Midco DS45B - Manual (Page 2)

Part 1 Installation
Specifications
Part 1
Installation
Derate burner for altitudes over 2,000 feet by 4% for each 1,000 feet of additional elevation.
IMPORTANT: The ECONOMITE DS45B is 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 gas
utilization equipment 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 gas utilization equipment
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 gas utilization equipment 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, provision must be made for an outside air supply near the gas utilization equipment
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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Clean the gas utilization equipment, combustion chamber, heat exchanger interior and
flue connections. Remove all adhering tars, scale, dirt and soot. Inspect for actual leaks
and/or potential leaks.
Cement all joints, including those in the gas utilization equipment base and around door
frames, to prevent leakage into or out of the combustion chamber.
The access or firing door should open easily to relieve pressure. If positive latches exist,
they should be modified to permit easy opening; a spring loaded door holder is
recommended.
On all boilers, make certain the pressure relief safety valve is in good operating condition.
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A combustion chamber liner is normally required to protect non-heat transfer surfaces and to
provide a radiant bed for rapid heat transfer to the primary surfaces of the heat exchanger.
In most cases an existing oil burner combustion chamber liner can be used, if in good
condition.
2
SPECIFICATIONS NATURAL or PROPANE Gas
AIR DELIVERY (Approximate Air Delivery at Zero Draft Draft)........ 85 SCFM*
MAXIMUM FIRING RATE**..............................................................400 MBH***
MINIMUM FIRING RATE**...............................................................200 MBH***
TUBE DIAMETER................................................................................4 inches
TUBE LENGTH....................................................................................9 inches
MINIMUM COMBUSTION CHAMBER SIZE
400 MBH................................................10" W X 161/2" L or 15" dia.
300 MBH.......................................................9" W x 14" L or 13" dia.
200 MBH.......................................................7" W x 11" L or 10" dia.
GAS PRESSURE REQUIRED
NATURAL................................................................5.0" to 14.0" W.C.
PROPANE.............................................................11.0" to 14.0" W.C.
STANDARD VOLTAGE......................................120 Volts..................60 Cycle
FLAME SAFETY..........Direct Spark Ignition of Main Flame, Electronic Safety
MAIN AUTOMATIC VALVE...........................................3 Function Redundant
* SCFM = Standard Cubic Feet/Minute
** Ratings Based on 1000 BTU/cu. ft. NATURAL, 2500 BTU/cu. ft. PROPANE at
Sea Level
*** 1 MBH = 1,000 BTU/Hr.One gallon fuel oil =140MBH.
II Preparation of the Gas
Utilization Equipment
I Ventilation
III Combustion Chamber