8.Hold burner at throat. Lift front of burner to clear orifice. Burner which holds pilot can only be removed by lifting the burner adjacent to its right first.
1" Burner
40mm Burner
Figure 30: Burner Cleaning and Installation
9.Brush top of burners with a soft bristle brush, see
Figure 30. Vacuum burners. Check orifices to see that drilled passageways are free of lint or dirt.
10.Vacuum tip of Pilot Burner.
B.Clean Firebox by vacuuming. Exercise care not to disturb insulation inside the base.
C.Install burners by reversing procedure used to remove burners. Make sure burner with pilot assembly is in same location as original installation - see Table 8.
Check burners to see that they are located properly in slot at rear of burner tray, see Figure 30. Reinstall injection shield assembly (40mm burners only, where used) and burner access panel.
Reconnect flame roll-out switch wires, pilot gas supply, thermocouple lead or pilot lead.
D.Check main burner and Pilot flames, see procedure Section II Operating Instructions, paragraphs 5 and 6.
5.Check all control and damper operation annually see procedure in Section II Operating Instructions, paragraphs 7 through 10.
6.Removal or replacement of pilot assembly or pilot assembly parts
If pilot assembly, thermocouple or pilot orifice need replacing, remove main burner with pilot using procedure described in paragraph 4.
A.To replace orifice:
1.Disconnect pilot tubing. The Honeywell Q350 pilot orifices are insert type retained by the compression fitting. The Honeywell Q327 and Q348A pilot orifices are spud type screwed into pilot burner. Replace with desired orifice. See
Key No. 5B.
2.Reconnect pilot tubing and check for leaks.
B.To replace Honeywell Q309A thermocouple in
Q327 or Q350 pilot:
1.Loosen attachment nut securing thermocouple to barrel of pilot burner. Disconnect other end at combination gas valve.
2.Remove thermocouple and replace with equal.
C.To replace complete pilot assembly.
1.Remove machine screws holding pilot burner to pilot bracket.
2.Disconnect pilot piping.
3.Disconnect all other leads to pilot.
4.Select pilot assembly with identical model number, reconnect leads and pilot tubing - resecure to pilot bracket.
D.To adjust or check spark gap between electrode and hood on Honeywell Q348A pilot.
1.Use round wire gauge to check spark gap.
2.Spark gap should be 1/8 inch for optimum performance.
E.Reinstall main burner following procedure described in paragraph 4.
7.Lubrication
There are no parts requiring lubrication on the part of the service technician or the User. Circulator bearings are water lubricated.
Table 8: Pilot Burner Location
| Main Burner with | Pilot Burner Located | |||
Boiler | Between Main | ||||
Pilot Bracket * | |||||
Model |
|
| Burners * | ||
| 1 Inch | 40mm | 1 Inch | 40mm | |
202 | 1 | 1 | 1 & 2 | ||
202X | 1 | 1 | 1 & 2 | 1 & 2 | |
203 | 1 | 1 | 1 & 2 | 1 & 2 | |
204 | 2 | 2 | 2 & 3 | 2 & 3 | |
205 | 3 | 2 | 3 & 4 | 2 & 3 | |
206 | 4 | 3 | 4 & 5 | 3 & 4 | |
|
|
|
|
| |
207 | 6 | 3 | 6 & 7 | 3 & 4 | |
208 | 7 | 4 | 7 & 8 | 4 & 5 | |
209 | 8 | 4 | 8 & 9 | 4 & 5 | |
210 | 9 | 5 | 9 & 10 | 5 & 6 | |
* Main burners numbered left to right as viewed from |
|
front of boiler. | 27 |
|
