Donaldson Torit DFO 2-4, Installation And Operation Manual

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Downflo Oval, DFO 2-4 and 3-6
24
Magnehelic Gauge Installation
1/8-in NPT x 90°
male elbow
clean-air plenum pressure
tap location
1/8-in NPT adapter
1/8-in NPT adapter
plenum tap location
3/8-in flat washer
1/8-in NPT coupling
mounting bracket
#6-32 x 1/4-in mounting screws
support structure
mounting surface
Magnehelic gauge
high-pressure port
low-pressure port
two, 1/8-in NPT
adapters
plastic tubing
two, 1/8-in NPT pipe plugs
two, self-drilling screws
1/8-in NPT x 90° male elbow
dirty-air plenum pressure tap location
3/8-in flat washer
1/8-in NPT adapter
1/8-in NPT x 90° elbow
static pressure tee
Magnehelic
®
Gauge
The Magnehelic is a differential pressure gauge used to
measure the pressure difference between the clean- and
dirty-air chambers and provides a visual display of filter
change requirements. The high-pressure tap is located in
the dirty-air plenum and the low-pressure tap is located
in the clean-air plenum.
1. Choose a convenient, accessible location on or near
the unit for mounting that provides the best visual
advantage.
2. Plug the pressure ports on the back of the gauge
using two 1/8-in NPT pipe plugs supplied. Install two
1/8-in NPT male adapters supplied with the gauge
into the high- and low-pressure ports on the side of
the gauge. Attach the mounting bracket using three
#6-32 x 1/4-in screws supplied.
3. Mount the gauge and bracket assembly to the
supporting structure using two self-drilling screws.
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. Carefully remove the cloth protecting the filters.
Close access doors and tighten securely by hand.
6. Zero and maintain the gauge as directed in the
manufacturer’s Operating and Maintenance
Instructions provided.