Reimers RHP-120 User manual

PAGE 1
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
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#:
RHP RHPH and RHPHC120300 Steam Boiler
Models
Instructions Manual

PAGE 2
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
Limited Warranty Information.............................................................4
Important Safety Information..............................................................5
Installation..........................................................................................7
Location..............................................................................................7
Water Supply......................................................................................8
Steam Outlet......................................................................................8
Condensate........................................................................................8
Safety Relief Valve.............................................................................8
Electrical.............................................................................................8
Operation............................................................................................9
Boiler Startup......................................................................................9
Blowdown Valve.................................................................................9
Control Functions...............................................................................10
Boiler Monitor.....................................................................................10
Boiler Maintenance.............................................................................10
Boiler Blowoff.....................................................................................10
Safety Valve Test................................................................................11
Element Replacement and Element Cleaning...................................11
Water Level Probe and External Water Column Cleaning.................11
Gauge Glass Replacement................................................................11
Troubleshooting..................................................................................13
Parts Lists...........................................................................................14
Parts List (Continued).........................................................................15
Instruction Supplement 1....................................................................16
TABLE OF CONTENTS

PAGE 3
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
RHP120 ‐ RHP300 STEAM 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 safety valve seng 150psi
• 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 “S”.
• High quality saturated steam, operang pressure range 0 – 135psig
• Heavy duty carbon steel pressure vessel. Vessel jacket and electrical enclosure
made from painted carbon steel
• Large selecon of oponal equipment
Features
Standard Equipment of Each Boiler Includes:
• A.S.M.E. pressure relief valve
• Two (2) boiler boom blowoff valves (one quick‐opening and one slow
opening) as per A.S.M.E. Code B31.1
• High pressure feed pump in RHPH‐ and RHPHC‐models
• One (1) primary high pressure cutoff control with automac reset and one (1)
secondary high pressure
cutoff control with manual reset
• One (1) primary low water cutoff control with automac reset and one (1)
secondary low water cutoff with manual reset
• PID‐step controller with number of heang stages depending on boiler model
• Digital readout of the operang pressure
• Magnec contactors
• Internal branch circuit fusing
• Main supply power distribuon block
• Indicator lights for POWER, REFILLING, HEATING, ALARMS and Automac
Boiler Blowoff Status
• Pressure and water level gauge
Applications
• Process Steam
• Industrial Autoclaves • Air Humidificaon
• Dry Cleaning • Food Service
• Laboratories
• Automove Industry
Model Number Key
Feed Water Opons:
Blank = Solenoid Valve
H = Solenoid Valve + Pump
Condensate Tank:
Blank = No Condensate Tank
C = Boiler with Condensate
Boiler Power in kW
Safety Relief
Valve Seng:
A = 15psi (1.03bars)
H = 150psi (10.3bars)
Power Supply:
3 = 3‐Phase
Power Supply
Voltage:
E = 240V
G = 380V
J = 415V
K = 480V
M = 600V
Example: RHPHC300K3H = RHPSeries boiler with pump and condensate tank,
360kW heating power, power supply 480V, 3ph, safety valve set to 150psi.
(1) Each boiler model requires two (2) power
supplies: Primary heang power and secondary
control voltage. Nominal control voltage is 120V,
50/60Hz. 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.
(2) On boiler equipped with condensate tank, add
180lbs (82kg)
(3) The STEAM CAPACITY listed above is based on
the evaporaon rate from and at 212°F, at 0psig. If
the boiler feed water temperature is 50°F, then
the STEAM CAPACITY for each model listed above
is approximately 15% lower.
Please note that all informaon provided within this brochure is approximate and subject to change without noce.
Please contact Reimers Electra Steam, Inc. with any quesons regarding the specificaons or dimensions detailed within.
H PR

PAGE 4
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
LIMITED WARRANTY – STEAM GENERATORS
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.
WARRANTY PERIOD
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.
LIMITATIONS
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.
REMEDY
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.
CONSEQUENTIAL DAMAGES
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.
THIS WARRANTY SUPERSEDES ALL PREVIOUS WARRANTIES.

PAGE 5
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
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

PAGE 6
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
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 “slap” 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.
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: [e-mail]

PAGE 7
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
1. Installation
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 BOILER SADDLE AND/OR END OF PRESSURE VESSEL BEHIND LABEL STAMPED
WITH NATIONAL BOARD NUMBER OF UNIT.
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.
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.) 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

PAGE 8
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
On models with pump and/or solenoid valve, connect
incoming water supply to strainer on intake side of solenoid
valve.
On models furnished with condensate return tank, connect
water line to makeup valve located at tank end. (See
Instruction Supplement 1 in this manual) R, RH and RHC
steam boiler models require four (4) gallons of feed water
per hour for each 10 kW of electric heating capacity of the
boiler. Lines should be of adequate size and meet local
plumbing codes.
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.
Recommended levels for boiler feed water:
Recommended levels for boiler water (water inside
pressure vessel when boiler is operating)
All piping from and to the boiler must comply with the
A.S.M.E. B31.1 Power Piping Code. All State and local
codes must be met. All piping must be done by a qualified
steam fitter.
Connect steam line of sufficient size from steam line valve
to the equipment. Steam piping must be black steel pipe,
not galvanized. Work must be done by an experienced
steamfitter. All state and local codes must be met.
If the condensate is to be returned by gravity (no tank) in a
closed system, the load discharge should be at least 2 feet
above the boiler level so that the weight of the condensate
will actuate the check valve. When applicable, install steam
return lines at sufficient height to allow a pitch of 2 inches
for every 10 feet of pipe length.
Note: For condensate return systems (with tank), see
special sheet.
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.
Follow local codes. 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
(below) should be made by a qualified Electrician. All wiring
must comply with local electrical codes.
Boiler models that are equipped with a transformer option
(OPT1010 or OPT1011) do not require a separate external
control voltage power supply.
NOTICE Do not add any chemicals to
the boiler feed water unless
specifically recommended by a
qualified and recognized water
treatment company.
Boiler Feed
Water Supply
Safety Relief
Valve
CONTROL
VOLTAGE
1.2 Water Supply 1.3 Steam Outlet
1.4 Condensate Return
1.5 Safety Relief Valve
1.6 Electrical
Steam Outlet
Valve
POWER

PAGE 9
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
When the blowdown valve is utilized, a large volume of hot
water and steam is discharged. Ensure that this valve is
properly piped for this discharge. State and local codes
must be met as applicable.
a. Open steam line valve slightly. This will allow the boiler
to be filled without producing back pressure.
b. Open upper and lower gauge glass fixture valve
c. Ensure that the feed water shutoff valve is in the OPEN
position
d. Close the boiler blowdown valve
e. Throw the fused disconnect switch (not provided by
factory) to the ONposition and turn on the boiler control
voltage
f. After approximately 2 seconds, the WATER FEED light
turns on and water enters the boiler. As soon as the water
level reaches approximately half height in the gauge glass,
the automatic water feed turns off.
g. If the boiler controller indicates any alarms, then press
the corresponding RESET button(s).
As soon as no boiler alarms are indicated, the HEATING
light turns on and the boiler starts to build up pressure.
Observe the pressure gauge while pressure builds up, until
working pressure is reached. The working pressure should
have been factory set to your specification. However, if you
wish to change the working pressure setting, proceed as
follows.
All pressure controls are factory preset and require no
adjustment. However, if a change of the operating steam
pressure is required, then proceed as
follows:
•Press the <MENU> key on the PIDController for about
one second
•Select PROGRAM
•Select MOD1
•With the UP and DOWN keys, set new boiler working
pressure. Do not set the boiler working pressure too close
to the settings of the pressure high limit controls S1 and
S2, otherwise they may trip.
h.) To shut off the boiler, turn the POWER switch on the
boiler controller OFF.
Do not let the pump to run dry for an
extended time as this will cause
damage to the pump.
Stand clear of scalding water or steam.
Disconnect the boiler from all power
supplies.
2. Operation
2.1 Boiler Startup
1.7 Blowdown Valve
CAUTION
GAUGE
GLASS
VALVES
BLOWDOWN
VALVE
Turn the BLOWDOWN
ENABLE switch OFF
Turn the POWER
switch ON
NOTICE
WARNING
S1: Pressure High Limit
Control Manual Reset
DO NOT ADJUST!
S2: Pressure
High Limit Control
Automatic Reset Pressure Gauge
FEED WATER
SHUTOFF VALVE

PAGE 10
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
The control provides four basic functions and two optional
functions. The following overview describes the functions.
Low water cutoff
High pressure cutoff
Automatic boiler refill
Automatic boiler blowoff (Optional)
The Honeywell controller T775P2003 was set at the factory
with its parameters as shown below and to the operating
steam pressure as ordered:
•Press & hold the MENU button for 5 seconds to display
the Setup Menu
•# of Sensors = 1
•Sensor A
•TYPE = 420 MA
•UNITS = PSI
•MIN VALUE = 0
•MAX VALUE = 150 (Same as Transducer)
•CALIBRATE = 0.0
•LABEL = BOILER A
•OUTPUTS
•MOD 1
•TYPE = 010V
•MIN OUT = 0
•INTEGRAL = 0
•DERIVATIVE = 0
•HIDE = NO
•Skip MOD 2, #RELAYS, OPTIONS RELAY 1, RELAY 2
•EXIT
•MENU (Press Once)
•PROGRAM ►
•MOD 1 ►
•SETPOINT = ? 150
•THROT. RANGE = 5 (Might Change) 2 PER STEP
•ACTION HEAT
Skip MOD 2, RELAY 1, RELAY 2
2.2.1 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 type control as
primary low water cutoff function with automatic reset & a
secondarey low water cutoff probe, "Probe 3". 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
energizes 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 [R]. After presseing the “LOW
WATER” reset button the alarm light “LOW WATER” turns
off, the lockout is reset and the heating elements are
energized.
2.2.2 High Pressure Cutoff Function
If the operating pressure control fails, the steam pressure
in the boiler can reach the value set on the high limit
pressure control. In that case, the high limit pressure
control deenergizes the heating elements and locks them
out. The boiler alarm light “HIGH PRESSURE” comes on.
Reduce the boiler pressure to a point below the normal
operating pressure and press the high pressure reset
button [R]. Heating elements should turn on. If pressure
rises above the set operating pressure then check the
pressure transducer.
2.2.3 Automatic Boiler Refill
The probe type boiler control provides automatic boiler refill
and primary low water cutoff function with automatic reset.
When the water level drops below the water level probe,
the boiler controller energizes the feed water pump/
solenoid valve. When water comes back into contact with
the water level probe the controller turns off the feed water
pump/solenoid valve after a preset time delay. If the water
does not reach normal level within a preset time, the
controller deenergizes the feed water valve/pump and
displays a flashing “0” on the LED display. Pressing the “E”
key will start another feed water cycle.
The ON and OFF delay time can be adjusted. See the
boiler control manual for instructions.
The following are definitions for all boiler monitor
indications.
Flashing “0”: Boiler feed pump and/or solenoid remained
energized longer than the set time. Boiler feed pump and/
or solenoid are deenergized. Press “E” key to reset alarm
and start a new refilling cycle.
Flashing “1”: Following a blowdown cycle, the automatic re
fill device did not stay on for the set time. Press”E” key to
reset the alarm.
Flashing "2": Boiler is flooded. Heating and water feed are
disabled. Lower water level to resumer operation.
WARNING 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 shutoff.
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 makeup 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
Rseries steam boilers is to install a Reimers Electra
Steam, Inc. properly sized and fully trimmed blowdown
tank, model BTANK16. 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.
2.2 Control Functions
2.3 Boiler Monitor Definitions
3. Boiler Maintenance
3.1 Boiler Blowoff

PAGE 11
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
3.1.1 Boiler Blowoff Frequency
Perform a blowdown of the boiler daily and allow the boiler
to refill. Never leave a boiler sit empty.
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 2.1. 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 round endcaps from the ends 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 external water
columns, piped on the rear exterior of the boiler. The water
columns have connection to the top and side 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 columns must be cleaned every six (6) months
of sediments and other debris that accumulates at the
bottom of the column. To accomplish this, proceed as
follows:
Step 1:
Remove the pipe plugs from the external water column
piping
Step 2:
Insert a rotary cleaner, wire brush, or similar tool into the
upper and lower horizontal portions of the external column
piping and remove deposits.
Step 3:
After cleaning, reinstall the pipe plugs. Use proper pipe
thread sealing material.
Step 4:
Remove the water level probe cover, disconnect the wire
from the probe. Remove 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 column and
connect the wire back to the probe.
Repeat this procedure every 6 months. Pipe the external
water column drain valve to a safe point of discharge.
Open this valve for approximately 5 seconds every 3 days
to remove sediments from the horizontal portion of the
lower external water column piping.
Ensure that the boiler is cold,
drained and all power supplies are
disconnected.
3.3 Safety Valve Test
3.4 Element Replacement and Element Cleaning
WARNING
Element Rods
WARNING
3.5 Water Level Probe and External Water Column
Piping
3.6 Gauge Glass Replacement
Close gauge
glass valves
(Top and Bottom)
Remove gauge
glass protector &
rods
Step 1 Step 2
WARNING
WARNING
Probe Covers
Pipe Plugs
Water Column Drain Valves
Pipe Plugs

PAGE 12
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
Install new glass by
performing the
above procedure in
reverse order.
Always install new
rubber washers.
Step 6
Open drain valve
on bottom fixture
to drain glass
Step 3 Step 4
Loosen nuts at
top and bottom of
glass
Slide glass up,
pull out on
bottom of glass
and remove
Step 5

PAGE 13
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
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 14
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
5. Parts list for RHP, RHPH and RHPHC Boiler Models (RHPSeries)
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.
3
14
15
13
9
16 18
4
20
8
10
17
21
12
5
7
7
6
11
19
11
9 6
1

PAGE 15
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
NOTE: When ordering parts, provide boiler model, 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.

PAGE 16
Reimers Electra Steam, Inc. 3/30/2023 RHP 120‐300 Manual REV 4
I1. Installation
Step 1: Connect water supply to water intake on tank (1). If
the city water line pressure exceeds 40psi, install a
pressure reducing valve.
Step 2: Connect the condensate return line from the
equipment to the condensate return intake (2). Pipe from
the vent (3) is to be installed to outside of the building, if
desired. If this method is used, the pipe should be the
same size as the vent opening.
Step 3: Install piping from the overflow (4) to a drain.
I2. Startup
Step 1: Turn all boiler power supplies on.
Step 2: Open the water supply valve to begin filling the
condensate tank with water. Observe the water level in the
tank gauge glass. When the float valve inside the tank
closes, the water level should be still visible in the upper
portion of the gauge glass.
Step 3: Open the boiler steam outlet valve (9).
Step 4: Ensure that the feed water shutoff valve (5) and the
condensate pump supply valve (6) are in the open position.
Step 5: Flip the POWERswitch (not shown) to the ON
position. The pump should turn on.
Step 6: Open the pump primer valve (8) slightly and wait
until water discharges. Close this valve.
Step 7: Wait until the pump stops. After the pump has
stopped, the water level in the boiler gauge glass should
be at approximately half height of the glass.
Step 8: Close the steam outlet valve (9) and wait until the
boiler builds up pressure to its preset value.
Step 9: Open slowly the steam outlet valve (9) to supply
steam to the process.
I3. Maintenance
a. Strainer – The strainer (10) should be removed and
cleaned shortly after boiler has been in operation to clear
away sediment, which may have accumulated during start
up. This strainer should be periodically inspected and
cleaned when necessary.
b. Gauge Glass  See Boiler Instructions.
c. Pump Motor  Maintenance is normally not required on
the pump or motor (11).
I4. Condensate Return System Parts List
Part# Description
05592 Gauge Glass 5/8" X 5.75"
02001 Gauge Glass Fixture Set
05846 Strainer 1"
*Part number for pump depends on boiler model*
Instruction Supplement 1
Condensate Return System
Water supply should be turned off
when the boiler is not in operation.
WARNING
Under no condition should the vent be
plugged.
WARNING
9
6
5
11
10
23
1
4
9
6
5
11
10
2
3
1
4
Horizontal Condensate Return Tank:
Vertical Condensate Return Tank: