Donaldson Torit DFO 2-4, Инструкция по установке и эксплуатации

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Donaldson Company, Inc.
Photohelic
®
Gauge
Electrical work must be
performed by a qualified
electrician and comply with all applicable
national and local codes.
Turn power off and lock out electrical
power sources before performing service or
maintenance work.
Do not install in classified hazardous
atmospheres without an enclosure rated for
the application.
The Photohelic combines the functions of a differential
pressure gauge and a pressure-based switch. The gauge
function measures the pressure difference between the
clean- and dirty-air plenum and provides a visual display
of filter condition. The high-pressure tap is located in the
dirty-air plenum and a low-pressure tap is located in the
clean-air plenum. The pressure-based switch function
provides high-pressure ON and low-pressure OFF control
of the filter cleaning system.
1. Choose a convenient, accessible location on or near
the unit for mounting that provides the best visual
advantage.
2. Mount the gauge to the remote panel or door using
the mounting ring, retaining ring, and four
#6-32 x 1 1/4-in screws. Do not tighten screws.
Connect two 1/8-in NPT x 1/4-in OD male adapters to
the gauge’s high- and low-pressure ports. Align the
adapters to the
2.375-in hole in the right-hand side of the mounting
bracket. Tighten screws.
3. On the back of the gauge, remove four #6-32
x 5/16-in screws and plastic enclosure. Set aside.
Add two jumper wires supplied by customer. Remove
the jumper from the pressure switch located on the
timer board, if equipped. Using the 3/4-in conduit
opening, wire the gauge as shown. Reassemble and
fasten the enclosure securely.
4. Thirty-five feet of plastic tubing is supplied and must
be cut in two sections. Connect one section of tubing
from the gauge’s high-pressure port to the pressure
fitting located in the dirty-air plenum. Connect
remaining tubing from the gauge’s low-pressure
port to the fitting in the clean-air plenum. Additional
tubing can be ordered from your representative.
5. Zero and maintain the gauge as directed in the
manufacturer’s Operating and Maintenance
Instructions provided.
6. To install the Photohelic gauge mounted in a NEMA
4, Weatherproof Enclosure, follow Steps 4 and 5.
Photohelic gauge
solenoid
valves
Pressure Switch
terminals
neutral
110-V
jumper wires
supplied by customer
timer
board
L1 L2 1 2 3
sol
com
L2
L1
HI LO
C NO NC NC NO C
C NO NC NC NO C
Photohelic Gauge Wiring Diagram
Photohelic Gauge in Optional NEMA 4 Weatherproof
Enclosure
Note:
For use with solid-state timer only. All parts, except
the mounting bracket shown in the Photohelic Gauge
Standard Installation drawing are included with the
NEMA 4, Weatherproof Enclosure.