Evaporator Coil Txv; Airflow; Regular Maintenance - Daikin DAX Series Installation Instructions Manual

NOTE: The use of a heat shield when brazing
is recommended to avoid burning the serial
plate or the finish on the unit. Heat trap or wet
rags should be used to protect heat sensitive
components such as service valves and TXV valves.

Evaporator Coil TXV

NOTE: Thermal Expansion Valve (TXV) Bulb
is not permanently connected to the suction
from the factory. After suction and liquid line
tubing is brazed in the field, the TXV bulb must
be attached and insulation to the suction line(s)
inside the cabinet at the 10 or 2 o'clock position.
This location will be different depending on the
orientation of the unit, vertical or horizontal.
Always locate the TXV bulb on the top of the
suction tube at 10 or 2 o'clock.
Check condensing unit / heat pump instructions for
charging method.

Airflow

The blower motors are factory programmed with 5 torque
settings, T1-T5. Both blowers operate at the same torque
setting regardless of the unit's mode of operation. The unit
is capable of operating at up to two independent torque
settings depending on the mode of operation.
SPEED TAP
1 LOW SPEED COOLING (AC/HP)
2 HIGH SPEED COOLING (AC/HP)
3 DEFAULT SPEED FOR HP, OR AC/HP WITH
4
5
Prior to changing the torque settings, refer to airflow tables
and heater kit CFM requirements to verify correct torques
settings that satisfy the installation requirements. To
change torque settings, turn the power off to the unit and
move the yellow and/or brown wires to the desired torque
tap (T1-T5). Refer to the wiring diagram provided with the
unit for a visual aid.
DESCRIPTION
AHRI RATING
DEFAULT SPEED FOR G, Y1
AHRI RATING
DEFAULT SPEED FOR ALL, Y2
HIGH SPEED HEATING
ELECTRIC HEAT
FAN ONLY
HIGH COOL, HIGHER SPEED

Regular Maintenance

The only item to be maintained on a regular basis by the
user is the circulating air filter(s). Filter should be cleaned
or replaced regularly.
HIGH VOLTAGE
Disconnect all power before servicing or
installing this unit. Multiple power sources
may be present. Failure to do so may cause
property damage, personal injury or death.
Routine maintenance is essential for trouble free operation
of this airhandler. A few preseason checks can eliminate
costly repairs and down time.
A certified service technician must perform all services
mentioned below.
1. Check and change air filters as needed
2. Clean the evaporator coil and check for duct leaks.
3. Check for proper charge and (or) for refrigerant leaks.
If these few precautions are observed and maintained, this
airhandler can provide years of trouble free service.
9
WARNING