A & T International 1, Service Manual

Page: 13 / 24

13
Start Up Preparation
See “Common” section of this manual (on page 13-16) for
control details.
• Confirm dip switch settings are correct for your unit
(see page 6)
• Remove any tools or other obstructions
• Be sure the filter is in place
• Verify unit is level
•
S eparate any lines that contact each other
• R eplace cabinet front onto chassis
Test each power and circuit connection before powering up
system. Use unit mounted electronic thermostat controls
to start system. (See O perating I nstructions on Control )
Operation Section, Thermostat, Unit M ount or R emote.)
Refer to the specific model of Air Handler for more detailed
installation instructions.
Initial Start-up - Unit mount controls only
Unit will start in time delay. These are default settings of
unit mount I/R control microprocessor. Once temperature
and mode selections have been made, they are stored
in the microprocessor memory when the unit is switched
off. Next time unit is switched back on using the On/
Off switch, stored settings are used and unit resumes
operation.
COMMON TO ALL AIR HANDLERS
Infrared Control Operation
• EMI Air Handlers are equipped with a unit mount,
infrared compatible control package (optional on CCP) .
• User friendly, microprocessor control is designed to
protect system.
• Unit operation can be made by either keypad on unit
or by using optional hand held infrared controller
• There are two dipswitches on relay board that offer
different modes of operation. This allows unit to be
opperated as either cooling only or cooling/heating
After starting the unit, complete Test Unit Performance
Data sheet on page 17.
Save this information for future servicing. In event there is
a problem with the unit.
Perform the test again (if possible) and have both sets of
data ready when calling for assistance.