Owner's manual

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SECTION 3 HPN-IOM-2014-0416 OPERATION

3-23

! WARNING

Do not operate, or allow others

to operate, service or repair this

equipment unless you (they) fully

understand all applicable sections

of this manual and are quali ed to

operate/maintain the equipment.

Non-Fulton product information is for

reference purposes only. No Fulton

document may substitute for full

review of documentation available

from the component manufacturer.

to maintain the proper  ow. Pressure changes are monitored with these

switches, which will shut the unit down in case of a change in the  uid  ow.

 TO TEST THE SWITCHES

1. With three position switch set to “Pump”, remove the cover from the

pressure switch and manually trip the switch. Pump should shut down.

2. Repeat for each switch; replace covers. Note, if the burner was on, it would

also stop.

3. To set the inlet low  uid pressure cutout switch, raise the setpoint with

the  uid at operating temperature and pump running, until the pump

shuts down. Note the setpoint and lower by 10 PSI, then restart pump. The

setpoint at cutout should correspond to the reading on the inlet pressure

gauge.

4. With the unit cold and pump running, lower the high  uid pressure cutout

switch until the pump shuts down. Note the setpoint and raise by 10 PSI,

then re-start pump. The setpoint at cutout should correspond to the inlet

gauge reading.

5. With the unit running at operating temperature, lower the high outlet

pressure switch until the pump shuts down. Note the setpoint and raise

by 10 psi, then restart the pump. The setpoint of this switch should

correspond to the outlet pressure gauge reading.

NOTE:  Switch settings shall never exceed the safety valve set pressure..

 Operating Limit Controller

The limit controller is mounted in the panel box door. This limit controller senses

temperature in the outlet manifold. The temperature setpoint in the controller

may be adjusted per manufacturer’s instructions.

FIGURE 14  HIGH/LOW GAS PRESSURE SWITCH