Raypak 0180B Type H Repair Procedures, Tube Cleaning Procedure Typical, Heat Exchanger Removal

Burner Tray Removal

1.Shut-off power and gas supply to the boiler. Disconnect union(s) and pilot tubing when pres- ent; then loosen and remove burner hold-down screws.

2.Disconnect wires at gas valve and slide burner tray out.

Main Burner and Orifice Removal

1. Remove screws and burner hold-down bracket.

NOTE: If the heat exchanger is sooted badly, the burner hold-down bracket and spacer can become distorted from direct flame impingement and this usually necessitates replacement of these parts.

2.Lift burners from slotted spacer and slide from ori- fices. Clean with a wire brush.

3.Orifices usually do not need to be replaced. To clean, run either copper wire or wood through ori- fice. Do not enlarge hole. To remove orifice, use a socket wrench and remove the manifold. DO NOT over-tighten when reinstalling.

REPAIR PROCEDURES

Tube Cleaning Procedure (Typical)

Establish a regular inspection schedule, the frequency of which depends on the local water condition and severity of service. Do not let the tubes clog up solid- ly. Clean out deposits over 1/16" in thickness.

To clean the tubes, remove the heat exchanger, ream tubes and immerse heat exchanger in non-inhibited de-scale solvent.

Heat Exchanger Removal

1.Shut water, gas and electricity off, close valves, relieve pressure and remove relief valve. Remove front inspection panel.

2.Remove top holding screws.

3.Remove draft diverter, lift and remove top and flue collector on stack type models.

4.Loosen bolts and disconnect flange nuts on inlet/outlet header, loosen union(s) at gas pipe, and slide boiler away from piping until studs clear the heater.

5.Lift heat exchanger straight up using caution not to damage refractory.

	RAYPAK TUBE CLEANING KIT
Extension Pieces (5)	Auger with Carbide Tip		Wire Brush
5/8" - PN 052871F		7/8" - PN 052870F
	Fig. 35: Raypak Tube Cleaning Kit

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