Carrier Furnace 58CMA User Manual

58CMA  
Series 130  
Multipoise Oil Furnace  
Installation, Start-up,  
and Operating Instructions  
NOTE: Read the entire instruction manual before starting the  
installation.  
This symbol indicates a change since last issue.  
TABLE OF CONTENTS  
SAFETY CONSIDERATIONS.....................................................1  
INTRODUCTION..........................................................................2  
LOCATION....................................................................................3  
General ......................................................................................3  
Location Relative to Cooling Equipment ................................3  
INSTALLATION...........................................................................3  
Air for Combustion and Ventilation ........................................3  
General ......................................................................................4  
Unconfined Space.....................................................................4  
Confined Space.........................................................................4  
All Air from Inside the Structure .......................................4  
All Air from Outside of Structure ......................................5  
Duct Work Recommendations ............................................5  
Venting.................................................................................5  
Oil Burner............................................................................6  
Oil Connections...................................................................6  
Barometric Draft Control ....................................................6  
Electrical Connections.........................................................6  
Horizontal or Downflow Installation..................................7  
Filters ...................................................................................7  
A97247  
Fig. 1—58CMA Multipoise Oil Furnace  
START-UP, ADJUSTMENT, AND SAFETY CHECKOUT......7  
Operational Checkout ...............................................................7  
Combustion Check....................................................................7  
Fan Adjustment Check ...........................................................10  
Limit Control Check...............................................................11  
For Year-Round Air Conditioning.........................................11  
Heating ....................................................................................11  
Cooling....................................................................................11  
Constant Blower Switch.........................................................11  
For use with grade 1 or 2 Fuel Oil. Do not use Gasoline,  
Crankcase Oil, or any Oil containing Gasoline! Failure to  
follow this warning could lead to sooting, fire, explosion,  
and/or severe bodily harm.  
Never burn garbage or paper in the heating system and never  
leave rags, paper, or any flammable items around the unit.  
Failure to follow this caution will result in minor unit or  
property damage.  
MAINTENANCE.........................................................................11  
General ....................................................................................11  
Oil Burner ...............................................................................11  
Heat Exchanger and Flue Pipe...............................................11  
Blower Removal .....................................................................12  
These instructions are intended to be used by qualified  
personnel who have been trained in installing this type of  
furnace. Installation of this furnace by an unqualified person  
may lead to equipment damage and/or a hazardous condition  
which may lead to bodily harm.  
SAFETY CONSIDERATIONS  
FOR YOUR SAFETY  
DO NOT STORE OR USE GASOLINE OR OTHER  
FLAMMABLE VAPORS AND LIQUIDS IN THE  
VICINITY OF THIS OR ANY OTHER APPLIANCE.  
DO NOT ATTEMPT TO START THE BURNER  
WHEN EXCESS OIL HAS ACCUMULATED, WHEN  
THE FURNACE IS FULL OF VAPOR, OR WHEN  
THE COMBUSTION CHAMBER IS VERY HOT.  
All local and national code requirements governing installation of  
oil burning equipment, wiring, and flue connections must be  
followed. Some of the codes (issued by the Canadian Standards  
Association, the National Fire Protection Agency, and/or the  
American National Standards Institute) that may be applicable are:  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book  
Tab 6a 8a  
1
4
PC 101  
Catalog No. 535–80076  
Printed in U.S.A.  
Form 58CMA-4SI  
Pg 1  
9-03  
Replaces: 58CMA-3SI  
 
Table 1Minimum Clearances To Combustible Materials (In.)  
UNIT APPLICATION  
Furnace  
UPFLOW  
DOWNFLOW  
HORIZONTAL  
0
2
2
Sides  
Back  
Top  
Supply Plenum and Warm-Air Duct Within 6 ft  
of Furnace  
1
2
1
Service Clearance  
0
2
1
2
0
2
Furnace Casing or Plenum  
Horizontal Warm-Air Duct Within 6 ft of  
Furnace  
2
2
3
Bottom  
0
4
9
8
0*  
4
0*  
4
Horizontally or Below Pipe  
Vertically Above Pipe  
Flue  
Pipe  
9
9
Front  
8
24  
* Use approved subbase for combustible floor.  
NOTE: Adequate service clearances should be provided over and above these dimensions as required.  
The air handling capacity of this furnace is designed for cooling  
airflow. Refer to Table 12 for expected airflows at various external  
duct static pressures.  
The required minimum clearances for furnace are specified in  
Table 1.  
The furnace should be located as close as possible to chimney or  
vent in order to keep vent connections short and direct. The  
furnace should also be located as near as possible to center of air  
distribution system.  
LOCATION  
Step 1General  
Step 2Location Relative to Cooling Equipment  
This furnace is not water tight and is not designed for outdoor  
installation. This furnace shall be installed in such a manner  
as to protect electrical components from water. Outdoor  
installation would lead to a hazardous electrical condition and  
to premature furnace failure.  
When installing furnace with cooling equipment for year-round  
operation, the following recommendations must be followed for  
series or parallel airflow:  
1. In series airflow applications, coil is mounted after furnace in  
an enclosure in supply-air stream. The furnace blower is used  
for both heating and cooling airflow.  
Do not use this furnace as a construction heater. Use of this  
furnace as a construction heater exposes furnace to abnormal  
conditions, contaminated combustion air, and lack of air  
filters. Failure to follow this warning can lead to premature  
furnace failure and/or vent failure which could result in a fire  
hazard and/or bodily harm.  
The coil MUST be installed on air discharge side of furnace.  
Under no circumstances should airflow be such that cooled,  
conditioned air can pass over furnace heat exchanger. This  
will cause condensation in heat exchanger and possible  
failure of heat exchanger which could lead to a fire hazard  
and/or a hazardous condition which may lead to bodily harm.  
Heat exchanger failure due to improper installation may not  
be covered by warranty.  
For attic installation, it is important to keep insulation 12 in.  
or more away from any furnace openings. Some types of  
insulating materials may be combustibles and may cause a  
fire hazard and property damage.  
2. In parallel airflow applications, dampers must be provided to  
direct air over furnace heat exchanger when heat is desired and  
over cooling coil when cooling is desired.  
IMPORTANT: The dampers should be adequate to prevent cooled  
air from entering furnace. If manually operated, dampers must be  
equipped with a means to prevent operation of either cooling unit  
or furnace unless damper is in full cool or heat position.  
This furnace is approved for reduced clearances to combustible  
construction, therefore, it may be installed in a closet or similar  
enclosure. Since this unit may be installed in an upflow, counter-  
flow, or horizontal position, it may be located in a basement or on  
the same level as area to be heated. In any case, unit should always  
be installed level.  
INSTALLATION  
In a basement, or when installed on floor (as in a crawlspace), it is  
recommended that unit be installed on a concrete pad that is 1 in.  
to 2 in. thick.  
Step 1Air for Combustion and Ventilation  
When installed in counterflow position, furnace must not be  
installed on combustible flooring, unless approved subbase is used.  
Also, since flue pipe is in a counterflow position, Downflow  
Conversion/Vent Guard Kit MUST be used. (Also, read page 9.)  
Installation of this furnace in an area where it will receive  
contaminated combustion air must be avoided. Such contami-  
nation would include the following: ammonia, chlorine,  
hydrogen sulfide, halogenated hydrocarbons, carbon tetra-  
chloride, cleaning solvents, hydrochloric acid, water soften-  
ing chemicals, and similar chemicals. Failure to follow this  
warning will lead to premature rusting of heat exchanger and  
possible premature furnace failure and/or vent failure which  
could result in fire hazard and/or bodily harm.  
When installed in a horizontal position, furnace may be suspended  
by using an angle iron frame, as long as total weight of both  
furnace and frame are allowed for in support calculations. (Other  
methods of suspending are acceptable.) When installed in the  
Horizontal Position, this furnace must not be installed on combus-  
tible flooring, unless the approved Horizontal Subbase is used.  
3
 
Table 2Minimum Floor Area  
For Unconfined Space  
Do not block combustion-air openings in the furnace. Any  
blockage will result in improper combustion which may result  
in a fire hazard and/or cause bodily harm.  
58CMA FURNACE  
MINIMUM SQ FT WITH  
7-1/2 FT CEILING  
INPUT BTUH  
70,000  
467  
607  
700  
793  
933  
1026  
Step 2General  
91,000  
This furnace should be installed in a location in which facilities for  
ventilation permit satisfactory combustion of oil, proper venting,  
and maintenance of ambient temperature at safe limits under  
normal conditions of use. The location should not interfere with  
proper circulation of air within the confined space. (See NFPA-31,  
Section 1.5.)  
105,000  
119,000  
140,000  
154,000  
A building can be considered as being of tight construction when:  
In addition to air needed for combustion, process air shall be  
provided as required for: cooling of equipment or material,  
controlling dew point, heating, drying, oxidation or dilution, safety  
exhaust, and odor control.  
Walls and ceilings exposed to outside atmosphere have a  
continuous water vapor retarder with a rating of 1 perm or less  
with openings gasketed or sealed, and/or  
Weatherstripping has been added on operable windows and  
doors and/or  
In addition to air needed for combustion, air shall be supplied for  
ventilation, including all air required for comfort and proper  
working conditions for personnel.  
Caulking or sealants are applied to areas such as joints around  
window and door frames, between sole plates and floors,  
between wall-ceiling joints, between wall panels, at penetra-  
tions for plumbing, electrical, and fuel lines, and at other  
openings.  
The barometric draft regulator (included with furnace) shall be  
installed in same room or enclosure as furnace in such a manner as  
to prevent any difference in pressure between regulator and  
combustion-air supply.  
If combustion and ventilation air must be supplied to an uncon-  
fined space from outside, an opening with a FREE AREA of not  
less than 1 sq in. per 1000 Btuh of total input of all appliances  
within unconfined space (but not less than 100 sq in.) must be  
provided. This opening must be located such that it can not be  
blocked at any time.  
Air requirements for operation of exhaust fans, kitchen ventilation  
systems, clothes dryers, and fireplaces shall be considered in  
determining the adequacy of a space to provide combustion-air  
requirements.  
The lack of a proper amount of combustion air can lead to serious  
furnace operational problems. Some of these problems are:  
Step 4Confined Space  
1. Excessive oil burner after-drip, and oil fumes.  
2. Sooting.  
A confined space has a volume of less than 50 cu ft per 1000 Btuh  
of the total input rating for all appliances installed in that space.  
3. Melted oil burner ignitor/relay control.  
4. Air band or air turbulator settings more open than normal.  
5. Lockouts on start-up.  
When furnace is installed in a closet or enclosure, 2 ventilation  
openings, with OPEN AREA as dimensioned in example below  
are required for combustion air. The openings should be located  
about 6 in. from top and bottom of enclosure at front of furnace.  
(See Table 3.)  
The requirements for combustion and ventilation air depend upon  
whether furnace is located in a CONFINED or UNCONFINED  
space.  
Table 3Combustion Air  
From Confined Space  
Step 3Unconfined Space  
An unconfined space must have at least 50 cu ft for each 1000  
Btuh of total input for all the appliances (such as furnaces, clothes  
dryers, water heaters, etc.) in the space.  
58CMA FURNACE  
INPUT BTUH  
LENGTH  
(IN.)  
HEIGHT  
(IN.)  
70,000-105,000  
119,000  
16  
20  
8
In unconfined spaces in buildings of conventional frame, brick, or  
stone construction, infiltration MAY be adequate to provide air for  
combustion, ventilation, and dilution of flue gases. This determi-  
nation must be made on an individual installation basis and must  
take into consideration the overall volume of unconfined space, the  
number of windows and ventilation openings, the number of doors  
to the outside, internal doors which can close off unconfined space,  
and overall tightness of building construction. Consideration must  
also be given to the amount of storage items (furniture, boxes, etc.)  
within the unconfined space which take away from the air volume.  
(See Table 2.)  
10  
NOTE: In calculating free area, consideration shall be given to  
blocking effect of louvers, grilles, or screens protecting openings.  
Screens used shall not be smaller than 1/4-in. mesh and shall be  
readily accessible for cleaning. If free area through a louver or  
grille is known, it shall be used in calculating size and free area  
specified. If design and free area are not known, it may be assumed  
that wood louvers have 20 percent free area and metal louvers and  
grilles have 60 percent free area. Louvers shall be fixed in open  
position or interlocked with furnace so they open automatically at  
furnace start-up and remain open during furnace operation.  
Many new buildings and homes (and older ones that have been  
weatherized) MUST BE considered as being of tight construction,  
therefore, infiltration will not be sufficient to supply necessary air  
for combustion and ventilation.  
The size of the openings depends upon whether the air comes from  
outside of the structure or an unconfined space inside the structure.  
ALL AIR FROM INSIDE THE STRUCTURE  
For a confined space, where air is taken from an interior space, 2  
permanent openings of equal area are required. One opening must  
be within 12 in. of ceiling and the other within 12 in. of floor. Each  
4
 
opening must have a free area of at least 1 sq in. per 1000 Btuh of  
total input rating but not less than 100 sq in. (See Table 4.)  
DUCT WORK RECOMMENDATIONS  
When supply ducts carry air circulated by furnace to areas  
outside spaces containing furnace, return air MUST also be  
handled by a duct sealed to furnace casing and terminating  
outside space containing furnace. Incorrect duct work termi-  
nation and sealing will create a hazardous condition which  
could lead to bodily harm.  
Table 4Combustion Air  
From Unconfined Space  
FREE AREA PER  
58CMA FURNACE  
OPENING  
INPUT BTUH  
(SQ IN.)  
70,000  
91,000  
100  
100  
105  
119  
140  
154  
105,000  
119,000  
140,000  
154,000  
Return-air grilles and warm air registers MUST NOT be  
obstructed. Failure to follow this caution will result in  
premature failure of the heat exchanger.  
The proper sizing of warm air ducts is necessary to ensure  
satisfactory furnace operation. Duct work should be in accordance  
with the latest editions of NFPA-90A (Installation of Air Condi-  
tioning and Ventilating Systems) and NFPA-90B (Warm Air  
Heating and Air Conditioning Systems) or Canadian equivalent.  
ALL AIR FROM OUTSIDE OF STRUCTURE  
If outside air is supplied to a confined space, then the 2 openings  
must be equal and located as above.  
1. If combustion air is taken through a permanent opening  
directly communicating with the outdoors, the opening shall  
have a minimum free area of 1 sq in. per 4000 Btuh of total  
input rating for all equipment in the enclosure.  
The supply duct work should be attached to flanged front opening  
provided at discharge end of furnace. The return-air duct work  
should be attached to flanged rear opening of furnace. See Fig. 2  
for dimensions of these openings.  
2. If combustion air is taken from outdoors through vertical  
ducts, the openings and ducts MUST have at least 1 sq in. of  
free area per 4000 Btuh of the total input for all equipment  
within the confined space. (See Table 5.)  
NOTE: The back (blower access opening) should not be used for  
return air.  
The following recommendations should be followed when install-  
ing duct work:  
1. Install locking-type dampers in all branches of individual  
ducts to balance out system. Dampers should be adjusted to  
impose proper static at outlet of furnace.  
Table 5Combustion Air From Outdoors  
Through Vertical Ducts  
2. A flexible duct connector of noncombustible material should  
be installed at unit on both supply- and return-air systems. In  
applications where extremely quiet operation is necessary, the  
first 10 ft (if possible) of supply and return ducts should be  
internally lined with acoustical material.  
FREE AREA PER  
58CMA FURNACE  
INPUT BTUH  
ROUND PIPE  
(IN. DIAM)  
OPENING  
(SQ IN.)  
70,000  
91,000  
17.5  
22.8  
26.3  
29.8  
35.0  
38.5  
5
6
6
6
6
6
105,000  
119,000  
140,000  
154,000  
3. In cases where return-air grille is located close to fan inlet,  
there should be at least one 90° air turn between fan inlet and  
grille. Further reduction in sound level can be accomplished  
by installing acoustical air turning vanes or lining duct as  
described in item 2 above.  
4. When a single air grille is used, duct between grille and  
furnace must be the same size as return opening in furnace.  
3. If combustion air is taken from outdoors through horizontal  
ducts, the openings and ducts MUST have at least 1 sq in. of  
free area per 2000 Btuh of the total input for all equipment  
within the confined space. (See Table 6.)  
VENTING  
Venting of furnace should be to the outside and in accordance with  
local codes or requirements of local utility.  
Table 6Combustion Air From Outdoors  
OIL-FIRED APPLIANCES SHALL BE CONNECTED TO  
FLUES HAVING SUFFICIENT DRAFT AT ALL TIMES TO  
ENSURE SAFE AND PROPER OPERATION OF APPLIANCE.  
Through Horizontal Ducts  
58CMA FURNACE FREE AREA PER OPENING ROUND PIPE  
For additional venting information, refer to ANSI/NFPA 211  
Chimney, Fireplaces, Vents, and Solid Fuel Burning Appliances  
and/or CSA B139 Installation Code.  
INPUT BTUH  
(SQ IN.)  
(IN. DIAM)  
70,000  
35.0  
7
8
91,000  
45.5  
105,000  
119,000  
140,000  
154,000  
52.5  
9
This furnace is certified for use with Type Lvent (maximum flue  
gas temperature 575°F).  
59.5  
9
70.0  
10  
10  
Vent System Inspection  
77.0  
Before furnace is installed, it is highly recommended that any  
existing vent system be completely inspected.  
When ducts are used to supply air, they must be of the same cross  
sectional area as free area of openings to which they connect.  
For any chimney or vent, this should include the following:  
1. Inspection for any deterioration in chimney or vent. If dete-  
rioration is discovered, chimney must be repaired or vent must  
be replaced.  
The minimum dimension of rectangular air ducts must not be less  
than 3 in.  
5
 
Table 7Electrical Data  
OPERATING  
VOLTAGE RANGE  
VOLTS  
HERTZ—  
PHASE—  
MAX  
UNIT  
AMPS  
MIN  
WIRE  
GAGE  
UNIT  
SIZE  
MAX WIRE  
LENGTH (FT)  
MAX FUSE OR  
CKT BKR AMPS  
Max.*  
132  
Min.*  
105-12  
120-20  
115601  
115601  
104  
104  
12.2  
15.7  
14  
12  
26  
26  
15  
20  
132  
* Permissible limits of voltage range at which unit will operate satisfactorily.  
Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.  
Time-delay fuse is recommended.  
2. Inspection to ascertain that vent system is clear and free of  
obstructions. Any blockage must be cleared before installing  
furnace.  
OIL CONNECTIONS  
Complete instructions for installing fuel oil piping can be found in  
oil burner Installation Instructions included with furnace.  
3. Cleaning chimney or vent if previously used for venting a  
solid fuel burning appliance or fireplace.  
Oil line entry holes are provided in side panels. Two holes are  
provided in each location so that a 2-pipe system may be used if  
desired.  
4. Confirming that all unused chimney or vent connections are  
properly sealed.  
An oil filter should be used with all oil burners and should be  
installed as close to burner as possible.  
5. Verification that chimney is properly lined and sized per the  
applicable codes. (Refer to list of codes in Safety Consider-  
ations section.)  
BAROMETRIC DRAFT CONTROL  
Masonry Chimneys  
The barometric draft control shipped with furnace MUST be used  
with furnace to ensure proper operation. Instructions for installing  
control are packed with control.  
This furnace can be vented into an existing masonry chimney. This  
furnace must not be vented into a chimney servicing a solid fuel  
burning appliance. Before venting furnace into a chimney, the  
chimney MUST be checked for deterioration and repaired if  
necessary. The chimney must be properly lined and sized per local  
or national codes.  
ELECTRICAL CONNECTIONS  
If furnace is vented into a common chimney, the chimney must be  
of sufficient area to accommodate the total flue products of all  
appliances vented into chimney.  
The unit cabinet must have an uninterrupted or unbroken  
electrical ground to minimize personal injury if an electrical  
fault should occur. A green ground screw is provided in  
control box for this connection.  
The following requirements are provided for a safe venting  
system:  
115-v Wiring  
1. Be sure that chimney flue is clear of any dirt or debris.  
2. Be sure that chimney is not servicing an open fireplace.  
Before proceeding with electrical connections, make certain that  
voltage, frequency, and phase correspond to that specified on unit  
rating plate. Also, check to be sure that service provided by utility  
is sufficient to handle load imposed by this equipment. Refer to  
rating plate or Table 7 for equipment electrical specifications.  
3. Never reduce pipe size below the outlet size of furnace. (See  
Fig. 2.)  
4. All pipe should be supported using proper clamps and/or  
straps. These supports should be at least every 4 ft.  
Make all electrical connections in accordance with National  
Electrical Code (NEC) ANSI/NFPA 70-2001 and any local codes  
or ordinances that might apply. For Canadian installations, all  
electrical connections must be made in accordance with Canadian  
Electrical Code CSA C22.1 or subauthorities having jurisdiction.  
5. All horizontal runs of pipe should have at least 1/4-in. per ft of  
upward slope.  
6. All runs of pipe should be as short as possible with as few  
turns as possible.  
7. Seams should be tightly joined and checked for leaks.  
8. The flue pipe must not extend into chimney but be flush with  
inside wall.  
Do not connect aluminum wire between disconnect switch  
and furnace. Use only copper wire. Failure to follow this  
caution will lead to intermittent electrical operation and/or  
fire hazard.  
9. The chimney must extend 3 ft above highest point where it  
passes through the roof of a building and at least 2 ft higher  
than any portion of a building within a horizontal distance of  
10 ft. It shall also be extended at least 5 ft above highest  
connected equipment flue collar.  
The control system depends on correct polarity of power supply.  
Connect HOT wire (H) and NEUTRAL wire (N) as shown in Fig.  
3 or 4.  
10. Check local codes for any variance.  
Factory-Built Chimneys  
A separate line voltage supply MUST be used with a fused  
disconnect switch or circuit breaker between main power panel  
and unit. (See Fig. 3 or 4.)  
Listed factory-built chimneys may be used. Refer to chimney  
manufacturers instructions for proper installation.  
Metallic conduit (where required/used) may terminate at side panel  
of unit. It is not necessary to extend conduit inside unit from side  
panel to control box.  
OIL BURNER  
This furnace is supplied with a high-pressure atomizing retention  
head-type burner (for use with grade 1 or 2 fuel oil). The mounting  
flange is fixed to burner air tube and no adjustment is required for  
insertion length.  
When replacing any original furnace wiring, use only 105°C No.  
14 AWG copper wire.  
6
 
24-V Wiring  
4. Blower access door is secured in place.  
5. Valve on oil supply line is open.  
Instructions for wiring thermostat (field supplied) are packed in  
thermostat box. Make thermostat connections as shown in Fig. 3 or  
4 at 24-v terminal board on fan timer board.  
6. RESET BUTTON on primary control is pushed down.  
7. Flame observation door and 2 cleanout access doors located at  
front of unit are closed.  
Accessories  
When installing optional accessories to this appliance, follow  
manufacturers Installation Instructions included with accessory.  
Other than wiring for thermostat, wire with a minimum of type T″  
insulation (63°F rise) must be used for accessories.  
8. Thermostat is set for heating mode and set above room  
temperature.  
If all of the above items have been performed, set main electrical  
switch to ON position and burner should start. When burner starts,  
proceed to Combustion Check section.  
HORIZONTAL OR DOWNFLOW INSTALLATION  
For horizontal installation, determine which sidewill become the  
top, when the unit is laid down. Remove the flue pipe clearance  
knock-out from the top of that side panel. Install the flue elbow so  
that it exits the cabinet of the furnace through that opening.  
Step 2Combustion Check  
In order to obtain optimum performance from oil burner, the  
following setup procedures must be followed:  
For counterflow installation, the flue pipe must exit the cabinet  
through 1 of the side panel openings (as above), then extended up  
the side of the furnace. Insure that adequate clearances to com-  
bustibles are observed. Downflow Conversion/Vent Guard Kit  
MUST be used.  
1. A test kit to measure smoke, stack draft, over-fire draft, oil  
pump pressure, CO2, and stack temperatures MUST be used in  
order to obtain proper air band setting. Although all of the  
above measurements are required for optimum setup and  
efficiency data, the most important readings that must be taken  
are smoke number, over-fire draft, stack draft, and pump  
pressure.  
Remove burner by loosening mounting nuts and turn oil burner  
slightly counterclockwise to unlock the key hole burner flange.  
Prevent putting undue strain on burner wiring. (It may be neces-  
sary to disconnect burner wiring in some cases.)  
2. The proper smoke number has been established by engineer-  
ing tests to be between 0 and 1. This degree of smoke emission  
is commonly referred to as a traceof smoke. It is recom-  
mended to use a Bacharach true spot smoke test set or  
equivalent.  
To reinstall burner, insert on the four burner studs on key hole  
burner flange and turn it clockwise to lock it and tighten nuts.  
IMPORTANT: Burner must always be installed in the upright  
3. In order to ensure proper draft through furnace, a barometric  
draft regulator (supplied with furnace) must be installed.  
position with ignition control on top.  
FILTERS  
In order for this device to function properly, barometric damper  
must be mounted with hinge pins horizontal and face of damper  
vertical. (See instructions included with damper.) The draft regu-  
lator should be adjusted after furnace has been firing for at least 5  
minutes, and set between -0.025 and -0.035 in. wc. (See Table 9.)  
Never operate unit without a filter or with filter access door  
removed. Failure to adhere to this warning could lead to a  
hazardous condition which could lead to equipment damage  
and bodily harm.  
4. The over-fire draft, which is taken through observation door  
(located in center line above burner in front panel of furnace),  
is a measurement necessary to determine if there is a blockage  
between oil burner and flue outlet.  
An external filter rack is provided as standard equipment with  
furnace. A sufficient clearance should be provided for air filter  
access. See Table 8 for filter rack flange dimensions for return air  
duct.  
There should be a total pressure drop of between 0.020 and 0.05 in.  
wc through furnace as shown in Table 9. The over-fire draft must  
be set within the range shown in Table 9.  
Table 8Filter and Flange (In.)  
UNIT  
SIZE  
AIR FILTER  
SIZE  
FLANGE OPENING  
SIZE  
Table 9Furnace Draft Conditions (In. WC)  
FURNACE  
INPUT  
FLUE  
DRAFT  
OVER-FIRE TOTAL RESTRICTION  
16 x 24 x 1  
or  
16 X 25 X 1  
DRAFT  
THROUGH  
105-12  
120-20  
15 X 23  
19 X 29  
(BTUH)  
MINIMUM MAXIMUM  
HEAT EXCHANGER  
70,000  
91,000  
-0.025  
-0.025  
-0.025  
-0.025  
-0.025  
-0.025  
0.010  
0.020  
0.025  
0.025  
0.025  
0.025  
0.020 to 0.035  
0.030 to 0.045  
0.035 to 0.050  
0.035 to 0.050  
0.035 to 0.050  
0.035 to 0.050  
20 X 30 X 1  
105,000  
119,000  
140,000  
154,000  
START-UP, ADJUSTMENT, AND SAFETY CHECKOUT  
Step 1Operational Checkout  
A reading outside the range shown in Table 9 (for example +0.1 in.  
wc) would indicate that furnace is in an extremely high-pressure  
condition in primary section. This condition may be caused by any  
of the following problems:  
DO NOT TAMPER WITH UNIT OR CONTROLSCALL  
YOUR SERVICE TECHNICIAN. Failure to follow this  
warning could result in personal and/or property damage.  
Installation of furnace is now complete. Run through the following  
checkout and ensure each item has been performed.  
a. Excessive combustion air due to air shutter being too wide  
open.  
1. Correct nozzle size has been selected for desired input rate.  
2. Blower wheel support is removed.  
b. A lack of flue draft (chimney effect) or some other  
blockage, such as soot, in secondary section of heat  
exchanger.  
3. Electrical wiring is completed according to Fig. 3 or 4.  
7
 
8
 
9
 
c. Use of an oversized nozzle input.  
d. Pump pressure over values listed in Table 10.  
When operating furnace in heating mode, static pressure and  
temperature rise (supply-air temperature minus return-air  
temperature) must be within those limits specified on rating  
label. Failure to follow this warning could lead to severe  
furnace damage.  
5. The CO2 and stack temperature instruments enable you to  
obtain data required to determine thermal efficiency of fur-  
nace.  
6. An oil filter should be installed as close to burner as possible  
with ALL oil burners and is essential on lower firing rate  
burners. We recommend the use of a low pressure drop oil  
filter such as the General Filter, Inc. model #1A-25A or  
equivalent.  
Adjust fan speed ACCORDING TO OIL INPUT SELECTED so  
that temperature rise is within rise range specified on rating plate.  
(See Table 11.) Consult wiring diagram for speed changes on  
direct-drive motor.  
7. The oil pressure regulator is factory set to give oil pressure of  
100 psi for the model having 105,000 BTUH input and 100 psi  
for the model having 119,000 BTUH input. The firing rate  
noted on nameplate may be obtained using the nozzles and  
pump pressures indicated in Table 10.  
Table 11Speed Selection  
FURNACE  
INPUT  
(BTUH)  
RECOMMENDED  
BLOWER  
UNIT  
SIZE  
Table 10Burner Input and Nozzle Size at 100 psi  
SPEED  
Pump Pressure  
70,000/119,000  
91,000/140,000  
Med-Low  
Med-High  
High  
105-12/  
120-20  
FURNACE  
INPUT  
(BTUH)  
INPUT  
USGPH  
REAL PUMP SPECIFICATION  
PRESSURE PUMP PRESSURE  
105,000/154,000  
.
NOZZLE  
70,000  
91,000  
0.50  
0.65  
0.75  
0.85  
1.00  
1.10  
0.50-70W  
0.55-70B  
0.65-70B  
0.75-70B  
0.85-70B  
0.85-70B  
100  
140  
133  
128  
138  
167  
100  
140  
130  
130  
140  
170  
To adjust fan off time, set DIP switches on control board to obtain  
desired timing. (See Fig. 5.)  
105,000  
120,000  
140,000  
155,000  
1
2
1
2
1
2
1
2
8. On a new installation, air entrapped in oil line leading from  
tank to nozzle must be thoroughly purged in order to prevent  
excessive after drip. The oil pump is provided with a special  
fitting which allows purging of any air between tank and oil  
pump. The proper procedure for performing this operation is  
as follows:  
60 Sec  
90 Sec  
120 Sec  
150 Sec  
DELAY OFF DIP SWITCH SETTINGS  
A95115  
Fig. 5Fan Off Time DIP Switch Settings  
(Black Box Represents Switch Position)  
a. Place a piece of clear plastic 1/4 in. diameter tubing over  
purge fitting on oil pump.  
b. Start oil burner, then open purge fitting and allow burner to  
run until purge tube is completely free of air bubbles.  
Step 4Limit Control Check  
After furnace has been in operation for at least 15 minutes, restrict  
return-air supply by blocking filters or closing return registers and  
allow furnace to shut down on high limit. The burner should shut  
off, and main blower should continue to run.  
c. Tighten purge fitting. Allow oil to run to nozzle and fire  
burner.  
d. If purging takes longer than 15 sec and no flame has been  
established, burner stops. Push reset button on front of  
primary control to restart burner.  
Remove restriction, and burner should come back on in a few  
minutes.  
e. For detailed information on operation of primary control,  
refer to instructions included with furnace.  
Step 5For Year-Round Air Conditioning  
After all the setup procedures mentioned above have been com-  
pleted, the burner should be allowed to operate and an inspection  
mirror should be used to observe the flame pattern at tip of nozzle.  
Any irregularities such as burning to 1 side or pulsating flame  
patterns should be corrected by changing nozzle.  
This furnace is designed for use in conjunction with cooling  
equipment to provide year-round air conditioning. The blower has  
been sized for both heating and cooling, however, fan motor speed  
may need to be changed to obtain necessary cooling airflow.  
Step 6Heating  
Step 3Fan Adjustment Check  
The blower speed is factory set to deliver required airflow at  
normal duct static pressure.  
This furnace is equipped with a 4-speed direct-drive motor to  
deliver a temperature rise within range specified on rating plate,  
between return and supply plenums, at external duct static pressure  
noted on rating plate.  
Step 7Cooling  
The blower speed may be field adjusted to deliver required airflow  
for cooling application. (See Table 12.)  
Step 8Constant Blower Switch  
This furnace is equipped with a constant low-speed blower option.  
Whenever room thermostat is not calling for heating or cooling,  
blower runs on low speed in order to provide air circulation. If  
constant blower option is not desired, the rocker switch on top of  
cabinet may be used to turn off constant speed.  
10  
 
Table 12Airflow Data (CFM)  
EXTERNAL STATIC PRESSURE IN. WC  
UNIT  
SIZE  
BLOWER  
SPEED  
0.2  
0.3  
0.4  
0.5  
1250  
950  
0.6  
1170  
885  
0.7  
1030  
820  
0.8  
925  
0.9  
805  
670  
500  
665  
1336  
1217  
938  
653  
High  
Med-High  
Med-Low  
Low  
1425  
1130  
840  
1350  
1045  
810  
1305  
1000  
770  
745  
105-12  
120-20  
740  
685  
635  
580  
725  
730  
740  
745  
730  
715  
690  
High  
2080  
1892  
1556  
1221  
2041  
1859  
1475  
1164  
1965  
1770  
1394  
1081  
1864  
1675  
1318  
998  
1702  
1550  
1211  
926  
1576  
1449  
1134  
855  
1474  
1330  
1051  
782  
Med-High  
Med-Low  
Low  
NOTES:  
1. Airflow values in cubic ft per minute (CFM) rounded to nearest 5 CFM.  
2. Data taken with filters in place.  
MAINTENANCE  
ALWAYS KEEP MAIN OIL VALVE TURNED OFF IF  
BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF  
TIME.  
Step 2Oil Burner  
The ability to properly perform maintenance on this equip-  
ment requires certain expertise, mechanical skills, tools, and  
equipment. If you do not possess these, do not attempt to  
perform any maintenance on this equipment other than those  
procedures recommended in the Users Manual. FAILURE  
TO FOLLOW THIS WARNING COULD RESULT IN  
POSSIBLE DAMAGE TO THIS EQUIPMENT, SERIOUS  
PERSONAL INJURY, OR DEATH.  
For optimum performance, oil burner nozzle should be replaced  
once a year. Contact your service technician if you are unsure of  
this procedure.  
The procedure for nozzle installation and/or replacement is out-  
lined in oil burner instruction manual which came with furnace.  
After replacement of nozzle, burner should be adjusted in accor-  
dance with Combustion Check section of this instruction.  
Step 3Heat Exchanger and Flue Pipe  
Ordinarily, it is not necessary to clean heat exchanger or flue pipe  
every year, but it is necessary to have your service technician  
check unit before each heating season to determine whether  
cleaning or replacement of parts is required.  
Before performing any service functions, unless operations  
specifically require power to be on, make sure all utilities are  
turned off upstream of appliance. Failure to comply with this  
warning will cause a fire hazard and/or bodily harm.  
If cleaning is necessary, the following steps should be performed:  
1. Turn off all oil and electrical supplies upstream of furnace.  
To avoid personal injury, make sure electrical supply power  
is off before servicing. Failure to follow this warning could  
lead to electrical shock, fire, or death.  
If furnace has been in operation, some surfaces may be hot.  
Allow time for unit to cool down personal injury will result.  
Step 1General  
2. Disconnect flue pipe.  
In order to keep this furnace in good operating condition and to  
maintain its warranty, the furnace MUST be serviced on an annual  
basis. This servicing includes a nozzle change, a burner inspection,  
a visual check of tube passages through flue outlet and cleanout  
ports, and a visual inspection of combustion chamber when burner  
is removed.  
3. Remove flue collar panel located in front part of furnace.  
4. Remove baffle from secondary heat exchanger.  
5. Disconnect oil line and remove oil burner from furnace.  
6. Open 2 cleanout doors located in upper part of front panel of  
furnace.  
Depending on above inspection, service could also include a  
cleaning and vacuuming of heat exchanger tubes and possibly the  
heat exchanger drum section.  
7. Clean secondary tubes, and primary cylinder with stiff brush  
and vacuum cleaner.  
8. Before re-assembly, the heat exchanger and combustion  
chamber should be inspected to determine if replacement is  
required.  
Removal of any heat exchanger components which are sealed by  
gaskets requires replacement of gasket.  
9. After cleaning, replace baffle, flue collar plate, oil burner, and  
close the 2 cleanout access doors. Reconnect flue pipe and oil  
line.  
Failure to replace any heat exchanger gaskets with new  
gaskets when any heat exchanger plates or covers are re-  
moved could lead to heat exchanger leakage, sooting, and/or  
a hazardous condition capable of causing bodily harm.  
10. Re-adjust burner for proper operation.  
Step 4Blower Removal  
This furnace should never be operated without an air filter.  
Disposable filters should be replaced at least once a year. If  
equipped to provide cooling, filters should be replaced a minimum  
of twice a year. Permanent filters should be cleaned at least twice  
a year.  
To remove blower from furnace:  
1. Turn off all oil and electrical supplies upstream of furnace.  
2. Remove burner access and blower door.  
3. Remove blower retaining screw (on blower shelf).  
11  
 
4. Remove cover from control box and disconnect thermostat  
and power wires from the board.  
6. Reverse items 1 through 5 to re-install blower. Refer to wiring  
diagram (Fig. 3 or 4) of these instructions or diagram located  
on inside of blower door to properly rewire unit.  
5. Slide blower forward on rails toward front of unit.  
Copyright 2003 CARRIER Corp. 7310 W. Morris St. Indianapolis, IN 46231  
58cma4si  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book  
Tab 6a 8a  
1
4
PC 101  
Catalog No. 53580076  
Printed in U.S.A.  
Form 58CMA-4SI  
Pg 12  
9-03  
Replaces: 58CMA-3SI  
 

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