Thermo Pride OME-72T36 Manual

THERMO PRODUCTS, LLC.
POST OFFICE BOX 237
DENTON, NC 27239
PHONE: [phone]
MO-487
ECN 5577-M 190924
M DE IN US
OIL-FIRED FURNACE
DOWN FLOW & DIRECT VENT (SEALED COMBUSTION)
MODEL: OME-72D36 / OME-72T36
INSTALLATION AND SERVICE MANUAL
For installation in:
1. Manufactured Homes
2. Modular Homes/Buildings
3. Site Construction—Residential
:
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
W AT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the fire department.
: If the information in these instructions is not followed exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
: Improper installation, adjustment, alteration, service, or maintenance can cause injury or
property damage. Refer to this manual. For assistance or additional information consult a qualified installer,
service agency, or fuel supplier.
: Do not use this appliance if any part has been underwater. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the electrical or control system that has been
underwater.
PLEASE READ T ESE INSTRUCTIONS PRIOR TO INSTALLATION, INITIAL FIRING, AND BEFORE
PERFORMING ANY SERVICE OR MAINTENANCE. T ESE INSTRUCTIONS MUST BE LEFT WIT T E USER
AND S OULD BE RETAINED FOR FUTURE REFERENCE BY QUALIFIED SERVICE PERSONNEL.

All installations and services must be performed by qualified service personnel.
1
I. SAFETY SECTION
This page and the following two pages contain various warnings and cautions found
throughout this furnace Service and Installation Manual. Please read and comply with the
statements on the cover and the statements below.
: ll local codes and ordinances must be followed with regard to the oil tank and
oil lines. ll lines must have shut off valves, use a proper pipe joint compound (specified for
use with oil) on all pipe threads, no kinks, no sharp bends, and be properly tested for leaks.
Flare fittings are recommended for tubing.
: This furnace is not to be used as a construction heater.
: DO NOT RUN THE OIL PUMP DRY FOR MORE TH N FIVE MINUTES.
: When testing electrical equipment, always follow standard electrical procedures
and precautions.
: The heat exchanger must be cleaned by a qualified service person.
: The area around the furnace should be kept free and clear of combustible
materials, especially papers and rags.
: NEVER burn garbage or refuse in your furnace. NEVER try to ignite oil or gas
by tossing burning papers or other material into your furnace.
: Thermo Pride oil furnaces are designed to burn commercial standards of No. 1
and No. 2 fuel oil. NEVER USE G SOLINE OR MIXTURE OF OIL ND G SOLINE.
: Do not attempt to start the burner when: 1. Excess oil has accumulated 2. The
furnace is full of vapors or 3. The combustion chamber is very hot. If one or more of these
conditions exist, contact a qualified service person.
: If the temperature rise exceeds 100°F, the heat exchanger may fail voiding the
heat exchanger warranty resulting in property damage, personal injury or loss of life.
: Burner adjustments must be confirmed by instrumentation. Failure to use
accurate or calibrated instrumentation to setup the burner may result in reduced efficiency,
sooting and/or the production of hazardous carbon monoxide gas.
: ny attempt to relocate safety controls or replace safety controls with a control
that is not approved or incompatible, may result in personal injury, substantial property
damage or death.

All installations and services must be performed by qualified service personnel.
2
: If you do not follow these instructions exactly, a fire or explosion may result
causing personal injury, loss of life or property damage.
: NEVER use gasoline or a mixture of oil and gasoline to start the burner or
furnace.
: H Z RD OF SPHYXI TION: Negative pressure inside the closet with closet
door closed and the furnace blower operating shall be no more negative than minus 0.05 inch
water column.
: Do not obstruct any return air openings, including the return grille on the
furnace. To do so may cause the furnace to activate the high limit and shut down or it may
cause asphyxiation.
: ll local codes and ordinances take precedence with regard to tank and oil lines.
ll lines must have shutoff valves, a good pipe joint compound approved for use with oil on
all pipe threads, no kinks, no sharp bends and be properly tested for leaks. Flare fittings are
recommended for tubing.
: Do not use motor oil or any fuel heavier than No. 2 fuel oil..

All installations and services must be performed by qualified service personnel.
3
: If you suspect there is a problem with the furnace, the venting system or any other
related problem, immediately contact a qualified service agency. If a service agency is not
available contact your fuel supplier.
: Personal injury, or property damage, could result from major repair or service of
this furnace by anyone other than a qualified contractor. Only the routine maintenance
described in the user section of this manual should be performed by the user.
: The area around the furnace should be kept free and clear of combustible
materials, especially papers and rags.
: Never burn garbage or refuse in your furnace. Never try to ignite oil or gas by
tossing burning papers or other material into your furnace.
: Do not attempt to start the burner when:
1. Excess oil or gas has accumulated.
2. The furnace is full of vapors.
4. The combustion chamber is very hot.
If one or more of these conditions exist, contact a qualified service person.
: Do not block or obstruct air openings on the furnace or air openings
communicating with the area in which the furnace is installed.
: Do not allow the outside air intake to be blocked or obstructed by vegetation, ice,
snow or any other materials.
: Do not use this furnace if any part has been underwater. Immediately call a
qualified service agency to inspect the furnace and to replace any part of the electrical or
control system which has been underwater.
: Should overheating occur or the fuel supply fail to shut off, shut off the manual
fuel supply valve to the furnace before shutting off the electrical supply.

All installations and services must be performed by qualified service personnel.
4
c
c
This page and the following page contain reproductions of the various warning and
instruction labels placed on the Thermo Pride Oil Furnace. Please read and comply with
the contents of these labels.

All installations and services must be performed by qualified service personnel.
4a

All installations and services must be performed by qualified service personnel.
5
TABLE OF CONTENTS
SECTION BEGINNING PAGE
I. S FETY SECTION 1
II. GENER L INSTRUCTIONS ND CLE R NCES 6
III. FURN CE SPECIFIC TIONS 8
IV. INST LL TION 10
. ROOF J CK 10
B. ST ND RD CHIMNEY 10
C. FURN CE LOC TION 10
D. B SE INST LL TION 11
1. Combustible Floor Base Model: 70-B SE 11
2. Cottage Base Model: 01COT-B SE 13
E. LCOVE INST LL TION 15
F. CLOSET INST LL TION 15
G. COMBUSTION IR 16
H. FUEL PIPING 19
1. Oil Tank and Piping 19
J. ELECTRIC L WIRING 21
1. Electrical Branch Supply Circuit 22
2. Connection of Power Supply Wires 22
3. Connection of Thermostat Wires 22
4. Blower Controller Information for PSC/CTM Motor 23
5. Wiring Diagram 30
K. BURNER INST LL TION 32
L. BURNER OPER TION ND DJUSTMENT 32
M. FLUE G S COMBUSTION N LYSIS 35
V. DE LER M INTEN NCE 36
. TROUBLESHOOTING 37
B. C D CELL CHECKOUT PROCEDURE 42
C. HE T EXCH NGER CLE NING INSTRUCTIONS 42
D. CLE NING OR REPL CING FLUE PIPES 44
E. EXTENDED SHUTDOWN ND REST RT 44
VI. USERS INFORM TION SECTION 45
. W RNINGS & C UTIONS 45
B. COMPONENT LOC TIONS 46
C. INSPECTION RE S 46
D. FILTER LOC TION ND CLE NING 47
E. CONT CT INFORM TION 47
PPENDIX - REPL CEMENT P RTS LIST 48

All installations and services must be performed by qualified service personnel.
6
II. GENERAL INSTRUCTIONS AND CLEARANCES
NOTE: READ T IS SECTION BEFORE STARTING INSTALLATION
1. The selection of a furnace heating capacity for a proposed installation should be based on a
heat loss calculation made according to the manuals provided by the ir Conditioning Contractors
of merica ( CC ) or the merican Society of Heating, Refrigeration and ir Conditioning
Engineers, Inc. ( SHR E).
2. The installer shall be familiar with and comply with all codes and regulations applicable to the
installation of this heating appliance. In addition to the governing standards items a) through e)
this appliance shall also comply with “CS B139 for recommended installation practices” where
applicable.
a. Federal Manufactured Home Constructions & Safety Standard (HUD Total 24, Part 280).
b. merican National Standard ( NSI-119.2/NFP -501C), for all recreational vehicle
installations.
c. merican National Standard ( NSI-Z223.1/NFP -54), for all gas-fired furnaces.
d. merican National Standard ( NSI-Z95.1/NFP -31), for all oil-fired furnaces.
e. merican National Standard Electric Code ( NSI-C1/NFP -70), for all electrical field
wiring.
The oil-fired furnace has been investigated under the UL 307 test standard and CS B140 and
is listed by ETL and described as, “For installation as central furnace special type”.
: The area around the furnace must be kept free and clear of combustible
materials, especially papers and rags.
: This furnace is not to be used as a construction heater.
1. Definitions of "combustible" and "non-combustible" materials as presented in the 1996 version
of the National Fuel Gas Code, NSI Z223.1-1996/NFP 70-1996, are as follows:
a. Combustible material:
“...materials made of or surfaced with wood, compressed
paper, plant fibers, or other materials that are capable of
being ignited and burned. Such materials shall be
considered combustible even though flameproofed, fire-
retardant treated, or plastered.”

All installations and services must be performed by qualified service personnel.
7
b. Non-combustible material:
“...material that is not capable of being ignited and burned;
such as material consisting entirely of, or a combination of,
steel, iron, brick, concrete, slate, asbestos, glass, and plaster.”
This heating appliance must be installed with clearances to combustible material surfaces of not
less than the minimum distances given below. lso, allow ample clearances for servicing the
furnace for easy access to the air filter, blower assembly, burner assembly, controls, and vent
connections.
MODELS OME
CLOSET LCOVE
FRONT
B CK
SIDES
ROOF J CK
VENT CONNECTOR
TOP
PLENUM SIDES
TOP ND SIDES OF DUCT
BOTTOM OF DUCT
6”
0”
0”
0”
6”
1”
1”
1”
1”
18”
0”
0”
0”
6”
1”
1”
1”
1”

All installations and services must be performed by qualified service personnel.
8
III. FURNACE SPECIFICATIONS
MODEL OME-72
Low Fire High Fire1
HE T INPUT R TE (BTUH) 70,000 85,000
HE TING C P CITY (BTUH) 60,000 72,000
BURNER NOZZLE (GPH X
NGLE, HOLLOW CONE) 0.50X80° 0.60X80°
OIL PUMP PRESSURE (PSIG) 120
VENT PIPE SIZE (INCHES) 4
DESIGN TEMPER TURE RISE (°F) 66
MINIMUM RETURN IR TEMP. (°F) 50
SE SON L EFFICIENCY
( FUE2 *, %) 86
1 Burner shipped with 0.60x80° nozzle
2 * FUE - INCLUDES STE DY ST TE THERM L EFFICIENCY ND OFF CYCLE
LOSSES.
ELECTRIC L R TINGS ND SETTINGS:
ELECTRIC L SUPPLY: 120 V C / 60HZ / 1 PH SE
M XIMUM TIME DEL Y TYPE FUSE OR H CR BRE KER R TING: 15 MPS
TOT L R TED CURRENT ( MPS): 10.3
NOMIN L HE T NTICIP TOR SETTING -- 0.2 m
DIMENSIONS & WEIGHTS:
C BINET: WIDTH - 18 IN., DEPTH – 24-3/4 IN., HEIGHT - 57 IN.
NO.70 MOBILE HOME B SE: WIDTH - 18 5/16 IN., DEPTH - 24¼ IN., HEIGHT - 4 IN.
W RM IR DUCT: WIDTH – 12 IN., DEPTH – 12 IN., HEIGHT - 14 ¼ IN.
COTT GE B SE: WIDTH – 18 3/16 IN., DEPTH - 24¼ IN., HEIGHT – 14¾ IN.
FILTER QU NTITY & SIZE: (1) @ 18 IN. x 24 IN. x 1 IN. E .
PPROXIM TE SHIPPING WEIGHT: 240 LBS.
BURNER DATA
OME-72
M NUF CTURER: R.W. BECKETT CORP.
MODEL: FG
IR TUBE LENGTH (IN.): 3
HE D DESIGN: F-3
REFR CTORY TYPE: ISOFORM (SOFT FIBER)
OIL PUMP
PRESSURE (P.S.I.G.) 120

All installations and services must be performed by qualified service personnel.
9
FOR BURNER COMBUSTION INFORM TION, REFER TO SECTION (M) – FLUE G S
COMBUSTION N LYSIS.
BLOWER DATA
LL SPECIFIC TIONS RE SUBJECT TO CH NGE WITHOUT NOTICE.
FURNACE MODEL OME-72D36 OME-72T36
BLOWER MODEL 12-9T 12-9T
MOTOR H.P. ½ HP ½ HP
NO. OF SPEEDS 4 5
HIGH SPEED AIRFLOW (SCFM) @ .5 IN.
W.G. EXTERNAL STATIC PRESSURE 1195 1189
DIAMETER X WIDTH 12 x 9 12 x 9

All installations and services must be performed by qualified service personnel.
10
IV. INSTALLATION
A. ROOF JACK
The roof jack assembly and accessories must be listed by a nationally recognized testing agency
for the appropriate fuel.
The roof jack assembly must be installed according to the vent manufacturer’s instructions prior
to the furnace installation. (Refer to Figure 2 for flue location on furnace.) dapters for pitched
roofs as well as extended barrel length roof jacks are available from Thermo Products.
ll vent seams and connections must be sealed with high temperature silicone caulk and/or high
temperature aluminum tape.
B. STANDARD C IMNEY
When installed as a central furnace special type for single story dwelling, venting into a metal vent
system approved by a nationally recognized testing agency for the appropriate fuel type is
permitted. Lined masonry chimneys are acceptable when sized appropriately. The minimum
chimney size should equivalent to the inside free area of the 4-inch diameter vent collar exiting the
furnace, or 12.5 square inches.
Maximum chimney sizes and acceptable installation practices are referenced in the following
publications. In lieu of local codes, when installing the OME-72 with fuel oil, refer to the latest
edition of the installation standard NFP 31, Installation of Oil Burning Equipment.
Notice: Blocked Vent Switch Installation for cottage type homes or non-mobile home type
dwellings. The blocked vent switch kit must be installed to comply with C N STD B140.4 where
applicable. For installation instructions see OPS2686 kit.
C. FURNACE LOCATION
1. For best performance, locate the furnace so that it is centralized with respect to the duct
system.
2. This furnace is only intended for installation with free air return through the furnace door
louvers. DO NOT connect a ducted return air system directly to the furnace. Improper
installation may create a fire hazard and damage internal equipment, as well as void all
manufacturer’s warranties.
3. This furnace may be installed on combustible flooring when utilizing either the No. 70
counterflow floor base, for below the floor duct systems, or with the cottage base, for floor
level air distribution. See Figures 1 for depictions of the No. 70 and the cottage bases.

All installations and services must be performed by qualified service personnel.
11
4. This furnace is ETL listed for closet, alcove or freestanding applications. ll applications must
comply with the requirements of this manual.
Combustible Floor Base
Model: 70-BASE
Figure 1A.
Cottage Base
Model: 01COT-BASE
Figure 1B.
D. BASE INSTALLATION
1. Combustible Floor Base Model: 70-B SE

All installations and services must be performed by qualified service personnel.
12
Use the base bottom panel as a template to mark floor opening locations (see Figure 2). Cut a
square opening in the floor for the supply air connector duct. Cut the opening 1-inch larger
than the square template opening. (duct requires 1-inch clearance to combustible floor). Cut a
combustion air duct opening in the floor 1/8-inch larger than the template opening.
Figure 2.
fter cutting openings in the floor, place the bottom panel in position. Mark the square
opening location on the distribution duct at the connection point of the connector duct.
Remove the bottom panel. Cut an opening in the distribution duct slightly larger than the
connector duct. (refer to Figure 2 for location of this cut.) Cut the connector duct to length.
Install the connector duct. Bend over each tab. Insure an airtight seal by using high
temperature sealant or tape on the joint. Reinstall the bottom panel over the connector duct.
Insert and secure the combustion air duct. Put the base top assembly in place (see Figure-3).
IMPORTANT: combustion air duct must be used. If the underside of the mobile home is
skirted or enclosed (e.g. enclosed in a crawlspace), the combustion air intake should exit
through the skirting, or enclosure, if at all possible. ll joints and seams of supply ducts and
combustion air ducts must be closed with a sealing method suitable to the application
conditions and temperatures ( e.g. high temperature silicone caulk and/or aluminum tape).
Notice: If desired, combustion air can be brought in thru the roof of the dwelling and into to the
furnace cabinet with Thermo Products Kit OPS7512. See your local Thermo Pride
representative for details or call customer service.

All installations and services must be performed by qualified service personnel.
13
If the combustion air passageway cannot terminate outside of the skirting or enclosure, a
permanent opening with a minimum of 50 square inches of unobstructed infiltration (free
area) for ventilation air must be provided for adequate combustion. This permanent opening
must be located no less than 12 inches from the bottom of the enclosure or skirting.
Figure 3.
Slit the corners of connector duct down to the top of the base assembly. If metal projects more
than 1-inch above the top of the base assembly, trim the flanges down to 1-inch. While the top
of distribution duct is being pulled up with one hand, bend down each side of the connector
duct tightly to the base assembly with the other hand. This assures a tight connection between
the base assembly and the connector duct and that the distribution duct will be full size. Use
high temperature tape and/or high temperature silicone caulking on all joints and seams to
minimize air leakage. Secure the base assembly to the floor with two screws in the front flange.
2. Cottage Base Model: 01COT-B SE
The 01COT-B SE cottage base (Figure 1B) is required for a freestanding cottage base
installation. The cottage base is designed to permit the installation of an 8-inch x 12-inch register
in each of the two side panels and the rear panel. This allows combustion air to be drawn from
outside, or inside, the structure whichever is appropriate, or permissible. See section G.
COMBUSTION AIR for further details regarding combustion air requirements.

All installations and services must be performed by qualified service personnel.
14
IMPORTANT: dequate combustion air must be provided under all circumstances. If the
underside of the home is skirted or enclosed (e.g. by an enclosed crawlspace), the combustion
air intake should exit through the side of cottage base and terminate outside of the structure.
ll joints and seams of supply ducts and combustion air ducts must be closed with a sealing
method suitable to the application conditions and temperatures (e.g. using high temperature
silicone caulk and/or aluminum tape).
If the combustion air passageway cannot terminate outside of the structure, a permanent
opening with a minimum of 50 square inches of unobstructed infiltration (free area) for
ventilation and combustion air must be provided to the interior of the structure. dditional
make-up air may need to be supplied to the interior of the structure to compensate for exhaust
fans, appliances, or vents which consume air from the interior of the structure.
Refer to the assembly installation instructions included with 01COT-B SE cottage base for
additional information.

All installations and services must be performed by qualified service personnel.
15
E. ALCOVE INSTALLATION
In this application, a minimum of 18 inches of
clearance must be provided to the front of
the unit. Refer to Figure 4.
lcove installations must use the No. 70
mobile home base.
Note – access to diagnostic view port.
Refer to section G. COMBUSTION AIR
for additional combustion air requirements.
Figure 4.
F. CLOSET INSTALLATION
: H Z RD OF
SPHYXI TION: suction effect
will occur when the furnace is
operating inside the closet with the
closet door closed. For proper
operation, the furnace blower shall
create no more than a 0.05-inch
water column pressure differential
between the closet and the
adjoining space.
Figure 5.
1. The return air opening into the
closet is to have a minimum free
area of 250 square inches, (refer
to Figure 5).

All installations and services must be performed by qualified service personnel.
16
2. The return air opening may be located in the top, the center or (ideally) the bottom of the
closet door, or side wall.
: Do not obstruct any return air openings, including the return grille on the
furnace. To do so may cause the furnace to activate the high temperature limit and shutdown,
or it may cause asphyxiation.
3. The cross-sectional area of the return air duct leading into the closet (when located in the
floor or ceiling) shall not be less than 250 square inches.
4. The total free area of openings in the floor or ceiling registers serving the return air duct
system must be at least 350 square inches. t least one register must be located where it is not
likely to be covered by carpeting, boxes, furniture, or any other objects.
5. Materials located in the return duct system must have a flame spread classification of 200 or
less.
6. Pans made of a non-combustible material having 1 inch upturned flanges are to be located
beneath openings in a floor, return air, duct system.
7. Wiring materials located in the return air duct system must conform to rticle 300-22 of the
latest edition of the National Electrical Code, NFP 70.
8. Gas piping shall not be located in, or extend through, the return air duct system.
9. Refer to section G. COMBUSTION IR for additional combustion air requirements.
G. COMBUSTION AIR
The furnace requires the proper amount of combustion air be available to combust the fuel cleanly
and efficiently. n inadequate combustion air supply can result in unsafe and erratic operation of
the burner, sooting of the combustion chamber and the heat exchanger, and possibly, offensive
fuel odors. The combustion air intake must provide an adequate source of combustion air to the
appliance. Refer to part 5.3 of the National Fuel Gas Code, NSI Z223.1 / NFP 54-1999, or
latest edition for application specific combustion air requirements.

All installations and services must be performed by qualified service personnel.
17
The preferred location of the outside combustion air intake termination (e.g. an optional stainless
steel intake hood, part no.370183) is through the side of the structure, skirting or enclosure. n
alternate termination location is under the structure in the skirted or crawlspace area providing a
minimum of 50 square inches of free area exists around the perimeter for outside combustion air
to be drawn through. NOTE: Combustion air cannot be drawn from the occupied space of the
home.
The furnace is shipped with a 2” radiator hose, 2” pvc street ell, 3” dia flex hose and clamps. If
combustion air needs to be pulled from the floor, attach the black plastic adapter to the base of
the combustible floor base. Make sure the knock-out has been removed. Use hi-temperature
silicone and screws to secure the adapter. If needed, the combustion air can be pulled from the
rear of the floor base. For this method remove the knock out in the vertical wall and attach the
adapter to this opening as indicated.
The Beckett burner is equipped with a plastic air boot. The 2” radiator hose and 2” pvc street ell
are to be attached to the boot inlet. Use the two smaller clamps to affix the hose to the boot and
the boot to the male end of elbow. fter cutting the flexible hose to the appropriate length, attach
it to the street ell and the black adapter using the remaining two clamps.
The material recommended for the combustion air duct under the structure is smooth, round,
galvanized steel duct or schedule 20 PVC pipe. The maximum duct length allowed is equivalent to
40-feet of straight duct. Reduce this length by 6-feet for the intake hood and each 90-degree
elbow used, and by 3-feet for each 45-degree elbow used the combustion air duct. Flexible, spiral,
or corrugated duct is not recommended, due to the relatively high pressure drop associated with
air movement through this type of passageway.
If the combustion air is preferred thru the roof then kit OPS7512 is required. The radiator hose
is then placed over the Beckett boot opening and the hose is clamped over the radiator hose and
boot adapter. ttach the other end to the 2-1/2” combustion air pipe that now protrudes out of
the lower right separator panel with remaining clamp. n alternate installation method would be
to secure the 2” pvc street ell to the metal combustion air pipe. Insert the male end with silicone
sealant and then secure with a tek screw. Cut the 3” flex hose to length and attach it with clamp
to female end of street ell. ttach the other end to burner air-boot as described earlier.