Thermal Solutions APEX APX425C Installation, Operating And Service Instructions page 86

10
Operation
(continued)
I. Manual Operation and Tuning
Select Main Menu >> Operation to access the
Operation screen shown in Figure 10-16. From the
Operation screen, the user may manually adjust
firing rate or exercise pumps, access a service
trend, or tune the boiler.
NOTICE: When finished using manual mode, be
sure to select Automatic to return boiler to normal
operation. Otherwise the control will remain in
Manual mode for one hour, or until power is
cycled.
Figure 10-16: Operations Screen
1. Bar Graph & Trend – Shows active sensor,
active setpoint, and modulation.
2. Automatic/Manual Firing Rate Control – User
may adjust modulation manually. Menu also
allows for switching of units from % (default) to
RPM.
3. High/Low – Allows user to drive boiler to high
or low fire when Manual Modulation is selected.
4. Service Trend – Shows boiler temperatures,
firing rate, and demand statuses.
5. Tune – Allows for adjustment of parameters
related to the rate of boiler response. This
includes PID settings, ramp rates and more.
Refer to Paragraph J, 14 for more details.
6. Manual Pump Exercise – Allows pumps to be
set to either ON or Automatic. When ON is
selected, pump will run. When Automatic is
selected, pump will follow settings assigned in
Pumps menu.
86
APEX Installation, Operating, & Service Instructions
J. Parameter Adjustment
1. Entering Adjust Mode
NOTICE: Parameter adjustment may be
performed only by a qualified service technician.
Control operation may be tailored to suit the
application by adjusting parameters. To adjust
parameters, select the ADJUST icon located
throughout the display.
Press ADJUST icon to review and
adjust all parameters.
Parameters are password protected to
discourage unauthorized or accidental
changes to settings. User login is required to
adjust these settings. Parameters are locked
and login requirement is shown when the
padlock icon is not green.
• Press the Lock icon to access password
screen.
• Use keypad to enter password.
• Press Enter Key when complete.
Figure 10-17: Entering Adjust Mode
NOTICE: A USB thumb drive may be used to
transfer parameters from one boiler to another.
See Paragraph K, "USB Thumb Drive Parameter
Transfer".
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