Flagro FVO-400RC Instruction Manual

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OPERATING INSTRUCTIONS MANUAL
(Please retain for future reference)
For
FVO-400RC INDIRECT FIRED SPACE HEATERS
CERTIFIED FOR USE IN CANADA AND U.S.A.
As per CSA B140.8 Portable Oil Fired Heaters / CSA B140.02003 Oil Burning Equipment
Construction Heaters Unattended Type/ UL 733 Oil-fired Air Heaters
Issue date: September 9, 2016
2003325
FLAGRO INDUSTRIES LIMITED
ST. CATHARINES, ONTARIO
CANADA

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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, LABELS, 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.
WARNING:
INTENDED USE IS PRIMARILY THE TEMPORARY HEATING OF BUILDINGS
UNDER CONSTRUCTION, ALTERATION, REPAIR OR EMERGENCIES ONLY.

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This heater is designed and approved for use as a
construction heater under CSA B140.8 Portable Oil
Fired Heaters / CSA B140.02003 Oil Burning Equipment. UL 733
Oil-fired Air Heaters
We cannot anticipate every use which may be made
of our heaters. CHECK WITH YOU 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.
SPECIFICATIONS
Model …………………………………………………….…. FVO-400RC
Input …………………………………………………….…... Range
325,000 – 390,000
Fuel …………………………………………………………. No.1, No. 2,
diesel or
kerosene
Fuel Pressure …………………………………………….... 170 psi
Nozzle ………………………………………………………. 2.25 x 45B
390,000 Btu
2.00 x 60B/W
353,000 BTU
1.75 x 60B/W
325,000 BTU
Electrical……………………………………………………. 120V 15AMP
Ignition ………………………………………………………. Direct Spark
…….……………………………………………...…. Thermostat
Control
Air Circulation ………………………………………………. 4000 cfm
Fuel Consumption ………………………………………...... 2.75 Gal/hr
Approved …………………………………………………...... cETLus listed

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INSTALLATION:
The installation of this heater for use with No.1, No.2, Diesel or Kerosene and
shall conform with local codes or, in the absence of codes, with the National Fuel
Gas Code ANSI Z223.1/NFPA 54. Installation of the unit shall be in accordance
with the regulations of the authorities having jurisdiction or the CSA Standard
B139.
CLEARANCE TO COMBUSTIBLES:
TOP FRONT SIDES REAR FLUE PIPE
3 ft 10 ft 3 ft 3 ft 3 ft
FUEL: This heater will operate with No.1, No.2, Diesel or Kerosene.
Note: No.1 Fuel Oil or Kerosene must be used for
temperatures less than –10º C (8º F).
REMOTE TANK OPTION:
The FVO-400RC may be installed with a remote fuel tank providing the
manufacturer approved FVO-TLS remote fuel kit is used. This kit includes the tiger
loop system using a single line supply and pressure relief valve. This system
prevents overpressure fuel supply and stops the fuel flow in the case of a leak in
the fuel line where pump vacuum pressure is lost. A maximum of 50 ft supply
hose must be used with this installation.
All installations must conform to local installation codes and authorities having
Jurisdiction.
ELECTRICAL: WARNING
Electrical Grounding Instructions
This appliance is equipped with a three-prong (grounding)
plug for your protection against shock hazard and should be
plugged directly into a properly grounded three-prong
receptacle.
115v supply must be available. Please note that the heater
requires 15 amps for proper operation. Ensure appropriate
gauge extension cord is used.
• 12/3 AWG at 50 Feet
• 10/3 AWG at 100 Feet

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FLUE PIPE: Flue pipe connection must terminate with a vertical run at
least 2ft long.
The vent outlet on the heater is 6” diameter. Certified venting
must be used at all times. Vent cap should be installed in
situations where downdrafts occur. All venting must
correspond with the CSA B149 standard or in its absence,
local codes.
FV SERIES CONSTRUCTION HEATER – VENTING REQUIREMENTS
HORIZONTAL FLUE RUN - RISE RATIO 1:10
VERTICAL FLUE RUN
D
A
FLUE OUTLET OF HEATER
FLUE OUTLET OF HEATER
C
B
B
EXTERIOR WALL
1. VERTICAL FLUE TERMINATIONS
2. HORIZONTAL FLUE TERMINATIONS
A - VENT TERMINATION MUST BE A MINIMUM OF 2FT HIGHER THAN ANY POINT
WITHIN 10FT.
B - MAXIMUM HORIZONTAL RUN IS 30FT.
NOTE: 90deg ELBOW = 10ft HORIZONTAL VENT ALLOWANCE
45deg ELBOW = 5ft HORIZONTAL VENT ALLOWANCE

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C - VENT TERMINATION IN HORIZONTAL POSITION MUST BE MINIMUM 4ft FROM ANY
COMBUSTABLE SURFACE
D - EXTERIOR VERTICAL VENT TERMINATION MUST BE A MINIMUM OF 2ft.
NOTE: ALL VENT TERMINATIONS MUST HAVE A RAIN CAP INSTALLED AS PER
LOCAL CODE REQUIREMENTS.
OUTLET DUCTING:
Hitex heater duct with a minimum temperature handling of
300 deg F. including wire reinforcement to prevent collapsing.
Heater is designed for use with 2 x 12” (FV-HD12) diameter
or 1 x 16” (FV-HDG16) ducts equipped with pin lock couplings
or cuff & buckle.
Install ducting to outlet on the heater using pin-locks or cuff &
buckle provided on collar of ducting. Ducting should be
inspected periodically for tearing and/or wear marks. Ducting
should be stored in a dry area when not in use.
INLET DUCTING:
Ventflex duct must be used on the return air. The heater is
designed for 16” inlet diameter ducting. P/N FV-HDV16
MAINTENANCE:
1. Every construction heater should be inspected before each use, and at
least annually by a qualified service technician. Incorrect maintenance
my result in improper operation of the heater and serious injury could
occur.
2. Service and Maintenance only to be performed by a qualified service
technician.
3. The hose assemblies 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.
4. The flow of combustion and ventilation air must not be obstructed. Be sure to
check the fan assembly and ensure that the motor and blade are operating
properly.
5. Compressed air should 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.

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6. Change fuel filter insert (Part# FVO-419) once per month. Change fuel filter
cartridge (Part# FVO-418) once every 6 months.
7. Change oil nozzle once per year. FV-435B (2.00 X 60B/W), FV-435WC (1.75
X 60B/W)
8. Fan Limit Switch (Part# FV-407A) should be replaced if the fan motor does not
shut off after the heat exchanger has cooled down.
9. The High Limit Switches (Part# FV-406 & FV-437) should be checked each
season. These limit switches will ensure the burner shuts down if the
temperature exceeds 150º F at rear of unit and 250º F at the outlet.
10.Fuel tank should be drained on a regular basis by removing drain plug.
CAUTION: Do not have any source of ignition near the heater when draining tank.
NOTE: No.1 fuel oil or kerosene is recommended for temperatures below
-10º C / 8º F
11. Heat Exchanger should be cleaned if smokey conditions continue even after
the air adjustments on the burner are made.
START UP INSTRUCTIONS:
1. Position heater properly on a level surface.
2. Ensure the toggle switch is in the “OFF” position
3. Ensure Burner “air gate” is properly set at 4.5
4. Ensure electrical cord is grounded and plugged into a 115V 15amp
outlet. Verify cord size – 12/3 AWG at 50ft & 10/3 AWG at 100ft
5. The power indicator light on the control box will engage. If the green
light illuminates, you have proper power supply. If not, refer to the
sticker on the heater to verify power supply issue(s). Correct the power
supply issue(s) before operating the heater.
6. Move toggle switch to “MANUAL” position for manual control.
7. Move toggle switch to “THERMOSTAT” position for thermostatic control.
Thermostat must be plugged into heater first.

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Please Note:
1. If using Thermostat on unit, unit must be started in Thermostat position.
2 When changing between manual and thermostat operation, the heater
must be left in the “OFF” position for 30 seconds to prevent the burner from
locking out.
3. When using a generator for electrical supply, make sure the generator
is properly grounded and generator is at a 60Hz frequency.
4. In the event that a Generator is being used and the generator runs out of
fuel, make sure the heater switch is in the “OFF” position before restarting
generator, failure to do so may damage heater.
TO SHUT DOWN:
1. Move Burner switch to “OFF” position
NOTE: The main fan will continue to operate after the burner shuts down.
Once the unit has cooled down, the fan will stop.
IF HEATER FAILS TO START:
1. Press manual reset button at rear of burner. (Red button).
2. Check fuel level. There must be 2-4 gallons of fuel in the tank for the
heater to start properly.
3. Make sure there are no air locks in fuel lines or filter.
4. Ensure proper power supply and extension cord is being used.
5. Check for dirty fuel filter or blocked fuel supply line.
6. Check burner nozzle assembly.
NOTE: IF THE BURNER HAS BEEN RESET SEVERAL TIMES THERE
MAY BE AN ACCUMULATION OF OIL IN THE CHAMBER! DO NOT
CONTINUE TO TRY AND START THE HEATER!
DRAIN OIL FROM HEAT EXCHANGER USING DRAIN HOLE AT FRONT OF
HEAT EXCHANGER FOR 15-20 MINUTES BEFORE ATTEMPTING TO
RELIGHT. LET REMAINING EXCESS OIL BURN OFF BEFORE CHECKING
COMBUSTION OF UNIT.

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SAFE OPERATION PRECAUTIONS:
1. Do not fill fuel tank while heater is operation.
2. Do not attempt to start heater if excess oil remains in the heat
exchanger.
3. Use switch to shut down the heater. Do not try to shut down the heater
by unplugging the electrical cord.
4. Do not plug anything other that the thermostat into the “Thermostat”
plug.
5. Do not use any fuel other that those listed on rating plate.
6. Follow electrical requirements shown on rating plate and/or Electrical
requirements section of this manual.
7. Before removing any guards or performing any maintenance, be sure
that the main power supply is disconnected.
COMBUSTION AIR ADJUSTMENTS:
NOTE: Proper combustion air adjustment must be achieved using a certified
combustion analyzer and smoke tester to ensure complete
combustion.
The air adjustment should be
made to achieve 10% CO
2
and
No. 1 or “trace” smoke.
(Bacharach Scale)
SETTING THE AIR
ADJUSTMENT PLATE
A) Regulation of the
combustion air flow is made
by adjustment of the manual
AIR ADJUSTMENT PLATE
(1) after loosening the FIXING
SCREWS (2 & 3). The initial
setting of the air adjustment
plate should be made

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according to Column 5 in the Burner Set-up Chart.
B) The proper number on the manual AIR ADJUSTMENT PLATE (1) should
line up with the SETTING INDICATOR (4) on the fan housing cover. Once set,
the air adjustment plate should be secured in place by tightening SCREWS 2
and 3.
C) The final position of the air adjustment plate will vary on each installation.
Use instruments to establish the proper settings for maximum CO
2
and a smoke
reading of zero.
NOTE: Variations in flue gas, smoke, CO
2
and temperature readings may be
experienced when the burner cover is put in place. Therefore, the burner cover
must be in place when making the final combustion instrument readings, to
ensure proper test results.
BURNER SET-UP CHART
1 2 3 4 5
ACTUAL
FIRING RATE
± 5%
NOZZLE
SIZE PUMP PRESSURE TURBULATOR
SETTING
AIR
DAMPER
SETTING
GPH GPH PSI BAR
2.75
2.25 x 45°
2.00 x 60°
1.75 x 60°
170
170
170
10
10
10
5
5
5
4 - 6
4.5
4.5
* Note – Air damper setting is typically set at 4 for operation in colder
temperatures. A combustion analyzer should always be used when setting the
burner.
TEMPERATURE FEELER GAUGE ADJUSTMENT
(ATTACHED TO FAN SWITCH)
The temperature feeler gauge is required to be always touching the heater
exchanger.
The temperature feeler gauge controls the air flow over the fan switch, which
eliminates any unnecessary fan cycling. The temperature feeler gauge can be
adjusted for different outside temperatures, by rotating the location of the
temperature feeler gauge holes. This will provide maximum performance of the
unit in different applications.
If supply air is warm (-5º C, indoor application):

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Turn the temperature feeler gauge so that the holes are parallel with the heat
exchanger. This will help the fan switch to remain cool and not overheat. See
following:
If supply air is cold (under -5ºC):
Turn the temperature feeler gauge so that the holes are closed off as the air goes
over the heat exchanger. This will reduce fan cycling and the unit from shutting
down. See following:
In extreme cold conditions, cover the holes on the temperature feeler gauge using
foil tape. Ensure that the temperature feeler gauge is readjusted for warmer
weather conditions. Failure to do so may result in burning out fan switches- not
covered under warranty.

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POWER SUPPLY INDICATOR LIGHT/VOLT METER/PRE-HEATER:
The power supply indicator light will help detect any faulty power supplied to the
heater such as; grounding issues, reverse polarity or missing/poor connections.
Warning Light Indications
Green Light ……………… Meets Power Requirements
Solid Red Light………….. Reverse Polarity
Solid Red & Green Light… Ground Issue
Volt Meter – Measure Volts supplied to Heater
ATTENTION: IF SOLID RED & GREEN IS INDICATED, MAKE CORRECTIONS
TO POWER SUPPLY BEFORE TURNING HEATER ON. FAILURE TO DO SO
WILL VOID ANY WARRANTY.

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ELECTRICAL CONNECTIONS
It is advisable to leave the control box off the sub-base while completing the
electrical connections to the burner.
The burner may be controlled using either a DIRECT LINE VOLTAGE control
circuit (120V AC 60 cycle) OR a LOW VOLTAGE control (24V AC 60 cycle)
using a R8038A Honeywell switching relay or equivalent.
Using the appropriate diagram below, make electrical connections to the
burner. All wiring must be done in accordance with existing electrical codes,
both national and local.
When all electrical connections have been made, the control box may be put
back in place on the sub-base.
WARNING: DO NOT activate burner until proper oil line connections have
been made, or failure of the pump shaft seal may occur.

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APPLICATION FIELD WIRING
REMOTE SENSING OF SAFETY LOCKOUT: The SAFETY SWITCH in the
530SE CONTROL BOX is equipped with a contact allowing remote sensing of
burner lockout. The electrical connection is made at terminal 4 (●) on the SUB-
BASE. Should lockout occur the 530SE CONTROL BOX will supply a power
source of 120Vac to the connection terminal. The maximum allowable current
draw on this terminal (4) is 1 Amp.
WARNING: If a neutral or ground lead is attached to this terminal, the
CONTROL BOX on the burner will be damaged should lockout
occur.

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INSERTION / REMOVAL OF DRAWER ASSEMBLY
A) To remove drawer assembly, loosen SCREW (3), then unplug CONTROL
BOX (1) by carefully pulling it back and then up.
B) Remove the AIR TUBE COVER PLATE (5) by loosening the two retaining
SCREWS (4).
C) Loosen SCREW (2), and then slide the complete drawer assembly out of the
combustion head as shown.
D) To insert drawer assembly, reverse the procedure in items A to C above, and
then attach fuel line to the pump.

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NOZZLE PLACEMENT
A) Remove the NOZZLE ADAPTER (2) from the DRAWER ASSEMBLY by
loosening the SCREW (1).
B) Insert the proper NOZZLE into the NOZZLE ADAPTER and tighten securely
(Do not over tighten).
C) Replace adapter, with nozzle installed, into drawer assembly and secure with
screw (1).
ELECTRODE SETTING

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TURBULATOR SETTING
A) Loosen NUT (1), then turn SCREW (2) until the INDEX MARKER (3) is aligned
with the correct index number as per the Burner Set-up chart, on page 12.
B) Retighten the RETAINING NUT (1)
NOTE: Zero and five are scale indicators only. From left to right, the first line is
5 and the last line 0.
OIL LINE CONNECTIONS
Note: Pump pressure must be set at time of burner start-up. A pressure gauge is
attached to the PRESSURE PORT (8) for pressure readings. Two PIPE
CONNECTORS (5) are supplied with the burner for connection to either a single or a
two-pipe system. Also supplied are two ADAPTORS (3), two female 1/4” NPT, to adapt
oil lines to burner pipe connectors. All pump port threads are British Parallel Thread
design. Direct connection of NPT threads to the pump will damage the pump body.
Riello manometers and vacuum gauges do not require any adaptors, and can be safely
connected to the pump ports. An NPT (metric) adapter must be used when connecting
other gauge models.

PARTS LIST FOR FVO-400RC
Part Number Part Description
FV-401A 1 HP FAN MOTOR FOR FVO/FVN/FVP (RC UNIT)
FV-402RC 16" BC IMPELLER FOR FV-400RC
FV-402RCA VENTURI FOR 16" BC IMPELLER
FV-403A 16" WHEEL - FLAT FREE
FV-404 18" POWER CORD C/W PLUG END
FV-405 SS HEAT EXCHANGER
40-113-D7GALV 1/2" X 7" GALVANIZED NIPPLE
40-108-8GALV 1/2" GALVANIZED CAP
FV-406 HIGH LIMIT SWITCH (OUTLET)
FV-407A FAN LIMIT SWITCH (ADJUSTABLE)
FV-407G FAN LIMIT SILICONE GASKET
FV-P01RC TOP BODY PANEL
FV-P02 BOTTOM BODY PANEL
FV-P04RC REAR BURNER MOUNT PANEL
FV-P05RC MOTOR MOUNT BRACKET
FV-P08RC CONTROL BOX
FV-P09RC CONTROL BOX LID
FV-P10 LIMIT BOX (DOUBLE HOLE)
FV-P11 LIMIT BOX (SINGLE HOLE)
FV-P12 LIMIT BOX LID
FV-408RC RECIRCULATING FAN MOTOR CANOPY
FV-408IFP CANOPY INNER FACEPLATE
FV-408IR CANOPY INLET RING
FV-411 RED LIGHT (ON CONTROL BOX)
FV-414B THERMOSTAT PLUG (ON CONTROL BOX)
FV-415A MALE CONNECTOR FOR FV-THB
FVO-415 RIELLO BURNER (F10)
FVO-416A 42 US GALLON OIL TANK (POLY TANK)
FVO-416H TANK HARNESS
FVO-416G FUEL GAUGE
FVO-417B OIL TANK CAP (POLY TANK)
40-121-6GALV OIL TANK DRAIN PLUG (FOR POLY TANK)

FVO-418 FUEL FILTER (COMPLETE)
FVO-419 FUEL FILTER (INSERT ONLY)
FVO-420A CLEAR FUEL LINE 14" (TANK TO FILTER)
FVO-421A CLEAR FUEL LINE 6.5" (FILTER TO BURNER)
FVO-422A CLEAR FUEL LINE 14" (BURNER TO TANK)
48-6C BRASS FITTING (POLY TANK TO FILTER)
2103-C-CGA 3/8" SHUT OFF VALVE
122-C 3/8" BRASS HEX NIPPLE
49-6C 3/8" MP X 3/8" M.FL BRASS ELBOW
49-6B 1/4" MP X 3/8" M.FL BRASS ELBOW
FV-431 BURNER GASKET
FV-433 FEELER GAUGE
FV-433B FEELER GAUGE - SOLID
FV-434CB12 FRONT FACE PLATE (2 X 12")
FV-434CB16 FRONT FACE PLATE (1 X 16")
FV-435H OIL BURNER NOZZLE (1.75 X 60W)
FV-435B OIL BURNER NOZZLE (2.00 X 60W)
FV-436A SUPPORT LEG (POLY TANK)
FV-437 HIGH LIMIT (REAR)
FV-438RC LIFTING HARNESS
FVO-440A WHEEL AXLE - (POLY TANK)
FV-446 SIGHT GLASS C/W FIBER GASKET
FV-447 SIGHT GLASS WASHER
FV-448 MAIN RELAY
FV-450SI POWER SUPPLY INDICATOR FOR FV-SERIES 2014>
FV-461 PUMP INLET/OUTLET ADAPTER
FV-469 120V LED VOLT METER
FVO-3000443 PUMP DRIVE KEY
FVO-3002278 SUB-BASE FOR BURNER
FVO-3002279 COIL
FVO-3002280 PHOTO CELL
FVO-3005844 CAPACITOR
FVO-3005854 SEMI FLANGE FOR F10 BURNER (FVO-400)
FVO-3005855 MOUNTING FLANGE
FVO-3005869 ELECTRODE PORCELAIN
FVO-3005891 ELECTRODE ASSEMBLY

FVO-3006553 COIL U-BRACKET C/W KNURLED NUT
FVO-20136491 CONNECTION FOR THE NOZZLE HOLDER
FVO-20136639 NOZZLE HOLDER
FVO-3006966 ELECTRODE SUPPORT
FVO-3006978 TURBULATOR DISC.
FVO-3006983 END CONE ADAPTER (F10 BURNER)
FVO-3006992 PIPE CONNECTOR - SUPPLY
FVO-3006993 PIPE CONNECTOR - RETURN
FVO-3007077 CRUSHABLE METAL WASHER
FVO-3007087 NOZZLE OUTLET WASHER FOR F10 BURNER
FVO-3007203 VALVE PLATE FOR OIL BURNER
FVO-20136636 BURNER BACK COVER
FVO-3007268 NOZZLE OUTLET FITTING FOR F10 BURNER
FVO-3007317 AIR TUBE COVER PLATE FOR F10 BURNER
FVO-3007568 BLEEDER SCREW
FVO-3949072 LONG COMBUSTION HEAD FOR F10 BURNER
FVO-20136488 FUEL PUMP
FVO-C700-1029 IGNITION MODULE
FVO-C7001034 BURNER MOTOR
FVO-C7001034 MOTOR
ACCESSORIES
FV-HD12 12" X 12-FT HITEX VINYL DUCTING PIN LOCK
FV-HD12X25 12" X 25-FT HITEX VINYL DUCTING PIN LOCK
FV-HDG16 16" X 25-FT HITEX VINYL DUCTING CUFF & BUCKLE
FV-HDV16 16" X 25-FT VENTFLEX DUCTING CUFF & BUCKLE
FV-VK 6" X 3 FT C-VENT C/W RAIN CAP
FVO-C7050010 VACUUM & PRESSURE TESTER MANIFOLD
FVO-C7001001 EMERGENCY SERVICE KIT