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09/17/2014  

 

 

BI308 

Electric 

 

Mini-Boiler

 

 

 

HI TEMP MODEL 

 

Installation & Operating 

Instructions

 

 

EMB-H-5 

240-volt, 1-stage 

30A CB 

4.5 kW 

15,000 Btu/h 

EMB-H-7 

240-volt, 2-stage 

45A CB 

7 kW 

24,000 Btu/h 

EMB-H-9 

240-volt, 2-stage 

60A CB 

9 kW 

31,000 Btu/h 

 

Application – 

This Electro-Boiler is factory equipped with 

WarmFlo

 smart controller.  

WarmFlo

 

automatically regulates outlet water temperature based upon preset, front panel, temperature selection.  This 
model does not have an outdoor sensor and is not programmed for outlet temperature ramping (outdoor reset 
concept).  If your application is “outdoor reset”, you should consider using model EB-MO series. 
 
Primary application is any hydronic water heating system (high or low temperature systems) where reduced 
flow or radiation can cause overheat conditions (example, zones).  

However

, if it is a mixture of large and small 

zones, the sudden capacity and flow changes may cause some internal timing/over temp conditions. 
 
This series is equipped for 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. 

 

Drawings: BX305 
 BH310 
 UAW411 
 BL001 
 XX017 

 

 

Summary of Contents for EMB-H-5

Page 1: ...s outdoor reset you should consider using model EB MO series Primary application is any hydronic water heating system high or low temperature systems where reduced flow or radiation can cause overheat conditions example zones However if it is a mixture of large and small zones the sudden capacity and flow changes may cause some internal timing over temp conditions This series is equipped for load ...

Page 2: ...ntrol 2 Zone Controller 2 Safety Temperature Control 2 Room Thermostat Placement 2 Water Flow Calculation 2 Installation Requirements 3 Electric Supply 3 Clearances 3 Mechanical Installation 4 Electrical Hookup 5 Water Fill Procedure 6 Operational Tips 8 Troubleshooting Helps 9 Drawings BX305 BH310 UAW411 BL001 XX017 ...

Page 3: ... consider installing zone controller EB 5415A see page 2 for details MULTIPLE ZONES AND RADIANT TEMPERATURES Same water temperature all zones in this case the system can be setup as one pump with the water circulated through the boiler and directly to a manifold containing the various zone valves Although this model series has a built in outlet sensing and controller mechanism for staging the elem...

Page 4: ...r 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 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...

Page 5: ... 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 hel...

Page 6: ...d loop hydronic heating system an expansion tank is required 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 wi...

Page 7: ...TE 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 by approximately 25 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 max...

Page 8: ...ify 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 B...

Page 9: ...nst 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 h...

Page 10: ...angement 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 160 F 53 C the maximum operating system pressure should be approximately 18 PSI 124 kPa If the PSI or kPa ...

Page 11: ...0 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 simply press the red button located on the limit switch Comment The hi limit auto reset LED and utility off peak LED...

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Page 18: ...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 19: ...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 20: ...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 21: ...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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