IMPORTANT NOTE: THE EVAPORATOR COIL IS COATED WITH OILS THAT MAY DISSOLVE STYROFOAM AND CERTAIN TYPES OF PLASTICS. THEREFORE, A REMOVAL PUMP OR FLOAT SWITCH MUST NOT CONTAIN ANY OF THESE MATERIALS.
Tip: Priming the “P” trap may avoid improper draining at the initial installation and at the beginning of the cooling season.
ACHIEVING 2% LOW LEAKAGE RATE
Ensure that the Neoprene gasket with PSA remains intact on all surfaces that the access panels are secured to. These surfaces are the entire length of the wrapper and areas between the upper tie plate, upper and lower access panels. Be sure that upper access panel breaker insert gasket is intact and also flowrator gasket is installed on the lower access panel. An additional drain hole cover is required.
ARUF/ARPF MOTOR
Motor Speed Adjustment
The motors in all ARUF and ARPF motors are
NOTE: In some models, not all speed taps are allowable for certain electric heat applications. Refer to air handler Series and Ratings plate for minimum speed.
AEPT MOTOR
This section references the operation characteristics of the AEPT model motor only. The ECM control board is factory set with dipswitch #4 in the “ON” position and all other dipswitches in the “OFF” position. For most applications this setting is to be changed according to the electric heat size and the outdoor unit selection.
The AEPT product uses a General Electric ECMTM motor. This motor provides many features not available on the traditional PSC motor. These features include:
•Improved Efficiency
•Constant CFM
•Soft Start and Stop
•Improved Humidity Control
Motor Speed Adjustment
Each ECMTM blower motor has been preprogrammed for operation at 4 distinct airflow levels when operating in Cooling, H.P. Heating, Backup Heating (Electric Heating), and Backup + H.P. Heating. Each mode has 4 levels to deliver different Air Flow CFM [L/s]. The adjustment is performed by changing the dipswitch(s) either to an “OFF” or “ON” position.
Dipswitch Functions
The AEPT air handler motor has an electronic control that contains an eight (8) position dip switch. The function of these dipswitches are shown in Table 9.
Dipswitch Number | Function | |
|
| |
1 | Electric Heat | |
2 | ||
| ||
3 | N/A | |
4 | Indoor Thermostat | |
5 | Cooling & Heat Pump CFM | |
6 | ||
| ||
7 | CFM Trim Adjust | |
8 | ||
|
Table 9
CFM Delivery
Tables 10 and 11 show the CFM output for dipswitch combinations
| Model |
| Switch |
| Switch |
| EMERGENCY |
| HP | ||
|
|
| 1 |
| 2 |
| (ELECTRIC) | w/BACKUP | |||
|
|
|
|
| HEAT |
| HEAT | ||||
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| OFF |
| OFF |
| 1100 |
| 1210 |
|
| AEPT30 |
|
| ON |
| OFF |
| 850 |
| 935 |
|
|
|
|
| OFF |
| ON |
| 700 |
| 775 |
|
AEPT36 |
|
| OFF |
| OFF |
| 2050 |
| 2150 |
| |
| and |
|
| ON |
| OFF |
| 1750 |
| 1835 |
|
AEPT60 |
|
| OFF |
| ON |
| 1600 |
| 1680 |
| |
|
|
|
| ON |
| ON |
| 1200 |
| 1260 |
|
|
| TABLE 10 - ELECTRIC HEAT CFM |
|
| |||||||
|
|
|
|
|
|
|
| ||||
| Model |
| Switch | Switch | Nominal Cooling | CFM |
| ||||
|
|
|
| 5 |
| 6 |
| Tonnage |
|
| |
|
|
|
| OFF | OFF | 2 ½ |
| 1100 |
| ||
| AEPT30 |
| ON | OFF | 2 |
| 800 |
| |||
|
|
|
| OFF | ON | 1 ½ |
| 600 |
| ||
| AEPT36 |
| OFF | OFF | 5 |
| 1800 |
| |||
| and |
| ON | OFF | 4 |
| 1580 |
| |||
| AEPT60 |
| OFF | ON | 3 ½ |
| 1480 |
| |||
|
|
|
| ON | ON | 3 |
| 1200 |
|
Table 11 - Cooling and Heat Pump CFM
Thermostat “Fan Only Mode”
During “Fan Only Mode” operation, the CFM output is 30% of the cooling setting.
CFM Trim Adjust
Minor adjustments can be made through the dip switch combination of
CFM | Switch 7 | Switch 8 |
+10% | ON | OFF |
OFF | ON | |
|
|
|
Table 12
10 | 08/04 | |
|
|