Desa Tech TC100 Owner's Manual
NATURAL GAS CONSTRUCTION CONVECTION HEATER
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OWNER’S MANUAL
MODEL TC100
100,000 BTU/HR
IMPORTANT: Read and understand this manual before
assembling, starting or servicing heater. Improper use
of heater can cause serious injury. Keep this manual for
future reference.
GENERAL HAZARD WARNING:
Failure to comply with the precautions and instructions
provided with this heater, can result in death, serious
bodily injury and property loss or damage from hazards
of re, explosion, burn, asphyxiation, carbon monoxide
poisoning and/or electrical shock.
Only persons who can understand and follow the instruc-
tions should use or service this heater.
If you need assistance or heater information such as an in-
structions manual, labels, etc. contact the manufacturer.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For more information, visit www.desatech.com
Safety Information ............................................... 2
Unpacking............................................................ 3
Theory of Operation............................................. 3
Ventilation ............................................................ 3
Product Identication ........................................... 3
Natural Gas Supply ............................................. 3
Installation ........................................................... 4
Operation ............................................................. 5
Storage ................................................................ 5
TABLE OF CONTENTS
Maintenance ........................................................ 5
Troubleshooting ................................................... 6
Specications ...................................................... 7
Replacement Parts .............................................. 7
Technical Services ............................................... 7
Accessories ......................................................... 7
Illustrated Parts Breakdown and Parts List.......... 8
Warranty and Repair Service ............................ 10
SAFETy INFORMATION
WARNING: This product
contains and/or generates
chemicals known to the State
of California to cause cancer or
birth defects or other reproductive harm.
WARNING: Fire, burn inhala-
tion and explosion hazard. Keep
solid combustibles, such as building materials, paper or cardboard,
a safe distance away from the
heater as recommended by the
instructions. Never use the heater
in spaces which do or may contain
volatile or airborne combustibles
or products such as gasoline, solvents, paint thinner, dust particles
or unknown chemicals.
WARNING: Not for home or
recreational vehicle use.
The heater is designed for use as a construction
heater in accordance with ANSI Z83.7•CGA 2.14.
Other standards govern the use of fuel gases and
heating products for specic uses. Your local authority can advise you about these. The primary purpose
of construction heaters is to provide temporary
heating of buildings under construction, alteration
or repair. Properly used, the heater provides safe
economical heating. Products of combustion are
vented into the area being heated.
We cannot foresee every use which may be made
of our heaters. CHECK WITH YOUR LOCAL
FIRE SAFETY AUTHORITY IF YOU HAVE
QUESTIONS ABOUT HEATER USE.
Other standards govern the use of fuel gases and
heat producing products for specic uses. Your
local authorities can advise you about these.
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Carbon Monoxide Poisoning: Some people are
more affected by carbon monoxide than others.
Early signs of carbon monoxide poisoning re-
semble the u, with headaches, dizziness and/or
nausea. If you have these signs, the heater may not
be working properly. Get fresh air at once! Check
for proper ventilation and have heater serviced.
Natural Gas: Natural gas has a distinctive odor.
This odor helps you detect a natural gas leak.
However, the odor may fade. Natural gas may be
present even though no odor exists.
Make certain you read and understand all warnings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
1. Install and use heater with care. Follow all local
ordinances and codes. In the absence of local
ordinances and codes, refer to the Standard for
Storage and Handling of Liqueed Petroleum
Gas, ANSI/NFPA 58 Natural Gas Installation
Code, CAN/CGA B149.2. This instructs on the
safe storage and handling of propane gases.
2. This product has been approved for use in the
Commonwealth of Massachusetts.
3. Use only natural gas. Do not attempt to use
with propane gas.
4. Provide adequate ventilation. Before using
heater, provide at least a 3 ft2 (0.28 m2) opening of fresh, outside air.
5.
For indoor use only. Do not use heater outdoors.
6. Keep heater away from strong drafts, wind,
water spray, rain or dripping water.
7. Do not use heater in occupied dwellings or in
living or sleeping quarters.
8. Do not use heater in a basement or below
ground level.
9. Keep appliance area clear and free from combustible materials, gasoline, paint thinner and
other ammable vapors and liquids. Dust is
combustible. Do not use heater in areas with
high dust content.
10. Minimum heater clearances from combustibles:
sides 3 feet (91 cm), top 6 feet (1.83 m).
11. Keep heater at least 6 feet (1.83 m) from
propane tank(s).
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SAFETy INFORMATION
Continued
12. Use only the factory preset regulator provided
with the heater.
13. Check heater for damage before each use. Do
not use a damaged heater.
14. Do not alter heater. Keep heater in its original
state.
15. Do not use heater if altered.
16. Locate heater on stable and level surface if
heater is hot or operating.
17. Not intended for use on nished oors.
18. Never block air inlet (bottom of shell) or air
outlet (around top of shell) of heater.
19. Do not leave heater unattended.
20. Keep children and animals away from
heater.
21. Never move, handle or service a hot or operat-
ing heater. Severe burns may result. You must
wait 15 minutes after turning heater off.
22. To prevent injury, wear gloves when handling
heater.
23. Never attach duct work to heater.
24. Turn off gas supply to heater when not in use.
25. Use only original replacement parts. This
heater must use design-specific parts. Do
not substitute or use generic parts. Improper
replacement parts could cause serious or fatal
injuries.
UNpACkING
1. Remove all packing items applied to heater
for shipment. Keep plastic cover caps for
storage.
2. Remove all items from carton.
3. Check all items for shipping damage. If heater
is damaged, promptly inform dealer where you
bought heater.
VENTILATION
WARNING: Provide at least a
3 square foot (0.28 m2) opening of
fresh, outside air while running
heater. If proper fresh, outside
air ventilation is not provided,
carbon monoxide poisoning
can occur. Provide proper fresh,
outside air ventilation before
running heater.
pRODUCT
IDENTIFICATION
Outer
Shell
Ignitor
Button
Control
Knob Button
Figure 1 - 100,000 Btu Model Heater
Regulator
Heater
Inlet
THEORy OF OpERATION
The Fuel System: The gas supply attaches to the
heater by a minimum 3/4" i.d. hose or exible
connector. User must supply hose or exible con-
nector. The length should be no more than 10 feet
long. The natural gas moves through the regulator
and out the nozzle.
The Ignition System: The piezo ignitor lights the
pilot. The pilot lights the main burner.
The Automatic Control System: This system causes
the heater to shut down if the ame goes out.
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NATURAL GAS SUppLy
You must provide the natural gas supply and the
connections to the heater.
The natural gas supply must have a capacity of 100
scfh at 6" water column to 14" water column.
Consult your natural gas supplier for proper sizing
of the natural gas supply lines.
Follow all local ordinances and codes. In the ab-
sence of local ordinances and codes, refer to the
National Fuel Gas Code Handbook, NFPA54/ANS
Z223.1 and the Natural Gas Installation Code,
CAN/CGA B149.2.
INSTALLATION
CONNECTING TO GAS SUPPLY
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2. They are needed to safely operate this heater. Follow all local
codes when using this heater.
CAUTION: Never ignite and/
or run this heater unless the
shells are fully extended and
locked into position.
OUTER SHELL
IMPORTANT: When the heater is rst removed
from carton, the outer shell is in the down position. Protect hands before lifting outer shell. Never
grasp bare metal without hand protection.
1. Care must be taken to protect hands during this
step. Lift outer shell straight up as shown in Figure 2, until all three clips engage slots in lower
shell. Screw holes will line up at this point.
2. Lock clips into place with 3 screws (1 per clip)
as shown in Figure 2. The heater must not be
operated unless the outer shell is properly
extended and fully locked into place.
Outer
Shell
WARNING: Test all gas piping
and connections for leaks after
installation or servicing. Never
use an open ame to check for
a leak. Apply a mixture of liquid
soap and water to all joints.
Bubbles forming show a leak.
Correct all leaks at once.
1. Provide natural gas supply system.
2. Install plumbing to a low pressure natural gas
source. The source must be regulated to 1/2 psi
maximum 3/4" i.d. hose or exible connector
not over 10 feet long.
3. Install regulator to pipe inlet. Use thread
sealing compound on connections. Tighten
with a wrench holding pipe to prevent it from
rotating.
3. Connect hose to regulator inlet. Tighten with
a wrench
4. Open natural gas supply valve slowly.
5. Check all connections for leaks. Apply mixture of liquid soap and water to gas joints.
Bubbles forming show a leak that must be
corrected.
6. Close natural gas supply valve.
Clip in Slot
of Lower
Shell
Figure 2 - Lifting Outer Shell
1 Screw
per Clip
Figure 3 - Hose and Valve Inlet
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Valve Inlet
Hose
118535-01A4
OpERATION
ON
FROM “PILOT” POSITION
SLIGHT PUSH TO
TURN OFF
FULL PUSH TO
LIGHT
OFF
PILOT
OFFON
PILOT
OFFON
ON
FROM “PILOT” POSITION
SLIGHT PUSH TO
TURN OFF
FULL PUSH TO
LIGHT
OFF
PILOT
OFFON
ON
FROM “PILOT” POSITION
SLIGHT PUSH TO
TURN OFF
FULL PUSH TO
LIGHT
OFF
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
2. They are needed to safely operate this heater. Follow all local
codes when using this heater.
TO START HEATER
1. Follow all installation, ventilation, and safety
information.
2. Locate heater on stable and level surface. Make
sure strong drafts do not blow on heater.
3. Open gas supply slowly.
4. Turn control valve knob 1/4 turn to left to
PILOT position (see Figure 4).
5. Push in and hold control valve knob while
pushing red piezo ignitor button. Ignitor
button may have to be pushed again (3 to 8
times) until pilot lights. Note: Hose may be
lled with air. If so, allow 20 seconds for gas
to reach pilot before pushing ignitor button.
6. After pilot lights, keep control valve knob depressed for at least 30 seconds, then release.
7. If pilot light goes out, repeat steps 4 through 6.
8. When pilot remains lit, start heater by slowly
turning control valve knob 1/4 turn to left to
ON position (see Figure 5).
Figure 4 - PILOT
Position
TO STOP HEATER
1. Close valve on gas supply.
2. Turn control valve knob 1/4 turn to right to
PILOT position. Slightly push in knob and
turn 1/4 turn to right to OFF position (see
Figure 6).
Figure 5 - ON
Position
TO RESTART HEATER
1. Wait ve minutes after stopping heater.
2. Restart heater by following steps under To
Start Heater.
STORAGE
CAUTION: Be careful not to
locate ngers in groves on side
of heater, in vent holes or on
bottom of shell when collapsing shell to the down position.
Severe cuts may occur. Always
wear hand protection when
grasping bare metal.
1. The heater should be inspected before each use
and at least annually by a qualied person.
2.
Turn off gas supply when the heater is not in use.
3. Heater is to be stored indoors. The connection between gas supply and heater must be
disconnected.
4. Store in a dry, clean and safe place.
MAINTENANCE
WARNING: Never attempt
to service heater while it is
connected to gas supply, operating or hot. Severe burns can
occur.
1. Keep heater clean.
2. Inspect heater before each use. Check connections for leaks. Apply mixture of liquid soap
and water to connections. Bubbles forming
show a leak that must be corrected. Correct
all leaks at once.
3. Inspect hose assembly before each use. If hose
is highly worn or cut, replace.
4. Have heater inspected yearly by a qualied
service person.
118535-01A 5
Figure 6 - OFF Position
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TROUBLESHOOTING
WARNING: Never service heater while it is plugged in, connected
to gas supply, operating or hot. Severe burns and electrical shock
can occur.
OBSERVED FAULT
Pilot fails to light
Pilot lights but goes out when
control valve knob is released
Maximum burn rate is low
POSSIBLE CAUSE
1. Nat ural gas supply val ve
closed on gas supply
2. Air in gas line
3. Blockage in pilot orice
4. Piezo ignition system not
sparking
1. Not enough warm-up time
2. Low gas pressure
3. Thermocouple loose or needs
to be replaced
4. Control valve needs to be
replaced
1. Main burner valve not fully
open
2. Plugged gas orices
3. Low gas pressure
REMEDY
1. Open natural gas supply valve
slowly
2. Allow several minutes to
purge air with automatic control valve button depressed
3. Replace pilot orice
4. Adjust ignitor electrode gap
to 0.12". Check wire lead for
damage. Replace piezo ignitor
and/or ignitor electrode as
necessary
1. Relight, hold automatic control
valve button in 45 seconds
2. Check natural gas for proper
gas supply
3. Tighten connection or replace
thermocouple
4. Replace control valve
1. Fully open main burner valve
by turning the valve handle
towards ON position until it
stops
2. Replace gas orice
3. Consult natural gas supplier;
check regulator output
Soot forming inside heater, ame
100% yellow
Flames are extremely high. Coming out of louvers
1. Main burner valve not fully
open
2. Low gas pressure
1. Unit was connected to LP gas
instead of natural gas.
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1. Adjust main burner valve
slowly towards ON position
2. Consult natural gas supplier
1. Check gas source, replace with
natural gas supply
118535-01A6
SpECIFICATIONS
•
Rating: 100,000 Btu/hr ( kW)
• Type of Gas: Natural
• Ignition: Piezo Ignitor
• Fuel Consumption: 97 Feet3/Hour
• Gas Supply Pressure to regulator:
Maximum - 1/2 psi, Minimum - 6" w.c.
• Manifold Pressure: 3" w.c.
•
Minimum Ambient Temperature: 0° F (-17.8° C)
• Weight: 23 lb
• Size (L x W x H): 16" x 16" x 29.5"
REpLACEMENT pARTS
WARNING: Use only original
replacement parts. This heater
must use design-specic parts.
Do not substitute or use generic
parts. Improper replacement
parts could cause serious or fatal injuries. This will also protect
your warranty coverage for parts
replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If they
can’t supply original replacement part(s), either
contact your nearest Parts Central or call DESA
Heating Products’ Technical Service Department
at 1-866-672-6040.
When calling DESA Heating Products, have ready
• your name
• your address
• model number of your heater
• how heater was malfunctioning
• purchase date
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
either contact your nearest Parts Central (listed in
Authorized Service Center booklet) or call DESA
Heating Products at 1-866-672-6040 for referral
information.
When calling DESA Heating Products, have ready
• model number of your heater
• the replacement part number
TECHNICAL SERVICES
You may have further questions about this heater.
If so, contact DESA Heating Products’ Technical
Service Department at 1-866-672-6040. When
calling, please have your model and serial numbers
of your heater ready.
You can also visit DESA Heating Products’ Technical Service web site at www.desatech.com.
ACCESSORIES
Purchase heater accessories and parts from your
nearest dealer or service center. If they can not
supply an accessory or part, either contact your
nearest Parts Central (listed in the separate Au-
thorized Service Center booklet) or call DESA
Heating Products’ at 1-866-672-6040. You can
also write to the address listed on the back page
of this manual.
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MODEL TC100
4
16
18
27
19
17
5
8
9
10
11
6
7
12
13
14
1
2
3
25
26
24
23
21
23
20
22
ILLUSTRATED pARTS BREAkDOWN
www.desatech.com
118535-01A8
pARTS LIST
MODEL TC100
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 7 of this manual.
KEY
NO. PART NO. DESCRIPTION QTY.
1 113785-01 Cap 1
2 114178-01 Upper Shell 1
3 113821-01 Lower Shell 1
4 113777-01 Burner Ring Assembly 1
5 113778-01 Ring Shield 1
6 102445-01 Piezo Ignitor Kit 1
7 ** Base 1
8 100898-01 Thermocouple Clip Thin Hex Nut 2
9 106187-02 Thermocouple 1
10 113797-01 Ignitor Electrode 1
11 097163-08 Pilot Assembly 1
12 113783-01 Pilot Mounting Bracket 1
13 115364-03 Pilot Orice 1
14 113801-01 Elbow Fitting, 1/8 FPT x 1/4 CPSN 1
15 118538-01 Pilot Fuel Tube 1
16 118541-01 Orice, LP 1
17 113782-01 Orice Adapter 1
18 113796-01 Retaining Ring 1
19 118603-01 Pilot Fuel Tube Kit 1
20 104115-01 1/2 NPT to 1/4 NPT Reducer Bushing 1
21 104119-01 Control Valve 1
22 118540-01 1/8 NPT to 1/4 Tube Fitting 1
23 118537-01 Valve Bracket 2
24 118539-01 Pipe Nipple 1
25 103936-01 Regulator 1
26 103401-01 1/2 NPT to 1/2 45° Male Flare Connector 1
27 119689-01 Fuel Tube Kit 1
117069-05 Tradename Decal 1
113808-10 Hang Tag (English) 1
113808-12 Hang Tag (Spanish) 1
113808-11 Hang Tag (French) 1
113805-06 Installation Decal (English) 1
113805-08 Installation Decal (Spanish) 1
113805-07 Installation Decal (French) 1
113802-22 Model Decal 1
**Not a eld replaceable part
PARTS AVAILABLE - NOT SHOWN
118535-01A 9
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WARRANTy AND REpAIR SERVICE
kEEp THIS WARRANTy
Model
Serial No.
Date of Purchase
LIMITED WARRANTIES FOR NEW AND FACTORy
RECONDITIONED pRODUCTS
New Products: DESA Heating Products warrants this heater and any parts thereof, to be free of defects in materials
and workmanship for one (1) year from the date of first purchase, when operated and maintained in accordance
with the manufacturer's instructions. These warranties are extended only to the original retail purchaser, when
proof of purchase is provided.
Factory Reconditioned Heaters: DESA Heating Products warrants this factory reconditioned heater and any parts
thereof, to be free of defects in materials and workmanship for thirty (30) days from the date of first purchase,
when operated and maintained in accordance with the manufacturer's instructions. These warranties are extended
only to the original retail purchaser, when proof of purchase is provided.
These warranties cover only the cost of parts and labor required to restore the product to proper operating condition.
Transportation and incidental costs associated with warranty repairs are not reimbursable under this warranty.
Warranty service is available only through authorized dealers and service centers.
This warranty does not cover defects resulting from misuse, abuse, negligence, accidents, lack of proper maintenance,
normal wear, alteration, modification, tampering, contaminated fuels, repair using improper parts or repair by anyone
other than an authorized dealer or service center. Routine maintenance is the responsibility of the owner.
THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED
OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
DESA Heating Products assumes no responsibility for indirect, incidental or consequential damages. Some states
do not allow the exclusion or limitation of incidental or consequential damages or limitations or exclusions may
not apply to you. This limited warranty gives you specific legal rights and you may also have other rights which
vary from province to province.
WARRANTy SERVICE
Should your heater require service, return it to your nearest authorized service center. Proof of purchase must be
presented with the heater. The heater will be inspected. A defect may be caused by faulty materials or workmanship.
If so, DESA Heating Products will repair or replace the heater without charge.
REpAIR SERVICE
Return the heater to your nearest authorized service center. Each Service Center is independently owned and operated.
Repairs not covered by the warranty will be billed at standard prices. We reserve the right to amend these specifications at any time without notice.
Illustrated parts lists can be obtained free of charge. Send a self-addressed stamped envelope to the address listed
below. List the heater model number and the date located in the lower right corner of this page. A service manual
may be purchased from the address listed below. Send a check or money order for $5.00 (US) payable to DESA
Heating Products.
When writing for information regarding your heater, be sure to include the model number and serial number as shown
on the model plate.
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
ATTN: Customer Service Department
82 Akron Road
Toronto, Ontario M8W 1T2
(416) 255-5333
118535-01
Rev. A
06/06
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