Midco F400-33 - Manual (Page 5)

SPUD
DRILL
SIZE
#21(.159)
#15(.180)
#9(.196)
#3(.213)
#1(.228)
17/64(.265)
9/32(.281)
19/64(.296)
BURNER
INPUT
MBH 1
185
300
300
400
400
540
540
700
SPUD
DRILL
SIZE
11/32
(.343)
25/64
(.390)
7/16 3
(.437)
SPUD
RE-
MOVED
DRIP
LEG
PILOT TUBING
MANUAL PILOT VALVE
PILOT REGULATOR
MAIN AIR
CONTROLLING SHUTTER
(COUNTER CLOCKWISE
TO OPEN)
BLOWER MOTOR
MAIN AND
REDUNDANT MAIN
GAS VALVES
BALL VALVE
TEST COCK
"PEEP" SIGHT
PILOT AND AIR TUBE
MAIN TEST TAP
PILOT TEST TAP
PRIMARY AIR ADJUSTMENT
SPARK GENERATOR
FLAME
SAFEGUARD
CONTROL
PILOT SOLENOID
MAIN
REGULATOR
MAIN REGULATOR
VENT
MANUAL
BALL VALVE
10
275
400
500
700
700
TYPE
OF
GAS
Natural
Propane
Natural
Propane
Natural
Propane
Natural
Propane
Natural
APPROXIMATE CAPACITY-MBH
LENGTH OF PIPE
100
225
300
475
450
700
700
PIPE
SIZE
3Ú4
(400-33 only)
1
1 1 Ъ
4
1 1 Ъ
2
2
20
300
350
550
700
700
40
200
250
375
500
700
700
60
200
300
400
625
600
700
700
-5-
FIGURE 5 Piping Connections
MANIFOLD
PRESSURE
W.C. 2
10.0"
MANIFOLD
PRESSURE
W.C. 2
1.5"
3.5"
2.0"
3.5"
2.0"
4.0"
1.85"
3.2"
NATURAL GAS
BURNER
INPUT
MBH 1
185
250
300
350
400
540
625
700
PROPANE GAS
CAUTION: Purge outside the building. Do not
purge into the gas utilization equipment combustion
chamber.
CAUTION: Do not exceed maximum or minimum
rated capacity of burner model as shown in Table 1.
Capacities shown are for a total pressure drop of
0.3"W.C. For 0.5"W.C. pressure drop, multiply capacity
shown by 1.3 For higher permissible pressure drops,
consult your utility.
TABLE 2: Schedule 40 NPT Pipe-Capacity Chart
VII MAIN GAS SPUD SELECTION
Burners are approved for use with NATURAL or
PROPANE gas and should be used only with the gas
specified on the rating plate.
■ 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.
■ Burners are shipped equipped for NATURAL gas; the
model 400 with a 11/32 drill spud installed, and the F400
with the spud removed. Compare the gas input required
with the spud capacities shown in the spud table and, if
necessary, install the spare spud (see Figure 7).
DATA IS APPROXIMATE AND BASED ON Ò0"
OVERFIRE PRESSURE AT SEA LEVEL
1. Input range of spud. Adjust the main regulator to
vary the manifold gas pressure and burner input
within the range shown for a specific spud drill size.
With PROPANE, do not exceed 11.0"W.C. under
any circumstances.
2. Approximate gas pressure at manifold gas pressure
tap.
3. Drill out 25Ú64 spare spud to 7Ú16.
TABLE 3: Spud Capacity and Preliminary Gas Settings.