Norgren R24S Series - Manual (Page 2)

R24
Installation & Maintenance
Instructions
1-3. How to Set Outlet Pressure Limit
when the Pressure Set Button is in the
Tamper Resistant Position (Fig 1).
To Set a Maximum Pressure Limit:
1. With primary pressure applied to the R24, turn
adjusting knob clockwise until the desired maximum
outlet pressure is reached.
2. Hold adjusting knob, then use a 5/64" hex wrench
to loosen button screw 4 to 5 turns.
3. Depress and hold button screw, then turn adjusting
knob clockwise until it stops. Release button
screw.
4. Hold adjustment knob and tighten button screw. Do
not depress screw, as the adjustment limit will
be affected.
5. Turn adjusting knob fully counterclockwise.
To Set a Minimum Pressure Limit:
1. With primary pressure applied to the R24, turn
adjusting knob clockwise until the desired minimum
outlet pressure is reached.
2. Hold adjusting knob, then use a 5/64" hex wrench
to loosen button screw 4 to 5 turns.
3. Depress and hold button screw, then turn the
adjusting knob counterclockwise until it stops.
Release button screw.
4. Hold adjustment knob and tighten screw. Do not
depress screw, as the adjustment limit will be
affected.
WARNING
When the minimum adjustment limit is set
above zero, the upper limit of adjustment
increases correspondingly, and could possibly
approach inlet pressure.
1-2. Regulators Shipped from Factory:
● allow pressure adjustment throughout the entire
outlet pressure range as shown on the regulator
label and as listed in the model number description
at the top of page 1.
● have the red pressure set button (Figure 1) in the
tamper resistant position, preventing the accidental
setting of a pressure limit. When the button is in
the tamper resistant position, the letters TR are
visible on the button; when the button is in the
adjustable position, the letter A is visible.
1-2. Set the R24 for Normal Operation
(Fig 1).
Any time the R24 is disassembled and reassembled,
the adjusting knob must be reset for normal operation
(i.e., set to operate thru the entire outlet pressure
range as listed in the model number description at the
top of page 1).
1. Make sure the red pressure set button is in the
adjustable position (end marked A up). If the end
marked TR is up, reverse the position of the button
by performing steps 1 and 2 in paragraph 1-5,
Tamper Resistant Procedure, but reinstall the button
with the end marked A up.
2. Install the regulator in a compressed air test line
with gages installed for observing inlet and outlet
pressures. Inlet pressure should not exceed 250
psig (17.2 bar).
3.Turn adjusting knob fully counterclockwise (ccw),
then slowly apply inlet pressure while observing the
outlet pressure gage.
If outlet pressure is indicated with the knob fully
ccw:
a. Depress and hold the pressure set button, then
turn adjusting knob clockwise (cw) until it stops
and release button.
b. Turn adjusting knob ccw until outlet pressure
reaches zero. If outlet pressure does not reach
zero when knob is turned fully ccw, repeat steps (a)
and (b) until it does.
c. When outlet pressure reaches zero, turn knob
an additional 1/4 turn ccw. Depress pressure set
button, then turn knob fully ccw and release
button.
d. Turn knob slowly cw and verify that outlet pressure
starts after knob is turned 1/4 turn. Fine
adjustment can be made by depressing the
pressure set button and turning knob cw or ccw
as needed.
If outlet pressure is not indicated with the knob
fully ccw:
a. Turn adjusting knob clockwise (cw) until outlet
pressure is indicated.
b. If outlet pressure is not indicated when the knob is
turned fully cw, depress pressure set button, then
turn adjusting knob ccw until it stops and release
button. Repeat steps (a) and (b) until outlet
pressure is indicated when the knob is turned cw.
c. When outlet pressure starts, turn knob ccw 1/4
turn. Depress pressure set button, then turn knob
fully ccw and release button.
d. Turn knob slowly cw and verify that outlet pressure
starts after knob is turned 1/4 turn. Fine
adjustment can be made by depressing the
pressure set button and turning knob cw or ccw as
needed.
After the regulator is set for normal operation, the
adjusting knob may be set to limit the maximum or the
minimum adjustable pressure setting of the regulator.
For example, a regulator with a 10 to 125 psig outlet
pressure range could be set to limit the maximum
outlet pressure to 90 psig, or it could be set to limit the
minimum outlet pressure to 25 psig.
a subsidiary of IMI plc
IM-414.210.02 (2/02)
Setting Outlet Pressure Adjustment Limits
On The R24
© Norgren 2002
1-4. How to Set Outlet Pressure Limit
when the Pressure Set Button is in the
Adjustable Position (Fig 1).
To Set a Maximum Pressure Limit:
1. With primary pressure applied to the R24, turn
adjusting knob clockwise until the desired
maximum outlet pressure is reached.
2. Depress and hold button screw, then turn the
adjusting knob clockwise until it stops. Release
button screw.
3. Turn adjusting knob fully counterclockwise.
To Set a Minimum Pressure Limit:
1. With primary pressure applied to the R24, turn
adjusting knob clockwise until the desired
minimum outlet pressure is reached.
2. Depress and hold button screw, then turn the
adjusting knob counterclockwise until it stops.
Release button screw.
WARNING
When the minimum adjustment limit is set
above zero, the upper limit of adjustment
increases correspondingly, and could possibly
approach inlet pressure.
1-5. Tamper Resistant Procedure (Fig 1).
Adjustment limits can be made tamper resistant by
reversing the position of the red pressure set button
so the end marked TR is up. To reverse the button:
1. Apply minimum 25 psig (1.7 bar) to the regulator.
Turn adjusting knob fully clockwise, then hold
adjusting knob and and remove button screw
using a 5/64" hex wrench. Do not depress
screw, as the adjustment limit will be affected.
Remove button, then reinstall with the end
marked TR up.
2. Install button screw, taking care not to push screw
in when tightening. Turn adjusting knob fully
counterclockwise.
1-6. Warning.
These products are intended for use in industrial
compressed air systems only. Do not use these
products where pressures and temperatures can
exceed those listed under Technical Data.
If outlet pressure in excess of the regulator
pressure setting could cause downstream equipment
to rupture or malfunction, install a pressure relief
device downstream of the regulator. The relief
pressure and flow capacity of the relief device must
satisfy system requirements.
The accuracy of the indication of pressure gauges
can change, both during shipment (despite care in
packaging) and during the service life. If a pressure
gauge is to be used with these products and if
inaccurate indications may be hazardous to
personnel or property, the gauge should be
calibrated before initial installation and at regular
intervals during use.
Before using these products with fluids other than
air, for non industrial applications, or for life-support
systems consult Norgren.
Figure 1. R24 Pressure Set Button
BUTTON
SCREW
ADJUSTING
KNOB
RED PRESSURE SET BUTTON
TR = Tamper Resistant Position
A = Adjustable Position