Controllers - General - SPX Hankinson HHE Series Instruction Manual

5. CONTROLLERS – GENERAL
5.1 Overview
The solid-state dryer controller is located in a polycarbonate, NEMA
Class 4/4X, IP66 rated electrical enclosure mounted to a center panel
located between the two desiccant towers. Controls are available in
three functional levels. The Timer Controller offers a fixed-time cycle
that provides a dew point corresponding to ISO compressed air quality
class 2. Both the Level 1 and Level 2 controls offer four fixed-time
cycles that provide dew points corresponding to ISO compressed air
quality classes 1 through 4. A key difference between the Level 1 and
Level 2 controls is the way in which they address energy savings. When
inlet flow is less than the adjusted rated capacity of the dryer, average
Category
AC Input Voltage: 100-240 VAC, 50-60 Hz (See NOTE 1)
AC Input Voltage: 85-264 VAC, 47-63 Hz (See NOTE 1)
DC Input Voltage: 11.5-28 VDC (See NOTE 1)
Auxiliary power terminals (See NOTE 2)
Solenoid valve coil voltage
NEMA 4/4X, IP 66 electrical enclosure rating
Soft on/off switch with two power recovery modes (See NOTE 3)
Tower status LEDs (amber=drying)
General
Tower status LEDs (green=drying, amber=regenerating)
Process valve status LEDs (on=valve open, off=valve closed)
Operating mode LEDs (see next category for number of modes)
Alarm LED (red)
Voltage-free alarm contacts, 5A rating
Alarm reset switch (mounted on front panel)
Service reminder LEDs (See NOTE 4)
Vacuum fluorescent text display
60-150 or 120-250 psig MOP (selectable via jumper on circuit board)
ISO Class 1 (-100°F/-73°C PDP) - fixed cycle (4 minute)
ISO Class 2 (-40°F/-40°C PDP) - fixed cycle (10 minute)
ISO Class 3 (-4°F/-20°C PDP) - fixed cycle (16 minute)
Operating Modes
ISO Class 4 (+38°F/+3°C PDP) - fixed cycle (24 minute)
(See NOTE 5 and
Fixed Cycle Energy (purge) Saver (See NOTE 6)
NOTE 7)
Manual Cycle (test mode)
ISO Class 2 (-40°F/-40°C PDP) - demand cycle
ISO Class 3 (-4°F/-20°C PDP) - demand cycle
ISO Class 4 (+38°F/+3°C PDP) - demand cycle
Controlled shutdown and restart (upon user supplied contact closure)
Tower pressure switches (2)
High Humidity Alarm
Digital I/O
Filter monitor alarm (1 or 2 filters)
Electric drain alarm (1 or 2 filters)
Electric drain test (1 or 2 filters)
Analog I/O
Thermistors (4)
(12 bit accuracy)
Communication RS232 communication port
Desiccant Dryer Controllers
Feature
Feature Comparison
(continued on next page)
purge air requirements are reduced. This reduction can translate to
energy savings at the air compressor.
The Level 1 Controller offers 8 selectable fixed-cycle Energy (purge)
Saver modes (0% to 70% in 10 % increments) to reduce purge time
to match the load on the dryer.
Level 2 Controllers feature the Automatic Purge Saving System
(APSS) as described in Sections 3.2 and 3.4. When Level 2 Controllers
are operated in demand rather than fixed cycle modes, the APSS
automatically adjusts to dryer loading and extends drying time when
possible. Average purge use is thus automatically reduced.
A feature-by-feature comparison of each controller can be found in
Table 5-1.
Controller
12 VDC
Table 5-1
— 15 —
Level 2
Timer
Level 1
Fixed Cycle
Fixed Cycle Only
and APSS
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12 VDC 12 VDC
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Optional
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Optional
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