Frymaster H50 Series Service And Parts Manual page 27

If popping occurs only during peak operating hours, the problem may be incorrect or fluctuating gas
pressure. Verify that the incoming gas pressure (pressure to the gas valve) is in accordance with the
appropriate table below, and that the pressure remains constant throughout all hours of usage. Refer
to Check Burner Manifold Pressure in the section of 1.4 for the procedure for checking the
pressure of gas supplied to the burner.
CE Standard
for Incoming Gas Pressures
for Fryers Manufactured After April 1999
Pressure
(1)
Gas (mbar)
G20 20
G25 20 or 25
G30 28/30 or 50 2 x 2.05 2 x 2.05
G31 37 or 50
(1) mbar = 10,2 mm H
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If popping is consistent during all hours of operation, the most likely cause is an insufficient air supply.
Check for "negative pressure" conditions in the kitchen area. If air is flowing into the kitchen area, this
indicates that more air is being exhausted than is being replenished and the burners may be starved for air.
If the fryer's gas and air supplies are okay, the problem is most likely with one of the electrical
components. Examine the ignition module and controller for signs of melting/distortion and/or
discoloration due to excessive heat build-up in the fryer. (This condition usually indicates improper flue
performance.) A melted or distorted ignition module is automatically suspect and should be replaced,
but unless the condition causing excessive heat is corrected, the problem is likely to recur.
Verify that the ignition wire is tightly connected at both ends and free of obvious signs of damage.
Again, if damage is due to excessive heat in the fryer, that problem must also be corrected.
Check for proper operation by disconnecting the wire from the ignitor (spark plug), inserting the tip of a
screw driver into the terminal, and holding it near the frame of the fryer as the power switch is placed in
the ON position. A strong, blue spark should be generated for at least 4 seconds.
MAKE SURE YOU ARE HOLDING THE INSULATED HANDLE OF THE SCREWDRIVER
AND NOT THE BLADE. THE SPARKING CHARGE IS APPROXIMATELY 25,000
Examine the ignitor (spark plug) for any signs of cracking. A cracked ignitor must be replaced.
Orifice Diameter
Regulator Pressure
Single Dual Single Dual
Vat Vat Vat Vat
2 x 3.40 2 x 3.40 7 mbar 7 mbar
2 x 3.40 2 x 3.40 10 mbar 10 mbar
17 mbar 17 mbar
2 x 2.05 2 x 2.05 20 mbar 20 mbar
O
Non-CE Standard
for Incoming Gas Pressures
Gas
Natural
LP
for Incoming Gas Pressures
for Fryers Manufactured Through April 1999
Pressure
(1)
Gas (mbar)
G20 20
G25 20 or 25
G30 28/30 or 50 2 x 2.05 2 x 2.05
G31 37 or 50
(1) mbar = 10,2 mm H
Minimum Maximum
6" W.C. 14" W.C.
1.49 kPa 3.48 kPa
14.93 mbar 34.84 mbar
11" W.C. 14" W.C.
2.74 kPa 3.48 kPa
27.37 mbar 34.84 mbar
DANGER
VOLTS.
1-22
CE Standard
Orifice Diameter
Regulator Pressure
Single Dual Single Dual
Vat Vat Vat Vat
2 x 3.40 2 x 3.40 7 mbar 7 mbar
2 x 3.40 2 x 3.40 10 mbar 9 mbar
17 mbar 16,5 mbar
2 x 2.05 2 x 2.05 20,2 mbar 18,5 mbar
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