Econo Heat OMNI OWH-350 Manual

Waste Oil Fired Heater
Installation, operation and service instructions
OWH-350 120v Manual
EconoHeat • 5714 E. First Avenue • Spokane Valley, WA 99212 • 800.255.1363 • www.econoheat.com • Rev 01/2017
240 V
Omni Heat NZ * P.O Box 112 Cromwell 9342 * 32 Ree Crescent Cromwell 9310 * 027 203 2121 * www.omniheat.co.nz

Page 2OMNI by EconoHeat
Table of Contents
Precautions ................................................................................... Page 3
Important Notice ......................................................................... Page 4
Specifications ............................................................................... Page 5
Installation Procedures .............................................................. Page 6
Stack Installation .......................................................................... Page 7
Oil Supply Tubing ......................................................................... Page 7
Wiring .............................................................................................. Page 8
Ducting ........................................................................................... Page 8
Oil Burner ....................................................................................... Page 9
Oil Burner Technology .............................................................. Page 11
Initial Start Procedure ............................................................... Page 13
Maintenance Schedule .......................................................... Page 14
Figures 9 – 14 .............................................................................. Page 15
Troubleshooting ......................................................................... Page 18
OWH-350 Fifteen Year Limited Warranty ............................. Page 19
Warranty Card ........................................................................... Page 20

Page 3OMNI by EconoHeat
PRECAUTIONS
Waste oil may contain many foreign materials. Waste oil may also contain
gasoline. Therefore, specific precautions on the handling and storage of waste
oils are to be observed when using, cleaning, and maintaining this heater. Use a
screen in a funnel when pouring oil into storage tank to catch foreign material,
i.e., gasket material and sealant fibers, etc. WARNING: This appliance is not
designated for use in hazardous atmospheres containing flammable vapors
or combustible dust, or atmospheres containing chlorinated or halogenated
hydrocarbons. Do not expose this unit to rain or moisture. If installed in high
moisture atmosphere, a special cover for the integrated air compressor
must be obtained from factory to avoid rusting of internal raw metals. If this
occurs, see trouble-shooting guide for remedy. OMNI burns the widest range of
used and new oils including, but not limited to: used motor oils up to 90 weight,
transmission and hydraulic fluid, used synthetic oils, crude oil, vegetable, fish, and
mineral oil,all diesel fuel and many more. Do not use old, contaminated oils that
have been stored in underground tanks or outside barrels for long periods of time.
Excessive water and sludge may be present, causing quick filter plugging.
NOTES: The instructions contained in this manual apply to the installation,
operation, and service of OMNI Waste oil fired heaters. The following instructions
should be carefully followed for obtaining the best possible installation, operation,
and service conditions. Specifications are subject to change without notice. This
heater was designed to be a primary or auxiliary heat source, but not the only
source of heat. And provide economical disposal of waste oil. Proper operation
depends on the consistency of the oil. Any water or foreign material in the oil may
cause the unit to shut down. If a continuous stream of oil cannot be guaranteed
at the heater, the main heating system should be set above freezing which will
prevent any building damage if the waste oil heater were to become inoperative
during subfreezing weather, i.e. supply tank empty, filter plugged, etc.
UNCRATING: Immediately upon uncrating units, check rating plate for certainty
of electrical and mechanical characteristics. Also, check the unit for any damage
that may have been incurred in shipment, if any damage is found, file a claim
with the transporting agency. The unit has been tested and inspected at the
factory prior to crating and was in perfect condition at that time. If anything is
missing, check packing slip for indications of possible backorder of those parts or
components. Otherwise, a claim must be filed for those missing parts.

Page 4OMNI by EconoHeat
IMPORTANT
Notice to the owner and installer
To enjoy the long-term benefits of burning your used oil in an OMNI Waste Oil Burning appliance,
it is necessary to become familiar with the correct installation operation and maintenance
of your new furnace. Before installing or operating this appliance, make sure you read and
understand this manual.
IMPROPER INSTALLATION, ALTERATIONS, OR LACK OF MAINTENANCE WILL VOID THE
WARRANTY.
The most critical sections of this manual are in order of importance as follows:
• Basic Operation Knowledge
• Oil Suction Line Installation
• Correct Draft Over Fire
• General Maintenance Requirements
Identical to any gas or oil furnace, without adequate draft over the fire, the combustion
gases cannot escape the furnaces. The flame will lengthen resulting in an overheated
combustion chamber. Even if the heater is installed correctly and adequate draft achieved,
a flue passage blockage will affect the draft. Burning used oil is similar to burning wood. A
fine gray ash accumulates in the chamber and flue passage. This accumulation of ash will
eventually affect the draft. It is important to remove this ash before the draft is affected.
These topics are discussed in detail on the pages listed above. Please familiarize yourself with
these sections of your manual. Spending a few minutes to review this material will assure that
you receive the return on investment that you expect from your OMNI heater.

Page 5OMNI by EconoHeat
Specifications
BTU INPUT: 350,000
BTU OUTPUT: 300,000
GALLONS PER HOUR: 2.4
REQUIRED VOLTS: 115
AMPs FULL LOAD: 18.7
FAN MOTOR HP: 2 @ 1/4 each
FAN MOTOR RPM: 1075
CFM (FREE AIR): 6275
CFM w/ DUCTWORK @ 100 ft.: 1600
EFFECTIVE AIR FLOW: 80 ft
FLUE SIZE: 8"
WEIGHT: 400 lbs
L x W x H (including burner): 66” x 29.5” x 28.5”
SHIPPING WEIGHT: 575 lbs
SHIPPING DIMENSIONS (L x W x H): 76” x 38” x 49”
Notes:
1. All illustrations and specifications contained herein are based on the latest information
available at the time of publication approval. EconoHeat reserves the right to make
changes at any time without notice, in materials, specifications, and models or to
discontinue models.
2. These appliances are designed for commercial or industrial use only. Installation and
use of this waste-oil burning appliance shall be in accordance with the Standard for
the Installation of Oil Burning Equipment-ANS/NFPA 31-1987, and National Electric Code -
ANSI/NFPA 70-1990 and the requirements of the inspection authorities having jurisdiction.
3. Output depends on BTU content of oil used.
4. Atomizing Air Pressure for all fuels 10 P.S.I.
5. Furnace not to be used with air filters.
6. Intended maximum outlet air temp. 200 degrees F. (93 degrees C) or less.
7. Clearance from combustible materials on all models not to be less than:
TOP- 18” BOTTOM- 18” SIDES- 18”
REAR- 18” FRONT- 48” FLUE PIPE- 18”
Mounting Dimensions:
Heater (top)
35.5”
20”
240

Page 6OMNI by EconoHeat
Installation Procedures
Figure 1 – Installation Diagram

Page 7OMNI by EconoHeat
Stack Installation
1. Install a barometric damper (NOT included) in the stack if the draft up the stack
exceeds -.08. Draft up the stack must be -.04 to -.06 inches of water column. Check with
draft meter between the top of the heater and damper. The over fire draft should be a
minimum of -.02- check through flame inspection port. Closing the damper door can
increase draft.
2. For optional draft inducers or power vent wiring, See Figure 2. One of these devices must
be installed where back draft is present. In building or correct draft cannot be achieved.
Oil Supply Tubing
1. Use ONLY 3/8” nominal ID copper tubing with flare fittings only on the fuel suction from
the tank to the heater. Do NOT use ferrule fittings or Teflon tape on any pipe-fittings.
2. Keep suction line approximately 6” from bottom of oil tank to prevent suction of sludge.
Drain accumulated sludge and water from tank periodically.
3. Use only an inside oil storage tank to supply heater. Do not draw from an outside tank,
especially not an underground tank, directly to heater. A separate transfer pump from an
outside tank with proper filtration to the inside supply tank is acceptable and available
from EconoHeat.
4. The fuel supply pump included with heater is to be mounted at tank level or below
(figure 1). This pump turns slowly requiring a number of minutes to accomplish purging
ALL air, if bubbles, skips, even slight pulsations in the oil flow from pumps bleeder port is
unacceptable and must be removed assuring proper oil flow to heater. Otherwise, the
flame sensor will not see enough flame and heater will lockout. NOTE: PUMP ASSEMBLY
MUST BE MOUNTED HORIZONTAL.
5. Connect 3/8” oil supply line from the supply tank through the filter (figure 1) to the pump
inlet located same side as bleeder port (figure 6). Continue oil supply line from pump
outlet to bulk head fitting secured to cabinet at left side of burner assembly (bulk head
fitting has fuel flex hose connecting it to burner).

Page 8OMNI by EconoHeat
Wiring
Figure 2 – Wiring Diagram
1. Wire 120V into main electrical box mounted on burner backside of heater cabinet with
separate circuit 20-amp protection using 12-gauge wire. Connect power line to black
wire and all whites (NEUTRAL or COMMON) together. IMPORTANT, Connect ground wire to
ground mounting point in main junction box (green screw).
2. Connect wires from main junction box to remote oil pump power, yellow to yellow and
neutral common white to white.
3. Wire low voltage thermostat into “T” marked terminals on oil primary control on burner (Box
on burner gun assembly with red reset button – figure 3).
Ducting
All unit heaters are designed with a condenser-type pressure propeller fan for air deliver, and
have been successfully field ducted (see specifications). Call factory for further assistance if
needed.
240 V

Page 9OMNI by EconoHeat
Oil Burner
Installation and use of this used oil burning appliance shall be in accordance with
the standard for the Installation of Oil Burning Equipment – ANSI/NFPA 31 – 1987,
and National Electric Code – ANSI/NFPA 70 – 1990 and the requirements of the
inspection authorities having jurisdiction.
WARNING
Igniter
Transformer
Air Band
(combustion air
supply adjustment)
Power Indicator
Run Indicator
Figure 3 – Oil Burner (Back View Closed)
Oil Primary Control
Air Filter
Air Pressure Gauge
Air Pressure
Adjustment Screw
Motor Air Compressor
Figure 4 – Oil Burner (Back View Opened)
Electrical Terminal Block
Pre-Heater Control Circuit BoardTransformer
Pre-Heater Block

Page 10OMNI by EconoHeat
Oil Valve Burner Motor
Compressor Flame Cone
Nozzle
Electrodes
Figure 5 – Oil Burner (Front View)
Figure 6 – Oil Pump Diagram
Oil Inlet
Oil Outlet
Mounting Flange
(3 or 4 bolt universal pattern)
Vanes/Carbon Plate
(Remove Cover)
Filter
Oil Primer Switch
Inline Breaker

P a g e 11OMNI by EconoHeat
Oil Flow Control Supply Pump has the ability to control flame even when various viscosities are
used- furnace or stove oil to 90 weight straight- flame remains stable
Figure 7 – Oil Pump Assembly
Oil Shut-off Valve
(Eliminates start delays due
to possible drain back)
Spin-On Filter
Oil Primer Switch
(Solenoid valve, on/off)
Adjustable
Motor Speed
(Initial set up only; Once
set, no adjustment
needed thereafter)
Inline Breaker
Oil Burner Technology
OMNI’s patented burner technology improves the efficiency of the oil burn process by
continuous stabilization of the oil viscosity. Optimum atomization (spray) is accomplished
by precisely pre-heating the oil and air prior to introduction to the combustion chamber.
The waste oil enters into the Oil Pre-Heater Block (figure 4) and is pre-heated to operating
thermo setpoint, then compressed air from the air compressor (figure 3) is mixed with the oil
prior to spraying out the nozzle similar to fuel injection, by breaking up the oil droplets into a
finer mist or spray (atomization). Electrodes mounted just above the nozzle (figure 5) provides
continuous electrical arc across electrode to electrode igniting the fine oil mist as it sprays out
of the nozzle. Once ignited the flame is forced into a swirl caused by the burners blower and
specially designed flame cone (figure 5) providing a very efficient and thorough burn of the
waste oil.
DC Motor
Oil Tank
Filter
Flow Control
Oil Pump
Internal Pump Filter
Air Compressor
On Burner
Oil Preheater
Inside Burner
Air Line to Preheater
Mixes with Oil at Nozzle
Suction Line
Pressure Line
Atomization Through Low Pressure
Preheat & Air Induction At Nozzle
Air Filter

Page 12OMNI by EconoHeat
Burner Components
• Igniter Transformer: (figure 3) Supplies high voltage to the electrodes generating electrical
arc igniting the oil.
• Oil Valve: (figure 5) energizes when burner is running and de-energizes when burner is not
running eliminating bleed back of oil out of the Pre-heater block.
• Air Band: (figure 3) Adjusts amount of air introduced into the combustion chamber. Air
band is adjusted at the factory for optimum performance, approx. ½ to ¾ inch open. NO
FIELD ADJUSTMENT REQUIRED unless in high altitudes application where minor adjustment
may be required.
• Oil Primary Control: (figure 3) Controls the oil burner ignition. Checks for flame in the
combustion chamber, if no flame is detected within 45 seconds, the oil primary will shutdown
the oil burner. To restart the unit, reset the red button on the oil primary.
• Oil Pre-Heater Block: (figure 4) Pre-heats the oil and air before entering combustion
chamber.
• Photo Eye: (figure 4) Senses flame in combustion chamber and signals oil primary when
no flame is present.
• Igniter Springs: (figure 4) Transfers the high voltage from the igniter transformer to the
electrodes (when door is closed)
• Air Pressure Gauge: (figure 3) Displays air pressure supplied by onboard air compressor.
• Air Compressor: (figure 3) Supplies air used within pre-heater block to aid in atomization
of the oil.
• Air Muffler/Filter: (figure 3) Filters air and muffles the sound generated by the compressor.
• Pre-Heater Control Circuit Board: (figure 4) Precisely controls temperature of the Oil Pre-
Heater Block and controls safety feature of not allowing burner to energize until oil has
established operating thermo setpoint or shutdown burner if Pre-Heater Block temperature
falls below shutdown thermo setpoint.
• Electrodes: (figure 4 and 5) Provides continuous high voltage electrical arc from electrode
to electrode igniting the waste oil as it is being sprayed out of the nozzle.
• Nozzle: (figure 5) Low-pressure nozzle for oil spray pattern.
• Flame Cone: (figure 5) Specially engineered flame cone forces the flame into a swirl pattern
improving the burn thoroughness.
• Burner Motor: (figure 5) Multitask motor turns the burner blower and integrated air
compressor.
• Air Pressure Adjuster: (figure 3) Adjusts the air pressure going to the pre-heater block.
Should be adjusted between 12 PSI and 13PSI as indicated on the Air Pressure Gauge on the
burner for thorough burn of the waste oil. Note: In order to insure proper air adjustment,
air gauge must read 0 when burner is cycled off or powered down.
• Oil Pressure Adjustment: Adjust flame length in the heater combustion chamber viewed
through the inspection port located directly above the burner gun assembly by increasing
CW or decreasing CCW the adjuster located on the oil delivery pump (figure7). The adjuster
increases or decreases the pump motors RPM, which increases or decreases the delivery
of fuel to the burner. When you increase or decrease the fuel to the burner, you will notice
the flame length will increase or decrease. Adjust flame length so flame is just slightly less
than halfway down main combustion chamber tube.

Page 13OMNI by EconoHeat
IMPORTANT:
• Power Indicator: (figure 3) Indicates when power is present at the burner.
• Run Indicator: (figure 3) Indicates that the burner is ready for operation after the initial pre-
heat time of approx. 5 minutes from initial power up.
1. IMPORTANT – Prior to starting the unit, pre-fill the filter and fuel line with oil to assist priming
procedure. Oil pump motor turns at low RPM’s and would take significant time to complete
priming process if not pre-filled. Make sure the oil supply line fittings are air tight. Vacuum
leaks are notoriously hard to find. Pressurizing the line with oil in it can help to locate leaks.
2. Proper draft. Draft is the gases traveling through the heater and out the stack or flue. If
exhaust fans are present in your building, chances are a draft inducer will be needed. Call
our factory or see our website for help, www.econoheat.com
3. During the initial power up process the burner is locked out from energizing until the oil has
been properly pre-heated to operating thermo setpoint, approx 3 to 5 minute duration.
Once the oil has been pre-heated, power is then applied to burner components and oil
pump.
4. Making sure the thermostat is turned off, apply power to the burner. Switch burner main
power switch to ON position. After allowing the oil pre-heater time to establish temperature
setpoint, approximately 5 minutes. Jump the “T” terminals on the Oil Primary Control (figure
3). Once the burner is running, temporarily jump the “F” terminals on the Oil Primary. This
will allow the burner to run during the pump priming process.
5. Priming the oil pump: Open bleeder valve one turn until all air is expelled (figure 6). This
may need to be done twice to insure all air is removed. IMPORTANT: When fully purged and
flame is established remove temporarily jumpers on “F” terminals of the Oil Primary to allow
safety features of the unit to operate properly.
6. Adjust air supply of integrated air compressor to 12–13 P.S.I. This is factory preset, however,
due to freight handling settings may be compromised.
7. Combustion air band (figure 3) should be open approximately 1/2” or until flame is clear
yellow, not orange. Opening the air band too far may cause delayed in starting or even
prevent the flame from starting.
Inspect flame length through inspection door located above burner gun assembly. End
of flame should reach no further than ½ way down combustion tube. To accomplish this
flame length, use adjustment knob on opposite side of oil pump. NEVER ATTEMPT TO START
HEATER WHEN COMBUSTION CHAMBER IS HOT AND A DELAYED START.
Initial Start Procedure

Page 14OMNI by EconoHeat
WEEKLY
• Drain water from storage tank.
MONTHLY
• Check your ash accumulation for best performance, remove if excessive (the size of unit,
type of oil and run time are all contingent factors).
• Change or Replace Spin-On Filter or Filter screen located in the pancake style housing (figure
14 below). NOTE: every application is different and may vary depending on contamination
of oils being used.
ONCE EACH SEASON (or more often, depending upon usage or contamination of oil)
• Open the burner side clean-out door to access and clean flame cone (figure 5 above,
and figure 8 below).
• Open the swing out doors on both sides of the furnace. The swing out door opposite of
the burner assembly requires the removal of the access panel allowing simple entry to the
combustion chamber and heat exchanger(s) to vacuum out the accumulated ash & soot
(hepa filter recommended) (figure 12 below).
• Clean Suntec pump filter. Remove pump cover for access (figure 13 below). CAUTION: Be
careful of gasket.
• Clean air compressor filter element.
YEARLY
• Clean flue pipe stack-to loosen soot remove stack at top of heater and tap thoroughly.
Then vacuum upper heat exchanger(s).
• Inspect electrode adjustment (figure 10 below). Due to erosion, adjustment may change.
• Replace nozzle every 3-5 years depending on usage (figure 5 above, and figures 9, 10 and
11 below). Will lose efficiency due to erosion. This can be accessed by swinging the burner
clean out door open (figure 8 below).
• IMPORTANT: TO TURN POWER OFF, Remove electrical plug from heater cabinet to burner.
Remove 9/16” burner door securing nuts, swing open the burner side clean-out door.
Remove nozzle with 5/8” socket (figures 8 and 9 below).
ELECTRODE ADJUSTMENTS
Electrodes are adjusted at time of manufacture. However, they should be check periodically
and at time of installation, to be sure they are set as noted in the following dimensional
drawing. Swing burner clean out door back for inspection (figure 5 above, and figures 10
and 11 below). CAUTION: TURN OFF MAIN ELECTRIC SUPPLY SWITCH BEFORE CHECKING OR
ADJUSTING ELECTRODE SETTING.
NOZZLE POSITION IN RELATION TO ENDCONE/BURNER TUBE
Tip of nozzle must be ¼” ahead of inside radius of end-cone. If nozzle is behind inside radius
of end-cone, coking will occur and end cone can become clogged (figure 10 below).
Maintenance Schedule

Page 15OMNI by EconoHeat
IMPORTANT NOTE: be sure nozzle is centered, if nozzle is higher than center, press nozzle down
to bottom out pre-heater stand.
To adjust, open burner clean out door (figure 8 bleow), loosen Preheat Sink securing nut and
set screw, push fore or aft as needed. WARNING: This adjustment is done at the factory and
should not be moved unless figure 8 dimensions have been altered.
Figure 9 – Burner Door View
OWH-350 model pictured above. Each model will vary slightly.

Page 16OMNI by EconoHeat
Pre Heater Oil Block
Pre-Heater
Control Card
Electrodes
Nozzle
Thermocouple
Figure 11 – Pre-Heater Block Detail (Removed From Burner for Clarity)
Snap Switch
Figure 10 – Electrode Adjustment Detail
When cleaning, inspect all
three pieces thoroughly. When
disassembling and reassembling
nozzle, keep facing up as shown.
Figure 10 – Nozzle Assembly Detail

P a g e 17OMNI by EconoHeat
Figure 14 – Oil Filter (Spin-On Filter above,
Pancake Style Filter below)
Remove 4 bolts for access to strainer filter.
CAUTION: must be careful not to destroy the
inner gasket during removal of the housing.
Figure 13 – Pump Strainer
Figure 12 – Combustion Chamber and Heat Exchanger Clean-out Door
OWH-350 model pictured above. Each model will vary slightly.

Page 18OMNI by EconoHeat
♦Most Likely •Less Likely ♣Least Likely
Symptom Cause Remedy
1. Heater shuts
o
♦Manual reset ♦
R
equiring manual restart
b
reset button on.
2. Loss
o
prime overnight ♦
V
acuum air leak i
n
uel line ♦Check all

uel connections. Tight
en 
ittings.
W
on 
t hold vacuum ♣Plugged pump screen ♣Check pump screen, m
a
need cleaning-to access, remove pump cover
IS TANK EMPTY? •Plugged
  e
r or tank oil empt

•Clean

ilter. Using vent port, reprime pump (See Figure 6 & 7).
3. Fails to start. ♦
V
acuum Leak ♦Open bleeder port i

air present. Check and tighten

ittings.
♦Inadequate Fuel Suppl

♦Clean

ilter. Check all

uel connections. Tighten

ittings.
•No Pressure •Check, m
a
need cleaning

to access, remove pump cover.
•Using vent port, reprime pump (See Figure 6 & 7)
•No Pre-heat •Be sure all wiring to pre-heater is tight-no loose connections.
•Bad
 e
rod-
R
eplace. Continuit

at terminals.
•Auto start circuit not

unctioning •Check circuit control board and replace i

necessar
y
(Call Factor

•Check continuit

at terminals
o 
irerod limit snap switch.
R
eplace i

needed.
•No Arc •Check springs to electrode rod adjustment (under tr
an
ormer)
make sure t
he

make good contact. Open burner door and make
sure electrode tips ar
en

t touchi
n
 
lame cone.
R
eadjust.
•No Air Pressure •Check pressure regulator and adjust. Check air suppl

line

or
restrictions or leaks. Pull compressor cover and inspect carbon
vanes. M
a
need to replace. Check

ilter, clean i

needed.
4.
R
educed air pressure, ♦Gauge m
a
be bad. ♦
R
eplace gauge.
cannot increase. ♦Intake

ilter mu

ler is plugged ♦
R
emove & Clean with carburetor cleaner, dr

thoroughl
y
Do Not Use.
with dust or dirt.
♣Compressor vanes m
a
be worn. ♣
R
eplace carbon canes.
•Exposed to water. •
R
emove cover, clean rust with emer

cloth.
5. Hard starting diminished ♦Partia

plugged
  e
r. ♦Clean

ilter. Using vent port-reprime pump (See Figure 6 & 7)

lame. ♣Out
o 
uel ♣
Re
ill Storage.
♣No oil to burner ♣Clean pump screen-
R
emove pump cover. Using vent
port, reprime pump. (See

igure 6 & 7)
•
R
estriction in nozzle usuall

onl

•
R
emove nozzle and check

or

oreign objects. (See Figure 9 and 11)
when initiall

installed. New lines •Aluminum Block Pre-heater inside burner should not build
m
a
have

oreign material in them. up carbon. I

carbon is present, pre-heat circuit is mal

unctioning.
Thermocouple heat sensor wire could have open circuit.
Heat control board m
a
have blown circuit and circuit boar
d 
use.
Inspect both and replace either i

needed. (See Figure 11).
•Air band open t
oo 
ar •Close air band

while viewing

lame; open air band
slowl

until combustion chamber is clear, not orange.
6. Heater
cc
es

requentl

♦Heater over

iring. ♦Investigate and locate reason

or over

iring. I.e., nozzle
without thermostat eroded, pump not

unctioning properl

, decrease pump motor speed.
temperature setting being (S
ee  
or rem
ed
)
achieved in area to be ♣Temperature setting wrong
heated. On high limit

an
a
et

switch. ♣Check temperature setting and adjust as necessar
y
•High limit
a
et

switch bad •
R
eplace high limit

an
a
et

switch.
7. Heater rumbles and ♦Pump setting wrong ♦Pump not

unctioning properl

-over

iring. M
a
need
R
PM readjust.
excessive heat blow back
R
eset

lame slightl

less than ½w
a
down tube combustion chamber.

rom

lame vision port. Use adjustment knob on pump motor. (See Figure 7).
♣Dra

t incorrect. I

proper dra

t♣Set dr
a
t. Clean out combustion chamber and exchangers
can
t be achieved, heater could
o
ash. Check dr
a
t-reset i

needed.
have excessive amount
o
ash and
w
on 
t allow
s
icient dra

t.
8. Heater establishes

lame ♦Phot
oe 
e cant
ee 
lame. ♦Clean photo
e
e
which is smoked up
b
back dr
a
t smoke.
but locks out or shuts
o
.♣Due to back dr
a
t. Flame end ♣Swing open burner door and clean ash buil
ds 
rom

lame
Need to reset primar
y
cone m
a
have ash. end cone. (See Figure 5 & 8).
•Flame too small •Increase pump motor speed (See Figure 7).
9. Proper dr
a
t setting ♦Negative dr
a
t in building ♦M
a
need to install power vent
/
dr
a
t inducer

s in stack.
cannot be achieved or exhaust

ans present. (See Figur e   or wiring).
♣Excessive ash buil
ds/
Heater ♣Clean ash and soot

rom combustion chamber and heat
exchangers.
10. Poor or reduced heat ♦Flame too small ♦Nozzle m
a
be plugged with debris-usuall
 a
ter

ilter is cleaned.
production. ♣Entir
e
uel suppl

m
a
be plugged. ♣Clean

ilter both, oil strainer and oil pump screen.
•Excessive ash buildup exchangers •Clean ash

rom combustion chamber and exchangers.
•Through vision port, check

lame •M
a
need to readjust pump
R
PM. (Use knob on pump motor).
to see i
 
lame is smaller than usual. (See Figure 7).
Troubleshooting

Page 19OMNI by EconoHeat
OWH-350 Fifteen (15) Year Limited Warranty
EconoHeat (manufacturer) warrants to the purchaser of Unit Heaters listed above will be free
from defects in materials and workmanship for the durations specified below, which duration
begins on the date of delivery to the customer. Customer is responsible for maintaining proof
of date of delivery.
If return is deemed necessary for warranty evaluation and determination of repair or
replacement, unit heater is to be sent to the factory with freight prepaid. EconoHeat reserves
the right to determine appropriate action for repair or replacement.
No parts will be accepted by EconoHeat without RA# (return authorization number) clearly marked
on outside of shipping package. Obtaining RA# requires model and serial numbers, description
of part being replaced and nature of defect. Call factory to receive RA#.
Warranty Covers:
• Combustion chamber and heat exchanger fifteen (15) years limited, full repair or
replacement (parts only)
• Oil heater block, twenty (20) years (parts only)
• Oil heater block controller PCB, three (3) years (parts only)
• All other components, one (1) year (parts only)
This warranty is void if:
• Warranty registration card is not returned within sixty (60) days of purchase
• Any part or component subject to abuse or altered from original manufactures specifications
• Installation not in accordance with instructions
• Has not been properly maintained, operated or has been misused
• Wiring not in accordance with diagram furnished with unit heater
• Unit heater is operated in the presence of chlorinated vapors
• Air through unit heater is not in accordance with rating plate and specifications
• Target plate or clean out door warped/discolored from excessive heat
Warranty is limited to the original purchaser and is non-transferable.
The above warranty is in lieu of all other warranties expressed or implied. EconoHeat does not
authorize any person or representative to make or assume any other obligation or liability that
is not in accordance with above warranty. EconoHeat is not responsible for any labor and/
or shipping cost, unless prior authorization in writing has been obtained.

Page 20OMNI by EconoHeat
NOTE: Combustion Chamber Warranty is specific to material and workmanship. Workmanship
means EconoHeat warranties the welds are good and will hold. Material means they will not
corrode through due to sulfur in the ash that accumulates during operation. Warranty does
not apply to units that experience overheating stress cracks. These are not incurred because
the materials are inadequate for the application nor are they results of a weld breaking lose
because of bad penetration, which is easily recognized by the metal left beneath the weld.
These cracks occur as a direct result of (1)improper draft, either by inadequate initial installation
and setup, which requires (a) establishing a proper draft during installation (b) back draft has
occurred due to ash buildup, backing up hot gas passageways in either the exchangers, the
stack, or both. (2) Over firing by setting oil supply pressure too high (see manual for proper
setting) these are all cases of thermal overload.
*Under normal use only. If misuse or abuse is deemed apparent after inspection, warranty is void.
Warranty Card
Please fill out, tear off and return to manufacturer within sixty (60) days of purchase, or warranty will
not be valid. Please print or type.
Date of Purchase:
Serial #:
Model #:
Customer (Company) Name:
Address:
City: State: Zip Code:
Dealer:
Address:
City: State: Zip Code:
Installed By: