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Reimers Electra Steam, Inc. 03/15/2022 AR812 Manual REV 2
Boiler repairs must be performed by
experienced personnel only. Ensure boiler
water is cold and drained and that there is no pressure and
all electricity to the boiler is shutoff.
All boilers must be blown off periodically to remove
minerals, scale and other foreign matter, which accumulate
inside the pressure vessel. The concentration of this
deposit depends in part upon the condition of the water in
the area. When water is naturally soft, or has been
softened chemically, boiler blowoffs are required less often
than in areas where hard water is found. Water softeners
are suggested in hard water areas to minimize the
formation of hard scale on heating elements. Another factor
affecting water condition is the amount of condensate, if
any, that is being returned to the boiler. Since condensate
is essentially clean distilled water, it contains very few
impurities. If a large part of the condensate is being
returned and little makeup water is used, the boiler need
not be blown down as often as when little or no condensate
is returned to the boiler. We recommend blowoff of newly
installed steam boilers once per day until the first heating
element and pressure vessel inspection is performed (refer
to chapter 3.4). If no significant amount of sediment is
found on the bottom of the pressure vessel and on the
heating element sheaths, then the boiler blowoff frequency
can be reduced accordingly. The safest method to blowoff
Rseries steam boilers is to install a Reimers Electra
Steam, Inc. properly sized and fully trimmed blowdown
tank, model BTANK10. Reimers blowdown tanks are
designed and constructed to Section VIII of the A.S.M.E.
Code and inspected by a commissioned National Board
Boiler inspector.
3.1.1 Boiler Blowoff Frequency
In areas where water is soft or has been softened
chemically:
• When little condensate is returned blowdown once every
second day
• When a large part of the condensate is returned and little
makeup water is used, blowdown once every week.
In areas where hard water exists:
• When little or no condensate is returned, blowdown
once
• When a large part of the condensate is returned and little
makeup water is used, blowdown once every second
day
Stand clear of scalding water or steam.
Ensure that the Boiler Bottom Blowoff
Valve is properly piped.
This test should be performed once per month. Proceed as
follows:
• Increase the steam pressure as
shown in chapter 2.2 to
maximum operating pressure.
• Keep the steam outlet valve
closed
• Pull the trip lever and hold open
for five (5) seconds in order to
flush off the valve seat.
• Permit the valve to “slap” shut. If
a leak occurs, repeat this test
and if necessary, replace the
valve.
Ensure that the boiler is cold, drained
and all power supplies are
disconnected
Clean the element rods every six (6) months. To clean the
element rods, or if an element must be replaced, proceed
as follows:
• Remove the lower front cover
• Remove the element terminal cover from the front of the
boiler.
• Disconnect and label the terminal wires
• Remove all four (4) nuts from each element flange and
pull out the heating element
• Use a stiff wire brush to remove all scale and foreign
matter from the element rods.
• Clean the element flange surfaces before installing new
elements and gaskets
Ensure that the boiler is cold,
drained and all power supplies are
disconnected.
In order to provide reliable automatic water level control,
the water level probes are located inside a funnel shaped
probe baffle, welded to the inner wall of the pressure
vessel. The probe baffle has direct connection to the top
and bottom of the pressure vessel so that the probes can
read the water level, protected from foam and bursting
steam bubbles that form on the surface of the boiler
water.
The probe baffle must be cleaned every six (6) months of
sediments and other debris that accumulates at the bottom
of the baffle. To accomplish this, proceed as follows:
Step 1:
Remove the water
level probe cover,
disconnect from each
probe the wire and
label it.
Remove first the Short
Probe and inspect the
probe rod. If sediment
has accumulated, use
a stiff wire brush to
remove it. Install the
probe in its place in
the shell.
Repeat the above
cleaning procedure for
the other probe (if
applicable).
Don’t install the probe(s) yet.
Step 2:
Remove the pipe plug from the boiler blowoff line as
shown in FIGURE 17.
Step 3:
Insert two (2) 1/4in OD copper tubes or any other soft rods
through the probe opening and through the boiler blowoff
opening into the pressure vessel to remove sediments from
3. Boiler Maintenance
3.1 Boiler Blowoff
3.2 Safety Valve Test
3.3 Element Replacement and Element Cleaning
WARNING
WARNING
3.4 Water Level Probe and Probe Baffle Box Cleaning
WARNING
WARNING
Element Rods
Long
Probe Short
Probe
(If Installed)
FIGURE 15
FIGURE 16
FIGURE 17