Energy Recovery Wheel - Daikin DPS 003 Manual

Check, Test and Start Procedures
Check, Test and Start Procedures
Set Up for Optimum Control
The Outdoor air sensor must be calibrated.
• Compare the MicroTech III OAT reading to an
external temperature measuring device. See
Appendix, Figure 58 on page 86
Menu and OA Temp
[ pink path.]
• If there is more than 1.0°F difference between the
two readings [Note the OAT reading should be taken
after the outdoor fans have been running for at least
1 minute.] then correct this difference on the keypad.
Go to Service Menus (Appendix,
Figure 57 on page 84), Sensor Offsets [
path,] find OA temp, and make the required adjustment.
The adjustment has a range setting of +/– 10.0°F.
Proper discharge and suction super heat is critical
• Suction super heat is monitored at the display screen.
Appendix, see Figure 54
on page 82, go to commission unit, expansion valve set
up, and super heat [
• Discharge super heat is not shown directly but is
the difference between discharge temperature and
saturated discharge temperature and both can be
monitored at the display screen. See
Figure 56.
— Go to commission unit
set up, and disch sat tmp [
— Go to view/set unit
temperatures, DRT1 [inverter compressor] and DRT
2 [fixed speed compressor] [
• If, after all motor speeds are constant +/– 5 hz for
15 minutes for either compressor, suction superheat
drops below 5°F, or discharge superheat drops below
18°F, or discharge superheat drops below 30°, then
proceed as follows.
— Set the SS Hi Base to 2°F. See
56, go to commission unit, expansion valve set up,
and SS Hi Base [
— Contact the factory to diagnose why super heat is
too low.
• If super heats do not reach steady state [less than
10°F variation for 2 minutes] then
— Set the SS Hi Base to 2°F. See
56. Go to commission unit, expansion valve set up,
and SS Hi Base [
— Contact the factory to diagnose why the unit is
hunting.
68
go to the Quick
Figure 54 and then
orange
and then Appendix, Figure 56
yellow path.]
Figure 54 and
(Figure 56), expansion valve
yellow path.]
(Figure 54 and Figure 55),
green path]
Figure 54 and
yellow path.]
Figure 54 and
yellow path.]
Air Balancing
Moving machinery
personal injury or death . Do not use a mechanically
driven tachometer to measure the speed of return fans
on this fan arrangement. Use a strobe tachometer.
The following should be performed by a qualified air balancing
technician:
1. Check the operating balance with the economizer
dampers positioned for both full outdoor air and
minimum outdoor air.
2. Verify that the total airflow will never be less than that
required for operation of the electric heaters or gas
furnace.
3. When the final drive adjustments or changes are
complete, check the current draw of the supply fan
motors. The amperage must not exceed the service factor
stamped on the motor nameplate
Minimum and maximum airflow/rpm settings can be adjusted
using the MicroTech III controller. Refer to OM 1141 for details.

Energy Recovery Wheel

Prestartup Checks
1. By hand, turn wheel clockwise (as viewed from the
pulley side) to verify wheel turns freely through 360°
rotation.
2. During rotation confirm wheel segments are fully
engaged in the wheel frame and segment retainers are
completely fastened
3. With hands and objects away from moving parts,
apply power and confirm wheel rotation. Wheel rotates
clockwise as viewed from the pulley side.
4. If wheel has difficulty starting, disconnect power and
Figure
inspect for excessive interference between the wheel
surface and each of the (4) diameter seals.
Diameter Seal Adjustment
Keep hands away from rotating wheel! Contact with
rotating wheel can cause physical injury .
Figure
1. Loosen diameter seal adjusting screws. See
2. Move adjustable diameter seals away from wheel.
3. Using a ¼ inch feeler gauge, adjust the diameter against
the wheel. See
4. Tighten diameter seal adjusting screws.
5. Apply power per the start up procedure.
WARNING
hazard . Can cause
WARNING
Figure 53.
severe
Figure 53.
IM 1125-5