Specifications

Munters Corporation
DFT
SAE
DATE
12/12/07
DWG NO.
K70203
Dehumidification Division
CHK
CAG
12/12/07
CUST NAME:
HCD1125 thru 9000-SA / ICA-0500
thru 1500 (STANDARD)
79 Monroe Street
Amesbury, MA 01913
APP
CAG 12/12/07
PAGE
4 OF
8
REV
2
4.2.4.2 If limit switch (LS01) is not opened once every 600 seconds, a timer in (PLC1) times out the system is
faulted.
4.2.4.3 The system will go into the shutdown sequence (described in Section 4.0), and the system auxiliary
dry contacts close in sequence (described in Section 2.0).
4.2.4.4 The dehumidifier will be held in the 'Fault' condition by (PLC1). To restart the dehumidifier clear the
alarm pressing the acknowledge ACK on the HMI, reset the overload, and go to the ALARM screen
and press the F4 RESET key this resets the PLC. To restart the system, the selector switch (SS01)
must be moved to the “OFF” position, then move (SS01) back to the “AUTO” or “MANUAL” position.
5.0 List of System and DH Warnings
5.1 WARNING – REACTIVATION LOW TEMP
5.1.1 LOW TEMP (Reactivation Low Temperature Fault Set point). The adjustment range is 90.0 to 110.0. The
parameter corresponds to the value of the set point in engineering units (Typical Set point = 110° F).
6.0 PROPORTIONAL CONTROL LOOPS/ DH INTERLOCKS
6.1 Reactivation Heat Energy Control
6.1.1 The Reactivation Heater “Energy Modulation Damper (DA01)” accepts a 0-10V modulating signal from the logic
controller to control Reactivation Outlet air temperature, as sensed by the reactivation air outlet temperature
transmitter (TC02), at its predetermined set point (Set point = 120°F).
6.2 Dehumidification Humidistat Interlock
6.2.1 The Humidistat is an ON/OFF Controller (HS01), and is furnished to interlock the Dehumidifier heel and
associated controls, based on moisture removal demand.
6.2.2 Provided that the System is running, as the humidity level, as sensed by (HS01), exceeds the desired set point,
HS01 will close contacts energizing relay (CR69) which, in turn, signals the PLC (PLC1) to start the
Dehumidifier.
6.2.3 The PLC (PLC1) will enable the Desiccant Wheel Drive Motor Starter/ Relay (CR01), Reactivation Fan Motor
Starter (MS02), and the associated Reactivation Energy modulation controls.
6.2.4 When the humidity level, as sensed by (HS01) decreases below the desired set point, the Dehumidifier will initial
a 90 second purge/ shutdown sequence. Upon completion of the purge sequence, the PLC (PLC1) will de-
energize the Desiccant Wheel Motor Starter/ Relay (CR01), Reactivation Fan Motor Starter (MS02) and
associated Reactivation Energy Modulation controls. The Operator Interface (OIT1) will display Dehumidifier:
STANDBY (if system is still running) or “READY” (if the system is stopped).
7.0 HUMAN MACHINE INTERFACE CONTROL (OP73 SIMATIC PANEL)
7.1 Screen descriptions, navigation and security:
* Indicates a level of security to adjust equipment parameters.
Note: Other visual options are password protected for FACTORY USE ONLY.
7.1.1 System Screen This screen is the first screen that comes up when power is applied to the equipment (figure
1.0). The System screen displays the equipments operational status along with separate indication for the