TABLE 8ÐAIR CONDITIONING (A/C) AIRFLOW SETUP SWITCH POSITION

AIR

 

 

A/C SETUP

 

 

ALLOWABLE FURNACE MODEL SETUP

 

 

CONDITIONER

CFM AIRFLOW

SWITCH POSITION

 

 

 

 

 

 

 

 

 

 

 

 

(TONS)

 

A/C-1

 

A/C-2

 

A/C-3

042040

042060

042080

060080

060100

060120

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Default

1200 or

OFF

 

OFF

 

OFF

3 Tons

3 Tons

3 Tons

5

Tons

5

Tons

5

Tons

2000

 

 

1200 CFM

1200 CFM

1200 CFM

2000 CFM

2000 CFM

2000 CFM

 

 

 

 

 

 

1-1/2

600

ON

 

OFF

 

OFF

X

X

X

 

Ð

 

Ð

Ð

 

2

800

OFF

 

ON

 

OFF

X

X

X

 

X

 

X

 

X

2-1/2

1000

ON

 

ON

 

OFF

X

X

X

 

X

 

X

 

X

3

1200

OFF

 

OFF

 

ON

X

X

X

 

X

 

X

 

X

3-1/2

1400

ON

 

OFF

 

ON

X

X

X

 

X

 

X

 

X

4

1600

OFF

 

ON

 

ON

Ð

Ð

Ð

X

 

X

 

X

 

5

2000

ON

 

ON

 

ON

Ð

Ð

Ð

X

 

X

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XÐIndicates allowable selection.

TABLE 9ÐCONTINUOUS FAN (CF) AIRFLOW SETUP SWITCH POSITION

CONTINUOUS

 

 

CF SETUP

 

 

ALLOWABLE FURNACE MODEL SETUP

 

 

SWITCH POSITION

 

 

 

FAN (CFM)

 

 

 

 

 

 

 

 

CF-1

 

CF-2

 

CF-3

042040

042060

042080

060080

060100

060120

 

 

 

Default

OFF

 

OFF

 

OFF

565*

515*

690*

690*

860*

1035*

600

ON

 

OFF

 

OFF

X

X

X

Ð

Ð

Ð

800

OFF

 

ON

 

OFF

X

X

X

X

X

X

1000

ON

 

ON

 

OFF

X

X

X

X

X

X

1200

OFF

 

OFF

 

ON

X

X

X

X

X

X

1400

ON

 

OFF

 

ON

X

X

X

X

X

X

1600

OFF

 

ON

 

ON

Ð

Ð

Ð

X

X

X

2000

ON

 

ON

 

ON

Ð

Ð

Ð

X

X

X

*Add 15% additional CFM when Bypass Humidifier switch SW-3 on control board is used. XÐIndicates allowable selection.

1

OFF

A95198

Fig. 45ÐExample of Setup Switch in OFF Position

1.Remove main furnace door and blower access panel.

2.Locate CF setup switches on control center. (See Fig. 25.)

3.Determine desired continuous fan airflow.

4.Use Table 9 or wiring schematic to determine proper setup position of CF switches. (See Fig. 24 and 45.)

NOTE: The CF switches are factory set to provide continuous fan airflow equal to low-heat mode.

5.Replace main furnace door and blower access panel.

C. Setup Switches (SW)

The control center has 8 setup switches that may be set to meet the application requirements. Position these setup switches for the appropriate requirement.

1.Remove main furnace door and blower access panel.

2.Locate setup switches on control center. (See Fig. 25.)

3.See Table 10 for setup switch description. (See Fig. 24 and 45.)

4.Replace main furnace door and blower access panel.

NOTE: If a bypass humidifier is used, setup switch SW-3 (BPH) should be in ON position. This prevents nuisance limit trips caused by the increased temperature in return air resulting from bypass.

NOTE: If modulating dampers are used, setup switch SW-5 (MZ) should be in ON position. This allows furnace control center to compensate for modulating dampers. The control re-calibrates for new system static conditions once every minute while operating in low-heat or continuous fan modes.

III.PRIME CONDENSATE TRAP WITH WATER

CAUTION: Condensate trap must be PRIMED or proper draining may not occur. The condensate trap has 2 internal chambers which can ONLY be primed by pour- ing water into the inducer drain side of condensate trap.

1.Remove upper inducer housing drain connection cap. (See Fig. 46.)

2.Connect field-supplied 1/2-in. ID tube to upper inducer housing drain connection.

3.Insert field-supplied funnel into tube.

4.Pour 1 quart of water into funnel/tube. Water should run through inducer housing, overfill condensate trap, and flow into open field drain. (See Fig. 47.)

5.Remove funnel and tube from inducer housing and replace drain connection cap and clamp.

Ð35Ð

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Bryant 355M-40-5 Ðair Conditioning A/C Airflow Setup Switch Position, Ðcontinuous FAN CF Airflow Setup Switch Position

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