Allied A97USMV, Installation Instructions Manual

Page: 45 / 78

506887-01 Page 45 of 78 Issue 1213
Switches 14 through 19 - Heating Mode Blower Speed
These switches are factory set at the OFF position which
provides 100% of normal speed during HIGH HEAT demand,
70% of normal speed during MIDRANGE HEAT demand
and 40% of normal speed during LOW HEAT demand.
Switches 14, 15 and 16 are used to adjust the LOW HEAT
blower motor speed. Switches 17, 18 and 19 are used to
adjust the HIGH HEAT blower motor speed. Table 18
provides the heating mode blower speeds that will result
from different switch settings.
On Board Links
On Board links must be clipped (when applicable) before
unit is placed into operation with a non-communicating
thermostat.
On Board Link W914 DS to R
On Board link W914, is a clippable connection between
terminals DS and R on the integrated control. W914 must
be cut when installed with a thermostat which features
humidity control. Refer to Table 22 for operation sequence
in applications for this unit, a thermostat which features
humidity control and a single speed outdoor unit. Table 23
gives the operation sequence in applications with a two speed
outdoor unit.
On Board Link W951 R to O
On Board link W951 is a clippable connection between
terminals R and O on the integrated control. W951 must be
cut when the furnace is installed in applications which include
a heat pump unit and thermostat which features dual fuel
use. If the link is left intact, terminal “O” will remain energized
eliminating the HEAT MODE in the heat pump.
On Board Link W915 Y1 to Y2
On Board link W915 is a clippable connection between
terminals Y1 and Y2 on the integrated control. W915 must
be cut if two stage cooling will be used. If the link is not cut
the outdoor unit will operate in second stage cooling only.
Diagnostic LED
The seven segment diagnostic LED displays operating
status, target airflow, error codes and other information. The
table on page 58 lists diagnostic LED codes.
Diagnostic Push Button
The diagnostic push button is located adjacent to the seven
segment diagnostic LED. This button is used to enable the
Error Code Recall mode and the Field Test mode. Press
the button and hold it to cycle through a menu of options.
Every five seconds a new menu item will be displayed. When
the button is released, the displayed item will be selected.
Once all items in the menu have been displayed, the menu
resumes from the beginning until the button is released.
Error Code Recall Mode
Select “E” from the menu to access the most recent 10 error
codes. Select “c” from the Error Code Recall menu to clear
all error codes. Button must be pressed a second time while
“c” is flashing to confirm command to delete codes. Press
the button until a solid “ ” is displayed to exit the Error Code
Recall mode.
Field Test Mode
Use the diagnostic push button to scroll through the menu
as described above. Release the button when the LED
flashes “-” to select the Field Test mode.
While in the Field Test mode the technician can:
•
Initiate furnace ignition and move to and hold low-fire
rate by applying a R to W1 jumper.
•
Initiate furnace ignition sequence and move to an hold
high-fire rate by applying a jumper from R to W1 and
W2.
•
Initiate furnace ignition sequence and move to and hold
mid-fire rate by applying a jumper to R and W2.
•
Apply then remove the jumper from R to W1 and W2 to
change the firing rate from low fire to mid fire and high
fire.
•
A vent calibration sequence can be initiated even if a
thermostat signal is not present. Press and hold the
push button until a solid “C” is displayed. Release the
button and calibration will begin. The furnace will perform
the high-fire and low-fire pressure switch calibrations
and display “CAL”. After calibration , the LED will return
to the flashing “-” display.
During Field Test mode operation, all safety switches are
still in the circuit (they are not by-passed) and indoor blower
performance and timings will match DIP switch selections.
Current furnace firing rate, indoor blower CFM and flame
signal will be displayed. To exit the Field Test mode, press
and hold the button. The menu will resume from the
beginning. Also, cycle the main power to exit the Field Test
mode. The integrated control will automatically exit the Field
Test mode after 45 minutes of operation
Low Heat Blower Speeds
Table 20
High Heat Blower Speeds
Table 21