Donaldson Torit TBV-2, Инструкция по установке и эксплуатации

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Bin Vent, Models TBV-2, TBV-4, and TBV-6
21
Optional Equipment
Photohelic Gauge
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.
The pressure taps for this gauge are factory installed.
For units being installed in remote locations, such
as on top of silos or storage bins, it is recommended
to mount the gauge at ground level adjacent to the
control box and motor start switch.
Electrical installation 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.
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 jumper from 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.
Photohelic gauge
solenoid
valves
Delta P
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
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.
Photohelic Gauge in Optional NEMA 4
Weatherproof Enclosure