Owner's manual

MAINTENANCE HPN-IOM-2014-0416 SECTION 4

4-6

! WARNING

All information in this manual is for

reference and guidance purposes,

and does not substitute for required

professional training, conduct,

and strict adherence to applicable

jurisdictional/professional codes and

regulations.

4 CAUTION

All maintenance procedures should

be completed by trained personnel.

Appropriate training and instructions

are available from the Fulton Service

Department.

FIGURE 19  STACK LIMIT SWITCH

 Soot Cleaning

If your coil inspection indicates severe sooting, the following procedure should

be followed:

1. Make sure the heater is o and  uid is ambient temperature.

2. Remove the burner and lower access doors.

3. Wire brush coils and use compressed air where accessible.

4. Vacuum loose soot where accessible.

5. Reinstall the burner and lower access doors.

6. Fire the heater and set combustion.

Safety Check Procedures

Perform the following safety checks as needed:

 Liquid Level Switch

Manually turn liquid level switch cam counterclockwise. See Figure 10. Micro-

switch will open contacts and control voltage will be lost. Release cam and

micro-switch will make and control voltage will be restored.

 Stack Limit

The limit manufacturer presets the stack limit. Testing can be performed by

removing switch from stack and applying heat over that of the switch set point

for several seconds. The switch can then be reset and re-installed. See Figure 19.