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

U R T
NITS INSTALLED ON OOF OPS
Main power and low voltage wiring may enter the unit through
the condenser end or through the roof curb. Install conduit con-
nectors at the desired entrance locations. External connectors must
be weatherproof. All holes in the unit base must be sealed (in-
cluding those around conduit nuts) to prevent water leakage 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 unbal-
ance must not exceed 2%. Contact your local power company for
correction of improper voltage or phase unbalance.
* (6 Ton - 34 1/4")
RETURN
POWER THRU
THE CURB
47 1/2"
ELECTRICAL ENTRANCE AND THRU CURB
L V C W
OW OLTAGE ONTROL IRING
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.
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
HIGH VOLTAGE ENTRANCE
(REMOVE PLUG)
12 3/8"
30 1/4"*
1:4
LOW VOLTAGE ENTRANCE
3.5 DIA.
4 1/2"
7 1/2"
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 condenser
panel opening indicated in "Electrical Entrance" figure.
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.

CIRCULATING AIR AND FILTERS

D
UCTWORK
The supply duct from the unit through a wall may be installed with-
out clearance. However, minimum unit clearances must be main-
tained (see "Clearances" section). The supply duct should be pro-
vided with an access panel large enough to inspect the air cham-
ber 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 D C
ONDENSATE RAIN ONNECTION
A 3/4" female NPT drain connection is supplied on the end of the
unit and bottom of the drain pan for condensate piping. An exter-
nal trap must be installed for proper condensate drainage.
DRAIN
CONNECTION
UNIT
FLEXIBLE
TUBING-HOSE
OR PIPE
A POSITIVE LIQUID
SEAL IS REQUIRED
Drain Connection
Install condensate drain trap as shown. Use 3/4" drain line and
fittings or larger. Do not operate without trap.
H D
ORIZONTAL RAIN
Drainage of condensate directly onto the roof may be acceptable;
refer to local code. It is recommended that a small drip pad of
either stone, mortar, wood or metal be provided to prevent any
possible damage to the roof.
8
2" MINIMUM
3" MINIMUM