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HBG EVAPORATOR OPERATOR’S MANUAL
9
HBG • 8.913-990.0-K
NOTE: The HBG op tion al autofi ll air diaphragm
pump is au to mat i cal ly con trolled by fl oats and will
sup ply waste wa ter as need ed after startup.
CAUTION: Foam ing chemicals will af fect the
evap o ra tion pro cess in the HBG. An anti-
foaming agent may need to be added to coun-
ter act the foam.
An automatic anti-foam dispenser can be used to
au to mat i cal ly add anti-foam (8.906-074.0). Contact
your WATER MAZE representative to pur chase the
de foam er best suit ed to your ap pli ca tion. (De foam er
sold sep a rate ly.)
6. VENTING - Each evaporator must have its own vent
stack — A 6" vent pipe (HBG-15) and 10" vent pipe
(HBG-30). The stack temperature will reach 650°F.
Recommended Materials:
1.Type L Vent Pipe
2. Stainless Steel Pipe
3. Boiler Stacking
NOTE: If possible, the stack should be a single piece.
However, if the stack has seams, the seams must be
sealed with duct sealant to prevent mois ture leaks;
since the exhaust is water saturated. A tube of RTV
silicone will be supplied with each ma chine shipped
for this pur pose. Moisture leakage may result in
dam age to the HBG electrical sys tems. All stack
in stal la tions must be per formed only by qualifi ed
per son nel.
The top of the exhaust stack should be suffi ciently
high above the roof for proper dispersion of the
ex haust. The stack should be unobstructed and in
com pli ance with all local and federal codes. Avoid
90° bends in the stack. A straight stack is always
best.
A vertical dis charge design should be used, to geth er
with a vertical rain diverter. A con ven tion al rain cap is
not rec om mend ed for the HBG because of in duced
back pres sure. A vertical rain diverter is an over-
sized piece of stack ma te ri al that is con cen tric with
the stack. The diverter ex tends 6" down over the top
of the stack to al low fl ex i bil i ty in po si tion ing fas ten ers.
Both rain pro tec tion and back pres sure re duc tion is
achieved with this de sign. This type of rain diverter
can be pur chased from your local deal er.
7. Air Requirements - An air compressor capable
of de liv er ing a minimum of 4 cubic feet per minute
(CFM) of air at 60-100 psi to work the op tion al auto
fi ll air di a phragm pump and air as sist ed defoamer
sys tem. NOTE: Air supply must be on at all times
for ma chine to op er ate
2' Min.
6" Flue Rain Cap
(optional) 8.717-740.0
10" Flue Rain Cap
(optional) 8.717-742.0
Roof
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