Portable Dryer Troubleshooting | Wiring Reference |
New Fenwal Board Wiring
The B. GND terminal is used to ground the burner and to complete the flame current signal circuit. This terminal is new for systems that used the older version of the Fenwal board. This terminal must be connected to the burner (chassis) ground not only to ensure the best, long term, stable flame signal, but also to ground the burner for
proper sparking.
The use of a burner ground terminal eliminates the problem of loss of flame sense signal due to a missing or loose neutral or ground (green) wire at the 120 VAC power source. The new board has been designed such that reversing the polarity of the 120 VAC line does not cause a loss of flame signal. Thus providing a more reliable flame signal along with a reduction of nuisance lockouts, due to its design and the use of the B. GND terminal.
L2
V2
(A) L1
GAS
VALVE
(B)V1
S1 H.V.
E2 E1
NEU.
120
VAC | H.V. | |
S1 | ||
HOT | ||
B. GND | ||
|
L1
BURNERV2 L2
V1
NC
BURNER
HOT
120
NEU. VAC
GAS
VALVE
Old version with Remote Flame Sense. | New version with Remote Sense using existing |
| spark and remote sense electrodes. |
Note that terminal E2 on the old version has been replaced by terminal B.GND on the new board.
IGNITOR
Part No.
Flame Safety Board
BURNER GROUND (B. GND)
FLAME ROD
39
