Aircel ABP Series, Руководство по установке и эксплуатации

Страница: 24 / 52

ABP Series | Blower Purge Desiccant Air Dryer
24
AIRCEL PROGRAMMABLE CONTROLLER (APC)
Dryer Operations, Cont.
ENERGY SAVINGS: Waiting on Half Cycle to Complete
The Energy Savings Mode screen is shown during the time the
system is in an active energy saving mode, which is defined as:
• Waiting on the half cycle time of 240 complete, if the heating
or cooling cycles had terminated earlier than the fixed time
cycles during regeneration
• Waiting on the outlet dew point to reach the set level (-50°F or
higher) with a maximum time limit of 720 minutes of drying
time on one vessel while in the energy management mode
When one of the above conditions is met, the system will
advance to the next step.
The screen will not be visible when the unit is in Service Mode
or Heatless Mode. If Service or Heatless Mode is activated
during this step, the unit will advance to the next step (Heatless
Mode) or the “Press to Proceed” button will appear (Service
Mode).
WARNING: If the screen is unlocked, the screen will not
advance nor will the “Press to Proceed” button appear when the
step is complete.
PARALLEL FLOW: Vessel 2
Parallel flow mode operation is the last step prior to a Vessel
switchover to begin drying. It allows the recently regenerated
vessel to further cool down with some of the inlet gas flow
since it will be diverted to both vessels (the inlet valves will be
open during this process), which helps reduce dew point and
temperature spikes after switchover. The parallel flow period is
10 minutes.
In this step, Vessel 1 is still the main drying vessel (Vessel 1 Inlet
valve K1 should be open), the control system PLC will energize
solenoid SOL 2 to open, Vessel 2 inlet valve K2 and de-energize
solenoid SOL 7 to close, re-pressurization valve V3 to allow
parallel flow for 10 minutes.
All regeneration and depressurization valves are closed during
this step and the heater and blower should not be active.
At the end of the 10 minute parallel flow, the system will
advance to Step 7.
If in service mode, the “Proceed to Next Step” will be displayed
on the screen once the Step is complete. If everything has been
verified in the step, press the “Proceed” button to proceed to
next step. This will allow an authorized service technician to
view operation of the system in a shorter time period.
WARNING: If the screen is unlocked, the screen will not
advance nor will the “Press to Proceed” button appear when the
step is complete.