Midco Economite RE4400DS - Manual (Page 7)

7
Burners are approved for use with NATURAL gas or PROPANE gas and should be used only
with the gas specified on the rating plate. If the supplied burner is designed to run on natural
gas and needs to be changed to run on propane, a conversion kit is available from Midco
® .
? The gas input should be set at the heating rate determined by the building heat loss and/or
heating plant survey, but not exceeding the rated maximum input of the gas utilization
equipment or Economite burner.
____________________________
WARNING: Ignition is automatic. Make spark observations into combustion
chamber only with Main Manual Shut-Off Valves closed. Confirm that gas utilization
equipment does not contain any accumulated gases. Purge as described in step 3
below.
CAUTION: Cover plates, guards, and enclosures must be maintained in place
at all times except during maintenance and service.
1.
Check the burner piping and valves for gas leaks by applying a weak liquid soap
solution to unions and joints with the gas supply on. Leakage will be indicated by the
appearance of soap bubbles. Locate and correct all gas leaks before proceeding.
WARNING: DO NOT USE OPEN FLAME.
2. Purging the air from the gas supply line at this step will expedite first light-off.
IMPORTANT: Purge outside the building. Do not purge into the gas utilization
equipment.
3. To purge the gas utilization equipment and chimney of any accumulated gases, turn
main Manual Gas Cock OFF, turn burner power on, and set operating control to ON or
thermostat to call for heat. Let the blower run long enough to accomplish four
combustion chamber volume air changes, but not less than five minutes.
CAUTION:Make sure that the capacity range of the burner, manifold pressure,
and the preliminary combustion air shutter setting are suitable for capacity rating of
the gas utilization equipment. Refer to Section VIII and Table 3.
Part 1
Installation Continued
Part 1 Installation
J
B
C
E
E
J
-
-
-
J
B
-
RE4400DSA
Table 3: Capacity and Preliminary Gas Settings
1. Adjust the main regulator to vary the manifold gas pressure and burner input within the range
shown. Do not exceed pressure as listed in Table 3, under any circumstances. Use combustion
readings (CO and O2) and a flow meter to determine exact inputs.
* Spud Size and approximate manifold gas pressure setting: as shipped. Air shutter set full open.
NOTE: For LP Conversion kit contact the factory
DATA FOR TABLES IS APPROXIMATE AND BASED
ON “0" OVERFIRE PRESSURE AT SEA LEVEL
Input
MBH Orifice
Size
(Inches)
Natural Gas
Natural Gas / Propane Gas Orifice Size and Pressure Settings
Manifold 1
Pressure
("W.C)
Orifice
Size
(Inches)
Propane Gas
Manifold
Pressure
("W.C)
3.5
4.7
4.2
4.8
2.8
0.45
0.358
0.290
0.261
0.219
0.219
0.358
4.7
3.6
2.7
3.3
3.5
0.6
No Orifice
No Orifice
No Orifice
0.358
0.290
No Orifice
400
350
300
250 *
200
132
Letter
Stamp
Letter
Stamp
J
B
C
E
E
J
-
-
-
J
B
-
RE4400DS
2.8
3.6
3.1
3.2
2.1
0.3
0.358
0.290
0.261
0.219
0.219
0.358
4.3
3.3
2.4
2.9
2.8
0.6
No Orifice
No Orifice
No Orifice
0.358
0.290
No Orifice
400
350
300
250 *
200
132
VII Main Gas
Input Selection
VIII Initial Start-
up /Adjustment