TRANE Package Units(both Units Combined) Manual L0904648

User Manual: TRANE TRANE Package Units(both units combined) Manual TRANE Package Units(both units combined) Owner's Manual, TRANE Package Units(both units combined) installation guides

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I STALLATIO
OPERATION
NTE
CE

YCZ-|OIVI-1G
18-EB21 D4-8
Library

Service Literature

Product Section

Unitary

r°duct_.....................................................................................................................
Packaged Gas/E!ect[!c
Model
YCZ
Literature Type

Installation,

Operation,

Maintenance

Sequence

ALL phases of this installation must comply with
NATIONAL, STATE AND LOCAL CODES

Date
File No.

May 2004
SV-UN-RT-YCZ-IOM-1G
5/04

Supercedes

New

Model"
YCZ036Fl/3MOB,
YCZ050FI/3HOA,
YCZ060FI/3MOB,

Single Package Two Stage
Gas/Electric
16 SEER
Convertible
3, 4, 5 Ton

4MOA
4HOA
4MOA

BAYLIFT002A
LIFTING LUG KIT
IMPORTANT--

This Document

is customer

property

and is to remain with this unit. Please return to service information

All phases of this installation must comply with the NATIONAL, STATE & LOCAL CODES.
tion must conform with National Electric Code -- ANSI/NFPA 70 or "LATEST REVISION."

pack upon completion

of work.

In the absence of local codes, the installa-

Since Trane has a policy of continuous product and product data improvement,
it reserves the right to change design and specification without notice.
© 2004 American

Standard

5/04

GENERAL
IMPORTANT:

Read this entire
beginning

kWARNING:

manual

installation

INFORMATION

before

procedures.

BOD,LY
,NJURY
CAN
RESU'T
FROM

HIGH VOLTAGE ELECTRICAL COMPONENTS, FAST MOVING FANS,
AND COMBUSTIBLE GAS. FOR PROTECTION FROM THESE
INHERENT HAZARDS DURING INSTALLATION AND SERVICING,
THE ELECTRICAL SUPPLY MUST BE DISCONNECTED AND THE
MAIN GAS VALVE MUST BE TURNED OFF. IF OPERATING CHECKS
MUST BE PERFORMED WITH THE UNIT OPERATING, IT IS THE
TECHNICIANS RESPONSIBILTY TO RECOGNIZE THESE HAZARDS
AND PROCEED SAFELY.
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.
As shipped from the factory, this unit is for use with natural gas
only, and is listed by Underwriters Laboratory.
Model YCY-F heating/cooling
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-22
as
shipped.

IMPORTANT: DO NOT CONNECT GAS PIPING TO THE UNIT
UNTIL A LINE PRESSURE TEST HAS BEEN COMPLETED.
DAMAGE TO THE GAS VALVE MAY RESULT IN AN UNSAFE
CONDITION. THIS UNIT SHOULD NEVER BE EXPOSED TO
GAS LINE PRESSURE IN EXCESS OF 14 INCHES WATER
COLUMN. (1/2 PSIG)
IMPORTANT:
RECONNECT ALL GROUNDING DEVICES.
ALL PARTS OF THIS PRODUCT CAPABLE OF CONDUCTING
ELECTRICAL CURRENT ARE GROUNDED. IF GROUNDING
WIRES, SCREWS, STRAPS, CLIPS NUTS OR WASHERS
USED TO COMPLETE A PATH TO GROUND ARE REMOVED
FOR SERVICE, THEY MUST BE RETURNED TO THEIR ORIGINAL POSITION AND PROPERLY FASTENED.
IMPORTANT: ALL POWER LEGS MAY NOT BE BROKEN BY
CONTACTORS. SEE WIRING DIAGRAM ON UNIT CONTROL
BOX COVER.
THIS UNIT, AS SHIPPED FROM THE
SIGNED FOR NATURAL GAS ONLY.

iMPORTANT:
when hoisting
top).

The use of "spreader
bars" is required
the unit (to prevent damage to sides and

warning

complies

with State of California

,&WARNING:

law, Proposition

Nazardous
Gasses

This product must be gas piped by a Licensed Plumber
Gas Fitter in the Commonwealth
of Massachusetts.

3. Check to be sure the refrigerant charge has been retained
during shipment. Access to 1/4" flare pressure taps may be
gained by removing the furnace compartment access panel.

NOTICE

_WARNING:

and Cautions

appear at appropriate locations
Read these carefully.

Indicates a potentially

hazardous

throughout

this manual.

situation which, if not avoided,

could

result in death or serious injury.
_CAUTION"

Indicates

a potentially

hazardous

situation which, if not avoided,

result in minor or moderate injury. It may also be used to alert against
and where property-damage-only
accidents could occur.
Page 2

65.

Exposure to fuel substances
or by-products
of incomplete
fuel combustion
is believed by the state of California to
cause cancer, birth defects, or other reproductive
harm.

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.

Warnings

IS DE-

BEFORE STARTING THE COMPRESSOR, THE CRANKCASE
HEATER SHOULD BE ENERGIZED FOR EIGHT HOURS

The following

INSPECTION
1. Checkfor damage after the unit is unloaded. Report promptly,
to the carrier, any damage found to the unit. Do not drop the
unit.

FACTORY,

may

unsafe practices

or I

TYPICAL

ROOFTOP

iNSTALLATiON
(YCZ036,050,060F

WiTH FULL

PERIMETER

CURBS

Models)

FIELD SUPPLIED
SUPPORTS
AT EACH END
OF CURB

FIELD
SUPPLIED
CANT
STRIP

FIELD
SUPPLIED
RIGIDINSULATION

ROOFMOUNTING
CURB

SUPPLY

DUCT

TYPICAL

ROOFTOP

AIR

iNSTALLATiON
(YCZ036,050,060F

RETURN

AIR

DUCT

WiTH BAYCURB030A,038A
Models)

I
.J

SEE

NOTE1

SEE NOTE 2

FIELD SUPPLIED
SUPPORTS
AT EACH
END
OFCURB

ROOF

iNSULATION

CANT STRIP

FIELD
SUPPLIED
RIGID
INSULATION

ROOF

NOTES:
1. The YCZ036F models extend out past this end of the
curb ONLY.

SUPPLY
AIR
DUCT

MOUNTING
CURB

RETURN AiR
DUCT

2. TheYCZ050F, YCZ060F models extend past both the
end and the side of the curb as illustrated.

Page 3

DiMENSiONAL

CORNER

WEIGHT

(LBS)

MODEL
YCZO36F

WEIGHT

(LBS)

161 106

104

157

528

137

196

626

YCZO50F 172
YCZO60F 195

Page 4

NET
UNIT

121
129

132

199

DATA

656

29-3!16

18-9!16

11-1!16

85-1!8

33-3/8

21-1!16

15-1!16 4-15!1_

6-9!16

11-1!8

18-1!2 25-1!2 17-1!2
24

26-1!2

22-3/4

25-1/2

9-1!8 21-15!16

8-3/4

3-1/2

8-5/16

DiMENSiONAL

YCZ036,050,060F

152

CONTROL
ACCESS

DATA

OUTLINE

= FRONT

MM
/40

BOX
PANE

FlU
(FIE[D

NSTA

I ED)

7COMBUST
B/OWR

I ON
ACC[

GAS
ACCESS
_CONDENS
&

FOR
OAS

[1"}

DIA.

15 MM [1/2]
CONNECTION

RIGHT

SIDE
SIDE

Y952

CLEARANCE TO
COMBUSTIBLE MATERIAL

* 6.0"

BOTTOM

30.0"

BACK

0.0"
1.0"

24.0"

LEFT SIDE

6.0"

42.0"

RIGHT SIDE

6.0"

18" WITH FRESH AIR ACCESSORY
30" WITH ECONOMIZER

FRONT SIDE

12.0"

TOP

36.0"

FRONT

NPT

RECOMMENDED
SERVICE
CLEARANCE
BACK

K.O

066

LEFT

R
GUARD

MODEL

YCZ036F-M

29-3/16

27-1/2

YCZ050F-H
YCZ060F-M

65-1!8

33-3!8

27-15!16

Page 5

CONVERTING

HORIZONTAL

TO DOWNFLOW

NOTE
SUPPLY

OPENING

1. REMOVE SCREW
NEAREST
TO THE
OPENINGAND
PULLTHE PANEL FIRMLY
TOWARD THE OUTSIDE OF THE UNIT TO
DISENGAGE THE BACK ATTACHMENT.
RETURN

HEATER

EXCHANGER
TUBES

OPENING

2. REMOVE
RIGHT HAND SCREW AND
MOVE PANEL TO THE RIGHT OR REMOVE BOTH SCREWS.

SHEET
METAL
SCREWS

HORIZONTAL
RETURN
AIR COVER

HORIZONTAL
SUPPLY
AIR COVER

REQUIRED CLEARANCE
FOR UNIT INSTALLATION
AND ROOF PENETRATION
HOLE SiZE REQUIRED

SERVICE
CLEARANCE
LINES

SIDE RAIL

WOOD NAILER _

SERVICE CLEARANCE

& PENETRATION

DIMENSIONS

MODEL NO.

YCZ036F

30"

"12"

30"

44"

25"

YCZ050F
YCZ060F

42"

30"

"12"

36"

50"

25"

* 18" WITH FRESH AIR ACCESSORY
* 30" WITH ECONOMIZER

Page 6

LOCATIONS
HORIZONTAL

AND RECOMMENDATIONS

AIRFLOW APPLiCATiON

3. See the unit's nameplate for the absolute minimum clearance
between the unit and any combustible surface(s).

1. These units are design certified for outdoor installations. These
units may be installed directly on wood flooring or on Class A,
Class B, or Class C roof covering material. The discharge air
from the condenser fans must be unrestricted for a minimum of
3 feet above the unit.
NOTE:

IMPORTANT:
1. Remove the Flue and Air Inlet Hood with gasket from the return
air section of the unit.
The screws that attach the flue and air inlet hood will be installed
in their proper location at the factory. Therefore, they must be
removed and then used to attach the flue and the air inlet hood.

The unit is shipped for horizontal installation.

The Air Inlet Hood in the combustion blower access panel must
have adequate clearance around the air opening into the
combustion area. See Outline Drawing, Figure 3.

Examine all flue product-carrying areas of the furnace, its vent
system, and the main burner for safe operation. A periodic
inspection of the furnace should be made by a qualified service
agency at the start of each heating season.

NOTE:
Outdoor air or other requirements during heating
operation that result m supply air temperatures below 80
degrees F or return air temperatures below 50 degrees F may
cause flue gas condensate to form and is to be avoided.

Replacement parts tistfor this Gas/ElectricAir Conditioner, may be
obtained by contacting your local manufacturer representative.
NOTE: If any internal accessories are to be added to the unit,
install them at the shop if at all practical.
2. Location of the unit must allow service clearance around it.
Clearance of the unit must be given careful consideration. See
Figures 2, 3, and 4.

DOWNFLOW

APPLICATION

-= CURB MOUNTING

1. The
Roof
Mounting
Curb,
(field
assembled
BAYCURBO30,O38,033,034A),
or a field fabricated curb must
be in place before the unit is hoisted to the roof top.
2,

IMPORTANT:
Air outlet duct must have 1" clearance
combustible material downstream from the unit.

Remove the packaging material from the components and
secure the Flue and Air Inlet Hood with the gasket to the unit with
sheet metal screws as illustrated in Figure 5. See "Firing Rate
Selection" section for additional information.

3. Check the handling facilities to ensure the safety of personnel
and the unit(s).

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. In
addition, be sure to provide sufficient height above the roof
to prevent water from entering the unit.
NOTE: This unit was shipped for horizontal installation. Convert to downflow per instructions:

4 CAUTION MUST BE TAKEN AT ALL TIMES TO AVOID
PERSONAL INJURIES AND/OR DAMAGE TO EQUIPMENT

Remove covers from the downflow supply and return air openings and place them over the horizontal supply return air
openings (painted side out) and secure with sheet metal screws.
See Figure 6.

5. The unit must be mounted level for proper drainage of water
through the holes in the base pan.
6. The unit must not be exposed to direct roof water runoff.
3,

7. 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.
8. Holes through exterior walls must be sealed in accordance with
local codes.

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. See Figures 1, 7, 8, 9, 10, and 11.

4. Be sure the hole in the structure for the ducts is large enough to
accommodate the fabricated ducts and the insulation surrounding them. See Figure 4.

9. All fabricated outdoor ducts should be as short as possible.
Note: If any internal accessories are to be added to the unit,
install them at the shop if at all practical.

CLEARANCES
1. The recommended clearances for single-unit installations are
illustrated in Figure 4. These minimum requirements are not
only an important consideration when determining unit placement, but they are also essential to ensure adequate serviceability, maximum capacity, and peak operating efficiency.
2. 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.

These units are design certified for outdoor installation. These
units may be installed directly on wood flooring or on Class A,
Class B, or Class C roof covering material. The discharge air
from the condenser fans must be unrestricted for a minimum of
3 feet above the unit.
The air inlet hood in the combustion blower access panel must
have adequate clearance around air openings into the combustion area. See Outline Drawing, Figure 3.
continued on next page

Page 7

LOCATIONS

AND RECOMMENDATIONS

continued from page 7

Examine all flue product-carrying areas of the furnace, its vent
system, and the main burner for safe operation. A periodic
inspection of the furnace should be made at the start of each
heating season.
Replacement parts list for this Gas/Electric Air Conditioner may
be obtained by contacting your local manufacturer representative.

15. Access and service clearances for the unit must be given careful
consideration when locating the duct entrance openings. Figure 4 provides unit dimensions.
16. All fabricated outdoor ducts should be as short as possible.

CLEARANCES
1,

The recommended clearances for single-unit installations are
illustrated in Figure 4. These minimum requirements are not
only an important consideration when determining unit placement, but they are also essential to ensure adequate serviceability, maximum capacity, and peak operating efficiency.

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 sales engineer.

6. Location d the unit must allow for service clearance around it.
Clearance of the unit must be given careful consideration. See
Figure 4.
7. IMPORTANT:
The air outlet duct must have one (1) inch
clearance to combustible material downstream from the
unit.
8. 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
makeup air or a ventilation feature is to be used,
9. Check the handling facilities to ensure the safety of personnel
and the unit(s).
10. Caution must
injuries and/or

be taken at all times to avoid
damage to the equipment.

IMPORTANT:
1. Remove the Flue and Air Inlet Hood with the gasket from the
return air section of the unit.
The screws that attach the flue and air inlet hood will be installed
in their proper location at the factory. Therefore, they must be
removed and then used to attach the flue and air inlet hood.

personal

11. The unit must be mounted level for proper drainage of water
through the holes in the base pan.

2. Remove the packaging material from the components and
secure the Flue and Air Inlet Hood with the gasket to the unit with
sheet metal screws as illustrated in Figure 16 on page 14.

12. The unit must not be exposed to direct roof water runoff.
NOTE:
Outdoor air or other requirements during heating
operation that result in supply air temperatures below 80
degrees F or return air temperatures below 50 degrees F may
cause flue gas condensate to form and is to be avoided.

13. 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.
14. Roof flashing must be installed to seal the roof curb cavity and
must conform to local building codes.

INSTALLATION
UNIT SUPPORT
If the unit is to be roof mounted, check the appropriate building
codes for weight distribution requirements. Refer to the applicable
roof curb mounting instruction.
Check the unit's nameplate for
supply voltage required. Determine if adequate electrical power is
available. The furnace may be installed on Class A, B, or C roofing
material.

PLACING AND RIGGING
1. Before preparing the unit for lifting, check the outline drawing for
center of gravity for lifting safety. Because d placement of
internal components, the unit's weight may be unevenly distributed. Approximate unit weights are given in Figure 2, page 3.
NOTE. Accessory BA YLIFTOO2AA, a kit of four (4) lifting lugs, is ]
required for rigging the unit for hoisting. See Figure 7, insert B.

LOCATION AND CLEARANCES
2,

Insert the four lifting lugs in the openings provided in the drip lip
on the perimeter of the unit. See Figure 7, insert B. Atap or jerk
to the lug will overcome the interference that arises due to the
nipple on the lug.

Before hoisting the unit, be sure that the proper method of
rigging is used, with straps or 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.

Installation d the unit should conform to local building codes or, in
the absence of local codes, to the National Fuel Gas Code,
ANSlZ223.1, Latest Revision, and the National Electrical Code.
Canadian installations must conform to CSA and local codes.
Select a location that will permit adequate combustion and ventilation air in accordance with Section 5.3, Air For Combustion and
Ventilation, of the National Fuel Gas Code, ANSlZ223.1, Latest
Revision, or applicable provisions of the local building code.
Page 8

iNSTALLATiON
IMPORTANT: 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 a
clJvus, 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.
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.
IMPORTANT:
ing the unit.

"Spreader

Bars" must be used when hoist-

5 IMPORTANT:
The unit must be lowered into position. The
P.V.C. rubber tape on the curb flange permits the unit to be
repositJoned if required without destroying the P.V.C. rubber seals affixed to the mounting curb.

PLACING THE UNiT ON A MOUNTING CURB
1. The unit is designed with a perimeter drip lip that is lower that
the unit base bar, see Figure 7, inset A.
2.

Position the unit drip lip down over and in contact with the
outside corner of the curb, as illustrated in Figure 8, insert A.
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.

3. Take the two (2) hold-down brackets shipped with the curb and
secure the unit to the curb with hold-down brackets as illustrated
in Figure 8, insert A.

OUTDOOR
COIL
END OF UNIT

BASE OF UNIT
REST ON TOP OF
CURB
RAILS

iIBn

DRIP_

BA_L_OO,

DIMPLE

LIFTING LUGS

DRIP LIP ON
PERIMETER
OF UNIT

CURB

CORNER

J
NOTE:
THE INNER PERIMETER
OF THE DRIP LIP ON ALL UNITS
SHOULD
BE FLUSH WITH THE OUTER
PERIMETER
OF THE
CURB ON THE TWO SIDES SHOWN HERE SEE FIGURE 2 FOR
THE LOCATION OF THE UNIT OVERHANG
ON THE YCZO36-O60F
MODELS

®
EXISTING
SHEET METAL
I

SCREW

HOLD-DOWN
BRACKET
WITH
CURB

FLANGE OF
CURB

Page 9

INSTALLATION
ROOFTOP -- UNITS

4. Place the unit on the frame or roof curb. Refer to Figures 9 or
10.

For roof top applications using a field fabricated frame and ducts,
use the following procedure:
1. The frame must be located and secured by bolting or welding to
the roof. Flashing is required.
2. The hole in the roof must be prepared in advance of installing
the unit.

5. Secure the unit to the frame or roof curb.
6. 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.
7. Complete the installation according to the instructions
following sections of this manual.

3. Secure the ducts to the roof.

TYPICAL

ROOFTOP

APPLICATION

WITH FRAME

(YCZO36,050,O60F)

-,
,

TYPICAL

ROOFTOP

APPLICATION

(YCZ036,060F

WITH FRAME

MODELS)

ROOF

DUCT

ROOF

Page 10

SUPPLY

FLASHING

IRON
FRAME

AIR

FLASHING

INLET

HOOD

in the

INSTALLATION
GROUND LEVEL -= HORIZONTAL

UNITS

2. Attach the supply and return air ducts to the unit•

For ground level installations, the unit should be positioned on a pad
the size of the unit or larger• The unit must be level on the pad. The
pad must not come in contact with the structure (See Figure 11 .) Be
sure the outdoor portion of the supply and return air ducts are as
short as possible•

3. Insulate any ductwork outside of the structure with at least 2
inches of insulation and weatherproof• There must be a weatherproof seal where the duct enters the structure•
4. Complete the installation according to the instructions
following sections of this manual•

Proceed with the installation as follows:

in the

1. Place the unit on the pad and the five (5) rubber isolators
provided•

TYPICAL

GROUND

LEVEL APPLICATION

(YCZ036,050,060F

MODELS)

OUTDOOR
DISCHARGE

RETURN

AIR

SUPPLY
DUCT

DUCT
SIDING

/_"_1_
OUTDOOR
INTAKE

AIR

HOOD

SUPPORTPAD
FOUNDATION
EXTERIOR
WALL

i- :'.

INSULATE
WEATHERPROOF
OR RAIN SHIELD

FLEXIBLE
DUCT
CONNECTORS

CONDENSATE
A 3/4-inch female NPT condensate drain connection is provided on
the evaporator access panel end of the unit. See Figure 4. 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 12.

ISOLATORS
(1 PER CORNER
AND 1 UNDER
UNIT CONTROL
BOX)

DRAIN PiPiNG
(_

TYPICAL

CONDENSATE

DRAIN PiPiNG

3/4" PVC OR COPPER

NOTE:
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 not be connected to closed drain system•

Page 11

DUCTWORK
ATTACHING

DOWNFLOW

DUCTWORKTO

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

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.

Follow these guidelines for ductwork construction:
Connections to the unit should be made with three-inch
connectors to minimize noise and vibration transmission.

canvas

Elbows with turning vanes or splitters are recommended
mize air noise and resistance.

to mini-

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 must be indoors and made out of
heavy canvas.

NOTE: Do not draw the canvas taut between the solid ducts, i
The first elbow in the ductwork leaving the unit should be no closer
than two feet from the unit, to minimize noise and resistance.
AIR PROOF
THIS SEAM

BASE
WEATHERPROOF

FIELBDUCT.ql
\
JJ

UNIT
FLANGE

'UNIT DUCT
FLANGE

_I_

THIS SEAM
FIELD DUCT

AIR PROOF

UN,TBASE

UNIT EXTERIOR

" FIELD DUCT

UNIT DUCT FLANGE
WEATHERPROOF
THIS SEAM

AIR PROOF
_

FIELD

THIS SEAM

FIELDDucT
JL

DUCT

_TBASE
a

UNIT DUCT FLANGE

UNIT BASE
UNIT EXTERIOR
/
UNIT
FLANGE
WITH BUTYL
SILICONE

NOT RECOMMENDED

FIELD

UNIT DUCT
FLANGE

SEAM
OR

]I
_

WEATHERPROOF
THIS SEAM
FIELD DUCT

DUCT

HORIZONTAL
DOWNFLOW
The following

warning

complies

with State of California

kWARNING:

law, Proposition

This product

65.

contains

fiberglass wool insulation! Fiberglass dust and ceramic
fibers are believed by the State of California to cause
cancer through inhalation. Glasswool fibers may also
cause respiratory, skin, or eye irritation.
PRECAUTIONARY

MEASURES

• Wash clothes separately from other clothing: rinse
washer thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.
FIRST AID MEASURES

• Avoid breathing fiberglass dust.
•

Eye Contact

Flush eyes with water to remove dust.
If symptoms persist, seek medical
attention.

Skin Contact

Wash affected areas gently with soap
and warm water after handling.

Use a NIOSH approved dust/mist respirator.

• Avoid contact with the skin or eyes. Wear longsleeved, loose-fitting clothing, gloves, and eye
protection.
Page 12

GAS PiPiNG iNSTALLATiON
IMPORTANT:
Before making the gas pipe connection give
serious consideration to providing the required clearance nec=
essary
to remove
the access
panels
on the unit
(e.g., economizer and filter access panels).
1
NOTE: 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 5.0" W.
C. (inches Water Column) for natural gas and 11' W.C. for propane.
PIPE DELIVERY

SCHEDULE

(NATURAL

NOTE:
Theonly.
following procedure
Natural Gas
1.Obtain from the gas company
gravity of the gas delivered.

GAS

NOTE: If this is an propane appfication,
suppfler for pipe sizes and defiveries.
GAS PRESSURE

SET-UP

i
consult your propane |

PRECAUTIONS

WARNING:

NEVER
USE
ANOPEN
FLAME

TO TEST FOR GAS LEAKS: AN EXPLOSION
OCCUR, CAUSING INJURY OR DEATH.

COULD

IMPORTANT: The furnace and its individual shut-off valve
must be disconnected
from the gas supply piping system
during any pressure testing of that system at test pressures
exceeding 1/2 psig (3.48 kPa).

ONLY)

and tables below apply to

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).

the heating value and specific

GAS SUPPLY LINE PRESSURE

(ALL FUELS)

Before connecting the unit to the gas supply line, be sure to
determine the gas pressure in the line.

2.Determine the exact length of pipe needed.
3.Read the BTUH input nameplate on the furnace.
4.Use the multiplier opposite the specific gravity of the gas given in
Table 1 below and insert in the following formula:

TABLE

1
SPECIFIC
GRAVITY
.50
.55
.60
.65

MULTIPIERS TO BE USED
WHEN THE SPECIFIC
GRAVITY OF THE GAS IS
OTHER THAN 0.60

CFH =

MULTIPIER
1.10
1.04
1.00
.962

NOTE: Maximum pressure to the gas valve for natural gas
is 13.8" W.C. Minimum pressure is 5.0" W.C. Maximum
pressure to the gas valve for propane is 13.8"W.C. Minimum
pressure to the gas valve is 11.0" W.C.
If the supply line pressure is below the minimum supply pressure
indicated on the unit nameplate, contact the gas supply company.

Furnace Input in BTUH
Gas Heat Content in BTU/Cu. Ft. X Multiplier

Follow these steps to complete the installation of the unit gas piping.
See Figure 14.

This will give the factor for columns 2 through 6 in Table 2.
5.Using Table 2, select the pipe length nearest to yours.
&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

If the gas supply pressure is excessive (above 13.8 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 maximum pressure of 13.8" W.C. to
the gas valve for natural gas with a minimum supply pressure of 5.0"
W.C. Maximum supply pressure of 13.8" W.C. to the gas valve for
propane with a minimum pressure of 11.0" W.C.

1. Install a tapped, Style A (1/8-inch NPT tap) shut-offgas cock at
the end of the gas supply line near the unit. Be sure the tapped
gas cock is downstream of the pressure regulator, if used.

DEALER INSTALLED

NATURAL GAS ONLY

ACCESS

TABLE OF CUBIC FEET PER HOUR OF GAS
FOR VARIOUS PIPE SIZES AND LENGTHS

FOR TEST

GAUGE CONNECTION
FROM

PIPE
SIZE
(inch)

1/2

132

3/4

278

190

152

130

115

105

520

350

285

245

215

195

180

1-1/4

1050

730

590

520

440

400

370

Ir-6"--

LENGTH OF PIPE (feet)

IS BASED

QN PRESSURE

DROP OF 0.3 INCH W.C. AND 0.6 SP.GR.

TO MAIN
CONTROL
VALVE

GAIS S'-_PPLY
F'ELD SUPFLIE'_D D_

THIS TABLE

GROUND UNION

1!8" N.P.T.PLUGGED

LEG _

UN,T_

GAS VALVE, MUST BE
INSTALLED BY DEALER
OUTSIDE UNIT.

GAS

Page 13

GAS PiPiNG iNSTALLATiON
3

1®

FLUE AND HOOD ILLUSTRATION

the unit and should meet the specifications of all applicable
i national
NOTE: The
gas cock must be installed outside of |
and shut-off
local codes.

i.i

CLgT

(/ A.%KE

J [LE

2.Install a ground union joint downstream of the shut-off cock.
This joint must also be installed outside of the unit,
3.Install a drip leg at least six (6) inches in depth next to the
union as shown in Figure 14. This drip leg is required to
collect any sediment that may be deposited in the line,
4.Before connecting the piping circuit to the unit, bleed the air
from the supply line. 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.

TOP

ACC

-..

P_,NE

5.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.
I N

6.After installation of the gas pipe in the unit, the pipe chase
opening should be closed with the fitter/barrier plug provided.
MANIFOLD

H(}O}

--,
\

PRESSURE

Check the manifold pressure at the unit gas valve. Do not
exceed the recommended pressure shown on the unit nameplate.

BURNER & VALVE ILLUSTRATION
}ET
SET

PRESSURE
SCREW:

51/32"

POST .....
HEX

j
HEAD

OUT T PRISSURE POS1
S_F SCI:/IW: 3/32"
HrX HrAD

/
N

REGOLATORCOVER
P/
\

15t

STAG"

\\
\\

REGULATOR

.......

MANUAl

"oN/o_"

TOP ViEW

SWITCH

VIEW

BETAIL::A::

I_BI_

_TE
CONNECTOR

N_LOCK

WHITE RODGERS 36G
GAS

VALVE

WITH

MANUAL "ON/OFF"
SWITCH
BRASS

SWITCH

/
SPRING

DETAIL_
:At
WHITE RODGERS 36E
GAS VALVE
WITH
MANUAL
"ON/OFF"
SWITCH

Page 14

COVER

}LC

]

GAS

PiPiNG

INSTALLATION

INPUT CHECK AND ADJUSTMENT

TABLE

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 3 with the
time clocked.
4. Read the "Flow" column opposite
clocked.

the number of seconds

5. Use the following factors if necessary.
For 1 Cu. Ft. Dial Gas Flow CFH =
Chart Flow Reading / 2
For 1/2 Cu Ft. Dial Gas Ftow CFH =
Chart Flow Reading / 4
For 5 Cu. Ft. Dial Gas Flow CFH =
10X Chart Flow Reading / 4
6. Multiply the final figure by the heating value of the gas obtained
from the utility company and compare to the nameplate rating.
This must not exceed the nameplate rating.
7. Changes can be made by adjusting the manifold pressure.

Sec.
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

GAS FLOW IN CUBIC FEET PER HOUR
2 CUBIC FOOT DIAL
Flow
Sec.
Flow
Sec.
Flow
Sec.
900
29
248
50
144
82
800
30
240
51
141
84
720
31
232
52
138
86
655
32
225
53
136
88
600
33
218
54
133
90
555
34
212
55
131
92
514
35
206
56
129
94
480
36
200
57
126
96
450
37
195
58
124
98
424
38
189
59
122
100
400
39
185
60
120
104
379
40
180
62
116
108
360
41
176
64
112
112
343
42
172
66
109
116
327
43
167
68
106
120
313
44
164
70
103
124
300
45
160
72
100
128
288
46
157
74
97
132
277
47
153
76
95
136
267
48
150
78
92
140
257
49
147
80
90
144

Flow
88
86
84
82
80
78
76
75
73
72
69
67
64
62
60
58
56
54
53
51
50

a. Attach a manifold pressure gauge.
b. Remove the slot screw on top of the gas valve for 1st stage
manifold pressure adjustment. Remove slot screw on outlet
side for 2nd stage adjustment (See Figure 17).

IMPUT ADJUSTMENT

c. Turn the adjustment nut in to increase the gas flow rate, and
out to decrease the gas flow rate using a 3/32" hex wrench.

HIGH ALTITUDE

INSTALLATION
ADJUSTMENT

Unit nameplate ratings are based on equipment operation from sea
level to 2000 feet elevation above sea level. If the unit installation
is from 2000 - 4500 feet elevation, it wilt be necessary to change
the burner orifices to the noted sizes, (ref. National Fuel Gas Code,
sec 8.1.2, Appendix F, Table F4).
GAS

MAN. PRESS

ORIFICE SIZE

TYPE

( in. W.C. )

0 =2000 ft

2000 = 4G00 ft

NATURAL

3.3

PROPANE

10.0

42*

FACTORY SHIPPED

LGAS

VALVE ON/OFF
TOGGLE SWITCH

2rid Stage (Hi)
Manifold

°@0

Pressure

wh,,:::ogo

Adjustment

1st Stage (Lo)
Manifold
Pressure

Adjustment

Page 15

FILTER

INSTALLATION
TABLE

AIR FILTERS
Filters are to be used with the YCZ036,050,060F heating/cooling
units. The basic unit does not have filters in it. However, a filter
frame accessory is offered that wilt allow filters to be installed within
the unit.
Otherwise a filter rack must be installed by the installer in the duct
work,
Affix the filter label supplied with the unit adjacent to the filter area.

ELECTRICAL
ELECTRICAL

CONNECTIONS

Electrical wiring and grounding must be installed in accordance with
local codes or, in the absence of local codes, with the National
Electrical Code ANSI/NFPA 70, Latest Revision.
ELECTRICAL

POWER

It is important that proper electrical power be available for the unit.
Voltage variation should remain within the limits stamped on the unit
nameplate,
DISCONNECT

SWITCH

Provide an approved weatherproof disconnect either on the side of
the unit or within close proximity and within sight of the unit.
OVER

CURRENT

PROTECTION

The branch circuit feeding the unit must be protected as shown on
the unit rating plate.
POWER

WIRING

The power supply lines must be run in weathertight conduit to the
disconnect and into the bottom of the unit control box. Provide strain
relief for all conduit with suitable connectors.
Provide flexible conduit supports whenever vibration transmission
may cause a noise problem within the building structure.
Be sure all connections

are made tight. See Figure 18.

NOTES: For branch circuit wiring (mare power supply to unit
disconnect), wire size forthe length of run should be determined
using the circuit ampacity found on the unit nameplate and the
N.E.C.
For more than 3 conductors in a raceway or cable, see the
N.E.C. for derating the ampacity of each conductor.
GROUNDING: THE UNITMUST BE ELECTRICALLYGROUNDED
IN ACCORDANCE WITH LOCAL CODES OR THE NATIONAL
ELECTRIC CODE.

Page 16

NOMINAL

FILTER*

FILTER

CFM

Sq.Ft.- SIZE

RESISTANCE

YCZ036F

1200

0.05

YCZ050F

1600

5.33

0.05

YCZ060F

2000

6.67

0.05

UNIT

*Filters must be installed in the return air system. The above square
footages are based on 300 F.PM. face velocity. If permanent filters are
used, size per mfg. recommendation
with clear resistance of 0.05" WC.

WIRING
NOTE: Unit must be grounded for ignitor to operate properly. Gas pipe to unit is not an adequate ground. Ground
the unit internally as provided.
See wiring diagram for
location.

CONTROL WIRING (CLASS II)
Low voltage control wiring should not be run in conduit with power
wiring unless Class 1 wire of proper voltage rating is used. Route
the thermostat cable or equivalent single leads of No. 18 AWG
colored wire from the thermostat subbase terminals through the
rubber gromment on the unit. See Figures 3 and 4 for the control
entry location.
Make connections as shown on the unit wiring
diagram and in Figure 18.
Do not short thermostat
transformer.

wires since this wilt damage the control

Recommended wire sizes and lengths for installing the unit thermostat are provided in Table 5. The total resistance of these low voltage
wires must not exceed one (1) ohm. Any resistance in excess of 1
ohm may cause the control to malfunction because of the excessive
voltage drop.

TABLE

THERMOSTAT

WIRE SIZE AND MAXIMUM LENGTH

WIRE SIZE
18
16
14

MAXIMUM LENTGH (Ft)
75
125
200

THERMOSTAT

HEAT ANTICIPATOR

The thermostat heat anticipators should be set to .4 amps on single
or two stage thermostats.
IMPORTANT:
Upon completion of wiring check all electrical
connections, including factory wiring within the unit, make
sure all connections are tight. Replace and secure all electrical box
covers and access doors before leaving the unit or turning on the
power to the unit.

ELECTRICAL
After all electrical wiring is complete, set the thermostat
system
switch in the OFF position so that the compressor will not run
and then apply power by closing the system main disconnect switch.
This wilt activate the compressor sump heat. Do not change the

WIRING
Thermostat System Switch until power has been applied
long
enough to evaporate any liquid R-22 in the compressor.
It is
recommended that the sump heater be energized for eight (8) hours
prior to starting.

YCZ-F FIELD WIRING DIAGRAM
PACKAGED

UNIT

GAS-ELECTRIC

CONTROL

IITHERMOSTAT

BOX

CONNECT

IONSI

1
I COMMON

.......

47A(BK)

FAN

/F]_......

44A(YL)

COMPRESSOR

FIRST

41A[BR)

HEAT F_RST

STAGE

41C(BR)

W2 I HEAT SECOND STAGE

'_
Z_

_-----55A(RD)

UNIT

GROUND_
WIRE

36(BL )

i____
Q

UNIT

LOW VOLTAGE
"_
45A(YL)
AREA

STAGE

I 24V

Y2 .. COMPRESSOR SECOND STAGE

-yPI
ROWER

)TYPICAL
2 STAGE
HEAT THERMOSTAT

L_,
3 PH
POWER
UNIT
NOTE

ECONOMIZER
CONNECT
I

ACCESSORY
IONS

ECONOMIZER

FACTORY

PROVIDED

F_ELD
INSTALLED
WIRES

_2!222222!2_

I
II

I I1
LI

I
I

36E_(BLI___

56B(BL) e

I
I-------i
_
f_ ,
L--.--I--44--ELYL)--_TC

I ........

44AIYL) YI

,TA,°K,

tF"

E (OR)

111

2:::::

ON,;LOW
III

TYPICAL
THERMOSTAT

-,,c,oR,
w2

2-STAGE

NOTES:
I.

FUSED
DISCONNECT
OF EQUIPMENT
MUST

BE SURE
POWER
SUPPLY
HEATER
NAMEPLATE.

LOW

VOLTAGE

SEE

UNIT

THE

THERMOSTAT

A 'G'
SIGNAL
HEATING
MODE
6.

WIRING

DIAGRAM

SIZE,
POWER
COMPLY
WITH
AGREES
TO BE
FOR

ON THE

WIRING
CODES.
WITH

AND

EQUIPMENT

AWG MINIMUM

ELECTRICAL
GAS/ELECTRIC

UNiT

JUMPER Wt
10 MINUTES

INTER-COMPONENT

AND

WIRING

24V.
LINE

V. }

FACTORY
WIRING

24V.
LINE

V, _

F_ELD
WIRING

CONDUCTOR,

CONNECTION

IN THE COOLING
MODE ONLY.
THE FAN WILL
BE ENERGIZED

FOR SINGLE
STAGE THERMOSTATS
SECOND
STAGE
HEAT WILL
BEGIN
STAGE.

GROUNDING

DETAILS.

MUST

PROVIDE

DURING
BY THE

THE
SYSTEM,

AND W2
AFTER

TOGETHER.
FIRST

WIRE COLOR
ABBR COLOR

DESIGNATION
ABBR
COLOR

BLACK

BLUE

PURPLE
RED

BROWN

WHITE

GREEN

YELLOW

ORANGEi

Page 17

START - UP
PRE-START QUICK CHECKLIST
Is the unit properly located and level with the proper clearance?
See Figure 4.
Is the duct work correctly sized, run, taped, insulated, and
weatherproofed with proper unit arrangement?
See Ductwork
Installation section.

NOTE: Do not use the pressures from the unff's SERVICE FACTS
to determine the unit refrigerant charge. The correct charge is
shown on the unit nameplate. To charge the system accurately,
weigh in the charge according to the unit nameplate.

VOLTAGE
With the compressor operating, check the line voltage at the unit.
The voltage should be within the range shown on the unit nameplate. If tow voltage is encountered, check the size and length of the
supply line from the main disconnect to the unit. The line may be
undersized for the length of the run.

•

Is the gas piping correctly sized, run, trapped, and purged d air?
See Gas Piping section.

•

Is the condensate line properly sized, run, trapped, and pitched?

•

Isthe fitterofthe correct size and number? Is it clean and in place?

•

Is the wiring properly sized and run according to the unit wiring
diagram?

Place the system selector in the OFF position or reset thermostat at
a setting above room temperature.

•

Are all the wiring connections,

•

Has the unit been properly grounded and fused with the recommended fuse size? See Wiring Data.

Do not de-energize the main power disconnect except when unit is
to be serviced. Power is required to keep the heat pump compressor warm and boil off refrigerant in the compressor.

•

Is the thermostat level, correctly wired, welt located, and set for
the proper heat anticipation?

including those in the unit, tight?

•

Have the air conditioning systems been checked at the service
ports for charge and leak tested if necessary?

•

Does the condenser fan and indoor blower turn free without
rubbing, and are they tight on the shafts?

•

Has the indoor blower speed been determined and the proper
speed been set? See the Unit Wiring Diagram.

•

Has all work been done in accordance with applicable local and
national codes?

•

Are all covers and access panels in place to prevent air loss and
safety hazards?

COOLING SHUT DOWN

HEATING CYCLE
NOTE: See Sequence of Heating Operation.
These units are equipped with a solid-state ignition control that
lights the burners each time the thermostat calls for heat. The
burners are extinguished during the OFF cycle.
The gas heating section of the unit can be started using the following
procedure:
1. Be sure the thermostat is at its lowest setting and the power to
the unit is off.
a. Turn the main shutoff valve on the gas supply line ON.
b. Turn or switch the manual valve on the combination
valve ON position.
2,

STARTING THE UNIT iN THE COOLING MODE

to the highest setting in the heating

As the thermostat calls for heat, the system cycles as follows:
a. The combustion

blower is energized.

b. The pressure switch is closed.
c. The gas valve opens and the ignitor lights the burner.
d. Cycle the thermostat on and off a few times to check out the
control system and burner operation characteristics.
4,

With the burners operating, check the manifold pressure with a
manometer. Do not exceed recommended pressures.

Adjust the unit to obtain an air temperature
specified on the unit nameplate.

NOTE: For manifold pressures and orifice sizes for gas with
other BTU ratings, contact the local gas utility.
Manifold
pressure should be 3.3 inches water column (+0.1). Input must
not exceed the value shown on the rating plate.

Set the heat anticipator of the thermostat to equal the amperage
draw of the gas valve, approximately 0.7.

PRESSURES

After the unit has operated in the cooling mode for a short period of
time, install pressure gauges on the gauge ports of the discharge
and suction line valves. Check the suction and discharge pressures
and compare them to the normal operating pressures provided in
the unit's SERWCE FACTS.

Page 18

b. Turn the thermostat
cycle.

for a

To start the unit in the cooling mode, set the thermostat system
switch to COOL and move the thermostat COOL indicator to a
setting below room temperature.
The condenser (outdoor) fan
motor compressor and evaporator (indoor) fan motor will operate
automatically.

OPERATING

access panel is in place.

a. Turn on the electrical power to the unit.

CAUTION: Before starting the system on the cooling cycle, turn the
thermostat switch to OFF and close the unit disconnect switch. This
procedure energizes the compressor crankcase heater, vaporizing
any liquid refrigerant in the crankcase. This is a precaution against
foaming at start-up which could damage the compressor bearings.
Allow the heater to operate a minimum of eight (8) hours.
NOTE:
See the section on "Sequence of Operation"
description of the cooling operating sequence.

Be sure the burner compartment

gas

rise with that

START - UP
8. Set the thermostat at the desired temperature setting and the
unit wilt function automatically.

STARTING THE UNIT IN THE GAS HEATING MODE

6. Cycle the thermostat OFF and ON a few times at a rate of not
more than once every thirty (30) seconds. Check both the
control operation and the burner operating conditions.

MANIFOLD PRESSURE
1. Check to make sure all grilles and registers are open and all unit
access doors are closed before start-up.
2. Purge the gas supply line of air by opening the union ahead of
the unit. When the odor of gas is detected, retighten the union
and wait five (5) minutes before proceeding.
3. Set the walt thermostat to its lowest position and place the fan
switch in the AUTO or ON position.
4. Open the main gas valve(s) and turn on the unit power supply.

Connect a manometer to the pressure tap at the outlet side of
the unit's gas valve. Read the manifold pressure with the main
burners firing.

If the manifold pressure reading does not match the value
indicated on the unit nameplate, the unit pressure regulator
must be adjusted as follows:
a. Remove the cover screw on the gas regulator located on the
front side of the unit's gas valve.
b. Turn the adjusting screw clockwise to increase manifold
pressure or counterclockwise to decrease manifold pressure.

5. Reset the heating temperature lever on the room thermostat at
the highest value above room temperature. The combustion
blower motor should energize. The main burners should light
within 20-25 seconds. Initial start may be delayed somewhat if
the unit has not been purged and air is trapped in the gas line.

3. Check the temperature rise during furnace operation to insure
that it falls within the range specified on the unit nameplate.

NOTE: Blue smoke produced by the heat exchanger during the
initial burner firing is caused by a thin film of off on the surface
of the heat exchanger. This off will burn off quickly.

4. If the temperature rise noted is outside of the specified limits,
adjust the indoor air flow to cause the temperature rise d the
heat exchanger to fall within the required range.

SEQUENCE

OF OPERATION

Operation of the unit heating or cooling cycles is controlled by the
setting of the system switch on the room thermostat. Once the
system switch is placed either in the "HEAT" or "COOL" position, unit
operation is automatic. Afan switch on the thermostat also provides
for it continuous operation of the evaporator fan when desired. The
fan switch "ON" position provides continuous operation while the
"AUTO" position provides operation during the heating or cooling
cycles.
HEATING CYCLE
Thermostat call for heat ( 2-stage thermostat)
Call for 1st stage only:
(R) and (W1) thermostat contacts close signaling the control module
(IGN) to run its self-check routine. After the control has verified that
the pressure switch (PS) contacts are open, the limit switch (TCO)
contacts are closed, and the flame rollout (FL) switch is closed, the
induced draft blower (CBM) will be energized on high speed for
approximately 15 seconds.
After the induced draft blower (CBM) has come up to speed, the
control will verify that the pressure switch (PS) contacts are closed
and switch the induced draft blower to low speed for an additional
5 seconds of prepurge. The gas valve (GV) is energized in the first
stage to permit gas flow and the spark ignitor (IP) is energized. The
flame detector (FD) confirms that ignition has been achieved within
the 7 second trial period.
As the flame detector confirms that ignition has been achieved the
delay to indoor fan on period begins timing and after approximately
45 seconds, the indoor blower motor (IDM) will be energized at low
speed and will continue to run during the heating cycle.

Call for 2nd stage after 1st stage:
(R) and (W2) thermostat contacts close signaling a call for second
stage heat. The induced draft motor (CBM) is energized on high
speed and the gas valve on second stage. After approximately 30
seconds the control energizes the indoor blower on high speed.
2rid stage satisfied, 1st stage still called:
(R) and (W2) opens, the induced draft blower is reduced to low
speed the gas valve is reduced to first stage. After aprox. 30
seconds the indoor blower motor is reduced to low speed.
1st stage satisfied:
(R) and (Wl) opens, the gas valve (GV) will close. The induced draft
blower (CBM) will be de-energized after approximately 5 seconds
postpurge. The indoor btower motor (IDM)witt continue to run for the
fan off period (field setectabte 60 or 90 seconds [by jumpers]), then
wilt be de-energized by the control module.
Thermostat satisfied:
(R) and (W1/W2) (jumpered) contacts open signaling the control
module to close the gas valve and de-energize the induced draft
blower after approximately 5 second postpurge. The I.D. blower
motor will continue to operate at the current speed for 60 or 90
seconds after the flames are extinguished.
SAFETY SEQUENCES
This product is equipped
abnormal conditions.

with safety devices to protect against

The temperature limit switch (TCO) is located in the gas compartment on the vestibule panel above the burner assembly. This
automatic reset device protects against excessive leaving air temperature. If this device opens, the gas valve is immediately closed
and will not permit operation until the limit switch closes.

Page 19

SEQUENCE

OF OPERATION

The rollout switch (FS) is located in the gas compartment near the
inlet of the burners. This is a single use device designed to protect
against any form of flame rollout. If this device is opened the gas
valve is immediately de-energized and the control (IGN)will lockout
the system. The roltout switch (FS) must be replaced before
operation is allowed to continue.
The pressure switch (PS) is located in the upper right side of the gas
compartment. This automatic device assures adequate combustion
air pressure. If pressure against the induced draft blower outlet
becomes excessive, the pressure switch will react and shut off the
gas valve, until acceptable combustion pressure is again available.
If the control (IGN) does not sense flame within the first trial for
ignition period. The gas valve wilt be de-energized. The control
(IGN) will initiate a 60 seconds interpurge. Following the interpurge,
on the second trial the gas valve wilt be energized on second stage
(high heat input). If the flame is sensed within 10 seconds after the
second try and only a call for first stage exists, the gas valve will be
reduced to first stage. If the second try is not successful. The control
wilt start other 60 second interpurge. After the interpurge, a third
attempt will be tried. The gas valve wilt be energized on second
stage (high heat input). Ifthe flame is sensed within 10 seconds after
the third try and only a call for first stage exists, the gas valve wilt be
reduced to first stage. If the third try is not successful. The control
will lock out.
If loss of flame occurs during a heating cycle, the control (IGN) wilt
close the gas valve. The control will than recycle the ignition
sequence, then if ignition is not achieved, it will shut off the gas valve
and lock out the system.
If control lock out occurs, the control (IGN) wilt retry a complete
ignition sequence in 1 hour.
The control (IGN) can be reset by removing power to the unit or by
turning the thermostat from "on" to "off" for approximately three
seconds, then back "on."
COOLING CYCLE
Thermostat call for cool ( 2-stage thermostat)
Call for 1st stage only:
With the room thermostat system switch in the "COOLING" position
and the fan switch in the "AUTO" position, the YI thermostat
contacts closes to the micro board, (the board will wait 3 seconds to
check ff the Y2 may also be calling) the micro will energize (CCI)
and the outdoor fan relay for towspeed and the G thermostat contact
to G-IGN and to G1 on the ICMC is energized. (The status light is
flashing and the Y1 light is on.)

Call for 2rid stage after 1st stage:
The Y2 thermostat contact closes to the control board. For 1 minute
both compressors are off, (all lights are flashing for 1 minute), than
the board will energize the (CC2) compressor contactor, and the
outdoor fan relay for high speed then the board (YCZ050 ON LY- will
energize the (CC1) and 1 second later the (CC2) compressor
contactors) and the indoor fan high to the Y on the ICMC board is
energized for indoor high speed fan operation. (The status light is
flashing and the Y1 and Y2 lights are on.)
2nd stage satisfied,

1st stage still called:(YCZ036,060F

The Y2 thermostat contact opens to the control board. For 1 minute
both compressors are off, (the status and Yf light are flashing for I
minute), than the board will energize (CC1)tow compressor contactor,
and the outdoor fan retay for low speed and indoor fan for low speed.
(The status light is flashing and the Y1 light is on.)
2rid stage satisfied,

1st stage still called:(

With the thermostat fan switch in the "ON" position, the G thermostat
contact is closed to G1 on the ICMC board and the indoor fan motor
(IDM) will continue to run on low speed regardless of compressor
and condenser fan operation.

YCZ050 ONLY)

The Y2 thermostat contact opens to the control board. The board
wilt de-energize (CC2) second compressor contactor, and energize
the outdoor fan relay for low speed and indoor fan for low speed.
(The status light is flashh_g and the Y1 light is on.)
ICM FAN MOTOR ADJUSTMENTS
If the airflow needs to be increased or decreased, see the Indoor
Blower Performance Table below. Information on changing the dip
switch settings for speed control of the blower motor is in this table.
Blower speed changes are made on the ICM Fan Control mounted
in the control box. The ICM Fan Control controls the variable speed
motor.
There is a bank of 8 dip switches, (See Figure below), located at the
lower right side of the board. The dip switches work in pairs to select
the cooling/heat airflow (CFM/TON), and Fan off-delay options.
INDOOR BLOWER TIMING
The ICM Fan Control controls the variable speed indoor blower. The
FAN-OFF period is set on the ICM Fan Control board by dip switches
#5 and #6.

CFMICM
FAN
SELECTION

CONTROL
DIP
21C800796P0
CNT03600

LIGHT/!

jjSWITCHES
012345678

CFM FAN
z

The energized compressor contactor (CCI) completes the circuit to
the compressor (CPR1), If the compressor safety controls are
closed, the compressor (CPR1) will operate with the outdoor fan
motor (ODM) on tow speed. The indoor fan motor (IDM) will operate
on tow speed. The thermostat will continue to cycle the compressor
and fans to maintain the desired temperature.

Y L0

o12345678

DIP SWITCHES (TYPICAL SETTINGS)

Page 20

ONLY)

IGN LED DIAGNOSTIC
FLASHING

SLOW

CONTINUOUS
CONTINUOUS

INDICATOR

NORMAL

CALL FOR HEAT
NORMAL

OFF

CHECK POWER / INTERNAL

2 FLASHES

SYSTEM LOCKOUT

3 FLASHES

PRESSURE

FAILURE

( NO FLAME )

SWITCH

PROBLEM

4 FLASHES

HIGH LIMIT (TCO) OPEN

5 FLASHES

FLAME SENSED WITH GAS VALVE OFF

6 FLASHES

FLAME ROLLOUT

7 FLASHES

SWITCH (FL) OPEN

W1 & W2 SWAPPED

CHECKOUT
(_

PROCEDURE

TROUBLESHOOTING

CHART

.................
u:7
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Liquid Pressure Too high

Liquid Pressure Too Low

Suction Pressure Too High

Suction Pressure Too Low
Liquid Refrigerant floodback
Liquid Refrig. floodback

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SS

SPS
SS

(TXV System)
P

(Cap. Tube System)

I. D. Coil Frosting
Compressor

Runs Inadequate or No Cooling

SPS

ELECTRICAL
Compressor

& O.D. fan Do Not Start

CompressorWill

Not Start But O.D. Fan Runs

O.D. Fan Won't Start
Compressor

Hums ButWill

Not Start

Compressor Cycles on IOL
I.D. BIowerWon't
P-PRIMARY

Start

CAUSES

S
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P
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p
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S-SECONDARY

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X66,€590

Page 21

MAINTENANCE
ROUTINE MAINTENANCE BY OWNER

•

You can do some of the periodic maintenance functions for your
YCZ-F unit yourself; this includes replacing the disposable or
cleaning the permanent air filters, cleaning the unit cabinet,
cleaning the condenser coil, and conducting
a general unit
inspection on a regular basis.

Visually inspect the unit to ensure that the airflow required for
combustion
and condenser coil is not obstructed from the
unit.

•

Inspect the control panel wiring to verify that all electrical
connections are tight and that the wire insulation is intact.

•

Check the operation of the gas ignition system as follows:
Turn off the gas supply with the unit operating to verify that the
gas valve closes and that a ignition cycle is initiated by the
unit.
Visually inspect the inside of the burners and the burner ports
for deposit buildup and corrosion. Wipe and brush the inside
of the burner and the burner ports and then clean with a dry
cloth. If the deposit buildup or corrosion is excessive, replace
the burners.

When the system is in constant
operation.
In new homes,
check the filters every week for the first four (4) weeks.
If you have disposable-type
filters, replace them with new filters
of the same type and size. Do not attempt to clean disposable
filters.
Permanent-type
filters can be cleaned by washing them with a
mild detergent and water. Make sure that the filters are thoroughly dry before reinstalling them in the unit (or duct system).

•

FLUE CLEANING
NOTE:
It may be necessary to replace permanent filters
annually if washing fails to clean the filter or if the filter shows
signs of deterioration.
Be sure to use the same type and size
as was originally installed.

Before each heating season, the flue should be inspected for
signs of flaking rust and soot deposits. Dirty flues should be
cleaned
by qualified
service
personnel
ONLY using the
following procedure:
1. Turn the room thermostat to the OFF position. Turn the main
power disconnect OFF. Turn the manual gas valve OFF.

CONDENSER COIL
Unfiltered air circulates through the unit's condenser coil and
can cause the coil's surface to become clogged with dust, dirt,
etc. To clean the coil, vertically (i.e., with the fins) stroke the coil
surface with a soft-bristled brush.

2. Remove the flue cap, the lower access panel, and the upper
access panel.

Be sure to keep all vegetation
area.

4. Remove all wires from the gas value while carefully
their location.

,&WARNING:

away from the condenser

coil

3. Remove the combustion blower assembly from the fluebox.
Remove the flue box and the flue restrictors.

5. Disconnect
TO PREVENT

AN EXPLOSION

OR POSSIBLE INJURY, DEATH AND EQUIPMENT DAMAGE,
DO NOT STORE COMBUSTIBLE
MATERIALS, GASOLINE

noting

the gas supply line from the valve.

6. Remove the manifold retaining screws and pull the burnermanifold assembly from the heat exchanger.
7. Remove the inlet turbulators
damage them.

being careful not to break or

8. Wipe the flue box and flue baffles clean with a clean, dry
cloth.
MAINTENANCE
PERFORMED
COOLING SEASON

BY SERVICEMAN--

9. CAUTION:
Never use combustible
any part of the furnace.

cleaning

To keep your unit operating safely and efficiently, the manufacturer recommends that a qualified serviceman check the entire
system at least once each year and any other time that you feel
one is needed. Your serviceman should examine these areas of
your DCX-F unit:

10. Replace

all gaskets with new ones.

11. Replace

all damaged

•

filters (for cleaning

•

motors and drive system components

13. Check all wires for correct installation
unit's electrical wiring diagram.

•

economizer

•

safety controls

•

electrical components and wiring (for possible
and connection tightness)

•

condensate

•

unit duct connections (to see that they are physically
and sealed to the unit casing)

or replacement)

gaskets

cleaning)
replacement

unit mounting

•

the unit (for obvious

support

(for structural

sound

integrity)

unit deterioration)

MAINTENANCE PERFORMED BY SERVICEMAN-HEATING SEASON
Completethe unitinspectionsand
serviceroutinesdescribed
below atthebeginningofeachheatingseason.

Page 22

with new ones.

15. Reinstall
stack.

by referring

to the

with a soap and water

the top and bottom access

panels

and the flue

16. Visually inspect the unit to ensure that the airflow opening for
combustion is not obstructed.

drain (for cleaning)

•

12. Reassemble the unit by reversing Steps 2 through 7 above.
Take care that all gaskets seat properly.

14. Leak test all gas line connections
solution or the equivalent.

(for possible replacement)

(for mechanical

or broken turbulators

fluids

17. Follow the start-up procedure
in service.

,&WARNING:

above to place the unit back

DO NOT OPERATE

THE

UNIT

WITHOUT THE EVAPORATOR
FAN ACCESS PANEL IN
PLACE.
REINSTALL
THE
ACCESS
PANEL
AFTER
PERFORMING ANY MAINTENANCE PROCEDURES ON THE
FAN. OPERATING
THE UNIT WITHOUT
THE ACCESS
PANEL PROPERLY INSTALLED MAY RESULT IN SEVERE
PERSONAL INJURY OR DEATH.

LIMITED WARRANTY
COMBINATION

GAS ELECTRIC

AIR CONDITIONER

YCZ, YCY AN D YCX
Models Less Than 20 Tons for Residential

Use*

(Parts Only)
This limited warranty is extended byAmerican Standard Inc., to the original purchaser and to any succeeding
)wner of the real property to which the Combination Gas Electric Air Conditioner is originally affixed, and
applies to products purchased and retained for use within the US.A. and Canada.
f any part of your Combination Gas Electric Air Conditioner fails because of a manufacturing defect within
_veyears from the date of the original purchase, Warrantor will fumish without charge the required
eplacement part. Any local transportation, related service labor, diagnosis calls, air filters, refrigerant and
elated items are not included.
n addition, if the sealed motor-compressor(s) fail(s) or the outdoor coiF should become defective, either or
_oth events occurring because of a manufacturing defect within the sixth through tenth year from the date of
_riginal purchase, Warrantor will fumish without charge the required replacement compressor and/or outdoor
:oil. Any local transportation, related service labor, diagnosis calls, refrigerant and related items are not
ncluded.
NOTE: If your Combination Gas Electric Air Conditioner is installed within one mile of salt water, including but
_ot limited to seacoasts and inland waterways, your outdoor coil warranty as stated above is limited to five
,ears from the date of original purchase.
n addition, ifthe steel heat exchanger fails because of a manufacturing defect within the sixth through
.wentieth year
•Tomthe date of original purchase, Warrantor will fumish without charge a replacement heat exchanger. Any
ocal transportation, related service labor and diagnosis calls are not included.
This limited warranty does not cover failure of your combination gas electric air conditioner if it is damaged
ivhile in your possession, damage caused by unreasonable use of the combination gas electric air
_onditioner and/or damage from failure to properly maintain the combination gas electric air conditioner as
_et forth in the Use and Care manual (see Proper Maintenance section).
This limited warranty applies to product installed on or after 10/1/2001 where product is manufactured after
1/1/2000. This limited warranty is not retroactive to any installations prior to 10/1/2001 or on product produced
_rior to 2000.
THE LIMITED WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER
NARRANTIES
AND LIABILITIES, WHETHER IN CONTRACT OR IN NEGLIGENCE,
EXPRESS
DR IMPLIED, IN LAW OR IN FACT, INCLUDING IMPLIED WARRANTIES
OF
VlERCHANTABILITY
AND FITNESS FOR PARTICULAR
USE, AND IN NO EVENT SHALL
NARRANTOR
BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES.
;ome states do not allow limitations on how long an implied limited warranty lasts or do not allow the
xclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not
apply to you. This limited warranty gives you specific legal rights, and you may also have other rights which
zary from state to state.
_arts will be provided by our factory organization through an authorized service organization in your area
isted in the yellow pages. If you wish further help or information concerning this limited warranty, contact:
_,merican Standard Inc.
Troup Highway
Tyler, TX 75711-9010
_,ttention: Manager, After Sales Support

GW-631-1802

This limited warranty is for residential usage of this equipment and not applicable when this equipment is
Bed for a commercial application. A commercial use is any application where the end purchaser uses the
_roduct for other than personal, family or household purposes.
Page 23

LiMiTED WARRANTY
COMBiNATiON

GAS ELECTRIC

AiR CONDiTiONER

YCZ, YCY, YCX, YCC, YCD, YCH, YCP, YHC and YSC
Models Less Than 20 Tons for Commercial Use*
(Parts Only)
his warranty is extended byAmerican Standard Inc., to the original purchaser and to any succeeding owner of
the real property to which the Combination Gas Electric Air Conditioner is originally affixed, and applies to
products purchased and retained for use within the USA. and Canada. There is no warranty against
corrosion, erosion or deterioration.
If any part of your Combination Gas Electric Air Conditioner fails because of a manufacturing defect within one
year from the date of the original purchase, Warrantor will furnish without charge the required replacement
)art.
n addition, if the sealed motor-compressor fails because of a manufacturing defect within the second through
fifth year from the date of original purchase, Warrantor will fumish without charge the required replacement
compressor.
In addition, if the steel heat exchanger fails because of a manufacturing defect within the second through fifth
year from the date of original purchase, Warrantor will fumish without charge a replacement heat exchanger.
Warrantor's obligations and liabilities under this warranty are limited to fumishing F.O.B. Warrantor factory or
warehouse at Warrantor designated shipping point, freight allowed to Buyer's city, replacement parts for
Warrantor's products covered under this warranty. Warrantor shall not be obligated to pay for the cost of lost
refrigerant. No liability shall attach to Warrantor until products have been paid for and then liability shall be
limited solely to the purchase price of the equipment under warranty shown to be defective.
THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER
WARRANTIES
AND LIABILITIES, WHETHER IN CONTRACT OR IN NEGLIGENCE,
EXPRESS
OR IMPLIED, IN LAW OR IN FACT, INCLUDING
IMPLIED WARRANTIES
OF
MERCHANTABILITY
AND FITNESS FOR PARTICULAR
USE, AND IN NO EVENT SHALL
WARRANTOR
BE LIABLE FOR ANY INCIDENTAL
OR CONSEQUENTIAL
DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to
state.
American Standard Inc.
Troup Highway
Tyler, TX 75711-9010
Attention: Manager, After Sales Support
GW-6064800
* This warranty is for commercial usage of said equipment and not applicable when the equipment is used for
a residential application. Commercial use is any application where the end purchaser uses the product for
other than ersonal famit or household ur oses.

Since Trane has a policy of continuous product and
product data improvement, it reserves the right to
change design and specification without notice.

Trane
6200 Troup Highway
Tyler, TX 75707-9010
A business of AmericanStandard

Page 24

Companies

Technical Literature - Printed in U.S.A.

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TRANE Package Units(both Units Combined) Manual L0904648

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