Installation, Operation, and Maintenance Gas Unit Heater Separated Combustion Gas-Fired Propeller Unit Heater SAFETY WARNING Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
Warnings, Cautions and Notices Warnings, Cautions and Notices. Note that warnings, cautions and notices appear at appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potential hazards that could result in death or personal injury. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that could result in equipment or property-damage-only accidents.
Warnings, Cautions and Notices WARNING Hazardous Service Procedures! The maintenance and troubleshooting procedures recommended in this manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concerning these procedures. When possible, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing.
Introduction WARNING Safety Alert! You MUST follow all recommendations below. Failure to do so could result in death or serious injury. For Your Safety The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous. If you smell gas: 1. Open windows. 2. Do not touch electrical switches. 3. Extinguish any open flame. 4. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
Table of Contents Warnings, Cautions and Notices . . . . . . . . . . 2 Model Number Descriptions . . . . . . . . . . . . . . 6 Indoor Gas Heating Units . . . . . . . . . . . . . . . 6 General Information . . . . . . . . . . . . . . . . . . . . . 7 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 General Safety Information . . . . . . . . . . . . . 7 Identification of Parts . . . . . . . . . . . . . . . . . . 8 Unit Dimensions and Weights . . . . . . . . . . .
Model Number Descriptions Indoor Gas Heating Units Digit 13 — Rooftop Heating Unit Motor Selection Note: All units are AGA approved. For CGA approved units, contact Air Handling Product Support.
General Information Description The Power Vented Gas Unit Heater is a factory assembled, power vented, low static pressure type designed propeller fan heater designed to be suspended within the space to be heated. THESE HEATERS ARE NOT TO BE CONNECTED TO DUCTWORK. The designs are certified by ETL as providing a minimum of 80 percent thermal efficiency, and approved for use in California. Do not alter these units in any way. If you have any questions after reading this manual, contact the manufacturer.
General Information should be done and checked by a qualified electrician, using copper wire only. All external wiring must conform to applicable local codes and to the latest edition of the National Electrical Code ANSI/NFPA No. 70. • • All gas connections should be made and leaktested by a suitably qualified individual, per instructions in this manual. Also follow procedures listed in “Gas Equipment Start-Up,” p. 30. Use only the fuel for which the unit heater is designed (see rating plate).
General Information Figure 3. Internal furnace assembly 1 2 3 1. Flue Collector 2. Heat Exchanger 3. Burner Drawer Figure 4. Separated Combustion Unit Heater 1 2 3 5 4 5 6 7 1. Pressure switch 5. Fan guard 2. Power vent assy. 6. Air inlet 3. Power vent motor 7. Gas supply inlet 4.
Unit Dimensions and Weights Table 1. Performance and specification data: Separated Combustion Blower Unit Heater Unit Size PERFORMANCE DATA(a) Input Output Thermal Efficiency Free Air Delivery CFM Air Temperature Rise Outlet Velocity Full Load Amps at 115V MOTOR DATA: Motor Type RPM Amps @ 115V DIMENSIONAL DATA “A” Height to Top of Unit “B” Height to Top of Hanger “C” Hanging Distance Width “D” Discharge Opening Width “E” Width of Unit “F” to Centerline of Flue Flue Size Dia.
Unit Dimensions and Weights Figure 5.
Installation: Mechanical unit heater to be mounted below 8 feet (2.4 m) above the floor, the unit heater must be equipped with an OSHAapproved fan guard. NOTICE: Equipment Damage! Do not install unit heaters in corrosive or flammable atmospheres! Premature failure of, or severe damage to the unit could result! Avoid locations where extreme drafts can affect burner operation. Unit heaters must not be installed in locations where air for combustion would contain chlorinated, halogenated or acidic vapors.
Installation: Mechanical Figure 7. Heat throw distances Unit Heater Note: Unit heater sizing should be based on heat loss calculations where the unit heater output equals or exceeds heat loss. Heater output is approximately 80 percent of input Btu/hr rating. Clearances “H” Floor Line NOTICE: Maintain Minimum Thermostat Setting! Unit heaters should not be installed to maintain low temperatures and/or freeze protection of buildings. A minimum of 50°F (10°C) thermostat setting must be maintained.
Installation: Mechanical b. Using the enclosed screws, permanently attach the top bracket. WARNING Heavy Objects! Ensure that all hardware used in the suspension of each unit heater is capable of supporting the unit weight. Failure to do so could result in unit falling off its mounting location, which could result in death or serious injury. Note: Refer to Figure 1, p. 7through Figure 9, p. 14, and dimensional data per Table 1, p. 10 for suspension of units. Figure 8. Heater mounting(a) 3.
Installation: Mechanical Note: The top and bottom panels must be attached so that the sides with the larger holes are facing the unit heater; this makes the assembly easier. Note: For 90-degree nozzle assemblies, repeat Step 8 to create a second sub-assembly. 9. For 60- and 90-degree nozzle assemblies: Using the enclosed #8-18 x 1/2 screws, attach the sub-assembly created in Step 8 to the 30-degree assembly installed to the unit (in Step 1 through Step 6 of this procedure).
Installation: Piping Gas Supply Piping WARNING Flammable Vapors! When connecting to existing gas lines be sure to valve off the gas supply ahead of connection point. To avoid explosion or possible fire, always purge all residual gas from piping before cutting into existing line or removing threaded fittings. Failure to remove all gas vapors could result in death or serious injury or equipment or property-only damage.
Installation: Piping Table 3. Gas pipe size(a) Nominal Internal 10 Iron Pipe Diameter, Size, in. in. (mm) (3.0) 1/2 Length of Pipe, ft (m) 20 (6.1) 30 40 50 60 70 80 90 100 125 150 175 200 (9.1) (12.2) (15.2) (18.3) (21.3) (24.4) (27.4) (30.5) (38.1) (45.7) (53.3) (61.0) 0.622 175 120 97 82 73 66 61 57 53 50 44 40 37 35 (16) (4.96) (3.40) (2.75) (2.32) (2.07) (1.87) (1.73) (1.61) (1.50) (1.42) (1.25) (1.13) (1.05) (0.99) 0.
Installation: Piping Pipe directly in to combination valve (see Figure 10, p. 18). 5. A 1/8 in. N.P.T. plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the gas supply connection to the appliance. 6. Provide a drip leg in the gas piping near the gas unit heater. A ground joint union and a manual gas shutoff valve should be installed ahead of the unit heater controls to permit servicing.
Installation: Piping WARNING Risk of Fire and Carbon Monoxide Poisoning with Improper Piping! Never use pipe of a diameter other than that specified in Table 1, p. 10! To prevent pipe from melting and introducing exhaust fumes into the air supply, never use PVC, ABS or any other non-metallic pipe for venting! Failure to follow these recommendations could result in death or serious injury or equipment damage. 1. The combustion air system installation must be in accordance with the latest edition of (N.F.P.
Installation: Piping as depicted in Figure 11, p. 21. 6. The equivalent length of the vent system must not be less than five feet (1.5 m) and must not exceed 50 feet (15.2 m). Equivalent length equals the total length of straight pipe plus 10 feet (3.1 m) for each 90-degree elbow and five feet (1.5 m) for each 45-degree elbow. 7. Each slip joint must be secured with at least three corrosion resistant screws. Two full turns of 3M™ #425 Aluminum Foil tape or its equivalent must be used to seal each joint.
Installation: Piping Figure 11. Vertical intake/vent installation Figure 14. Horizontal vent installation Installation: Concentric Vent Terminal WARNING Hazardous Service Procedures! Figure 12. Vertical vent installation The maintenance and troubleshooting procedures recommended in this manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concerning these procedures.
Installation: Piping Figure 15. Horizontal concentric venting Size pipes according to Table 1, p. 10. Insert the pipes through the wall and fasten the adapter box in place. Flash and/or caulk 8-inch pipe on outside wall (see Figure 16, p. 22, Step 3). Install the inlet air screen on the 8-inch pipe and fasten with sheet metal screws. Install the flue terminal on the 5-inch pipe and fasten in place (see Figure 16, p. 22, Step 4). Figure 16.
Installation: Piping Figure 17. Vertical concentric venting Figure 18. Vertical concentric venting—installation Size pipes according to Table 1, p. 10. Cut a hole through the roof for an 8-inch combustion air pipe. Fasten a length of 5-inch pipe to the exhaust connection of the concentric adapter with sheet metal screws. Use at least three screws per joint. Seal all joints with high temperature silicone sealant.
Installation: Electrical Electrical Connections WARNING Hazardous Service Procedures! The maintenance and troubleshooting procedures recommended in this section of the manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concerning these procedures. When possible, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing.
Installation: Electrical Recommended Heat Anticipator Setting Ranges: 25 ft. (7.6 m) T’stat Wiring 0.85 to 0.90 A 50 ft. (15.2 m) T’stat Wiring 0.90 to 1.1 A Max. Setting on T’stat Fan Time Delay Control Leads from the time delay controls are factory wired to the junction box. The fan control is a time delay relay (approximately 45 seconds ON, 65 seconds OFF). The fan control is rated at 17 amps. Notes: • The start-up fan delay must not exceed 90 seconds from a cold start.
Start-Up NOTICE: Equipment Damage! Never operate the unit beyond the specified limits or severe damage to, and/or premature failure of, the unit could result! Operation Explanation of Controls (see Figure 20, p. 27) WARNING Carbon Monoxide! Never operate unit heaters if the power venter is not operable. Your venting system must not be blocked by any snow, snow drifts, or any foreign matter.
Start-Up Figure 20. Burner components/unit controls (intermittent pilot ignition) Burner Drawer Common Parts: 1. 2. 3. 4. 5. 6. 7. Main Burners Burner Manifold Air Shutters Burner Springs Main Burner Orifice Transformer Pilot Tubing 1 Controls (refer to “Wiring Diagrams,” p. 40): 8A. Main Gas Valve (Honeywell) 8B. Main Gas Valve (White-Rodgers) 9. Honeywell Ignitor 10. Honeywell Pilot Burner 11. Honeywell Pilot Orifice 13.
Start-Up Checking Unit Heater Rate Table 6. Type of Gas Natural NOTICE: Overfiring! Never overfire the unit heater, as this could cause unsatisfactory operation, or shorten the life of the heater. Gas appliances are rated based on sea level operation, with no adjustment required at elevations up to 2000 feet (610 m). At elevations above 2000 feet (610 m), input ratings should be reduced by 4 percent for each 1000 feet (305 m) above sea level. Check the input rate as follows: 1.
Start-Up Figure 21. Main burner flames NORMAL (HARD FLAME) YELLOW TIPPING (MARGINAL) LIFTING (TOO MUCH AIR) YELLOW FLAME (TOO LITTLE AIR) Pilot Adjustment 1. Remove the pilot adjustment cap. 2. Adjust the pilot screw to provide a properly sized flame. 3. A proper pilot flame is a soft steady flame that envelops 3/8- to 1/2-inch (9.5 to 12.7 mm) of the thermocouple . 4. Replace the pilot adjustment cap.
Start-Up Gas Equipment Start-Up Customer _____________________________________________ Job Name & Number _________________________ Pre-Inspection Information with Power and Gas Off Type of Equip: Indoor Unit Heater Serial Number: _________________________ Model Number: _____________________________ Name Plate Voltage: ____________________ Name Plate Amperage: ______________________ Type of Gas: Tank Capacity: Natural LP _______ lb Rating: _______ kg _______ Btu @ ____ °F ________ kW @ ____ °
Maintenance WARNING Hazardous Service Procedures! The maintenance and troubleshooting procedures recommended in this section of the manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concerning these procedures. When possible, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing.
Maintenance 12. Check lubrication instructions on the motor. If oiling is required, add 3 to 4 drops of electric motor oil as follows: a. Light Duty—After 3 years or 25,000 hours of operation. b. Average Duty—Annually after 3 years or 8,000 hours of operation. c. Heavy Duty—Annually after 1 year or at least every 1,500 hours of operation. NOTICE: Equipment Damage! Never over oil the motor or premature failure could occur! 13.
Maintenance Figure 22. Power venter assembly Ref. No. Description Ref. No. Description 1 Blower Housing Assembly 15 Snap Bushing 2 Speed Nut 16 Relay (Motor) 3 Motor 17 Draftor Stack Assembly 4 Washer, Plain 18 Tubing (Aluminum) Formation 5 Plate Adapter 19 Male Connector 6 Blower Wheel (see Note 1) 20 Locknut 7 Mounting Bracket (Pressure Switch) 21 Hole Plug 8 Mounting Bracket (Junction Box) 22 Pressure Switch Cover 9 Screw, S.T.
Maintenance Installation Instructions for Field Replacement of Power Venter Motor Important: This replacement must be performed only by a qualified technician. Note: All hardware (screws, nuts, washers) that will be removed from the unit will be reused for this motor replacement. DO NOT LOSE ANY OF THESE PARTS. Figure 23. Identification of parts Ref. No. Tools and Parts Needed Wire Stripper and Crimper; Slotted Head and #2 Phillips Head Screwdriver; 3/8-in. Wrench; 1/8-in.
Maintenance How to Order Replacement Parts Please send the following information to your local Parts center; If further assistance is needed, contact the manufacturer’s customer service department. • Model number • Serial Number • Part description and Number as shown in the Replacement Parts Catalog.
Diagnostics Troubleshooting WARNING Hazardous Service Procedures! The maintenance and troubleshooting procedures recommended in this section of the manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concerning these procedures. When possible, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing.
Diagnostics Table 7. Troubleshooting guide (continued) Symptoms Possible Cause(s) Corrective Action F. 1. Shut off gas supply immediately! 1. Inspect all gas piping and repair. 2. Blocked heat exchanger/venting. 2. Clean heat exchanger/flue. 3. Drafts around heater. 3. Eliminate drafts. Refer to “Installation: Mechanical,” p. 12. 4. Negative pressure in building. 4. See “Installation: Piping,” p. 16. Clean flue collector. Gas Odor. G. Delayed ignition. H. Failure to ignite. 5.
Diagnostics Table 7. Troubleshooting guide (continued) Symptoms Possible Cause(s) Corrective Action 2. 2. Pilot adjustment screw turned too low on combination/automatic main gas valve. 3. Air in gas line. 3. Purge air from gas supply. 4. Incorrect lighting procedure. 4. Follow lighting instruction label adjacent to gas valve. 5. Dirt in pilot orifice. 5. Remove pilot orifice. Clean with compressed air or solvent. (Do not ream.) 6. Extremely high or low gas pressure. 6.
Diagnostics Table 7. Troubleshooting guide (continued) Symptoms Possible Cause(s) U. No Spark. 1. Thermostat not calling for heat. 1. Close thermostat contacts. 2. No low voltage. 2. Check for 24V across 24V terminals of S8600. 3. Spark gap closed or too wide. 3. Set gap to 0.1. 4. Broken or cracked ceramic on spark electrode. 4. Replace pilot assembly. 1. Loose S8600 connections. 1. Check all connections, term. PV feeds 24V to pilot valve. 2. Improper gas pressure. 2.
Wiring Diagrams Figure 24. Separated combustion unit, 100–400 blower, 100–250 prop.
Wiring Diagrams Figure 25. Separated combustion unit, 300–400 blower, dual prop.
Wiring Diagrams Figure 26.
Wiring Diagrams Figure 27. Separated combustion unit, 300–400 dual prop.
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