Trane 4YCC4024A1060A Assembly instructions

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
June 2020 1188--EEBB3311DD11--11FF--EENN
Single Packaged Gas/Electric
14 SEER Convertible, 2 — 5 Ton
4YCC4024A1060A
4YCC4030A1070A
4YCC4036A1070A
4YCC4036A1090A
4YCC4042A1060A
4YCC4042A1090A
4YCC4048A1070A
4YCC4048A1090A
4YCC4060A1090A
4YCC4060A1115A
Installer’s G ide

©2020 18-EB31D1-1F-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
WWAARRNNIINNGG
HHAAZZAARRDDOOUUSS GGAASSEESS!!
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PPrrooppoossiittiioonn 6655
WWAARRNNIINNGG
HHAAZZAARRDDOOUUSS VVOOLLTTAAGGEE!!
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pprrooppeerrttyy ddaammaaggee,, sseevveerree ppeerrssoonnaall iinnjjuurryy,, oorr
ddeeaatthh
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ssttrraappss,, cclliippss,, nnuuttss,, oorr wwaasshheerrss uusseedd ttoo ccoommpplleettee aa
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WWAARRNNIINNGG
UUNNIITT CCOONNTTAAIINNSS RR--441100AA
RREEFFRRIIGGEERRAANNTT!!
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eeqquuiippmmeenntt ddaammaaggee oorr ppeerrssoonnaall iinnjjuurryy
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2222 PPrrooppeerr sseerrvviiccee eeqquuiippmmeenntt iiss rreeqquuiirreedd SSeerrvviiccee
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ccoommpprreessssoorr ooiill
WWAARRNNIINNGG
SSAAFFEETTYY HHAAZZAARRDD!!
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pprrooppeerrllyy iinnssttaalllleedd mmaayy rreessuulltt iinn sseevveerree ppeerrssoonnaall
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ppllaaccee
WWAARRNNIINNGG
WWAARRNNIINNGG!!
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iinncclluuddiinngg lleeaadd,, wwhhiicchh aarree kknnoowwnn ttoo tthhee SSttaattee ooff
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ttoo wwwwww PP6655WWaarrnniinnggss ccaa ggoovv
IImmppoorrttaanntt:: Wear appropriate gloves, arm sleeve
protectors and eye protection when
servicing or maintaining this equipment.
IImmppoorrttaanntt:: Air filters and media wheels or plates shall
meet the test requirements in UL 900.

18-EB31D1-1F-EN 3
Introduction 4
Step 2 — Determine Unit Clearances 5
Step 3 — Review Location and
Recommendation Information 11
Step 4 — Unit Installation 13
Electrical Wiring 23
Field Wiring Diagram 25
Step 5 — Unit Startup 26
Sequence of Operation 28
Service Maintenance 28
Table of Contents

418-EB31D1-1F-EN
Introd ction
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 This unit is listed by
Underwriters Laboratory 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 LPG conversion kit is available A high
altitude installation kit of additional orifice sizes 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
The indoor fan motor speed adjustment is provided in
the Maintenance section
This guide is organized as follows:
• Step 1 — Inspect Shipment
• Step 2 — Determine Unit Clearances
• Step 3 — Review Location & Recommendation
Information
• Step 4 — Unit Installation
• Step 5 — Unit Startup
• Sequence of Operation
• Maintenance
SStteepp 11 —— IInnssppeecctt SShhiippmmeenntt
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:: o prevent damage to the sides and top of
the unit when hoisting, use “spreader
bars”.
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
• 4YCC4024–4036 use model BAYCURB050A
• 4YCC4042–4060 use model BAYCURB051A
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.
NNoottee:: he packaged units have been evaluated in
accordance with the Code of Federal Regulations,
Chapter XX, Part 3280 or the equivalent.
“SUI ABLE FOR MOBILE HOME USE”.

18-EB31D1-1F-EN 5
Step 2 — Determine Unit Clearances
Fig re 1. 4YCC4024–4036
Note: The view labeled “Bottom side”
represents the base as viewed looking
up from underneath the unit.
1049.02
[41-5/16]

618-EB31D1-1F-EN
Fig re 2. 4YCC4024–4036
BA C
4YCC4024 (060)
4YCC4030 (070)
4YCC4036 (070)
4YCC4036 (090)
Height mm/in Flu Hood w/brkt
mm/in Approx. Corner Weight - kg / lbs
D W1 W2 W3 W4
Shipping
Weight
kg/lbs
Total Unit
Weight
kg/lbs
Center of Gravity mm/in
898.53 [35-3/8]
898.53 [35-3/8]
949.33 [37-3/8]
949.53 [37-3/8]
157.16 [6-3/16]
157.16 [6-3/16]
157.16 [6-3/16]
58.3 [129]
61.3 [135]
61.1 [134]
61.7 [136]
36.8 [81]
38.7 [85]
38.3 [84]
38.9 [86]
26.1 [58]
27.5 [61]
27.1 [60]
27.7 [61]
41.0 [90]
43.1 [95]
43.2 [95]
43.7 [96]
196.1 [432]
204.8 [451]
203.4 [438]
205.7 [453]
479.8 [18.9]162.4 [358]
171.1 [377]
169.7 [374]
172.0 [379]
406.5 [16.0]
414.3 [16.3]
414.3 [16.3]
527.8 [20.8]
594.1 [23.4]
697.6 [27.5]
697.6 [27.5]
157.16 [6-3/16]
SStteepp 22 —— DDeetteerrmmiinnee UUnniitt CClleeaarraanncceess

18-EB31D1-1F-EN 7
Fig re 3. 4YCC4024–4036
SStteepp 22 —— DDeetteerrmmiinnee UUnniitt CClleeaarraanncceess

818-EB31D1-1F-EN
Fig re 4. 4YCC4042–4060
Note: The view labeled
“Bottom Side” represents
the base as viewed looking
up from underneath the unit.
SStteepp 22 —— DDeetteerrmmiinnee UUnniitt CClleeaarraanncceess

18-EB31D1-1F-EN 9
Fig re 5. 4YCC4042–4060
BA C
4YCC4042 (060)
4YCC4042 (090)
4YCC4048 (070)
4YCC4048 (090)
Height mm/in Approx. Corner Weight - kg / lbs
W1 W2 W3 W4
Shipping
Weight
kg/lbs
Total Unit
Weight
kg/lbs
Center of Gravity mm/in
898.53 [35-3/8]
898.53 [35-3/8]
71.2 [157]
71.8 [158]
71.4 [157]
72.0 [159]
46.6 [103]
47.2 [104]
44.6 [98]
45.0 [99]
34.6 [76]
35.2 [78]
33.2 [73]
33.8 [75]
53.1 [117]
53.6 [118]
53.9 [119]
54.4 [120]
252.2 [555]
254.5 [561]
250.3 [552]
252.6 [557]
470.0 [18.5]202.0 [452]
207.3 [457]
202.1 [448]
205.4 [453]
470.0 [18.5]
433.0 [17.0]
433.0 [17.0]
731.0 [28.8]
731.0 [28.8]
743.3 [29.3]
743.3 [29.3]
4YCC4060 (090)
4YCC4060 (115)
1000.13 [39-3/8]
1000.13 [39-3/8]
77.1 [170]
78.0 [172]
45.8 [101]
46.3 [102]
34.4 [76]
34.9 [77]
58.3 [128]
59.0 [130]
263.1 [580]
265.8 [586]
215.9 [476]
218.6 [482]
433.0 [17.0]
414.0 [16.3]
743.3 [29.3]
635.0 [25.0]
Model
1000.13 [39-3/8]
1000.13 [39-3/8]
SStteepp 22 —— DDeetteerrmmiinnee UUnniitt CClleeaarraanncceess

10 18-EB31D1-1F-EN
Fig re 6. 4YCC4042–4060
SStteepp 22 —— DDeetteerrmmiinnee UUnniitt CClleeaarraanncceess

18-EB31D1-1F-EN 11
Step 3 — Review Location and Recommendation
Information
NNoottee:: he unit is shipped for horizontal installation.
NNoottee:: During heating operation, avoid supply air below
80 degrees F or return air below 50 degrees F to
prevent flue gas 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 Figures 1 to 6
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

12 18-EB31D1-1F-EN
IImmppoorrttaanntt:: A minimum clearance of 0.0” to
combustible material shall be maintained
on air outlet duct.
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 Figures 1 to 6
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
SStteepp 33 —— RReevviieeww LLooccaattiioonn aanndd RReeccoommmmeennddaattiioonn IInnffoorrmmaattiioonn

18-EB31D1-1F-EN 13
Step 4 — Unit Installation
NNoottee:: he factory ships this unit for horizontal
installation.
IInnssttaallll FFlluuee HHoooodd
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
TToo IInnssttaallll tthhee uunniitt aatt ggrroouunndd lleevveell::
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 The
unit requires vibration support as indicated in the
Ground Level Application Figure
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 Figures 1 to 6
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
engineer.
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
RRooooffttoopp IInnssttaallllaattiioonn —— CCuurrbb MMoouunnttiinngg
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
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
IInnssttaallll FFuullll PPeerriimmeetteerr RRooooff MMoouunnttiinngg CCuurrbb
1 Verify that the roof mounting curb is correct for the
unit There are two curbs depending on the unit
cabinet sizes:
• 4YCC4024 through 4YCC4036 use model
BAYCURB050A
• 4YCC4042 through 4YCC4060 use model
BAYCURB051A
2 Assemble and install the curb following the
instructions in the Installer's Guide included with
the appropriate curb

14 18-EB31D1-1F-EN
Fig re 7. Typical Gro nd Level Application
NNoottee:: 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
Fig re 8. Converting Horizontal to Down Airflow
LLiiffttiinngg aanndd RRiiggggiinngg
IImmppoorrttaanntt:: Do not lift the unit without test lifting for
balance and rigging. Do not lift the unit in
windy conditions or above personnel. Do
not lift the unit by attaching clevis, hooks,
pins, or bolts to the unit casing, casing
hardware, corner lugs, angles, tabs, or
flanges. Failure to observe these warnings
may result in equipment damage.
1 Before preparing the unit for lifting, check the unit
dimension drawings for center of gravity for lifting
safety (Figures 1 to 6) Because of placement of
internal components, the unit’s weight may be
unevenly distributed Approximate unit weights are
also provided in the unit drawings
NNoottee:: Unit rigging and hoisting requires accessory kit
BAYLIF 002A. It includes a kit of four (4) lifting
lugs.
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
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn

18-EB31D1-1F-EN 15
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:: o prevent damage to the sides and top of
the unit when hoisting use “spreader
bars”.
IImmppoorrttaanntt:: he unit must be lowered into position. he
P.V.C. rubber tape on the curb flange
permits the unit to be repositioned if
required without destroying the P.V.C.
rubber seal affixed to the mounting 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
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:: he 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 1. 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
RRooooffttoopp IInnssttaallllaattiioonn —— FFrraammee MMoouunnttiinngg
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 4, p 17 and Table 5, p 18
Vibration isolators should be installed as indicated
in Table 1, p 15, 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
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 Figures 1 to 6 provide unit
dimensions
12 Continue with the following installation sections to
complete the installation: Ductwork, Filter, and
Electrical Wiring
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn

16 18-EB31D1-1F-EN
RRooooffttoopp IInnssttaallllaattiioonn —— FFllaatt RRooooff--NNoo CCuurrbb//FFrraammee
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 Figures 1 to 6 provide unit
dimensions
12 Continue with the following installation sections:
Ductwork, Filter and Electrical Wiring
Table 2. 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
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn

18-EB31D1-1F-EN 17
Table 3. C rb 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 4. 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
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn

18 18-EB31D1-1F-EN
Table 5. 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
DDuuccttwwoorrkk IInnssttaallllaattiioonn
AAttttaacchhiinngg DDoowwnnffllooww DDuuccttwwoorrkk ttoo RRooooff CCuurrbb
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
AAttttaacchhiinngg DDoowwnnffllooww DDuuccttwwoorrkk ttoo RRooooff FFrraammee
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
Figure 9, p 18
Fig re 9. Attaching Down Airflow D ctwork
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
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18-EB31D1-1F-EN 19
AAttttaacchhiinngg HHoorriizzoonnttaall DDuuccttwwoorrkk ttoo UUnniitt
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.
Fig re 10. Attaching Horizontal Airflow D ctwork
FIELD DUCT
UNIT EXTERIOR
WEATHERPROOF
THIS SEAM
FIELD DUCT
UNIT EXTERIOR
WEATHERPROOF
THIS SEAM
CCoonnddeennssaattee DDrraaiinn PPiippiinngg
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
NNoottee:: Do not use reducing fittings 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
Fig re 11. Typical Condensate Drain Piping
3/4" PVC OR COPPER
TUBING AND FITTINGS
1-1/2" MIN.
1-1/2" MIN.
GGaass PPiippiinngg IInnssttaallllaattiioonn
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 making the gas pipe connection,
give serious consideration to providing the
clearance necessary to remove the access
panels on the unit (e.g., 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:: he following 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:
5 Use the Natural Gas Only table and select the pipe
length nearest to calculated size
Furnace Input in BTUH
Gas Heat Contne in BTU/Cu. Ft. X Multiplier
CFH =
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 6. Specific Gravity M ltiplier
SPECIFIC
GRAVITY MULTIPLIER
MULTIPLIERS TO BE USED
WHEN THE SPECIFIC GRAVITY
OF THE GAS IS OTHER THAN
0.060
.50 1.10
.55 1.04
.60 1.00
.65 .962
NNoottee:: If this is an LP Gas application, consult your LP
Gas supplier for pipe sizes and deliveries.
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn

20 18-EB31D1-1F-EN
Table 7. Nat ral Gas Only
TABLE OF CUBIC FEET PER HOUR OF GAS FOR VARIOUS PIPE
SIZES AND LENGTHS
PIPE
SIZE
(inch) 10 20 30 40 50 60 70
1/2 132 92 73 63 56 50 46
3/4 278 190 152 130 115 105 96
1 520 350 285 245 215 195 180
1–1/4 1050 730 590 520 440 400 370
THIS TABLE IS BASED ON PRESSURE DROP OF 0.3 INCH W.C.
AND 0.6 SP.GR. GAS
GGaass PPrreessssuurree SSeett--uupp PPrreeccaauuttiioonnss
IImmppoorrttaanntt:: Do not connect gas piping to the unit until a
line pressure test has been completed. his
unit should never be exposed to gas line
pressure in excess of 14 inches water
column (1/2 PSIG). he furnace and its
equipment shutoff valve must be
disconnected from the gas supply piping
system during any pressure testing of that
system at test pressures in excess of 1/2
psi.
The furnace must be isolated from the gas supply
piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply
piping system at test pressures less than or equal to 1/2
psig (3 48 kPa)
GGaass SSuuppppllyy LLiinnee PPrreessssuurree
Before connecting the unit to the gas supply line, be
sure to determine the gas pressure in the line
If the gas supply pressure is excessive (above 14 inches
water column or 1/2 psig), install a pressure regulator
either at the supply source or in the branch circuit
serving the unit Once the regulator is installed, set it to
provide a pressure of 7 inches water column with the
unit operating and no greater than 14 inches water
column with the unit not firing
NNoottee:: Gas pressure in excess of 14 inches water
column (1/2 psig) may damage the regulator,
while improper regulation may result at
pressures lower than 5.5 inches water column at
the unit inlet.
If the supply line pressure is below the minimum
supply pressure indicated on the unit nameplate,
contact the gas supply company
Follow these steps to complete the installation of the
unit gas piping See Table 8, p 20
NNoottee:: he shut-off gas cock must be installed outside
of the unit and should meet the specifications of
all applicable national and local codes.
Table 8. Gas Pipe
DEALER INSTALLED
GROUND UNION
1/8" N.P.T.PLUGGED
ACCESS FOR TEST
GAUGE CONNECTION
FROM
GAS SUPPLY
FIELD SUPPLIED MAIN
GAS VALVE, MUST BE
INSTALLED BY DEALER
OUTSIDE OF UNIT.
UNIT
TO MAIN
CONTROL
VALVE
6"
MIN
DRIP LEG
(6" MIN)
NNoottee:: he shut-off gas cock must be installed outside
of the unit and should meet the specifications of
all applicable national and local code.
1 Install a ground union joint downstream of the
shut-off cock This joint must also be installed
outside of the unit
2 Install a drip leg at least six (6) inches in depth next
to the union as shown in This drip leg is required
to collect any sediment that may be deposited in
the line
3 Before connecting the piping circuit to the unit,
bleed the air from the supply line and then cap or
plug the line and test the pressure at the tapped
shut-off cock The pressure reading should not
exceed 13 8 inches water column
4 Using an appropriate backup wrench on the gas
valve inlet boss, connect the gas piping to the unit
Check the completed piping for leaks using a soap
and water solution or the equivalent
5 After installation of the gas pipe in the unit, the pipe
opening should be closed with the filler/barrier plug
provided
VVeerriiffyy MMaanniiffoolldd PPrreessssuurree
Check the manifold pressure at the unit gas valve Do
not exceed the recommended pressure shown on the
unit nameplate See for connections Refer to Manifold
Pressure Check and Adjust in the following Step 5-Unit
Startup section if adjustment is needed
IInnppuutt CChheecckk aanndd AAddjjuussttmmeenntt
1 Make sure all gas appliances are off except the
furnace
2 Clock the gas meter with the furnace operating
(determine the dial rating of the meter) for one
revolution
3 Match the “Sec” column in the Gas Flow (in cfh)
Table 9, p 21 with the time clocked
4 Read the “Flow” column opposite the number of
seconds clocked
5 Table 9, p 21 lists values for a 2 cubic foot dial For
1, 1/2, or 5 Cu Ft dials use the following
conversions:
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn