 20.04/509.0 17.66/448.6
048100/120/140 28.16/715.3 20.08/510.0 17.66/448.6
060080 28.18/715.6 20.19/512.8 17.66/448.6
060100/120/140 27.79/705.9 20.23/513.8 17.66/448.6
ELECTRICAL
CHARACTERISTICS
CENTER OF GRAVITY (in./mm)
XYZ
UNIT WEIGHT
lb kg A B C D
LEGEND
CORNER WEIGHT
(lb/kg)
NOTES:
1. Clearances must be maintained to prevent recirculation of air from outdoorfan discharge.
2. Adequate clearance around air openings into combustion chamber must be
provided.
NEC REQ’D CLEARANCES. in. (mm)
Between units, control box side ................42(1067)
Unit and ungrounded surfaces, control box side .........36(914)
Unit and block or concrete walls and other grounded
surfaces, control box side ..................42(1067)
Fig. 9 — 589A042-060 With Optional Base Rail, Unit Dimensions
—9—
RECEIVING AND INSTALLATION
I. STEP 1 — CHECK EQUIPMENT
A. Identify Unit
The unit model number and serial number are stamped on
unit identification plate. Check this information against shipping papers and job data.
B. Inspect Shipment
Inspect for shipping damage while unit is still on shipping
pallet. If unit appears to be damaged or is torn loose from its
anchorage, have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company. Manufacturer is not responsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify your
Bryant Heating and Cooling representative if any item is
missing.
To prevent loss or damage, leave all parts in original packages until installation.
Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should
be ducted through the roof deck to comply with applicable
fire codes.
Aminimum clearance is not required around ductwork. Cabinet return-air static shall not exceed −.25 in. wg.
IV. STEP 4 — PROVIDE CLEARANCES
The required minimum operating and service clearances are
shown in Fig. 2-9.Adequatecombustion, ventilation, and condenser air must be provided, in accordance with section 5.3,
Air for Combustion and Ventilation,of the National Fuel Gas
CodeANSIZ223.1 (in Canada, sections 7.2, 7.3 or 7.4 or Can/
CGA [Canadian Gas Association] B149 Installation Codes),
or applicable provisions of local building code.
CAUTION:
Do not restrict condenser airflow. An air
restriction at either the outdoor-air inlet or the fan discharge can be detrimental to compressor life.
II. STEP 2 — PROVIDE UNIT SUPPORT
A. Roof Curb
Install accessory roof curb in accordance with instructions
shipped with curb. See Fig. 10 for roof curb dimensions. Install insulation, cant strips, roofing, and flashing. Ductwork
must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasketing material supplied with the roof curb. Improperly applied gasketing can
also result in air leaks and poor unit performance.
1
Curb should be level to within
⁄4inch. This is necessary for
unit drain to function properly. Refer to accessory roof curb
installation instructions for additional information as
required.
B. Slab Mount
Place the unit on a solid, level concrete pad that is a minimum of 4 in. thick with 2 in. above grade. The slab should be
flush on the front of the unit (to allow condensate drain installation) and should extend 2 in. on the three remaining
sides of the unit. See Fig. 11. Install a 6-in. gravel apron in
front of condenser-air inlets to prevent obstruction of airflow
by grass or shrubs. Do not secure the unit to the slab except
when required by local codes.
C. Flush Mount
Place side of unit with duct panel flush against transition.
On units with optional base rails, the skirt on duct-panel side
of unit canberemoved to allow unit to be mounted flushagainst
transitions that extend below basepan of unit. To remove skirt,
remove 4 screws holding skirt to base rail. Then, remove skirt.
T oremove wood support under unit (with base railonly),loosen
4 screws above rigging holes and slide assembly out through
rectangular hole.
The condenser fan pushes air through the condenser coil and
discharges it through the bank of louvers in the top cover,
the decorative grille on the right side of the unit, and the compressor access panel. Be sure that the fan discharge does not
recirculate to the condenser coil. Do not locate the unit in either a corner or under an overhead obstruction. The minimum clearance under a partial overhang (such as a normal
house overhang) is 48-in. above the unit top. The maximum
horizontal extension of a partial overhang must not exceed
48 inches.
Do not place the unit where water, ice, or snow from an overhang or roof will damage or flood the unit. Do not install the
unit on carpeting, tile, or other combustible materials. The
unit may be installed on wood flooring or on Class A, B, or C
roof covering materials.
V. STEP 5 — RIG AND PLACE UNIT
CAUTION:
When installing the unit on a rooftop, be
sure the roof will support the additional weight. Refer
to Fig. 2-9 for corner weight information.
Use spreader bars or crate top when rigging the unit. The
units must be rigged for lifting as shown in Fig. 12 and 13.
Refer to Tables 1 and 2 for operating weight and to Fig. 2-9
for corner weights. Use extreme caution to prevent damage
when moving the unit. Unit must remain in an upright position during all rigging and moving operations. The unit must
be level for proper condensate drainage; therefore, the groundlevel pad or accessory roof curb must be level before setting
the unit in place. When a field-fabricated support is used, be
sure that the support is level and properly supports the unit.
III. STEP 3 — FIELD FABRICATE DUCTWORK
Secure all ducts to roof curb and building structure on vertical discharge units. Do not connect ductwork to unit. For horizontal applications, unit is provided with flanges on the horizontal openings.All ductwork should be secured to the flanges.
Insulate and weatherproof all external ductwork, joints, and
roof openings with counter flashing and mastic in accordance
with applicable codes.
—10—
PART NUMBER ‘‘A’’
FLAT
CURB
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied as required for unit being installed.
3. Dimensions in [ ] are in millimeters.
4. Roof curb is made of 16 gage steel.
5. Attach ductwork to curb (flanges of duct rest on curb).
6. Service clearance 4 ft on each side.
7. Direction of airflow.
8. Insulated panels: 1-in. thick fiberglass 1 lb density.
CPRFCURB001A00 89 [203]
CPRFCURB002A00 119 [279]
CPRFCURB003A00 149 [356]
Fig. 10 — Roof Curb Dimensions
—11—
NOTICE TO RIGGERS
Hook rigging shackles through holes in lifting brackets, as shown in Detail ‘‘A.’’Lifting brackets to be centered around the unit center of gravity.
Use wood top skid when rigging, to prevent rigging straps from damaging unit. Remove 4 screws to slide wood support through rectangular
hole in rail.
CAUTION: All panels must be in place when rigging.
Fig. 11 — Slab Mounting Details
NOTICE TO RIGGERS
Hook rigging shackles through holes in lifting brackets, as shown in Detail ‘‘A.’’Lifting brackets to be centered around the unit center of gravity.
Use wooden top skid when rigging, to prevent rigging straps from damaging unit.
CAUTION: All panels must be in place when rigging.
UNIT
588A
Size lb kg in. mm in. mm in. mm
018 332 150
024 375 170 22.4 570 24.85 631
030 384 174 22.3 565 24.85 631
036 408 185 22.0 559 24.85 631
042 447 203 22.5 571 28.85 733
048 486 220 21.0 533 34.85 885
060 525 238 21.5 545 34.85 885
UNIT
589A
024 405 184
030 408 185 22.4 569 28.9 733
036 438 199 22.4 569 28.9 733
042 463 210 22.8 579 34.9 885
048 494 224 21.1 536 34.9 885
060 525 238 21.5 545 34.9 885
MAX
WEIGHT
ABC
24.3 618 24.85 631
49.4 1255
22.8 579 28.9 733
49.4 1255
Fig. 12 — Suggested Rigging for Units Without
Base Rail
UNIT
588A
Size lb kg in. mm in. mm in. mm
018 320 145
024 363 165 22.6 574 28.2 715
030 380 172 22.5 571 28.2 715
036 396 180 22.2 563 28.2 715
042 435 197 22.6 574 32.2 816
048 474 215 21.2 538 38.2 969
060 513 233 21.6 549 38.2 969
UNIT
589A
024 393 178
030 396 180 22.6 574 32.2 816
036 426 193 22.5 571 32.2 816
042 451 205 22.9 582 38.2 969
048 482 219 21.3 540 38.2 969
060 513 233 21.6 549 38.2 969
MAX
WEIGHT
ABC
24.4 619 28.2 715
49.4 1255
22.9 582 32.2 816
49.4 1255
Fig. 13 — Suggested Rigging for Units With
Optional Base Rail
A. Units Without Base Rail
If accessory rigging brackets are to be used for rigging, install them as follows:
WARNING:
Secure screws and paint protectors solidly against unit basepan to hold lifting brackets in
position.
Never use lifting brackets when the temperature is below −10 F.
Never exceed 200 lbs per bracket of lifting force.
Never use lifting brackets for lifting other models of air-
conditioning units.
Lifting point should be directly over the unit center of
gravity.
1. Position brackets as close to the corners of unit as possible. Be sure brackets are well outside of center of gravity. (See Fig. 2, 4, 6, 8, and 12.).
2. Positionpaint protectors and foam strips between screws
and painted surface of unit. Tighten screws until they
make contact with the paint protectors.
3. Secure device or hook of sufficient strength to hole in
bracket as shown in detail ‘‘A’’ of Fig. 12.
4. If wood top is available, use it for a spreader bar to prevent straps from damaging unit. If wood top is not available, use spreader bars of sufficient length.
—12—
B. Units With Optional Base Rail
Lifting holes are provided in optional base rail as shown in
Fig. 13. Operating weights are shown in Tables 1 and 2. Refer to rigging instructions on unit.
Protective wood support must be removed from unit before
unit is mounted to curb. Remove 4 screws that secure support above rigging holes in rails. Slide support out through
rectangular hole in rail. See Fig. 13.
VI. STEP 6 — CONNECT CONDENSATE DRAIN
NOTE: When installing condensate drain connection be sure
to comply with local codes and restrictions.
Model 588A, 589A disposes of condensate water through a
3
in. NPTfittingwhich exits through the compressor access panel.
See Fig. 2-9 for location.
Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in
ground-level installations. Install a field-supplied condensate trap at end of condensate connection to ensure proper
drainage. Make sure that the outlet of the trap is at least
1 in. lower than the drain-pan condensate connection to prevent the pan from overflowing. See Fig. 14. Prime the trap
with water. When using a gravel apron, make sure it slopes
away from the unit.
If the installation requiresdrainingthecondensate water away
from the unit, install a 2-in. trap at the condensate connection to ensure proper drainage. See Fig. 14. Make sure that
the outlet of the trap is at least 1 in. lower than the drainpan condensate connection to prevent the pan from overflowing. Prime the trap with water. Connect a drain tube using a
3
minimum of
⁄4-in. PVC or3⁄4-in. copper pipe (all fieldsupplied) at the outlet end of the 2-in. trap. Do not undersize
the tube. Pitch the drain tube downward at a slope of at least
one in. for every 10 ft of horizontal run. Be sure to check the
drain tube for leaks.
Fig. 14 — Condensate Trap
VII. STEP 7 — INSTALL FLUE HOOD
The flue hood assembly is shipped screwed to the control box
in the burner compartment. Remove the burner access panel
to locate the assembly.
For units being installed in California Air Quality Management Districts which require NO
emissions of 40 nanograms/
x
joule or less, kit CRLOWNOX001A00 must be installed.
CAUTION:
The venting system is designed to ensure proper venting. The flue hood assembly must be
installed as indicated in this section of the unit installation instructions.
Install the flue hood as follows:
1. This installation must conform with local building codes
and with the National Fuel Gas Code (NFGC), American National Standards Institute (ANSI) Z223.1 (in
Canada, CAN/CGA B149.1, and B149.2) or NFPA (National Fire Protection Association) latest revision. Refer
to Provincial and local plumbing or wastewater codes
and other applicable local codes.
2. Remove from shipping location. Place vent cap assembly over flue panel. Orient screw holes in vent cap with
holes in the flue panel.
3. Secureflue hood to flue panel by inserting a single screw
on the right side, the left side, and the top of the hood.
VIII. STEP 8 — INSTALL GAS PIPING
The gas supply pipe enters the unit through the access hole
provided. The gas connection to the unit is made to the
FPT gas inlet on the manual shutoff or gas valve.
Install a gas supply line that runs to the heating section. Refer to Table 3 and the NFGC for gas pipe sizing. Do not use
⁄
4
cast-iron pipe. It is recommended that a black iron pipe is
used. Check the local utility for recommendations concerning existing lines. Size gas supply piping for 0.5 in. wg maximum pressure drop. Never use pipe smaller than the
FPT gas inlet on the unit gas valve.
For natural gas applications, the gas pressure at unit gas connection must not be less than 4.0 in. wg or greater than
13 in. wg while the unit is operating. For propane applications, the gas pressure must not be less than 4.0 in. wg or
greater than 13 in. wg at the unit connection.
1
⁄8-in. NPT plugged tapping accessible for test gage con-
An
nection must be installed immediately upstream of the gas
supply connection to the furnace.
When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFGC ANSI
Z223.1-1988 NFP Alatestedition(inCanada, CAN/CGA B149.1,
(2)-M86). In the absence of local building codes, adhere to the
following pertinent recommendations:
1. Avoid low spots in long runs of pipe. Grade all pipe
1
⁄4inch in every 15 ft to prevent traps. Grade all horizontal runs downward to risers. Use risers to connect to
heating section and to meter.
2. Protect all segments of piping system against physical
and thermal damage. Support all piping with appropriate straps, hangers, etc. Use a minimum of one hanger
1
every 6 ft. For pipe sizes larger than
⁄2in., follow rec-
ommendations of national codes.
3. Apply joint compound (pipe dope) sparingly and only to
male threads of joint when making pipe connections. Use
only pipe dope that is resistant to action of liquefied
petroleum gasesasspecified by local and/or national codes.
Never use Teflon tape.
4. Install sediment trap in riser leading to heating section
per Fig. 15. This drip leg functions as a trap for dirt and
condensate.
5. Installan accessible, external, manual main shutoff valve
in gas supply pipe within 6 ft of heating section.
6. Install ground-joint union close to heating section between unit manual shutoff and external manual main
shutoff valve.
7. Pressure-test all gas piping in accordance with local and
national plumbing and gas codes before connecting piping to unit.
NOTE: Pressuretest the gas supply system after the gas sup-
ply piping is connected to the gas valve. The supply piping
must be disconnected from the gas valve during the testing
of the piping systems when test pressure is in excess of
0.5 psig. Pressure test the gas supply piping system at pressures equal to or less than 0.5 psig. The unit heating section
must be isolated from the gas piping system by closing the
external main manual shutoff valve and slightly opening the
ground-joint union.
1
⁄2-in.
1
⁄2-in.
—13—
Table 1 — Physical Data — Unit 588A
UNIT SIZE 588A 018040 024040 024060 030040 030060 030080 036060 036080 036100 036120
1
⁄
NOMINAL CAPACITY (ton) 1
OPERATING WEIGHT (lb)
Without Base Rail 272 303 315 320 332 332 336 336 348 348
With Optional Base Rail 296 327 339 344 356 356 360 360 372 372
COMPRESSORS Rotary Reciprocating
Quantity 11
REFRIGERANT (R-22)
Charge (lb) 2.60 2.75 2.75 3.40 3.40 3.40 4.30 4.30 4.30 4.30
REFRIGERANT METERING DEVICE Acutrol™ Device
Orifice ID (in.) .030 .030 .030 .030 .030 .030 .032 .032 .032 .032
CONDENSER COIL
Rows...Fins/in. 1...17 1...17 1...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17
Face Area (sq ft) 5.95 5.95 5.95 5.95 5.95 5.95 5.95 5.95 5.95 5.95
CONDENSER FAN
Nominal Cfm 1700 1700 1700 1900 1900 1900 1900 1900 1900 1900
Diameter (in.) 18 18 18 18 18 18 18 18 18 18
Motor Hp (Rpm)
EVAPORATOR COIL
Rows Fins/in.
Face Area (sq ft) 1.83 2.29 2.29 2.29 2.29 2.29 3.06 3.06 3.06 3.06
EVAPORATOR FAN Direct Drive
Nominal Airflow (Cfm) 600 800 800 1000 1000 1000 1200 1200 1200 1200
Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10
Motor Hp
FURNACE SECTION*
Burner Orifice (Qty...drill size)
Natural Gas
Burner Orifice (Qty...drill size)
Propane Gas
RETURN-AIR FILTERS (in.)†
Throwaway 20x20 20x20 20x20 20x24 20x24 20x24 20x24 20x24 20x24 20x24
2
1
⁄8(850)1⁄8(850)1⁄8(850)1⁄8(850)1⁄8(850)1⁄8(850)1⁄4(1050)1⁄4(1050)1⁄4(1050)1⁄4(1050)
3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15
1
⁄
4
1...32 1...32 2...40 1...32 2...40 2...32 2...40 2...32 2...30 3...32
1...41 1...41 2...47 1...41 2...47 2...42 2...47 2...42 2...40 3...42
222
1
⁄
4
1
⁄
4
1
⁄
2
1
⁄
4
1
2
⁄
2
1
⁄
4
1
2
⁄
2
1
⁄
4
3333
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
UNIT SIZE 588A 042060 042080 042100 042120 048080 048100 048120 048140 060080 060100 060120 060140
1
⁄
2
31⁄
2
31⁄
2
31⁄
2
NOMINAL CAPACITY (ton) 3
OPERATING WEIGHT (lb)
Without Base Rail 375 375 387 387 414 426 426 426 453 465 465 465
With Optional Base Rail 399 399 411 411 438 450 450 450 477 489 489 489
COMPRESSORS Reciprocating Hermetic Scroll
Quantity 11
REFRIGERANT (R-22)
Charge (lb) 5.20 5.20 5.20 5.20 6.50 6.50 6.50 6.50 7.00 7.00 7.00 7.00
REFRIGERANT METERING Acutrol Device
DEVICE
Orifice ID (in.) .034 .034 .034 .034 .030 .030 .030 .030 .030 .030 .030 .030
CONDENSER COIL
Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17
Face Area (sq ft) 7.04 7.04 7.04 7.04 8.67 8.67 8.67 8.67 8.67 8.67 8.67 8.67
CONDENSER FAN
Nominal Cfm 1900 1900 1900 1900 2400 2400 2400 2400 2400 2400 2400 2400
Diameter (in.) 18 18 18 18 20 20 20 20 20 20 20 20
Motor Hp (Rpm)
EVAPORATOR COIL
Rows Fins/in. 3...15 3...15 3...15 3...15 3...15 3...15 3...15 3...15 4...15 4...15 4...15 4...15
Face Area (sq ft) 3.33 3.33 3.33 3.33 4.44 4.44 4.44 4.44 4.44 4.44 4.44 4.44
EVAPORATOR FAN Direct Drive
Nominal Airflow (Cfm) 1400 1400 1400 1400 1600 1600 1600 1600 1995 1995 1995 1995
Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x11 10x11 10x11 10x11
Motor Hp
FURNACE SECTION*
Burner Orifice (Qty...drill size)
Natural Gas
Burner Orifice (Qty...drill size)
Propane Gas
RETURN-AIR FILTERS (in.)†
Throwaway 24x24 24x24 24x24 24x24 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30
*Based on altitude of 0-2000 feet.
†Required filter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated
cooling airflow or the heating airflow at a velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity
type. For non-standard air filters, air filter pressure drop must not exceed 0.08 in. wg.
1
⁄4(1050)1⁄4(1050)1⁄4(1050)1⁄4(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)
3
⁄
4
3
⁄
3
4
⁄
4
3
⁄
4
2...40 2...32 2...30 3...32 2...32 2...30 3...32 3...31 2...32 2...30 3...32 3...31
2...47 2...42 2...40 3...42 2...42 2...40 3...42 3...40 3...42 2...40 3...42 3...40
44445555
3
⁄
3
4
⁄
4
3
⁄
4
3
⁄
4
1111
—14—
Table 2 — Physical Data — Unit 589A
UNIT SIZE 589A 024040 024060 030040 030060 030080 036060 036080 036100 036120
1
⁄
NOMINAL CAPACITY (ton) 222
OPERATING WEIGHT (lb)
Without Base Rail 333 345 336 348 348 366 366 378 378
With Optional Base Rail 357 369 360 372 372 390 390 402 402
COMPRESSORS Scroll
Quantity 1
REFRIGERANT (R-22)
Charge (lb) 3.9 3.9 4.5 4.5 4.5 5.4 5.4 5.4 5.4
REFRIGERANT METERING DEVICE Acutrol™ Device
Orifice ID (in.) .034 .034 .030 .030 .030 .032 .032 .032 .032
CONDENSER COIL
Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17
Face Area (sq ft) 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0
CONDENSER FAN
Nominal Cfm 2200 2200 2200 2200 2200 2200 2200 2200 2200
Diameter (in.) 20 20 20 20 20 20 20 20 20
Motor Hp (Rpm)
EVAPORATOR COIL
Rows Fins/in.
Face Area (sq ft) 3.6 3.6 2.7 2.7 2.7 3.6 3.6 3.6 3.6
EVAPORATOR FAN* Direct Drive
Nominal Airflow (Cfm) 800 800 1000 1000 1000 1200 1200 1200 1200
Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10
Motor Hp
FURNACE SECTION†
Burner Orifice (Qty...drill size)
Natural Gas
Burner Orifice (Qty...drill size)
Propane Gas
RETURN-AIR FILTERS (in.)**
Disposable 24x24 24x24 24x24 24x24 24x24 24x24 24x24 24x24 24x24
1
⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)
2...15 2...15 3...15 3...15 3...15 4...15 4...15 4...15 4...15
1
⁄
4
1
⁄
4
1...32 2...41 1...32 2...40 2...32 2...40 2...32 2...30 3...32
1...41 2...47 1...41 2...47 2...42 2...47 2...42 2...40 3...42
2
1
⁄
4
1
2
⁄
2
1
⁄
4
1
2
⁄
2
1
⁄
4
3333
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
UNIT SIZE 589A 042060 042080 042100 042120 048080 048100 048120 048140 060080 060100 060120 060140
1
⁄
2
31⁄
2
31⁄
2
31⁄
NOMINAL CAPACITY (ton) 3
OPERATING WEIGHT (lb)
Without Base Rail 391 391 403 403 422 434 434 434 453 465 465 465
With Optional Base Rail 415 415 427 427 446 458 458 458 477 489 489 489
COMPRESSORS Scroll
Quantity 1
REFRIGERANT (R-22)
Charge (lb) 5.7 5.7 5.7 5.7 5.8 5.8 5.8 5.8 7.00 7.00 7.00 7.00
REFRIGERANT METERING Acutrol Device
DEVICE
Orifice ID (in.) .034 .034 .034 .034 .034 .034 .034 .034 .030 .030 .030 .030
CONDENSER COIL
Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17 2...17
Face Area (sq ft) 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.67 8.67 8.67 8.67
CONDENSER FAN
Nominal Cfm 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400 2400
Diameter (in.) 20 20 20 20 20 20 20 20 20 20 20 20
Motor Hp (Rpm)
EVAPORATOR COIL
Rows Fins/in. 3...15 3...15 3...15 3...15 4...15 4...15 4...15 4...15 4...15 4...15 4...15 4...15
Face Area (sq ft) 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.44 4.44 4.44 4.44
EVAPORATOR FAN* Direct Drive
Nominal Airflow (Cfm) 1400 1400 1400 1400 1600 1600 1600 1600 1995 1995 1995 1995
Size (in.) 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x10 10x11 10x11 10x11 10x11
Motor Hp
FURNACE SECTION†
Burner Orifice (Qty...drill size)
Natural Gas
Burner Orifice (Qty...drill size)
Propane Gas
RETURN-AIR FILTERS (in.)**
Disposable 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30 24x30
*Size 048 evaporator fan is equipped with a 460-v or integrated control motor (ICM). Size 060 evaporator fan is
equipped with an ICM only. The ICM provides variable speed.
†Based on an altitude of 0-2000 feet.
**Required filter sizes shown are based on the ARI (Air Conditioning & Refrigeration Institute) rated heating airflow
at a velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type. For non-standard air filters, air
filter pressure drop must not exceed 0.08 in. wg.
1
⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄4(1100)1⁄3(1050)1⁄3(1050)1⁄3(1050)1⁄3(1050)
3
⁄
4
3
⁄
4
3
⁄
4
2...40 2...32 2...30 3...32 2...32 2...30 3...32 3...31 2...32 2...30 3...32 3...31
2...47 2...42 2...40 3...42 2...42 2...40 3...42 3...40 3...42 2...40 3...42 3...40
2
3
⁄
4
44445555
3
⁄
4
3
⁄
4
3
⁄
4
3
⁄
4
1111
—15—
(Text continued from page 13)
A. Configuring Units for Downflow (Vertical) Discharge
CAUTION:
gas valve and manifold assembly are forced out of position while connecting improperly-routed rigid gas piping to the gas valve. Use a backup wrench when making connection to avoid strain on, or distortion of, the
gas control piping.
CAUTION:
lowed by the authority having jurisdiction, black iron
pipe shall be installed at the gas valve and shall extend a minimum of 2 in. outside the unit casing.
WARNING:
when checking for gas leaks. Never purge gas line into
combustion chamber .Failure to follow this warning could
result in an explosion causing personal injury or death.
8. Check for gas leaks at the field-installed and factoryinstalled gas lines after all piping connections have been
completed. Use soap-and-water solution (ormethodspecified by local codes and/or regulations).
Unstable operation may occur when the
If a flexible conductor is required or al-
Never use a match or other open flame
WARNING:
nance operations on the system, turn off main power to
unit or electrical shock could result.
1. Openallelectricaldisconnects before starting any service work.
2. Remove return duct cover located on duct panel.
Figure 16 shows duct cover removed. Save duct cover
and screws.
3. Locatelances in basepan insulation that are placed over
the perimeter of the vertical duct opening cover
(Fig. 17).
4. Using a straight edge and sharp knife, cut and remove
the insulation around the perimeter of the cover. Remove and save 5 screws securing the cover to the basepan and slide out the cover. Discard the cover (Fig. 18).
5. Remove supply duct cover located on duct panel.
Figure 16 shows duct cover removed. Save duct cover
and screws.
6. Removeand discard 2 screws which secure vertical discharge opening cover to basepan (Fig. 19). Slide cover
forward to disengage,thentiltand remove cover through
vertical discharge opening in bottom of unit. Discard
duct cover (Fig. 20).
CAUTION:
Do not leave screws on rooftop as permanent damage
to the roof may occur.
Before performing service or mainte-
Collect ALL screws that were removed.
Fig. 15 — Sediment Trap
IX. STEP 9 — INSTALL DUCT CONNECTIONS
The unit has duct flanges on the supply- and return-air openings on the side and bottom of the unit. See Fig. 2-9 for connection sizes and locations.
7. If unit ductwork is to be attached to vertical opening
flanges on theunitbasepan (jackstand applications only),
do so at this time.
8. It is recommended that the basepan insulation around
the perimeter of the vertical return-air opening be secured to the basepan with aluminum tape. Applicable
local codes may require aluminum tape to prevent exposed fiberglass.
9. Cover both horizontal duct openings with the duct covers from Steps 2 and 5. Make sure opening is air- and
watertight.
10. After completing unit conversion, perform all safety
checks and power up unit.
NOTE: The design and installation of the duct system must
be in accordance with the standards of the NFPA for installation of nonresidence-type air conditioning and ventilating
systems, NFPA 90A or residence-type, NFPA 90B; and/or local codes and residence-type, NFPA 90B; and/or local codes
and ordinances.
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