SPX Hankinson HHE Series Instruction Manual page 23

tower that is actively purging when the power on/off button is
actuated will be subjected to a rapid repressurization that can
lead to fluidization and subsequent abrasion of the desiccant bed.
Ideally, dryers should only be powered off during those portions of
the drying cycle when both desiccant towers are at full operating
pressure. Use of the remote start/stop connections as described
in Section 7.2.3 would be preferable in most cases.
• Terminals J2-7 and -8 (remote alarm reset and manual cycle
increment switch)
7.2.5 Connections – RS232
Refer to Figure 7-4, Panel Layouts – Level 1 Controller. RS232
connections can be made at the 3-pin connector labeled J5 and
located at the upper left-hand corner of the control board. A cable for
this connection can be purchased through your distributor.
7.3 Control Board Jumpers – Level 1
Refer to Figure 7-3, Point to Point Connection Diagram – Level 1
Controller. In the upper left hand corner of the control board there
are four two-pin jumpers labeled J1 through J4. The jumper is a
removable bridge that is used to make or break continuity between
the two pins that form a pair. When installed in the ON position, the
jumper is placed on both pins of the pair and continuity between the
pins is established. When installed in the OFF position, the jumper is
removed or stored on a single pin and continuity is broken. Jumper
functions are as follows:
7.3.1 Jumper J1 – Maximum Operating Pressure
Jumper J1 is used to select the maximum operating pressure. Installed
in the OFF position when operating at inlet pressures of 60 to 150 psig
(4.1 to 10.3 barg). Installed in the ON position when operating at
inlet pressures of 120 to 250 psig (8.3 to 17.2 barg). This setting
will affect tower purge and repressurization times. (Refer to serial
number tag.)
7.3.2 Jumper J2 – Common Alarm.
Jumper J2 is installed in the OFF position to enable both dryer fault
alarms and service alarms to activate the common alarm. This is the
default configuration. Install jumper J2 in the ON position if the common
alarm is to be activated by a dryer fault alarm only.
7.3.3 Jumper J3 – Service Reminder Interval
Jumper J3 is used to select the service reminder interval. Installed in
the OFF position when the Normal service reminder interval is desired.
Installed in the ON position when the Severe service reminder interval
is desired. Service items, check points and time intervals appear in
Table 7-2.
7.3.3.1 Filter Service
When the service interval for filters has expired the following LEDs
will blink:
• Service LED (amber)
• Three filter LEDs (amber)
7.3.3.2 Desiccant Service
When the service interval for desiccant has expired, the following
LEDs will blink:
• Service LED (amber)
• Both tower regenerating LEDs (amber). The service function
overrides the normal display of the tower regenerating LEDs.
7.3.3.3 Valve Service
When the service interval for valves has expired, the following LEDs
will blink:
• Service LED (amber)
• Valve LEDs (green) The service function overrides the normal
display of the valve LEDs.
To extinguish the blinking LEDs and restart the timer for a new service
interval, press the alarm reset button.
NOTE: Time continues to accumulate as long as power is supplied to
the controller, whether the controller is switched on or off.
Use the following sequence to manually reset the accumulated service
interval time for all timers.
• Pause for about 1 second at each instruction. If the sequence is
executed too quickly it will not work.
• With the controller already on, press and hold the alarm reset
button.
• Press and hold the on/off button.
• Release the on/off button.
• Release the alarm reset button. The service interval time is now
reset; the maintenance LED flashes three times to acknowledge
the action.
Service Item
(Customer check points
are listed for each item)
Filters
1. Check prefilter Delta-P
2. Ensure prefilter drain is discharging
3. Check afterfilter Delta-P
Desiccant
1. Check moisture indicator
2. Check dryer outlet dew point
3. Inspect mufflers for excessive dusting
Valves
1. Ensure valves are cycling properly
2. Check for switching failure alarms
3. Inspect valves for leaks - adjust purge
valve as needed
Jumper J3 – Service Reminder Intervals
7.3.4 Jumper J4 – Power Recovery Mode
Jumper J4 is used to select the power recovery mode. When power
to the controller is interrupted, the position of this jumper controls the
recovery mode of the dryer when power is restored. Installed in the
OFF position when automatic power recovery is not desired. Installed
in the ON position when automatic power recovery is desired.
• Jumper J4 installed in the OFF position – Automatic power
recovery is turned off. The controller returns to the off state when
interrupted power to the controller is restored.
• Jumper J4 installed in the ON position – Automatic power recovery
is turned on. The controller remembers its state (on or off) prior to
a power interruption and returns to that state (at the beginning of
the prior ISO operating cycle) when power is restored. If power
is interrupted while the controller is in the Manual cycle mode,
the controller will return to the prior ISO operating cycle and not
the Manual cycle when power is restored.
— 21 —
Normal Severe
Service Service
Interval Interval
(J3 OFF) (J3 ON)
4,000
Hours
8,000
Hours
4,000
Hours
Table 7-2
2,000
Hours
4,000
Hours
2,000
Hours