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Electric
™
Mini-Boiler
Installation & Operating Instructions
Application: This Electro Mini-Boiler is factory equipped
with outlet temperature sensing control designed to deliver
the exact water temperature for your application. This model
is equipped with pump/valve outputs, backup gas boiler
output, auto and manual high limit safety interlocks, power
company load management, and up to three temperature
sensors depending on the model.
Primary application is any hydronic water heating system (high or low temperature systems).
This series is equipped for power company load management interrupt and can apply to standard baseboard
radiation, dual heat combinations, under floor radiant, wood boiler supplement, etc.
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.
Conforms to: UL STD.UL834
Certified to: CSA STD.C22.2#165
DO NOT DESTROY THIS MANUAL. PLEASE READ CAREFULLY AND KEEP IN A SAFE
PLACE FOR FUTURE REFERENCE BY A SERVICE TECHNICIAN.
12/28/2023
BI312
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Summary of Contents for Electro Industries Mini-Boiler EMB-R1-01-120-1
- Page 1 Electric ™ Mini-Boiler Installation & Operating Instructions Application: This Electro Mini-Boiler is factory equipped with outlet temperature sensing control designed to deliver the exact water temperature for your application. This model is equipped with pump/valve outputs, backup gas boiler output, auto and manual high limit safety interlocks, power company load management, and up to three temperature sensors depending on the model.
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Page 2: Table Of Contents
TABLE OF CONTENTS Description Page System Components Mini-Boiler Selection Guide Electrical Specifications Water Flow Requirements Multiple Zones & Radiant Temperatures Safety Temperature Control Room Thermostat Placement Water Flow Calculation Installation Requirements Electric Supply Clearances Mechanical Installation Electrical Hookup Water Fill Procedure WarmFlo Hi Temperature Mode &... -
Page 3: Mini-Boiler Selection Guide
INTRODUCTION The Mini-Boiler has been designed in a compact package with up to 9 kW of heating capabilities for radiant heat applications. When properly sized, the Mini-Boiler will provide the needed hot water to properly heat a space in a single zone application. The EMB-R Series models provide industry leading hydronic control for precise temperature management and ease of use. -
Page 4: Electrical Specifications
ELECTRICAL SPECIFICATIONS Model Power Input, Operation Circuit Breakers Power Rating Amps Btu/h EMB-R1-01-120-1 120-volt, 1-Staging – 1.4 kW 11.7A 4,777 EMB- R1-03-120-1 120-volt, 1- Staging – 3.0 kW 25.0A 10,236 EMB- R1-05-240-1 240/208-volt, 1- Staging 30A CB 5.0/3.8 kW 20.8A / 18.0A 17,060/12,796 EMB- R1-07-240-1 240/208-volt, 1- Staging... -
Page 5: Multiple Zones & Radiant Temperatures
MULTIPLE ZONES AND RADIANT TEMPERATURES Same water temperature all zones – this model series has a built-in supply control algorithm for staging the elements in single or multi zone applications. If more than one zone is required, a zone controller may be used. If using zone valves, the end switches of all the zone valves are paralleled and directly control the respective R and W zone inputs to turn on the boiler. -
Page 6: Room Thermostat Placement
ETL/Intertek certification, 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. -
Page 7: Electric Supply
ELECTRIC SUPPLY Element Model Volts Phase Btu/h Amps STG 1 STG 2 EMB- R1-01-120-1 1-60 Hz 4,777 11.67 – – EMB- R1-03-120-1 1-60 Hz 10,236 – – EMB-R1-05-240-1 240/208 1-60 Hz 5.0/3.8 17,060/12,795 20.8/18.0 – EMB-R1-07-240-1 240/208 1-60 Hz 7.0/5.3 23,885/17,913 29.2/25.2 EMB-R1-09-240-1... -
Page 8: Mechanical Installation
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. Damage to the vessel caused by galvanic corrosion voids Electro Industries’ warranty. -
Page 9: Electrical Hookup
ELECTRICAL HOOKUP Reference drawing BH311 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. - Page 10 Power robbing thermostats – power robbing thermostats can be used with the EMB-R Mini-Boiler models depending on thermostat brand and power consumption. 7. Load Management Interrupt Control (LMC) – 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! If load management is not used, simply leave the terminal labeled “load man”...
- Page 11 WATER ADDITIVES 1. Water treatment is strongly suggested to prevent scale deposits, corrosion from acids, oxygen, and other harmful elements within the specific water supply. Unless the source water is unusually poor and/or rust elements, additives are not required for use, but strongly suggested. Failure to manage the proper water voids the element warranty.
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Page 12: Water Fill Procedure
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 BX306. 1. Do not apply 240/208 volt power during water fill sequence. 2. Connect the temporary household water supply source (probably hose connection) to the "supply water connection"... -
Page 13: Warmflo Hi Temperature Mode & Emergency Heat
WARMFLO HI TEMPERATURE MODE & EMERGENCY HEAT Adding a jumper on the header marked “E HEAT” on the control board automatically sets the temperature setpoint to maximum 180 °F. See image to the right. In other words, with the jumper installed, the system will command full on to reach 180 °F and control to that temperature. -
Page 14: Operational Tips
OPERATIONAL TIPS 1. Indicator lights – there are nine indicator lights on the front cover. Figure 1 under Aquastat Operation is a reproduction of the front decal giving definition and information for using these indicator lights. 2. Boiler Power green LED indicates 24-volt is present on the control board. On the EMB-R1 models an outdoor sensor is not included. -
Page 15: Troubleshooting Helps
TROUBLESHOOTING HELPS Front Cover LED Indications The two red LEDs labeled “MANUAL RESET LIMIT” and “AUTO RESET LIMIT” are an indication of whether the manual or auto temperature limits have failed. The green LED labeled “BOILER POWER” is an indication of whether the boiler control board is powered/unpowered. - Page 16 AVAILABLE, ELECTRO INDUSTRIES, INSTALL PARTS OR KITS EMB-PK MINI-BOILER INSTALLATION PLUMBING KIT PREFERRED, 3/4" EMB-P2 PUMP KIT 1/25HP CIRCULATOR 5590 EXPANSION TANK 40K BTU 2.1 GALLON 5576 AIR ELIMINATOR 3/4" ROLLAIRTROL 5453 VALVE RELIEF 30 PSIG .75” NPT MALE 5456A GAUGE PRES/TEMP 75 PSI/320DG F .25"...
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Page 17: Bx306
"BASIC" MECHANICAL PIPING DIAGRAM Mini-Boiler BX306 P.1 REV A 07/20/22... - Page 18 "PREFERRED" MECHANICAL PIPING DIAGRAM Mini-Boiler BX306 P.2 REV A 07/20/22...
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Page 19: Bh311
MINI-BOILER BASIC HOOKUP (EMB-R*-*-*-1, EMB-M*-*-*-1) Rev A 08/02/22: Released BH311 Rev. A PG 1 OF 2... - Page 20 MINI-BOILER HOOKUP (EMB-R*-*-*-1, EMB-M*-*-*-1) BH311 Rev. A PG 2 OF 2...
- Page 22 oiler ccessories oiler ccessories 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. Pumps, Actuators, Valves Standard Features •...
- Page 23 Electro Industries’ boilers come standard equipped with outlet temperature/pressure gauge, pressure relief safety valve, and when applicable, the WarmFlo electronic control sensors. These kits provide the additional components for easy installation:...
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Page 24: Xx017
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. - Page 25 The decision whether to repair or, in the alternative, replace products or product parts shall be made by Electro Industries, Inc. or its authorized representative.
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