Daikin RoofPak RPS Series Installation And Maintenance Manual page 97

17. Before closing (connecting) the power disconnect
switch, open (disconnect) the following unit control
circuit switches:
a. Main Control Panel
– Turn system switch S1 to OFF.
– Electric heat units: turn switch HS1 to OFF.
b. Furnace Control Compartment
– Turn furnace switch S3 to OFF.
– Main Control Panel Switch S7 to OFF.
18. If the DAC or SCC unit does not have an optional zone
temperature sensor (ZNT1) connected to it, you may
need to change the keypad entry under Setup/Service \
Unit Configuration \ Space Sensor= from YES to NO.
NOTE: If desired, you can significantly reduce all MicroTech
III internal control timers by the changing the entry
under keypad menu Setup/Service\Unit Configuration\
Timer Settings\Service= from "0 min" to "X min" where X is
the number of minutes you want the unit to operate
with fast timers.
Power Up
1. Close the unit disconnect switch. With the control system
switch S1 in the OFF position, power should be available
only to the control circuit transformer (TI) and the
compressor crankcase heaters.
2. Turn the Switch S1 to ON. Power should now be
supplied to the control panel and the LEDs on MCB1
should follow the normal startup sequence.
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Check, Test, and Start Procedures
Fan Start-Up
1. Verify all duct isolation dampers are open. Unit mounted
isolation dampers may be mounted in the supply or
return sections.
2. Place the unit into the "Fan Only" mode through the
keypad menu System Summary\System\Ctrl Mode= Fan Only.
3. Turn Switch S7 to ON. The controller should enter the
"Startup Initial" operating state. If the fan does not run:
a. Check fuses F1 and F3.
b. Check the manual motor protectors or that the
circuit breakers have not tripped.
c. Check the optional phase monitor.
4. If the fans are equipped with optional spring isolators,
check the fan spring mount adjustment. When the fans
are running they should be level. Refer to
RDT Spring Mount Hold-Down Fasteners on page
5. Verify the rotation is correct.
6. Verify the DHL safety is opening at a pressure
compatible with duct working pressure limits.
NOTE: The supply and return fan drives usually are selected
for operation in the drive's midspeed range. The return
fan drives are usually shipped with fixed pitch sheaves
that will provide the selected fan speed; however, the
supply fan drives are usually shipped with variable
pitch sheaves that are adjusted to provide the minimum
fan speed. Both drives should be adjusted for proper
airflow during air balancing. For more information, refer
to Air Balancing on page
97 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Figure 75:
54.
101.