Submittal Sheet

Table Of Contents

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9

customer.honeywell.com

L4079A,B,W PRESSURETROL

LIMIT CONTROL

® U.S. Registered Trademark

60-2156—03 M.S. Rev. 05-07

Manual Resetting

When the circuits have broken automatically, they must be

manually reset. After the pressure returns to normal, manually

reset by depressing the manual reset button(s) firmly and

releasing. The circuit is not complete until the reset button is

released. The trip-free manual reset mechanism prevents the

limit controller from operating as an automatic controller (self-

resetting) even if the manual reset button has been tied down.

CHECKOUT

After the control has been installed and wired, test as follows:

Note the boiler pressure by checking the boiler pressure

gauge (boiler pressure should be near the middle of the

PressureTrol

pressure scale to perform this test properly).

Rotate the PressureTrol

pressure adjusting screw (see FIg.

3) until the pressure setting indicator on the front of the case

corresponds to the boiler pressure gauge reading.

The limit control should break the control circuit(s) when the

boiler pressure gauge reading equals or slightly exceeds the

PressureTrol

pressure setting.

If the limit control is operating properly, manually reset it and

adjust the pressure adjusting screw until the pressure setting

indicator is in line with the required limit setpoint.