Antunes Controls H Service manual

Installation Information
Gas Pressure Switches
Specifications
Antunes Controls Gas Pressure switches monitor gas
pressure. The models are available in high pressure and
low pressure single gas switches. Pressure range varies
from 1 PSI to 15 PSI.
Each switch is adjustable within its range, as shown on
the range scale on the front. The latch position in the reset
type models, and level indicator position in the recycle type
models show whether the switch is on or off.
Model-H
Model - HGP-H
GHI 1010803H23 01/04
R
L
R
L
R
L
Please read this instruction sheet 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 an interlocking switch
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 housing for leaks
with a soap bubble test. All exhaust fans and
blowers should be inspected and checked for
proper rotation prior to starting up. If you have any
problems or questions, phone, fax, email or write to
the manufacturer, Antunes Controls.

MODEL - H
Range Adjustment - All Models
Dimensions
Operation
4 1/16”
(103 mm) Dia.
Front
3 5/8”
(92 mm)
Inlet 1/4” NPT 4 1/16”
(103 mm) Dia.
Vent 1/8” NPT
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.
Reset Latch
Range Scale
Reset Models
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 the 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.
Side

MODEL - H
Mounting: Simple Mounting - All Models
Mounting: Simple Mounting - All Models
7/8”
(22 mm)
Mounting Bracket
2-5/8”
(67 mm)
1-1/8”
(28 mm)
1/2”
(13 mm) All Mounting Holes (Dia.)
7/32” 5/16” 7/32”
(5.5 mm) (8 mm) (5.5 mm)
1/2”
(13 mm)
Model: LGP-H
NC
NO
C
By Others
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
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
Reset lever will latch
when gas pressure is
below setting contact
C & NC make
NC
NO
C
By Others
Reset
HGP-H
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
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
Contacts C & NC
break when pressure
rises above setting
NC
NO
C
By Others
Recycle
RHGP-H
Reset lever will latch
when gas pressure is
above setting contact
C & NO make
Reset
LGP-H
Duty: Low Gas Reset Switch
Elec. Rating: 10A, 1/8HP, 125 VAC
5A, 1/4HP, 250 VAC
Pilot Duty: 125VA, 125-250 VAC
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
Indicator Off
Model: RLGP-H
NC
NO
C
By Others
Contacts C & NO
make when pressure
rises above setting
Recycle
LGP-H
Duty: Low Gas Reset Switch
Elec. Rating: 10A, 1/8HP, 125 VAC
5A, 1/4HP, 250 VAC
Pilot Duty: 125VA, 125-250 VAC
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
Indicator Off
Electrical Information
All gas pressure switches must be mounted in a horizontal
position, with the inlet stem down. Switches should be
reasonably leveled but do not require accurate leveling.
Single gas switch models have a  NPT gas 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.
Maximum surge pressure: 35 PSIG
Maximum ambient operating temperature: 140°F (60°C)
Minimum ambient operating temperature: -40°F (-40°C)
Models Available Each Switch is adjustable within the ranges shown
Reset Recycle
LGP-H Single Unit, Low Pressure RLGP-H
HGP-H Single Unit, Hi - Pressure RHGP-H
Ranges Available
High Gas Pressure Low Gas Pressure
HGP-H, RHGP-H LGP-H, RLGP-H
1 to 7 PSI 1 to 7 PSI
6 to 15 PSI 6 to 15 PSI

It is understood and agreed that seller’s liability whether in
contract, in tort, under any warranty, in negligence or otherwise
shall not exceed the return of the amount of the purchase
price paid by purchaser and under no circumstances shall
seller be liable for special, indirect or consequential damages.
The price stated for the equipment is a consideration in limiting
seller’s liability. No action, regardless of form, arising out of the
transactions may be brought by purchaser more than one year
after the cause of action has accrued.
1. Antunes Controls products are guaranteed to be free from mechanical and electrical defects for a period of one year
from date of shipment under normal use and service provided installation is made in accordance with manufacturers’
recommendations.
2. Parts deemed defective shall be repaired or replaced at manufacturers option and at manufacturers expense but
shall not include foreign or federal excise taxes, state or municipal sale or use taxes, all such taxes not limited to the
foregoing being responsibility of the purchaser.
3. No charge for travel and/or mileage will be allowed to purchaser.
4. Antunes Controls reserves the right to make changes in design or make any improvements on any products. The
right is always reserved to modify our equipment because of new technology, underwriter’s requirements and/or
government regulations.
5. The following are not covered under warranty:
a. Failure from neglect, abuse, careless handling and mis-application of unit.
b. Failure to observe guidelines for installation or improper voltage hook-up.
c. Failure caused by improper maintenance. (See maintenance guidelines found in operation instructions.)
d. Unless specifically allowed by Antunes Controls, no other charges may be included under warranty.
Limitation of Liability
Warranty
www.ajantunes.com
180 Kehoe Boulevard • Carol Stream, Illinois 60188 • USA • Ph: [phone] • [phone] • Fx:[phone]