Water Conditioning; Specifications; Water Supply; Electrical - Vulcan-Hart MHB24G Service Manual

WATER CONDITIONING

Furnishing the boiler with treated water to reduce
scale formation is important. Scale formation will
reduce steam output, cause premature component
failure, and shorten equipment life. Most water
supplies contain scale producing minerals such as
Calcium and Magnesium. As steam is generated,
the minerals remain and dissolve into the water. As
the concentration of these minerals increases past a
certain point, they precipitate from the water and
coat the inside of the boiler, heating elements, and
water level sensors. Because of the high
temperature of these surfaces, the precipitated
minerals bake onto them and become very difficult
to remove.
This may cause several problems:
1. Reduced heat transfer efficiency.
2. Premature heating element failures.
3. False readings from water level sensors.
These problems are common to any manufacturer's
steamer regardless of design, but they can all be
minimized by furnishing the boiler with treated
water.
Other factors affecting steam generation are iron
content, amount of chlorination and dissolved
gases.
The desired water properties can best be achieved
by using a properly maintained water treatment
system.
The water level probes in the boiler use ions in the
water to detect the water level. Do not use fully
demineralized or de-ionized water since it is
"non conductive" and the water level can not be
detected.
The use of strainers or non approved filters will not
remove minerals from the water.
Water supplies vary from state to state and from
locations within a state. Therefore, a water
treatment specialist should be consulted before
the installation of any steam generating equipment.
Steamers that operate over a long period of time
without the benefit of a water treatment system,
which have developed a heavy scale build up,
should be cleaned before using the system.
F24700 (October 2001)
VHX SERIES STEAMERS - GENERAL

Water Supply

The fact that a water supply is potable is no
guarantee that it is suitable for steam generation.
The supply connection to the steam generator
should be "treated" water and must be within the
guidelines listed below. For drain water cooling only,
an "untreated" water supply connection should be
used.

Electrical

Voltage - 120/60/1
Amps

Boiler Pressure

Operating - 8 to 10 psi
Maximum - 15 psi
Page 6 of 68

SPECIFICATIONS

Supply pressure should be
In line strainer for supply line
Supply connection
Total dissolved solids (TDS)*
Total alkalinity
Silica
Chloride
PH factor
(*17.1 ppm = 1 grain of hardness)
- 3.0 (max)
20-60 psig
(Not Supplied)
cold
less than 60 ppm
less than 20 ppm
less than 13 ppm
less than 30 ppm
7 to 8