CAUTION
When necessary to remove burners, be sure to reinstall them in the original manner by engaging the orifice and locating hole in the rear of the burner tray. Burners must be aligned with the burner manifold.
F.Remove Burners for cleaning, changing orifice plugs, or repairs.
1.Turn off electric service to boiler.
2.Turn off gas supply to boiler.
3.Remove jacket front panel.
4.Disconnect pilot tubing at gas valve.
5.Disconnect thermocouple tubing at gas valve (Continuous Ignition only). Disconnect igniter/ sensor cable and ground wire at ignition module
Intermittent Ignition (EI) only. Disconnect flame
6.Remove burner access panel.
7.Mark location of pilot main burner on manifold.
8.Hold burner on throat. Lift slightly to clear orifice.
Pull burner from combustion chamber. See Figure 10. Pilot main burner can only be removed by lifting at 45° angle after adjacent burner to right is removed (1" burners only).
9.Check burners to be sure they do not contain foreign matter or restrictions. Clean burners with a soft bristle brush, blow any dirt out with compressed air or use a vacuum cleaner. See Figure 58.
G.Remove Pilot Assembly for Servicing. Remove machine screw(s) holding pilot burner to pilot bracket, after first removing burner with pilot assembly as described in Step F, number 8 above. To adjust or check spark gap between electrode and hood on Honeywell Q348 intermittent (EI) pilot, see Figure 59.
l. Use a round wire gauge to check spark gap.
2.Spark gap should be 0.125" for optimum performance.
Figure 59: Honeywell Q348 Spark Gap
H.Install Burners by reversing procedures used to remove burner. Main burners must be in slots in rear of burner tray and seated on main burner orifices.
Reconnect pilot gas supply, and thermocouple lead (continuous ignition) or igniter/sensor/ground. See Table 11 for Pilot Burner location.
Table 11: Pilot Burner Location
Boiler Size | Pilot Located Between Burners* | |||
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1 inch | 40mm | |||
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IN3 | 1 | & 2 | 1 & 2 | |
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IN4 | 2 | & 3 | 2 & 3 | |
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IN5 | 3 | & 4 | 2 & 3 | |
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IN6 | 4 | & 5 | 3 & 4 | |
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IN7 | 6 | & 7 | 3 & 4 | |
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IN8 | 7 | & 8 | 4 & 5 | |
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IN9 | 8 | & 9 | 4 & 5 | |
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IN10 | 9 & 10 | |||
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IN11 | 11 & 12 | |||
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IN12 | 12 | & 13 | ||
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*Burners numbered left to right as viewed from front of boiler.
I.Lubrication. Manufacturers Instruction should be followed on all parts installed on boiler requiring lubrication. This includes:
1.Type of lubricant to be used.
2.Frequency of lubrication.
3.Points to lubricate.
J.Check operation. Follow Steps B through L and Step O from Section IX: System
K.Conversion Kits. Follow all instructions provided with kits. Note that Rating Label provided in kit must be used. Apply over or beside original Rating Label allowing the original Serial Number to remain visible.
L.Tankless Heater.
1.Flushing of Heater. All water contains some sediment which settles on inside of coil. Consequently, heater should be periodically backwashed. See Figure 28. Allow water at city pressure to run into hosebib A, through heater, and out hosebib B until discharge is clear. The tees in which the hosebibs are located should be the same size as heater connections to minimize pressure drop.
2.Adjust and maintain mixing valve (tempering valve) in accordance with manufacturer's instructions.
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