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THERMOSTAT
INDOOR UNIT OUTPUT WITH 24VAC 1.5A
Fig. 62 — Cooling and Heating System Wiring
Diagram
THERMOSTAT
BLUE
RED
YELLOW
GREEN
WHITE
BROWN
Aux
Fig. 63 — Cooling and Heating Units Adopt Electric
Heating Device
CN18
CN15
CN22
G1 G2 G3 Y W G
R C
24V THERMOSTAT
Fig. 64 — 24V Thermostat Wiring Diagram
20
INDOOR UNIT
INDOOR UNIT
Aux
CN19
Specifications subject to change without notice.
Step 10 - Setting Static Pressure and Airflow
NOTE: Remove the middle panel from the unit and the control
panel cover to allow access to the IR Receiver.
The indoor fan coil units can be programmed to have different static pressures
settings or airflows; the factory default setting is SP1 (see below). Follow the
next steps to set the static pressure or Automatic Airflow using the Wireless
Remote Controller according to the installation conditions.
• The external static pressure can be manually changed to the fan
curves SP1, SP2, SP3, SP4.
• Choose the Automatic Airflow "AF" adjustment function to
automatically identify the static pressure and regulate the airflow amount.
Follow these instructions to configure:
1. Ensure the test run is done with a dry coil. If the coil is not dry, run
the unit for 2 hours in the FAN ONLY mode to dry the coil.
2. Check that both the power supply wiring and the duct installation have been
completed. Check that the supply air vent is properly positioned. Check that
the air filter is properly attached to the air return side passage of the unit.
3. If there is more than one air inlet and/or outlet, adjust the dampers
so that the airflow rate of each air inlet and outlet conforms to the
designed airflow rate. The wireless remote controller is required to
setup the static pressure of the indoor air handler units.
NOTE: When a system is using the 24V interface built-in, the indoor
unit's fan speed defaults to AUTO with the indoor unit's default logic.
The external static pressure should be selected using the wireless remote
controller (RG57F3(B)/BGEFU1), included with the indoor unit, by pointing
it toward the indoor unit's Infrared Receiver located inside the control box.
a.
Before using the service functions of the remote, turn OFF
the thermostat if connected.
b. Turn off the power to the indoor and outdoor units for 3
minutes.
c. Turn the power back on. Wait 1 minute and check the 24
volt Interface digital display. If the display reads "00", then
proceed. If not, make sure that the thermostat is turned OFF.
d. Remove the batteries from the RG57 wireless remote
controller and wait for the remote screen to clear or press
any button and the screen clears.
e. Reinstall the batteries.
f.
Within 30 seconds of replacing the batteries, simultaneously press
MODE and TIMER ON for five (5) seconds. You are now in the
SERVICE FUNCTION mode – and the remote display reads F1.
g. Manual static pressure or AUTOMATIC AIRFLOW
ADJUSTMENT selection:
1. For manual static pressure selection, press the DOWN arrow in
the center of the remote (labeled TEMP) to display E9. Press
MODE to set the external static pressure/airflow rate in the
range of 1~4. Press TIMER ON to confirm. NOTE: Reinstall
the middle panel and leave in place while the fan is running
to set the fan curve. The values on the remote controller
(1,2,3,4) correlate directly to the static pressure curves SP1,
SP2, SP3, SP4 (See "FAN PERFORMANCES AT VARYING
STATIC PRESSURES" on page 22). After selecting speed
power off the outdoor unit for 3 minutes to lock in the change.
2. If choosing the AUTOMATIC AIRFLOW ADJUSTMENT
function, with F1 in the remote display, press the DOWN arrow
once and d4 appears. Press TIMER ON to confirm. NOTE:
Reinstall the middle panel and leave in place while the fan is
running to establish automatic air flow adjustment. AF
appears in the unit's LED display. The system starts the fan for
the airflow automatic adjustment. The ON indicator flashes
when the fan runs during the AUTOMATIC AIRFLOW
ADJUSTMENT. After 3 to 6 minutes, the system stops
operating once the AUTOMATIC AIRFLOW
ADJUSTMENT is complete.
h. Remove the remote controller battery, and then re-insert the
battery after the remote controller screen goes blank. The
remote controller exits the SERVICE FUNCTION mode.
IM-40MBAA-02
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