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MODEL # LTD - 18
LTD Heater
Owner's
Manual
MANUAL # PNEG-595
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LTD HEATER CHECK LIST
9OK
_____ 1. All wire connections
_____ 2. Electrical connection visual inspection and
fastener tightness
_____ 3. Spark plug gap .125
_____ 4. Pipe train tightness and gas leaks
_____ 5. Flame sensor tight
_____ 6. Fuse in place, extra fuse provided
_____ 7. Time delay reset
_____ 8. Indicator light
_____ 9. Pressure gauge
_____ 10.Regulator adjusted
_____ 11.Shut off valve operates correctly
_____ 12.Vapor high limit
_____ 13.Unit cycles on to off
_____ 14.Heat rise even across transition
_____ 15.Unit cycles hi to lo (hi-lo only)
_____ 16. Mod valve holds temperature within 1 degree
(mod units only).
_____ 17. All decals and serial number tag
_____ 18. Aesthetic appearance
_____ 19. Manual
Tester Signature___________________________________
Date_________________________
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LTD HEATER OPERATING INSTRUCTIONS
TABLE OF CONTENTS
Warranty.......................................................................................................................4
Roof Warning, Operation & Safety...............................................................................5
Safety Alert Decals.......................................................................................................6
Standard Vane Axial Heater Installation.........................................................................7
Fuel Connection.....................................................................................................7
Heater Electrical Installation..................................................................................8
Second Heater Installation.....................................................................................8
Temperature Heater Specifications......................................................................10
Plenum Thermostat Mounting...............................................................................11
Transition Hi-Limit Installation...............................................................................11
Standard Vane Axial Heater Operation......................................................................12
Standard Heater Operation..................................................................................12
Hi-Lo Heater Operation.........................................................................................12
BTU's Per Gauge Pressure (PSI) Propane Models (Approximate)......................13
BTU's Per Gauge Pressure (PSI) Natural Gas Models (Approximate).................14
Adjusting The Vaporizor........................................................................................15
Standard Heater Troubleshooting Guide.....................................................................16
Standard Heater Wiring...............................................................................................17
Wiring Schematic..........................................................................................................18
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WARRANTY
THE GSI GROUP, INC. ("GSI") WARRANTS ALL PRODUCTS MANUFACTURED BY GSI TO BE FREE OF
DEFECTS IN MATERIAL AND WORKMANSHIP UNDER NORMAL USAGE AND CONDITIONS FOR A
PERIOD OF 12 MONTHS AFTER RETAIL SALE TO THE ORIGINAL END USER OF SUCH PRODUCTS.
GSI'S ONLY OBLIGATION IS, AND PURCHASER'S SOLE REMEDY SHALL BE FOR GSI, TO REPAIR OR
REPLACE, AT GSI'S OPTION AND EXPENSE, PRODUCTS THAT, IN GSI'S SOLE JUDGMENT, CON-
TAIN A MATERIAL DEFECT DUE TO MATERIALS OR WORKMANSHIP. ALL DELIVERY AND SHIPMENT
CHARGES TO AND FROM GSI'S FACTORY WILL BE PURCHASER'S RESPONSIBILITY. EXPENSES
INCURRED BY OR ON BEHALF OF THE PURCHASER WITHOUT PRIOR WRITTEN AUTHORIZATION
FROM AN AUTHORIZED EMPLOYEE OF GSI SHALL BE THE SOLE RESPONSIBILITY OF THE PURCHASER.
EXCEPT FOR THE ABOVE STATED EXPRESS LIMITED WARRANTIES, GSI MAKES NO WARRANTY
OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES OF MER-
CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE IN CONNECTION WITH (i) PROD-
UCT 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 PUR-
POSE, OR DESIGN OF SUCH PRODUCT OR PRODUCTS.
IN NO EVENT SHALL GSI BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL OR CONSEQUEN-
TIAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOSS OF ANTICIPATED PROFITS OR BENEFITS.
PURCHASER'S SOLE AND EXCLUSIVE REMEDY SHALL BE LIMITED TO THAT STATED ABOVE, WHICH
SHALL NOT EXCEED THE AMOUNT PAID FOR THE PRODUCT PURCHASED. THIS WARRANTY IS
NOT TRANSFERABLE AND APPLIES ONLY TO THE ORIGINAL PURCHASER. GSI SHALL HAVE NO
OBLIGATION OR RESPONSIBILITY FOR ANY REPRESENTATIVE OR WARRANTIES MADE BY OR ON
BEHALF OF ANY DEALER, AGENT OR DISTRIBUTOR OF GSI.
GSI ASSUMES NO RESPONSIBILITY FOR FIELD MODIFICATIONS OR ERECTION DEFECTS WHICH
CREATE STRUCTURAL OR STORAGE QUALITY PROBLEMS. MODIFICATIONS TO THE PRODUCT
NOT SPECIFICALLY COVERED BY THE CONTENTS OF THIS MANUAL WILL NULLIFY ANY PRODUCT
WARRANTY THAT MIGHT HAVE BEEN OTHERWISE AVAILABLE.
THE FOREGOING WARRANTY SHALL NOT COVER PRODUCTS OR PARTS WHICH HAVE BEEN
DAMAGED BY NEGLIGENT USE, MISUSE, ALTERATION OR ACCIDENT. THIS WARRANTY COVERS
ONLY PRODUCTS MANUFACTURED BY GSI. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES EXPRESS OR IMPLIED. GSI RESERVES THE RIGHT TO MAKE DESIGN OR
SPECIFICATION CHANGES AT ANY TIME.
PRIOR TO INSTALLATION, PURCHASER HAS THE RESPONSIBILITY TO RESEARCH AND COM-
PLY WITH ALL FEDERAL, STATE AND LOCAL CODES WHICH MAY APPLY TO THE LOCATION AND
INSTALLATION.
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ROOF WARNING, OPERATION & SAFETY
ROOF DAMAGE WARNING AND DISCLAIMER
GSI DOES NOT WARRANT ANY ROOF DAMAGE CAUSED
BY EXCESSIVE VACUUM OR INTERNAL PRESSURE
FROM FANS OR OTHER AIR MOVING SYSTEMS. AD-
EQUATE VENTILATION AND/OR "MAKEUP AIR" DEVICES
SHOULD BE PROVIDED FOR ALL POWERED AIR HAN-
DLING SYSTEMS. GSI DOES NOT RECOMMEND THE USE
OF DOWNWARD FLOW SYSTEMS (SUCTION). SEVERE
ROOF DAMAGE CAN RESULT FROM ANY BLOCKAGE OF
AIR PASSAGES. RUNNING FANS DURING HIGH HUMID-
ITY/COLD WEATHER CONDITIONS CAN CAUSE AIR EX-
HAUST OR INTAKE PORTS TO FREEZE.
Thank you for choosing a GSI/Air-
stream product. It is designed to
give excellent performance and
service for many years.
This manual describes the op-
eration of the GSI/Airstream LTD
Heater. Many models are avail-
able to accommodate low, medium
or high temperature grain condi-
tioning.
The symbol shown is used to call
your attention to instructions con-
cerning your personal safety.
Watch for this symbol; it points out
important safety precautions. It
means "ATTENTION", "WARN-
ING", "CAUTION", and "DANGER".
Read the message and be cau-
tious to the possibility of personal
injury or death.
HEATER OPERATION
The principal concern of The
GSI Group, Inc. ("GSI") is your
safety and the safety of others as-
sociated with grain handling equip-
ment. This manual is written to help
you understand safe operating pro-
cedures, and some of the problems
that may be encountered by the op-
erator or other personnel.
As owner and/or operator, it is
SAFETY ALERT SYMBOL
WARNING! BE ALERT!
Personnel operating or working around
electric fans should read this manual.
This manual must be delivered with the
equipment to its owner. Failure to read
this manual and its safety instructions is
a misuse of the equipment.
your responsibility to know what
requirements, hazards and pre-
cautions exist, and to inform all
personnel associated with the
equipment, or who are in the
heater area. Avoid any alterations
to the equipment. Such alterations
may produce a very dangerous
situation, where serious injury or
death may occur.
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The GSI Group, Inc. recom-
mends contacting your local power
company, and having a represen-
tative survey your installation so the
wiring is compatible with their sys-
tem, and adequate power is sup-
plied to your unit.
Safety decals should be read
and understood by all people in the
grain handling area. The rotating
blade, fire warning decals and volt-
age danger decal must be displayed
on the fan/heater can. The danger
decal, DC-552, should be present
on the inside bin door cover of the
two ring door, 24" porthole door
cover and the roof manway cover.
If a decal is damaged or is miss-
ing contact:
The GSI Group, Inc.
1004 E. Illinois St.
Assumption, IL 62510
217-226-4421
A free replacement will be sent to you.
SAFETY ALERT DECALS
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LTD HEATER INSTALLATION
FUEL CONNECTION
Important! Do not use propane tanks which have previously
been used for ammonia unless they have been purged ac-
cording to procedures of the National L. P. Association.
Be sure fuel supply system complies with all local codes
for L. P. gas installations.
PROPANE VAPOR MODELS
1. Propane vapor models are de-
signed to run directly off of sup-
ply tank or from a separate ex-
ternal vaporizer.
2. Run proper size line (see speci-
fications) to pipe train on heater.
Have a qualified gas service
person inspect installation to be
sure everything is installed ac-
cording to local codes and ordi-
nances.
3. After installation is complete
check all connections for leaks.
DO NOT USE FLAME FOR
LEAK TESTING. (See above for
other precautions.)
NATURAL GAS MODELS
1. Natural gas models are similar
to vapor models, but have a
larger orifice to accommodate
lower pressure sometimes
found with natural gas.
2. Run proper size line (see speci-
fications) to pipe train on heater.
Have a qualified gas service
man inspect installation to be
sure everything is installed ac-
cording to local codes and ordi-
nances.
3. After installation is complete
check all connections for leaks.
DO NOT USE FLAME FOR
LEAK TESTING. (See above for
other precautions.)
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INSTALLING THE LTD HEATER WITH LTD MOUNTING BRACKETS
THESE INSTRUCTIONS ARE
FOR HEATER INSTALLATION
ON FAN UNITS WITH 230V
MOTORS.
BE SURE POWER IS
DISCONNECTED AND LOCKED
OUT BEFORE INSTALLATION!
FAILURE TO DO SO MAY CAUSE
SERIOUS INJURY OR DEATH.
LTD HEATER INSTALLATION
IMPORTANT!
Note: Heater Direction
Figure 1: Make sure the LTD Heater is positioned in the right direction.
1. Place heater on the ground next
to the inlet of the centrifugal fan.
The LTD heater is designed to
mount upwind. Be sure airflow
decal is pointing towards the in-
let of the fan.
2. Bolt LTD mounting brackets to
each of the six holes in the
downstream angle ring of the
heater. Snug tighten bolts such
that they can still pivot with little
force applied. See chart for slots
to bolt through in bracket.
Slot
End
Middle
Fan Inlet Bolt Circle
31" to 35"
Less than 31"
Figure 2: The six(6) mounting brackets positioned on the LTD Heater.
six(6) bolts and bolt the remain-
ing six(6) brackets to fan using
nuts removed. It may be neces-
sary to remount the fan grill
guard so mounting brackets will
seat properly. Slots to use for
fan mounting bolts are below.
3. Pivot brackets so they are nearly
radial from center of heater.
Stand behind heater and deter
mine which bolts on fan inlet
best line up with the brackets.
Remove the nuts from those
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Slot
End
Middle
Inner
Fan Inlet Bolt Circle
35"
31 3/4"
29"
Figure 3: The LTD Heater brackets
pivoted so they are radial from the
center of the heater.