GSi FFI SCR User manual

PNEG-1712
FFI SCR Replacement Kit
Installation Manual
PNEG-1712
Date: 05-22-15

2 PNEG-1712 FFI SCR Replacement Kit Instructions
All information, illustrations, photos and specifications in this manual are based on the latest
information available at the time of publication. The right is reserved to make changes at any
time without notice.

Table of Contents
PNEG-1712 FFI SCR Replacement Kit Instructions 3
Contents
Chapter 1 Introduction .......................................................................................................................................... 4
Read these Instructions before Installation and Operation ................................................................... 4
Chapter 2 Installation ............................................................................................................................................ 6
Replacing the Woods Board ................................................................................................................. 6
Vari-Trol Power Supply ......................................................................................................................... 7
Non Vari-Trol Power Supply .................................................................................................................. 8
Chapter 3 Setup Parameters ................................................................................................................................. 9
Maximum Potentiometer Adjustment .................................................................................................... 9
Minimum Potentiometer Adjustment ..................................................................................................... 9
Vari-Trol Calibration ............................................................................................................................ 10
Chapter 4 Warranty .............................................................................................................................................. 11

4 PNEG-1712 FFI SCR Replacement Kit Instructions
1. Introduction
Read these Instructions before Installation and Operation
FFI SCR Replacement Control Kit
The FFI SCR Replacement Control Kit is a service replacement package for the discontinued woods SCR
control boards installed on Farm Fans dryers from 1990 to 2007.
The FFI SCR Replacement Kit supersedes previous SCR kits and contains the necessary parts for
replacing the following SCR control boards:
1. 415-3621-0 SCR CONTROL 1 HP-WOODS W/54
2. 415-4563-3 SCR CONTROL 1/3 HP-WOODS W/54
3. 415-3019-7 SCR CONTROL 3/4 HP-WOODS
4. 415-2302-8 SCR CONTROL 3/4 HP-WOODS W/54
5. SCR-003 SCR CONTROL KIT WOODS
6. 056-1580-2 SCR MOTOR CONTROL-WOODS
Beginning in 1990, the woods SCR board was installed on all new CMS-H, CMS-J and M-Series dryers.
As of July, 1992, the woods SCR board was installed on all new CF/AB and CF/SA series dryers.
SCR All HP with Vari-Trol (D04-0551) SCR All HP without Vari-Trol (D04-0552)
CAUTION
To reduce the risk of electrical shock or damage to electrical components, turn
OFF and lock out the main power supply before performing any service or
maintenance work on the dryer.
Part # Description Qty U/M
098-1026-8 Wrapper, Nylon TY - 3-5/8" 1EA
D03-0013-BRK DIN Rail Mount Single Comp 3.9" 1 EA
D03-0854 Minarik SCR Drive 1EA
FH-6999 Insulator, 16 Gauge Insulator Crimp 1 EA
HH-1462 Nut, 16 Gauge Wire 2EA
PNEG-1712 FFI SCR Replacement Kit 1 EA
WR-16BLK Wire, 16 Gauge Stranded MTW Black 4FT
WR-18RED Wire, 18 Gauge Red Stranded
120-1032-8 3FT
WR-18WHT Wire, 18 Gauge White Stranded 3FT
WR-18YLW Wire, 18 Gauge Yellow Stranded 3 FT
GT3-0971 24 Volt Power Supply 1
70-0064 3 Amp Time Delay Fuse 2
E300-1003 5 Amp Fuse TD 2
GT3-1065 8 Amp Fuse MDA 2
Part # Description Qty U/M
098-1026-8 Wrapper, Nylon TY - 3-5/8" 1EA
D03-0013-BRK DIN Rail Mount Single Comp 3.9" 1 EA
D03-0854 Minarik SCR Drive 1EA
FH-6999 Insulator, 16 Gauge Insulator Crimp 1 EA
HH-1462 Nut, 16 Gauge Wire 2EA
PNEG-1712 FFI SCR Replacement Kit 1 EA
WR-16BLK Wire, 16 Gauge Stranded MTW Black 4FT
WR-18RED Wire, 18 Gauge Red Stranded
120-1032-8 3FT
WR-18WHT Wire, 18 Gauge White Stranded 3FT
WR-18YLW Wire, 18 Gauge Yellow Stranded 3 FT
D03-0805 Touch Control, 12 VDC Power Supply 1EA
70-0064 3 Amp Time Delay Fuse 2
E300-1003 5 Amp Fuse TD 2
GT3-1065 8 Amp Fuse MDA 2

1. Introduction
PNEG-1712 FFI SCR Replacement Kit Instructions 5
Figure 1A FFI SCR Replacement Board
Figure 1B Woods SCR Board (Discontinued)

6 PNEG-1712 FFI SCR Replacement Kit Instructions
2. Installation
Replacing the Woods Board
1. Disconnect the power to the circuit.
2. For ease of re-connection, record the colors and terminal numbers of all wires leading to the woods
board. Disconnect wiring and remove board. Mount the new SCR board in approximately the same
location, oriented as shown in Figure 1A on Page 5. Note that additional holes must be drilled into
the mounting surface using a 9/64" drill bit.
3. Mount the DIN Rail (D03-0013-BRK) next to the new SCR board if possible using a 9/64" drill bit.
Use the self-tapping screws to secure the DIN Rail to the panel. Snap the power supply (GT3-0971
or D03-0805) onto the DIN Rail.
4. Reconnect the wires as follows:
Previous Woods Terminal New SCR Terminal Previous Woods Terminal New SCR Terminal
L1 L1 1S3
L2 L2 (230) 2 S2
F1 F1 3S1
F2 F2 6 B1
A1 A1 7B3
A2 A2

2. Installation
PNEG-1712 FFI SCR Replacement Kit Instructions 7
Vari-Trol Power Supply
Install power supply on DIN Rail.
1. Connect 24 VDC (+) to wire 54
2. Connect 24 VDC (-) to SCR terminal S1
3. Connect L1 to wire 27
4. Connect N to wire 2
5. Connect G to ground
NOTE: It is very important on Vari-Trol systems to remove the jumper (if present) on the back of the
Honeywell moisture controller between terminals 4 and ground. Failure to do so will result in
premature failure of components.
Figure 2A Wiring Diagram for Dryers with Vari-Trol (has 54 Wire and Autorange Module)

2. Installation
8 PNEG-1712 FFI SCR Replacement Kit Instructions
Non Vari-Trol Power Supply
Install power supply on DIN Rail.
1. Connect 12 VDC (+) to SCR terminal S3
2. Connect 12 VDC (-) to SCR terminal S1
3. Connect L1 to wire 27
4. Connect N to wire 2
5. Connect G to ground
Figure 2B Wiring Diagram for Dryers with Non Vari-Trol (no 54 Wire)

PNEG-1712 FFI SCR Replacement Kit Instructions 9
3. Setup Parameters
Maximum Potentiometer Adjustment
With dryer unload circuit energized, set the SCR speed control knob on the ASC panel to 100%. Using
a small blade screwdriver, adjust the maximum potentiometer to obtain 180 VDC across the DC motor
armature terminals A+ and A- on the new SCR board. (NOTE: Some early M-Series dryers were designed
to operate with a 175 VDC armature voltage. Consult the factory if there is any question regarding these
early models.)
Minimum Potentiometer Adjustment
Set the SCR speed control knob on the ASC panel at the 10% setting. Adjust the minimum potentiometer
to obtain 18 VDC across the DC motor armature terminal A+ and A-.
Recheck the maximum potentiometer setting and readjust if necessary. Repeatand readjust the minimum
potentiometer if necessary. Rechecking the maximum and minimum potentiometer settings once should
be sufficient.

3. Setup Parameters
10 PNEG-1712 FFI SCR Replacement Kit Instructions
Vari-Trol Calibration
“OUT HI” will need to be set to 80. Refer to Figure 3A for instructions.
Figure 3A