BLK | BLK (HOT) | NOMINAL | |
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GRN | GRN |
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LINE WIRING CONNECTIONS
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THERMOSTAT | CONTROL |
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COMMON T’STAT CONNECTION
THERMOSTAT CONNECTIONS
ROOM |
| FURNACE |
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THERMOSTAT |
| CONTROL |
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COMMON T’STAT CONNECTION
SINGLE STAGE HEATING
THERMOSTAT CONNECTIONS
ROOM | FURNACE |
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THERMOSTAT | CONTROL |
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COMMON T’STAT CONNECTION
SINGLE STAGE HEATING AND
THERMOSTAT CONNECTIONS
FILTER PERFORMANCE
The airflow capacity data published in the “Blower Perfor- mance” table listed above represents blower performance WITHOUT filters. To determine the approximate blower per- formance of the system, apply the filter drop value for the fil- ter being used or select an appropriate value from the “Filter Performance” table shown below.
NOTE: The filter pressure drop values in the “Filter Perfor- mance” table shown below are typical values for the type of filter listed and should only be used as a guideline. Actual pressure drop ratings for each filter type vary between filter manufacturer.
FILTER PERFORMANCE - PRESSURE DROP INCHES W.C. AND (KPA)
| Minimum Opening Size |
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Airflow Range |
| Disposable |
| WASHABLE FIBER* |
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1 Opening | 2 Openings | 1 Opening | 2 Opening | 1 Opening | 2 Opening | 1 Opening | 2 Opening | |||||||||
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| Sq. in. | Sq. in. | In w.c. | Pa | In w.c. | Pa | In w.c. | Pa | In w.c. |
| Pa | In w.c. | Pa | In w.c. | Pa | |
0 - 750 | 230 |
| 0.01 | 2.5 |
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| 0.01 | 2.5 |
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| 0.15 | 37 |
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751 - 1000 | 330 |
| 0.04 | 10 |
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| 0.03 | 7.5 |
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| 0.20 | 50 |
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1001 - 1250 | 330 |
| 0.08 | 20 |
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| 0.07 | 17 |
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| 0.20 | 50 |
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1251 - 1500 | 330 |
| 0.08 | 20 |
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| 0.07 | 17 |
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| 0.25 | 62 |
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1501 - 1750 | 380 | 658 | 0.14 | 35 | 0.08 | 20 | 0.13 | 32 | 0.06 |
| 15 | 0.30 | 75 | 0.17 | 42 | |
1751 - 2000 | 380 | 658 | 0.17 | 42 | 0.09 | 22 | 0.15 | 37 | 0.07 |
| 17 | 0.30 | 75 | 0.17 | 42 | |
2001 & Above | 463 | 658 | 0.17 | 42 | 0.09 | 22 | 0.15 | 37 | 0.07 |
| 17 | 0.30 | 75 | 0.17 | 42 | |
* Washable Fibers are the type supplied with furnace (if supplied.
APPLYING FILTER PRESSURE DROP TO DETERMINE SYSTEM AIRFLOW
To determine the approximate airflow of the unit with a filter in place, follow the steps below:
1.Select the filter type.
2.Select the number of return air openings or calculate the return opening size in square inches to determine the proper filter pressure drop.
3.Determine the External System Static Pressure (ESP) without the filter.
4.Select a filter pressure drop from the table based upon the number of return air openings or return air opening size and add to the ESP from Step 3 to determine the total system static.
5.If total system static matches a ESP value in the airflow table (i.e. 0.20, 0.60, etc,) the system airflow corre- sponds to the intersection of the ESP column and Model/ Blower Speed row.
Unitary Products Group | 5 |
