Midco Economite RE6850B - Manual (Page 2)

Part 1 Installation
Specifications 1
CAUTION: The ECONOMITE Models RE6700B, RE6850 and RE6850B burners are
not intended for outdoor installation and must be protected from excessive moisture.
Provide adequate clearance for service and proper operation.
If the former automatic oil burner gave trouble-free operation, it is probable that the heating
plant area has sufficient infiltration of air for combustion and dilution of flue gases.
Nevertheless, the area must be checked.
Open basement or utility areas of normal construction, without storm windows or tight
doors, will generally allow sufficient air infiltration. However, if the heating plant is located in
a tight or separate room, ventilation to an open area as described above will be required.
Install two permanently open grills, each sized on the basis of one square inch free area per
1,000 BTU (but not less than 100 square inches) of the total input rating of all gas utilization
equipment in the combined space. One grille should be located within 12 inches of the
ceiling, the other within 12 inches of the floor.
If the heating plant is located in an area of unusually tight construction, or if an exhaust
fan, kitchen ventilation system, clothes dryer and/or fireplace is installed in the building,
provisions must be made for an outside air supply near the heating appliance area. Install
permanently open grills sized at not less than one square inch free area per 4,000 BTU of
burner input. When ventilating through horizontal ducts, grills should be sized at not less
than one square inch free area per 2,000 BTU of burner input. In any case, the minimum
dimension of rectangular air ducts shall not be less than 3 inches.
In Canada, for detailed ventilation requirements, refer to standard CAN 1-B149.1 or .2
and/or local codes.
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Part 1
Installation
2
I Ventilation
The ECONOMITE Models RE6700B, RE6850 and RE6850B burners with intermittent
spark ignited pilot are adaptable to most gas utilization equipment, including gravity and
forced circulation furnaces, boilers and hot water heaters. They are particularly
recommended for firing horizontal or downdraft equipment since no draft is required to
maintain a pilot. Power burner design makes them perfectly suited for oil burner
replacement, including rooftop and industrial applications.
AIR DELIVERY (Approximate Air Delivery at Zero Draft)
RE 6700B RE 6850 RE 6850B
146SCFM 2 180SCFM 2 180SCFM 2
FIRING RATE (NATURAL OR PROPANE ) 3
RE 6700B RE 6850 RE 6850B
MAX MBH 4 700 825 825
MIN MBH 4 275 275 275
GAS SUPPLY PRESSURE REQUIRED
NATURAL ......................................................................................... 6.0" to 14.0" W.C.
PROPANE ........................................................................................ 5.0" to 14.0" W.C.
TUBE DIAMETER................................................................................. 6"
TUBE LENGTH..................................................................................... 9"
RECOMMENDED COMBUSTION CHAMBER SIZE (AT MAX. BTU/HR)
RE6700 RE 6850 RE 6850B
WIDTH 15" 15" 15"
LENGTH 25" 30" 30"
ELECTRICAL SUPPLY..................120 VAC....... 60 Hertz 5 ............... 3.5 AMPS 7
IGNITION CONTROL MODULE VOLTAGE ....... 24 VAC, RE6700B / RE6850B
FLAME SAFETY....Electronic Flame Safety with Spark Ignited Pilot and 100% Shut-Off
6
........ 120 VAC, RE6850
TABLE 1: Burner Specifications
1. Standard burners are shipped as NATURAL gas models. Contact your Midco dealer for
PROPANE gas burners.
2. SCFM = Standard Cubic Feet / Minute.
3. All Ratings Based on 1000 BTU/Cu. Ft. NATURAL, 2500 BTU/Cu. Ft. PROPANE at sea level.
Derate burner for altitude over 2,000 feet by 4% for each 1,000 feet above sea level.
4. 1 MBH = 1,000 BTU/hr.
5. For 50 Hertz applications the RE6700, RE6700B, RE6850 and RE6850B will be derated by 20%.
Contact the factory for details. NOTE: Burners rated for 50Hertz are not UL Listed.
6. See Section XII of Operational Sequence.
7. Inrush AMP draw us higher - if needed, consult the factory.