Circulating Air And Filters; Condensate Drain Connection - Daikin DCC Series Installation Instructions Manual

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.
u r
nits installeD On OOf
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 weatherproof. All holes in the unit base must be sealed
(including those around conduit nuts) to prevent water leak-
age into building. All required conduit and fittings are to be
field supplied.
Supply voltage to roof top unit must not vary by more than
10% of the value indicated on the unit's data plate. Phase
voltage unbalance must not exceed 2%. Contact your local
power company for correction of improper voltage or phase
unbalance.
ELECTRICAL ENTRANCE LOCATIONS
Unit is equipped with Single Point Power Block and Low
Voltage Block.
l v C
Ow OltaGe OntrOl
1. A 24V thermostat must be installed for unit
operation. It may be purchased with the unit or field
-supplied. Thermostats may be programmable or
electromechanical as required.
2. Locate thermostat or remote sensor in the conditioned
space where it will sense average temperature. Do
not locate the device where it may be directly exposed
to supply air, sunlight or other sources of heat. Follow
installation instructions packaged with the thermostat.
WARNING
. I
T MAY CAUSE
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OPs
w
irinG
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 feet. Use #16 AWG wire for 24V control
wiring runs not exceeding 125 feet. Use #14 AWG
wire for 24V control wiring runs not exceeding 200
feet. Low voltage wiring may be National Electrical
Code (NEC) Class 2 where permitted by local codes.
.
4. Route thermostat wires from sub-base terminals to
the unit. Control wiring should enter through the duct
panel (dimple marks entrance location). Connect
thermostat and any accessory wiring to low voltage
terminal block TB1 in the main control box.
NOTE: Field-supplied conduit may need to be installed
depending on unit/curb configuration. Use #18 AWG solid
conductor wire whenever connecting thermostat wires to
terminals on sub-base. DO NOT use larger than #18 AWG
wire. A transition to #18 AWG wire may be required before
entering thermostat sub-base.
NOTE: Refer to unit wiring diagrams for thermostat hookups.
The minimum supply pressure should not vary from that
shown in the table above because this could prevent the
unit from having dependable ignition. In addition, gas input
to the burners must not exceed the rated input shown on the
rating plate. Overfiring of the unit could result in premature
heat exchanger failure.

CIRCULATING AIR AND FILTERS

D
uCtwOrk
The supply duct from the unit through a wall may be installed
without clearance. However, minimum unit clearances must
be maintained (see "Clearances" section). The supply duct
should be provided with an access panel large enough to
inspect the air chamber downstream of the heat exchanger.
A cover should be tightly attached to prevent air leaks.
Ductwork dimensions are shown in the roof curb installation
manual.
If desired, supply and return duct connections to the unit
may be made with flexible connections to reduce possible
unit operating sound transmission.

CONDENSATE DRAIN CONNECTION

C
OnDensate
A 1" female NPT drain connection is supplied on the end of
the condensate pan, with an alternative connection on the
bottom of the pan. An external trap must be installed for
proper condensate drainage
9
D C
rain OnneCtiOn
DRAIN PLUG
(FACTORY-INSTALLED)
Drain Pan (Side View)
STANDARD
SIDE DRAIN