Description of Control
AH-Passport I/O Control Operations Manual
2
L-2232 ENGLISH
D
ESCRIPTION
OF
C
ONTROL
See Figure 1 and Table 1 on page 3 to identify all parts of the control.
P
OWER
Press the Power button once to engage the system. The display is blank when the system is off and indicates current room
temperature when the system is on.
S
ET
P
OINT
Press the Up or Down button to set the desired room temperature. To view the set point, momentarily press and release the Up
or Down button.
F
AN
Fan-speed operation is automatic, allowing fan speed to decrease as set-point temperature is approached in the Cool Mode.
The fan operates at low speed when set point is satisfied.
Normally the automatic fan speed operation is reversed in the Heating Mode, however, you can program the fan to operate the
same as in the Cooling Mode.
Press the Fan button to select manual fan speeds if you want to override automatic operation. You can program the fan to run
only during a cool or heat cycle, otherwise the fan runs constantly.
M
EMORY
The AH-Passport I/O has nonvolatile memory requiring no batteries or backup power. When power is lost, the operating
parameters are retained indefinitely. When power is restored, the control resumes operating as last programmed.
