Daikin Rebel Applied DPSA - Hot Water and Steam Heat; Air Balancing

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www.DaikinApplied.com 81 IM 1287-6 • REBEL APPLIED ROOFTOP
Hot Water and Steam Heat
The Hot Water or Steam valve actuator should open the valve.
The hot water or steam valve is open when the valve stem is
up. If the unit loses power, the spring in the actuator should
drive the valve wide open.
Air Balancing
DANGER
Moving Machinery hazard. Moving components such as, fans, dampers,
energy recovery devices can cause serious 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.
WARNING
Rotating parts can cause serious injury or death. Replace all fan guards
that are temporarily removed for service.
Air balancing should be performed by a qualied air balancing
technician.
The following should be performed as part of the air balancing
procedure:
1. Check the operating balance with the economizer
dampers positioned for both full outdoor air and minimum
outdoor air.
2. Verify that the total airow will never be less than that
required for operation of the electric heaters.
3. For VAV units that have fan tracking control, adjust
the supply/return fan balance by using the MicroTech
controller’s built-in, automatic capability.
When all start-up procedures are completed, set the controls
and program the MicroTech controller for normal operation.
Use the following list as a guide; some items may not apply to
your unit.
1. Set the heating and cooling parameters as required for
normal unit operation.
a. Main Menu\Commission Unit\HtgClgChgovr Set-Up\
Ctrl Temp Scr = RAT, Space, OAT, None based
on application needs. Refer to OM-1288 for
recommendations
b. Main Menu\Commission Unit\CoolingSet-Up\Occ
Clg Spt & DAT Clg Spt.
c. Main Menu\Commissioning Unit\Heating Set-Up\Occ
Htg Spt & DAT Htg Spt.
2. Set the low ambient compressor lockout setpoint as
required in menu, Main Menu\Commission Unit\Cooling
Setup\Clg Lo Oat Lk =. Do not set it below 50°F (10°C)
unless the unit is equipped for low ambient operation.
3. Set the high ambient heat lockout temperature setpoint,
Main Menu\Commission Unit\Heating Setup\Htg Hi OAT Lk
as required.
4. Set the alarm limits as required in Main Menu\
Commission Unit\Alarm Congurations\Alarm Limits.
5. Set the compressor lead/lag function as desired using
keypad menu Main Menu\Advanced Menus\Cooling
Setup\Lead Circuit and Main Menu\Advanced Menus\
Cooling Setup\Load Method = Lead Load or Cross Load
CAUTION
If the unit has hot gas bypass on circuit #1 only, lead circuit must always be
circuit #1 and Load method set to Lead Load.
6. Set the duct static pressure control parameters as
required in keypad menu Main Menu\Quick Menu\ SAF
DSP Spt =___ in.; RAF DSP Spt=___ in.; BldgSP Spt=___
in. based on application and unit conguration.
7. Set the RF/EF Control Parameters based on the
application
a. If RF/EF Control = Tracking, then set the fan
tracking parameters as required in keypad menu.
Main Menu\ Commission Unit\RF/EF Setup\ Sup Fan
Max, RF @ SF Max, Sup Fan Min, RF @ SF Min.
b. If Main Menu\ Commission Unit\RF/EF Setup\ RF/EF
Ctrl = BSP, Set the building static pressure control
parameters as required in keypad menu location
Main Menu\Quick Menu\BldgSP Spt=___ in. based
application and unit conguration.
c. If Main Menu\ Commission Unit\RF/EF Setup RF/EF
Ctrl = DSP, Set the building static pressure control
parameters as required in keypad menu Main
Menu\ Commission Unit\RF/EF Setup \RAF DSP
Spt=. Based application and unit conguration
NOTE: This conguration is only available with a modulating
Exhaust air Damper.
d. Main Menu\ Commission Unit\RF/EF Setup\ RF/EF
Ctrl = OAD, then set the fan tracking parameters as
required in keypad menu. Main Menu\ Commission
Unit\RF/EF Setup\ ExhOn OA Pos=%, ExhMax
OAPos =%
e. For details on commissioning RFEF Ctrl = CAV,
Flow, Sped/Net, or Flow Di󰀨, refer to OM-1288
8. Set the Outside air damper and economizer control
parameters as required in keypad menu Main Menu\
Commission Unit\OA Damper Set-Up
a. Set the Vent Limit = % open required at 100% SAF
full ventilation
b. Set the loFlo Vent Limit OAD % at minimum SAF
speed, full ventilation
c. If the unit is performance DCV (Demand Control
Ventilation), Set the DCV limit for the minimum
OAD position during DCV at 100% SAF Flow. Set
CO2 Reset = PPM@DCVLmt = lower threshold
of CO2 ppm allowed and PPM@VentLmt = Upper
threshold of CO2 ppm allowed.
9. Set the control timers as required in keypad menu Main
Menu\Commission Unit\Timer Settings.
a. Set the date and time in keypad menu Setup/
Service\Time/Date\.