Trane 4DCZ5024F1060A Installation And Operation Manual page 22

U U n n i i t t I I n n s s t t a a l l l l a a t t i i o o n n
D D i i s s c c o o n n n n e e c c t t S S w w i i t t c c h h
Provide an approved weatherproof disconnect within
close proximity and w w i i t t h h i i n n s s i i g g h h t t o o f f t t h h e e u u n n i i t t . If
disconnect must be mounted to the cabinet, the
location shown in Table 15, p. 22
one considered.
O O v v e e r r C C u u r r r r e e n n t t P P r r o o t t e e c c t t i i o o n n
The branch circuit feeding the unit must be protected
as shown on the unit's rating plate.
P P o o w w e e r r W W i i r r i i n n g g
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 Table 13, p.
2. Connect the high voltage wires to the appropriate
contactor terminals. Single phase units use a two
(2) pole contactor and three phase units use three
(3) pole contactor. Connect the ground to the
ground lug on the chassis. See
Ensure all connections are tight.
G G R R O O U U N N D D I I N N G G : : T T H H E E U U N N I I T T M M U U S S T T B B E E E E L L E E C C T T R R I I C C A A L L L L Y Y
G G R R O O U U N N D D E E D D I I N N A A C C C C O O R R D D A A N N C C E E W W I I T T H H L L O O C C A A L L C C O O D D E E S S
O O R R T T H H E E N N A A T T I I O O N N A A L L E E L L E E C C T T R R I I C C C C O O D D E E . .
N N o o t t e e : : 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, Field Wiring Diagram for location in
7, p. 24.
Table 13. Power Wiring
Run power supply lines through weather-tight
conduit and secure to unit with strain relief.
22
should be the only
22.
Table 14, p. 22.
Figure
Table 14. Power Connections
Table 15. Mounted Disconnect Location
C C o o n n t t r r o o l l W W i i r r i i n n g g ( ( C C l l a a s s s s I I I I ) )
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
grommet on the unit. See Unit Clearance Graphics for
the control entry (24V Entry) location. Make
connections as shown on the unit wiring diagram.
Do not short thermostat wires since this will damage
the control transformer.
Refer to Table 16, p. 23 for recommended wire sizes
and lengths for installing the unit thermostat. 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.
Contactor
Unit Ground
Lug
18-BG07D1-1B-EN