VENTILATION oR Air Cycling (continued)

SETTING DIP SWITCHES & CYCLE TIME TO MEET VENTILATION REQUIREMENTS

Figure 21 – VENT-TIMED DIP Switch Settings

 

Figure 22 – VENT-AUTO DIP Switch Settings

 

 

 

SYSTEM SETUP

SYSTEM SETUP

LOCAL

1

 

 

 

ON

EXTERNAL

LOCAL

1

 

 

ON

EXTERNAL

 

 

 

 

 

HVAC FAN OFF

2

 

 

 

HVAC FAN ON

HVAC FAN OFF

2

 

 

HVAC FAN ON

 

 

 

 

 

 

 

WHL HOUSE

3

 

 

 

 

CONVERTIBLE

WHL HOUSE

3

 

 

 

CONVERTIBLE

VENT-AUTO

4

 

 

 

 

VENT-TIMED

VENT-AUTO

4

 

 

 

VENT-TIMED

 

 

 

 

 

 

 

 

 

 

CYCLE PERIOD

CYCLE PERIOD

1

 

 

 

 

 

ON

30 MIN.

1

 

 

 

ON

30 MIN.

 

 

 

 

 

 

 

 

2

 

 

 

 

 

1 HOUR

2

 

 

 

1 HOUR

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

2 HOUR

3

 

 

 

 

2 HOUR

4

 

 

 

 

 

 

3 HOUR

4

 

 

 

 

3 HOUR

 

30

 

30

 

MIN.

 

MIN.

0

60

0

60

MIN

MIN.

MIN

MIN.

OFF

TEST

OFF

TEST

CYCLE TIME

CYCLE TIME

 

90-1538

 

90-1538

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..

OUTDOOR TEMPERATURE SENSOR INSTALLATION

The ODT should be installed outside in a shaded location (see Figure 23), or in the outside intake ventilation duct (see Figure 24)..

Figure 23 – ODT Mounted Outside

 

NORTH, EAST

 

 

OR WEST SIDE

OUTDOOR

 

OF HOME

TEMPERATURE

 

 

SENSOR

 

 

SENSOR

 

 

SENSOR

OUTDOOR

 

BRACKET

ABOVE EXPECTED

 

TEMPERATURE SENSOR

 

LEADS

SNOW LINE

 

Figure 24 – ODT Mounted in Intake Duct

CENTER LINE

36" MAX.

OUTSIDE WALL

B2202617-D

B2202617-E

14

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Image 14
Aprilaire 1770A, 1750A installation instructions Switch Notes, Outdoor Temperature Sensor Installation

1770A, 1750A specifications

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