AHRI (-)98VA060M317USA, Installation Instructions Manual

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INTEGRATED FURNACE CONTROL
SUPPLy AND OUTDOOR AIR TEMPERATURE SENSORS
the sensor was determined to be present and then is
opened the control should display a fault "82" . The fault is
a level 1 fault and will not inhibit furnace operation. Also, if
the resistance between the terminals is determined to be
out of range to a low resistance and a valid thermistor
value was sensed on the same power cycle, a fault "82"
is to be displayed on the seven segment displays.
If the resistance between the outdoor air terminals (OAT)
is determined to be out of range to a high resistance, it
shall be interpreted as an uninstalled supplied outdoor air
sensor and shall not cause an error condition unless a
valid thermistor value was previously sensed on the same
power cycle. If the sensor was determined to be present
and then is opened, the control should display a fault
"84" . The fault is a level 1 fault and will not inhibit furnace
operation.
Also, if the resistance between the terminals on the OAT is
determined to be out of range to a low resistance, a fault
"84" is to be displayed on the seven segment displays
only if a valid thermistor value was previously sensed on
the same power cycle.
Fault codes "82" and "84" shall only be present for three
minutes after the fault is detected. After three minutes has
expired, the fault will no longer be set even if the condition
creating the fault is still present. These faults are also only
logged into the fault buffer one time. Should the sensor
error later clear and then appear again the same
sequence as noted previously will be repeated.
17. AUxILIARy INPUTS (COMMUNICATING SySTEMS
ONLy) (T5) (SEE FIGURE 55)
Terminal T5 is provided for field installation of up to
two auxiliary switches. The auxiliary inputs shall be
used to provide a means of using traditional drain pan
switches, smoke detectors, freeze switches, etc. The
inputs are to be labeled Aux 1 and Aux 2. The switch
inputs are for communicating systems only. One or
both inputs can be configured at the communicating
thermostat as either normally-opened or normally
closed contacts. System operation when the contacts
either open or close can be configured at the
communicating thermostat.
A resistance of greater than 1k ohms to common shall
be detected as an open switch and a resistance of
less than 100 ohms shall be recognized as a closed
switch.
18. THERMOSTAT INPUTS (T2) – THERMOSTAT
WIRING DIAGRAMS
Both communicating and legacy thermostats are to be
connected at terminal block T2.
A. COMMUNICATING SySTEMS
The furnace is capable of communicating with a
thermostat and condenser to improve cooling and
heat-pump airflow, displaying active faults and