Xylem McDonnell & Miller PSE-800-M, Application, Installation, Operation, And Maintenance Manual

Commissioning, Startup, Operation,

and Shutdown

Start up the boiler

1. Before filling the system, turn on the electric power to the boiler.

a) Upon initial power up, the green and red lights will flash simultaneously four times.
b) The green light will turn on and the red light will begin to flash.
c) After 60 seconds, the red light will stop flashing and will remain on.
d) The burner will never turn on as long as there is no water on the probe.

2. Fill the boiler with water.

a) When water touches the probe, the green and red lights will remain on.
b) After depressing manual reset button, the green and red lights will flash four times

simultaneously.

c) The green light will then turn on and the red light will turn off.
d) The burner will turn on as long as there is water on the probe.

Test the probe

Drain water from the boiler.
a) The burner turns off and the Red light begins to flash when there is no water on the

probe.

b) After 60 seconds, the red light will stop flashing and will remain on.

IMPORTANT: If water returns to the level of the probe at any time while the red light
flashes, then the control automatically resets.

c) The control is now locked out. The manual reset button has to be depressed when

water touches the probe.

Test the manual reset button

1. Test the cycle by depressing and holding the test button. The burner turns off and the

red light begins to flash.

2. Red light stops flashing and remains on after 60 seconds.
3. Control is now locked out and burner remains off when test button is released.
4. Depress manual reset button. Green and red lights flash simultaneously four times.
5. Green light turns on and red light turns off.
6. Burner turns on as long as there is water on the probe.

Commissioning, Startup, Operation, and Shutdown

PSE-800-M Low Water Cut-off Installation, Operation, and Maintenance Manual

13