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Electro Industries Mini-Boiler BH309, Installation & Operating Instructions Manual, Page: 1 / 18

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Electro Industries Mini-Boiler BH309 Installation & Operating Instructions Manual Download Page 1

08/07/2008  

BI301D 

Electric 

 

Mini-Boiler

TM

 

 
 

Installation & Operating 

Instructions

 

 
 
 

Model EMB-5  

4.5 kW   

3 GPM (11.35 L/min) minimum flow 

Model EMB-9  

  9 kW    

4 GPM (15.14 L/min) minimum flow 

 
 
 

Application

 - Low temperature, low pressure, radiant underfloor heating systems. 

 

Comment

 - If this  application is for traditional hydronics heating requiring temperatures greater 

than 140

°

 F (60° C) and capacities larger than shown above, contact factory for other Electro-

Boiler product series. 
 

Accessories – 

Attached BL001 lists various accessory or option items which are not part of basic 

Electro-Boiler.  Page 1 gives information on a zone control update which stages elements based 
upon zone capacity. 
 

Note: 

This product meets the requirements of the ASME Boiler and Pressure 

Vessel Code. 
 

Drawings: 

BX301 

 BH302 
 BS302 
 BL001 

 

Summary of Contents for Mini-Boiler BH309

Page 1: ...itional hydronics heating requiring temperatures greater than 140 F 60 C and capacities larger than shown above contact factory for other Electro Boiler product series Accessories Attached BL001 lists various accessory or option items which are not part of basic Electro Boiler Page 1 gives information on a zone control update which stages elements based upon zone capacity Note This product meets t...

Page 2: ... 1 Built in Temperature Control 2 Water Flow Calculation 2 Installation Requirements 3 Mechanical Installation 3 Water Fill Procedure 4 Electrical Hook up 4 Slab Stat 5 Zone Controller 6 Operational Tips 7 Drawings Piping install kit BX301 Hook up BH302 Internal Wiring reference information BS302 Boiler Accessories BL001 ...

Page 3: ... 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 remote sensing thermostat such as Electro Industries ES 24 SRO This type of device only requires a 7 mm hole drilled in the concrete at some center wall location Quick response hydronic tubing ...

Page 4: ...ally insert an open with temperature rise aquastat switch contact Set the aquastat below the 160 F 71 C limit value which allows the aquastat to turn off both elements Note Aquastat setting suggest aquastat settings be approximately 5 F 2 7 C higher than designed outlet temperature for the system Other options request procedure BD002 TEMPERATURE CONTROL The limits or temperature sensing components...

Page 5: ... 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 o...

Page 6: ...rovided Building Water Supply Connection The intent of this connection is temporary and for fill purposes only The installer has the responsibility of complying with local building codes Local codes may require a backflow preventor when the domestic water supply line is fixed to the boiler mechanical piping WATER ADDITIVES 1 Unless the source water is unusually poor and or rust elements additives ...

Page 7: ...is unit is less than 10 kW no fusing or circuit breaker at the boiler itself is required The 240 volt L1 L2 is connected directly to the left bottom terminal block Only copper wire is allowed 3 Circulating Pump the two screw terminals orange wires represent a switch closure see drawing 10 amp maximum to operate the circulating pump motor Voltage for the pump must come from its own source Wiring en...

Page 8: ... to operate zone valves Note Two zones only are shown because this boiler does not have internal temperature control and the zone radiation must adequately handle the full boiler capacity Do not use this simple two zone scheme for unbalanced zones or more than two The WarmFlo series product EMB W 9 is specifically designed for unbalanced or multi zone applications There is a WarmFlo field upgrade ...

Page 9: ...d on the side of the hi limit 4 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 thermos...

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Page 12: ...NAL N C CONTACT DEVICE IN PLACE OF THE JUMPER CAN OPEN ELEMENT 2 AND REDUCE OUTPUT CAPACITY 6 TRANSFORMER FOR INTERNAL CIRCUITS ONLY ZONE VALVES ETC MUST HAVE THEIR OWN 24V SOURCE 7 HIGH VOLTAGE LOW VOLTAGE WIRING MUST HAVE MINIMUM 1 2 5CM SPACING NEUTRAL 120VAC CIRCUIT BREAKER SOURCE POWER CIRCUIT BREAKER ARL L2 L1 PUMP TB2 C TB2 R TB2 W TB1 TB1 W3 W2 UPCB5620 BLU WHT COM NO BLUE T10 TB1 COM NO T...

Page 13: ...RENT RATING UAS300 CIRCULATING PUMP SWITCH CLOSURE POWER CIRCUIT IS EXTERNAL CONTACT RATING 10A AT 120 VOLTS L2 G G L1 L2 T STAT CABLE T4 T3 ZONE 1 VALVES ZONE 1 2 Thermostats Room C R W C 1 M W 24V C 120V C W 1 M ZONE 2 R C W 5616 TRANSFORMER R TYPICAL ZONE VALVE 2 WIRE STAT ISOLATED END SWITCH EXAMPLE HONEYWELL V8043F SERIES OR EQUIVALENT 4 WIRE THERMOSTAT CABLE 4 WIRE THERMOSTAT CABLE RED RED R...

Page 14: ......

Page 15: ...tem for Brand X boilers or dual EB R L E Series EB ZC 4 wiring and convenience interface isolated boiler end switch EB 5415A low cost 2 or 3 zones sheds one boiler stage Mini Boiler enhancement ZONE CONTROLLER SLAB STAT Sensing and controlling the system based upon radiant floor surface temperature or the concrete mass has very positive benefits Radiant floor air stat in the same area as a forced air...

Page 16: ...es 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 5585 Mini Boiler 10 kW TS Series 5586 TS Series Standard 5578 3 4 Pipe 5582 1 Pipe 5579 1 1 4 Pipe 120V 1 25 HP maintenance free wet rotor circulator Pump curve example 5...

Page 17: ...ade by Electro Industries or its authorized representative Electro Industries will cover reasonable labor costs to repair defective product or product parts for ninety 90 days after installation 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 throug...

Page 18: ...ill 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 fr...

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