|
| prevent corrosion of the flues on the fire |
| side. The burner should be run with the primary |
| control thermostat terminals jumpered and the |
| burner controlled directly from an aquastat |
| keeping the boiler hot all the time, thus |
| eliminating the sweating of the flues on the |
| fire side caused by starting from a cold start. |
| |
+---------------------------------------------------+

_BELT ADJUSTMENT_

The proper tension on the fuel unit belt drive is set at the factory.
However, the belt should be checked periodically to see that the setting
is maintained. To check setting, first, remove the belt guard and then,
using fingers, compress the belt at a point midway between the sheaves.
The proper setting at this point measured between the outer edges of the
belt, should be between 1-3/4" and 1-7/8". If adjustment is necessary
loosen the two mounting bolts, and move the fuel unit up or down to give
the necessary belt setting. Then re-tighten the mounting bolts securely
and replace the belt guard.

_PERFORMANCE CHECK LIST_

_QUESTION: What Causes Unit To Soot Up?_

_Answers_:

1. Nozzles
2. Flame Impingement
3. Firing Head
4. Leaks
5. Improper Burner Settings
6. Lack of Normal Maintenance
7. Poor Ignition
8. Retention Ring Cokes

_Definitions of Answers_:

1. Nozzles

A. Dirty
B. Wrong type of nozzle, or manufacturing defect

2. Flame Impingement

A. High CO_2
B. Diffuser and choke ring clearance not uniform
C. Dirty nozzle, or poor patterns
D. Leaks

3. Firing Head

A. Diffuser and choke ring clearance not uniform
B. Diffuser and choke ring face dimension out of tolerance.
(See A Dimension, Figure 1)
C. Dirty fuel systems

4. Leaks

A. Induced fan gasket, or burner gasket improperly sealed
B. Front cover assembly improperly installed or sealed

5. Improper Burner Settings

A. Unit not checked out completely by the serviceman
B. Flame pattern erratic (Not concentric). Burner set up by
CO_2 only (Burner should be set up by CO_2, smoke and visual
observation.)

6. Lack of Normal Maintenance

A. Self explanatory (Recognition of the advantages of preventive
maintenance).

7. Poor Ignition

A. No delay in oil valve, unit flutters on start up.
B. Electrodes out