Watts LYNC UV-H, Инструкция по установке, эксплуатации и обслуживанию

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LYNC UV-H
SECTION 4: INSTALLATION INSTRUCTIONS
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4.4 Parallel Installation
When more than one unit is installed in parallel (flow split between units), the units must be installed
with manual shutoff valves both upstream and downstream of each unit to allow one unit to be serviced
without interrupting the flow to the others. 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.
4.5 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, 20 gauge wire is
recommended and if the 4-20mA option is used, 20 gauge wire with foil and drain wire. Install wires
onto spring cage terminals provided.
4.6 External Contacts
All UV-H systems provide two
“dry” contacts for remote alarms or auto-dialers – 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.
4.7 Remote Start/Stop
All UV-H 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.
4.8 4-20mA & Modbus Option
A 4-20mA option is available with two continuous analog output signals and one input signal. The output
signals can be UV Dose, or UV Intensity, or UV Transmittance. The input signal is flow (on 1000 models
only). Modbus capability will also be available when the 4-20mA option is purchased.