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Refer to the unit wiring diagram for electrical connections. When
installed, the unit must be electrically grounded in accordance with
local codes or in the absence of local codes, with the National
Electrical Code, ANSI/NFPA No. 70, and/or the CSA C22.1
Electrical Code. Ensure low voltage connections are waterproof.
For unit protection, use a fuse or hacr circuit breaker that is
in excess of the circuit ampacity, but less than or equal to the
maximum overcurrent protection device. DO NOT EXCEED THE
MAXIMUM OVERCURRENT DEVICE SIZE SHOWN ON UNIT
DATA PLATE.
All line voltage connections must be made through weatherproof
fittings. All exterior power supply and ground wiring must be in
approved weatherproof conduit. Low voltage wiring from the unit
control panel to the thermostat requires coded cable. See below
for ground level and rooftop wiring.
Unit Voltage
Rated
Minimum Supply
Voltage
Voltage
208/230V
The unit transformer is factory connected for 230V operation. If
the unit is to operate on 208V, reconnect the transformer primary
lead as shown on the unit wiring diagram. The induced draft
blower on some models is equipped with a low speed 230V lead
(blue) and a low speed 208V lead (black). If equipped, connect
the induced draft blower low speed 208V lead (black) in place of
the low speed 230V lead (blue). Place the unused 230V lead on
the "PARK" terminal located on ignition control.
Single Phase Units. Connect two leads to terminals L1 & L2 in the
electrical control section,
Three Phase Units. Connect three leads to terminals L1, L2 &
L3 in the electrical control section, using wire sizes specified in
"Wiring table".
BRANCH CIRCUIT
AMPACITY
SUPPLY WIRE
LENGTH - FEET
200
150
100
50
WIRING TABLE
Maximum Supply
Voltage
197
253
15
20 25 30
35
40 45 50
6
4
4
4
3
3
8
6
6
4
4
4
10
8
8
6
6
6
14
12 10 10
8
8
Airflow Conversion
Units can easily be converted from horizontal to down-discharge
airflow delivery. In down-discharge or high static installations, the
installer should measure the total external static and review the
blower performance charts before performing the installation. In
some installations it will be necessary to change the blower speed
to provide proper air flow.
Horizontal Air Flow
Single phase models are shipped without horizontal duct covers. If
needed, these kits may be ordered through Daikin's Service Parts
department.
Down Discharge Applications
Cut insulation around bottom openings and remove panels from
the bottom of the unit, saving the screws holding the panels in
place.
NOTE: Single phase models require installation of horizontal duct
kit #20464501NGK (medium chassis) and #20464502NGK (large
chassis). See "Unit Dimensions"section for chassis sizes.
Ductwork
Duct systems and register sizes must be properly designed for the
C.F.M. and external static pressure rating of the unit. Ductwork
should be designed in accordance with the recommended
methods of Air Conditioning Contractors of America Manual D
(Residential) or Manual Q (Commercial). All ductwork exposed to
the outdoors must include a weatherproof barrier and adequate
insulation.
A duct system should be installed in accordance with Standards
of the National Board of Fire Underwriters for the Installation of
Air Conditioning, Warm Air Heating and Ventilating Systems.
Pamphlets No. 90A and 90B.
The supply duct from the unit through a wall may be installed
2
2
without clearance. However, minimum unit clearances as shown
in the appendix must be maintained. The supply duct should be
3
3
provided with an access panel large enough to inspect the air
4
4
chamber downstream of the heat exchanger. A cover should be
6
6
tightly attached to prevent air leaks.
For duct flange dimensions on the unit refer to the Unit Dimension
illustration in the appendix.
11
Circulating Air and Filters
Duct Cover Installation
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