Daikin DM80SE, Service Instructions Manual

Page: 10 / 34

SYSTEM OPERATION
10
Accessory Wiring
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the furnace, the wiring must
conform to all local codes, and have a minimum temperature
rating of 105°C. All line voltage wire splices must be made
inside the furnace junction box.
The integrated control module humidifier terminals (HUM)
are energized with 115 volts whenever the induced draft
blower is energized. The integrated control module electronic
air cleaner terminals (EAC) are energized with 115 volts
whenever the circulator blower is energized.
24 VOLT THERMOSTAT WIRING
NOTE:
Low voltage connections can be made through either
the right or left side panel. Wire routing must not interfere
with circulator blower operation, filter removal, or routine
maintenance.
A 40 V.A. transformer and an integrated electronic control
are built into the furnace to allow use with most cooling
equipment. Consult the wiring diagram, located in the
Technical Manual or on the blower door for further details
of 115 Volt and 24 Volt wiring.
THERMOSTAT WIRING - SINGLE-STAGE
The following drawing illustrates the typical field wiring for
a heat only single stage system and a single stage heating/
single stage cooling system. Refer to the following figures
for proper connections to the integrated control module.
Furnace
Control
Furnace
Control
Remote
Condensing
Unit
Heating
Room
Thermostat
Heating/Cooling
Room Thermostat
W W
Typical Field Wiring (24 VAC Control Circuit)
CONTINUOUS FAN OPERATION
The single stage furnace control will energize the heating
circulator fan speed when the fan switch on the thermostat
is turned to the "ON" position.
CIRCULATOR BLOWER SPEED ADJUSTMENT
WARNING
HIGH VOLTAGE
E
LECTRICAL COMPONENTS ARE CONTAINED IN BOTH
COMPARTMENTS.
T
O AVOID ELECTRICAL SHOCK, INJURY OR
DEATH, DO NOT REMOVE ANY INTERNAL COMPARTMENT COVERS
OR ATTEMPT ANY ADJUSTMENT.
C
ONTACT A QUALIFIED
SERVICE AGENT AT ONCE IF AN ABNORMAL FLAME
APPEARANCE SHOULD DEVELOP.
DM80SE*U
Connect the correct motor leads to the COOL, HEAT, and
PARK terminals. If the heating speed equals cooling speed,
use the jumper wire provided. All unused motor leads that
are not connected to "PARK" terminals on the control must
be taped to prevent shorts.
DM80SN*U with PCBBF241 CONTROL BOARD
Furnace must have a 120 VAC power supply properly
connected and grounded. Proper polarity must be
maintained for correct operation. An interlock switch
prevents furnace oper ation if the blower door is not in
place. Keep the blower access door in place except for
inspection and maintenance.
The integrated furnace control board is equipped with two
push-button switches used to access & navigate menus for
furnace setup & settings. The 3 x Seven Segment Displays
on the control board will show the current selection.
Upon power-up of the control board, all Seven segments
will be illuminated displaying “8 8 8”. After power-up the
displays will show “I d L”, idle, or stand-by mode. The
control is now ready to receive demands from the room
thermostat. Refer to Status Menu in this manual for
interpretation of items displayed in the status menu.
Quick Start
Initial set up of outdoor systems are required to be
configured through the control board. Navigate to OdS
menu using the push buttons to properly configure the
outdoor system. Selections for AC1, AC2, HP1, HP2 must
be made to enable specific fan speeds and thermostat
signals to function.
NOTE: Equipment type (Single-stage cooling, Two-
stage cooling, Single-stage heat pump, Two-stage
heat pump) MUST be setup through the OdS menu
by the installer for proper system operation.
Using Push-Button Switches
All user settings may be accessed by two push-button
switches on the control board. The switches are identified
as “menu” & “option”. To enter the main menu, press the
“menu” switch. Each time the menu switch is pressed the