Electric
™
Mini-Boiler
Installation & Operating
Instructions
EMB-S-1 120-volt, 1-stage – 1.125 kW 3,841 Btu/h
EMB-S-2 120-volt, 1-stage – 2.5 kW 8,535 Btu/h
EMB-S-4 120-volt, 2-stage – 5 kW 17,020 Btu/h
EMB-S-5 240-volt, 1-stage 30A CB 4.5 kW 15,360 Btu/h
EMB-S-7 240-volt, 2-stage 45A CB 7 kW 23,800 Btu/h
EMB-S-9 240-volt, 2-stage 60A CB 9 kW 30,725 Btu/h
Water Flow – Minimum 0.3 GPM per kW water flow is required through boiler.
Design Temperature Rise – Typical radiant floor system should be designed at 12° to 15°.
Application – Low temperature, low pressure, radiant underfloor heating systems. This model includes factory
installed temperature sensing staging.
Comment – If this application is for traditional hydronics heating requiring temperatures greater than 160 and
capacities larger than shown above, contact factory for other Electro-Boiler product series.
In this approximate sizing the EB-M*-** model series is fully modulating and designed for
temperatures up to 180° F. The EB-M* and EB-W* also have outdoor reset options and other features.
Accessories – Attached BL001 lists various accessory or option items which are not part of basic Electro-Boiler.
Note: This product meets the requirements of the ASME Boiler and Pressure
Vessel Code.
Drawings: BX305
BH310
UAW411
BL001
XX017
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TABLE OF CONTENTS
Description
System Components 1
System or Water Flow 1
Temperature Sensing Staging Control 1
Room Thermostat Placement 1
Zone Systems or Requirements 2
Built-In Temperature Control 2
Water Flow Calculation 2
Installation Requirements 3
Electric Supply 3
Clearances 3
Page
Mechanical Installation 4
Electrical Hookup 5
Water Fill Procedure 6
Operational Tips 8
Troubleshooting Helps 9
Drawings: BX305
BH310
UAW411
BL001
XX017
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GENERAL
As stated, this product series applies to under floor hydronics heating. The basic components for an electric
energy heating system typically include:
1. Electric Mini-Boiler itself – covered by this manual.
2. Thermostat hookup control – covered by this manual.
3. Plumbing kit or piping material at the boiler itself – can be ordered as a kit, reference catalog number EMB-PK.
a. These items are shown on plumbing installation drawing BX305.
4. Circulating pump – typically sized for head pressure and system flow requirement, typical catalog number EMB-P2.
5. The under floor circulating tubes and manifolds – provided and manufactured by others, not covered in this manual.
APPROVED TUBING/PIPING
When plumbing this boiler and its peripheral parts to the loop system, all plumbing parts and/or tubing must be
sealed to prevent entrance of oxygen.
Use only tubing or polyethylene tubing with oxygen Diffusion Barrier (ie. PEX).
SYSTEM OR WATER FLOW
In order to prevent rapid stage cycling and long term deterioration of components and elements, it is important
the water flow be greater than the specified 0.3 GPM per kW.
WATER FLOW REQUIREMENTS
Model
EMB-S-1 .75 2.83 .01 .003 .37 1.39 .003 .001
EMB-S-2 1.7 6.43 .01 .006 .85 3.21 .02 .006
EMB-S-4 3.41 12.88 .08 .024 1.70 6.42 .04 .012
EMB-*-5 3.07 11.60 .06 .018 1.53 5.78 .02 .006
EMB-*-7 4.78 18.06 .12 .036 2.39 9.03 .06 .01
EMB-*-9 6.14 23.20 .23 .07 3.07 11.60 .10 .03
* = S or H
Note: Head Loss based on 110° F return temperature.
Flow – 10° F/6° C Head Loss Flow – 20° F/11° C Head Loss
gpm lpm ft m gpm lpm ft m
(MINIMUM 0.3 GPM PER KW WATER FLOW THROUGH BOILER)
Water Temperature Rise
TEMPERATURE SENSING STAGING CONTROL
This model series is factory equipped with a digital supply water sensor and a staging controller. The controller
regulates the elements to maintain a preset maximum or preset operating temperature. The control board has a
front panel screwdriver adjustment (see Operational Tips section) for setting the operating temperature point.
During initial turn on (slab stat call for heat) there is an initial pump on in attempt to stabilize the loop
temperature followed by stage 1. After approximately 4 minutes if the water supply sensor value is still below
the set point, stage 2 is turned on. At this point, the water temperature is sampled every 4 minutes to determine
correct element sequence. Assuming proper flow, the element power will regulate to maintain this preset
temperature.
ROOM THERMOSTAT PLACEMENT
Comfort and proper space heating response is a direct relationship to the room thermostat type and the
placement of the thermostat sensing bulb. Typically an under floor heating system can be broken down into two
categories.
Energy storage, water tubing is under the concrete or within the sand base - The controlling
thermostat must have a remote bulb, and this remote bulb must sense the concrete slab temperature (slab
stat). Coordinated with the concrete pour, install a ¾” PVC, minimum bend radius of 7 inches, and
locate at approximately center (vertical) of the concrete slab. The thermostat sensing bulb can later be
pushed down this PVC conduit. If the slab is already poured without conduit for slab stat, use electronic
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remote sensing thermostat such as Electro Industries’ ES-24-BR. This type of device only requires a
5/16” hole drilled in the concrete at some center wall location.
Quick response, hydronics tubing just under the concrete surface, no flooring material over the
concrete – slab stat is still suggested and preferred, but a standard wall mount room thermostat can be
adequate. Mount room thermostat on an inside wall similar to most heating systems.
Comment: If the slab was poured without the conduit, Electro Industries can provide a remote
sensing slab stat with a remote sensor requiring only a 5/16” hole. If it is at an inside wall, the
5/16” hole need only be 1’ or 2” away from the plate. If it is an outside wall you should go in
about 24”. Simply insert the sensor about 2” and fill with basic silicone to keep the sensor
protected within the hole.
ZONE SYSTEMS OR REQUIREMENTS
If there are zones with capacities and flow less than this boiler’s total capacity, consideration should be given
towards installing a zone controller with the ability to cut off one element for small zones. Low cost multi-zone
interlock, EB-5415A, can provide this function. It also has its own 40VA transformer for powering zone valves.
For two pump zones, EB-Z2P can provide all the pump relay and easy wiring features. Connecting common
and W OUT becomes the interface to turn on this boiler. Unlike the larger Electro-Boiler zone control interface,
no remote bus wires are required, but this EB-Z2P requires 24-volt from the Mini-Boiler internal transformer.
This boiler’s internal pump contact (orange wires) is not used.
TEMPERATURE CONTROL
The hi-limits within this unit are for safety purposes only. The system installation must have a proper
responding slab sensing thermostat or zone controlling device to properly turn the boiler on and off. If the water
flow is greater than the nominal GPM specified, this boiler should not reach hi-limit and the hydronics loop
should continue to flow in the normal heating pattern until the operating slab stat is satisfied. If hi-limiting is
experienced prior to satisfying the operating slab stat, there is probably a water flow issue.
In addition to the built-in supply sensing point and electronic operating temperature control point, there is a 190°
automatic reset hi-limit and a 205° F top vessel manual reset hi-limit.
INFORMATION/WATER FLOW CALCULATIONS
Water flow, GPM, can easily be calculated if the temperature rise across the electric boiler can be measured.
The formula below can only be used when the temperature rise is stable and the boiler is not hi-limiting. In
other words, verify constant current draw and stable outlet temperatures for at least 15 minutes.
GPM=
INFORMATION/WATER FLOW CALCULATIONS – METRIC
L/min =
Volts x Amps x 3.4
500 x Temp. rise 500 x 10 degree rise 5000
Volts x Amps x 3.587
251.04 x Temp. rise ° C 251.04 x 6° C rise 1506.24
Example:
Example:
240 volts x 36 amps x 3.4
240 volts x 36 amps x 3.587
=
=
29376
30991.68
= 5.8 gpm
= 20.57 L/min
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INSTALLATION REQUIREMENTS
1. All installation work must be performed by trained, qualified contractors or technicians. Electro Industries,
Inc., sponsors installation and service schools to assist the installer. Visit our web site at electromn.com
for upcoming service schools.
WARNING
ALL ELECTRICAL WIRING MUST BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND
LOCAL ELECTRIC CODES, ORDINANCES, AND REGULATIONS.
WARNING
OBSERVE ELECTRIC POLARITY AND WIRING COLORS. FAILURE TO OBSERVE COULD CAUSE
ELECTRIC SHOCK AND/OR DAMAGE TO THE EQUIPMENT.
CAUTION
This unit can only be used for its intended design as described in this manual. Any internal wiring changes,
modifications to the circuit board, modifications or bypass of any controls, or installation practices not
according to the details of this manual will void the product warranty, the CSA/us certification label, and
manufacturer product liability. Electro Industries, Inc., cannot be held responsible for field modifications,
incorrect installations, and conditions which may bypass or compromise the built-in safety features and
controls.
2. This installation manual and Electro-Boiler products relate only to the addition of the Electro-Boiler to the
hydronics system. The owner/ installer assumes all responsibility and/or liability associated with any
needed installation of the gas/oil boiler, pump, plumbing, system design, hydronics systems or backup
gas/oil boiler, etc. Any instructions or comments made within this manual (or factory phone assistance)
relating to the gas/oil furnace are provided as comments of assistance and “helps” only.
CAUTION
Hazards or unsafe practices could result in property damage, product damage, severe personal injury and/or
death.
3. Remember, safety is the installer’s responsibility and the installer must know this product well enough to
instruct the end user on its safe use.
Safety is a matter of common sense - - a matter of thinking before acting. Professional installers have
training and experienced practices for handling electrical, sheet metal, and material handling processes. Use
them.
Model Volts Watts Amps CB Phase Btu/h
EMB-S-2 120 2,500 20.8 – 1-60 8,532 1 –
EMB-S-4 120 5,000 41.6 – 1-60 17,065 1 1
EMB-S-5 240 4,500 18.7 30 1-60 15,358 1 –
EMB-S-7 240 7,000 29.1 45 1-60 23,890 1 1
EMB-S-9 240 9,000 37.5 60 1-60 30,717 1 1
MINIMUM CLEARANCE FROM
COMBUSTIBLE SURFACES
BACK 0 INCH 0 MM 0 INCH 0 MM
LEFT 1 INCH 25 MM 6 INCHES 152 MM
RIGHT 1 INCH 25 MM 6 INCHES 152 MM
FRONT 1 INCH 25 MM 24 INCHES 610 MM
TOP 1 INCH 25 MM 24 INCHES 610 MM
BOTTOM REQUIRED CLEARANCE – 18 INCHES/457 MM
ELECTRIC SUPPLY
Element
Stg 1 Stg 2
CLEARANCES
SUGGESTED MINIMUM
SERVICE CLEARANCE
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MECHANICAL INSTALLATION
CAUTION
Electro Industries Inc. requires the use of dielectric isolation between the boiler vessel supply
and return piping when the boiler is plumbed using copper or any other dissimilar metal.
Reference drawing BX305
The plumbing components and piping layout shown on drawing BX305 has been very carefully picked and
should be plumbed as shown. When following this diagram, the water fill procedure becomes very simple and
almost guarantees the removal of all air or prevents air locking problems. Experienced hydronic heating
installers may be able to eliminate components such as regulated fill valve, check valve, temperature gauge, etc.,
but the inclusion of these components guarantees installation and initial operating success.
The key mechanical components required include:
Damage to the vessel caused by galvanic corrosion voids Electro Industries’ warranty.
Boiler/Plumbing Kit Placement – This model series is wall hung and the vessel must be vertical.
The plumbing kit items are located adjacent to the boiler housing itself as shown on
drawing BX305.
For future servicing, the unit itself must be installed a minimum of 18” above the floor. The
elements are screwed in from the bottom.
Allow adequate space for cover removal and maintenance.
Expansion Tank - As a closed loop hydronic heating system, a minimal expansion tank is required.
This can be an air diaphragm tank as provided in the plumbing kit or a basic “empty” tank where air
is compressed at the tank top.
Temperature/Pressure Gauge - Recommended to observe the operation of the system. Actually a
temperature gauge at the inlet and outlet is desirable.
Pressure Safety Valve - This is required at the hot outlet and is furnished as a loose component
with the boiler unit itself. Failure to install the provided, 30 PSI, pressure relief valve as shown
void warranty and the CSA product listing.
Add the necessary pipe extension from the relief valve to the floor to prevent water damage on this unit
or surrounding area.
Gate Valve/Drain Valve - These are for servicing and easy fill purposes.
Circulating Pump - Depending upon system lift and system loop resistance (feet of head), the
proper circulating pump is required to guarantee the minimum GPM flow as specified on the cover
sheet.
Comment: Circulator pump can be in the outlet or inlet. However, the circulator pump should “pump
away from” the expansion tank.
Air Vent – Whenever there is a plumbing point higher than any of the components shown or an
adjacent line (any vertical “U” trap), an air vent valve should be provided.
Building Water Supply Connection – Reference drawing BX305, note 4, some local building
codes require sophisticated check valve or anti-siphon check valve when the hydronics heating
system is permanently connected to the domestic water system. The intent of this connection is
temporary and for fill purposes only. The installer has the responsibility of complying with local
building codes.
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ELECTRICAL HOOKUP
Reference drawing BH310
WARNING
DISCONNECT ALL ELECTRICAL POWER BEFORE ELECTRICALLY CONNECTING OR
SERVICING THE UNIT. FAILURE TO DISCONNECT THE ELECTRICAL POWER BEFORE
WORKING ON THIS PRODUCT CAN CREATE A HAZARD LEADING TO PERSONAL INJURY
OR DEATH.
1. Panel breaker sizes – based upon the installed unit capacity, cover page shows model
number/amps/kW, service from appropriate size panel breaker based on NEC code.
2. Now the larger size EMB-S model series includes a factory provided circuit breaker. This qualifies for
a local disconnect at the product or appliance.
3. 240-Volt Power Source – route and install the proper current carrying conductors, suggested by local
codes, from service panel fuse or circuit breaker. Nameplate shows current & KW rating. Use only
copper wire within this unit enclosure or at the circuit breaker connection.
The source is either from the standard service panel or may be part of an off-peak separately metered
panel/CT metered enclosure. Consult with local utility if questions on off-peak installations.
WARNING
USE ONLY COPPER WIRE FOR CONNECTION TO THE CIRCUIT BREAKER TERMINALS
AND INSIDE THIS PRODUCT’S CABINET.
WARNING
TO AVOID THE RISK OF ELECTRIC SHOCK OR DEATH, WIRING TO THE UNIT MUST BE
PROPERLY GROUNDED. FAILURE TO PROPERLY GROUND THE UNIT CAN RESULT IN A
HAZARD LEADING TO PERSONAL INJURY OR DEATH.
NOTE: This model series is designed and equipped for 240-volt residential single phase. If this unit is
used on 208 volt, energy capacity is reduced and there is a possibility of intermittent relay operation. The
installed transformer has a primary tap for 208.
4. Circulating Pump – the orange pigtail wires, at the control board cube relay, represent a switch closure
(see drawing – 10-amp maximum) to operate the circulating pump motor. Voltage for the pump must
come from a separate source. Wiring entrance must be left KO, do not combine with thermostat cable
or other control wiring.
5. Operating Thermostat – zone valve dry contact end switch is an operating contact, direct wired
thermostats include:
Standard Mechanical – connect to control board “R” and “W”. Important! -Set thermostat
internal heat anticipator to 0.2.
Electro-Stat (ES-24-BR) – 3-wire connection required. This is an electronic remote sensing
device, remote sensor can be up to 25 feet, cut and splice as required. Use only stranded wire,
shielded cable not required. The primary advantages include the capability for longer sensor and
the sensor itself is less than 5/16”. This means it can be installed after the slab is complete by
simply drilling a ¼” hole, 1/8” slot, etc. slightly out from an inside wall.
- R to R, W to W, C to C, green to ground
- Use drawing EH308 (with ES product) for hookup, note change in load control connection.
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Comment: If using zone controller or zone valve type devices, the turn-on or operating thermostat
control function will come from the zone controller W OUT.
6. Load Management Interrupt Control – this Mini-Boiler product has been pre-wired and designed for
a power company load management receiver connection. This should not be altered in any manner!
A. Remove blue pigtail wires, wire-nut.
B. Extend the blue and blue/white wires to the power company load control device.
As shipped, this unit is only equipped for off-peak = N.C. logic. If reversed logic is required,
contact the factory for modification.
Optional – if load management is not used, simply leave the blues wire-nutted as shipped from
manufacturer. Also for Electro-Stat the load control connection is at the Electro-Stat “R” terminal.
Optional – if the power company disconnects 240V for load control, please reference BH029 for
special wiring requirements.
7. Zone Va lve – the installer may elect to totally wire in the zone valves where paralleling the end
switches activate the control board R and W. However, if using EB-5415 or other Electro Industries’
zone controller, wiring is substantially easier and the W OUT goes directly to W input (verify there is a
common on all secondary or auxiliary units). Now this EMB-S Series has a larger 24-volt transformer
which is capable of driving 1 or 2 external zone valves. Again, generally zone controllers have their
own 24-volt transformer making this easier. Suggest adding zone interlock control, EB-5415A.
8. Inspection/final check – Verify all electrical connections are tight (including factory connections),
verify there is proper spacing between all power and electrical wire/terminals, and verify top high limit
manual reset is “in”. During shipping freight vibration there are times when the boiler vessel top
manual reset high limit is “popped out”.
WATER ADDITIVES
1. Unless the source water is unusually poor and/or rust elements, additives are not required. It is
recommended the water source as shown on drawing BX305 comes through the household water softener.
2. Impurities within a closed loop hydronics boiler are considerably less damaging than the typical domestic
water heater. In a closed loop electric boiler, the water impurities “boil out” and the system essentially
reverts to pure water. As a closed system, this “pure water” becomes the operating mode. In the case of
domestic water tank, there is always new water entering with new impurities.
3. However, if additives are required, use the recommendations and source from your local professional
plumber, specializing in hydronics heating systems.
WATER FILL PROCEDURE
The following procedure only applies to the prepackaged plumbing kit and/or when the system is plumbed
exactly as shown on drawing BX305.
1. Connect the temporary household water supply source (probably hose connection) to the "supply water
connection" input.
NOTE: If supply water connection is permanent, some local building codes may require special antisiphon check valve, PRZ check valve, or equivalent between the Mini Boiler fill regulator and the
2. Connect a drain hose to lower hose bib, "drain valve".
3. Open "drain valve" and close "inlet gate valve" (between drain valve and boiler bottom inlet).
4. Verify “top gate valve” is open.
5. Do not apply 24Ø volt heating power during water fill sequence.
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domestic water source or the city water connection.
6. Open "water supply valve" and open household water supply source.
This may be at normal household pressure (4Ø to 6Ø PSI), the auto-fill value regulator keeps
the hydronics loop at its proper low pressure.
7. Allow system to circulate, discharging through drain valve, for at least 1Ø minutes.
8. Put your ear against the metal pipe and listen for air bubbles. If the water flow is consistent and quiet, the
system is probably purged and water filled.
9. Close the "drain valve". Open the "inlet gate valve".
10. The cold system pressure at the gauge should be approximately 1Ø to 14 PSI.
11. Close "water supply valve" and disconnect water supply.
12. Optional – The circulating pump can be energized during this fill operation by having the 240 power main
source breaker off and simply jumpering the 2 screw terminals for the pump wire connection.
Figure 1
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OPERATIONAL TIPS
1. Indicator lights – there is a set of four indicator lights on the front cover. Figure 1 is a reproduction of the
front decal giving definition and information for using these indicator lights.
2. Boiler power LED indicates 24-volt is present on the control board and is continuous on. Off could mean
no 240 power, open manual reset (vessel top), open fuse, or bad transformer. Also indicates supply sensor
condition (solid = good, pulse = faulty).
3. 240-volt element power current flow can only be measured when the external operating thermostat is calling
for heat. There is a 30-second delay before stage 1 turns on, this allows the pump to circulate and sample
temperature. Stage 2 will depend upon the temperature differential at the sensor in the supply pipe, see page
9 sequence (assumes off-peak mode).
4. The operating thermostat heat call can be verified by the red LED marked “Mini-Boiler Heat ON” located
on front cover.
5. Utility off-peak LED is on when the boiler is not being load controlled (blue wires closed).
6. The hi-limit auto reset LED is on when the vessel top hi-limit switch is open.
7. Via a small pin jumper arrangement on the control board, the circulator pump can
be a direct function of the “W” input or interrupted by the load control device (even
though there is a W input). This diagram illustrates this pin jumper arrangement.
This unit is factory setup in the “W” position meaning the pump will always run as
a direct function of “R” to “W” operating thermostat. By simply moving this black
2-position jumper to the “L” the pump will be turned off during load control
interrupt.
8. At outlet temperatures of approximately 120 F (53° C), the maximum system pressure should be
approximately 18 PSI (124 kPa). If the PSI (or kPa) increase from cold water to operating hot water is more
than approximately 3 to 4 PSI (20.6 to 27.5 kPa), the expansion tank is too small.
9. At the top of the vessel is a manual reset, 205° F (96° C), primary hi-limit. This is behind the upper control
board cover, at the top of the vessel. At the end of the two red/blk wires there is a small red stem between
the wire tabs. This is the reset button.
10. Check for water leaks and repair as required.
11. If flow seems to be a concern, determine both inlet and outlet water temperature and apply GPM (L/min)
formula detailed in previous section “Information/Water Flow Calculations”.
AQUASTAT OPERATION
Determine from floor tubing supplier design outline the desired floor temperature. Typically this relates to
floor covering and tube placement design. Set the aquastat set point for desired warm water outlet.
The front temperature set point is selected by a small screwdriver dial switch. Use the following chart:
Switch Position Set Point
0 90
1 100
2 110
3 120
4 130
5 140
6 150
7 160
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TROUBLESHOOTING HELPS
Inside monitor – there are two red LED’s on the inside labeled “STG1” and “STG2”. Each LED is an
indication of stages of boiler on/off.
Located near the thermostat connection is a red LED labeled “MANUAL-HL-OK”. This LED represents the
205° manual reset. If on, manual hi-limit is closed. If off, manual hi-limit is open.
Sequence – depending upon temperature difference between actual measured water temperature, desired
temperature (set point), and system flow, second stage may be delayed turning on for periods of four minutes or
greater.
Mechanical hi-limit, top vessel screw-in, automatic reset – this is at about 190° F, opens the red/white wire
loop. This can be monitored by the “Auto Reset” front indicator light. As the water cools to approximately
150° it should self reset and restart.
Manual reset limits – surfaced mounted to the top of the vessel, opens at 205° F. This opens all 24V control
power thus opening all element power relays. The observed action is the same as a blown fuse, no front panel
boiler power LED.
To reset this device, simple press the red button.
Comment: The hi-limit auto reset LED and utility off-peak LED are only on during an active heat call
(lower red LED on).
WARMFLO® TEMPERATURE BYPASS TROUBLESHOOTING OR TESTING
Adding a jumper between “W” screw terminal and tab marked “E” bypasses the temperature sensing and
WarmFlo control. In other words, with the jumper installed, a “W” input represents both stages, full on.
Flow Switch Statement
A flow switch is not included with the boiler. However, one can be added to the LMC circuit. Simply place the
field provided flow switch in series with this circuit.
AVAILABLE, ELECTRO INDUSTRIES, INSTALL PARTS OR KITS
Note: Basic 24V power must be present for the E-tab function to work.
NOTE: The “L/W” (J3) jumper must be in the “W” position.
EMB-BK MINI-BOILER PLUMBING KIT BASIC
EMB-PK MINI-BOILER INSTALL KIT PREFERRED
EMB-P2 PUMP KIT 1/25HP BOILER
ES-24-BR STAT DIG SLAB/ROOM/ROOM 24VAC
WFS2 TEMPERATURE WATER SENSOR
EB-5415A ZONE CONTROLLER
EMBS5636 REPLACEMENT CONTROL BOARD
5127 ELEMENT RELAY
5541 TRANSFORMER, 24V/40VA
5576 AIR ELIMINATOR 3/4" ROLLAIRTROL
5456A GAUGE PRES/TEMP 75 PSI/320DG F .25"
5453 VALVE RELIEF 30 PSIG .75” NPT MALE
5590 EXPANSION TAN K 40K BTU 20.1 GALLON
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BOILER ACCESSORIES
BOILER ACCESSORIES
ZONE CONTROLLER
This will simplify your wiring and make zoning applications much easier. In addition, enhanced communicating
features have the ability to stage the electric boiler based upon the connected zone capacity.
Standard Features
• Utility load control
• Terminal block wiring, visual
wiring layout
• Indicator lights showing zone
operation
• 24-volt, 40VA transformer
120/208/240 connection
• Fuse protection
• Priority option
• Dual temperature operation
• Applies to digital or
standard thermostats
• Dial switch, select each zone
capacity
SWITCHING RELAY - EE-5051 MULTI-BOILER - EB-C-STG5
Pumps, Actuators, Valves
EB-ZTA-1 - install within boiler cabinet
EB-ZEA-1 - with enclosure and 40VA
transformer
EB-ZEA-2 - add additional 4, enclosure and
40VA transformer
Pumps
EB-ZEA8 - with enclosure and 40VA
transformer for 8 zone pumps
Zone Valves
EB-ZTS-1 - install within boiler cabinet, encl.
option
EB-ZTS-2 - add additional 4, enclosure and
40VA transformer
EB-ZES8 - with enclosure, no transformer, for
8 zone valves
This DPDT 24-volt switching relay provides a
convenient solution to any AC or DC application.
OTHER OPTIONS
• Ideal for zone pumps
• 24V coil
• 120V, 10A, contact sets
• Easy to wire and nicely
packaged
Electrically connects between 2nd and 3rd, 3rd and 4th, etc.
SOT-1 Switchover to standby, total run time
5701 Single feed bus for 2 CB’s (SQ-D CB)
5702 Single feed bus for 3 CB’s (SQ-D CB)
EB-S-SB Dual boiler option for EB-S Series
WF-ANZ7 WarmFlo Analyzer, now applicable to WO and
WA Series
Monticello, Minnesota
800.922.4138
www.electromn.com
TWO SUPPLY WATER TEMPERATURE REQUIREMENT
• Handled as the priority zone on multi-zone (EB-ZEA-1)
• Priority switch on, zone 1 active - TS boiler automatically changes
to 150° (or selection 176°) supply water setting
• All other zones are held off
• With zone 1 satisfi ed or 60-minute timeout, the boiler automatically
returns to the preset temperature and reacts to the other zones
Low T emp High T emp
Radiant, slab Radiant, staple up
Radiant, slab Baseboard
Radiant, slab Fan coil
Radiant, slab Water heater, side arm
Radiant, slab Hanging unit heater (garage, shop, etc.)
INSTALLATION PLUMBING KITS
These installation kits provide the critical plumbing components needed for easy installation of the Electro-Boiler. In addition to the
items shown in the matrix below, each kit includes all necessary ball valves, drain valve, tees, elbows, nipples, bushings, cou plings,
etc. for direct connection to circulator pump and/or manifold.
Electro Industries’ boilers come standard equipped with outlet temperature/pressure gauge, pressure relief safety valve, and when
applicable, the WarmFloTM electronic control sensors. These kits provide the additional components for easy installation:
Model Application Return Gauge Expansion Tank Air Vent
EMB-BK All EMB Series 2.1 gal. (7.9 L), 40,000 Btu/h Basic fl oat type
EMB-PK All EMB Series
EB-PK-M EB-MS, -MA, -MO Series
EB-BK-TS EB-S, -WA, -WO Series 4.5 gal. (17 L), 135,000 Btu/h Basic fl oat type
EB-PK-TS EB-S, -WA, -WO Series
2.1 gal. (7.9 L), 40,000 Btu/h Enhanced air separator, EAS
4.5 gal. (17 L), 135,000 Btu/h Enhanced air separator, EAS
4.5 gal. (17 L), 135,000 Btu/h Enhanced air separator, EAS
CIRCULATING PUMPS
5585 - Mini-Boiler &
10 kW TS Series
•
120V, 1/25 HP, maintenance-free wet
rotor circulator
• Pump curve example - 5 GPM (19 L)
@ 11 ft. of head (32.9 kPa)
Specifi cations subject to change without notice, all rights reserved.
5586 - TS Series, Standard 5578 - 3/4” Pipe
• 120V, 1/6 HP, maintenance-free oil
lubricated circulator
• Pump curve example - 10 GPM (37.8 L)
@ 20 ft. of head (50.8 kPa)
5582 - 1” Pipe
5579 - 1-1/4” Pipe
• Two fl anges, with isolation valve
03/14/2018 BL001
Electro Industries, Inc. Residential
Limited Product Warranty
Effective November 1, 2009
Electro Industries, Inc. warrants to the original owner, at the original installation site, for a period of two (2)
years from date of original purchase, that the product and product parts manufactured by Electro
Industries, Inc. are free from manufacturing defects in materials and workmanship, when used under
normal conditions and when such product has not been modified or changed in any manner after leaving
the plant of Electro Industries, Inc. If any product or product parts manufactured by Electro Industries,
Inc. are found to have manufacturing defects in materials or workmanship, such will be repaired or
replaced by Electro Industries, Inc. Electro Industries, Inc., shall have the opportunity to directly, or
through its authorized representative, examine and inspect the alleged defective product or product parts.
Electro Industries, Inc. may request that the materials be returned to Electro Industries, Inc. at owner’s
expense for factory inspection. The determination as to whether product or product parts shall be
repaired, or in the alternative, replaced, shall be made by Electro Industries, Inc. or its authorized
representative.
Electro Industries, Inc. will cover labor costs according to the Repair / Replacement Labor Allowance
Schedule for a period of ninety (90) days from the date of original purchase, to the original owner, at the
original installation site. The Repair / Replacement Labor Allowance is designed to reduce the cost of
repairs. This Repair / Replacement Labor Allowance may not cover the entire labor fee charged by your
dealer / contractor.
TWENTY YEAR (20) LIMITED WARRANTY ON BOILER ELEMENTS AND VESSELS
Electro Industries, Inc. warrants that the boiler elements and vessels of its products are free from defects
in materials and workmanship through the twentieth year following date of original purchase. If any boiler
elements or vessels are found to have a manufacturing defect in materials or workmanship, Electro
Industries, Inc. will replace them.
TWENTY YEAR (20) LIMITED WARRANTY ON SPIN FIN ELEMENTS
Electro Industries, Inc. warrants that the spin fin elements of its products are free from defects in materials
and workmanship through the twentieth year following date of original purchase. If any spin fin elements
are found to have a manufacturing defect in materials or workmanship, Electro Industries, Inc. will replace
them.
FIVE YEAR (5) LIMITED WARRANTY ON OPEN WIRE ELEMENTS
Electro Industries, Inc. warrants that the open wire elements of its products are free from defects in
materials and workmanship through the fifth year following date of original purchase. If any open wire
elements are found to have a manufacturing defect in materials or workmanship, Electro Industries, Inc.
will replace them.
Page 1 of 2 XX017
THESE WARRANTIES DO NOT COVER:
1. Costs for labor for removal and reinstallation of an alleged defective product or product parts,
transportation to Electro Industries, and any other materials necessary to perform the exchange,
except as stated in this warranty. Replacement material will be invoiced to the distributor in the usual
manner and will be subject to adjustment upon verification of defect.
2. Any product that has been damaged as a result of being improperly serviced or operated, including,
but not limited to, the following: operated with insufficient water or airflow, allowed to freeze,
subjected to flood conditions, subjected to improper voltages or power supplies, operated with airflow
or water conditions and/or fuels or additives which cause unusual deposits or corrosion in or on the
product, chemical or galvanic erosion, improper maintenance or subject to any other abuse or
negligence.
3. Any product that has been damaged as a result of natural disasters, including, but not limited to, the
following: lightning, fire, earthquake, hurricanes, tornadoes or floods.
4. Any product that has been damaged as a result of shipment or handling by the freight carrier. It is the
receiver’s responsibility to claim and process freight damage with the carrier.
5. Any product that has been defaced, abused, or suffered unusual wear and tear as determined by
Electro Industries or its authorized representative.
6. Workmanship of any installer of the product. This warranty does not assume any liability of any
nature for unsatisfactory performance caused by improper installation.
7. Transportation charges for any replacement part or component, service calls, normal maintenance;
replacement of fuses, filters, refrigerant, etc.
CONDITIONS AND LIMITATIONS:
1. If at the time of a request for service the original owner cannot provide an original sales receipt or a
warranty card registration then the warranty period for the product will have deemed to begin thirty
(30) days after the date of manufacture and NOT the date of installation.
2. The product must have been sold and installed by a licensed electrical contractor, a licensed
plumbing contractor, or a licensed heating contractor.
3. The application and installation of the product must be in compliance with Electro Industries’
specifications as stated in the installation and instruction manual, and all state and federal codes and
statutes. If not, the warranty will be null and void.
4. The purchaser shall have maintained the product in accordance with the manual that accompanies
the unit. Annually, a qualified and licensed contractor must inspect the product to assure it is in
proper working condition.
5. All related heating components must be maintained in good operating condition.
6. All lines must be checked to confirm that all condensation drains properly from the unit.
7. Replacement of a product or product part under this limited warranty does not extend the warranty
term or period.
8. Replacement product parts are warranted to be free from defects in material and workmanship for
ninety (90) days from the date of installation. All exclusions, conditions, and limitations expressed in
this warranty apply.
9. Before warranty claims will be honored, Electro Industries shall have the opportunity to directly, or
through its authorized representative, examine and inspect the alleged defective product or product
parts. Remedies under this warranty are limited to repairing or replacing alleged defective product or
product parts. The decision whether to repair or, in the alternative replace, products or product parts
shall be made by Electro Industries or its authorized representative.
THESE WARRANTIES DO NOT EXTEND TO ANYONE EXCEPT THE ORIGINAL PURCHASER AT RETAIL AND ONLY WHEN THE PRODUCT IS IN THE ORIGINAL
INSTALLATION SITE. THE REMEDIES SET FORTH HEREIN ARE EXCLUSIVE.
ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED WITH
RESPECT TO ALL PURCHASERS OR OWNERS. ELECTRO INDUSTRIES, INC. IS NOT BOUND BY PROMISES MADE BY OTHERS BEYOND THE TERMS OF THESE
WARRANTIES. FAILURE TO RETURN THE WARRANTY CARD SHALL HAVE NO EFFECT ON THE DISCLAIMER OF THESE IMPLIED WARRANTIES.
ALL EXPRESS WARRANTIES SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS LIMITED WARRANTIES SET FORTH HEREIN AND EXCLUDE ANY
LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES RESULTING FROM THE BREACH THEREOF. SOME STATES DO NOT ALLOW THE EXCLUSION OR
LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY. PRODUCTS OR PARTS OF
OTHER MANUFACTURERS ATTACHED ARE SPECIFICALLY EXCLUDED FROM THE WARRANTY.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY HAVE OTHER RIGHTS WHICH VARY UNDER THE LAWS OF EACH STATE. IF ANY
PROVISION OF THIS WARRANTY IS PROHIBITED OR INVALID UNDER APPLICABLE STATE LAW, THAT PROVISION SHALL BE INEFFECTIVE TO THE EXTENT OF
THE PROHIBITION OR INVALIDITY WITHOUT INVALIDATING THE REMAINDER OF THE AFFECTED PROVISION OR THE OTHER PROVISIONS OF THIS WARRANTY.
Page 2 of 2 XX017
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