Daikin PreciseLine Series Installation And Maintenance Manual page 54

Cooling/Heating Start up
NOTICE
Operational Override using the Manual Ctrl Type commands should only be
used by trained service technicians as several timing functions are reduced
to speed system check out. The Manual Ctrl Type commands should only be
used for a short period of time for testing of the unit's operation by a trained
service technician. The Manual Ctrl Type should be returned to Normal to
allow for normal unit operation. If Manual Ctrl Type is left as something
other than Normal after system check out, the unit may be damaged. If no
modifications have been made to the controller for 30 minutes, the Manual
Ctrl Type will revert to Normal When in Operational Override, the modified
time values listed in Table 27 will be used
Table 27: Operational Override Time Values
Control Parameter
Duct Static Pressure Control Delay
Compressor Minimum On Time
Compressor Minimum Off Time
Condensate Overflow Alarm Delay
Cooling Interstage Time
Heating Interstage Time
Economizer/OA Damper and Cooling Start-up
1. Verify all duct and unit mounted isolation dampers are
open.
2. Place the unit in the Off mode in order to initiate the
Manual Control Mode through the keypad menu: Main
Menu\Manual Control\Ctrl Mode = Off
3. Place the unit into Override Cooling Mode through the
keypad menu: Main Menu\Manual Control\Manual Ctrl
Type = Cooling
a. The fan will activate
b. If present, the economizer/OA damper will open
c. If present, the chilled water valves will open
d. If present all compressor outputs will stage on
Alternativly, individual outputs can be commanded to on
using the Output Override functionality. See MicroTech 4 Lite
Operations Manual for more information.
Heating Startup
1. Verify all duct and unit mounted isolation dampers are
open.
2. Place the unit in the Off mode in order to initiate the
Manual Control Mode through the keypad menu: Main
Menu\Manual Control\Ctrl Mode = Off
3. Place the unit into Override Cooling Mode through the
keypad menu: Main Menu\Manual Control\Manual Ctrl
Type = Heating
a. The fan will activate
b. If present, the hot water valves will open
c. If present electric heat outputs will stage on
IM 1267-7 • PRECISELINE AIR HANDLER
Modified Time
5 Seconds
6 Seconds
6 Seconds
2 Seconds
6 Seconds
6 Seconds
MicroTech 4 Lite Unit Operation
Alternativly individual outputs can be commanded on using
the Output Override functionality. See the MicroTech 4 Lite
Operations Manual for more information.
Setup for Normal Operation
When all start-up procedures are completed, set the controls
and program the MicroTech 4 Lite 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\Unit Set-Up\Ctrl
Temp Scr = Space, Return, Average based on
application needs.
Main Menu\Commission Unit\Cooling Set-Up\Occ
b.
Clg Spt DAT Clg Spt
&
Main Menu\Commissioning Unit\Heating Set-Up\Occ
c.
Htg Spt DAT Htg Spt.
&
2. Set the low ambient compressor lockout setpoint as
Main Menu\Commission Unit\Cooling
required in menu,
Set-up\Clg Lo Oat Lk =
unless the unit is equipped for low ambient operation.
3. Set the compressor lead/lag function as desired using
Main Menu\Advanced Menus\Cooling Set-
keypad menu
up\Lead Compressor
4. Set the duct static pressure control parameters as
required in keypad menu
SAF DSP Spt =___ in.
configuration.
5. Set the EF Control Parameters based on the application
a. If EF Control = Tracking, then set the fan tracking
parameters as required in keypad menu.
Menu\ Commission Unit\EF Set-up\Min EF Cap, Max
EF Cap
Main Menu\ Commission Unit\EF Set-up\EF Ctrl
b. If
= Constant
, Set the constant exhaust fan speed
as required in keypad menu location
Advanced Menus\EF Set-Up\EF Const Speed Setpt=
%
based application and unit configuration.
8. Set the Outside air damper and economizer control
parameters as required in keypad menu
Commission Unit\Econo Set-Up
a. Set the OAD Min and OAD Max positions
b. Set the OAD Out Scaling based on application and
unit configuration
c. Set the Econo Strategy based on application and
unit configuration
d. Set the Econo OAT Setpt, Temp Diff Setpt, Out
Enth Setpt, or Enth Diff Setpt based on application
and unit configuration
e. If the unit is performance DCV (Demand Control
Ventilation), go to: Main Menu\Commission Unit\
C02 Set-Up. set the Min OA CO2 Spt = lower
54
.
. Do not set it below 50°F (10°C)
Main Menu\Quick Menu\
based on application and unit
Main
Main Menu\
Main Menu\
www.DaikinApplied.com