(REFEREN cE
8.3.5
Reinstall Blowdown Port Sealing Plug, item 14, remove nozzle from secured steam cleaning gun, and
Turn on Pump Switch, item 11, and Burner Switch, item 10, allow
cleaner to operate for four or five minutes.
8.3.6
Turn off Burner Switch, item 10. Allow unit to run until cool water emerges from cleaning gun. Then
turn off Pump Switch, item 11. Close cleaning gun "on-off" valve and reinstall cleaning gun nozzle,
restart cleaner in normal manner, when operating, (gun open, burner on), open and adjust inlet and
outlet pressure gauge dampener valves, and reinstall Machinery Panel, item 18. Cleaner iS now ready
for normal operation.
NOTE :
If cleaner is badly scaled, this procedure can be repeated a few times. If repeated blowdowns
fail to reduce back pressure to acceptable limits. Cleaner should be descaled. See "Descaling
Procedure" paragraph 8.4.
WARNING
Whenever preparing cleaner for blowdown procedure be sure no personnel are within a ten (10) foot
radius of the Blowdown Port, item 13. During this procedure superheated steam will emerge from the
_--- --
-. ..-.
blowdown port. FAILURE TO D0 SO COULD RESULT IN SEVERE OR POSSIBLE FATAL INJURY TO PERSONNEL.
COIL DESCALING PROCEDURE
WARNING
Inhibited coil .desc. ling liquid contains hydrocloric acid and is both a poison as well as a
. a
corrosive chemical. The acid should not be handled unless user is properly clothed, including
rubber boots, apron, gloves, full face mask, and has read and understands the following procedure
as well as all precautions printed on acid container. FAILURE TO DO SO COULD RESULT IN SEVERE OR
POSSIBLE FATAL INJURY TO PERSONNEL.
8.4.1
Under all operating conditions mineral deposits in the water will form scale on the inside of the
heating coils requiring periodic removal. The descaling procedure Is accomplished as follows:
8.4.2
With the cleaner in normal operating mode but secured, remove both Machinery Panels, item 18 & 33,
and selected cleaning gun nozzle. Close Soap Tank Fill & Mix Valve, item 2; Gauge Dampener Valves,
itams 12 & 25 and open "ON" & "OFF Valvelve on cleaning gun, item 28. Turn off Soap Metering Valve,
item 4. Operate cleaner, burner off long enough to clear all soap solution out of system, four (4)
or five (5) minutes.
8.4.3
Shut off water pump and secure (shut off) water supply to cleaner. Turn water pump on just long
enough to reduce water level in Water Supply Tank, item 34, to approximately two (2) inches.
If water supply is through Auxiliary Hater Port, item 17, it will be necessary to first
NOTE :
reinstall Auxiliary Hater Port Sealing Plug, item 16, open Water Supply Tank Shut Off Valve,
item 36, and add enough water to Water Supply Tank, item 34 to two (2") inch level with unit
fully primed.
To avoid nuisance clogging of the cleaners Water Filter, item 37, it is recommended a dished filter
8.4.4
of steel or copper window screening be inserted on top of Water Supply Tank, item 34, and cleaning
gun be positioned and secured to permit recirculation of water from water supply tank through
cleaner, hose and cleaning gun back into water supply tank through dished filter screen.
With Pump Switcn, item 11, "on" and Burner Switch, item 10" off." (NOTE: THIS ENTIRE PROCEDURE IS DONE
8.4.5
WITHOUT HEAT.). Allow water to start recirculating. Add one (1) pint of descaler every five (5)
minutes (if badly scaled every ten (10) minutes for the first gallon) until two (2) gallons of
descaler liquid have been added. Scale remover is most effective if added slowly in this manner.
8.4.6
adding the descaler. It may be necessary to stop cleaner from time to time to remove scale accumu-
lation from dished filter screen and/or to pump excess solution into another container to avoid
overflowing water supply tank.
8.4.7
Stop cleaner's pump, remove cleaning gun and dished filter screening from water supply tank insert
cleaning gun into drain, sump, or suitable container. Open water supply to water supply tank and
circulate fresh water through cleaner until clear water emerges from cleaning gun.
NOTE :
If water supply is through Auxiliary Water Port, item 17, it will be necessary to first
remove auxiliary water port sealing plug and allow descaling solution to drain from Water
Supply Tank, item 34, and it's related plumbing, flush water supply tank with clear water
to remove any residual descaling solution then close Water Supply Tank Shut Off Valve, item 36
Reattach supply hose to Auxiliary Water port, item 17, and resume following procedures.
