Reimers HLR15 User manual

PAGE 1
Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
4407 Martinsburg Pike Phone: 5406623811
Clear Brook, VA 22624 Fax: 5406658101
USA email: [email protected]
web: www.reimersinc.com
_______
MODEL:
________
SERIAL#:
HLR 1575kW Hydronic Boiler Models
Instructions Manual

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
Limited Warranty Information.............................................................4
Important Safety Information..............................................................5
Installation..........................................................................................7
Location..............................................................................................7
Installation..........................................................................................7
Heating Loop Piping...........................................................................8
Safety Relief Valve.............................................................................8
Electrical.............................................................................................8
Operation............................................................................................9
Boiler Startup......................................................................................9
Honeywell Controller T775P2003 Setup............................................9
Honeywell Controller T775P2003 Setting Operating Parameters......9
Boiler Startup......................................................................................9
Boiler Maintenance.............................................................................10
Tightening the Electrical Terminal Connections.................................10
Testing the Safety Relief Valve...........................................................10
Element Inspection, Replacement, and Element Cleaning................11
Testing the Low Water CutOff Device...............................................11
Testing the Safety Relief Valve...........................................................11
Troubleshooting..................................................................................12
Parts Lists...........................................................................................13
Parts List (Continued).........................................................................14
TABLE OF CONTENTS

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
Power Supply
Voltage:
C = 208V
E = 240V
G = 380V
J = 415V
K = 480V
M = 600V
HLR15 ‐ HLR105 HOT WATER BOILERS
4407 Martinsburg Pike Phone: 5406623811
Clear Brook, VA 22624 Fax: 5406658101
USA email: [email protected]
web: www.reimersinc.com
• Maximum design 100psi, 250°F
• Maximum operang, 85psi, 235°F
• All boilers are manufactured in accordance with the requirements of
the A.S.M.E. Boiler and Pressure Vessel Code and A.S.M.E. CSD‐1. Each
boiler bears the Naonal Board Stamp “H”.
• Shell fiberglass insulaon thickness minimum 2".
• Power range 15kW ‐ 105kW with up to 4 heang stages, depending on
model.
• Heang stages managed by digital step controller.
Features
Standard Equipment of Each Boiler Includes:
• A.S.M.E. pressure relief valve.
• One (1) primary high temperature cutoff control with automac reset
and one (1) secondary high temperature cutoff controll with manual
reset.
• One (1) low water cutoff control with manual reset.
• PID‐step controller with number of heang stages depending on the
boiler heang power.
• Digital readout of the operang temperature.
• Magnec contactors.
• Internal branch circuit fusing.
• Main supply power distribuon block.
• Indicator lights for POWER, HEATING, CIRCULATOR PUMP, and
ALARMS.
• Pressure and temperature gauges.
Applications
• Space Heang
• Tank Heang
• Water Source Heat Pumps
• Swimming Pools
Model Number Key
Boiler Power in kW
Safety Relief
Valve Setting:
A = 15psi (1.0 bar)
B = 30psi (2.1 bars)
C = 50psi (3.4 bars)
D = 60psi (4.1 bars)
E = 75 psi (5.2 bars)
F = 100psi (6.9bars)
Power Supply:
1 = 1Phase
3 = 3Phase
Example: HLR75K3B = HLR‐Series hot water boiler, 75kW
heang power, power supply 480V, 3ph, safety valve set to
30psi
* Each boiler model requires two (2) power supplies:
Heang power and control voltage. Nominal control
voltage is 120V AC. Boiler models rated for 380V and
415V are equipped with control voltage
transformers that require 220/240V applied to their
primary side in order to provide the 120V AC control
voltage to the boiler. As an opon, all boiler models
can be equipped with control voltage transformers
so that only the heang power supply needs to be
connected to the boiler.
Please note that all information provided within this brochure is approximate and subject to change without notice.
Please contact Reimers Electra Steam, Inc. with any questions regarding the specifications or dimensions detailed within.
• Bio‐Diesel Reactors
• De‐Icing
H L R

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
Reimers Electra Steam, Inc. warrants the following products of its own manufacture against defects in materials and
workmanship under normal use and service. This warranty is in lieu and excludes all other expressed or implied
warranties or merchantability of fitness for any particular use. No person is authorized to extend the terms of this
warranty or assume any other liability except by written statement signed by an officer of Reimers Electra Steam, Inc.
Clear Brook, Virginia 22624.
The pressure vessel and electrical & mechanical components are warranted for one year from date of shipment from
Reimers Electra Steam, Inc. in Clear Brook, VA 22624.
Products must be installed, used and maintained in accordance with our instructions, including reasonable & necessary
maintenance by the user. Users are responsible for the suitability of the products to their application. There is no
warranty for damage resulting from improper installation, abuse, power failure, fire, flood, lightening, improper water,
misuse, improper specification, misapplication or other operating conditions beyond our control or parts that are normally
expendable in usual course of operation.
Claims against carriers for damage in transit must be filed by the buyer. Reimers liability, if any, will not exceed the price
of Reimers products claimed to be defective.
Components manufactured by any supplier other than Reimers shall bear only that warranty made by the manufacturer of
that product and service for that warranty shall be the responsibility of that manufacturer and not Reimers.
Claims under this Limited Warranty must be made by obtaining a Return Authorization Number from our office (PHONE:
5406623811, FAX: 5406658101) & returning the defective part, freight prepaid to: Reimers Electra Steam, Inc., 4407
Martinsburg Pike, Clear Brook, Virginia 22624
Defective items will be repaired or replaced as necessary within a reasonable time without charge, other than incidental
charges such as freight prepayment. Such repair or replacement within a reasonable time is the exclusive remedy
available from Reimers Electra Steam, Inc., under this Limited Warranty.
Reimers Electra Steam, Inc., is not liable for labor costs incurred in the removal, reinstallation, or unauthorized repair of
product, or for damages of any type whatsoever, including incidental and/or consequential damages.
LIMITED WARRANTY  HOT WATER BOILERS
WARRANTY PERIOD
LIMITATIONS
REMEDY
CONSEQUENTIAL DAMAGES
THIS WARRANTY SUPERSEDES ALL PRESIOUS WARRANTIES

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
You have just purchased a quality steam boiler designed to the ASME Boiler Code and registered with the National Board
of Boiler Inspectors. Treat this industrial equipment with care and respect. It is safe when installed, maintained, and used
properly. Read the instruction carefully and contact the factory if you have any questions.
Read this manual before installing and using this product.
Failure to do so can result in serious injury or death.
Your boiler should be marked with a complete set of WARNING/CAUTION labels shown below. If one of these labels is
missing, please contact our factory immediately.
US and All Other NonFrancophone Countries Canada and All Other Francophone Countries
Located on electrical enclosure door
Located on end caps of cylindrical boiler pressure vessel jacket
Located on end caps of cylindrical boiler pressure vessel jacket
This manual contains safety messages. Each of the safety messages are preceded by one of the following signal word
panels:
Safety messages preceded by this label contain information, that if not followed will result in death or
serious injury.
Safety messages preceded by this label contain information, that if not followed could result in death or
serious injury.
Safety messages preceded by this label contain information, that if not followed could result in minor or
moderate injury.
Messages preceded by this label contain important information, but are not hazardrelated.
Ensure that this manual is available to the boiler operator at any time.
Read this manual before installing and using this product.
Failure to do so can result in serious injury or death.
NOTICE
CAUTION
WARNING
DANGER
WARNING

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
Important Safety Information
1. BLOWDOWN VALVE: This valve is utilized to blow impurities from the boiler chamber. When opened, a large volume
of hot water and steam is discharged. Ensure that this valve is properly piped for such discharge. State and local codes
must be met as applicable.
2. ELECTRICAL: All field wiring to the boiler must be in accordance with the National Electric Code and any local codes
that may apply. Wiring must be made by a competent certified electrician. Use copper wire only.
Ensure that all electrical components are in a dry location, free from any possibility of water soaking. Electric foot
switches when supplied must not be placed on a wet floor. They must be placed on dry surface, not subject to steam or
water.
3. GAUGE GLASS: The gauge glass protector guards must be on at all times. When replacing the glass, be sure that the
unit is not under pressure and is cool to touch. The gauge glass should be replaced once per year. If cracks or wear is
evident, replace the gauge glass immediately.
4. MODIFICATION/MISUSE: This boiler has been designed and constructed in accordance with the ASME Boiler and
Pressure Vessel Code. Any modification or misuse can result in a dangerous situation. Reimers Electra Steam, Inc. is
not liable for any product that has been modified or improperly used.
5. PRESSURE GAUGE: The pressure gauge indicates the internal pressure of the boiler. It can fail. Periodically have
your boiler inspector compare the gauge with a known gauge utilizing the test valve arrangement provided
6. REGISTRATION: Most states and cities require boiler registration and inspection. Check with your government
authorities.
7. INSTALLATION AND REPAIR:
Installation and repair work of this unit must be performed only by experienced personnel. Before commencing a repair,
ensure that the boiler is cold, not pressurized and electrically disconnected. All standard electrical and steam safety
precautions must be taken during testing.
8. SAFETY VALVE: The safety valve is designed to discharge hot steam when the set pressure is exceeded. Ensure
that the discharge port is pointing toward the back of the unit away from the operator or any aisles. Test the safety valve
periodically to ensure that it is operating properly. Test carefully at full pressure by lifting lever using pliers and let it
"slapping" shut. Steam discharge can scald. Ensure no one is exposed.
9. STEAM INSTALLATION: Steam piping must be of black pipe, not galvanized. Work must be done by an experienced
steam fitter. All state and local codes must be met as applicable.
10. WATER: Ensure that all electrical components are in a dry location, free from any possibility of water soaking.
Electric foot switches when supplied must not be placed on a wet floor. They must be placed on dry surface not subject
to steam or water.
WARNING
Read carefully all safety labels attached to the boiler. If any safety label was damaged during shipment, contact the
factory immediately:
Ph. 5406623811; email: sale[email protected]

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
REIMERS ELECTRA STEAM, INC. boilers are heated by one or more immersion type heating elements.
Automatic controls are provided to maintain preset operating pressure and proper water supply. Safety features include
automatic low water cutoff, automatic pressure control, safety valve and visible water level gauge. Each boiler is
manufactured in accordance with the ASME Power Boiler Code Standards and is individually inspected and stamped by
an authorized National Board Insurance Inspector. All boilers are registered with the National Board of Boiler and
Pressure Vessel Inspectors. When boiler is received, make sure it has not been damaged in shipment.
NOTE:
ASME DATA PLATE IS LOCATED ON END OF PRESSURE VESSEL BEHIND LABEL STAMPED WITH NATIONAL
BOARD NUMBER OF UNIT.
When boiler is received, make sure it has not been damaged in shipment.
Place the boiler in a level position, close to the equipment which it is to supply. This will insure minimum heat losses and
allow more economical piping arrangements. All steam lines should be insulated. Review the overall dimensions of your
boiler model on page 6 to select proper boiler location.
Regardless of the NFPA70 working space requirements shown below, provide a minimum of 3ft clearance on both sides
of the boiler for element servicing, 3ft of clearance to the front of the boiler and 1.5ft to the rear of the boiler.
a.) Working space:
Electric boiler spacing is dictated by NFPA70, Table 110.26 as follows:
Note: Where the conditions are as follows:
Condition 1  Exposed live parts on one side of the working space and no live or grounded parts on the other side of the
working space, or exposed live parts on both sides of the working space that are effectively guarded by insulating
materials.
Condition 2  Exposed live parts on one side of the working space and grounded parts on the other side of the working
space. Concrete, brick, or tile walls shall be considered as grounded.
Condition 3  Exposed live parts on both sides of the working space.
(a) DeadFront Assemblies. Working space shall not be required in the back or sides of assemblies, such as deadfront
switchboards or motor control centers, where all connections and all renewable or adjustable parts, such as fuses or
switches, are accessible from
locations other than the back or sides. Where rear access is required to work on non
electrical parts on the back of enclosed equipment, a minimum horizontal working space of
762 mm (30 in.) shall be provided.
b.) Regardless of the above working space required by the National Electrical Cod, the
following clerane side of the boiler must be provided for heating element servicing:
HLR15HLR60 1.5ft (460mm) on right side of boiler
HLR75 1.5ft (460mm) on both sides of boiler
c.) Alcove or closet installation per UL834: Proper location of this boiler model with regard
to combustible and noncombustible surfaces and materials is coded on the boiler name
plate. The following decoding sketch and description is provided for the user information:
Description of dimensions and symbols
A  Clearance above top of boiler
B  Clearance from front of boiler
Prefix C to numeral indicates suitability for closet or alcove installation
Prefix A indicates suitability for alcove but not for closet installation
D  Clearance from back of boiler
EL  Clearance from left side of boiler
ER  Clearance from right side of boiler
F  Indicates type of flooring: "NC" for noncombustible floor / "C" for combustible floor. Numeral indicates minimum
clearance below suspended units to combustible floor
1.1 Location
1. Installation

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
Piping: This hot water boiler is intended to be used in a
closed pressure system with a circulating hot water pump.
The boiler safety relief valve can have settings from 30 and
up to 150psig. The expansion tank must be sized to meet
the ASME standards for the overall water capacity of your
heating system. The circulating system should also include
an air trap and bleed, as well as automatic water fill. The
water inlet and outlet are located on top of the boiler as
shown in FIGURE 1.
Recommended heating loop piping size, depending on the
boiler heating power:
HLR15 – HLR75: 2" NPT
Install stop valves as close as possible to the boiler supply
and return ports (FIGURE 1).
In order to ensure long term troublefree boiler operation,
we recommend that the water used as boiler feed water to
be tested for hardness. If the water in your area is harder
than 1grain (17mg/L), use a water softener. The main
cause for premature heating element failure in electric
steam boilers is water hardness. If severe corrosion during
inspection of the pressure vessel as indicated in chapter
3.4 of this manual becomes evident, additional tests of
your boiler feed water must be performed. A water analysis
should be performed by a qualified and recognized water
treatment company located in your area.
The safety valve is designed to discharge hot steam when
the set pressure is exceeded. Ensure that the discharge
port is pointing toward the back of the unit away from the
operator and any aisles. If it is required that discharge
piping be installed from the safety valve, the pipe should
not be smaller than the valve outlet and should be rigidly
supported so as not to place weight on the valve itself.
Important: No valve in this line!
Install a fused disconnect switch near the boiler. It should
be fused as marked on the boiler name plate. Connect the
power supply from the disconnect switch to the terminals in
the boiler control panel. A copy of the wiring diagram is in
the control panel.
Important: Electrical connections to the boiler control panel
(FIG. 3) should be made by a qualified Electrician. All
wiring must comply with local electrical codes.
All boiler models that are equipped with a transformer
option (OPT1010 or OPT1011) do not require a separate
external control voltage power supply.
1.2 Heating Loop Piping
1.3 Safety Relief Valve
1.4 Electrical
FIGURE 1
Return Line
Supply Line
FIGURE 2
Main Power
FIGURE 3
Control Voltage
ROOM/PROCESS
THERMOSTAT
CONNECTION
Safety Valve

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
a. With all power disconnected, check the control panel for
loose wires caused by vibration in shipping. Review
installation instructions to be sure
boiler is properly wired and installed.
b. Be sure that the boiler drain valve is
closed
c. Fill the system with water
d. Ensure that the selector switch is in
OFFposition (middle position)
e. Turn on the control voltage power
supply
f. Turn the red POWER switch to the ON
position
g. Start the circulating pump, or pumps by throwing the
selector switch of the boiler controller into the PUMP
position. With pump running, bleed air from system and
check entire system for leaks.
h. This hot water boiler is equipped in its standard
configuration with one temperature sensor, placed inside
the boiler pressure vessel near the water outlet nozzle.
It senses the water temperature as it exits the boiler. For
space heating applications that require outdoor reset, a
second sensor can be easily connected to the boiler
controller in the field.
NOTE: For all boilers equipped with the Honeywell
T775P2003 controller (standard configuration), please
continue reading this paragraph. For all boilers equipped
with the BACnetTM enabled controller, model OPTHLR
BMS, please refer to the separate instruction manual that
comes with the boiler.
The Honeywell controller T775P2003 was set at the factory
with its parameters as shown below and to the operating
water temperature as ordered:
1.1 Entering Setup Mode: Press and hold the MENU button
for 5 seconds to display the Setup menu
1.2. Setting up the Sensors:
1.2.1. # of Sensors = 1
1.2.2. Sensor A
1.2.2.1. UNITS = DEG F
1.2.2.2. CALIBRATE = 0.0°F
1.2.2.3. LABEL = BOILER A
> EXIT
2.3. SENSOR B = Not set, unless outdoor reset sensor
connected to controller
1.2.4. SENSOR C: Not used
> EXIT
1.3. Setting up the Outputs
1.3.1. Number of STAGES = 4
1.3.2. SCHEDULE = NO
1.3.3. OPTIONS
1.3.3.1. RESET = NO, unless outdoor reset sensor is
connected to controller
1.3.3.2. INTEGRAL = 0 sec.
1.3.3.3. DERIVATIVE = 0 sec.
1.3.3.4. ON DELAY = 0 sec.
1.3.3.5. OFF DELAY = 0 sec.
1.3.3.6. WWSD = NO
1.3.3.8. LEAD LAG = FOFO
1.3.3.9. DI OPTIONS = DISABLE
1.3.3.10. SHOW RT = NO
> EXIT
1.3.4. Setting up the Stages = Not set
> EXIT
1.4. Setup Alarms = Not set
> EXIT
PROGRAMMING OUTPUT STAGES WITH NO RESET
3.1. Entering Program Mode: Press the MENU button, then
select PROGRAM and press the > button to view the
Program menu.
3.1.1. SETPOINT = Set value to desired heating loop
temperature
3.1.2. THROTTLING RANGE = recommended range 15 –
25°F
3.1.3. SENSOR = Not set
3.1.4. HEAT/COOL = HEAT
> EXIT
> EXIT
To set the boiler controller for reset mode, please refer to
the Honeywell T775P2003 boiler controller manual that is
attached to this manual.
i. Turn the three phase power supply ON
j. Turn the selector switch into the HEATINGposition
a. As soon as the selector switch is in the
HEATINGposition and the Room/Process
thermostat calls for heating:
Both lights remain ON as long
as the Room/Process
thermostat calls for heating.
b. Depending on the difference between
the programmed temperature set point
and the actual temperature in the boiler
pressure vessel, the boiler controller will
start energizing heating stages. The
energized heating stages are indicated in
the controller display as black dots.
c. The actual temperature of the boiler is shown in the
middle portion of the display. To change the
set point, follow the instructions above
(Honeywell Controller T775P2003 Setting
Operating Parameters)
d. Various status messages may be shown
in the lower portion of the boiler controller
display. As long as the thermostat calls for
heating, DI = OFF, when the thermostat does
not call for heating, DI = ON.
e. As soon as the temperature in the
pressure vessel approaches the
programmed set point temperature, the
boiler controller will begin to step out heating
stages.
If the actual temperature in the pressure
vessel (temperature indicated on the
temperature gauge) is higher than the
programmed temperature set point, then the
throttling range must be increased. If the
actual temperature in the pressure vessels
swings too high over the programmed set point, the high
temperature safety limit control(s) may trip.
2. Operation
2.1 Boiler Startup
Honeywell Controller T775P2003 Setup:
Selector
Switch
FIGURE 2
Honeywell Controller T775P2003 Setting Operating
Parameters:
2.2 Boiler Operation, Sequence of Events
FIGURE 5
FIGURE 6
HEATING
light ON
PUMP light
ON

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
2.2.2 Low Water CutOff Function
The low water cutoff function of the boiler control de
energizes the heating elements when the water level in the
boiler pressure vessel falls below the minimum acceptable
operating level. The control senses the water level in the
boiler pressure vessel through a probe. When the tip of the
probe is in contact with water in the boiler, the boiler
operates normally. When the water level in the boiler falls
below the tip of the probe the control senses that water
level is low. The control will not deenergize the heating
elements when the probe loses contact with the boiler
water for short periods of time. But, when the probe loses
contact with the probe for a set time, the control deener
gizes the heating elements and turns on the "LOW
WATER" boiler alarm light. Boiler operation can only be
resumed after determining why water level is low, restoring
normal water level in the boiler and pressing the "LOW
WATER" reset button. After pressing the "LOW WATER"
reset button the alarm light "LOW WATER" turns off, the
lockout is reset and the heating elements are energized.
2.2.3 High Temperature Cutoff Function
As soon as the water temperature in the boiler reaches the
high limit setting, the heaters and the HEATINGlight will
turn off. This may occur when the system is brought up
from cold to fully heated condition. In this case, increase
the throttling range as described above. However, if the
high limit control actuates repeatedly it would indicate that
the water temperature setting is
too close to the hilimit setting.
Check these settings and
increase the difference between
them. Each boiler is equipped
with two high limit temperature
safety limit controls: One
automatic reset control, set to a
lower cutoff temperature and
one manual reset
control, set to a
higher cutoff
temperature. If the
automatic reset control trips, the
HEATING light on the front panel
of the boiler controller turns off
and all heating stages turn off
immediately. If the manual reset
control trips, then the HEATING
light on the front
panel of the boiler
controller turns off,
the HIGH
TEMPERATURE alarm light will
turn on and all heating stages
turn off immediately.
Frequency: During boiler installation, 90days after boiler
installation and then annual
Retighten the terminals of the contactors, fuse blocks and
heating element terminals inside the electrical enclosure
and pressure vessel jacket, following the maximum torque
values listed below:
Component Maximum Torque
50AContactor  25 in*lb
75AContactor  45 in*lb
Fuse Block  45 in*lb
Element Wires to Copper Lugs  20 in*lb
Copper Lugs to Element Terminals  12 in*lb
Frequency: Once every six months
For this test, the boiler temperature should be near the
boiler temperature setpoint and at least one heating stage
energized.
3.2.1 Testing the Automatic Reset Temperature High Limit
Safety Control
 Read the current boiler operating temperature setpoint
 Read and memorize the current setting of the automatic
reset temperature high limit safety control
 Turn the dial of the temperature control towards the boiler
temperature setpoint until all energized heating stages
turn off together.
 Turn the dial of the temperature control to its initial
position. The heating stages should energize staged in
accordance with the programmed ONdelay time in the
Honeywell step controller
3.2.2 Testing the Manual Reset Temperature High Limit
Safety Control
Read the current boiler temperature boiler operating
temperature setpoint
 Read and memorize the current setting of the manual
reset temperature high limit safety control
 Turn the dial of the temperature control towards the boiler
temperature setpoint until all energized heating stages
turn off together. The HIGH TEMPERATURE alarm
indicator light in the boiler controller panel should be ON.
 Turn the dial of the temperature control to its initial
position. Press the red RESET button. The heating
stages should energize staged in accordance with the
programmed ONdelay time in the Honeywell step
controller
3. Boiler Maintenance
FIGURE 7
Manual reset
temperature high
limit control
Automatic reset
temperature high
limit control
FIGURE 8
WARNING
Do not add any chemicals to the
boiler feed water unless
specifically recommended by a
qualified and recognized water
treatment company.
3.1 ReTightening the Electrical Terminal Connections
inside the Electrical Enclosure and Pressure Vessel
Jacket
3.2 Testing the High Temperature CutOff Devices
Bleeder Valve
Low water
cutoff probe

PAGE 11
Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual 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
ONposition and leave the operating mode selector
switch in the middle (OFFposition)
 Observe the LOW WATER alarm light in the boiler
controller front panel. If it turns ON, the low water cutoff
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 CutOff Device Only
Frequency: Any time.
 Press and hold the LOW WATER CUTOFF 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 deactivate the
LOW WATER alarm
3.5.2 Testing the Entire Low Water CutOff System
(Electronic Low water CutOff Device + Low Water probe)
Frequency:
90 days after installation, then once every year
 Flip the boiler operating mode selector
switch to the middle (OFFposition)
 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
ONposition and leave the operating mode selector
switch in the middle (OFFposition)
 Observe the LOW WATER alarm light in the boiler
controller front panel. If it turns ON, the low water cutoff
device works properly.
 Close the boiler drain valve, open the inlet and outlet
valves and with the bleeder valve open, refill the boiler
3.4 Element Inspection, Replacement, and Element
Cleaning
WARNING
Element Rods
3.5 Testing the Low Water CutOff Device
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 10
Boiler Drain
Valve*
Selector
Switch
FIGURE 12
FIGURE 11
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.
FIGURE 9

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
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.
4. Troubleshooting
WARNING
Ensure that the boiler is cold and has no pressure.
Electrical trouble shooting must be performed by a qualified electrician.
If trouble shooting did not resolve problem, please contact our service
technicians at:
Phone: 5406623811
Email: [e-mail]

PAGE 13
Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
5. Parts list for HLR 120180
WARNING
Use Reimers replacement parts. All components are designed and approved to be used in this
Underwriters Laboratories listed and ASME National Board Stamped boiler. Failure to do so may
cause serious injury or death.
1
5.1
2
13
12
5
7
10
8
6
9
55.1
3
11
4
14

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Reimers Electra Steam, Inc. 04/17/2023 HLR 15‐75 Manual REV 1
NOTE: When ordering parts, please give boiler Model and Serial Number and detail shipping instructions.
NOTE 1: When ordering, specify voltage (V) and power (kw) of element.
NOTE 2: When ordering, specify model number of part and boiler serial number.