Grain Systems PNEG-1927 - Manual

Date: 03-07-2013 PNEG-1927
Instructions
1004 East Illinois Street • Assumption, IL 62510 • 1-217-226-4421
PNEG-1927
Printed in the U.S.A.
Copyright © 2013 by GSI Group
www.gsiag.com
Page 1 of 4
CN-304803
Flame Probe Kit using HF-7318-1
History of the Flame Probe
The HF-7318-1 supersedes part numbers HF-7318, HF-7100 and HF-7062.
HF-7062 burner board was used before 1991 and used a flame switch to detect flame.
HF-7100 burner board replaced the HF-7062 and was used between 1991 and 1996 and also used a
flame switch to detect flame.
HF-7318 burner board replace the HF-7100 and was used between 1996 and late 2012. It utilized a flame
sensor (flame rectification) which had no switching capabilities but rather induced a voltage on the flame
sensor to detect current changes in the voltage that was applied.
HF-7318-1 was introduced in late 2012 and is in current production. It contains a minor update to the circuit
which made it resistant to false flame detection in certain situations.
HF-7275 flame box was used as an added feature to customers using a HF-7100 or a HF- 7062 board.
By adding a HF-7275 to the HF-7100 or a HF-7062 burner circuit board it allowed the customer to use
flame sensor instead of the flame switch which had a high failure rate when compared to the flame sensor.
The HF-7100’s were made obsolete and replaced by the HF-7318 flame board in which had the flame
sensor capability already built in.
THH-4179 commonly called a flame sensor, flame rod or flame probe. It does not include any bracket and
if adding for the first time to the HF-7318 board it is recommended to get the kit (THH-7577) that contains
the bracket and hardware.
Replacing HF-7100 or HF-7062 heater board only
When using this kit to replace either a HF-7200 or HF-7062 you will need to replace the existing flame
switch with a flame sensor kit part number THH-7577. Use the wiring diagram contained in this document
as a reference when replacing the board and wiring in the newer style flame sensor. The HH-1088 reset
switch is no longer needed and will be removed from the circuit.
Replacing HF-7200 or HF-7062 with a HF-7275 Flame Probe Module
When using this kit to replace an existing HF-7275 Flame Probe Module you will need to replace the
burner circuit board which will be either a HF-7200 (1991–1996) or a HF-7062 (pre 1991) with the HF-
7318-1 board. The terminals between these boards are almost identical with exception to terminals 16,
17 and 18. 16 is no longer used and 17 and 18 are used for an air switch (if applicable). So place a jumper
between terminals 17 and 18 if no air switch is present.