High Altitude Installation; Air Filter Installation; Electrical Wiring; Electrical Connections - Trane 4YCY4042C Installer's Manual

High Altitude Installation

Unit nameplate ratings are based on equipment operation from
sea level to 2000 feet elevation above sea level.
required for high altitude installation, please refer to below chart for
rating information.
Table 4. High Altitude Derate Chart
HIGH ALTITUDE DERATE CHART NAT.
Unit Input
115k 2001 3000
High stage 112100 104100
Low stage 84000 78100
90k
High stage 87700 81500
Low stage
65700 61100
70k
High stage
68200 63300
Low stage 51100 47600
60k
High stage 58500 54300
Low stage 43800 40700
Inputs shown are with factory orifices @ 3.5"WC (High Fire)
1.8"WC (Low Fire)
Natural Gas heating value of 950 btu/cuft.
For LP installations. Models that require #49 orifices, for
altitudes from 7000 - 8000' orifices must be changed to #50.

Air Filter Installation

The packaged unit requires an air filter. The unit does not come
with a factory installed filter rack in it, however, two filter frame ac-
cessories are offered that will allow the installation of a filter within
the unit, BAYFLTR101 & BAYFLTR201. Otherwise a field supplied
filter rack must be installed by the installer in the return duct work.
Refer to Table 5 to determine filter sizes for field supplied filter racks.
Table 5. Filter Sizes (field supplied filter rack)
NOMINAL
UNIT
CFM
4YCZ6036 1200
4YCZ6048 1600
4YCZ6060 2000
*Filters must be installed in the return air system. The above square
footages are based on 300 F.P.M. face velocity. If permanent filters are
used, size per mfg. Recommendation with clear resistance of 0.05" W.C.
IMPORTANT: Air filters and media wheels or plates shall meet the test
requirements in UL 900.

Electrical Wiring

▲ !
HAZARDOUS VOLTAGE, MOVING PARTS, AND GAS
Bodily injury can result from high voltage electrical compo-
nents, fast moving fans, and combustible gas. For protection
from these inherent hazards during installation and service,
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 technician's re-
sponsibility to recognize these hazards and proceed safely.
No orifice changes
Altitude (In Feet)
4000 5000 6000 7000
96200 88100 86900 85600 85100
72100 66100 65100 64200 63800
75200 69000 68000 67000 66500
56400 51700 51000 50200 49900
58500 53600 52900 52100 51800
43900 40200 39600 39100 38800
50100 46000 45300 44700 44300
37600 34500 34000 33400 33200
FILTER
FILTER* SIZE
RESISTANCE
(Sq. Ft.)
("W.C.")
4 0.08
5.33 0.08
6.67 0.08
WARNING
NOTE: This unit is factory wired for 230V. See wiring dia-
gram in SERVICE FACTS for 208V conversion.

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.
NOTE: For branch circuit wiring (main power supply to unit
disconnect), determine wire size for the length of run using the
circuit ampacity found on the unit nameplate and the N.E.C.
8000
For more than 3 conductors in a raceway or cable, see the
N.E.C. for derating the ampacity of each conductor.

Electrical Power

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

Disconnect Switch

Provide an approved weatherproof disconnect within close proxim-
ity and within sight of the unit.
to the cabinet, the location shown in Figure 21 should be the only
one considered.

Over Current Protection

The branch circuit feeding the unit must be protected as shown on
the unit nameplate.

Power Wiring

The power supply lines must be run in weather-tight conduit to the
disconnect and into the side 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.
1. Remove the CONTROL/HEAT access panel. Pass the power
wires through the Power Entry hole in the end of the unit.
See Figure 19.
2. Connect the high voltage wires to the appropriate contactor lug
terminals. Single phase units use a two (2) pole contactor
and three phase units use two (2) pole contactor and a Blue
lead wire. Connect the ground to the ground lug on the chas-
sis. See Figure 20. Be sure all connections are tight.
GROUNDING: THE UNIT MUST BE ELECTRICALLY
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR
THE NATIONAL ELECTRIC CODE.
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.
Installer's Guide
Figure 19. Power Wiring
If disconnect must be mounted
Run power
supply Lines
through weath-
er-tight conduit
and secure to
unit with strain
relief
Page 19