A.J. Antunes & Co RLGP-A 803112704 - Manual (Page 3)

A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
Model A Installation Information
1-630-784-1000 Fax: 630-784-1651 Page 3 of 4 P/N 1011087 06/10
1-800-253-2991
Mounting
All gas pressure switches must be mounted in a
horizontal position with the inlet stem down. Switches
should be reasonably level but do not require accurate
leveling.
Single gas switch models have a 1/4” NPT gas inlet.
Double combination Hi-Lo switches have a 3/8” NPT for
high pressure inlet and a 1/8” NPT for low pressure inlet.
Gas vent outlets are 1/8” NPT on all models.
Piping can be either standard black pipe or aluminum
tubing.
All switches can be supported by the inlet pipe, but
optional mounting brackets are available if needed.
All switches have been factory-calibrated and tested
for leaks. However, it is recommended that after the
installation is completed, switch, gas pipe inlets, and
connections be tested for leaks with a soap bubble test.
7/8”
(22 mm)
2 5/8”
(67 mm)
1/2”
(13 mm)
7/8”
(22 mm)
1 1/8”
(28 mm)
Large
Mounting
Holes:
5/16”
(8 mm) dia.
Small
Mounting
Holes:
7/32”
(6 mm) dia.
All Mounting
Holes:
5/16”
(8 mm) dia.
1/2”
(13 mm)
7/8”
(22 mm)
1”
(25 mm) 1”
(25 mm)
3 3/4”
(95 mm)
1/2”
(13 mm)
2”
(51 mm)
Single Models
Double Models
Operation
Low Gas Pressure: Low gas pressure switches break
the electrical circuit on pressure drop at the point when
gas pressure becomes lower than the indicated set
pressure.
Before the manual reset latch can be properly latched,
gas pressure in the chamber must be higher than the
indicated setting. The position of the reset latch on the top
cover of the switch shows whether reset latch is in the on
or off position. Reset latch must be in “on” position after
latching to be properly set.
High Gas Pressure: High gas pressure switches break
the electrical circuit when pressure rises above the
indicated preset pressure. The reset latch should be
latched in the “on” position if the gas pressure in the
switch chamber is below the indicated high setting.
Recycle Models: High and Low Gas Pressure
Recycle models operate automatically and do not need to
be reset. Otherwise they are constructed, adjusted, and
operate in the same manner as the reset models.
Combination Models: The combination unit contains
one high pressure unit and one low pressure unit, in the
ranges you select. They may be either reset or recycle
type. Each unit has an on/off indicator and its own range
scale indicator.