Trane 4YCZ6024A1060A User manual

SSAAFFEETTYY WWAARRNNIINNGG
Only qualified personnel should install and service the equipment The installation, starting up, and servicing of heating, ventilating, and air-conditioning
equipment can be hazardous and requires specific knowledge and training Improperly installed, adjusted or altered equipment by an unqualified person
could result in death or serious injury When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment
December 2022 1188--EEBB2288DD11--1122CC--EENN
Single Packaged Gas/Electric 16 SEER Convertible,
2 - 5 Ton, 60 - 115 K TU, R-410A
4YCZ6024A1060A
4YCZ6036C1070B
4YCZ6036C1090B
4YCZ6036A3075C
4YCZ6036A3096C
4YCZ6036A4075D
4YCZ6036A4096D
4YCZ6048C1090A
4YCZ6048C1115A
4YCZ6048A3096C
4YCZ6048A3120C
4YCZ6048A4096D
4YCZ6048A4120D
4YCZ6060C1115A
4YCZ6060A3120C
4YCZ6060A4120D
NNoottee:: “Graphics in this document are for representation
only. Actual model may differ in appearance.”
NNoottee:: “Unit specific Service Facts available online.”
Installation and Operations Manual

©2022 18-EB28D1-12C-EN
SAFETY SECTION
IImmppoorrttaanntt — This document contains a wiring
diagram, a parts list, and service information This is
customer property and is to remain with this unit
Please return to service information pack upon
completion of work
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IImmppoorrttaanntt:: Wear appropriate loves, arm sleeve
protectors and eye protection when
servicin or maintainin this equipment.
IImmppoorrttaanntt:: Air filters and media wheels or plates shall
meet the test requirements in UL 900.

18-EB28D1-12C-EN 3
Introduction, Unit Inspection and
Specification 4
Introduction 4
Inspect Shipment 4
Product Specifications 5
Charging in Cooling above 55°F OD
Ambient 9
Determine Unit Clearances 10
Review Location and Recommendation
Information 12
Unit Installation 14
Install Flue Hood 14
Ground Level Installation 14
Rooftop Installation—Curb
Mounting 14
Install Full Perimeter Roof Mounting
Curb 14
Lifting and Rigging 15
Rooftop Installation — Frame
Mounting 16
Rooftop Installation — No Curb/
Frame 17
Ductwork Installation 19
Attaching Downflow Ductwork to
Roof Curb 19
Attaching Downflow Ductwork to
Roof Frame 19
Attaching Horizontal Ductwork to
Unit 20
Condensate Drain Piping 20
Gas Piping Installation 20
Air Filter Installation 23
Electrical Wiring 23
Unit Startup 26
Pre-Start Quick Checklist 26
Starting the Unit in Cooling Mode 26
Heating Cycle 26
Starting the Unit in the Gas Heating
Mode 27
Sequence of Operation 27
Heating Cycle 27
Cooling Cycle 28
Final Installation Checklist 28
Maintenance 29
Owner Maintenance 29
Service Maintenance 29
ECM Fan Motor Adjustments 30
Pressure Curves 31
Indoor Fan Performance 35
Refrigerant Circuit 38
Troubleshooting Chart 39
Table of Contents
Important Product Information 40

418-EB28D1-12C-EN
Introduction, Unit Inspection and Specification
Introduction
Read this manual carefully before attempting to install,
operate, or perform maintenance on this unit
Installation and maintenance should be performed by
qualified service technicians only Do NOT use this
furnace for temporary heating of buildings under
construction
As shipped from the factory, this unit is for use with
natural gas only It is listed by Underwriters
Laboratory An LP Gas conversion kit is available
Extreme mounting kits for slab and curbs are also
available
Packaged units are designed for outdoor mounting
with a vertical condenser discharge They can be
located either at ground level or on a roof in
accordance with local codes or National Fuel Gas Code
(ANSI-Z223 1A) Latest Revision Since these units are
designed exclusively for outdoor operation, additional
flue venting systems are not required Each unit
contains an operating charge of refrigerant as shipped
Extreme mounting kits are available for slab
(BAYEXMK003A), utility curb (BAYEXMK002B), or curb
(BAYEXMK001A) mountings
NNoottee:: The packa ed units have been evaluated in
accordance with the Code of Federal Re ulations,
Chapter XX, Part 3280 or the equivalent.
"SUITABLE FOR MOBILE HOME USE".
Inspect Shipment
1 Check for damage after the unit is unloaded Report
promptly to the carrier any damage found to the
unit Do not drop the unit
IImmppoorrttaanntt:: To prevent dama e to the sides and top
of the unit when hoistin , use
“spreader bars” see, “Rooftop
Installation — No Curb/Frame,” p. 17.
2 Check the unit’s nameplate to determine if the unit
is correct for the intended application The power
supply must be adequate for both the unit and all
accessories
3 Check to be sure the refrigerant charge has been
retained during shipment Remove the Compressor
access panel to access the 1/4" flare pressure taps
4 The Flue Hood is included with the unit’s literature
pack
5 If this unit is being installed on a curb, verify that
the correct curb is provided with the unit
• 4YCZ6024 and 4YCZ6036 use model
BAYCURB050
• 4YCZ6048 and 4YCZ6060 use model
BAYCURB051
6 If the unit is being hoisted, accessory kit
BAYLIFT002B is recommended It includes a kit of
four (4) lifting lugs and instructions
NNoottee:: If practical, install any internal accessories to the
unit at the shop.

18-EB28D1-12C-EN 5
Product Specifications
UNITS 4YCZ6024
*060
4YCZ6036
*070[*090]
4YCZ6048
*090[*115]
4YCZ6060
*115
RATED Volts/PH/Hz 208–230/1/60 - 1 PHASE
Performance Cooling BTUH (a) 24000 35600 48000 57500
Indoor Airflow (CFM) 790 1175 1520 1950
Power Input (KW) LOCATED ON UNIT NAMEPLATE
EER H/L/SEER BTU/Watt-Hr (b) 12.0 / 16.0 12 / 13.6 / 16.6 12 / 13.5 / 16 12.2/ 17.45/16
Sound Power Rating [dB(A)] (c) 65.4 70.0 71 72
PERFORMANCE HEATING (d)
Input BTUH-1st Stage 48000 56000 [72000] 72000 [92000] 92000
Input BTUH-2nd Stage 60000 70000 [90000] 90000 [115000] 115000
AFUE 81 81 81 81
Temp rise-Min/Max (F°) 40 / 70 30 / 60 [40 / 70] 30 / 60 [40 / 70] 30 / 60
Orifice Qty/Drill Size (Nat Gas)(e) 2 / #37 2 / #33 [3 / #37] 3 / #37 [3 / #32] 3 / #32
POWER CONN. — V/Ph/Hz 208–230/1/60
Min. Brch. Cir. Ampacity (f) LOCATED ON UNIT NAMEPLATE
Fuse Size — Max/Rec (A) LOCATED ON UNIT NAMEPLATE
COMPRESSOR SCROLL 2 STAGE SCROLL
VOLTS/PH/HZ 208–230/1/60
R.L. Amps — L.R. Amps LOCATED ON UNIT NAMEPLATE
OUTDOOR COIL — TYPE SPINE FIN
Rows/F.P.I 2 / 24
Face Area (sq. ft.) 13.32 15.49 23.57 23.57
Tube Size (in.) 3/8
Refrigerant Control EXPANSION VALVE
INDOOR COIL — TYPE MCHE PLATE FIN
Rows/F.P.I 2/16 4/15
Face Area (sq. ft.) 2.7 3.54 5.0
Tube Size (in.) 13/8
Refrigeration Control EXPANSION VALVE
Drain Conn. Size (in.) 3/4 FEMALE NPT
OUTDOOR FAN — TYPE PROPELLER
DIA. (IN.) 23.4 23.4 28.2 28.2
DRIVE/NO. SPEEDS DIRECT / 1
CFM @ 0.0 in. w.g. (g) 2550 3000 4200 4700
Motor — HP/R.P.M 1/12 /810 1/6 /830 1/6 /830 1/4 /830
Volts/Ph/Hz 208–230/1/60
F.L. Amps/L.R Amps LOCATED ON UNIT NAMEPLATE
INDOOR FAN — TYPE CENTRIFUGAL
Dia. x Width (in.) 10x10 11x10
Drive/No. Speeds DIRECT / VARIABLE
CFM @ 0.0 in. w.g. (h) SEE FAN PERFORMANCE TABLE
Motor — HP / R.P.M. 1/2 / VARIABLE 3/4 / VARIABLE 1 / VARIABLE
Volts/Ph/Hz 208–230/1/60
IInnttrroodduuccttiioonn,, UUnniitt IInnssppeeccttiioonn aanndd SSppeecciiffiiccaattiioonn

618-EB28D1-12C-EN
UNITS 4YCZ6024
*060
4YCZ6036
*070[*090]
4YCZ6048
*090[*115]
4YCZ6060
*115
F.L. Amps LOCATED ON UNIT NAMEPLATE
FILTER / FURNISHED NO
Type Recommended THROWAWAY
Recmd. Face Area (sq. ft) (g) 4.0 5.3
REFRIGERANT R-410A
Charge (lbs.) LOCATED ON UNIT NAMEPLATE
Subcooling LOCATED ON UNIT NAMEPLATE
(a) Certified in accordance with the Unitary Air-Conditioner Equipment certification program, which is based on AHRI Standard 210/240. Noise calculated in
accordance with AHRI Standard 270.
(b) Filters must be installed in return air stream. Square footages listed are based on 300 f.p.m. face velocity. If permanent filters are used size per
manufacturer's recommendation with a clean resistance of 0.05" W.C.
(c) Sound Power values are not adjusted for AHRI 270-95 tonal corrections
(d) All models are certified to UL 1995. Ratings shown are for elevations up to 2000 ft. For higher elevations reduce ratings at a rate of 4% per 1000 ft.
elevation.
(e) Convertible to LPG.
(f) This value is approximate. For more precise value, see Unit Nameplate.
(g) Standard Air - Dry Coil - Outdoor.
(h) Based on U.S. Government Standard Tests.
UNITS 4YCZ6036
*075[*096]
4YCZ6048
*096[120]
4YCZ6060
A3120C
RATED Volts/PH/Hz 208-230/3/60 - 3 PHASE
Performance Cooling BTUH (a) 35600 48000 57500
Indoor Airflow (CFM) 1175 1520 1950
Power Input (KW) LOCATED ON UNIT NAMEPLATE
EER H/L/SEER BTU/Watt-Hr (b) 12 / 13.6 / 16.6 12 / 13.5 / 16 11.4/ 12.65 /15.1
Sound Power Rating [dB(A)] (c) 70.0 71 73
PERFORMANCE HEATING (d)
Input BTUH-1st Stage 56250 [72000] 72000 [90000] 90000
Input BTUH-2nd Stage 75000 [96000] 96000 [120000] 120000
AFUE 79.5 [80] 80 80
Temp rise-Min/Max (F°) 30 / 60
[40 / 70]
30 / 60
[40 / 70] 30 / 60
Orifice Qty/Drill Size (Nat Gas)(e) 2 / #33
[3 / #37]
3 / #37
[3 / #32] 3 / #32
POWER CONN. — V/Ph/Hz 208-230/3/60 - 3 PHASE
Min. Brch. Cir. Ampacity (f) LOCATED ON UNIT NAMEPLATE
Fuse Size — Max/Rec (A) LOCATED ON UNIT NAMEPLATE
COMPRESSOR 2 STAGE SCROLL
VOLTS/PH/HZ 208-230/3/60 - 3 PHASE
R.L. Amps — L.R. Amps LOCATED ON UNIT NAMEPLATE
OUTDOOR COIL — TYPE SPINE FIN
Rows/F.P.I 2 / 24
Face Area (sq. ft.) 15.49 23.57 23.57
Tube Size (in.) 3/8
Refrigerant Control EXPANSION VALVE
INDOOR COIL — TYPE PLATE FIN
Rows/F.P.I 4/15
Face Area (sq. ft.) 3.54 5.0
Tube Size (in.) 3/8
Refrigeration Control EXPANSION VALVE
IInnttrroodduuccttiioonn,, UUnniitt IInnssppeeccttiioonn aanndd SSppeecciiffiiccaattiioonn

18-EB28D1-12C-EN 7
UNITS 4YCZ6036
*075[*096]
4YCZ6048
*096[120]
4YCZ6060
A3120C
Drain Conn. Size (in.) 3/4 FEMALE NPT
OUTDOOR FAN — TYPE PROPELLER
DIA. (IN.) 23.4 28.2 28.2
DRIVE/NO. SPEEDS DIRECT / 1
CFM @ 0.0 in. w.g. (g) 3000 4200 4700
Motor — HP/R.P.M 1/6 /830 1/6 /830 1/4 /830
Volts/Ph/Hz 208–230/1/60
F.L. Amps/L.R Amps LOCATED ON UNIT NAMEPLATE
INDOOR FAN — TYPE CENTRIFUGAL
Dia. x Width (in.) 10x10 11x10
Drive/No. Speeds DIRECT / VARIABLE
CFM @ 0.0 in. w.g. (h) SEE FAN PERFORMANCE TABLE
Motor — HP / R.P.M. 1/2 / VARIABLE 3/4 / VARIABLE 1 / VARIABLE
Volts/Ph/Hz 208–230/1/60 208-230/1/60 208–230/1/60
F.L. Amps LOCATED ON UNIT NAMEPLATE
FILTER / FURNISHED NO
Type Recommended THROWAWAY
Recmd. Face Area (sq. ft) (g) 4.0 5.3
REFRIGERANT R-410A
Charge (lbs.) LOCATED ON UNIT NAMEPLATE
Subcooling LOCATED ON UNIT NAMEPLATE
(a) Certified in accordance with the Unitary Air-Conditioner Equipment certification program, which is based on AHRI Standard 210/240. Noise calculated in
accordance with AHRI Standard 270.
(b) Filters must be installed in return air stream. Square footages listed are based on 300 f.p.m. face velocity. If permanent filters are used size per
manufacturer's recommendation with a clean resistance of 0.05" W.C.
(c) Sound Power values are not adjusted for AHRI 270-95 tonal corrections
(d) All models are certified to UL 1995. Ratings shown are for elevations up to 2000 ft. For higher elevations reduce ratings at a rate of 4% per 1000 ft.
elevation.
(e) Convertible to LPG.
(f) This value is approximate. For more precise value, see Unit Nameplate.
(g) Standard Air - Dry Coil - Outdoor.
(h) Based on U.S. Government Standard Tests.
UNITS 4YCZ6036
*075[*096]
4YCZ6048
*096[120]
4YCZ6060
*120
RATED Volts/PH/Hz 460 /3/60 - 3 PHASE
Performance Cooling BTUH (a) 35600 48000 57500
Indoor Airflow (CFM) 1175 1520 1950
Power Input (KW) LOCATED ON UNIT NAMEPLATE
EER H/L/SEER BTU/Watt-Hr (b) 12 / 13.6 / 16.6 12 / 13.8 / 16 11.4/ 12.65 /15.1
Sound Power Rating [dB(A)] (c) 70 71 73
PERFORMANCE HEATING (d)
Input BTUH-1st Stage 56250 [72000] 72000 [90000] 90000
Input BTUH-2nd Stage 75000 [96000] 96000 [120000] 120000
AFUE 79 [80] 80 80
Temp rise-Min/Max (F°) 30 / 60
[40 / 70]
30 / 60
[40 / 70] 30 / 60
Orifice Qty/Drill Size (Nat Gas)(e) 2 / #33
[3 / #37]
3 / #37
[3 / #32] 3 / #32
POWER CONN. — V/Ph/Hz 460 /3/60
Min. Brch. Cir. Ampacity (f) LOCATED ON UNIT NAMEPLATE
IInnttrroodduuccttiioonn,, UUnniitt IInnssppeeccttiioonn aanndd SSppeecciiffiiccaattiioonn

818-EB28D1-12C-EN
UNITS 4YCZ6036
*075[*096]
4YCZ6048
*096[120]
4YCZ6060
*120
Fuse Size — Max/Rec (A) LOCATED ON UNIT NAMEPLATE
COMPRESSOR 2 STAGE SCROLL
VOLTS/PH/HZ 460 /3/60
R.L. Amps — L.R. Amps LOCATED ON UNIT NAMEPLATE
OUTDOOR COIL — TYPE SPINE FIN
Rows/F.P.I 2 / 24
Face Area (sq. ft.) 15.49 23.57 23.57
Tube Size (in.) 3/8
Refrigerant Control EXPANSION VALVE
INDOOR COIL — TYPE PLATE FIN
Rows/F.P.I 4/15
Face Area (sq. ft.) 3.54 5.0
Tube Size (in.) 3/8
Refrigeration Control EXPANSION VALVE
Drain Conn. Size (in.) 3/4 FEMALE NPT
OUTDOOR FAN — TYPE PROPELLER
DIA. (IN.) 28.2 28.2 28.2
DRIVE/NO. SPEEDS DIRECT / 1
CFM @ 0.0 in. w.g. (g) 3000 4200 4700
Motor — HP/R.P.M 1/6 /830 1/6 /830 1/4 /830
Volts/Ph/Hz 460/1/60
F.L. Amps/L.R Amps LOCATED ON UNIT NAMEPLATE
INDOOR FAN — TYPE CENTRIFUGAL
Dia. x Width (in.) 10x10 11x10
Drive/No. Speeds DIRECT / VARIABLE
CFM @ 0.0 in. w.g. (h) SEE FAN PERFORMANCE TABLE
Motor — HP / R.P.M. 1/2 / VARIABLE 3/4 / VARIABLE 1 / VARIABLE
Volts/Ph/Hz 208–230/1/60 208-230/1/60 208–230/1/60
F.L. Amps LOCATED ON UNIT NAMEPLATE
FILTER / FURNISHED NO
Type Recommended THROWAWAY
Recmd. Face Area (sq. ft) (g) 4.0 5.3
REFRIGERANT R-410A
Charge (lbs.) LOCATED ON UNIT NAMEPLATE
Subcooling LOCATED ON UNIT NAMEPLATE
(a) Certified in accordance with the Unitary Air-Conditioner Equipment certification program, which is based on AHRI Standard 210/240. Noise calculated in
accordance with AHRI Standard 270.
(b) Filters must be installed in return air stream. Square footages listed are based on 300 f.p.m. face velocity. If permanent filters are used size per
manufacturer's recommendation with a clean resistance of 0.05" W.C.
(c) Sound Power values are not adjusted for AHRI 270-95 tonal corrections
(d) All models are certified to UL 1995. Ratings shown are for elevations up to 2000 ft. For higher elevations reduce ratings at a rate of 4% per 1000 ft.
elevation.
(e) Convertible to LPG.
(f) This value is approximate. For more precise value, see Unit Nameplate.
(g) Standard Air - Dry Coil - Outdoor.
(h) Based on U.S. Government Standard Tests.
IInnttrroodduuccttiioonn,, UUnniitt IInnssppeeccttiioonn aanndd SSppeecciiffiiccaattiioonn

18-EB28D1-12C-EN 9
Charging in Cooling above 55°F
OD Ambient
If servicing the equipment requires system evacuation,
then re-charge the system to the weight specified on
the nameplate Verify the system subcooling using the
Subcooling Charging Table and, if necessary, adjust
the charge using the procedure below
1 For best results — the indoor temperature should
be kept between 70°F to 80°F Add system heat if
needed
2 Whenever charge is removed or added, the system
must be operated for a minimum of 20 minutes to
stabilize before accurate measurements can be
made
3 Measure Liquid Line Temperature and Refrigerant
Pressure at service valved in the compressor
compartment
4 Locate your liquid line temperature in the left
column of the table, and the intersecting liquid line
pressure under the subcool value column, Add
refrigerant to raise the pressure to match the table,
or remove refrigerant to lower the pressure Again,
wait 20 minutes for the system conditions to
stabilize before adjusting charge again
NNoottee:: System char e shall never be more than 110% or
less than 90% of nameplate char e. If specified
subcoolin cannot be achieved within those
char e bounds, contact your Field Service
Representative.
5 When system is correctly charged, you can refer to
System Pressure Curves to verify typical
performance
CCHHAARRGGIINNGG BBEELLOOWW 5555°°FF
Evacuate system and weigh in nameplate charge or
use factory charge Correct subcooling may be verified
when the temperature is above 55°F
R-410A REFRIGERANT CHARGING CHART
Refer to Service Facts or Installer’s Guide for charging method
LIQUID
TEMP
(°F)
DESIGN SUBCOOLING (°F)
6 8 9 10 11 12 13 14 16
LIQUID GAGE PRESSURE (PSI)
55 174 179 182 185 188 191 195 198 205
60 189 195 198 201 204 208 211 215 222
65 205 211 215 218 222 225 229 232 240
70 222 229 232 236 240 243 247 251 259
75 240 247 251 255 259 263 267 271 279
80 259 267 271 275 279 283 287 291 301
85 279 287 291 296 300 304 309 313 323
90 301 309 313 318 322 327 331 336 347
95 323 331 336 341 346 351 355 360 371
100 347 355 360 365 370 376 381 386 398
105 371 381 386 391 396 402 407 413 425
110 398 407 413 418 424 429 435 441 454
115 425 435 441 446 452 458 464 470 484
120 454 464 470 476 482 488 495 501 516
125 484 495 501 507 514 520 527 533 549
From Dwg. D154557P01
IInnttrroodduuccttiioonn,, UUnniitt IInnssppeeccttiioonn aanndd SSppeecciiffiiccaattiioonn

10 18-EB28D1-12C-EN
Determine Unit Clearances
Figure 1. Space on Sides Requirements
DDDD
CC
EE D
BB
A
FF FRONT SIDE
LEFT SIDE
BOTTOM SIDE
TOP SIDE
W/ ECONOMIZER W/ ECONOMIZER
BACK SIDE 305 [12] 762 [30] 305 [12] 762 [30]
LEFT SIDE 762 [30] 914 [36] 914 [36] 1067 [42]
RIGHT SIDE 914 [36] - 914 [36] -
FRONT SIDE 1067 [42] - 1067 [42] -
BOTTOM
BACK SIDE
LEFT SIDE
RIGHT SIDE
FRONT SIDE
TOP
A
BB
CC
CENTER OF GRAVITY - TABLE NEXT PAGE
CENTER OF GRAVITY - TABLE NEXT PAGE
305 [12] 305 [12]
914 [36] 914 [36]
DIMENSIONS mm [Inches]
HEIGHT OF UNIT - TABLE NEXT PAGE
25 [1] 25 [1]
152 [6] 152 [6]
305 [12] 305 [12]
2 - 3 TON Units 4 - 5 TON Units
RECOMMENDED SERVICE CLEARANCE mm [Inches]
CLEARANCE TO COMBUSTIBLE MATERIAL mm [Inches]
0 0
DD -Depth
EE -Width
FF 498.90 [19-5/8] 575.06 [ 22-5/8]
1095.00 [43-1/18] 1169.92 [46-1/16]
1531.87 [60-5/16]
1284.99 [50-19/32]
D134.94 [5-5/16] 135.39 [5-11/32]
Note: The view labeled “Bottom side”
represents the base as viewed looking
up from underneath the unit.

18-EB28D1-12C-EN 11
Figure 2. ottom and ack Duct Openings
B
C
D
E
E
F
G
H
BOTTOM DUCT OPENINGS
I
J
J
K
L
M
N
BACK DUCT OPENINGS
BACK SIDE
RIGHT SIDE
903.29 [35 - 3/8]
1050.93 [41 - 3/8]
Height mm [in]
A -Height B C D E F G H I J K L M N
4YCZ6024 (060)
4YCZ6048 (115)
4YCZ6060
1355.64
[53.37]
381.00
[15.0]
88.21
[3.47]
449.02
[17.68]
176.07
[6.93]
331.54
[13.05]
372.82
[14.68]
176.07
[6.93]
184.29
[7.26]
296.62
[11.68]
1108.75
[43.50]
457.20
[18.0]
85.60
[3.37]
381.00
[15.0]
244.09
[9.61]
327.45
[12.89]
PHYSICAL DIMENSIONS mm [in]
304.80
[12.0]
75.41
[2.93]
406.40
[16.0]
167.89
[6.61]
180.20
[7.1]
380.21
[14.96]
79.50
[3.13]
398.22
[15.68]
84.12
[3.31]
W1 W2 W3 W4 BB CC
4YCZ6024 (060) 60.3 [133] 38.1 [84] 26.8 [59] 42.6 [94] 199.6 [440] 167.8 [370] 406.0 [16.0] 533.4 [21.0]
4YCZ6036 (075) 61.0 [134] 38.0 [84] 31.0 [69] 49.0 [107] 218.0 [481] 175.0 [385] 399.0 [15.7] 546.0 [21.5]
4YCZ6036 (115) 61.0 [134] 37.0 [81] 31.0 [69] 51.0 [113] 226.0 [498] 182.0 [402] 389.0 [15.3] 559.0 [22.0]
4YCZ6048 (090) 75.7 [167] 50.8 [112] 45.8 [101] 68.5 [151] 299.2 [659] 240.9 [531] 444.5 [17.5] 698.5 [27.5]
4YCZ6048 (115) 81.6 [180] 46.3 [102] 42.2 [93] 73.5 [162] 301.6 [665] 243.6 [537] 419.1 [16.5] 706.1 [27.8]
4YCZ6060 (120) 82.1 [181] 46.3 [102] 43.1 [95] 76.7 [169] 306.9 [676] 248.6 [548] 401.3 [15.8] 711.2 [28.0]
Corner Weights
KG/LBS
SHIPPING
WEIGHT
KG/LBS
UNIT
WEIGHT
KG/LBS
Center Of Gravity
mm[inch]
4YCZ6036 (096)
4YCZ6036 (075)
4YCZ6048 (090)
949.33 [37 - 3/8]
75.41
[2.93]
DDeetteerrmmiinnee UUnniitt CClleeaarraanncceess

12 18-EB28D1-12C-EN
Review Location and Recommendation Information
NNootteess::
• The unit is shipped for horizontal installation.
• Durin heatin operation, avoid supply air
below 80 de rees F or return air below 50
de rees F to prevent flue as condensation.
HHoorriizzoonnttaall AAiirrffllooww UUnniittss
1 Location of the unit must allow service clearance
around it to ensure adequate serviceability,
maximum capacity, and peak operating efficiency
2 These units are designed for outdoor installation
They may be installed directly on a slab, wood
flooring, or on Class A, B, or C roof covering
material The discharge air from the condenser fans
must be unrestricted for a minimum of 3 feet above
the unit
3 The louvers above and below the flue hood in the
side panel must have adequate clearance around
the air opening into the combustion area
4 Examine all flue product-carrying areas of the
furnace, its vent system, and the main burner for
safe operation
IImmppoorrttaanntt:: A minimum clearance of 0.0” to
combustible material shall be
maintained on air outlet duct.
5 Exhaust vents or other sources of contaminated air
must not be near the unit’s air inlet if outside air is
to be introduced as make-up air or a ventilation
feature is to be used Contamination from exhaust
vents or chimneys may also foul the condenser
causing degraded performance
6 Check the handling facilities to ensure the safety of
personnel and the unit(s)
7 The unit must be mounted level for proper drainage
of water through the drain holes in the base pan
8 The unit should not be exposed to direct roof water
runoff
9 Flexible duct connectors must be of a flame
retardant material All duct work outside of the
structure must be insulated and weatherproofed in
accordance with local codes
10 Holes through exterior walls or roof must be sealed
in accordance with local codes
11 All fabricated outdoor ducts should be as short as
possible
CClleeaarraanncceess
1 The recommended clearances for single-unit
installations are illustrated in “Determine Unit
Clearances,” p 10
2 Any reduction of the unit clearances indicated in
these figures may result in condenser coil
starvation or the recirculation of warm condenser
air Actual clearances, which appear to be
inadequate should be reviewed with a local
engineer
3 See the unit’s nameplate for the absolute minimum
clearance between the unit and any combustible
surfaces
DDoowwnn AAiirrffllooww UUnniittss
1 Location of the unit must allow service clearance
around it to ensure adequate serviceability,
maximum capacity, and peak operating efficiency
2 Refer to the Installation section for instruction on
converting the supply and return airflow covers to
down airflow
3 The field assembled Roof Mounting Curb
(BAYCURB050A or BAYCURB051A) or a field
fabricated curb should be in place before the unit is
hoisted to the roof top
The Roof Mounting Curb (frame) must be installed
on a flat, level section of the roof (maximum of 1/4"
per foot pitch) and provide a level mounting surface
for the unit Also, be sure to provide sufficient
height above the roof to prevent water from
entering the unit
4 Be sure the mounting curb spans structural
members (trusses) of the roof, thereby providing
sufficient support for the weight of the unit, the
curb, the duct(s), and any factory or field installed
accessories
5 The unit must be mounted level for proper drainage
of water through the drain holes in the base pan
6 Be sure the hole in the structure for the ducts is
large enough to accommodate the fabricated ducts
and the insulation surrounding them Flexible duct
connectors must be of a flame retardant material
All duct work outside of the structure must be
insulated and weatherproofed in accordance with
local codes
7 Holes through exterior walls or roof must be sealed
in accordance with local codes
8 These units are design certified for outdoor
installation They may be installed directly on a
slab, wood flooring, or on Class A, B, or C roof
covering material The discharge air from the
condenser fans must be unrestricted for a minimum
of 3 feet above the unit
9 The louvers above and below the flue hood in the
side panel must have adequate clearance around
the air opening into the combustion area
10 Examine all flue product-carrying areas of the
furnace, its vent system, and the main burner for
safe operation
IImmppoorrttaanntt:: A minimum clearance of 0.0” to
combustible material shall be maintained
on air outlet duct.

18-EB28D1-12C-EN 13
11 Exhaust vents or other sources of contaminated air
should not be near the unit’s air inlet if outside air is
to be introduced as make-up air or a ventilation
feature is to be used Contamination from exhaust
vents or chimneys may also foul the condenser
causing degraded performance
12 Check the handling facilities to ensure the safety of
personnel and the unit(s)
CClleeaarraanncceess
1 The recommended clearances for single-unit
installations are illustrated in “Determine Unit
Clearances,” p 10
2 Any reduction of the unit clearances indicated in
these figures may result in condenser coil
starvation or the recirculation of warm condenser
air Actual clearances, which appear to be
inadequate should be reviewed with a local
engineer
3 See the unit’s nameplate for the absolute minimum
clearance between the unit and any combustible
surfaces
RReevviieeww LLooccaattiioonn aanndd RReeccoommmmeennddaattiioonn IInnffoorrmmaattiioonn

14 18-EB28D1-12C-EN
Unit Installation
NNoottee:: The factory ships this unit for horizontal
installation.
Install Flue Hood
1 Locate the Flue Hood in the literature package
2 Remove the two Flue Hood mounting screws from
the unit They are located to the right of the Power
Entry connection panel
3 Attach the Flue Hood to the unit with the two
screws removed in step two Refer to “Determine
Unit Clearances,” p 10 for correct orientation of the
Flue Hood
Ground Level Installation
To install the unit at ground level:
1 Place the unit on a pad the size of the unit or larger
The unit must be mounted level for proper drainage
of water through the holes in the base pan To
attach the unit securely to the slab, use extreme
mounting kit, BAYEXMK003A
The pad must not come in contact with the
structure Be sure the outdoor portion of the supply
and return air ducts are as short as possible See,
Table 1, p 15
Unit requires vibration support as indicated in Table
3, p 16
2 The louvers above and below the Flue Hood in the
side panel must have adequate clearance around
the air opening into the combustion area
3 Location of the unit must allow service clearance
around it Clearance of the unit must be given
careful consideration See “Determine Unit
Clearances,” p 10
NNoottee:: Any reduction of the unit clearances indicated in
these illustrations may result in condenser coil
starvation or the recirculation of warm
condenser air. Actual clearances, which appear
to be inadequate should be reviewed with a local
en ineer.
IImmppoorrttaanntt:: A minimum clearance of 0.0" to
combustible material shall be maintained
on air outlet duct.
4 Attach the supply and return air ducts to the unit as
explained in the Ductwork Installation section
5 Flexible duct connectors must be of a flame
retardant material Insulate any ductwork outside of
the structure with at least two (2) inches of
insulation and weatherproof There must be a
weatherproof seal where the duct enters the
structure
6 Do not expose the unit to direct roof water runoff
7 Seal all holes through exterior walls in accordance
with local codes
8 Continue with the following installation sections to
complete the installation: “Ductwork, Gas Piping,
Filter and Electrical Wiring”
Rooftop Installation—Curb
Mounting
CCoonnvveerrtt HHoorriizzoonnttaall AAiirrffllooww ttoo DDoowwnn AAiirrffllooww
The factory ships the unit for horizontal airflow
Perform this procedure to convert it to down airflow:
1 Remove the three (3) sheet metal screws securing
the supply air cover and the four (4) sheet metal
screws securing the return air cover from the base
of the unit Remove the covers from the base See
Table 2, p 15
2 Place the covers over the horizontal supply and
return openings (painted side out) Align the screw
holes, and secure using the same screws removed
in step 1
Install Full Perimeter Roof Mounting
Curb
1 Verify that the roof mounting curb is correct for the
unit There are two curbs depending on the unit
cabinet sizes:
• 4YCZ6024 and 4YCZ6036 use model
BAYCURB050
• 4YCZ6048 and 4YCZ6060 use model
BAYCURB051
2 Assemble and install the curb following the
instructions in the Installer's Guide included with
the appropriate curb

18-EB28D1-12C-EN 15
Table 1. Typical Ground Level Application
Note: Use the extreme mounting kit, BAYEXMK003AA, to secure the unit to the slab.
SIDING
RETURN
AIR DUCT
SUPPLY
AIR DUCT
EXTERIOR
WALL INSULATE
WEATHERPROOF
OR RAIN SHIELD FLEXIBLE DUCT
CONNECTORS
OUTDOOR
AIR DISCHARGE
SUPPORT PAD
FOUNDATION
3/4” VIBRATION ISOLATORS, USE
7 ISOLATORS
Table 2. Converting Horizontal to Down Airflow
Lifting and Rigging
WWAARRNNIINNGG
IIMMPPRROOPPEERR UUNNIITT LLIIFFTT!!
FFaaiilluurree ttoo pprrooppeerrllyy lliifftt uunniitt ccoouulldd rreessuulltt iinn ddeeaatthh oorr
sseerriioouuss iinnjjuurryy oorr ppoossssiibbllee eeqquuiippmmeenntt oorr pprrooppeerrttyy--
oonnllyy ddaammaaggee
TTeesstt lliifftt uunniitt aapppprrooxxiimmaatteellyy 2244 iinncchheess ttoo vveerriiffyy
pprrooppeerr cceenntteerr ooff ggrraavviittyy lliifftt ppooiinntt TToo aavvooiidd
ddrrooppppiinngg ooff uunniitt,, rreeppoossiittiioonn lliiffttiinngg ppooiinntt iiff uunniitt iiss
nnoott lleevveell
IImmppoorrttaanntt:: Do not lift the unit without test liftin for
balance and ri in . Do not lift the unit in
windy conditions or above personnel. Do
not lift the unit by attachin clevis, hooks,
pins, or bolts to the unit casin , casin
hardware, corner lu s, an les, tabs, or
flan es. Failure to observe these warnin s
may result in equipment dama e.
1 Before preparing the unit for lifting, check the unit
dimension drawings for center of gravity for lifting
safety (“Determine Unit Clearances,” p 10)
Because of placement of internal components, the
unit’s weight may be unevenly distributed
UUnniitt IInnssttaallllaattiioonn

16 18-EB28D1-12C-EN
Approximate unit weights are also provided in the
unit drawings
NNoottee:: Unit ri in and hoistin requires accessory
kit BAYLIFT002BA. It includes a kit of four (4)
liftin lu s. See, Table 4, p. 17.
2 Insert the four lifting lugs in the openings provided
in the drip lip on each end of the unit A tap or jerk
to the lug will overcome the interference that arises
due to the dimple on the lug
3 When hoisting the unit, be sure that a proper
method of rigging is used Use slings and spreader
bars for protection during lifting Always test-lift the
unit to determine the exact unit balance and
stability before hoisting it to the installation
location
4 When the curb and air ducts have been properly
installed, the unit is ready to be hoisted to the roof
and set in position
IImmppoorrttaanntt::
• To prevent dama e to the sides and
top of the unit when hoistin , use
"spreader bars" as shown on Table
4, p. 17.
• The unit must be lowered into
position. The P.V.C. rubber tape on
the curb flan e permits the unit to
be repositioned if required without
destroyin the P.V.C. rubber seals
affixed to the mountin curb.
PPllaacciinngg tthhee UUnniitt oonn tthhee MMoouunnttiinngg CCuurrbb
1 The unit is designed with a perimeter drip lip that is
lower than the unit base pan, see Table 4, p 17
2 Position the unit drip lip down over and in contact
with the outside corner of the curb Continue to
lower the unit on top of the curb, with the unit drip
lip astraddle, and in contact with, both the end and
side rail of the curb The unit should now rest on
top of the curb Use the extreme mounting kit,
BAYEXMK001A, to add additional hold down
strength to the mounting
NNoottee:: The ductwork is installed as part of the curb
installation. Do not attach ductwork to the unit
and lower the unit with ductwork onto the curb.
Table 3. Vibration Isolators/Snow Feet Locations
Note: These views represent the base as
viewed looking up from underneath
the unit.
Important: Unit requires vibration isolator
support in the general areas
shown. Locate 3/4" thick
vibration isolators on the
bottom of the basepan as
illustrated by black dots for
ground level pad applications.
Modify vibration isolator
location as necessary for frame
and rail applications.
Small Cabinet
****4024 - 4036
Medium Cabinet
****4042 - 4060
Rooftop Installation — Frame
Mounting
For rooftop applications using field fabricated frame
and ducts use the following procedure:
1 Locate and secure the frame to the roof by bolting
or welding Frame must provide adequate center
support via a cross member centrally located
channel rail See, Table 6, p 18 and Table 7, p 19
Vibration isolators should be installed as indicated
in Table 3, p 16, adjust as necessary for your
frame The isolators must be placed on base pan,
not drip lip Add flashing as required Flashing must
conform to local building codes
2 Prepare the hole in the roof in advance of installing
the unit
3 Secure the horizontal or down airflow ducts to the
roof Refer to the previous Convert from Horizontal
Airflow to Down Airflow section if conversion is
needed
4 All fabricated outdoor ducts should be as short as
possible
5 Place the unit on the frame
6 The unit must be mounted level for proper drainage
of water through the holes in the base pan
7 Secure the unit to the frame
8 Insulate any ductwork outside of the structure with
at least two (2) inches of insulation and then
UUnniitt IInnssttaallllaattiioonn

18-EB28D1-12C-EN 17
weatherproof There must be a weatherproof seal
where the duct enters the structure
9 The unit should not be exposed to direct roof water
runoff
10 Flexible duct connectors must be of a flame
retardant material All duct work outside of the
structure must be insulated and weatherproofed in
accordance with local codes
11 Access and service clearances for the unit must be
given careful consideration when locating the duct
entrance openings “Determine Unit
Clearances,” p 10 provide unit dimensions
12 Continue with the following installation sections to
complete the installation: Ductwork, Filter, and
Electrical Wiring
Rooftop Installation — No Curb/
Frame
For roof top applications using field fabricated ducts
and sleeper rails rather than a curb or frame, use the
following procedure:
1 Locate and secure the sleeper rails to the roof by
bolting (three (3) rails required) One on each end to
support the edges of the unit and one across the
center of the unit The center rail must run inside
both drip lips Vibration isolators should be
installed, adjust as necessary for your sleeper rails
The isolators must be placed on base pan, not drip
lip Add flashing as required Flashing must
conform to local building codes
2 Prepare the hole in the roof in advance of installing
the unit
3 Secure the horizontal or down airflow ducts to the
roof Refer to the previous Convert from Horizontal
Airflow to Down Airflow section if conversion is
needed
4 All fabricated outdoor ducts should be as short as
possible
5 Place the unit on the rails
6 The unit must be mounted level for proper drainage
of water through the holes in the base pan
7 Secure the unit to the rails
8 Insulate any ductwork outside of the structure with
at least two (2) inches of insulation and then
weatherproof There must be a weatherproof seal
where the duct enters the structure
9 No exposure to direct roof water runoff
10 Flexible duct connectors must be of a flame
retardant material All duct work outside of the
structure must be insulated and weatherproofed in
accordance with local codes
11 Access and service clearances for the unit must be
given careful consideration when locating the duct
entrance openings “Determine Unit
Clearances,” p 10 provide unit dimensions
12 Continue with the following installation sections:
“Ductwork, Filter and Electrical Wiring”
Table 4. Lifting and Rigging
Base of unit
rest on top of
curb rails
Drip lip on
perimeter of
unit
Spreader Bars
Gasket Seal
Drip Lip
Dimple
BAYLIFT002A
Lifting Lugs
UUnniitt IInnssttaallllaattiioonn

18 18-EB28D1-12C-EN
Table 5. Curb Dimensions
This drawing was prepared by the manufacturer in order to provide detail regarding job layout only. This drawing is not intended to be used as a
basis to construct, build or modify the item depicted in the drawing. The manufacturer is not responsible for the unauthorized use of this
drawing and expressly disclaims any liability for damages resulting from such unauthorized use.
Table 6. Typical Rooftop Horizontal Airflow Application with Frame
Supply Air
Return Air
Roof Flashing
Channel Iron Center
Support (Center Support
required on all frame
applications).
Angle Iron Frame
UUnniitt IInnssttaallllaattiioonn

18-EB28D1-12C-EN 19
Table 7. Typical Rooftop Down Airflow Application with Frame
Return Air
Roof Flashing
Channel Iron Center Support
(center support required on all
frame applications). Angle Iron Frame
Roof
Flashing
Supply
Air
Ductwork Installation
Attaching Downflow Ductwork to Roof
Curb
Supply and return air flanges are provided on the roof
curb for easy duct installation All ductwork must be
run and attached to the curb before the unit is set into
place
Attaching Downflow Ductwork to Roof
Frame
Follow these guidelines for ductwork construction:
Connections to the unit should be made with three (3)
inch canvas connectors to minimize noise and vibration
transmission
Elbows with turning vanes or splitters are
recommended to minimize air noise and resistance
The first elbow in the ductwork leaving the unit should
be no closer than two (2) feet from the unit, to minimize
noise and resistance
To prevent leaking, do not attach the ductwork to the
bottom of the unit base Refer to the bottom example in
the Figure 3, p 19
Figure 3. Attaching Down Airflow Ductwork
FIELD DUCT
UNIT DUCT
FLANGE
UNIT BASE
AIR PROOF
THIS SEAM
FIELD DUCT
UNIT DUCT
FLANGE UNIT BASE
AIR PROOF
THIS SEAM
FIELD
DUCT
UNIT DUCT FLANGE
UNIT BASE
AIR PROOF
THIS SEAM
FIELD DUCT
UNIT DUCT
FLANGE
UNIT BASE
NOT RECOMMENDED
WATERPROOF SEAM
WITH BUTYL OR
SILICONE
UUnniitt IInnssttaallllaattiioonn

20 18-EB28D1-12C-EN
Attaching Horizontal Ductwork to Unit
All conditioned air ductwork should be insulated to
minimize heating and cooling duct losses Use a
minimum of two (2) inches of insulation with a vapor
barrier The outside ductwork must be weatherproofed
between the unit and the building
When attaching ductwork to a horizontal unit, provide a
flexible watertight connection to prevent noise
transmission from the unit to the ducts The flexible
connection mmuusstt be indoors and made out of heavy
canvas
NNoottee:: Do not draw the canvas taut between the solid
ducts.
Figure 4. Attaching Horizontal Airflow Ductwork
FIELD DUCT
UNIT EXTERIOR
WEATHERPROOF
THIS SEAM
FIELD DUCT
UNIT EXTERIOR
WEATHERPROOF
THIS SEAM
Condensate Drain Piping
A 3/4-inch female NPT condensate drain connection is
provided on the evaporator access panel end of the
unit Provide a trap and fill it with water before starting
the unit to avoid air from being drawn through Follow
local codes and standard piping practices when
running the drain line Pitch the line downward away
from the unit Avoid long horizontal runs See Figure
5, p 20
NNoottee:: Do not use reducin fittin s in the drain lines.
The condensate drain must be:
• Made of 3/4” pipe size
• Pitched 1/4” per foot to provide free drainage to
convenient drain system
• Trapped
• Must be connected to a closed drain system unless
the trap is properly vented
Figure 5. Typical Condensate Drain Piping
3/4" PVC OR COPPER
TUBING AND FITTINGS
1-1/2" MIN.
1-1/2" MIN.
Gas Piping Installation
WWAARRNNIINNGG
FFIIRREE OORR EEXXPPLLOOSSIIOONN HHAAZZAARRDD!!
FFaaiilluurree ttoo ffoollllooww tthhee ssaaffeettyy wwaarrnniinngg eexxaaccttllyy ccoouulldd
rreessuulltt iinn sseerriioouuss iinnjjuurryy,, ddeeaatthh,, oorr pprrooppeerrttyy
ddaammaaggee
UUssee aa ccoommmmeerrcciiaallllyy aavvaaiillaabbllee ssooaapp ssoolluuttiioonn mmaaddee
ssppeecciiffiiccaallllyy ffoorr tthhee ddeetteeccttiioonn ooff lleeaakkss ttoo cchheecckk aallll
ccoonnnneeccttiioonnss
IImmppoorrttaanntt:: Before makin the as pipe connection,
ive serious consideration to providin the
clearance necessary to remove the access
panels on the unit (e. ., economizer and
filter access panels).
NNoottee:: In the absence of local codes, the installation
must conform with American National Standard–
Z223.1–National Fuel Gas Code, Latest Revision.
The available gas supply must agree with the required
gas supply marked on the unit nameplate Minimum
permissible gas supply pressure for purpose of input
adjustment must be at least 7 0 in w c (inches water
column) for natural gas and 11 in w c for LP Gas
PPiippee DDeelliivveerryy SScchheedduullee
NNoottee:: The followin procedure and tables apply to
Natural Gas oonnllyy.
1 Obtain from the gas company the heating value and
specific gravity of the gas delivered
2 Determine the exact length of pipe needed
3 Read BTUH input nameplate on the furnace
4 Use the multiplier opposite the specific gravity of
the gas given in Multiplier Table and insert in the
following formula:
Furnace Input in BTUH
Gas Heat Contne in BTU/Cu. Ft. X Multiplier
CFH =
5 Use the Table 9, p 21 and select the pipe length
nearest to calculated size
6 Follow this line vertically down to the exact CFH
found in Step 4 above or the next highest value
7 Read horizontally to the left of this column for the
required pipe size diameter
Table 8. Specific Gravity Multiplier
SPECIFIC
GRAVITY MULTIPLIER
MULTIPLIERS TO BE USED
WHEN THE SPECIFIC GRAVITY
OF THE GAS IS OTHER THAN
0.060
0.50 1.10
0.55 1.04
0.60 1.00
0.65 0.962
NNoottee:: If this is an LP Gas application, consult your LP
Gas supplier for pipe sizes and deliveries.
UUnniitt IInnssttaallllaattiioonn