York International P2HMX12F08001, Руководство по установке

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17
WIRING NOTES
CONTINUOUS FAN OPERATION
:
The ST9103 EFT has provisions to run
the blower motor continuously on a
speed lower than the cooling or heating
speeds. On a call for cooling, the fan
motor will switch to cooling speed, and
on a call for heating, the fan will switch to
heating speed, each over-riding the con-
tinuous low speed fan.
To obtain continuous low speed fan,
route a 16 gauge stranded, type TEW,
105°C wire from the C
ONT
Terminal on
the ST9103 EFT to the low speed or
medium low speed motor terminal. Both
wire ends will require ¼ inch quick con-
nects, (also known as “Faston” connec-
tors or ¼” spade connectors). For addi-
tional control over the continuous low
speed fan circuit, a SPST toggle switch
may be wired in series between the mo-
tor terminal and the ST9103 terminal.
The continuous low speed fan operation
operates at 115 vac. Use appropriate
wiring methods to prevent electrical
shock.
TURN OFF ELECTRICAL POWER TO
THE FURNACE WHEN SERVICING OR
ALTERING FURNACE WIRING.
FAILURE TO DO SO MAY RESULT IN
SEVERE PERSONAL INJURY, PROP-
ERTY DAMAGE OR DEATH
.
ACCESSORIES
:
The ST9103 EFT has provisions for sup-
plying 115 volt power to an electronic air
cleaner (EAC) as well as 115 volts to a
line voltage humidifier or humidifier step
down transformer. Both sets of terminals
are ¼ inch quick connect type, rated at 1
A each.
The EAC terminals provide power to an
electronic air cleaner whenever the heat-
ing or cooling speeds are activated.
Power is not provided when the continu-
ous speed is activated. If the electronic
air cleaner must run during continuous
low speed fan operation, wire the EAC
into the furnace L1 terminal.
NOTE
: It is seldom advisable to operate
an electronic air cleaner at the continu-
ous low speed because of the potential
for excess ozone generation.
The HUM terminals provide power to a
line voltage humidifier or humidifier step
down transformer when the oil burner
motor is operating.
THERMOSTAT HEATING
CONNECTIONS:
The thermostat connections “R” and “W”,
or “R
H
” and “W” connect to the “R” and
“W” screw terminals shown on the left
hand side of Figure 8, on the ST9103
EFT located in the control box mounted
on the right hand side of the vestibule.
Fig. 7:Thermostat Connections
ST9103
NOTE: All thermostat wires for both
heating and cooling connect to the fur-
nace at this point. A factory installed
wiring harness connects the heating con-
trol functions to the R7184 oil primary
control.
Figure 3, page 7, shows the detail of the
timed “Blower Off” dipswitch settings.
Figure 8 shows the dipswitch location
along the bottom edge of the control
board, just above the “Honeywell” label.