Raytherm WH-0133, Installation & Operating Instructions Manual, Page: 47 / 52

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9. DO NOT apply excessive torque during rolling
operation and avoid thinning any wall of the tube
beyond 0.015".
10. Use same procedure on opposite end.
11. Apply line pressure test. Re-roll if necessary.
12. Reinstall as outlined under HEAT EXCHANGER
REASSEMBLY.
Cleaning Flue Gas
Passageways
Soot will clog areas between fins and cause eventual
tube failure. Any sign of soot at base of burners or
around outer jacket indicates a need for cleaning.
1. Lift off drafthood and flue collector by removing
bolts and screws.
2. Remove "V" baffles from heat exchanger.
3. Remove burner tray.
4. Take garden hose and wash heat exchanger, mak-
ing sure soot is removed from between fins. (Avoid
excessive water against refractory).
5. Reassemble: When heater is fired, some steam
will form from wet refractory. This is normal.
6. Identify and correct reason for soot formation.
REPLACEMENT PARTS
See separate parts sheet in instruction envelope.
Any part returned for replacement under standard
company warranties must be properly tagged with
RAYPAK return parts tag, completely filled in with the
heater serial number, model number, etc., and shipped
to the Company freight prepaid. If determined defec-
tive by the Company and within warranty, the part will
be returned in kind or equal substitution, freight collect.
Credit will not be issued.
RAYPAK, INC.
2151 Eastman Avenue
Oxnard, CA 93030
NOTE: In extreme cases it may be necessary to
remove the heat exchanger completely for cleaning.
The simplest method is high pressure cleaning at a
local car wash. DO NOT WIRE BRUSH!
CAUTION: Soot is combustible, so exercise
extreme care.
NOTE: To supply the correct part it is important that
you state the model number, serial number and type
of gas when applicable.