Reznor RAD 235 Installation and operating manual

Form No. RZ-NA I-RA/D 140/235 (Version A)
Obsoletes Form I-RA/D 140/235
REZNOR® USED-OIL-FIRED
HEATERS AND BOILERS
Installation
and
Reference Guide
Heater Models
RA 140
RA 235
RAD 140
RAD 235
CSACertified to Electrical and Fuel Burning requirements only.
P/N 110318 Rev 2

Form I-RA/D 140/235 (Version A), Page 2
IMPORTANT
Notice to Owner
and Installer
To ensure the long term benefits of burning your used oil in a Reznor®Used-Oil-
Fired Heater, it is necessary to become familiar with the correct installation and
maintenance of your new furnace. Before installing or operating this heater, make
sure you have read and understand this manual.
IMPROPER INSTALLATION OR LACK OF MAINTENANCE
WILLVOID THE WARRANTY.
The most critical sections of this manual are
• Correct Draft Over Fire - Page 21
• General Maintenance Requirements - Page 24
Identical to any gas or oil burner, without adequate draft over the fire, the combustion
gasescannotescaperesultingin an overheated combustion chamber. Even if the burner
is installed correctly and adequate draft achieved, a flue passage blockage will affect
the draft. Burning used oil is similar to burning wood.Afine gray ash accumulates in
the chamber and flue passages. This accumulation of ash will eventually affect the
draft. It is important to remove this ash before the draft is affected.
Thesetopicsarediscussedindetailonthepageslistedabove.Pleasefamiliarizeyourself
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 yourheater.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 3
Table of Contents by Page No.
INSTALLATION
Introduction .....................................4
Use ............................................................. 4
Codes and Regulations .............................. 4
Warranty..................................................... 4
Safety Warnings .......................... 5-6
Conventions Used in this Manual.............. 5
Secondary Heat Source.............................. 5
Fuels........................................................... 5
Hazardous Atmosphere.............................. 5
Venting....................................................... 6
Air for Combustion.................................... 6
Non-Compliance........................................ 6
Unpacking and Inspection ........... 6-7
Parts Carton ............................................... 7
Heater Placement............................8
Minimum Clearances from Combustibles. 8
High Altitude Installation..................9
Fuel Tank, Pump, and Supply
Lines ................................... 10-12
General Requirements ............................. 10
Fuel Tank ................................................. 10
Pump.........................................................11
Supply Lines Installation ..........................11
Typical Installation .................................. 12
Mounting the Heater......................13
Weights .................................................... 13
Suspension ............................................... 13
Venting the Heater................... 14-16
Warning and Guidelines .......................... 14
Detailed Venting Requirements ............... 15
Draft Regulator ........................................ 16
Installing Ducts..............................17
InletAir Duct ........................................... 17
Discharge Duct ........................................ 17
Main Power Installation .................18
Thermostat Installation..................18
HEATER START-UP
System Check ...............................19
Priming and Leak Check ......... 19-20
Start-Up Procedure ................. 21-23
MAINTENANCE
General Maintenance Requirements &
Schedule...................................24
Maintenance Procedures ........ 25-35
Cleaning the Supply Line Filter and Internal
Pump Screen ...................................... 25
Cleaning the Burner Oil Strainer ............. 26
Inspecting/Cleaning the Heat Exchanger/
Combustion Chamber ................... 27-28
Replacing Compressed Air Filter ............ 29
Removing Burner & Cleaning End Cone,
Nozzle and Electrodes ....................... 29
Electrode Adjustment .............................. 31
Cleaning Oil Pre-Heater System.............. 32
Cleaning Cabinet ..................................... 33
SERVICE
General Operation................... 34-35
Troubleshooting ....................... 36-47
Oil Burner Troubleshooting..................... 36
Troubleshooting Guide ............................ 37
Location of Components ......................... 38
Troubleshooting Charts ...................... 39-47
APPENDIX
Wiring Diagram........................ 48-49
Hour Meter/Cleaning Record.........50
INDEX ................................... 51

Form I-RA/D 140/235 (Version A), Page 4
Installation
Use
This heater is for commercial or industrial use only.
Theheater should be installed by an experienced installer thoroughly trained
and experienced with the installation of oil-fired appliances. The installer
should be familiar with the special precautions necessary in the handling
and storage of used automotive oils which may contain small amounts of
gasoline.
Installation must comply with:
In the United States
The Standard for the Installation of Oil Burning Equipment NFPA
31
The National Electrical Code NFPA 70
Federal, State, and local municipal codes
In Canada
CSA Standard B139-M91, Installation Code for Oil Burning
Equipment
CSA Standard C22.1-Canadian Electrical Code, Part 1
Federal, Provincial, and local municipal codes
Installation, operating and maintenance permits may be required
from regulation authorities covering environmental quality, fuel,
fire and electrical safety. Municipal permits may also be required.
Regulation requires that only used oil generated on the premises of
the owner may be burned in this equipment unless written authori-
zation is obtained from the regulatory authority.
WARRANTY IS VOID IF ....
1. Heater is not installed in accordance with these instructions and
applicable codes and ordinances.
2. Wiring is not in accordance with diagram furnished with the heater.
3. Heater is operated in presence of chlorinated vapors.
4. Air through the heater is not in accordance with the rating plate.
5. Ducts are attached to RA (fan) model
6. Heater is not maintained in accordance with maintenance require-
ments. FAILURE TO CLEAN THE COMBUSTION CHAMBER ON
A REGULAR BASIS.
7. Other-than-specified fuel is burned.
8. Heater is operated at elevations greater than 3,000 ft (914M) above sea
level without factory approved modifications.
9. Fuel input capacity is altered.
Introduction
Codes and
Regulations
Warranty
For Warranty information,
refer to the Limited Warranty
form in the Owner’s Envelope.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 5
Conventions Used in this Manual
Hazard Intensity Levels
DANGER: Failure to comply will result in severe
personal injury or death, and/or property damage.
WARNING: Failure to comply can result in severe
personal injury or death and/or property damage.
CAUTION: Failure to comply could result in minor
personal injury and or personal damage.
NOTE:Additional Warnings are also included throughout this manual.
CAUTION: These heaters are designed to provide
economic disposal of used oils. Used oil is an inconsistent
fuel and may contain water and/or foreign materials
which may cause the unit to shut down. A secondary
source of heat should always be provided to the building;
do not depend on used oil as your only source of heat.
This will prevent building damage should the heater
become inoperable during subfreezing weather.
WARNING: Approved fuels are No. 2 fuel oil and used
automotive transmission fluid and crankcase oils up to
50 weight. Do not attempt to burn any grade of gasoline,
paint thinner, or non-approved fluids. Adequate
ventilation must be provided in any enclosure where
storage tanks, pumps, or accessories are installed.
This heater is not designed for use in hazardous atmospheres containing
flammable vapors or combustible dust, or atmospheres containing chlori-
nated or halogenated hydrocarbons.
WARNING: Failure to provide proper venting could
result in death, serious injury, and/or property damage.
Units must be installed with a flue connection, draft
regulator and proper vent to the outside of the building.
Safe operation of any gravity vented heating equipment
requires a properly operating vent system, correct
provision for combustion air, and regular maintenance
and inspection.
Safety
Warnings
Secondary
Heat Source
Fuels
Hazardous
Atmosphere
!
Venting

Form I-RA/D 140/235 (Version A), Page 6
Safety Warnings
Continued
Unpacking
and
Inspection
Check the heater for any damage that may have occurred in shipment!
If damage is found, file a claim with the transport company. Your unit was
inspected and tested at the factory prior to crating and was in perfect condi-
tion at that time. Open the boxes and verify receipt of all parts.
To protect the unit during shipping, the blower model (RAD) has special
supports that must be removed before installation.
• Blower support legs - Remove the four blower support legs and
screws.
• Check Belt Tension - Belt should be able to be depressed 1/2”- 3/4”
(13-19mm) - See illustration. If the belt
does not have proper tension, adjust by
means of the adjusting screw on the
motor base. After proper tension is
achieved, tighten the lock nut on the
adjusting screw.
Replace the belt guard.
WARNING: Care should be exercised to ensure that an
adequate supply of combustion air is available and free
toenterthe air openingsonallunits.Roomopeningsmust
equal one square inch per each 1,000 BTU heat input.
3/4 (19mm)
Fan Models (RA) use plastic cable ties to support the fan motors during
shipment. Cut and remove prior to installation.
Air for
Combustion
Non-Compliance Failure to install or maintain this heater properly will void the warranty.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 7
Parts Carton
Additional Parts
Shipped with each heater is a remote fuel pump and a carton of parts. The
carton contains parts required for installation. Before beginning actual in-
stallation, verify that the remote fuel pump and the parts listed below are at
the installation site.
Part No. Description
207396 

Thermostat
96388 

Oil Filter
135986 

Vacuum Gauge
110320 

Foot Valve
130952 

Oil Pump Inlet Manifold
37866 

Draft Regulator
121030 

Recycling Window Decal
121603 

Warning label (for inlet to fuel storage
system/tank)
136864 

Foot Valve Strainer
Pump




























Form I-RA/D 140/235 (Version A), Page 8
Heater
Placement
Minimum
Clearances from
Combustibles
Do not attempt to install this heater until you have read and under-
stand this manual!
Placement is critical to the efficient operation of this heater.
Measure all distances to comply with the specific code requirements and
minimum clearances listed below.
Refer to the section on Venting your heater for vent requirements and rec-
ommendations.
Locate the heater so that suitable means shall be provided to facilitate regu-
lar cleaning and maintenance of the heater (i.e. permanent platform, por-
table stairs, ladder, etc.).
WARNING: You must comply with all requirements on
distance from heater to combustibles.
Fan Models Blower Models
RA140/235 RAD140/235
inches mm inches mm
Top 2 51 6 152
Front 48 1219 48 1219
Side (Burner)* Canada 6 152 6 152
United States 18 457 18 457
Side (Opposite Canada 6 152 6 152
Burner)* United States 18 457 18 457
Rear* 24 610 6 152
Bottom 6 152 6 152
Flue Pipe Canada 9 229 9 229
United States 18 457 18 457
*Allow for service access.
In Canada, for additional information on installation clearances, refer to
CAN/CSA-B139-M91, “Installation Code for Oil Burning Equipment,”
Clause 7.0 - Installation Clearances.
WARNING:Clearancesapplytoallcombustibles.Donot
leavepaper, rags, oranymoveable combustibles nearthe
heaterorstoregasoline oranyotherflammablefluidnear
this appliance.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 9
High Altitude Installation
Standard Model RA/RAD 140 and 235 used-oil-fired heaters are designed
for use from sea level up to elevations of 3,000 ft. Without proper modifica-
tions severe overheating of the combustion chamber and heat exchanger
will occur if installed above 3,000 ft.Also, the onboard air compressor will
not deliver the correct amount of atomizing air to the fuel nozzle, resulting
in poor combustion. Factory-built high altitude heaters are identified with
the suffix “H” (i.e. RA-235-H).
WARNING: Standard model used oil units installed
above 3,000 ft (914M) elevation will overheat, damaging
the heat exchanger assembly. Use of standard model
heater above 5,000 ft (1514M) elevation may result in
incomplete combustion and formation of carbon
monoxide (CO). Elevations above 3,000 ft (914M)
elevation require installation of a heater that is either
factory-built or field converted for use at high elevation.
Failure to comply can result in severe personal injury or
deathand/orpropertydamageandwillvoidthewarranty.
Check the rating plate for the approved elevations.
Models RA/RAD140
Elevation Fuel Input Heat Input Heat Output
GPH LPH BTUH kw BTUH kw
0-3,000 ft 1.0 4.5 140,000 41.0 112,000 32.8
>3,000 - 7,000 ft 0.8 3.6 112,000 32.8 89,600 26.1
Models RA/RAD235
Elevation Fuel Input Heat Input Heat Output
GPH LPH BTUH kw BTUH kw
0-3,000 ft 1.7 7.7 238,000 69.7 190,400 55.8
>3,000 - 7,000 ft 1.45 6.6 203,000 59.4 162,400 47.6
>7,000 ft 1.24 5.6 173,600 50.8 138,880 40.7
If the heater is being installed above 3,000 ft, it must either be factory built
(Model 235-H) for that elevation or be changed in the field.
The high altitude conversion affects both the remote pump and the heater.
Install the high altitude kit prior to pump and heater installation.
High Altitude
Installation

Form I-RA/D 140/235 (Version A), Page 10
Fuel Tank,
Pump, and
Supply Lines
Fuel Tank
General Requirements
Model RA/RAD 140 and RA/RAD 235 heaters are approved to burn used crank-
case oil, transmission fluid, and No. 2 fuel oil. Maximum fuel input for a Model
140 is 1.0 GPH (4.5 L/H).Maximum fuel input for a Model 235 is 1.7 GPH (7.7
L/H).
The oil supply tank and fuel lines must be installed in accordance with the
National Board of Fire Underwriters requirements and all local ordinances. A
UL-listed tank such as Reznor® Model OT-250 or equivalent must be used.
In the U.S., regulations require that storage tanks located inside buildings shall
not exceed 275 gallons (1,041 L) individual capacity or 550 gallons (2,082 L)
aggregate capacity in one building.
In Canada, regulations require storage tanks located inside buildings shall not
exceed 550 gallons (2,082 L) individual capacity or 1,100 gallons (4,164 L)
aggregate in one building.
Check with the local Fire Marshall to assure compliance with local ordinances
and codes. Installation of the tank and supply lines is the responsibility of the
installer.
Fuel Tank
CAUTION: It is recommended that used oil be at a
temperature of 50°Forhigher when it enters the pump.At a
temperature below 50°F, oil becomes more viscous and
difficult to pump. The heatermay fire at a reduced rate and
become erratic resulting in nuisance shutdowns.
Install either a UL listed Reznor®Model OT-250 oil supply tank or a field-
supplied equivalent indoor storage tank.
• If installing a Model OT-250 tank, follow the installation requirements
and instructions on the tank.
• If installing a field-supplied tank, follow the manufacturer’s instruc-
tions.
• Height from the pump to the bottom of the heater should be no more
than 15 ft (4.5M). The used oil supply line should be a maximum of 60
ft (18M) in length.
Although maximum height from the pump to the heater is 15 ft (4.5 M), we
recommend that ease of service be considered when determining heater loca-
tion. A service height of eight feet (2.5 M) is recommended. See the illustra-
tions on pages 12 and 13 for examples of tank and line installation.
WARNINGS: Never pour gasoline or used oil containing
gasoline into the supply tank.Adequate ventilation must be
provided in any enclosures where storage tanks, pumps, or
accessories are installed.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 11
Remote Fuel Pump
The Model OT-250 tank has a platform designed for attaching the remote
fuel pump.
• Attach the fuel pump legs permanently either on the platform,
directly to a field-supplied tank, or in a location very near to the oil
tank.
• Mount the remote pump assembly in an upright, horizontal position
as shown in the illustration.
NOTE: Do not mount the pump assembly in a vertical or
inverted position.
Pump
Supply Lines
Installation
CAUTION: Do not use TEFLON®based pipe dope or
TEFLON®tapeto seal any pipe connections. (TEFLON®
is a registered trademark of DuPont Chemical.) Use of
TEFLON®based pipe dope or TEFLON®tape will void
the pump warranty.
Nut, 3/8 tube size,
5/8-18 straight thread
- at the fuel inlet con-
nection on the heater
service tray
Relief
alve
50 psi
Check
alve 1/2 Pipe Plug
(for priming line)
Return Line to Tank
(1/8 NPT black iron pipe)
acuum Gauge
(install in upright position)
Hex Bushing
1/2 x x 3/4
90° Elbow , 1/2
End must
be open.
Suction Line
(Standard 1/2 pipe)
Foot alve Foot alve
Strainer
Filter
Pump Inlet
Manifold
Pump
1/4 NPT
Connection
for Fuel Line
to Heater
Male Connection 3/8 Tube Size,
1/4 NPT, 5/8-18 Straight Thread;
Nut, 3/8 Tube Size, 5/8-18 Straight Thread
3/8 O.D. Copper
Tubing to Heater
Supply Lines
Read this section carefully before installing any supply lines. Since a suction line leak is nearly impossible to
find, take your time to assure all connections are leak-free during installation. Supply lines and fittings are
furnished by the installer. See the following illustration for minimum fittings required. Length of pipe and
tubing depends on the installation.
Run the suction line, using 1/2” standard black iron pipe, between the inlet
side of the filter and the foot valve. (Refer to the illustration.) A fuel line
filter with a cleanable strainer, a foot valve, a foot valve strainer, and a
vacuum gauge are provided with the heater. To prevent air from entering
the line, do not use union connections. Install the suction line components
Suction Line (portion
of supply line from
foot valve to pump)

Form I-RA/D 140/235 (Version A), Page 12
Barometric Draft
Regulator
Tee with Cleanout
Barometric Draft
Regulator
(alternate location)
Oil eed
Line 3/8
O.D.
Copper
Tubing
to Inlet
on
Burner
15 ft (4.6M)
Maximum
Lift (pump
to heater)
Room
Thermostat
OIl ill/Vent
Water/Sludge
Drain
Constant
Rate uel
Pump
Return
Line OIl Line ilter with
Vacuum Gauge
Suction Line (1/2 Std Pipe)
oot Valve and Strainer
At least 6 (152mm)
200/275
gallon
(757/1040
liter)
Oil Supply
Tank
Approx 12 (305mm)
Typical
Installation
Supply Lines
Installation
Continued
as illustrated. With the vacuum gauge mounted on the outlet side of the
filter, the gauge will indicate any suction line restriction including a dirty
filter. A pump inlet manifold is supplied for direct connection of the filter
to the inlet of the pump.
The 50 psi relief valve supplied with the pump and a return line of 1/8”
NPT black iron pipe must be installed as illustrated.
The discharge line between the valve on the outlet side of the fuel pump
and the heater should be 3/8” O.D. copper tubing with a minimum of 1/32”
wall thickness with 45° flare fittings. The discharge line must continually
rise.A lift height of up to 15 ft (4.5 M) is acceptable with a maximum total
length of 60 feet (18 M) of tubing.
Do not install manual valves in the supply line.
Connect the fuel line to the heater at the connection on the corner of the
service tray.
All piping should be protected from possible damage and be rigidly fas-
tened in place in a workmanlike manner. Do not use TEFLON®based pipe
dope or TEFLON®tape at the connections in an oil line. Use an oil-resis-
tant pipe dope. Do not use union connections in the suction line (line be-
tween the oil supply and the remote pump).
NOTE: Care must be exercised to ensure airtight connections.
Return Line
Discharge Line (por-
tion of supply line
from pump to heater)
Supply Line
Connections and
Support
Suction Line (cont’d)

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 13
Mounting the
Heater
Suspension
General Requirements
Before suspending the unit, check the supporting structure to ensure it has
sufficient load-carrying capacity to support the weight of the heater.
Model Net Weight
lbs kg
RA140 290 132
RA235 343 156
RAD140 352 160
RAD235 410 186
Use four 1/2”-13 diameter threaded rods. Lock each threaded rod using a
washer and nut as shown in the illustration below. Or, use optional swivel
connections(Option CK10) andfield-provided 1” threadedpipe. Lock swivel
connections as shown in the illustration. Remove the shipping crate bottom
from the unit.
Remove the angle clips and re-insert the screws into the heater cabinet.
WARNING: This heater must be supported level for
proper operation. Do not place or add additional weight
to the suspended heater.
1/2 - 13 Hex Nut
1/2 Lock Nut
1/2 lat Washer
OR, install optional
swivel connectors.
1/2 lat Washer
Swivel Assembly
1 Standard Pipe
1/2 - 13 Threaded Rod
Lock each rod
1/2 - 13 Lock Nut

Form I-RA/D 140/235 (Version A), Page 14
Venting the
Heater WARNING: Failure to provide proper venting could
result in death, serious injury, and/or property damage.
Unitsmustbe installed with aflueconnection and proper
vent to the outside of the building. Safe operation of any
gravity vented heating equipment requires a properly
operating vent system, correct provision for combustion
air, and regular maintenance and inspection.
The vent system must comply with all local codes and in the event that
local codes do not exist, the vent system must comply with a regional or
national code.
Guidelines
for the Vent
System
8 ft (2.4M)
Minimum
Single Wall Pipe
Barometric Draft
Regulator
(alternate location)
Ventilated Thimble
if construction
is combustible
Single Wall Pipe or
actory Built Vent
Vent Cap
actory Built Vent
3 ft (914mm)
minimum
Roof jack recommended by the
manufacturer of the factory built vent
Draft Inducer
(if required)
Barometric
Draft
Regulator
Tee with
Cleanout
2 ft (610mm)
minimum
The requirements for the vent system are dependent on (1) the location of
the heater within a building and (2) the type of building.
•If the heater and the vent system are within the same heated space,
single wall pipe may be used inside the building. The portion of the
vent system outside the building must be a factory-built vent that is
approved to Standard UL 641. See illustration below.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 15
Vent Cap
actory Built Vent
8 ft (2.4M)
Minimum
Single Wall Pipe
Barometric Draft
Regulator
(alternate location)
Tee with
Cleanout
Barometric
Draft
Regulator
Draft Inducer
(if required)
actory Built Vent
Roof jack recommended by the
manufacturer of the factory built vent
3 ft (914mm)
minimum
2 ft (6.0mm)
minimum
Ventilated Thimble
if construction
is combustible
Single Wall Pipe or
actory Built Vent
Detailed Require-
ments for the Vent
System (read all
before beginning
installation)
•Any portion of the vent
system that passes
through an unheated
space or a concealed
area such as an “attic”
must be a factory-built
vent that is approved to
Standard UL 641. See
illustration . . . . . . . . . . .
•The heater may be
vented into a masonry
chimney that complies
with the BOCA Na-
tional Mechanical Code
for low-heat appliances
or other building code
requirements for low-
heat appliances.
• Pipe/Joints/Clearances: Single-wall pipe must be a minimum of 24
gauge galvanized steel for 8” or 9” diameter pipe and 22 gauge for 10”
or 12” diameter pipe. Each joint must be secured with three screws or
rivets. If installing a factory-built vent, follow the manufacturer’s
instructions.
If the vent system passes through a combustible wall, material or roof,
for single wall pipe, maintain 18” (457mm) clearance or install a
ventilated thimble that is not less than 12” (305mm) larger than the
diameter of the vent pipe. If installing factory-built vent, follow the
manufacturer’s instructions.
• Horizontal Length and Slope: The horizontal portion of the vent
must comply with the maximum horizontal length shown in the table
below and have not more than two elbows. Horizontal portions must
be sloped upward 1/4” for each foot of pipe. If installation conditions
require horizontal lengths in excess of those permitted in the table, a
draft inducer must be used.
Vent Pipe Model Size and Maximum Length
Diameter Vertical Length of Horizontal Pipe
8” 140 with 8 feet (2.4M) or Equal to or less than
more of vertical pipe the vertical height
8” 235 with 8 feet (2.4M) 4 feet (1.2M) or less
of vertical pipe
8” 235 with 10 feet (3M) Equal to or less than
of vertical pipe the vertical height
• Vent Size: The vent system must be at least 8” in diameter.

Form I-RA/D 140/235 (Version A), Page 16
Draft
Regulator
Loosen knob
and slide in slot
to change draft.
Increase
Decrease
Detailed Require-
ments for the Vent
System (read all
before beginning
installation) (cont’d)
• Barometric Draft Regulator: A barometric draft regulator which is
the same diameter as the vent pipe must be used, and it should be
located close to the heater. See page 16. Do not install a manual
damper or any other device that will obstruct the free flow of the flue
gases.
• Support: The vent system must be adequately supported using non-
combustible strapping or supports to carry the weight of the vent and
wind load. Do not use the heater to provide support for the vent
system.
• Vertical Vent: If installing a factory-built vent, follow the
manufacturer’s instructions.
If a masonry chimney is used, a thimble that is permanently cemented
in place with high temperature cement should be used to permit easy
cleaning of the chimney. The end of the vent pipe must not extend past
the inside wall of the chimney.
• Draft Inducer: If a draft inducer is used, follow the manufacturer’s
instructions and wire the inducer according to the wiring diagram
provided.
• Terminal End: The vent must terminate at least 3 ft (914mm) above
the highest point of exit and at least 2 ft (610mm) higher than any
portion of a building or obstruction within 10 ft (3M) of the chimney.
Install a vent cap on the terminal end of the vent. A Reznor (Option
CC1) or Type L Breidert Air-x-hauster®vent cap is recommended. A
different style of vent cap could cause nuisance problems.
A barometric draft regulator is shipped with this heater and MUST be
installed in the flue near the heater flue opening.
Refer to the illustrations on pages 14 and 15 for recommended locations.
To install, follow the manufacturer’s instructions packaged with the draft
regulator.

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 17
Installing
Ducts
Inlet Air Duct
Discharge
Duct
Inlet Air Duct
Canadian installations require field installation of an inlet air duct (re-
turn air system) on a Model RAD heater. The blower-equipped heater has
an inlet air duct flange. Inlet duct dimensions (inside) should be:
RAD140 RAD235
Height 32-1/8” (816mm) 32-1/8” (816mm)
Width 21-3/4” (552mm) 31-1/8” (791mm)
Slip the ductwork over the flange and attach using 1/2” long sheet metal
screws.
Discharge Duct
A discharge duct may be attached to a Model RAD heater. To connect the
duct to the heater,
• Remove the louvers from the furnace.
• Field fabricate a duct transition as illustrated.
• Attach duct transition to the heater using 1/2” long sheet metal
screws
IMPORTANT: Never reduce the furnace opening size
abruptly. Always use a tapered transition like the one
illustrated.
3/4 (19mm)
18
(457mm
minimum)
3/4 (19mm)
3/4 (19mm)
16-1/4 (413mm)
A
B
RAD A Minimum B
140 30” (762mm) 15” (381mm)
235 40” (1016mm) 20” (508mm)
Model RAD 140 235
CFM (free air) 2000 3200
Air throw (9 ft 50 ft 65 ft
suspension) 15M 20M
CFM .25" ESP 1425 2140

Form I-RA/D 140/235 (Version A), Page 18
Heating
Thermostat
Pump Power
Installation Pump Power
To connect the electrical power from the heater to the pump,
• Use a 3 conductor, 14 gauge wire system - two 115 volt conductors
and a ground. Use BX if permitted, but make certain to follow
local codes for running conduit.
• Refer to the wiring diagram for connecting terminals.
Heater Power Installation
DANGER: Make sure that the main circuit is OFF before making any wiring
connections. All wiring must be done in accordance with appropriate Codes!
Main Power To install main power to the system (check the table below and the rating
plate on the furnace for current requirements),
• Use #12 gauge stranded copper wire for RA and #8 gauge for RAD to
run a dedicated 115 volt, single phase, line from the power source to a
junction box mounted on the wall behind the heater or as required by
appropriate codes.
• Run the length of appropriate conduit from the heater to the junction
box.
• Connect the black wire to the hot lead.
• Connect the white wire to the neutral lead.
• Connect the green wire to the ground lead.
• Install a fused manual reset, line voltage switch (field supplied) in this
main line
• Electrical Ratings
A 24-volt thermostat is furnished as standard equipment.
DO NOT attempt to wire relays or other accessories to the thermostat con-
nections as these are not load terminals.
DO NOT install on or suspend the thermostat from the heater
DO NOT install thermostat on a cold outside wall
To install the thermostat,
• Locate the thermostat five feet above the floor on an inside wall,
not in the path of warm or cold air currents nor in corners where air
may be pocketed
• Remove the thermostat cover
• Make sure the heat anticipator dial is set at 0.2 amps
• Connect the wires through the back of the thermostat to the R & W
terminals
• Set the ON/OFF switch on the heater electrical box to the “OFF”
position and connect the thermostat wires to the two “T” terminals
on the ignition controller.
Total Minimum Maximum
Current Circuit Fuse Size
Model Amperes Ampacity (Supply)
RA140 13 16 20
RAD140 24 30 40
RA235 14 18 20
RAD235 24 30 40

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 19
Priming and
Leak Check
For control locations,
refer to illustration on
page 38
Priming and Checking the System
The oil supply line to the heater must be full of oil and free of air for proper
heater operation.
NOTE: Priming the oil line could take up to 30 minutes depending on the
length of the line.
Follow the procedure below to fill the oil line.
1. Be sure the oil tank is filled to at least six inches above the top of
the foot valve.
Burner
Start-Up
System Check
Check Test - Prior to Start-Up
You should check your system completely before operating it.
Check clearances from combustibles. Be certain that the clearances
are in compliance with the appropriate Codes.
Check hangers and supports. Be certain that all hangers, supports,
and arms are adequately anchored and that all unions or threaded
fittings are snug and do not rotate. Heater must be level.
Check to make sure all shipping supports have been removed.
Check the electrical supply. Be sure that all wire gauges are as
recommended and that the supply voltage is as stated on the
heater. Determine that fusing or circuit breakers are adequate for
the load.
Check vents. Be sure that vent pipe and chimney meet the require-
ments and appropriate codes. A UL or CSA/UL listed draft regula-
tor is required. A Reznor®(Option CC1) or Type L Breidert Air-X-
hauster®vent cap is recommended. (Type L Air-X-hauster®is a
trademark of The G. C. Breidert Company.)
Check the oil supply. Fill the supply tank to at least six inches from
the top of the foot valve. NOTE: Always screen used oil with a
70-80 mesh strainer when filling the supply tank.
Canadian RAD (blower model) installation only -- Be sure an inlet
air duct is installed in compliance with Codes.
Heater Start-Up

Form I-RA/D 140/235 (Version A), Page 20
2. Set manual disconnect switch to the ON position.
3. Fillthe suction line (linebetweenthesupply tank andthepump)with
cleanused oil. (Do not usenew motor oil.)
4. Locatethe rubber tubingconnecting thepressure switch inthe main
controlbox and thecompressor.
• Disconnect the tubing at the fitting on the compressor. This will prevent
oil from flowing to the burner.
5. Removethe cad-cell wirefromthe F1-F2 terminalsofthe ignition
controller.
• Either attach a piece of tubing to the bleeder valve on the strainer tee
(see page 26) on the burner assembly or place a container underneath
to collect oil.
• Loosen the bleeder valve.
6. Set the thermostat to a temperature above room temperature.
NOTE: On initial start-up it will take approximately ten minutes to heat
the oil. Once the oil is warm enough, the green light will come on and the
unit will be ready to start. This delay only occurs on initial start-up or when
the disconnect switch has been turned off for an extended time.
• After the motor starts, place a jumper across the cad-cell terminals
(F1-F2) on the ignition controller.
• Observe the remote fuel pump motor to make certain it is running.
• Open the bleeder valve on the remote pump and wait until a full flow
of oil is obtained without any air.
IMPORTANT NOTE: If air bubbles are present and do not stop, there is a
suction line leak.
• Check the piping between the tank and the pump and correct the leak.
• Once a full flow of oil is present without any sign of air, close the
bleeder valve on the remote pump.
• Observe the bleeder valve at the strainer tee and wait until a full flow
of oil is obtained without any air.
• Tighten the bleeder valve on the strainer tee and remove the oil con-
tainer.
NOTE: DO NOT replace the rubber tubing previously disconnected from
the compressor and DO NOT re-connect the cad-cell wires.
7. Allow the system to operate for several minutes.
• Check the system for leaks at all connections.
• Observe the return line to the tank - oil should be flowing.
• Correct all leaks and re-test the system.
8. When the system checks out as having no leaks, turn disconnect
OFF, replace the rubber tubing and cad-cell wires removed earlier.
9. Remove the jumper from the F1-F2 terminals of the ignition
controller.
Priming and
Leak Check
Continued
For control
locations, refer to
illustration on page
38
You are now ready to start your system.