mr
.
steam
®
C U S E R I E S
Installation, Operating & Maintenance Manual
Steam Line
1. The steam solenoid valve should be plumbed as close as
practical to the steam room using only brass pipe or copper
tubing but must remain accessible for service or replace-
ment. The steam solenoid must be plumbed horizontally.
2. Pitch the steam line a minimum of 1/4”per linear foot of
run, towards the steam outlet on the generator, avoid val-
leys and trapping of condensate.
3. Fully insulate steam lines with suitably rated high tempera-
ture insulation.
5. Provide unions as required to facilitate installation and
disconnection of piping.
Drain
In accordance with Code requirements, provide a drain line
connection from the steambath generator drain valve(s). If an
Auto Blowdown is used, the drain line must be connected to
the automatic blowdown valve. Refer to National and local
plumbing Codes for drain requirements including receptor,
trap, vent requirements and drain lines.
Safety Valve
Where permitted by Code,
provide a connection for safety
valve discharge.
DO NOT
con-
nect a shut off valve or plug at
the safety valve outlet.
DO
NOT
reduce outlet size of
safety valve discharge.
INSTALLATION
PLUMBING
All plumbing shall be performed by a qualified
licensed plumber and in accordance with
applicable National and local Codes.
Water Supply
1. Connect to hot or cold water line. A hot water
line is preferable, however incoming hot water
should not exceed 160°F
The
low
temperature
setting
on
many
hot
water
heaters
provides
120°F
water
2. Provide a service shut off valve and water-line
strainer in the water supply line upstream to
the steambath generator
3. Flush the inlet water line thoroughly
before making connection to the steam-bath
generator.
4. Incoming water supply should be at least 25
psig and is not to exceed 100 psig.
5. Install a back flow preventor as required
by Code.
6. Provide anti-water hammer device as required
in accordance with Code.
7. Provide unions as required to facilitate installa-
tion and disconnection of piping.
8. Recheck all factory and field plumbing con-
nections for tightness.
WATER
QUALITY
INFORMATION
For
optimum
results,
the
feedwater
supply
should
be
tested
prior
to
initial
startup.
If
the
mineral
con-
tent
exceeds
the
following
recommended
limits,
various
external
treatment
processes
may
be
used
to
correct
the
problem
.
An
analysis
of
the
on-site
boiler
feed-
water
must
be
made
by
a
recognized
and
reliable
water
treatment
company
to
ascertain
the
existing
condition
and
treatment
required.
Recommended
Feedwater
Quality
Hardness, ppm
8 – 85 (~0.5 – 5 gpg)
P-Alkalinity, ppm
85 – 410 (~5 – 24 gpg)
T. Alkalinity, ppm
200 – 500 (~7 – 0 gpg)
pH (strength of alkalinity)
8.0 – 11.4
Blowdown boiler at least a once a day. If boiler
water or feed-water are outside the above limits,
a more frequent blowdown is required.
Recommended Limits Within a Boiler
Total Dissolved Solids, ppm 3500 Sulfite (SO3), ppm
25 – 50
Total Alkalinity, ppm
850
Phosphate, ppm
30 – 60
Suspended solids, ppm
300
P-Alkalinity as CaCO3, ppm900
Silica (SiO2), ppm
125
Iron, ppm
2
Specific resistivity maximum 50k
Ω
•cm (50,000 ohm-centimeter).
Water quality can affect efficiency or result in boiler damage if
neglected. Boiler feedwater contains impurities in solution and
suspension. These impurities concentrate in the boiler. The con-
centration of these impurities increases as more feedwater is
introduced into the boiler and steam is produced. If the sus-
pended solids are allowed to concentrate beyond certain limits,
a deposit or “scale” will form on the boiler internal surfaces.
This deposit can interfere with the proper boiler operation and
cause boiler failure.
The concentration of these impurities is generally controlled by
the feedwater quality and by blowdown. Blowdown refers to
removing a portion of the boiler water with high solids concen-
tration and replacing it with makeup water of a lower concen-
tration.
P I P E S I Z E G U I D E
Steam Outlet:
1" or 1
1
⁄
2
Steam Solenoid Valve:
3
⁄
4
"
Steam Head:
3
⁄
4
"
Drain Outlet:
1"
Steam Piping
(Field Supplied)
3
⁄
4
"
10
