Programming, Checking filter monitor, Resetting filter monitor – Robertshaw 9720 User Manual

Page 19: Programming filter monitor

7. Press SET button. The display will show AUTO with FAN.

8. Press either

∨ or ∧ button to adjust the fan setting to be in AUTO

(fan controlled by system when required for heating or cooling)
or ON (fan remains on continuously) for the individual daily
setpoint you are programming.

9. Press SET button.

10. Repeat steps 3-9 for the remaining DAY, EVE, and NIGHT settings.

11. Press SYSTEM button for opposite program (HEAT or COOL).

12. Press SET button and repeat above steps for opposite program.

NOTE: Program changes made to setpoint times, temperatures, or fan
operation are not saved in memory unless you finish the operation by
pressing the SET button after each entry as shown above.

NOTE: When programming opposite season, remember that both
programs use the same time and programmable fan settings.

MON

MORN

FAN ON

MON

MORN

AUTO FAN

MON

MORN

FAN ON

SET

SYSTEM

SET

PROGRAMMING

1. Press SET and FILTER buttons at the same time. Release both

buttons.The display will show:

2. Press

∨ or ∧ button to change filter hour setting (between 0 to 960

in 60 hour increments). The default is 240 hours (based on
average 30 day month at 8 hours per day fan operation). A
setting of 0 hours disables this feature.

3. Press SET button to save setting.

Checking Filter Monitor

1. Press FILTER button. The current hours of fan operation since

last reset are shown for reference.

2. The main display will return after a few seconds.

Resetting Filter Monitor

1. When filter needs to be serviced, "Check Filter" will show in main

display indicating that the hours of fan operation have met your
programmed filter servicing interval.

2. After servicing the filter, repeat steps 1-3 to reset/reprogram your filter monitor.

CHECK
FILTER

Programming Filter Monitor

The filter monitor keeps track of the total time the system fan has been in operation during the heating or cooling modes.
The "Check Filter" message appears when the hours of fan operation equals your programmed filter monitor hours setting.

SET

FILTER

SET

FILTER

PROGRAMMING