Daikin DFC Series, Installation Instructions Manual

Page: 8 / 52

8
CAUTION
To avoid property damage or personal injury due to fire, use
only copper conductors.
CAUTION
To prevent improper and dangerous operation due to wiring
errors, label all wires prior to disconnection when servic -
ing controls. Verify proper operation after servicing.
NOTE: A weather-tight disconnect switch, properly sized for the unit
total load must be 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 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.
• Connect power wiring to the middle contactor within the
main control box or power block, if equipped.
15-25 TON TSTAT POWER AND LOW VOLTAGE
TERMINAL LOCATIONS
15-25 TON DDC POWER AND LOW VOLTAGE TERMINAL LOCATIONS
NOTE: Depending on the options installed, the location of the
components may vary in some models.
WARNING
Failure of unit due to operation on improper line voltage or
with excessive phase unbalance constitues product abuse and
is not covered by the warranty. It may cause 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.
Units installed on Roof Tops
Main power and low voltage wiring may enter the unit through
the side or through the roof curb. Install conduit connectors at the
desired entrance locations. External connectors must be weath -
erproof. All holes in the unit base must be sealed (including those
around conduit nuts) to prevent water leakage into building. All
required conduit and fittings are to be field supplied. For wiring
and/or gas connections entering through roof curb, the through
the base kit would be required (TTBCK03).
Supply voltage to roof top unit must not vary by more than 10% of
the value indicated on the unit data plate. Phase voltage unbal -
ance must not exceed 2%. Contact your local power company for
correction of improper voltage or phase unbalance.