1
Ch
art 1: Natural Gas & Propane (LPG)
Firing Rate
Max
120 Vol
t
Revent, Inc.
Manual for: SU-3 Gas Burner For Revent Ovens
343,000 BTU/H
The burner shall be used only with NATURAL GAS or PROPANE (LPG).
Warning: If the following instructions are not followed exactly, a fire or explosion may result, causing
property damage, personal injury or death.
•
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
- WHAT TO DO IF YOU SMELL GAS? –
•
Do not try to light any appliance.
•
Do not touch any electrical appliance.
•
Do not use any telephone in your building.
•
Immediately call your gas supplier from an outside phone. Follow the gas supplier’s instructions.
•
If you cannot reach your gas supplier, call the fire department.
•
A qualified installer, service agency or the gas supplier must perform installation and service.
•
All installations must be made in accordance with all state and local codes, which may differ from
instructions in this manual.
•
The installer should inform and demonstrate to the user the correct operation and maintenance of the
appliance.
•
The installer shall also inform the user of hazards of flammable liquids and vapors and shall remove such
liquids and vapors from the vicinity of the burner.
•
The installation adjustment data trap (or label) supplied shall be filled in and affixed to the burner or the
covered appliance.
Burner
Model
SU-3
These instructions should be affixed to the burner or adjacent to the heating appliance.
Manufactured by Revent, Inc.
100 Ethel Rd. West
Piscataway, NJ 08854
Length
of
Flame
Tube
5 ¼”
BTU/H
343,000
Primary
Electric
Input
60 Hz
1 Ph
Secondary
Electric
Input
24 Volts
Total
Watts
150
Max
Total
Amps
3 or
less
Gas
Conn
.
½” or
1”
2
Control System: Honeywell S89F with 34 second Pre-Purge.
Gas valve: Honeywell VR 8305
The system uses a remote ignition system using a separate Ignition Transformer.
The SU-3 Gas Burner is a fully automatic, flame retention burner and is suitable for combustion of natural gas.
Altering the head position, air shutter and gas pressure can change the firing rate. No orifice is used in Revent
applications. The same gas valve is used for both natural gas and Propane (LPG) without any conversion kit.
The combustion air can be adjusted for proper O2 or CO2 by the dial located at the rear of the burner housing,
which allows the air to flow more or flow less within the burner.
Two electrodes act as a sparker and a flame rod (See Fig. 1). Flame rectification by this flame rod monitors
the continued presence of the burner flame.
Warning: Should overheating occur, 1) shut off the manual gas shut off valve to control the appliance;
2) DO NOT shut off the control switch to the pump or blower
This power gas burner is designed to convert oil and/or coal fired boilers and furnaces to a gas-burning
appliance. The conversion must conform to local codes. In the absence of such codes, the American National
Standard for the Installation of gas conversion burners, Z21.8A-1990 and the National Fuel Gas Code ANSI
223.1-1992 or current standards should be applied.
Fig. 1 Electrode and Flame Sensor Dimensions
AIR FOR COMBUSTION
If the oven room is unusually tight, or if there is a ventilation fan, it is recommended that the combustion air
be supplied to the oven room through intakes from the outside of the building. The intakes must terminate
facing down in order to avoid obstruction from rain, snow, leaves, etc. Openings must have one square inch of
free area per 10,000 BTU input rate (see Example 1).
Example 1: 280,000 BTU/hr firing rate
2
(
1
in
(
343,000
BTU / hr)*
)
10,000BTU / hr
=
34.3
in
2
3
CHIMNEY REQUIREMENTS
The chimney should extend at least 3’ above a flat roof or the highest roof ridge (see Fig. 2) and be free in a
radius of 30’ of objects such as tree limbs, other buildings, etc, which may cause a down draft. The chimney
should be lined as required by the local Gas Company or local codes.
Some utilities require new chimney liners for all gas installations. Use a corrosion resistant chimney liner
(approved for gas service) of the same size as the vent pipe.
Fig. 2 Chimney and Fresh Air Dimensions
INSTALLING THE BURNER
Picture 1: BODY FLANGE:
First, install the gasket and boiler flange to the boiler. For heat exchangers with a
diamond stud pattern, one allen screw on the flange should be on the top, slightly to
the left of the 12 o’clock stud. The second screw should be on the right (slightly
above the 3 o’clock position stud). Tighten all the nuts equally. Make sure that the
allen screws are backed out, to allow enough clearance. Then, insert the SU-3 gas
burner into the boiler.
Once the burner is inserted and pushed all the way forward, tighten the allen screw
on the top of the flange. This screw MUST go into the groove that is on the burner
housing.
Tighten the second allen screw, located on the right side of the flange. This screw
should be tight.
Seal off any free openings with either high temperature cement or high temperature
silicone.
4
Ch
art 4: Pipe Capacity Table*( x 1,000
BTU’s
)
Nominal diameter of pipe in inches
¾” 1” 1 ¼” 1 ½” 2”
15’
172 345 750
30’
45’
60’
75’
77
155 345 545
90’
105’
65
131 285 450 920
120’
150’
180’
GAS SERVICE & PIPE CAPACITY
Before connecting the burner to the gas supply, insure that the gas pipes and service meter are large
enough to permit the additional load of the gas burner (see Chart 4).
Pipe Length**
120 241 535 850
99 199 435 700
86 173 380 610
70 141 310 490
120 270 380 850
109 242 300 780
100 225 225 720
* Using 0.6 Specific Gravity Gas and a Pressure Drop of 0.3” of Water Column
** Each 900 elbow counts as 3’ for the purpose of these calculations
CHIMNEY LINER, DRAFT REGULATOR AND VENT PIPE
Some utilities require new chimney liners for all gas installations. Use a corrosion resistant chimney liner
(approved for gas service) of the same size as the vent pipe. Use a double swing draft regulator, listed by CSA
or U.L. Draft over fire for Revent ovens should be maintained as –0.12” W.C. by adjusting the regulator when
the burner is fired. The installer should follow the barometric draft regulator manufacturer’s instructions for
complete details for installations and adjustments. A movable internal damper is not permitted on gas
installations. The vent pipe should extend only to (but not beyond) the inside wall of the chimney.
Refer to the oven manual for the proper flue pipe size and draft recommendations.
GAS PIPING TO BURNER
It is advisable to run a separate gas line from the meter to the gas burner to avoid pressure drops. Refer to
the above Pipe Capacity table for the correct sizes. ALL PIPING MUST CONFORM WITH
5
LOCAL CODES. Use black steel pipe and malleable fittings (do not use cast iron parts) with a suitable pipe
dope which is resistant to liquefied petroleum gases.
Piping should consist of:
1. A shut off valve approximately 6’ away from the unit.
2. A 1/8” plugged NPT tapping for gas pressure measurement preferably on the manual shut off valve (as
shown or anywhere between the gas valve and the shut off value).
Note: The manual shut off valve and tapping are NOT part of the SU-3 Gas Burner. Please make sure
you conform to local and state codes.
3. A gas union.
4. A drip pipe.
Caution: The gas valve should not be subjected to more than ½” PSIG. Therefore, the burner should
be isolated during high-pressure gas leak tests. The appliance and its individual shut off valve must be
disconnected from the gas supply piping system during any pressure testing of that system at test pressures
in excess of ½ psig. The appliance must be isolated from the gas supply piping by closing its individual
manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to
or less than ½ psig.
The below dotted lines represent field installation.
Fig. 3 Gas Burner Piping*
*The dotted lines represent field installation.
ELECTRIC WIRING
These gas burners are manufactured for use with 120 volt, 60 cycle, single-phase electric current. The
installation must comply and be grounded in accordance with the National Board of Fire Underwriters and
National Electric Code ANSI/NFPA No. 70-1987 (or the latest addition). All applicable local codes should
be followed as well.
Installation wiring should be wired through each limit control or interlock, while operating controls
(like the thermostat) should be treated as 24-Volt wiring. The burner has its own 24 Volt AC power supply.
Do not add a 24 Volt AC transformer for the burner wiring. Do not use the 24 Volt transformer found on the
burner to power other items in the heating system, such as spill switches, etc. Follow the wiring diagrams
provided below:
6
Fig. 4 Wiring Diagram for Honeywell S89F
SEQUENCE OF OPERATIONS
Capable Controls 8X-89E, F
1.
1 CR contacts close.
2.
Limits close.
3.
Blower motor starts as the 24 Volt transformer powers the airflow switch.
4.
Power from the airflow switch to the S89F control initiates 34 second pre-purge.
5.
At the end of the pre-purge, the spark is energized for 4 seconds. At the same time, the 24 Volt
transformer powers the gas valve, allowing the fuel to flow.
6.
Within 4 seconds, the flame should be established and proved. The spark will shut off and the control
will hold power to the gas valve until the limits open and the burner stops firing.
7.
If the flame is not established, the blower motor continuously runs.
8.
To restart, power should be interrupted for five minutes. Then turn on the power to start this sequence
again.
7
Commissioning the Burner
Once installed, a higher or lower firing rate can be achieved by raising or lowering the manifold
pressure by +/- 0.3”. Pressure changes can only be made when the burner is running. The typical working
manifold pressure for natural gas is 2.8 Inches of Water Column (“W.C.), or 2.2 Inches of W.C. for
Propane (LPG). The maximum inlet pressure at the gas valve is 11“ W.C.; the minimum is 5“ W.C. Refer to
Chart 6 and Chart 7 on page 8. (See page 9 of this manual for further details on burner operation).
Clock the meter to determine the firing rate. The firing rate should be +/- 3% of the oven
manufacturers’ specifications for the oven. Check the oven manual for further details.
The head is set at the factory for Revent applications. In most Revent ovens, it is not necessary to
adjust the head. Use a combustion analyzer and check the CO2 (or O2) and carbon monoxide levels. Adjust
the air as necessary (See below :)
Remove plastic cover, using 4 mm
Allen key to loosen the bolt.
Caution: Do not lose bolt.
Head
Adjustment
Air
Adjustment
Turning the Air Adjustment dial clockwise opens the air shutter and increases the air; turning the air
8
adjustment dial counter-clockwise closes the air shutter and reduces the air.
9
Chart 6: Firing Rates for Various Oven Models - Natural Gas
Pressure
Setting
Chart 7: Firing Rates for Various Oven Models - Propane (LPG)
619 318
,000 2.0” 7 1
620 375
,000 2.5” 13 1
724 343
,000 2.2” 16 1
Adjusting the Burner
Using a combustion analyzer, check the following readings:
If CO2 is greater than 9.5% (O2<3.5%); Open Air Shutter
If CO2 is less than 8.8% (O2> 5%); Close Air Shutter
Carbon monoxide levels should be below 400 ppm; 100 ppm or less is ideal. Check local codes for emissions
requirements.
Note: if any adjustments are made, it is important to recheck the firing rate and combustion analysis.
Oven Model
BTU/hr Manifold
Air Setting
Head
619 318,000 2.5” 7 1
620 375,000 3.3” 1 1
724 343,000 2.8” 16 1
Oven Model
BTU/hr Manifold
Pressure
Air Setting Head
Setting
1
LIGHTING IN
STRUCT
ION
S
To light the SU-3 Gas Burn
er
R
eset, if Flame Lockout Occu
rs
B
URNE
R OPERAT
ION: Record
the Readings at Steady Stat
e
o
1. Set the thermostat to the lowest
temperature
2. The control knob on the gas valve
should be in the “OFF” position
for at least five minutes.
3. Rotate the control knob counterclockwise to the “ON” position
and set the thermostat to the
1. Turn the thermostat off, or turn the main power off
2. Wait five minutes
3. Turn the main power on
To shut the burner off
1. Rotate the control knob on the gas valve to the “OFF”
position
2. Set the thermostat to the lowest temperature
desired temperature settings
Burner Operation
Before turning the burner on, check for gas supply leaks. Check the wiring diagrams; install
manometers before and after the gas valve. Keep the observation port of the boiler or furnace open. Follow
the instructions on the nameplate of the burner to turn it on. Follow the sequence of operations for the control
(see pages 8 and 9). Record the readings below.
Draft over fire at steady state (should be –0.12 to -0.24 “W.C.)
Natural Gas CO2 % = (9.0% to 9.8%) or O2 % = (5.0% to 3.5%)
Propane (LPG) CO2 % = (10.5% to 11.5%) or O2 % = (5.0% to 3.5%)
Stack Temperature (300
F minimum, 550oF maximum)
Incoming Gas pressure = “W.C. (minimum 5”, maximum 11”)
Manifold pressure = varies - check oven manual
Carbon Monoxide in flue ( less than 100 PPM ideal; should not exceed 400PPM)
Maintenance Instructions: TO BE FIXED/ATTACHED NEAR BURNER
Twice a year, a qualified service agency needs to be contracted for other than routine maintenance.
1. The blower motor is the only moving part. It does not require lubrication, since the ball bearings have
been permanently lubricated.
2. The user should do periodic visual checks of the burner and the flame.
3. Laundry lint or dog and/or cat hairs should not go inside the blower. If they are seen, they should be
removed after disconnecting the power to the burner and cover parts should be installed before starting the
burner.
4. Keep the area around the conversion burner clear and free from combustible materials, gasoline, and
other flammable vapors and liquids.
5. No obstruction for the flow of combustion and ventilating air (ref. Page 3).
10
C
ondition Solutions
Honeywell control d
efective after above tests. Replace
Polarity reversed Check power feed for broken polarity
Bad earth grounding Fix the ground wire
Gas pressure is too low Ch
eck the gas pressure and adjust to proper pressure
Gas pressure is too high. Use manometer and readjust the pressures.
Blocked Flue Check draft and cl
ear flue of foreign materials.
Burner is not correctly adjusted. Readjust with combustion analyzer.
The burner is dirty. Cl
ean the burner.
Defective chimney Check and change if necessary with liners.
the cable.
Excess air is too
high or too low. Adjust air
shutter.
The gas holes are clogged. Cl
ean them.
The fresh air
intakes are too small. Check and readjust.
The burner head is out of position. Check and readj
ust.
Increase the firing rate so that the st
ack temperature
Trouble shooting:
There are three factors to operate the gas burner properly:
1. Electricity {(main Power 120V/60 Hz /1 Ph)( secondary 24V)}
2. Gas flow (Incoming pressure should be 10” w.c. with proper gas line without pressure drop during
burner operation).
3. Combustion air.
Check these three items properly before proceeding in detail for other problems.
1. Burner motor runs and:
No flame after pre-purge & no fuel indicator (where
applicable)
No flame, fuel indicator on (where applicable),
faulty ignition transformer or spark separately
2. Burner locks out after 4 seconds
3. Pulsation at start
4. Pulsation during operation
Check 24V feed to airflow switch & after airflow
switch to control. Fix or replace the airflow switch.
If there is no secondary power, then replace the
24Vtransformer.
Check ignition transformer, electrode, cracked
electrode or gap. Fix or replace.
First, check ionization electrode, ionization cable
(for cracks) and boot. Fix as needed.
First, check the burner head location with respect to
the end of the flame tube. Adjust as necessary.
5. Burner locks out
Ionization current is too low.
6. The CO content is too high
7. Condensation in the heat exchanger
Firing Rate is too low.
Check current. Minimum 0.8 micro amps. Check
position of ionization electrode and the condition of
is 350o F or HIGHER. Insulate the chimney.
11
1 Blast
Tub
e 50331120 16 Cover Plate - Adjustmen
t
Air Regulation
50331135
2 Flange Gaske
t 50331132 16A Cover Plate - Adjustmen
t
50331136
3 Body Flan
ge 50331122 17 Scale (adjuster)
Nozzle Line
50331137
4 Front piece – Housing 50331123 17A Scale (adjuster)
Air Regulation
50331138
5 Rear piece – Housing 50331124 18 24 Volt Transformer 50717001
6 Fan Wheel - 146 m
m 50331125 19 Safety Contro
l
50301601
7 1/6 HP PSC Blower mot
or 50727000 20 Plastic Cover Plate 50727012
8 Shielding Plate Housing 50331127 21 Socket Head Bol
t
50331142
9A Silenc
er 50331128 22 Airflow Switc
h
50727011
10 Air Regulation Plat
e 50331129 23 Ignition Electrode 50727004
11 Air Damper 50331130 24 Flame R
od 50727005
12 Air Regulation Adjustmen
t
s
crew
50331177 25 Retenti
on head, complet
e 50331146
13 Adjustment Screw – No
zzl
e
Line
50331180 26 Union 50331147
14 Ionization Cabl
e 50727002 27 Gas Valve 50302101
15 Ignition Transformer w/
50313925
Power On light 50331149
15 Ignition Transformer ONL
Y
Fuel On / Air proving
Light
50331150
ITEM
PART DESCRIPTION
Heat Wise SU-3 Spare Parts List
REVENT
PART #
ITEM PART DESCRIPTION
Nozzle Line
Honeywell S89
M6 X 170mm
Honeywell
REVENT
PART #
Cable
N/A
50727027
N/A
Rev. Jan 2014
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