Lennox International Inc. TUA100S User's Manual
Contents
1. GAS FLOW DRIP LEG FIGURE 9 Leak Check After gas piping is completed carefully check all piping connections field and factory for gas leaks Use a soap solution or other preferred means CAUTION DO NOT use matches candles flame or other sources of ignition to check for gas leaks IMPORTANT The heater and its individual shut off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1 2 psig 3 45kPa The appliance must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve during any pressure testing of the gas supply system at test pressures equal to or less than 1 2 psig 3 45kPa See figure 10 NOTE In case emergency shutdown is required shut down main gas valve and disconnect main power to unit These devices should be properly labeled by the installer GAS SUPPLY TO UNIT HEATER MANUAL MAIN SHUT QFF VALVE WILL NOT HOLD NORMAL TEST PRESSURE ISOLATE GAS VALVE UNIT HEATER Page 13 START UP AND OPERATION Operation for Honeywell VR8205 Series Gas Valve Figure 11 FOR YOUR SAFETY READ BEFORE LIGHTING Electric shock hazard Can cause injury or death Do not use this heater if any part has been under water Immediately call a qualified service technician to in spect the furnace and to replace any part of the control system and any gas con trol which h2. TYPE B 1 VENT SLOPE 1 4 INCH FOR 1 FOOT RUN MINIMUM 12 30 5 CM MIN FROM WALL TO VENT TERMINATION VENT TERMINATIO TERMINATIONS MAY USE WIRE MESH BIRD SCREEN A at LISTED THIMBLE THROUGH COMBUSTIBLE WALL 12 30 5 CM MIN FROM AIR INLET TO VENT TERMINATION MAY BE HORIZONTAL OR VERTICAL CLEARANCE 12 30 5 CM MINIMUM ABOVE HIGHEST SNOWFALL EE eh GROUND LEVEL COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER FIGURE 6 AIR INLET TERMINATION NOTE MINIMUM HORIZONTAL LENGTH 3 FT 91 4 CM NOT INCLUDING TERMINATION MAXIMUM HORIZONTAL VENT LENGTH 5 FT 1 5M PLUS ONE 90 DEGREE ELBOW Page 9 F Horizontal Venting Residential Two Pipes 1 For horizontal residential installations these units are certified as Category appliances The vent may be single wall material minimum 25 GSG 0 46mm galvanized steel or equivalent grade stainless steel or a single section of type B 1 vent installed according to the sections Venting A General Recommendations and Requirements and C Horizontal Venting 2 he vent pipe diameter for horizontal residential installations shall be 4 100mm on 45 units and 5 127mm on 60 75 100 125 units Refer to table 4 for vent diameter and termination requirements 3 The maximum vent length is 5 1 5m plus one 90 degree elbow 4 The vent must maintain a 4 rise per foot of slope upwards tow
3. 1220 1524 3 5 0 87 2 7 0 67 2 5 0 62 2 2 0 55 TUA045SN TUAOGOSN TUAO75SN TUA100SN TUA125SN No adjustment required 3 5 0 87 2 7 0 67 2 5 0 62 2 2 0 55 5001 6000 6001 7000 7001 8000 8001 9000 9001 10000 1829 2134 2134 2438 2439 2743 2744 3048 1524 1829 2 0 0 50 1 8 0 45 2 0 0 50 1 8 0 45 1 6 0 40 1 4 0 35 1 3 0 32 2 0 0 50 1 8 0 45 2 0 0 50 1 8 0 45 1 6 0 40 1 4 0 35 1 3 0 32 2 0 0 50 1 8 0 45 Page 17 TABLE 7 LP PROPANE GAS MANIFOLD PRESSURES GEL 0 2000 2001 3000 3001 4000 4001 5000 0 610 610 914 915 1219 1220 1524 TUAOA5SL TUAOGOSL 9 5 2 37 74 184 84 6 7 1 6 7 1 67 6 1 1 6 1 1 52 TUAO75SL TUA100SL in wg kPa ALTITUDE FT 5001 6000 6001 7000 7001 8000 8001 9000 9001 10000 1524 1829 1829 2134 2134 2438 2439 2743 2744 3048 5 5 1 37 4 9 1 22 FTT ETT ET 5 5 1 37 4 9 1 22 1 10 3 9 0 97 34 0 85 55 1 37 49 122 4 4 1 10 3 9 0 97 3 4 0 85 5 2 1 30 4 7 1 17 4 2 1 05 3 7 0 92 3 2 0 80 5 2 1 30 4 7 1 17 4 2 1 05 3 7 0 92 3 2 0 80 TUA125SL No adjustment required Check for proper gas flow to the unit heater 1 Operate unit at least 15 minutes before checking gas flow Determine the time in seconds for one revolution of gas through the meter 2 Compare the
4. 822 8 1 2 216 DIRECT THUMB 7 3 8 FLUE DRIVE FAN lt SCREW OUTLET ELECTRIC BOX 21 533 SITE SERVICE COMBUSTION AIR INLET ADJUSTABLE GLASS ACCESS LOUVERS DOOR SIDE VIEW BACK VIEW TABLE 1 UNIT CLEARANCES wea Imm mm m im om om im TUA45S TUA60S TUA75S 1 25 1 25 18 457 18 457 6 152 1005 TUA125S Except for listed clearance thimbles Page 2 The heater is completely assembled Two mounting brackets are included with the 45 60 and 75 size units Check the unit for shipping damage The receiving party should contact the last carrier immediately if any shipping damage is found Requirements CSA in the USA Installation of gas unit heaters must conform with local building codes or in the absence of local codes with the current National Fuel Gas Code ANSI 2223 1 Installation in aircraft hangers must be in accordance with the current Standard for Aircraft Hangers ANSI NFPA No 409 Installation in parking structures must be in accordance with the current Standard for Parking Structures ANSI NFPA No 88A Installation in repair garages must be in accordance with the current Standard for Repair Garages ANSI NFPA No 88B These units are approved for residential applications Residential applications are defined as installations for heating non living spaces that are attached to adjacent to or part of a structure that contains space for family living
5. exchanger will be adversely affected chlorine carbon tetrachloride cleaning solvent halogen refrigerants acids cements and glues printing inks fluorides paint removers varnishes or any other corrosives TABLE 2 MAXIMUM HORIZONTAL VENT LENGTHS Fu FM 25 78 20161 15 4 6 15 4 6 10 3 0 10 3 0 5 1 5 5 1 5 Venting and Combustion Air Inlet A General Recommendations and Requirements NOTE The vent is a passageway vertical or nearly so used to convey flue gases from an appliance or its vent connector to the outside atmosphere The vent connector is the pipe or duct that connects a fuel gas burning appliance to a vent or chimney The combustion air inlet is a pipe that connects the appliance to the outside atmosphere to convey oxygen from the air to the appliance burner Unit heaters must be vented in compliance with all local codes or requirements of the local utility the current standards of the American National Fuel Gas Code ANSI Z223 1 or Canada CSA B149 Installation Codes and the following instructions A vent connection flange and a combustion air pipe connection flange are attached to the back of the unit Single wall vent material shall have all seams and joints sealed with pressure sensitive aluminum tape or silicone rubber sealant Aluminum tape must meet the provisions of SMACNA AFTS 100 73 Standards The aluminum tape has a temperature rating of 400 F 204 C Silicone rubber sealant must
6. number of seconds and the gas meter size in table 8 to determine the gas flow rate Multiply the gas flow rate by the heating value to determine the unit input rate If manifold pressure is correct and the unit input rate is incorrect check gas orifices for proper size and restriction 3 Remove temporary gas meter if installed NOTE To obtain accurate reading shut off all other gas appliances connected to meter TABLE 8 Gas Flow Rate Ft Hr Seconds for 1 Gas Meter Size Revolution cuftDial icuftDial 14 12 257 116 m 25 18 10 20 20 90 18 2 82 1644 164 26 69 18 830 6 120 100 45 90 42 43 86 _ 82 35 o 30 Note Table assumes standard temperature 60 F barometric pressure 30 in Hg and fuel heating values btu cu ft Fuel heating values may vary contact local fuel supplier to obtain actual heating value of fuel being supplied Page 18 SERVICE CAUTION Turn off gas and electrical power to unit before performing any maintenance or service operations on this unit Remember to follow lighting instructions when putting unit back into operation after service or maintenance 1 Periodically examine burner flames for proper appearance during the heating season 2 Before each heating season examine the burners for any deposits or blockage that may ha
7. 0 5 CM MIN FROM WALL TO VENT TERMINATION TE L TERMINATION VENT TERMINATIO fa ft wH A tim 12 30 5 CM MIN FROM AIR INLET TO VENT ES TERMINATION MAY ISTED THIMBLE BE HORIZONTAL OR THROUGH VERTICAL CLEARANCE COMBUSTIBLE WALL 12 30 5 CM MINIMUM ABOVE WITH WATER HIGHEST SNOWFALL TRAP TO CONDENSATE DRAIN NOTE MINIMUM HORIZONTAL LENGTH 3 FT 91 4 CM NOT TERMINATIONS MAY INCLUDING TERMINATION REFER TO TABLE 2 FOR eh USE WIRE MESH BIRD RODI iE MAXIMUM LENGTH AND NUMBER OF ELBOWS SCREEN COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER FIGURE 4 CONDENSATE DRAIN THROUGH VENT TERMINATION DOWNWARD SLOPE ON HORIZONTAL VENT COMMERCIAL INSTALLATION MAY BE SINGLE WALL 26 GSG GALV OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION INSTRUCTIONS SLOPE 1 4 INCH FOR 1 FOOT RUN MINIMUM 18 12 30 5 CM MIN FROM WALL TO VENT TERMINATION AIR INLET TERMINATION VENT TERMINATIO ZR 222 H 12 30 5 CM MIN FROM HORIZONTAL VERTICAL CLEARANCE 9 THROUGH COMBUSTIBLE WALL AIR INLET TO VENT IPAE TERMINATION MAY d s THIMBLE 12 30 5 CM MINIMUM ABOVE HIGHEST SNOWFALL NOTE MINIMUM HORIZONTAL LENGTH 3 FT 91 4 CM NOT TERMINATIONS MAY INCLUDING TERMINATION REFER TO TABLE 2 FOR eh USE WIRE MESH BIRD CROOND IE iL MAXIMUM LENGTH AND NUMBER OF ELBOWS SCREEN COMMON VENTING NOT ALLOWED WH
8. EFER TO LOCAL CODES THERMOSTAT P PN XM ee il 24VAC HOT FLAME SENSOR 1 44 FS COM ONLY WITH S18 EROS 5 MANUAL FAN _ BLOWER 6G _ RED gp NO OUT THERMOSTAT ORANGE 4 d AIL sn fe RTN x O 5 HIL e TI 6 BLUE OUT E x 1 947 2 947 SPARK 4 ELECTRODE wy YELLOW VLV g GND FOR PROGRAMABLE THERMOSTAT ONLY 4 GREEN YELLOW 24V COMMON _ m INE VOLTAGE FIELD INSTALLED ee CLASS II 24 VAC FIELD INSTALLED LI ze DENOTES OPTIONAL COMPONENTS ee js Ge A pics E M as IF ANY WIRE IN THIS APPLIANCE IS REPLACED IT MUST BE REPLACED WITH WIRE OF LIKE SIZE tuse RATING AND INSULATION THICKNESS EQUIPMENT LI BENIN BR us LOW HEAT COOL WARNING IT ELECTRIC SHOCK HAZARD CAN CAUSE INJURY GROUND Ie ge ga es ag aoe ERIE OR DEATH UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES 5 SET THERMOSTAT HEAT ANTICIPATION lt HONEYWELL VALVE 7 am WHITE RODGERS VALVE 5 ROBERTSHAW VALVE m DESCRIPTION WIRING DIAGRAM COMPONENT O HEATING UNITS GAS GCI SA B6 MOTOR COMBUSTION AIR BLOWER TUAA45 60 75 100 125S N L A S F SUPERSEDES FORM NO NEW FORM No 065529500 Page 20
9. EN HORIZONTALLY VENTING THE UNIT HEATER FIGURE 5 Page 8 MODEL 60 75 60 75 60 75 100 125 100 125 100 125 INSTALLATION COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL COMMERCIAL or RESIDENTIAL HORIZONTAL VENTING RESIDENTIAL INSTALLATION TABLE 3 VERTICAL VENT REQUIREMENTS FLUE AIR VENT CAP DIA INLET DIA 3 3 FLUE TYPE AIR INLET TYPE SINGLE WALL SINGLE WALL or METAL FLEX VENT TYPE B VENT SINGLE WALL or METAL FLEX VENT CONCENTRIC SINGLE WALL or METAL FLEX VENT SINGLE WALL SINGLE WALL or METAL FLEX VENT TYPE B VENT SINGLE WALL or METAL FLEX VENT CONCENTRIC SINGLE WALL or METAL FLEX VENT SINGLE WALL SINGLE WALL or METAL FLEX VENT TYPE B VENT SINGLE WALL or METAL FLEX VENT CONCENTRIC SINGLE WALL or METAL FLEX VENT UPWARD SLOPE U L APPROVED U L APPROVED 4 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED U L APPROVED U L APPROVED 4 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED U L APPROVED U L APPROVED 5 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED MAY USE ONE SECTION OF B MAY USE ONE SECTION OF B MAY USE ONE SECTION OF B VENT MAY BE SINGLE WALL 26 GSG GALV OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION INSTRUCTIONS OR A SINGLE SECTION
10. IMUM AIR INLET MAY ALSO BE U L LISTED SINGLE WALL FLEX VENT CONNECTOR VENT TERMINATION AND AIR INLET TERMINATION Em 3 ace LISTED THIMBLE THROUGH 12 30 5 CM MINIMUM ABOVE HIGHEST SNOWFALL E COMBUSTIBLE WALL NOTE MINIMUM HORIZONTAL LENGTH 3 FT 91 4 CM NOT INCLUDING TERMINATION eh GROUND LEVEL COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER FIGURE 7 H Removal Of Unit From Common Vent In the event that an existing unit heater is removed from a venting system commonly run with separate gas appliances the venting system is likely to be too large to properly vent the remaining attached appliances The following test should be conducted while each appliance is in operation and the other appliances are not in operation yet remain connected to the common venting system If the venting system has been installed improperly the system must be corrected 3 In so far as is practical close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building Turn on clothes dryers and any appliances not connected to the common venting system Turn on any exhaust fans such as range hoods and bathroom exhausts so they will operate at maximum speed Do not operate a summer exhaust fan Close fireplace dampers 1 Seal any unused openings in the common
11. INE VOLTAGE FIELD WIRING UNIT ELECTRICAL BOX 5 EQUIPMENT GROUND Gas Connection When connecting gas supply the length of the run from the meter must be considered in determining the pipe size A line pressure of 7 w c 1 74 kPa for natural gas should be maintained when sizing piping A line pressure of 13 w c 3 23 kPa should be maintained for liquefied petroleum LP gas A minimum of 5 0 w c for natural gas or 10 4 w c for LP propane gas should be maintained for proper unit operation For correct sizing of piping refer to the American National Fuel Gas Code ANSI 2223 1 or Canada CSA B149 Installation Code or consult the utility having jurisdiction A drip leg should be installed in the vertical pipe run to the unit In some localities codes may require that a manual main shutoff valve and union furnished by installer be installed external to the unit Union must be of the ground joint type A drip leg should be readily accessible to permit cleaning and emptying See figure 9 Leave a minimum of 4 102mm clearance between electric box and drip leg A 1 8 NPT plugged tap shall be installed immediately upstream of the gas supply connection to the heater NOTE Compounds used on threaded joints of gas piping must be resistant to the actions of liquefied petroleum gases GAS SUPPLY CONNECTION MANUAL MAIN SHUT OFF VALVE Furnished by Installer GROUND F JOINT UNION 1 8 PLUGGED
12. ME INSTALLATION rema INSIRUCTIONS TUA S N L A S F 045 060 075 100 125 Lennox Industries Inc Dallas Texas USA T CLASS SEPARATED COMBUSTION UNIT HEATERS Unit Dimensions cece eee eee ees lige Leak MCC RR ST 13 SNIPEN E 3 otart Up Operation reticere ene 14 Heating Sequence of Operation 16 Unit Heater Installation 4 Ignition Gontrol a e 16 Combustion amp Ventilation 4 50 eo 17 Pll sane EN SR i o RR 5 uro ES 19 Electrical Connections 12 Wiring Diagram pedet uec a evo Ens 20 Gas 13 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life WHAT TO DO IF YOU SMELL GAS Do not store or use gasoline or Do not try to light any appliance other flammable vapors and Extinguish any open flame liquids in the vicinity of this or any Do not touch any electrical switch do not use any other appliance 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 depa
13. NE SECTION OF B VENT 25 MAY USE ONE SECTION OF B VENT 5 MAY USE ONE SECTION OF B VENT 5 MAY USE ONE SECTION OF B VENT G Horizontal Venting Concentric Kit Residential 1 For horizontal residential installations the 45 60 75 units are certified as Category appliances with a concentric vent adapter cap kit The only concentric vent adapter cap kits that may be used are the kits supplied by Advanced Distributor Products The vent used to connect from the concentric adapter to the unit may be single wall material minimum 25 GSG 0 46mm galvanized steel or equivalent grade stainless steel installed according to the sections Venting A General Recommendations and Requirements and C Horizontal Venting General and G Horizontal Venting Concentric Kit Residential Refer to figure 7 The air inlet may be single wall material or U L listed single wall flex vent connector 2 he vent pipe diameter for horizontal residential installations shall be 4 100mm on 45 60 75 units Refer to table 4 3 The maximum vent length is 5 1 5m plus one 90 degree elbow 4 The vent must maintain a 4 rise per foot of slope upwards toward the termination HORIZONTAL VENTING CONCENTRIC VENT INSTALLATION VENT AND AIR INLET CONNECTORS FROM UNIT TO CONCENTRIC ADAPTER MAY BE SINGLE WALL 26 GSG GALV OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION INSTRUCTIONS SLOPE VENT 1 4 INCH FOR 1 FOOT RUN MIN
14. THE ANNULAR SPACE OF THE B VENT used as an alternative to the thimble When using a type B 1 vent termination use the clearances specified by the vent manufacturer Seal the connection between the single wall and double wall pipes and the annular space of the double wall pipe as shown in figure 2 Inside edge of vent termination tee or Belmont cap must be at least 12 inches from outside wall as shown in figure 3 9 All horizontal vents must terminate with a tee or with a cap as specified in table 4 Opening end of tee used for termination must face downward Addition of 4 6mm mesh corrosion resistant material as a bird screen in the tee or cap openings may be used horizontal venting the vent pipe shall be supported with hangers no more than 3ft 1m apart to prevent movement after installation 10 Clearance to combustible material is 6 152mm for single wall vent material except where a listed clearance thimble is used Clearance to combustible material for type B 1 vent or factory built chimney is per manufacturers instructions Clearance to combustible material is 1 at the sides 1 below and 3 above on horizontal installations of the concentric vent adapter cap kit D Horizontal Venting Commercial 1 Horizontal commercial installations are for buildings that are not attached to living spaces The vent may be single wall vent material installed according to the sections Venting A General Recommendations and Requ
15. URE PRESSURE TAP TAP GAS VALVE KNOB SHOWN IN OFF POSITION FIGURE 12 5 Turn knob on gas valve 180 either way to OFF 6 Wait five minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you do not smell gas go to next step 7 Turn knob on gas valve 180 either way to ON 8 Close unit door 9 Turn on electrical power to unit 10 Set thermostat to desired setting 11 The combustion air blower will start The burners will light within 40 seconds 12 If unit does not light first time gas line not fully purged it will attempt up to two more ignitions before locking out 13 If lockout occurs repeat steps 1 through 10 14 If appliance still will not operate follow the instructions To Turn Off Gas to Unit and call your service technician or gas supplier Page 15 Gas Valve Operation for Robertshaw 2000DER Series Valve Figure 13 1 STOP Read the safety information at the beginning of this section 2 Set the thermostat to lowest setting 3 Turn off all electrical power to appliance 4 This appliance is equipped with an ignition device which automatically lights burner DO NOT attempt to light the burners manually ROBERTSHAW 2000DER GAS VALVE MANIFOLD PRESSURE TAP GAS VALVE KNOB SHOWN IN OFF POSITION INLET MANIFOLD PRESSURE PRESSURE ADJUSTMENT SCREW TAP UNDER CAP FIGURE 13 5 Depre
16. a where condensate dripping may be troublesome and may cause some staining Avoid windows where steam may cause fogging or ice buildup When horizontally vented minimum clearance for termination from any door window gravity air inlet gas or electric meter regulators and relief equipment is 4 ft 1 2m for U S installations Refer to NFPA 54 ANSI Z223 1 in the U S A and CSA B149 1 and 2 in Canada or with authorities having local jurisdiction In Canada vent termination must have a minimum 6 ft 1 8mm horizontal clearance from gas and electric meters and relief devices as specified in the Canadian B149 1 Natural Gas Installation Code Vent termination must be a minimum of 4 1 2m below or 4 1 2m horizontally from any soffit vent or under eave vent Vent must be a minimum of 6 from an inside corner formed by two exterior walls If possible leave a 10 clearance Vent termination must be a minimum of 10 3m from any forced air inlet includes fresh air inlet for other appliances such as a dryer When termination is routed through an exterior combustible wall the vent must be supported using a listed clearance thimble Where local authorities permit a single section of type B 1 vent pipe may be Page 6 9 For DOUBLE WALL TYPE B 1 TERMINATION ROOF FLASHING ROOF PITCHED FROM 0 TO 45 12 MAX CLEARANCE TO BE AS SPECIFIED ON TYPE B VENT PIPE SEAL JOINT m WALL VENT AND B VENT AND
17. age 4 Secure mounting brackets to unit with retained SCrews 6 To support unit secure mounting bracket to ceiling joist or truss Unit may also hang on rods as shown in figure 1 100 and 125 size units may not be inverted 3 8 X 16 threaded inserts are provided in the top the cabinet Two threaded inserts are along one edge of the cabinet two inserts are in the panel that divides the heat exchanger section from the control compartment 1 Cut threaded rods to desired length and thread a 3 8 nut onto the rod 2 Slide a flat washer onto the threaded rod AFTER the nut 7 16 I D X 1 O D X 1 16 THK washer 3 Screw the rods four into the threaded inserts on the unit 4 Tighten nuts to secure unit to rods Combustion and Ventilation Air Adequate facilities for supplying air for combustion and ventilation must be provided All gas fired appliances require air to be used for the combustion process If sufficient quantities of combustion air are not available the heater or another appliance will operate in an inefficient manner resulting in incomplete combustion which can result in the production of excessive carbon monoxide CAUTION Insufficient combustion air can cause headaches nausea dizziness asphyxiation or death This unit must be provided with a combustion air pipe that is connected to the outside atmosphere Outdoor air used for combustion must be free of the following substances or the life of the heat
18. ance 4 This appliance is equipped with an ignition device which automatically lights burners DO NOT attempt to light the burners manually 5 Turn the manual knob on gas valve clockwise to OFF Do not force 6 Wait five 5 minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you do not smell gas go to next step 7 Turn manual knob on gas valve counterclockwise to ON 8 Close the unit door 9 Turn on all electric power to unit 10 Set thermostat to desired setting 11 The combustion air blower will start The burners will light within 40 seconds 12 If unit does not light first time gas line not fully purged it will attempt up to two more ignitions before locking out 13 If lockout occurs repeat steps 1 through 10 14 If appliance still will not operate follow the instructions To Turn Off Gas to Unit and call your service technician or gas supplier Gas Valve Operation for White Rodgers 36E Series Valve Figure 12 1 STOP Read the safety information at the beginning of this section 2 Set thermostat to lowest setting 3 Turn off all electrical power to appliance 4 This appliance is equipped with an ignition device which automatically lights burner DO NOT attempt to light the burners manually WHITE RODGERS 36E GAS VALVE MANIFOLD PRESSURE ADJUSTMENT SCREW MANI FOLD INLET PRESS
19. ard the termination General and F Horizontal Venting Residential Two Pipes Refer to figure 6 100 125 100 125 INSTALLATION RESIDENTIAL RESIDENTIAL COMMERCIAL COMMERCIAL RESIDENTIAL RESIDENTIAL COMMERCIAL COMMERCIAL RESIDENTIAL COMMERCIAL TABLE 4 HORIZONTAL VENT REQUIREMENTS FLUE TYPE SINGLE WALL SINGLE WALL PIPE or METAL FLEX VENT CONCENTRIC SINGLE WALL PIPE or METAL FLEX VENT SINGLE WALL SINGLE WALL PIPE or METAL FLEX VENT CONCENTRIC SINGLE WALL PIPE or METAL FLEX VENT SINGLE WALL SINGLE WALL PIPE or METAL FLEX VENT CONCENTRIC SINGLE WALL PIPE or METAL FLEX VENT SINGLE WALL SINGLE WALL PIPE or METAL FLEX VENT CONCENTRIC SINGLE WALL PIPE or METAL FLEX VENT SINGLE WALL SINGLE WALL PIPE or METAL FLEX VENT SINGLE WALL SINGLE WALL PIPE or METAL FLEX VENT FLUE DIA Page 10 VENT CAP INLET AIR CAP TEE or 4 BELMONT TEE or 3 BELMONT 4 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED TEE or 3 BELMONT TEE or 3 BELMONT 4 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED TEE or 5 BELMONT 4 BELMONT 4 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED TEE or 4 BELMONT 4 BELMONT 4 CONCENTRIC VENT ADAPTER CAP KIT REQUIRED TEE or L3 BELMONT TEE or 4 BELMONT TEE or 5 BELMONT TEE or 4 BELMONT MAX VENT LENGTH MIN VENT LENGTH 3 5 MAY USE ONE SECTION OF B VENT 25 MAY USE ONE SECTION OF B VENT 5 MAY USE O
20. as been under water A WARNING Danger of explosion Can cause injury or product or property damage If over heating occurs or if gas supply fails to shut off shut off the manual gas valve to the appliance before shutting off electri cal supply Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power supplies Danger of explosion and fire Can cause injury or product or property damage You must follow these instructions exactly BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand do not try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion These unit heaters are equipped with an automatic spark ignition system There is no pilot In case of a safety shutdown move thermostat switch to OFF then return the thermostat switch to HEAT position Pagel4 1 STOP Read the safety information at the beginning of this section 2 Set thermostat to lowest setting l HONEYWELL VR8205 SERIES GAS VALVE MANIFOLD PRESSURE ADJUSTMENT SCREW PRESSURE TAP 3 Turn off all electrical power to appli
21. ct spark ignition system There is no pilot necessary as the spark lights the main burner as the gas valve is turned on The direct spark ignition control board emits radio noise as the sparking process is underway The level of energy may be sufficient to disturb a logic circuit in a microprocessor controlled thermostat It is recommended that an isolation relay be used when connecting the unit heaters to a microprocessor controlled thermostat Install the thermostat according to instructions provided Select circuit protection and wire size according to the unit rating plate Install a separate disconnect switch protected by either fuse or circuit breaker near the unit so that power can be turned off for servicing Connect wiring through knockout on the junction box located on the side of the unit heater Refer to heater wiring diagram for connection information Use 18 gauge wire or larger for thermostat connections Page 12 Electrically ground unit in accordance with local codes or in the absence of local codes in accordance with the current National Electrical Code ANSI NFPA No 70 in the U S A and in Canada with the current Canadian Electrical Code Part 1 CSA C22 1 Make line voltage connections as shown in figure 8 Connect field wiring as shown on wiring diagram on unit Also refer to typical diagram in this manual An additional thermostat wire must be run to terminal G on heater when continuous blower is desired L
22. have a temperature rating of 482 F 250 C i e Dow Corning RTV 736 or equivalent All joints shall be secured with at least two corrosion resistant screws All joints must be checked for gas tightness after installation Single wall vent shall not pass through any attic interior wall concealed space or floor B Vertical Vents Using Metal Vent Pipe Commercial and Residential Installations These separated combustion unit heaters are listed as Category appliances for vertical vent installations 1 These unit heaters are to be vented with NFPA or ANSI approved chimneys U L listed type B 1 gas vents single wall metal pipe or listed chimney lining system for gas venting where applicable as well as the modifications and limitations listed in figure 2 Seal single wall vent material according to the section A General Recommendations Requirements Air inlet pipe may be single wall metal pipe or U L listed single wall metal flex connector A concentric vent adapter cap kit as specified in these instructions may be used for vertical termination Refer to table 3 2 he vent connector shall be 3 76mm diameter on 45 units 4 100mm diameter on 60 75 units and 5 127mm on 100 125 units The air inlet pipe shall be 3 76mm diameter on 45 units and 4 100mm diameter on 60 75 100 125 units Keep the vent and air inlet runs as short as possible with a minimum number of elbows Refer to the American National Fue
23. horities figure 5 For upward sloped vent a condensate tee and drain must be installed within the first 5 1 5m from the unit heater to protect the appliance If a flexible condensate drain line is used the drain line must include a loop filed with water to prevent combustion products from entering the structure If the unit is shut down for an extended period of time and will be exposed to sub freezing temperatures the condensate may freeze CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP UPWARD SLOPE ON HORIZONTAL VENT COMMERCIAL INSTALLATION MAY BE SINGLE WALL 26 GSG GALV OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION INSTRUCTIONS SLOPE 1 4 INCH FOR 1 FOOT RUN MINIMUM 12 30 5 CM MIN FROM WALL TO VENT TERMINATIO TERMINATIONS MAY USE WIRE MESH BIRD qae SCREEN 12 30 5 CM MIN FROM AIR INLET TO VENT TERMINATION MAY BE HORIZONTAL OR VERTICAL CLEARANCE 12 30 5 CM MINIMUM ABOVE HIGHEST SNOWFALL som a oe GROUND LEVEL it Dimas Xl LISTED THIMBLE THROUGH COMBUSTIBLE WALL AIR INLET TERMINATION VENT TERMINATION S p i P n LOOP WITH WATER TRAP TO CONDENSATE DRAIN NOTE MINIMUM HORIZONTAL LENGTH 3 FT 91 4 CM NOT INCLUDING TERMINATION REFER TO TABLE 2 FOR MAXIMUM LENGTH AND NUMBER OF ELBOWS COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER FIGURE 3 Horizontal Venting Concentric Kit C
24. ical vent of at least 1 4 per foot 1mm per 50mm All vertical type B 1 vents single wall vents or listed chimney lining system must be terminated with a listed vent cap or listed roof assembly The vent must extend at least 3 1m above the highest point where it passes through a roof of a building and at least 2 0 6m higher than any part of a building within a horizontal distance of 10 3 05m unless otherwise specified by the American National Fuel Gas Code ANSI 2223 1 or Canada CSA B149 Installation Codes The vent must extend at least 5 1 6m above the highest connected equipment flue collar Page 5 VENT AND AIR INTAKE TERMINATION ON SINGLE WALL VENT SINGLE WALL TERMINATION ROOF FLASHING ROOF PITCHED FROM 0 TO SHALL NOT BE A CONCEALED SPACE 2 CLEARANCE THIMBLE FIGURE 2 C Horizontal Venting General Common venting is not allowed with horizontal vent The minimum horizontal vent length is three feet 914mm i 6 8 If possible do not terminate the horizontal vent through a wall that is exposed to prevailing wind Exposure to excessive winds can affect unit performance If such a termination is necessary use a wind block to protect the vent termination from direct winds Vent termination must be free from obstructions and at least 12 306mm above grade level and maximum snow height Do not terminate vent directly below roof eaves or above a walkway or any other are
25. irements and C Horizontal Venting General and D Horizontal Venting Commercial Refer to figures 3 4 and 5 The air inlet may be single wall vent material or U L listed single wall flex connector 2 Refer to table 2 for maximum vent lengths The vent pipe diameter for horizontal commercial installations shall be 3 76mm on 45 units 4 100mm on 60 75 units 5 127mm on 100 125 units E 3 The air inlet diameter shall be 3 76mm on 45 60 75 units and 4 100mm on 100 125 units Refer to table 4 for diameter and termination requirements Select a wall termination point that will maintain 14 rise per foot slope of horizontal run of vent pipe The vent may be single wall material minimum 26 GSG 0 46mm galvanized steel or equivalent grade stainless steel Seal single wall vent material according to the section A General Recommendations and Requirements In areas where local authorities having jurisdiction permit a downward slope of maximum per foot is also acceptable In such cases the vent must be listed special vent for Category Ill appliances or single wall vent pipe constructed of number 26 GSG 0 46mm galvanized steel or equivalent grade stainless steel Seal single wall vent material according to the section A General Recommendations and Requirements Condensate drainage can be collected in a tee pipe section figure 4 or allowed to drip through the vent termination if permitted by local aut
26. l Gas Code ANSI Z223 1 or Canada CSA B149 Installation Code for maximum vent and vent connector lengths Horizontal run of the vent connector from the induced draft blower to the chimney vent cannot exceed the values in table 2 Single wall vent connector shall not be insulated If a single wall vent is used in an unheated area it shall be insulated with a minimum of 1 2 thick foil faced fiberglass 1 1 2 density insulation Failure to do so will result in condensation of flue gases The unit may be vented verticaly as a single appliance or as a common vent with other gas fired appliances In common venting situations vent connectors for other appliances must maintain a 4 100mm vertical separation between the vent connectors Refer to common venting tables in the American National Fuel Gas Code ANSI Z223 1 or Canada CSA B149 Installation Code for proper vent size Clearance to combustible material is 6 152mm for single wall vent material except where a listed clearance thimble is used Clearance to combustible material for type B 1 vent or factory built chimney is per manufacturers instructions Clearance to combustible material is 1 on vertical sections of the concentric vent adapter cap kit The vent connector shall be supported without any dips or sags Vertical vents shall be supported in accordance with their listing and manufacturers instructions All horizontal vent connector runs shall have a slope up to the vert
27. llowing TABLE 5 IGNITION CONTROL LED UNIT OPERATION Slow Normal Operation No call for heat Flash Fast Normal Operation Call for heat Flash Current signal at FLAME terminal 0 6 to 1 0 microamps 2 Flashes System lockout failed to detect or sustain flame Current signal at FLAME terminal 0 6 microamps 3 Flashes Combustion air inducer proving switch failed closed before CAB is energized or failed open after CAB is energized 4 Flashes 5 Flashes Steady Off Steady On High limit or rollout switch open Flame sensed and gas valve not energized Loss of power Ignition control failure When thermostat is placed in continuous fan mode LED will slowly flash Optional Gas Conversion Kit A natural to LP propane gas changeover kit is required to convert unit Refer to the installation instructions supplied with the changeover kit for conversion procedure Page 16 ADJUSTMENTS High Altitude Units may be fired at full input up to 2000 ft 610m above sea level Above 2000 ft 610m manifold pressure must be reduced by 4 percent for each 1000 feet above sea level or as specified by local authority having jurisdiction Adjust pressure regulator to pressure shown in table 6 for natural gas and table 7 for LP propane gas The combustion air blower proving switch is factory set No adjustment is necessary Gas Pressure Check gas line pressure with unit firing at maximum rate A minimum of 5 0 w c for
28. natural gas or 10 4 w c for LP propane gas should be maintained for proper unit operation After line pressure has been checked and adjusted check manifold pressure Correct manifold pressure is shown on the unit rating plate See figures 11 12 and 13 for gas pressure adjustment screw location A natural gas to LP propane gas changeover kit is required to convert unit Refer to installation instructions provided with changeover kit for conversion procedure Limit Control The limit control switch is factory set and not field adjustable Louver Vane Adjustment Rotate louver vanes to direct airflow upward downward straight or any combination of these directions Combustion Air Inducer Proving Switch This combustion air inducer proving switch checks for proper combustion air inducer operation before allowing an ignition trial The switch is factory set and no field adjustment is necessary Flame Rollout Switch The flame rollout switch es on 45 60 or 75 units are located on the burner box top behind the ignition control board The flame rollout switch on 100 or 125 units is located on the manifold bracket above the top burner This normally closed switch opens on a temperature rise Check for adequate combustion air and proper venting before manually resetting switch TABLE 6 NATURAL GAS MANIFOLD PRESSURES in wg kPa ALTITUDE FT M MODEL 0 2000 2001 3000 3001 4000 4001 5000 0 610 610 914 915 1219
29. nstallations for heating non living spaces that are attached to adjacent to or part of a structure that contains space for family living quarters For installation in a residential garage these units must be installed so that burners and ignition source are located no less than 18 457mm above floor Heater must be located or protected to avoid physical damage by vehicles Refer to CSA B149 1 current edition Be sure to check with local codes and ordinances for additional requirements Unit Heater Installation INSTALL UNIT HEATER MOUNTING BRACKETS SUPPORT 45 60 amp 75 MODELS ONLY MOUNTING BRACKETS 45 60 amp 75 MODELS ONLY OPTIONAL INVERTED POSITION ABOVE 45 60 AND 75 MODELS ONLY FIGURE 1 45 60 and 75 size units may be installed in the normal position or inverted 180 as shown in figure 1 depending on desired location as governed by clearances vent connection air direction gas supply electrical supply and service accessibility 1 Rotate louvers directing airflow as desired 2 Choose location for mounting brackets 3 Remove the mounting brackets from their shipping location attached to the top of the unit and replace the screws that held the brackets in their shipping location 4 Remove and retain screws along top edge bottom edge when inverted of front of unit 5 Align screw holes on mounting bracket with holes along top edge either upright or inverted of unit P
30. ommercial 1 Horizontal commercial installations are for buildings that are not attached to living spaces The only concentric vent adapter cap kit that may be used is the kit supplied by Lennox Industries The kit may be used with 45 60 75 units The vent used to connect from the concentric adapter to the unit may be single wall material minimum 25 GSG 0 46mm galvanized steel or equivalent grade stainless steel installed according to the sections Venting A General Recommendations and Requirements and C Horizontal Venting General and D Horizontal Venting Commercial and E Horizontal Venting Concentric Kit Commercial The air inlet may be single wall material or U L listed single wall flex vent connector 2 The vent pipe diameter for horizontal commercial installations shall be 3 76mm on 45 units and 4 100mm on 60 75 units Refer to table 4 3 Refer to table 2 for maximum vent lengths 4 Refer to figure 7 for kit termination figure 3 for Page 7 upward slope with condensate trap figure 4 for downward slope with trap and figure 5 for downward slope with condensate drain through cap where permitted by local authorities CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP DOWNWARD SLOPE ON HORIZONTAL VENT COMMERCIAL INSTALLATION MAY BE SINGLE WALL 26 GSG GALV OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION INSTRUCTIONS SLOPE 1 4 INCH FOR 1 FOOT RUN MINIMUM 12 3
31. pliances and Equipment All electrical wiring and grounding for the unit must also comply with the Canadian Electrical Code CSA C22 1 current edition These unit heaters are CSA International certified for the clearances to combustible material listed on the rating plate and table 1 Adequate clearance shall be provided around the appliance and around air inlet terminals Provision shall be made for service accessibility to the heater Note that fire protection clearances may be exceeded to provide additional space for service and accessibility GARAGE INSTALLATIONS 1 In a storage area clearance from heaters to combustible materials must be such that the material shall not attain a temperature above 160 F by continuous operation of the unit 2 Eight foot minimum clearance from the floor to the bottom of the heater must be maintained Refer to the CSA B149 Codes AIRCRAFT HANGER 1 In an area where aircraft are housed or serviced 10 minimum clearance from highest surface of aircraft to bottom of the heater must be maintained 2 n other areas 8 minimum clearance from the floor to bottom of heater must be maintained 3 Heaters should be located so as to be protected from damage from aircraft or other appliances needed for servicing of aircraft Refer to requirements of the enforcing authorities RESIDENTIAL INSTALLATIONS These units are approved for residential applications Residential applications are defined as i
32. ply Follow lighting instructions to light unit Check operation of unit Combustion Air Blower Under normal operating conditions the combustion air blower should be checked and cleaned prior to the heating season with the power supply disconnected Use a small brush to clean blower wheel 1 Check all wiring for loose connections 2 Check for correct voltage at unit unit operating 3 Check amperage draw Flue and Air Inlet Check all vent and air inlet joints for tightness Ensure that connections are sealed and that there are no Failure to Operate o Oo 2 A n If unit fails to operate check the following 1 Is thermostat calling for heat 2 Is main disconnect closed 3 Is there a breaker tripped or a fuse blown 4 s gas turned on at meter 5 s manual shutoff valve open 6 Is unit ignition system in lock out If unit locks out again call service technician to inspect unit 7 15 combustion air inducer proving switch closed Obstructed flue will cause unit to shut off at combustion air inducer proving switch Check flue passage and outlet Repair Parts When ordering repair parts include the complete unit model number listed on the unit rating plate For example TUAO45SNAF1 Page 19 N MAXIMUM LOAD NOT TO EXCEED 20 VA AT 24 V CLASS 2 ZA 2 847 USED ON 60 8 75 MODELS ONLY DISCONNECT ALL POWER BEFORE SERVICING BLUE 24V POWER R FOR PROPER GROUNDING R
33. quarters For installation in a residential garage these units must be installed so that burners and ignition source are located no less than 18 457mm above floor Heater must be located or protected to avoid physical damage by vehicles Refer to the National Fuel Gas Code ANSI 2223 1 current edition Authorities having jurisdiction should be consulted before installation The National Fuel Gas Code is available from American National Standard Institute Inc 11 West 42nd Street New York NY 10036 These units are CSA International design certified These unit heaters are certified for installation clearances to combustible material as listed in table 1 and on unit rating plate Accessibility and service clearances must be observed in addition to fire protection clearances All electrical wiring and ground for unit must be in accordance with the regulations of the current National Electric Code ANSI NFPA No 70 The National Electric Code is available from National Fire Protection Association 1 Batterymarch Park PO Box 9101 Quincy MA 02269 9101 Page 3 Requirements CSA in Canada The instructions are intended only as a general guide and do not supersede local codes in any way Authorities having jurisdiction should be consulted before installation The installation must conform with local building codes or in the absence of local codes with the current code CSA B149 1 Installation Code for Natural Gas Burning Ap
34. rtment Installation and service must be performed by a qualified installer service agency or the gas supplier P N 065354800 ORGINATED 5 04 REVISED 11 04 SUPERSEDES NEW Technical literature form number 504 955M START UP AND PERFORMANCE CHECK LIST Job Name Job Location Installer Unit Model No Electrical Connections Tight Job No City City Supply Voltage Gas Piping Connections Tight amp Leak Tested Motor Amps Unit BTU Input Line Pressure Manifold Pressure Serial No Date State Province State Province Service Technician Flue Connections Tight Unit Operation Checked THERMOSTAT Calibrated Heat Anticipator Properly Set Level 45 60 and 75 UNIT DIMENSIONS MOUNTING SLOTS Typical 5 16 x 3 Inches 8 x 76 mm DIMENSION 60 75 12 305 B_ 5 1 2 140 6 1 2 165 7 3 4 197 10 1 4 260 D t3 4 4 3 1 4 83 5 1 4 133 5 3 4 146 18 1 2 470 HANGING BRACKETS 2 7 iL GLASS ADJUSTABLE LOUVERS SIDE VIEW ELECTRICAL BOX 60 75 HANGING BRACKETS 2 FLUE OUTLET COMBUSTION AIR INLET ELECTRICAL SERE TAN BOX 45 BACK VIEW Page 1 100 and 125 UNIT DIMENSIONS THREADED STUDS 24 7 16 140 621 lL NN EXCHANGER ALUMINIZED STEEL I AS mre ODS RN CN a ES el A EC E TOP VIEW 36 1 2 32 3 8 927
35. set and no adjustment is necessary 3 After prepurge of approximately 30 seconds the Spark ignition is energized and the solenoid valves open in the gas valve 4 The spark then ignites the gas the ignition sensor proves the flame and the combustion process continues 5 In the event that the flame is not detected after the first 10 second trial for ignition the controller will repeat steps 3 and 4 an additional two times before locking out the gas valve Ignition control will then automatically repeat steps 3 4 and 5 after 60 minutes To interrupt the 60 minute lockout period move thermostat from Heat to OFF then back to Heat Heating sequence then restarts at step 1 6 The burners shall light without noticeable crossover delay There shall be no flame lifting from the burner heads flashback or burning within the burner The flames shall be predominantly blue in color and shall be approximately centered in the tubes with no apparent impingement taking place 7 The ignition control will energize the fan approximately 45 seconds after ignition is established 8 After the thermostat demand is satisfied the gas valve is closed 5 seconds after the demand is satisfied the combustion air blower is shut off 9 The control center shall shut off the system fan approximately 120 seconds after the gas valve is de energized Ignition Control LED The ignition control board contains a green LED which indicates the fo
36. ss knob on gas valve knob will snap to OFF 6 Wait five minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you do not smell gas go to next step 7 Turn knob on gas valve 90 counterclockwise to ON 8 Close unit door 9 Turn on electrical power to unit 10 Set the thermostat to desired setting 11 The combustion air blower will start The burners will light within 40 seconds 12 If unit does not light first time gas line not fully purged it will attempt up to two more ignitions before locking out 13 If lockout occurs repeat steps 1 through 10 14 If appliance still will not operate follow the instructions To Turn Off Gas to Unit and call your Service technician or gas supplier To Turn Off Gas To Unit 1 Set thermostat to lowest level 2 Turn off all electrical power to unit if service is to be performed 3 Honeywell VH8205 series valve turn knob on gas valve 90 clockwise 49 to OFF White Rodgers 36E series valves turn knob on gas valve 180 either way to OFF Robertshaw DER2000 series valves depress knob on gas valve knob will snap to OFF Heating Sequence of Operation 1 When the thermostat calls for heat the combustion air blower starts immediately 2 Combustion air inducer proving switch proves blower operation before allowing power to the ignition controller This switch is factory
37. ve occurred 3 Clean burners as follows a Turn off both electrical and gas supplies to unit b Disconnect gas supply piping high tension and sensor leads Remove gas manifold Remove burner tray c Clean burners as necessary Make sure that burner heads line up properly to ensure flame crossover Check spark gap on electrode and adjust if required The gap should be between 0 110 inch and 0 140 inch 2 79mm to 3 56mm The gap may be checked with appropriately sized twist drills or feeler gauges d Reinstall burner tray gas manifold high tension and sensor leads Reconnect gas supply piping e Restore electrical power and gas supply Follow lighting instructions to light unit Check burner flame Flue Passageway and Flue Box The flue passages and flue box should be inspected and cleaned prior to each heating season The sequence of operation should be as follows 1 Turn off both electrical and gas supply to unit 2 Disconnect combustion air blower wiring 3 Remove screws securing flue box to unit Remove flue box If necessary remove blower assembly from flue box Clean flue box with wire brush 4 Remove turbulator retention bracket and turbulators Clean turbulators with wire brush 5 Remove burners as described in section Burners section 6 Clean tubes with a wire brush 7 Reassemble unit The combustion air and flue box gaskets should also be replaced during reassembly 8 Restore electrical power and gas sup
38. venting 4 Follow the lighting instructions Place the appliance system being inspected in operation Adjust thermostat so 2 Visually inspect the venting system for proper size Spe ae Roper e ano E 5 Test for spillage at the draft hood relief opening after and horizontal pitch Determine there is no blockage or restriction leakage corrosion or other deficiencies which could cause an unsafe condition Page 11 five minutes of main burner operation Use the flame of a match or candle or smoke from a cigarette cigar or pipe 6 After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous condition of use If improper venting is observed during any of the above tests the common venting system must be corrected The common venting system should be resized to approach the minimum size as determined by using the appropriate tables in Appendix G in the current standards of the National Fuel Gas Code ANSI Z223 1 in the U S A and the appropriate Category Natural Gas and Propane appliances venting sizing tables in the current standards of the CSA B149 1 and 2 in the Natural Gas and Propane Installation Code in Canada NOTE Local codes may supersede any of the above provisions Electrical Connections NOTE These unit heaters use a dire
Download Pdf Manuals
Related Search