GENERAL OPERATING PROCEDURES

TM 9-4120-428-14

0005 00

REFRIGERANT

SIGHT

GLASS

13. Turn the MODE SELECTOR switch to OFF. Observe that all air conditioner functions cease.

GENERAL OPERATING PROCEDURES

The Model F9000H-4SPFI air conditioner is designed for operation in a wide range of climatic conditions either continuously

or intermittently. The amount of operator attention required will vary depending on specific local conditions for each

installation. Under usual conditions, the air conditioner will be set up for the appropriate mode of operation at the beginning

of a season and will only need starting, stopping, and minor adjustments for the rest of the season. The following table

provides the recommended initial control settings to establish the desired mode of operation. Minor adjustments may be

required to obtain the desired shelter temperature and mixture of re-circulated to fresh air or the airflow patterns of

conditioned air inside the shelter.

Table 1. Initial Operator Control Settings.

MODE

CONDITIONED FABRIC

TEMPERATURE

FRESH AIR

RETURN

SELECTOR

COVER

AIR SUPPLY

SELECTOR

DAMPER

AIR

LOUVER

Ventilation with 100% VENT

Any Setting

Fully Closed

Fully Open

Optional

Recirculated Air

Ventilation with

VENT

Any Setting

Partially Open Partially

Optional

Rolled Up

Make-up Fresh Air

Closed

Ventilation with 100% VENT

Any Setting

Fully Open

Fully Closed

Optional

Rolled Up

Fresh Air

Heating with 100%

LOW or

Desired Temperature Fully Closed

Fully Open

Slightly Upward

Optional

Recirculated Air

HIGH HEAT

Heating with Make-up LOW or

Desired Temperature Partially or

Partially or

Slightly Upward

Rolled Up

Fresh Air

HIGH HEAT

Fully Closed

Cooling with 100%

COOL

Desired Temperature Fully Closed

Fully Open

Slightly Upward

Rolled Up

Recirculated Air

Cooling with Make-up COOL

Desired Temperature Partially or

Partially or

Slightly Upward

Rolled Up

Fresh Air

Fully Closed

Any Mode with Make- Desired Mode Desired Temperature Fully Open

Partially or

Optional

Rolled Up

up Air Through NBC

Fully Closed

Filters

OPERATION IN VENTILATION MODE

1. Roll up and tie the canvas cover.

2. Open evaporator discharge louvers.

3. Turn the ventilation damper actuator to open the damper door.

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