Midco F400B-33 - Manual (Page 5)

SPUD
DRILL
SIZE
25/64
(.390)
7/16 3
(.437)
SPUD
RE-
MOVED
BURNER
INPUT
MBH 1
300
400
400
540
540
625
700
MANIFOLD
PRESSURE
W.C. 2
2.0"
3.5"
2.0"
4.0"
1.85"
2.5"
3.2"
SPUD
DRILL
SIZE
#9 (.196)
#3 (.213)
#1 (.228)
17/64 (.265)
9/32 (.281)
19/64 (.296)
BURNER
INPUT
MBH 1
300
350
400
540
625
700
MANIFOLD
PRESSURE
W.C. 2
10.0"
NATURAL GAS PROPANE GAS
DATA IS APPROXIMATE AND BASED ON "0"
OVERFIRE PRESSURE AT SEA LEVEL OVERFIRE
TABLE 2: Spud Capacity and Preliminary Gas Settings
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 25/64 spare spud to 7/16.
VIII INITIAL START-UP/ADJUSTMENT
WARNING: Ignition is automatic. Make spark
observations into combustion chamber only with
Main and Pilot Manual Shut-Off Valves closed.
Confirm that gas utilization equipment does not
contain any accumulated gases. Purge as described
in step 3 below.
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 Manual Gas Cock
Knob on Combination Valve to OFF, close Pilot
Manual Shut-Off Valve, 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 air changes, but not less than five minutes.
4. IMPORTANT:Make sure that the capacity range of
the installed spud and the preliminary combustion
air shutter setting are suitable for capacity rating of
the gas utilization equipment. Refer to Section VII
and Table 2.
5. RESET the Electronic Control by setting the
operating control to OFF or the thermostat below
room temperature for at least 30 seconds. See
Section XII.
6. Confirm that Main and Pilot Manual Shut-Off Valves
are open. Turn Manual Gas Cock Knob on
Combination Valve to ON.
7. Turn operating control to ON or set thermostat above
room temperature. After a 30 second pre-purge, the
pilot should ignite. Whenever the burner pilot fails to
light during the 15-second ignition trial, or if the
flame is lost during the burner run and is not
re-established within 15 seconds after the pre-purge,
the Electronic Control will shut off the Combination
Valve and LOCK OUT. To RESET the Electronic
Control for restart, de-energize the Electronic Control
by setting the operating control to OFF or thermostat
below room temperature for at least 30 seconds. If
burner still fails to light, turn it off and repeat from
step 5 above. Then if necessary, refer to the
TROUBLE CHART to isolate the problem.
WARNING: Repeated unsuccessful attempts
to light will result in accumulated gases in gas
utilization equipment and chimney. To prevent
these gases from reaching an explosive level,
periodically purge the gas utilization equipment
and chimney as described in step 3 above.
CONSTRUCTION MAY VARY BY BURNER APPLICATION REQUIREMENTS
FIGURE 5 Piping Connections
-5-