White Rodgers 50A56-956 Replacement Kit for York Single Stage Integrated Furnace Control Selectable Continuous Fan Speed Instruccion De Instalación
6
OPERATION
OPTION SWITCHES
The shunt jumper (E34) on the 50A56 control are used to
determine the length of the heat delay-to-fan-off periods. The
following table shows the time periods that will result from the
various positions.
determine the length of the heat delay-to-fan-off periods. The
following table shows the time periods that will result from the
various positions.
E3
4
DELAY
OFF
BLWR
180
120
90
60
180
120
90
60
180
120
90
60
180
120
90
60
Heat Delay-to-Fan-Off
Shunt Jumper E34
Manual Fan Speed
Shunt Jumper E33
Factory Setting
120 Seconds
Factory Setting
HI COOL
LO COOL
HEAT
60 Seconds 90 Seconds 180 Seconds
E3
3
SPEED
FAN
CONT
HI COOL
HEAT
LO COOL
HI COOL
HEAT
LO COOL
HI COOL
HEAT
LO COOL
HEAT MODE
In a typical system, a call for heat is initiated by closing the
Thermostat W contacts. This starts the control’s heating
sequence. The inducer blower and optional humidifier are
energized. After the pressure switch is proven the ignitor is
energized and the warm-up time begins.
The ignitor is allowed to warm up for a 17 seconds initial
warm-up.
The 120VAC ignitors with a 17-second warm-up time
must be used. These ignitors are specially designed to heat
up quickly at a low voltage condition without overheating at a
high voltage condition. At the end of the ignitor warm-up time,
both valves in the manifold gas valve are opened. Flame must
be detected within 7 seconds.
When flame is detected, the delay-to-fan-on period begins.
After the 30 seconds delay-to-fan-on period ends, the optional
electronic air cleaner is energized and the circulator fan is
energized at heat speed. When the thermostat is satisfied,
the gas valve is de-energized. After proof of flame loss,
the selectable heat delay-to-fan-off period begins and the
inducer blower remains energized to purge the system for 15
seconds.
When the purge is complete, the inducer blower and
humidifier are de-energized. After the delay-to-fan-off
period ends, the circulator fan and electronic air cleaner
are de-energized. If flame is not detected, both valves are
de-energized, the ignitor is turned off, and the control goes
into the “retry” sequence. The “retry” sequence provides a
15- second purge period following an unsuccessful ignition
attempt (flame not detected). After this wait, the ignition
sequence is restarted with a 27 second ignitor warm-up time.
The control will allow 2 retry periods before entering system
lockout.
Thermostat W contacts. This starts the control’s heating
sequence. The inducer blower and optional humidifier are
energized. After the pressure switch is proven the ignitor is
energized and the warm-up time begins.
The ignitor is allowed to warm up for a 17 seconds initial
warm-up.
The 120VAC ignitors with a 17-second warm-up time
must be used. These ignitors are specially designed to heat
up quickly at a low voltage condition without overheating at a
high voltage condition. At the end of the ignitor warm-up time,
both valves in the manifold gas valve are opened. Flame must
be detected within 7 seconds.
When flame is detected, the delay-to-fan-on period begins.
After the 30 seconds delay-to-fan-on period ends, the optional
electronic air cleaner is energized and the circulator fan is
energized at heat speed. When the thermostat is satisfied,
the gas valve is de-energized. After proof of flame loss,
the selectable heat delay-to-fan-off period begins and the
inducer blower remains energized to purge the system for 15
seconds.
When the purge is complete, the inducer blower and
humidifier are de-energized. After the delay-to-fan-off
period ends, the circulator fan and electronic air cleaner
are de-energized. If flame is not detected, both valves are
de-energized, the ignitor is turned off, and the control goes
into the “retry” sequence. The “retry” sequence provides a
15- second purge period following an unsuccessful ignition
attempt (flame not detected). After this wait, the ignition
sequence is restarted with a 27 second ignitor warm-up time.
The control will allow 2 retry periods before entering system
lockout.
If flame is established for more than 10 seconds after ignition,
the controller will clear the ignition attempt (or retry) counter.
If flame is lost after 10 seconds, it will restart the ignition
sequence.
During burner operation, a momentary loss of power of 50
milliseconds or longer will de-energize the main gas valve.
When power is restored, the gas valve will remain de-
energized and a restart of the ignition sequence will begin
immediately.
A momentary loss of gas supply, flame blowout, or a shorted
or open condition in the flame probe circuit will be sensed
within 2.0 seconds. The gas valve will de-energize and the
control will restart the ignition sequence.
Recycles will begin and the burner will operate normally if the
gas supply returns, or the fault condition is corrected.
If the control has gone into system lockout, it may be
possible to reset the control by a momentary power
interruption of one second or longer. Refer to
the controller will clear the ignition attempt (or retry) counter.
If flame is lost after 10 seconds, it will restart the ignition
sequence.
During burner operation, a momentary loss of power of 50
milliseconds or longer will de-energize the main gas valve.
When power is restored, the gas valve will remain de-
energized and a restart of the ignition sequence will begin
immediately.
A momentary loss of gas supply, flame blowout, or a shorted
or open condition in the flame probe circuit will be sensed
within 2.0 seconds. The gas valve will de-energize and the
control will restart the ignition sequence.
Recycles will begin and the burner will operate normally if the
gas supply returns, or the fault condition is corrected.
If the control has gone into system lockout, it may be
possible to reset the control by a momentary power
interruption of one second or longer. Refer to
SYSTEM
LOCKOUT FEATURES.
SINGLE STAGE COOL MODE
In a typical single stage cooling system, a call for cool is
initiated by closing the thermostat contacts, Y/Y2. This
energizes the control and the compressor. The cool delay-to-
fan-on period begins. After the delay period ends, the optional
electronic air cleaner is energized, and the circulator fan is
energized at high cool speed. After the thermostat is satisfied,
the compressor is de-energized and the cool mode delay-to-
fan-off period begins. After the delay-to-fan-off period ends,
the circulator fan and electronic air cleaner (optional) are
de-energized.
initiated by closing the thermostat contacts, Y/Y2. This
energizes the control and the compressor. The cool delay-to-
fan-on period begins. After the delay period ends, the optional
electronic air cleaner is energized, and the circulator fan is
energized at high cool speed. After the thermostat is satisfied,
the compressor is de-energized and the cool mode delay-to-
fan-off period begins. After the delay-to-fan-off period ends,
the circulator fan and electronic air cleaner (optional) are
de-energized.
TWO STAGE COOLING MODE
In a typical two stage cooling system, a call for cool is initiated
by closing the Y1 thermostat contacts. This energizes the
control and first stage of the compressor. The cool delay-to-
fan-on period begins.
After the delay period ends, the optional electronic air cleaner
is energized, and the low cooling circulator fan is energized.
When second stage cooling is called for the thermostat will
energize Y/Y2. This will energize the second stage of the
compressor and high cooling speed of the indoor circulating
fan. After the thermostat is satisfied, the compressor is de-
energized and the cool mode delay-to-fan-off period begins.
After the delay-to-fan-off period ends, the circulator fan and
electronic air cleaner (optional) are de-energized.
by closing the Y1 thermostat contacts. This energizes the
control and first stage of the compressor. The cool delay-to-
fan-on period begins.
After the delay period ends, the optional electronic air cleaner
is energized, and the low cooling circulator fan is energized.
When second stage cooling is called for the thermostat will
energize Y/Y2. This will energize the second stage of the
compressor and high cooling speed of the indoor circulating
fan. After the thermostat is satisfied, the compressor is de-
energized and the cool mode delay-to-fan-off period begins.
After the delay-to-fan-off period ends, the circulator fan and
electronic air cleaner (optional) are de-energized.