UV Pure Technologies Crossfire Technology Hallett 1000NC, Инструкция по эксплуатации

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Hallett Instruction Manual
Released on 8-Aug-19
– GH2B
Page 18 UV Pure Technologies Inc. © 2019
downstream of each unit. This allows one unit to be serviced without
interrupting the flow to the other units. Another requirement is the installation
of a check valve downstream of the UV unit (after the UV unit). This will
prevent the backflow of water to a unit.
Installation is now complete.
Control Interfaces
WARNING : Shutdown and unplug the unit before installing any external
wiring.
External wiring can be introduced through a port in the left side of the unit
–
see Figure 4.4. By default, a plug is installed into this port in a standard unit
and a strain relief (Kit # GD21) can be purchased if connection to remote
devices is required. For External Contacts and Remote Start/Stop, 22 gauge
wire is recommended and if the 4-20mA option is used, 22 gauge wire with
foil and drain wire. Install wires onto spring cage terminals provided.
External Contacts
All Hallett systems provide two
“dry” contacts for remote alarms or autodialers
– the word “dry” indicates no voltage present at the contact. The first contact
labeled RUN is
a “System Run” condition – when closed, the unit is treating; if
the contact is open, the unit is in alarm, has lost power, or perhaps the wire
has been cut. The second contact labeled WARNING is to indicate the
existence of an abnormal condition such as high water temperature. When
this contact is open, the system is normal; when this contact is closed, a
warning condition exists. Both contacts are meant for control purposes only,
not to drive devices. The maximum rating of the contact is 24 Vac or Vdc, 2A.
Remote Start/Stop
All Hallett systems have remote start/stop capability which allows them to
remain idle without operating the UV lamps. When a signal is given (voltage
applied), UV lamps are energized. This is convenient for locations requiring
periodic disinfection such as pump houses. The voltage rating range of the
contact is 5-24 Vdc or Vac, 0.5W max. The remote start/stop is disabled by
default and can be enabled in the Advanced Settings menu.
Caution : Avoid continuously starting and stopping the unit within a 24 hr
period, as this will accelerate the aging of the UV lamps and will not be
covered under warranty. See Product Specification Tables for permissible
lamp cycles.
4-20mA & Modbus Option
A 4-20mA option is available on certain models. This device will provide a
continuous analog output signal for UV Intensity and UV Transmittance.
Modbus capability will also be available when the 4-20mA option is
purchased. For more details, refer to the 4-20mA Instruction Sheets which
are supplemental to this manual.