VENTIlATION OR AIR CyClING
(CONTINUED)
Switch Notes:
• Setting the Cycle Time Cycle Period will result in constant ventilation .
• Setting the Cycle Time to OFF will disable ventilation.
1 . Set VENT-AUTO and VENT-TIMED switch . VENT-AUTO restricts ventilation based on outdoor temperature (incoming air conditions) and
VENT-TIMED allows ventilation regardless of outdoor air conditions . The VENT-AUTO configuration requires the installation of the Model 8052
outdoor temperature sensor (ODT) .
2 . Set the Cycle Period by moving the 1/2, 1, 2, or 3 hour switch to the ON position . The Cycle Period is the time over which a ventilation cycle
will occur . The default position is 1 hour .
3 . Set the Cycle Time, determined in
Table 5
, by rotating the potentiometer between 0 minutes and 60 minutes . The Cycle Time determines how long
during each Cycle Period ventilation will occur . Once the ventilation time requirement is met, ventilation will not occur until the next cycle period .
SETTING DIP SWITCHES & CyClE TIME TO MEET VENTIlATION REQUIREMENTS
fIGURE 22 – VENT-TIMED DIP Switch Settings
90-1538
ON
1
234
4
3
2
1
ON
HVAC FAN OFF
PRIMARY
VENT-AUTO
VENT-TIMED
HVAC FAN ON
2 HOUR
3 HOUR
30 MIN.
1 HOUR
SYSTEM SETUP
CYCLE PERIOD
EXTERNAL
OFF
PRIMARY/SECONDARY
TEST
LOCAL
CYCLE TIME
0
60
MIN.
MIN
30
MIN.
fIGURE 23 – VENT-AUTO DIP Switch Settings
90-1538
MIN.
30
MIN
MIN.
60
0
CYCLE TIME
LOCAL
TEST
PRIMARY/SECONDARY
OFF
EXTERNAL
CYCLE PERIOD
SYSTEM SETUP
1 HOUR
30 MIN.
3 HOUR
2 HOUR
HVAC FAN ON
VENT-TIMED
VENT-AUTO
PRIMARY
HVAC FAN OFF
ON
1234
4
3
2
1
ON
OUTDOOR TEMPERATURE SENSOR INSTAllATION
The ODT should be installed outside in a shaded location (see
figure 24
), or in the outside intake ventilation duct (see
figure 25
) .
fIGURE 24 – ODT Mounted Outside
fIGURE 25 – ODT Mounted in Intake Duct
NORTH, EAST
OR WEST SIDE
OF HOME
OUTDOOR
TEMPERATURE
SENSOR
SENSOR
SENSOR
BRACKET
ABOVE EXPECTED
SNOW LINE
OUTDOOR
TEMPERATURE SENSOR
LEADS
36" MAX.
CENTER LINE
OUTSIDE WALL
B2202617-D
B2202617-E
17
