Flagro THC-355DF Instruction Manual

OPERATING INSTRUCTIONS MANUAL
THC- 355DF
(Dual Fuel)
INDUSTRIAL / COMMERCIAL DIRECTIONAL SPACE HEATER
(OPERATOR MUST RETAIN FOR FUTURE REFERENCES)
Certified to / Certifié à ANSI std Z83.7 2000
Certified to / Certifié à CGA 2.14 M2000
Suitable for indoor or outdoor installation / Unvented / Unattended Type
26 Benfield Drive, St.Catharines, Ontario Canada L2S 3V5
(P) 905-685-4243 - (F) 905-685-0113
1ISSUE DATE: OCTOBER 2010

THC-350DF OPERATING INSTRUCTIONS MANUAL
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 FIRE, EXPLOSION,
BURN ASPHYXIATION, CARBON MONOXIDE
POISONING, AND / OR ELECTRICAL SHOCK
ONLY PERSONS WHO CAN UNDERSTAND AND
FOLLOW THE INSTRUCTIONS SHOULD USE OR
SERVICE THIS HEATER
IF YOU NEED ASSISTANCE OR HEATER
INFORMATION SUCH AS AN INSTRUCTIONS
MANUAL, LABEL, ETC. CONTACT THE
MANUFACTURER
WARNING: FIRE, BURN, INHALATION
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
2

WARNING
This heater is designed and approved for use in accordance with Code, CSA 2.14 or
ANSI std Z83.7 2000. CHECK WITH YOUR LOCAL FIRE SAFETY AUTHORITY IF YOU
HAVE QUESTIONS ABOUT APPLICATIONS
Other standards govern the use of fuel gases and heat producing products in specific
applications. Your local authority can advise you about these.
FOR TEMPORARY HEAT ONLY
FOR USE WITH VAPOUR PROPANE & NATURAL GAS ONLY
DO NOT OPERATE IN A CLOSED OR CONFINED SPACE
ALWAYS PROVIDE ADEQUATE VENTILATION. AIR SUPPLY – MUST BE FRESH
AIR FROM OUTDOORS OR ADEQUATE INDOOR SUPPLY
DO NOT USE OR STORE GASOLINE OR FLAMMABLE VAPOURS OR LIQUIDS IN
THE VICINITY OF THE HEATER
HEATER MUST BE INSTALLED ON A LEVEL SURFACE
INSTALLATION:
The installation of this heater shall conform with local codes or, in the absence of codes
with National Fuel Gas Code ANSI Z223.1/NFPA 54 and the Natural Gas and Propane
Installation Code, CSA B149.5. This heater must be installed by a qualified gas technician,
following local codes published by the authority having jurisdiction
The installation of this heater for use with propane tank or cylinder shall conform with
local codes or, in the absence of local codes, with the Standard for the Storage
and Handling of Liquefied Petroleum Gases, ANSI/NFPA 58 and the Natural Gas
and Propane Installation Code, CSA B149.5.
This heater must be located at least 10ft (3m) from any propane gas cylinder
This heater shall not be directed toward any propane gas container within 20ft (6m).
CONNECTING TO YOUR FUEL SUPPLY
PROPANE
If cylinders are used to supply the heater, no cylinders smaller than 100lb capacity shall
be used.
These cylinders must supply a vapor withdrawal only.
1. All cylinder connections must be made using a wrench to tighten the POL fitting
2. Be sure the cylinder valve is in the closed position when connecting
or disconnecting the cylinder.
3. A soap and water solution must be applied to all connections in order to leak
check the system
3

4. The gas must be turned off at the propane supply cylinder(s) when the heater is not in
use. When the heater is to be stored indoors, the connection between the propane
supply cylinder(s) and the heater must be disconnected and the cylinders removed from
the heater and stored in accordance with CSA B149.5, Natural Gas and Propane
ANSI Z223.1/NFPA 54
NATURAL GAS
The regulator should only be used if the supply pressure to the heater is above 14" WC
Connect the regulator to the natural gas supply line.
Gas supply pressure to the heater must be a minimum of 9.0" WC
PIPING:
This heater must be installed by a qualified gas technician following
local codes published by the authority having jurisdiction. Sizing of
supply piping must be determined using the length of pipe run, as
well as total btuh rating of the appliance(s). Appropriate piping
tables must be used to determine size of supply piping, dependant
on the length of run from source.
PRESSURES:
MIN. MAX.
LP INLET PRESSURE: 11 IN. WC 14 IN. WC
NG INLET PRESSURE: 9.0 IN. WC 14 IN. WC
This heater must be supplied by pressures indicated on the
approval label. Over pressure may cause controls to fail
FUEL:
This heater will operate on Propane & Natural Gas only.
The manifold pressure is listed on the approval label.
Any replacement parts must be purchased from the manufacturer
or authorized distributor.
HOSES:
All hoses used to connect this heater of fuel supply must be Type 1
approved propane / natural gas hose assemblies
4

ELECTRICAL:
WARNING
Electrical Grounding Instructions
This appliance is equipped with a Power Supply Indicator &
three-prong (grounding) plug for your protection against shock hazard,
and should be plugged directly into a properly grounded three-prong
receptacle 120v supply must be available. Please note that the motor
on this unit requires 15 amps. Ensure appropriate gauge extension
cord is used.
CLEARANCE TO COMBUSTIBLES:
TOP: 5 ft
FRONT: 2 ft
SIDES: 1 ft
REAR: 2 ft
MAINTENANCE
1Every heater should be inspected before each use, and at least annually, by a
qualified service person
2The hose assembly shall be visually inspected prior to each use, of the
heater. If it is evident there is excessive abrasion or wear, or the hose is cut,
it must be replaced prior to the heater being put into operation.
The replacement hose assembly shall be that specified by the manufacturer.
3The appliance must be kept clear and free from combustible materials,
gasoline and other flammable vapors and liquids.
4The flow of combustion and ventilation air must not be obstructed.
Be sure to check the fan assembly and ensure the motor and blade
are operating properly.
5Compressed air may be used to keep components free of dust and dirt
build up.
Note:
Do not
use the compressed air inside any piping or regulator components
5

START UP INSTRUCTIONS
1For LP - Connect the POL inlet on the regulator of the heater to the propane
cylinder.
For NG - Ensure the Heater is provided with a gas supply of 9.0" WC
2Ensure fuel selector valve on heater is in the proper position
(Propane or Natural Gas).
3Turn on fuel supply.
4Depress the fan switch to the “ON” position. The fan motor will start and air
will be pushed through the outlet of the heater.
5Depress the heat switch to the “ON” position. The burner should ignite
and hot air will be pushed through the outlet of the heater.
6Confirm & Set proper manifold pressure (see page 7)
7Set the thermostat (if provided) to desired temperature.
8
Visually watch the Power Supply Indicator light.
(see heater label if power
is acceptable)
9If heater fails to ignite after 3 attempts, call your supplier for service.
TO SHUT DOWN
1Close fuel supply.
2 Move "Burner" switch to "OFF" position.
3Wait 2-3 minutes and move “FAN” switches to the “OFF” position.
4Disconnect heater from fuel supply.
Important Note
When heater is to be stored indoors, the connection between the propane supply cylinder(s) and the
heater must be disconnected and the cylinder(s) removed from the heater and stored in accordance
with CSA B149.5, Natural Gas and Propane Installation Code & ANSI Z223.1/NFPA 54
6

THC-355CDF - HEATER SPECIFICATIONS
MODEL THC-355CDF
FUEL TYPE (dual fuel) PROPANE NATURAL GAS
MAXIMUM INPUT (btu/hr) 330,000 btuh 330,000 btuh
INLET PRESSURE Min. 11"WC/Max. 14"WC Min. 9.0" WC/Max. 14"WC
BURNER MANIFOLD PRESSURE 7.75" WC 5.5" WC
FUEL CONSUMPTION PER HR. 16.0 LBS. 307 CFH
TEMPERATURE RISE (above ambient)
160 (F) 150 (F)
AMP DRAW STARTING 21 AMPS
CONTINUOUS 7 AMPS
OUTLET SIZE 12.5" X 10.75"
(Designed for 18" Dia. Ducting)
DIMENSIONS 42" X 46" X 32.5"
H X L X W (IN.)
SHIPPING WEIGHT 390 LBS.
IGNITION Direct Spark Ignition
Thermostat Control
AIR CIRCULATION 2400 CFM
APPROVED cETLus listed
7

THC SERIES TROUBLESHOOTING ANALYSIS
PLEASE NOTE: In order to facilitate trouble shooting, unit panels have been removed in some of these pictures
for ease of identification only.
All panels and fasteners must be in place as provided by the manufacturer to ensure the safe and efficient operation of
this gas fuelled appliance.
PROBLEM POSSIBLE REMEDY COMPONENT
CAUSES
No heat, fan
Rear of heater blocked Ensure rear of heater is
running
unobstructed and proper rear
clearances are maintained (see
for specifications).
rear of appliance Carefully open the panel
If the rear of the heater is The high temperature switch reset
obstructed, the ¾” snap disc button is found behind the louvers
manual reset limit may trip on the rear of the heater
and must be reset manually DISCONNECT THE POWER TO
before the burner can operate. THE HEATER. Reach around the
protective screen; and push the
“red” button to reset on the switch
make certain to close the panel
before operating the appliance
Rear of appliance (¾” snap disc manual reset limit
exposing ¾” snap disc switch shown for clarity.)
manual reset limit
switch.
8
Red button

PROBLEM POSSIBLE REMEDY COMPONENT
CAUSES
Faulty On-Off Burner Switch Replace the switch
Heater will not
Gas Supply Ensure required gas supply
Light
pressures are available to the heater
(see approval label for specs).
Gas Valve/Solenoid Ensure solenoid is energized
(use volt meter to measure).
Ensure plunger in solenoid is being
activated (use manometer at the
test point after solenoid).
Igniter/Flame sensor Ensure the gap between the igniter Adjust this side only
and sensor is approx. 1/8" - 3/16".
DO NOT adjust the porcelain side
of the igniter or permanent damage
may result.
Check igniter wire connections.
Ensure igniter spark is strong.
Replace igniter if necessary.
Note location of igniter sensor
9

PROBLEM POSSIBLE REMEDY COMPONENTS
CAUSES
Igniton Board Ensure electrical signals for igniter
and gas valve/solenoid are present.
Typical igniton board.
Ensure ignition board is properly
grounded.
Thermostat Ensure that the thermostat is calling
for heat (if it is, the fan will start).
Please note that as a safety
measure, the thermostat is equipped
with a 10 - second delay.
Optional Thermostat If your appliance is equipped with
an optional external thermostat,
check that connections are secure
and restart the appliance. If the
appliance fails to restart, remove the
optional line thermostat and restart
the appliance to confirm its
operational status. If the unit starts,
then replace the thermostat.
10

PROBLEM POSSIBLE REMEDY COMPONENTS
CAUSES
Heater will not
Faulty igniter wire Check igniter wire for any damage
remain lit after
replace if necessary.
start up
Faulty igniter/flame sensor Ensure connections are secure
Replace igniter/flame sensor if
necessary.
Ignition board Check ground wire for proper
connection.
Visually check the Power Supply
Indicator
(see sticker on heater)
Green light - Meets Power Req.
Solid Red Light - Reverse Polarity
Flashing Red Light- Ground or Neutral
Missing
Thermostat Ensure thermostat is calling for heat
NOTE: if the thermostat is not
calling for heat, the appliance will not
operate.
Electrical
All Components Before replacing any components, all
connections must be checked to
ensure electrical circuit is complete
(Use volt meter and enclosed wiring
diagram)
Piping
All pipe fittings When loosenEd, tightened or
replaced, the complete fitting
should be removed and approved
pipe dope applied all male threads
before reconnection.
After a heater is serviced, the valve
train should be checked for leaks
with a soap and water solution or
approved leak detector solution.
11

PARTS LIST FOR THC-355CDF
Part Number Part Description
THCP-101 CAST IRON BURNER
THCP-102 IGNITER/ FLAME SENSOR ASSEMBLY
THCP-103 IGNITER WIRE
THCP-104 120/24 VOLT TRANSFORMER
THCP-105A GAS VALVE / SOLENOID - 24V (THC-355DF ONLY)
THCP-106A IGNITION CONTROL - 120V
THCP-107A WIRING HARNESS FOR THCP-106A
THCP-108B HIGH TEMPERATURE LIMIT (OUTLET) 250F - (THC-355DF ONLY)
THCP-109 HIGH TEMPERATURE LIMIT (BURNER)
THCP-110 AIR PROVING SAIL SWITCH
THCP-111 MAIN BURNER OR FAN SWITCH
THCP-113A 3/4 HP MOTOR - THC-355DF
THCP-114B FAN BLADE - THC-355DF
THCP-115A ORIFICE FOR THC-355DF
THCP-119A ORIFICE HOLDER FOR THC-355DF
THCP-121A POWER CORD FOR THC-355DF
THCP-122 SIDE HANDLES (EACH) TWO REQUIRED
THCP-124A WHEELS - 12" (EACH) TWO REQUIRED
THCP-124B 6" LOCKABLE CASTERS (EACH) TWO REQUIRED
THCP-125LB WHEEL SHAFT - THC-355DF
THCP-131 TENT HEATER DOOR LATCH (EACH) TWO REQUIRED
THCP-132 DOOR HINGE (EACH) FOUR REQUIRED
THCP-146 BELT TENSIOR
THCP-147 BELT TENSIOR PULLEY
THCP-148 BELT TENSIOR PULLEY BUSHING
THCP-149 MOTOR PULLEY
THCP-150 SHAFT PULLEY
THCP-151 PILLOW BLOCK (TWO REQUIRED)
THCP-152 3/4" X 16" PULLEY SHAFT
THCP-153 DRIVE BELT
THCP-154 POWER SUPPLY INDICATOR

THCP-155 LOCKABLE FUEL SELECTOR VALVE
THCP-156 INLET RING - THC-355DF
THCP-157 FRONT DOOR - THC-355DF
THCP-158 REAR DOOR - THC-355DF
THCP-159 TOP PANEL - THC-355DF
THCP-160 SIDE BODY PANEL (OULET) - THC-355DF
THCP-161 SIDE BODY PANEL (FUEL SUPPLY) - THC-355DF
40-100-12 3/4" 90 DEGREE ELBOW
40-113E5 3/4" X 5" NIPPLE
40-113D1.5 1/2" X 1 1/2" NIPPLE
40-116-8 1/2" 90 DEGREE STREET ELBOW (EACH) TWO REQUIRED
40-120-12-8 3/4" X 1/2" REDUCING BUSHING
S60180-12 3/4 ID MP X JICFFL 15-FT HOSE ASS'Y
348-12E 3/4 MP X 3/4 M.JIC STEEL ADAPTER
THCP-162 3/4" LARGE TWIN STAGE REGULATOR inc. POL
2003-T POL FITTING
ACCESSORIES
Part Number Part Description
THCP-WD18 18" X 12FT DUCTING
THCP-DA18 DUCT ADAPTER FOR 18" DUCTING
THCP-DD18 DUCT DIFFUSER FOR 18" DUCTING
13