16
• Profile D ramps up to 50% of the demand for 1/2 minute,
then ramps to 82% of the full cooling demand airflow and
operates there for approximately 7 1/2 minutes. The mo-
tor then steps up to the full demand airflow. Profile D has a
1/2 minute at 50% airflow OFF delay.
OFF
OFF
Figure 29
S5
S6
S5
S6
S5
S6
S5
S6
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Tap A*
Tap B
Tap C
Tap D
Dip Switches - Cooling Airflow Ramping Profiles
Figure 30
7. If an electric heater kit has been installed, determine the
heater kilowatt (kW) rating. Using the Electric Heat Airflow
table on page 14, set dip switches 9, 10, and 11 for the in-
stalled heater. The adjust setting (already established by the
cooling speed selection) also applies to the electric heater
kit airflow. Thus, the electric heater airflow is adjusted by
the same amount. This does not apply to systems setup with
a communicating thermostat. See Set-Up section in the A
IR
H
ANDLER
A
DVANCED
F
EATURES
M
ENU
on page 21. Verify selected
CFM by counting the green CFM LED blinks.
If an electric heater kit has not been installed, set dip switches
9, 10, and 11 to any valid heater kit setting (see airflow table
for valid settings). This will prevent an Ec Error code from
being displayed.
NOTE:
For installations not indicated in the preceding Temperature
Rise Tables, the following formula is to be used:
TR = (kW x 3412) x (Voltage Correction) / (1.08 x CFM)
Where: TR
= Temperature Rise
kW
= Heater Kit Actual kW
3412
= Btu per kW
Voltage Correction
=.96 (230 Supply Volts)
=.92 (220 Supply Volts)
=.87 (208 Supply Volts)
1.08
= Constant
CFM
= Measured Airflow
NOTE:
The Temperature Rise Tables can also be used to determine
the air handler airflow delivery. When using these tables for this
purpose set the room thermostat to maximum heat and allow the
system to reach steady state conditions. Insert two thermometers,
one in the return air and one in the supply air. The temperature
rise is the supply air temperature minus the room air temperature.
Use HKR specification sheets to determine the HKR available for a
given air handler.
18 Heat Kit Selection
For heat kit selection, see the Specification Sheet for each
specific Air Handler.
19 Troubleshooting
19.1 Electrostatic Discharge (ESD) Precautions
NOTE:
Discharge body’s static electricity before touching unit.
An electrostatic discharge can adversely affect electrical
components.
Use the following precautions during air handler installation and
servicing to protect the integrated control module from dam-
age. By putting the air handler, the control, and the person at
the same electrostatic potential, these steps will help avoid ex-
posing the integrated control module to electrostatic discharge.
This procedure is applicable to both installed and uninstalled (un-
grounded) blowers.
HIGH VOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
PERFORMING
ANY
SERVICE
OR
MAINTENANCE
.
WARNING
1. Disconnect all power to the blower. Do not touch the inte-
grated control module or any wire connected to the con-
trol prior to discharging your body’s electrostatic charge
to ground.
2. Firmly touch a clean, unpainted, metal surface of the air
handler blower near the control. Any tools held in a
person’s hand during grounding will be discharged.
3. Service integrated control module or connecting wiring fol-
lowing the discharge process in step 2. Use caution not to
recharge your body with static electricity; (i.e., do not move
or shuffle your feet, do not touch ungrounded objects, etc.).
If you come in contact with an ungrounded object, repeat
step 2 before touching control or wires.
4. Discharge your body to ground before removing a new con-
trol from its container. Follow steps 1 through 3 if install-
ing the control on a blower. Return any old or new con-
trols to their containers before touching any ungrounded
object.
19.2 Diagnostic Chart
Refer to the
Troubleshooting Chart
at the end of this manual for
assistance in determining the source of unit operational prob-
lems. The 7 segment LED display will provide any active fault
codes. An arrow printed next to the display indicates proper
orientation (arrow points to top of display). See Figure 31.
7 Segment
Diagnostic
Display
Figure 31
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