Grain Systems PNEG-1928 - Manual (Page 7)

PNEG-1928 Page 7 of 9
UV Sensor Retrofit Instruction Manual for Portable Dryers
Figure 10 Flame Sensor Wire Location
5. Disconnect the flame probe or sensor wire from terminal S1 which is shown in Figure 10 . It is the
thin red 18 gauge high temperature wire (Teflon) and tie it back out of the way. Attach the red wire
from the UV sensor cable with the spade terminal attached to the S1 terminal of the fenwal. (You
may need to peel back more of the grey sheathing of the UV cable to gain more length of the
wire conductors to reach all the connection points.)
6. Strip the insulation off both ends of the supplied white wire and insert one end into either terminal
22 or 24 (whichever of the white terminals that contains a single wire) and the other end into
terminal 2 of the relay base.
7. Attach the black wire from the UV sensor cable into terminal 2 of the relay base. This will provide
the grounding path to the flame signal through neutral.
8. Attach the yellow wire from the UV sensor cable into terminal 1 (black terminal) of the terminal strip
in the fan/heater box.
9. Attach the orange wire from the UV sensor cable into terminal 2 (white terminal) of the terminal strip
in the fan/heater box.
10. Insert time delay relay into its socket and set the timer using the settings as shown in Figure 11 .
Figure 11 Timer Settings and Connections
Relay terminals:
1 = No Connection
2 = AC Neutral for Relay
3 = No Connection
4 = No Connection
5 = Jumper to 6
6 = Jumper to 5
7 = No Connection
8 = No Connection
9 = To Main Solenoids and V1 Input on Heater