Reimers HLR120, Instruction Manual

Page: 11 / 14

PAGE 11 Reimers Electra Steam, Inc. 01/10/2022
HLR 120‐180 Manual ‐ English REV 1
Frequency: Under normal operating
conditions test valve every two (2)
months. Under severe service
conditions or if corrosion and/or
deposits are noticed within the valve
body, testing must be performed
more often. A test must also be
performed at the end of any non­
service period.
Test the safety relief valve
(preferably near its maximum
pressure setting by holding the test
lever fully open for at least 5
seconds to flush the valve seat free of sediment and
debris. Then release and permit the valve to snap shut.
­ Close the water inlet and outlet stop valves (FIGURE 10)
­ Turn off and lock out all boiler power supplies
­ Ensure that the boiler drain valve (FIGURE 10) is piped
to a safe point of discharge
­ Open the boiler drain valve carefully and drain the
pressure vessel. As soon as there is no pressure present
in the vessel, open the bleeder valve (FIGURE 7) slightly
to break the vacuum
* Water Inlet and Outlet Stop Valves are not provided with
the boiler
­ Remove the left pressure vessel jacket end cap to
access the heating elements
­ Label the wires of heating elements and disconnect from
the terminals
­ Remove the four (4) nuts from each heating element
flange and pull the elements slowly out of the pressure
vessel
­ Inspect and if necessary remove with a stiff wire brush
rust, calcium or other deposits from the element rods
­ Insert a flash light through one heating element opening
and inspect through the second opening the inner walls
of the pressure vessel. It is normal that the inner walls of
the vessel be covered by a layer of red, brown or black
layer of rust. However,
rough pressure vessel
surface and layers of rust
peeling off the surface are
an indication for severe
corrosion. In such case,
contact a water treatment
company.
­ Install the heating elements back into the boiler pressure
vessel, following the above procedure in reverse order.
­ After installing the pressure vessel jacket end cap, turn
on all power supplies of the boiler.
­ Flip the red POWER switch of the boiler controller to the
ON­position and leave the operating mode selector
switch in the middle (OFF­position)
­ Observe the LOW WATER alarm light in the boiler
controller front panel. If it turns ON, the low water cut­off
device works properly.
­ Close the boiler drain valve, open the inlet and outlet
valves and with the bleeder valve open, refill the boiler
pressure vessel. Close the bleeder valve as soon as it
discharges water.
­ Press the LOW WATER RESET switch. The LOW
WATER alarm light should turn OFF.
­ The hot water boiler should be ready for operation.
3.5.1 Testing the Electronic Low Water Cut­Off Device Only
Frequency: Any time.
­ Press and hold the LOW WATER CUT­OFF TEST switch
on the boiler controller panel
­ After 3 seconds, the HEATING indicator light – if it was
ON – will turn OFF; the LOW WATER alarm indicator
light will turn ON
­ Press the LOW WATER RESET switch to de­activate the
LOW WATER alarm
3.5.2 Testing the Entire Low Water Cut­Off System
(Electronic Low water Cut­Off Low Water probe)
Frequency:
90 days after installation, then once every year
­ Flip the boiler operating mode selector
switch to the middle (OFF­position)
­ Close the water inlet and outlet stop
valves (FIGURE 10)
­ Turn off and lock out all boiler power
supplies
­ Ensure that the boiler drain valve
(FIGURE 10) is piped to a safe point of
discharge
­ Open the boiler drain valve carefully
and drain the pressure vessel. As soon
as there is no pressure present in the
vessel, open the bleeder valve
(FIGURE 7) slightly to break the
vacuum.
­ Flip the red POWER switch of the boiler controller to the
ON­position and leave the operating mode selector
switch in the middle (OFF­position)
­ Observe the LOW WATER alarm light in the boiler
controller front panel. If it turns ON, the low water cut­off
device works properly.
­ Close the boiler drain valve, open the inlet and outlet
3.4 Element Inspection, Replacement, and Element
Cleaning
WARNING
Element Rods
3.5 Testing the Low Water Cut­Off Device
3.3 Testing the Safety Relief Valve
CAUTION
Before testing, make certain that
the discharge pipe is properly
connected to the valve outlet and
arranged to contain and safely
dispose of boiler discharge.
Maintenance work must be
performed by experienced
personnel only. Ensure boiler is
cold and drained and has no
pressure or electricity.
Water Inlet
Stop Valve*
Water Outlet
Stop Valve*
FIGURE 9
FIGURE 10
Boiler Drain
Valve*
Selector
Switch
FIGURE 12
FIGURE 11