To Restore Defaults; To Replace The Controller's Battery; Fluid Piping System; Check Valve - Carrier 09FC020 Installation, Start-Up And Maintenance Instructions

To Restore Defaults

CAUTION
This erases all archived information and user-configuration
settings. You will have to reconfigure all custom settings. It is
recommended to restore the factory defaults only under the
guidance of Carrier Control Systems Support.
To erase volatile memory data and restore factory default configu-
ration settings:
1. Turn off the AppController's power switch.
2. Put the Factory Defaults jumper on. See Fig. 32 for location
of factory default jumper.
3. Turn on the AppController's power switch.
4. Remove the Factory Defaults jumper.

TO REPLACE THE CONTROLLER'S BATTERY

To determine when to replace the battery, remove power and
measure the voltage. If the voltage is below 2.9 volts, replace the
battery.
Use CR2032 battery for replacement.
CAUTION
Power must be ON to the controller when replacing the battery,
or your date, time and trend data will be lost. Software and
settings will also be lost. A new clipping file must be loaded.
Same is true for loss of power if battery is dead or missing.
1. Remove the battery from the controller, making note of the
battery's polarity.
2. Insert the new battery, matching the battery's polarity with the
polarity indicated on the controller.

Fluid Piping System

The 09FC internal fluid piping directs the flow in order to provide
the required cooling. Several components comprise this piping
system. See Fig. 19-21. A by-pass line bypasses the coils. Coil
supply and return lines connect the fluid to the coils. A 3-way by-
pass valve directs the flow between the by-pass line and the supply
line. A check valve included in the return line prohibits reverse
flow.

Check Valve

This device is provided in the Return Line. It is a wafer style check
valve. There are no user accessible settings.

3-Way Bypass Valve

A modulating valve consisting of an actuator linked to two butter-
fly valves, one in the bypass line and one to the coil supply line is
factory installed. This device controls the supply of fluid to the
coils. It is controlled by the controller through relays to open and
close the valve.
The linkage between the two valves is critical to the operation of
this unit. The linkage must be set as noted in Fig. 40.
Actuator
Free Cooling Valve
Fig. 40 — 3-Way Valve (Configuration for
09FC020-040, 09FC050-080 Series Piping)
The actuator can be manually operated with a handle inserted into
the actuator. See Fig. 41.
Valve Handle
Manual Operation
Fig. 41 — Manual Valve Operation
IMPORTANT: If the manual handle is inserted in the
actuator, the valve will not respond to open and close
commands from the controller.

Valve Linkage Adjustment

This information will help return the valve linkage to the proper
configuration to assure optimum performance of the unit.
Figure 40 identifies the components of the 3 way valve. See
Fig. 42 and 43 for bypass and free cooling details. The linkage
consist of threaded rod, connectors, and a nut for locking the link-
age at the proper length. To set up the linkage:
1. Use the handle supplied on the side of the actuator to rotate
the "free cooling valve" to the closed position, full clockwise,
0 degrees on the actuator display. The handle is inserted into
the hole in the top of the valve marked "Open/Close". A
waterproof cap covers this hole and must be unscrewed and
removed first.
2. Move the "bypass valve" to the open position. See the dia-
gram to reference the shaft and shaft arm position. Verify this
by looking in the entering water connection if possible.
3. Adjust the linkage to fit the valve arms and connect with the
pins.
4. Using the handle, rotate the actuator to the full CCW, 90
degree position.
5. Verify the "bypass valve" is fully closed. If not able to view in
the entering water connection, temporarily remove the
56
Bypass Valve
9.8" (Ref.)
CL to CL of Pins
Entering Water
Connection
Valve Handle
Storage Location