Raypak RAYTHERM P-926 - Manual (Page 27)

27
SERVICING
PROCEDURES
Tube Cleaning Procedure
(Typical)
Establish a regular inspection schedule, the frequency
depending on the local water condition and severity of
service. Do not let the tubes clog up solidly. Clean out
deposits over 1/16" in thickness.
Although the illustration shows the mechanical clean-
ing procedure of a small heater, it is typical of all sizes.
The heater may be cleaned from the return header
side as shown, without breaking pipe connections. It is
preferable, however, to remove both headers for bet-
ter visibility through the tubes and to be sure the
ground up lime dust does not get into the system.
Note that you do not remove the top pan or the heat
exchanger, generally.
After reaming, mount the wire brush in lieu of the
auger and clean out the debris remaining in the tubes.
Another method is to remove the heat exchanger,
ream tubes and immerse heat exchanger in non-inhib-
ited de-scale solvent.
Burner Drawer Removal
1. Shut off power and gas supply to the pool heater.
Disconnect union(s) and pilot tubing, then loosen
and remove burner-hold down screws.
2. Disconnect wires at gas valve and slide burner
drawer out.
Gas Valve Removal
1. Shut off gas supply to the pool heater. Remove
gas piping to gas valve inlet.
2. Disconnect wires, pilot tubing and bleed line, if
required.
3. Turn vertical gas pipe from manifold slightly and
unscrew gas valve.
4. Reverse above procedure to re-install.
Extension Pieces (5) Auger with Carbide Tip Wire Brush
RAYPAK TUBE CLEANING KIT
F
Fig. 34: Tube Cleaning Kit
Fig. 35: Tube Cleaning Procedure