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Thermo Products
30, OPB (24, 36)- 80
service manual
Models:
30
36)- 80
OPB (24
1
8
91
91
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91 pages
61.55 Kb
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Troubleshooting
Install
J. Electrical Wiring
Maintenance
Checkout Procedure
Preferred method of adjustment
Weight
Filter replacement
Safety
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Contents
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Contents
SECTION
I. SAFETY INFORMATION
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IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE
Waterproof type connectors must be used when connecting electrical power and control wiring to the unit to prevent moisture from being drawn into the unit during operation
For initial start-upof the appliance after installation, it may be necessary to purge the air out of the oil line. A qualified heating contractor should do this
1.This appliance shall be used with only the type of fuel oil for which it is approved. Refer to the appliance-ratinglabel for the required type of fuel
III.GENERAL INSTALLATION
II. GENERAL INSTRUCTIONS
b.Non-combustiblematerial
A. Codes and Clearances
a.Combustible material
B.Selection of Installation Location
The unit is manufactured with runner supports that raise the unit, about 1.25 inches above the mounting base, allowing air circulation beneath the metal surfaces. This clearance helps to promote air circulation under the base that allows the unit to be mounted on combustible materials. This clearance also helps to reduce metal corrosion caused by a buildup of moisture under the appliance
C.Venting of Combustion Products
FIGURE 2 Vent Terminal Mounting Position
D. Condensate Drain
E. Oil Tank and Piping
5.A readily accessible, design-certified,manual oil shutoff valve, with a non- displaceable rotor member, shall be installed in the fuel oil supply piping within 6 feet of the appliance
G. Burner Specifications And Performance
F. Oil Filter
Oil Pump
H. Airflow Requirements and Sizing of Duct Work
6.The following method can be used to size ductwork when air velocities are low to moderate
h.The resistance of the take-offand the outlet register or return grill should then be summed together to determine the total pressure drop for each branch. This value should be close to the assumed value for the pressure drop of the system. If it is not close, then flowrates for each branch must be adjusted, or the design of the duct system must be altered, to give the proper pressure drops. Usually, the cross-sectionalarea of the ductwork should be changed in order to adjust the pressure drop to a suitable value
7.The supply and return air ducts, or flexible joints, should be carefully secured and sealed to the appliance housing to prevent air leakage from, or into, the duct system. For best performance, insulate the outside surfaces of the ducts to reduce heat loss from, or heat gain to, the ducts. The insulation system should be carefully selected and installed to minimize water and moisture absorption by the insulation
I.Air Filters 1.Filter Installation
J. Electrical Wiring
Typically, control wiring between the outdoor appliance and the indoor thermostat, and if used, electronic air cleaner or humidifier, will be required. Field wiring of control circuits should consist of copper conductors rated for at least 240 VAC with an insulation temperature rating conforming to Type T wire, 35C temperature rise. Depending upon code requirements, rigid or flexible conduit is recommended, and may be required. Make connections between the thermostat, and electronic air cleaner or humidifier if used, and the fan control module, inside the burner compartment. Consult the wiring diagram for the appropriate connection points on the thermostat and the fan control module
3.All wiring sizes must comply with local codes or the National Electrical Code. To minimize voltage drop to the appliance, the next larger size wire should be used when long wiring runs, in excess of 100 ft., are employed. Refer to the wiring diagrams when wiring or servicing
Figure 4 The Fan Control Module
2. Thermostat Anticipator Setting
Figure 5 Heat Anticipator Adjustment Scale
Preferred method of adjustment
3. Blower Motor Speed Selection
IV. STARTUP PROCEDURES A.Heating System
For Your Safety Read Before Operating
i.STOP! Read the safety information above
Operating Instructions
To Turn Off Oil to Appliance
2.Adjustment of Burner Combustion
g.Turn the disconnecting switch to “ON”
ii.CARBON DIOXIDE CO2 OR OXYGEN O2 Take a CO2 sample from flue passageway. It is possible to achieve readings of up to 14% CO2 or 2% O2 , but it is better to have a slightly lower CO2 or higher O2 reading with zero smoke measured. To achieve a lower CO2 reading, open the air band, or shutter, on the burner until zero smoke is measured
3.Adjustment Of Heat Input Rate
4.Setting Supply Air Temperature Rise
5.Checkout Procedure
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B.Cooling Section 1.Initial Startup
2.Definition of Subcooling
3.Condenser Subcooling
4.Definition of Superheat
5.Evaporator Superheat
V. INSTALLERS INSTRUCTIONS TO USER
VI. DEALER MAINTENANCE
B.Heat Exchanger
Remove the clean-outcovers. Also, remove the burner compartment cover, the burner, and the burner mounting plate. When removing the clean-outcovers, special care must be taken not to damage the gaskets. Should any of the gaskets separate, show evidence of cracks or breaks, or otherwise be unable to provide the necessary seal, the gasket must be replaced before reattaching the clean-outcovers, refer to Figure
Burner Operation section
Figure 10 View of OPB Heat Exchanger
C.Electrical System
1.Filter maintenance procedure
2.Filter replacement
D. Supply/Return Air Blower
E. Supply/Return Air Filter
F. Extended Appliance Shutdown
Figure 13 Location of Oil Pump Vent Plug
2.Remove the burner compartment cover
Burner Motor
The following maintenance points should be reviewed periodically to assure the heating and cooling systems continue to function properly
ducts for any signs of collapse, holes, or excessive corrosion. Repair or replace components as required
VIII. TROUBLESHOOTING
Power must be disconnected before servicing
Diagnostic Features
A.Heating System
CAD CELL CHECKOUT PROCEDURE
Number of flashes
Cad Cell Resistance in ohms
Model R7184B
2.Is the sub-baseof the thermostat switched to the “COOL” position?
IX. REFERENCES
X. APPENDIX A SOURCES FOR REFERENCED STANDARDS
XI. APPENDIX B CALCULATIONS Example
Figure 15 Plan View of a Typical Residence
Area for Example
See page 75 for a copy of the ASHRAE chart
So, the total equivalent straight duct length is
or approximately the same as without the elbow
Using the previous pressure drop equation, the pressure drop through segment “A” is 0.0321 in. W.G. Then, the pressure drop for the “D” and “E” branch is
Likewise for the other branches
PSIG
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Now, the degree of superheat can be calculated
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All installations and services must be performed by qualified service personnel
A. SEQUENCE OF OPERATIONS FOR THE HEATING SYSTEM
Standby At any time the oil
valve is not energized Start
Start trial for ignition
Control System Action
A. SEQUENCE OF OPERATIONS FOR THE HEATING SYSTEM
Standby At any time the oil
valve is not energized Start
Start trial for ignition
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IS THE PROBLEM DELAYED IGNITION?
ARE VENT TERMINAL AND HEAT EXCHANGER CLEAN?
PROPER COMBUSTION ACHIEVED?
CORRECT INSERTION OR AIR TUBE BURNOFF MAY OCCUR
EFFECTS OF PRESSURE ON NOZZLE FLOW RATE
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1.201.6 Check capacitance of the run capacitor
1Loose wire connections
3.301.2 Check for a properly sized expansion valve
Heating Performance using # 2 fuel oil
Nominal Electrical Power Requirements
Dimensions & Weight
Model No
XVI. APPENDIX G REPLACEMENT PARTS LIST
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