66307-YIM-B-0606

 

 

TABLE 11: ELECTRIC HEAT MINIMUM SUPPLY AIR

The Power Exhaust factory installed option is for Down Flow

 

IMPERIAL

 

 

application only.

 

 

 

There are two field installed Power Exhaust accessories:

 

 

 

 

 

 

 

 

HEATER

UNIT MODEL SIZE, NOMINAL TONS

 

 

1. Down Flow application.

 

 

 

 

 

 

 

kW

 

VOLTAGE

7.5

10

 

 

 

 

 

 

 

 

2. Horizontal Flow application that requires the purchase of

 

 

MINIMUM SUPPLY AIR CFM

 

 

 

 

 

 

 

 

 

 

a barometric relief hood.

9

 

 

2250

N/A

 

 

 

 

 

 

 

 

 

 

RAIN HOOD

18

 

 

2250

3000

 

 

 

 

 

 

 

 

24

 

380/415

2250

3000

All of the hood components, including the filters, the gasket-

 

 

 

 

 

 

36

 

 

2250

3000

ing and the hardware for assembling, are packaged and

 

 

 

 

 

 

located between the condenser coil section and the main unit

54

 

 

N/A

3000

 

 

cabinet, if the unit has factory installed options. If field

 

 

 

 

 

 

 

 

 

 

 

 

 

METRIC

 

 

installed accessories are being installed all parts necessary

 

 

 

for the installation comes in the accessory.

 

HEATER

UNIT MODEL SIZE, NOMINAL TONS

 

 

 

 

 

kW

 

VOLTAGE

7.5

10

 

 

 

 

MINIMUM SUPPLY AIR M3S

 

 

 

9

 

 

1.06

N/A

 

 

 

 

 

18

 

 

1.06

1.42

 

 

 

 

 

24

 

380/415

1.06

1.42

 

 

 

 

 

36

 

 

1.06

1.42

 

 

 

 

 

54

 

 

N/A

1.42

 

 

 

 

 

MOTORIZED OUTDOOR DAMPER

The Motorized Outdoor Damper can be a factory installed option or a field installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to com- plete the assembly. Field installed Motorized Outdoor Damper accessories include complete instructions for instal- lation.

ECONOMIZER

The Economizer can be a factory installed option or a field installed accessory. If factory installed, refer to the instruc- tions included with the outdoor air hood to complete the assembly. Field installed Economizer accessories include complete instructions for installation.

There are two Economizer options:

1.Down Flow application with barometric relief hood stan- dard.

2.Horizontal Flow application that requires the purchase of a barometric relief hood.

POWER EXHAUST

The Power Exhaust can be a factory installed option or a field installed accessory. If factory installed, refer to the instruc- tions included with the outdoor air hood to complete the assembly. Field installed Power Exhaust accessories include complete instructions for installation.

ECONOMIZER AND POWER EXHAUST SET POINT ADJUSTMENTS AND INFORMATION

Remove the top rear access panel from the unit. Locate the economizer control module, where the following adjustments will be made.

Extreme care must be exercised in turning all set point, maximum and minimum damper positioning adjustment screws to prevent twisting them off.

MINIMUM POSITION ADJUSTMENT

Check that the damper blades move smoothly without binding; carefully turn the Minimum Position Adjust screw (found on the damper control module) fully clock- wise and then set the thermostat indoor fan switch to the ON position and then OFF or energize and de-energize terminals “R” to “G”.

With the thermostat set to the indoor fan ON position or terminals “R” to “G” energized, turn the Minimum Posi- tion Adjusting screw (located on the damper control module) counterclockwise until the desired minimum damper position has been attained.

ENTHALPY SET POINT ADJUSTMENT

The enthalpy set point may now be set by selecting the desired set point shown in the Enthalpy Set Point Adjustment Figure 20. Adjust as follows:

For a single enthalpy operation carefully turn the set point adjusting screw (found on the damper control mod- ule) to the "A", "B", "C" or "D" setting corresponding to the lettered curve of the Enthalpy Set Point Adjustment Figure 20.

20

Unitary Products Group

Page 20
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York BP 090, BP120 installation manual Electric Heat Minimum Supply AIR