Super Products MUD DOG, Operator'S Manual

Page: 77 / 126

CONTROL SYSTEM OPERATION
Super Products LLC Publication: 0004175 3
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7
3
Air Purge
It is often beneficial to purge the water from all water lines
to prepare for freezing temperatures and before using the
anti-freeze injection system. The Mud Dog is equipped
with an integral air purge line and ball valve located
under the main control panel. To purge the water from
the water system:
1. Drain all water from the water tanks.
2. Open the drain petcock at the return line water pump
inlet.
3. Remove the inlet strainer cup.
4. Open the by-pass valve.
5. Connect the handgun to the water hose. (Remove
dig lances from the handgun.)
6. Open the air purge ball valve.
7. Point the handgun in a safe direction and pull the
trigger until no more water comes out. This will take
about 2 minutes (less than 1 minute without the
heater).
8. Close the air purge ball valve and wait 2 minutes to
let the chassis air supply recover. Then repeat the
previous step.
9. Open the drain valve at the water pump outlet.
10. Open the manifold drain petcock valve below the
by-pass valve and temporarily push open the quick
disconnect and fully drain.
11. Turn the water pump on for 1 second only. This
helps purge water out of the pump manifold.
12. Close the air purge ball valve.
13. Close all drain petcocks after all water is purged.
NOTES
Never depend only on blowing the water out of your
system (if you have an optional water heater) as not
all the water will drain from the heater and could
freeze causing heater coil damage.