Blodgett MT3870, Руководство по обслуживанию и ремонту

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CALIBRATION AND ADJUSTMENT
4-2
REGULATED GAS PRESSURE
1. Let the oven run up to 510 F (266 C). You may
now verify the operational and regulated gas
pressures.
Incoming static gas pressure to the unit, with all the
gas appliances drawing from the supply, should be
a minimum of 5.5" W.C. (13.7 mbar) for natural gas
and 11" W.C. (28 mbar) for propane gas. The manĆ
ifold pressure, if measured after the regulator loĆ
cated inside the control box, must be 3.5" W.C. (9
mbar) for natural gas and 10" W.C. (25 mbar) for
propane gas. For CE pressures reference TABLE 2
on page 1-2 of the Introduction.
The pressure can be checked at the tap on the dual
regulated gas valve or at the tap on the tee valve.
If pressure adjustments are needed, turn the adĆ
justing screw located under a screw cap on the left
front side of the dual regulated valve. Adjust the
gas pressure by turning the screw clockwise to
raise the gas pressure and counterĆclockwise to
lower the gas pressure. Be sure to reinstall the
screw cap; should the diaphragm rupture this cap
acts as a flow limiter
The air shutter disc on the burner blower motor, loĆ
cated inside the control box at the top of the asĆ
sembly, is factory adjusted to provide the most effiĆ
cient blue flame possible at sea level. Visually
examine the flame to verify it's quality. Should it
need adjustment, increase or decrease the air mixĆ
ture to attain the best flame quality.
Pressure
Tap
Regulator Cap
Regulator
Adjustment
Pressure Regulator (U.S. models)
Regulator
Cap
Regulator
Adjustment
Outlet
Pressure
Tap
Pressure Regulator (Some export models)
Inlet
Pressure Tap
FIGURE 2
Setting Equipment for Other Types of Gas - CE Models
1. Shut off the gas valve and turn off the operating
switch.
2. Dismantle the gas block by means of couĆ
plings.
3. Dismantle the main burner and replace the inĆ
jector.
4. Replace pilot injector.
5. Install the burner and gas block.
6. Check for leakage and possible loose electriĆ
cal connections.
7. Adjust gas pressure if necessary, See
FIGURE 3.
Gas Pressure
Adjustment
Pressure
Tap
Pressure Regulator (CE models)
FIGURE 3