OM-NGB/3
10
The manual drain valve is located under the
boiler
.
Cleaning
Whenever the boiler is turned off and allowed to
cool to about 170
o
F, it drains automatically. This
should be done every day to minimize scale build-
up inside the boiler.
In addition to this draining, however, the following
cleaning procedure should be followed using a
regular schedule. This will prevent the
accumulation of lime on the water level probes and
interior surfaces of the boiler. The actual time
between these scheduled cleanings depends on the
water quality and hours of operation. Minimally,
Groen recommends cleaning the boiler at least once
each month.
A. Suggested Tools
1. 1/2" hardened square wrench extension
2. Pipe Joint compound
3 32 oz.
Groen
Delimer Descaler (PN 114800),
Lime-A-Way or equivalent
4.
Groen
Spray Degreaser (PN 114801, or
equivalent
5. Nylon pad(s)
B. Procedure
WARNING
WATER AND VALVES MAY BE VERY HOT,
AND MAY CAUSE BURNS. PROTECT HANDS
FROM HOT SURFACES AND WATER.
1.
Turn the boiler on/off switch to the OFF position.
2.
Slowly open the manual drain valve to empty
the boiler. The valve is located under the boiler.
3.
Close the manual drain valve.
4.
Turn off water supply to the boiler.
5.
Allow the boiler to cool. This takes several
hours, so it is recommended that you cool the
boiler overnight.
6.
Turn on/off switch to “ON” to close the
automatic drain valve.
7.
Using a 1/2" hardened square wrench extension,
remove one of the 1" NPT pipe plugs from the
front of the boiler.
