Midco Unipower MPG Series - Manual (Page 2)

Part 1 Installation
Specifications 1
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CAUTION: MPG-Series are not intended for outdoor installation and must be protected
from excessive moisture. Provide adequate clearance for service and proper operation.
Open basements will generally allow sufficient air infiltration, so special provisions will seldom
be required. If the heating plant is located in a separate furnace room or in an unusually tight
basement, permanent means must be provided to supply an ample volume of fresh air for
combustion and boiler room ventilation. A direct opening to the outside air should be provided
sized on the basis of 1/2 square foot of free opening for each 1,000,000 BTU of burner rating
when the vent connector is equipped with a barometric draft control, 11/2 square feet when
equipped with a draft hood. If the ventilation opening is screened, it should be of 11/4" mesh.
Part 1
Installation
2
I Ventilation
The Midco power gas burner, MPG Series, is designed for firing natural gas or propane
gas in most applications. The burner is a self-contained unit including a blower housing
assembly, a burner gas manifold assembly, a burner cartridge, a flame safeguard, and a
main and pilot gas train. The burner is easy to install, it includes mounting the burner to the
gas utilization equipment, piping the main and pilot gas train and connecting the power
supply. Before shipment every burner is operationally fire tested at the factory, for
unassembled valve trains the pilot solenoid and ignition system is tested.
Burner Style Power Type Sensing
Pilot Type Intermittent; Flame Rod Sensing, Spark Ignition(Standard)
Intermittent; UV Sensing, Spark Ignition (Optional)
Interrupted; Flame Rod Sensing, UV Flame Scanner (Optional)
Pilot Safety Instantaneous Electronic Flame Safeguard
Voltage Standard
Controls 120/1/60
Motor 115/1/60
230/1/60 (Optional)
U.L. Listed -U.L.C. Listed
Non UL 220V / 50HZ - Contact Factory
MPG 1.5G **
MPG 2.5G **
1500
2500
325
540
4" W.C. 4
4" W.C.
4" W.C. 4
4" W.C.
Natural Propane
Maximum
Input 1
MBH/HR.*
Maximum
Air
SCFM 3 Models
Inlet Gas Pressure
Required 2
MPG 1.5G
MPG 2.5G
1 / 2
3 / 4
0.13 - 1.20" W.C.
0.09 - 0.80" W.C.
0.08 - 0.70" W.C.
0.06 - 0.50" W.C.
Natural Propane
Motor HP
(3450 RPM)
See Table 3
See Table 3
Recommended
Combustion
Chamber
Size Models
Burner Manifold Pressure 1
*1 MBH=1,000 BTU/HR
** High Turn Down Models available - contact factory
1. Values given based on 0" W.C. firebox pressure, altitudes to 2,000 feet. Derate burner
for altitudes over 2,000 feet by 4% for each 1,000 feet over sea level.
2. Maximum inlet pressure both gases: 14" W.C. Refer to Section VI Piping for high pressure.
3. SCFM=Standard Cubic Feet/Minute
4. Requires special valve train - contact factory
Table 1: Burner Specifications
*1 MBH=1,000 BTU/HR. See Table 6 for gas pressure and air shutter settings
Models
MPG 1.5G
MPG 2.5G
500
850
1500
2500
1500
2500
1400
2450
1.0
1.0
1200
2000
Maximum Capacity in MBH at
Combustion Chamber-
Back Pressure
0" W.C. .25" W.C. .50" W.C.
Minimum
Firing
Rate
MBH*
Maximum
Back
Pressure
in " W.C.
Maximum
MBH* at
Maximum
Back Pressure
Table 2: Maximum Capacity at Specified Back Pressures
500
850
Minimum
Input 1
MBH/HR.*