The following steps and diagram indicate the locations of the connection points required to check the differential air pressure.

The differential air pressure switch is a safety device which will prevent the boiler from firing if there is an air intake, boiler heat exchanger or vent blockage.

Turn off service switch, or lower thermostat setting.

Remove vinyl caps from Tee and 4- way connector.

Install testing lines as shown to inclined manometer or differential pressure gauge with the ability to read 0.01” to 2.0” w.c.

Turn on service switch and set thermostat to call for heat.

Boiler Status

Differential Pressure (w.c.)

Pressure Switch Connects

 

 

 

Not Running

0”

Normally Open

Setpoint

1.00” for Model-100

 

 

1.35” for Model-75

 

 

1.55” for Model-50

 

Running Without

Greater Than Setpoints

Closed

Blockage

 

 

Running With

Less Than or Equal to

Open

Blockage

Setpoints

 

If manometer readings do not correspond to the chart above, check for possible causes:

-Blockage or moisture in suction lines

-Blockage in air intake or vent pipes

-Undersized air intake or vent pipes

-Loose blower wheel or motor shaft

-Inncorect pressure switch or pressure switch setpoint

When pressure reading is proper and the pressure switch is operating properly, remove testing lines and reinstall vinyl caps to Tee and 4-way connector.

C.

DIFFERENTIAL AIR PRESSURE SWITCH CHECK

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Quantum GAS-FIRED BOILERS installation instructions Differential AIR Pressure Switch Check

GAS-FIRED BOILERS specifications

Quantum gas-fired boilers represent a significant advancement in the realm of residential and commercial heating solutions. These innovative systems efficiently utilize natural gas to deliver consistent heating, catering to a wide range of climates and applications. With rising energy costs and increasing environmental concerns, the adoption of gas-fired boilers has gained momentum, making them a popular choice for heating needs.

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