Daikin DSC Series Installation Instructions Manual page 7

The main power supply wiring to the unit and low voltage wiring
to accessory controls must be done in accordance with these in-
structions, the latest edition of the National Electrical Code (ANSI/
NFPA 70), and all local codes and ordinances.
The unit is factory wired for the voltage shown on the unit's data
plate. Refer to model nomenclature in Appendix B for voltage re-
quirement for your unit.
NOTE: If supply voltage is 208V, lead on primary of transformer(s)
must be moved from the 230V to the 208V tap. Refer to wiring
diagram on unit for details.
Main power wiring should be sized for the minimum circuit
ampacity shown on the unit's data plate. Size wires in accordance
with the ampacity tables in Article 310 of the National Electrical
Code. If long wires are required, it may be necessary to increase
the wire size to prevent excessive voltage drop. Wires should be
sized for a maximum of 3% voltage drop.
T
O AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE
ONLY COPPER CONDUCTORS.
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
. W
CONTROLS IRING ERRORS CAN CAUSE IMPROPER AND
. V
DANGEROUS OPERATION
.
SERVICING
NOTE: A weather-tight disconnect switch, properly sized for the
unit total load, must be field or factory installed. An external field
supplied disconnect may be mounted on the exterior panel.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
power leads at the point of distribution in accordance with
the unit's data plate.
• The unit must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the latest
edition of the National Electrical Code (ANSI-NFPA 70). A
ground lug is provided for this purpose. Size grounding
conductor in accordance with Table 250-95 of the National
Electrical Code. Do not use the ground lug for connecting
a neutral conductor.
• Remove plug in panel located at the condenser end of
unit and route conduit to control box. Remove plug in
control box and connect power wiring to the contactor
closest to the entrance. If Single Point kit is used, refer to
Installation Instructions supplied with kit.
CAUTION
CAUTION
ERIFY PROPER OPERATION AFTER
LOW VOLTAGE
BLOCK
LOW VOLTAGE
ENTRANCE
POWER THRU
THE CURB
LOW VOLTAGE/THERMOSTAT CONNECTIONS
NOTE: Some models may vary from illustration.
Models with electric heat are equipped
with a power block for field connections.
CONTROL BOX CONNECTIONS
Note: Depending on the options installed, the location of the components
may vary in some models.
FIELD SUPPLIED WIRING
DDC CONTROL BOX
FIELD SUPPLIED WIRING
F
AILURE OF UNIT DUE TO OPERATION ON IMPROPER LINE VOLTAGE
OR WITH EXCESSIVE PHASE UNBALANCE CONSTITUTES PRODUCT
ABUSE AND IS NOT COVERED BY THE WARRANTY
SEVERE DAMAGE TO THE UNIT ELECTRICAL COMPONENTS
Areas Without Convenience Outlet
It is recommended that an independent 115V power source be
brought to the vicinity of the roof top unit for portable lights and
tools used by the service mechanic.
NOTE: Refer to local codes for requirements. These outlets can
also be factory installed.
7
MAIN POWER
CONTROL BOX
GROUND
LUG
WARNING
. I
T MAY CAUSE
.