Antunes HGP-H Installation Manual
A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
Model H Installation Information
IMPORTANT
Please read these instructions carefully to assure
correct installation. This equipment must be
installed only by a licensed electrician who is
experienced with combustion safeguard control
systems and understands the functions of interlocking switches, such as gas pressure switches.
Prior to being put into operation in conjunction
with the combustion safeguard systems, all
switches should be tested for proper range setting
and proper wiring. Check piping connections and
switch house for leaks with a soap bubble test. All
exhaust fans and blowers should be inspected and
checked for proper rotation prior to starting up.
Model D Switches
You are installing one of the finest switches of its type on
the market. The Model H is adjustable within its range as
shown on the range scale located on the front of the unit.
The latch position in the reset models and the level indicator position in the recycle models shows whether the
switch is on or off.
Specifications
Electrical Ratings: 10A, 1/8 HP, 125 VAC; 5A, 1/4 HP,
250 VAC; Pilot Duty 125 VA @ 125-250 VAC
Max. Surge Pressure: 35 PSI
Max Operating Pressure: 8 PSIG
Max. Ambient Operating Temperature: 140°F (60°C)
Min. Ambient Operating Temperature: -40°F (-40°C)
Shipping Weight: 2 lbs. (.9 kg)
Options:
Panel Mount
Dust Proof
Dimensions
FRONT
4 1/16”
(103 mm)
4 1/16”
(103 mm) dia.
SIDE
4 1/16”
(103 mm) dia.
Gas Inlet 1/4” NPT
Vent 1/8” NPT
NOTE: Dimensions
are for reference only.
Range Adjustment
To adjust gas pressure set point on either high or low
pressure units, remove the electrical junction box cover,
and adjust indicator up or down to desired setting, as
shown on the range scale on front of the switch. Use the
center of the range indicating tab as a guide for accurate
setting. Turn adjusting screw clockwise to lower the set
point and counterclockwise to raise the setting. To prevent
tampering with setting after adjustment, be sure to replace
the junction box cover firmly.
Ranges Available
Ranges
Models
HGP-H
RHGP-H
LGP-H
RLGP-H
PSI Bar
1-7
1-7
1-7
1-7
.06 -.48
.41 - 1.03
.06 -.48
.41 - 1.03
.06 -.48
.41 - 1.03
.06 -.48
.41 - 1.03
6-15
6-15
6-15
6-15
1-630-784-1000 Fax: 630-784-1651 Page 1 of 4 P/N 1011089 06/10
1-800-253-2991
Natural
or
L.P. Gas
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Automatic
or Manual
Reset
Manual
Manual
Automatic
Automatic
Manual
Manual
Automatic
Automatic
Field
Adjustable
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
Model H Installation Information
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.
Electrical Information
Model: HGP-H
Duty: High Gas Reset Switch
Elec. Rating: 10A, 1/8HP, 125 VAC
5A, 1/4HP, 250 VAC
Pilot Duty: 125VA, 125-250 VAC
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.
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.
7/8”
(22 mm)
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
Reset
HGP-H
Recycle
RHGP-H
Reset
LGP-H
NC
NO
C
By Others
Reset lever will latch
when gas pressure is
below setting contact
C & NC make
Indicator On
Field wiring to be rated @75ºC for max 120ºF Ambient
Field wiring to be rated @90ºC for max 140ºF Ambient
Max Surge Pressure: 35 PSIG
Model: HGP-H
Duty: High Gas Reset Switch
Elec. Rating: 10A, 1/8HP, 125 VAC
Pilot Duty: 125VA, 125-250 VAC
NC
NO
5A, 1/4HP, 250 VAC
C
By Others
Contacts C & NC
break when pressure
rises above setting
Indicator On
Field wiring to be rated @75ºC for max 120ºF Ambient
Field wiring to be rated @90ºC for max 140ºF Ambient
Max Surge Pressure: 35 PSIG
Model: LGP-H
Duty: Low Gas Reset Switch
Elec. Rating: 10A, 1/8HP, 125 VAC
Pilot Duty: 125VA, 125-250 VAC
NC
NO
5A, 1/4HP, 250 VAC
C
By Others
Reset lever will latch
when gas pressure is
above setting contact
C & NO make
Indicator Off
Field wiring to be rated @75ºC for max 120ºF Ambient
Field wiring to be rated @90ºC for max 140ºF Ambient
Max Surge Pressure: 35 PSIG
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.
Recycle
LGP-H
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 on/off indicator, and its own range
scale indicator.
1-630-784-1000 Fax: 630-784-1651 Page 2 of 4 P/N 1011089 06/10
1-800-253-2991
Model: RLGP-H
Duty: Low Gas Reset Switch
Elec. Rating: 10A, 1/8HP, 125 VAC
Pilot Duty: 125VA, 125-250 VAC
NC
NO
5A, 1/4HP, 250 VAC
C
By Others
Contacts C & NO
make when pressure
rises above setting
Indicator Off
Field wiring to be rated @75ºC for max 120ºF Ambient
Field wiring to be rated @90ºC for max 140ºF Ambient
Max Surge Pressure: 35 PSIG
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