11
PCBAG127 (Stage Delay)
WARNING
T
O AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO THE UNIT MUST BE
POLARIZED AND GROUNDED.
CAUTION
T
O AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE T O FIRE, USE
ONLY C OPPER CONDUCTORS.
CAUTION
T
O PREVENT IMPROPER AND DANGEROUS OPERATION DUE TO WIRING ERRORS,
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS.
V
ERIFY PROPER OPERATION AFTER SERVICING.
For unit protection, use a time delay 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.
Rated Voltage Minimum Supply
Voltage
Minimum Supply
Voltage
208/230V
197
253
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.
NOTE:
A dedicated ground wire must be run from the
unit to the electrical panel.
DO NOT use gas piping, or conduit as an electrical
ground.
Low voltage wiring from the unit control panel to the ther-
mostat requires coded cable. See below for ground level
and rooftop wiring.
NOTE:
The unit transformer is factory connect ed for 240V
operation. If the unit is to operate on 208V, reconnect
the transformer primary lead as shown on the unit wiring
diagram.
NOTE: 5 ton models - The induced draft blower on
some models is equipped with a low speed 240V
lead (blue) and a low speed 208V lead (black). If the
unit is to operate on 208V, connect the induced draft
blower low speed 208V lead (black) in place of the low
speed 240V lead (blue). Place the un used 240V lead
on the “PARK” terminal located on ignition control.
NOTE: Some units are equipped with a single pole
con tactor. Caution must be exercised when servicing
as only one leg of the power supply is broken with
the contactor.
1 Phase Models: Connect incoming power leads to
terminals L1 & L2 on contactor in the electrical control
section, using wire sizes specified in wiring table.
3 Phase Models: Connect incoming power leads to
terminals L1, L2 & L3 on contactor in the electrical control
section, using wire sizes specified in wiring table.
CIRCULATING AIR AND FILTERS
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.
For 3-phase models only, remove supply and return duct
covers which are attached to the unit as shown below.
