GSi HF-8056 User manual

PNEG-1499
Digital High/Low Thermostat
Owner’s Manual
Model: HF-8056
PNEG-1499
Version: 2.1
Date: 11-04-16

2PNEG-1499 Digital High/Low Thermostat
Check List
1. All wire connections
2. Factory values programmed
a. Value 1 set to (F)
b. Value 2 or “S1” set to (100)
c. Value 3 or “DIF1” set to (5)
d. Value 4 set to (H1)
e. Value 5 or “S2” set to (130)
f. Value 6 or “DIF2” set to (5)
g. Value 7 set to (H2)
3. All items included in packaging.
4. Safety decal installed on side of thermostat
5. Aesthetic appearance
6. Manual
7. Vendor Instruction Sheet
Tester Signature:______________________________
Date:______________________________
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-1499 Digital High/Low Thermostat 3
Contents
Chapter 1 Safety ..................................................................................................................................................... 4
Safety Guidelines .................................................................................................................................. 4
Cautionary Symbols Definitions ............................................................................................................ 5
Safety Cautions ..................................................................................................................................... 6
Safety Sign-Off Sheet ........................................................................................................................... 8
Chapter 2 Safety Decals ........................................................................................................................................ 9
Chapter 3 Installation Instructions ..................................................................................................................... 10
Chapter 4 Electrical Connection ......................................................................................................................... 11
Thermostat Connection to Standard Heater Control ........................................................................... 11
Thermostat Connection to Deluxe Heater Control .............................................................................. 13
Thermostat Connection to Canadian Certified Bin Heaters ................................................................ 14
Chapter 5 Programming ...................................................................................................................................... 15
Programming Set Point Values ........................................................................................................... 15
Chapter 6 Parts List ............................................................................................................................................. 16
Thermostat Assembly High-Low 2 Stage Digital (HF-8056) ............................................................... 16
Chapter 7 Appendix ............................................................................................................................................. 17
Troubleshooting Error Messages ........................................................................................................ 17
Chapter 8 Warranty .............................................................................................................................................. 19

4PNEG-1499 Digital High/Low Thermostat
1. Safety
Safety Guidelines
Safety guidelines are general-to-specific safety rules that must be followed at all times. This manual
is written to help you understand safe operating procedures and problems that can be encountered
by the operator and other personnel when using this equipment. Save these safety guidelines for
future reference.
As owner or operator, you are responsible for understanding the requirements, hazards, and precautions
that exist and to inform others as required. Unqualified persons must stay out of the work area at all times.
Alterations must not be made to the equipment. Alterations can produce dangerous situations resulting in
SERIOUS INJURY or DEATH.
This equipment must be installed in accordance with the current installation codes and applicable
regulations,whichmustbecarefully followed inallcases. Authoritieshaving jurisdictionmustbe consulted
before installations are made.
When necessary, you must consider the installation location relative to electrical, fuel and water utilities.
Personnel operating or working around equipment must read this manual. This manual must be delivered
with equipment to its owner. Failure to read this manual and its safety instructions is a misuse of the
equipment. ST-0001-3

1. Safety
PNEG-1499 Digital High/Low Thermostat 5
Cautionary Symbols Definitions
Cautionary symbols appear in this manual and on product decals. The symbols alert the user of potential
safety hazards, prohibited activities and mandatory actions. To help you recognize this information, we
use the symbols that are defined below.
NOTICE
DANGER
WARNING
CAUTION
This symbol indicates an imminently hazardous situation
which, if not avoided, will result in serious injury or death.
This symbol indicates a potentially hazardous situation
which, if not avoided, can result in serious injury or death.
This symbol indicates a potentially hazardous situation which,
if not avoided, can result in minor or moderate injury.
This symbol is used to address practices not related to
personal injury.
This symbol indicates a general hazard.
This symbol indicates a prohibited activity.
This symbol indicates a mandatory action.
ST-0005-2

1. Safety
6PNEG-1499 Digital High/Low Thermostat
Safety Cautions
Use Personal Protective Equipment
Eye
Protection
Hearing
Protection
Hand
Protection
Head
Protection
Respiratory
Protection Foot
Protection
Fall
Protection
• Use appropriate personal protective equipment:
• Wear clothing appropriate to the job.
• Remove all jewelry.
• Tie long hair up and back.
ST-0004-1
ST-0025-3
Follow Safety Instructions
• Warning: If the information in the manual is not followed
exactly, a fire or explosion can result, causing property
damage, personal injury or loss of life.
• Carefully read all safety messages in this manual and safety
signs on your machine. Keep signs in good condition.
Replace missing or damaged safety signs. Be sure new
equipment components and repair parts include the current
safety signs. Replacement safety signs are available from
the manufacturer.
• Learn how to operate the machine and how to use controls
properly. Do not let anyone operate without instruction.
• If you do not understand any part of this manual or need
assistance, contact your dealer.
• Retain these instructions for future reference.

1. Safety
PNEG-1499 Digital High/Low Thermostat 7
Install and Operate Electrical Equipment Properly
• Electrical controls must be installed by a qualified electrician
and must meet the standards set by the National Electric Code,
Canadian Electrical Code, and all local and state codes.
• Lock-out power source before making adjustments, cleaning,
or maintaining equipment.
• Heater must be interlocked with an appropriately sized fan and
a thermostat must be installed for safe operation.
ST-0026-2
Prevent Roof Damage Due to Vacuum Pressure
• Roof damage can result from excessive vacuum or internal
pressure from fans or other air moving systems. The
manufacturer does not warrant this type of roof damage.
• Adequate ventilation or “makeup air” devices must be
provided for all powered air handling systems.
• The manufacturer does not recommend the use of downward
flow systems (suction).
• Severe roof damage can result from any blockage of air
passages.
• Operating fans during high humidity or cold weather conditions
can cause air exhaust or intake ports to freeze.
ST-0028-2
Exercise Caution When Drying Flammable Grains
• Be aware that some grains are highly flammable including but
not limited to rapeseed, canola, linseed, sunflower and milo.
• All grain and seed must be whole (minimal cracking or
crushing), clean, and dust free before drying.
• Avoid dust and chaff from being drawn into the fan and heater.
• To reduce risk of fire, keep the fan, heater, drying plenum and
ducts clean at all times.
• In the event of a fire (or suspected fire):
1. Shut down the entire dryer.
2. Turn OFF the fuel at the tank or supply valve.
3. Shut off and lock electrical power.
4. Evacuate the area.
5. Call the fire department.
ST-0032-1

1. Safety
8PNEG-1499 Digital High/Low Thermostat
Safety Sign-Off Sheet
Below is a sign-off sheet thatcan be used to verify that all personnel have read and understood the safety
instructions. This sign-off sheet is provided for your convenience and personal record keeping.
Date Employee Name Supervisor Name
ST-0007

PNEG-1499 Digital High/Low Thermostat 9
2. Safety Decals
The safety decals on your equipment are safety indicators which must be carefully read and understood
by all personnel involved in the installation, operation, service and maintenance of the equipment.
To replace a damaged or missing decal, contact us to receive a free replacement.
GSI Decals
1004 E. Illinois St.
Assumption, IL 62510
Tel: [phone]
Location Decal No. Decal Description
Thermostat DC-889 High Voltage
Danger Decal
DANGER
HIGH VOLTAGE
Will cause injury
or death.
Lockout power
before servicing.
DC-889
GSI Group Inc. 217-226-4421

10 PNEG-1499 Digital High/Low Thermostat
3. Installation Instructions
1. Mount the thermostat control on the right side of the fan transition. Locate a suitable location on
the bin wall that will allow the power cord to reach the heater and the control to be at eye level for
easy access.
2. Use the self-drilling screws (S-280) provided in the packaging to mount the control.
3. Run the power cord to the heater control box and make the connections as shown in the electrical
connection section on pages of this manual.
4. Mount the thermostat sensor 24" to the RIGHT of the transition. Use the sensor mounting plate
(HF-8058) as a template. This part has holes to match the hills of a 2.66" and 4.00" bin sidewall.
5. Use the screws (S-280) provided to mount the plate (HF-8058) on the sidewall. The large hole on the
plate should be centered on a valley of the bin corrugations. The plate should be mounted
approximately in the center of the plenum at the closest valley.
6. Use the hole in the mounting plate as a guide and drill a pilot hole. Once the pilot hole is drilled in the
sidewall, remove the mounting plate.
7. With the plate removed, enlarge the pilot hole to 1/2" diameter.
8. Attach the sensor of the thermostat to the mounting plate using the cord connector (HF-8057). The
sensor should extend approximately 3.00" beyond the plate. If not, then adjust the sensor length by
loosening the cord connector and moving the Sensor.
9. Insert the sensor into the 1/2" hole and re-attach the mounting plate using the screws (S-280).
10. Caulk the area around the mounting plate to seal any openings.
Figure 3A
Mount the sensor approximately 24"
to the RIGHT of the transition.

PNEG-1499 Digital High/Low Thermostat 11
4. Electrical Connection
Standard electrical safety practices and codes should be used when working with a heater. Refer to the
National Electric Code Standard Handbook by the National Fire Protection Association. A qualified
electrician should make all wiring installations.
Thermostat Connection to Standard Heater Control
Thermostat Connection to Standard Terminal Strip on Heaters Built
Prior to 2007.
1. Connect power cord to fan control box.
2. Connect the BLACK 120VAC power wire to terminal 2.
3. Connect the WHITE Neutral wire to terminal 8.
4. Connect the GREEN Stage 1 Common wire to terminal 6.
5. Connect the RED Stage 1 N.O. wire to the high/low light and cycle solenoid.
6. Connect the ORANGE Stage 2 Common wire to terminal 8.
7. Connect the BLUE Stage 2 N.O. wire to terminal 5.
Figure 4A Heaters Built Before 2007 (HF-7356 Flame Probe Checking Terminal Strip)
Always disconnect and lock out power before working on or around heater.

4. Electrical Connection
12 PNEG-1499 Digital High/Low Thermostat
Thermostat Connection to Standard Terminal Strip on Heaters Built
in 2007 to Present
1. Connect power cord to fan control box.
2. Connect the BLACK 120 VAC power wire to the ON/OFF switch. Make this connection so this switch
will also control the thermostat power.
3. Connect the WHITE Neutral wire to terminal 8.
4. Connect the GREEN Stage 1 Common wire to terminal 6.
5. Connect the RED Stage 1 N.O. wire to the high/low light and cycle solenoid.
6. Connect the ORANGE Stage 2 Common wire to terminal 1.
7. Connect the BLUE Stage 2 N.O. wire to high limit circuit on the incoming L1 power.
NOTE: Terminal strip may or may not be present in heater to connect wires in thermostat circuits.
Figure 4B Heaters Built in 2007 using HH-1089E Time Delay

4. Electrical Connection
PNEG-1499 Digital High/Low Thermostat 13
Thermostat Connection to Deluxe Heater Control
Thermostat Connection to HF-7318-1 Circuit Board
1. Connect power cord to fan control box.
2. Connect the BLACK 120 VAC power wire to terminal 20.
3. Connect the WHITE Neutral wire to terminal 19.
4. Connect the BLUE Stage 2 Common wire to terminal 15.
5. Connect the ORANGE Stage 2 N.O. wire to terminal 14.
6. Connect the RED Stage 1 N.O. wire to terminal 13.
7. Connect the GREEN Stage 1 Common wire to terminal 12.
Figure 4C

4. Electrical Connection
14 PNEG-1499 Digital High/Low Thermostat
Thermostat Connection to Canadian Certified Bin Heaters
1. Connect power cord to fan control box.
2. Connect BLACK 120 VAC power wire to Common on the Stage 2.
3. Connect the WHITE neutral to top side of terminal 8 coming from the white L2 neutral of the fenwal
(35-755216-111) burner control unit.
4. Connect the BLUE Stage 2 Common wire to one side of the bin thermostat connection terminal.
5. Connect the ORANGE Stage 2 N.O. wire to the other side of the thermostat connection terminal.
6. Connect the RED Stage 1 N.O. wire to one side of the high-low thermostat connection terminal.
7. Connect the GREEN Stage 1 Common wire to the other side of the high-low thermostat connection
terminal.
Figure 4D Thermostat Connection to Canadian Certified Bin Heaters
TRANSITION
HI-LIMIT
RESET
HF-7200
BIN THERMOSTAT
CONNECTION
ON/OFF
SWITCH
HF-8129
LOW TEMP
THERMOSTAT
VIS-LTT-CSA
FUSE
C-8719
NC NO
240 120 C
CNC NO C
STAGE 1
CYCLE
CONTACT
STAGE 2
HIGH-LIMIT
CONTACT
HF-8056 THERMOSTAT WIRING
LI
N
110 VOLT POWER
MUST BE INTERLOCKED
TO FAN CONTACTOR
HF-8012
HI-LOW SOLENOID
(HI-LOW UNITS ONLY)
HI-LOW
CONN
HF-8011
SECONDARY
SOLENOID
IGNITOR/
SPARK PLUG
HI-FIRE
LIGHT
VAPOR LIMITS OK
AIRFLOW OK
AIRFLOW FAULT LIGHT
COM
NO
1NC FENWEL
35-755216-111
TRIAL FOR IGNITION = 4 SEC
PREPURGE = 15 SEC
INTERPURGE = 15 SEC
TRIES FOR IGNITION = 3
S1 FLAME SENSOR
HS1 IGNITION 110 VAC
L1 110 VAC IN
TH THERMOSTAT
L2 NEUTRAL
V1 VALVE 110 VAC
V2 VALVE AC NEUTRAL
HS2 IGNITION NEUTRAL
B.GND BURNER GROUND
GRN
BLK
YEL
BRN
12345678
WHT
RED
GRY
BLU
FLAME
ROD
ORG
WHITE
BLACK
GREEN
RED
BLUE
ORANGE
POWER
LIGHT
1
2
2
3
IGNITION
TRANSFORMER
HH-1487
HF-8010
MAIN
SOLENOID
D03-1008
VAPOR HI-LIMIT
(LP UNITS ONLY)
AIRSWITCH
HH-7063

PNEG-1499 Digital High/Low Thermostat 15
5. Programming
Programming Set Point Values
Programming can be done anytime that the thermostat control is receiving power, even when the
heater is in operation.
1. Press the SET key once to set temperature scale mode. Use the UP or DOWN arrow key to toggle
between F for degrees Fahrenheit or C for degrees Celsius.
2. Press the SET key again to access the Stage 1 set point. “S1” will blink on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the set point to the desired temperature.
Cycle Set Point - If the plenum temperature increases above this point, the flame is reduced to
“Low Flame”.
3. Press the SET key again to access the Stage 1 differential. “DIF1” will blink on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the differential to the desired setting.
Temperature Differential 1 -Ifthe flameshutsoffbecausethetemperatureisgreaterthanthe Cycle
Set Point, then the temperature must fall below (Set Point minus Temperature Differential) for the
flame to come back ON. Heater will resume high flame operation.
4. Press the SET keyagain to access the Stage 1 heating. “H1” should appear on the screen. This must
read “H1” for the heater to operate correctly. If not, use the arrow keys to scroll through the values
until the screen reads “H1”.
5. Press the SET key again to access the Stage 2 setpoint. “S2” will blink on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the set point to the desired temperature.
High Limit Set Point - If the plenum temperature increases above this point, the flame is shut off -
“OFF Cycle”.
6. Press the SET key again to access Stage 2 differential. “DIF2” will flash on the screen. Press the
UP arrow to increase or the DOWN arrow to decrease the differential to the desired setting.
Temperature Differential 2 - If the flame shuts off because the temperature is greater than the High
Limit Set Point, then the temperature must fall below (Set Point minus Temperature Differential) for
the flame to come back ON. Heater will resume low flame operation.
7. Press the SET key again to access Stage 2 heating. “H2” should appear on the screen. This must
read “H2” for the heater to operate correctly. If not, use the arrow keys to scroll through the values
until the screen reads “H2”.
8. Press the SET key again. This will end programming.
The Thermostat Control will automatically end programming if no keys are pressed for a period of
30 seconds. Any settings that have been input to the control will be accepted at that point.
All control settings are retained in memory. Re-programming is not necessary after power outages
or disconnects unless different control settings are required.
The temperature differentials can be set from 1-30°. It is recommended that these temperature
differentials be set in the range of 10-15 °F for high temperature units and 1-5 °F for low
temperature units.

16 PNEG-1499 Digital High/Low Thermostat
6. Parts List
Thermostat Assembly High-Low 2 Stage Digital (HF-8056)
Ref # Part # Description Qty
1HF-8055 Thermostat, 2 Stage Digital 1
2 HF-8057 Connector, Straight Cord Grip Heyco #M3444 with Nylon Nut 1
3HF-8058 Sensor Mounting Plate 1
4 FH-1310 Connector, Cord Heyco #3231 2
5WR-186SEOW Cable, Wire CLM 18/6 SEOW Control 1
6 S-280 Screw, SDS #10-16 x 5/8" Hardware ZN 6
7FH-1309 Nut, Lock 1/2" with Pipe Threads 2
8 DC-889 Decal, Danger High Voltage 1
9HF-8117 Thermistor Sensor - Replacement Only 1

PNEG-1499 Digital High/Low Thermostat 17
7. Appendix
NOTE: Refer to Documentation provided by component manufacturer for troubleshooting and
maintenance of the Thermostat Control including sensor data.
Form No. 7515006-001 Rev A.
Troubleshooting Error Messages
E1 Appears when either the up arrow or down arrow key is pressed when not in the programming mode.
To Correct: If the E1 message appears even when no keys are being pressed, replace the control.
E2 Appears if the control settings are not properly stored in memory.
To Correct: Check all settings and correct if necessary.
EP
Appears when the probe is open, shorted or sensing a temperature that is out of range.
To Correct: Check to see if the temperature is out of range. If not, check the probe for damage by
comparing it to a known ambient temperature between -30°F and 220°F. Replace the probe if necessary.
EE Appears if the EEPROM data has been corrupted.
To Correct: This condition cannot be field repaired. Replace the control.
CL
Appears if calibration mode has been entered.
To Correct: Remove power to the control for at least 5 seconds. Re-apply power. If the CL message still
appears, replace the control.

18 PNEG-1499 Digital High/Low Thermostat
NOTES

PNEG-1499 Digital High/Low Thermostat 19
8. Warranty
GSI Group, LLC Limited Warranty
The GSI Group, LLC (“GSI”) warrants products which it manufactures to be free of defects in materials and workmanship
under normal usage and conditions for a period of 12 months after sale to the original end-user or if a foreign sale,
14 months from arrival at port of discharge, whichever is earlier. The end-user’s sole remedy (and GSI’s only obligation)
is to repair or replace, at GSI’s option and expense, products that in GSI’s judgment, contain a material defect in materials
or workmanship. Expenses incurred by or on behalf of the end-user without prior written authorization from the GSI
Warranty Group shall be the sole responsibility of the end-user.
Warranty Extensions:
The Limited Warranty period is extended for the following products:
GSI further warrants that the portable and tower dryer frame and basket, excluding all auger and auger drivecomponents,
shall be free from defects in materials for a period of time beginning on the twelfth (12th) month from the date of purchase
and continuing until the sixtieth (60th) month from the date of purchase (extended warranty period). During the extended
warranty period, GSI will replace the frame or basket components that prove to be defective under normal conditions
of use without charge, excluding the labor, transportation, and/or shipping costs incurred in the performance of this
extended warranty.
Conditions and Limitations:
THERE ARE NO WARRANTIES THAT EXTEND BEYOND THE LIMITED WARRANTY DESCRIPTION SET FORTH
ABOVE. SPECIFICALLY, GSI MAKES NO FURTHER WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING, WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE OR USE IN CONNECTION WITH: (I) PRODUCT MANUFACTURED OR SOLD BY GSI OR (II) ANY ADVICE,
INSTRUCTION, RECOMMENDATION OR SUGGESTION PROVIDED BY AN AGENT, REPRESENTATIVE OR
EMPLOYEE OF GSI REGARDING OR RELATED TO THE CONFIGURATION, INSTALLATION, LAYOUT, SUITABILITY
FOR A PARTICULAR PURPOSE, OR DESIGN OF SUCH PRODUCTS.
GSI shall not be liable for any direct, indirect, incidental or consequential damages, including, without limitation, loss of
anticipated profits or benefits. The sole and exclusive remedy is set forth in the Limited Warranty, which shall not exceed
the amount paid for the product purchased. This warranty is not transferable and applies only to the original end-user. GSI
shall have no obligation or responsibility for any representations or warranties made by or on behalf of any dealer, agent
or distributor.
GSI assumes no responsibility for claims resulting from construction defects or unauthorized modifications to products
which it manufactured. Modifications to products not specifically delineated in the manual accompanying the equipment at
initial sale will void the Limited Warranty.
This Limited Warranty shall not extend to products or parts which have been damaged by negligent use, misuse, alteration,
accident or which have been improperly/inadequately maintained. This Limited Warranty extends solely to products
manufactured by GSI.
Prior to installation, the end-user has the responsibility to comply with federal, state and local codes which apply to the
location and installation of products manufactured or sold by GSI.
Product Warranty Period
AP Fans and Flooring
Performer Series Direct Drive Fan Motor 3 Years * Warranty prorated from list price:
0 to 3 years - no cost to end-user
3 to 5 years - end-user pays 25%
5 to 7 years - end-user pays 50%
7 to 10 years - end-user pays 75%
** Warranty prorated from list price:
0 to 3 years - no cost to end-user
3 to 5 years - end-user pays 50%
† Motors, burner components
and moving parts not included.
Portable dryer screens included.
Tower dryer screens not included.
All Fiberglass Housings Lifetime
All Fiberglass Propellers Lifetime
AP and Cumberland Flex-Flo/Pan Feeding System Motors 2 Years
Cumberland
Feeding/Watering
Systems
Feeder System Pan Assemblies 5 Years **
Feed Tubes (1-3/4" and 2.00") 10 Years *
Centerless Augers 10 Years *
Watering Nipples 10 Years *
Grain Systems Grain Bin Structural Design 5 Years
Grain Systems
Farm Fans
Zimmerman
Portable and Tower Dryers 2 Years
Portable and Tower Dryer Frames and
Internal Infrastructure † 5 Years
9101239_1_CR_rev8.DOC (revised January 2014)

This equipment shall be installed in accordance with
the current installation codes and applicable
regulations, which should be carefully followed in all
cases. Authorities having jurisdiction should be
consulted before installations are made.
1004 E. Illinois St.
Assumption, IL 62510-0020
Phone: [phone]
Fax: [phone]
www.gsiag.com
Copyright © 2016 by The GSI Group, LLC
Printed in the USA CN-326943
GSI is a worldwide brand of AGCO Corporation.