Bryant 394U User's Manual
Contents
1. f ee aa NC GREEN 5 GREEN l selo ATACAR TRANSFORMER Noreen e pat d 4 A j DIRECT DRIVE pom NOT USED ON ALL DIRECT DRIVE MODELS 20 pod BLACK LEAD FROM RELAY ORANGE J TO 822 REPLACES BLACK 822 WIRE SHOWN cus xum mu aum ugs mall TO BLACK TI5V LINE SPLICE BLACK BLUE WHITE amp 115 V f DIRECT DRIVE MOTOR SEE CHART BELOW RED 3 7g TERMINAL DIRECT DRIVE J BOX CAPACITOR RED WIRE ATTACHEDTO TERMINALS INDICATED DR MOTORSONLY SIZE UNIT TYPE OF BLOWER Ese d xg THE ORIGINAL WIRES ARE REPLACED THE TYPE WIRING MATERIAL MUST BE USED YELLOW RED LOW VOLTAGE WIRING 7 YELLOW YELLOW LINE VOLTAGE WIRING SPLICE Figure ll D4 or D5 Wiring Direct Drive with Secondary Limit Switch 3940 14 PILOT OR 100 SHUT OFF PILOTSTAT VALVE IvELLOW ORANGE ORANGE o cc uec PILOT X GREEN ON 1009 SHUTOFF MODELS ONLY WHERE AIR CONDITIONERS GREEN WITHOUT TRANSFORMERS ARE USED A JUMPER BETWEEN X amp G2 1S USED TRANSFORMER DIRECT DRIVE COOLING RELAY NOT USED ON ALL DIRECT DRIVE MODELS BLACK LEAD FROM RELAY TO 822 REPLACES BLACK 822 WIRE SHOWN ORANGE aed TO BLACK 115V LIN2. Furnace TABLE Hl BELT DRIVE BLOWERS Cooling Pulley CFM P Setting 0 40 860 Heating Lo Approx A C Capacity se ve sro 73 F oro sos 86 om 0 oro A E 06 oro 1200 i065 368 oro 950 815 30 F Sei iss 6 3 amp TO 100 sF oro 95 80 95M Usc i 4 aro 1075 ater oro ns 80 39M lg 394U ELECTRICAL CONNECTIONS Al electrical connections are to be made in accord ance with the local codes governing such wiring permanent live separately fused electric power supply complete with manual Switch should be provided for the furnace The room thermostat should be located where it will be in the natural circulating path of room air Avoid locations where the thermostat would be exposed to cold air infiltration drafts from windows doors or Other openings leading to the outside or exposure to air currents from warm or cold air registers or to exposure where the natural circulation of the air is cut off such as behind doors above or below man tels shelves etc 5 The thermostat should not be exposed to heat from nearby radiators fireplaces radios televisions lamps or rays from the sun Nor should the thermo stat be mounted on a wall containing pipes or warm air ducts or a flue or vent which could affect its Operation and prevent
3. 394 Series A 39394D1 12 20 65 FILTERS When the furnace air distribution system is used for cooling it is recommended in certain instances that the throw away filters be discarded and the perma nent type multi velocity filters be substituted The following table gives the air flows above which these high velocity filters should be used Throw away Filters Permanent Filters xia Air Flow cfm Air Flow cfm 50 1000 80 1000 1785 100 1000 1785 125 1420 2020 Permanent filters are not required on Size 50 J FURNACE OPTIONAL SIM SIDE FILTER RACK RETURN OPENING EITHER SIDE ELTE id II n 1a e e els 100 394 46 26 184 16 20 44 5 144 22 12 14 23 I4 2 3 33 RATINGS BTU HR GAS CONNECTION APPROX MODEL Bonnet SIZES BOTTOM FILTER SIDE FILTER SHIPPING NO Input Capacity Nat Mid T WEIGHT 50 394 50 000 40 000 4 4 5 14x25x1 14x25x1 135 80 394 80 000 64 000 14x25x1 14 x25x1 100 394 100 000 80 000 4 X4 X 16x25 x1 16 x 25x1 00 3 z 125 394 125 000 100 000 20x 0531 20225 1 150 894 150 000 120000 4 14x25x1 Q16x25x1 4 355 1 16 25 1 250 394 250 000 200 000 2 D 220
4. mu The Bryant Model 394 forced air gas fired furnace may be installed as an 1 Upflow Furnace 2 Counter Fiow Furnace 3 Basement Furnace This instruction contains complete procedures for installing the unit as an Upflow Furnace When the furnace is used as a counter flow a counter flow box and instructions are available When it is used as a basement model a drop duct and instructions are available Series C and D 393 Counterflow boxes are not interchangeable with the 304 Counterflow boxes Before beginning installation read these instruc tions carefully When making a Counter Flow or Basement installa tion also read the separate instructions furnished with the additional equipment required Install the furnace in accordance with the require ments of the local utility or authority having juris diction The installer is referred to the American Standard Installation of Gas Appliances and Gas Piping ASA Z21 30 1964 as a sound and practical guide to be followed when making the installation INSPECTION Check the power supply available to be sure it agrees with the information on the wiring diagram and the blower motor in the furnace Check the gas specification on the A G A rating plate to be sure that the type of gas for which the unit is equipped is the same as the gas supply available Leave these instructions near the furnace Installation Instructions GAS FIRED FORCED AIR FURNACE _
5. If the valve is not equipped with the adjusting screw adjustment of the flame is effected by alter ingthe position of the valve handle 39 41 WM Light Main Burners using the procedure contained on the metal Lighting Instruction Plate to the front of the furnace E Adi just Gas Rate Set the room thermostat on call for heat and adjust the gas rate There will be approx imately 30 seconds delay before the valve opens l City Gases Measure gas input at the meter The burners are equipped with fixed Orifices sized to produce the rated input shown on the rating plate measured and rated input are not approximately the same the gas piense regulator may be ad justed as follows a To increase input Turn gas pressure regulator adjusting screw clockwise Adjusting screw is concealed under the regulator sealing cap b To decrease input Turn the adjusting Screw counter clockwise The manifold pressure should be set as follows Natural Gas 3 inches w c Maximum pressure departure from recommended pres sure should be plus or minus 0 3 inches w c 2 Propane Gas These units are not equipped with gas pressure regulators Burner orifices are sized to give the rated input at a manifold pressure of 11 inches w c Since meters are not normally used with propane gas it will be necessary in most cases to check the manifold pressure and adjust the regu lator at the supply tank
6. WIRING LINE VOLTAGE WIRING G SPLICE CAPACITOR ON PSC DIRECT DR MOTORS ONLY NOTE IF THE ORIGINAL WIRES ARE REPLACED THE TYPE OF WIRING MATERIAL MUST BE USED YELLOW Figure 13 Counterflow Wiring 394U 16 PILOT OR 100 SHUT OFF PILOTSTAT VALVE i H gt Flos YELLOW ORANGE ORANGE f aa p EO PILOT A GREEN ON 100 SHUTOFF ONLY g PILOTSTAT MODEL 5 _ SPLICED ONPILOT ONLY WHERE AIR CONDITIONERS GREEN WITHOUT TRANSFORMERS ARE USED A JUMPER BETWEEN X amp G2 IS USED EE waite J Bee V MS A varh J 822 wee N AR GREEN rae A BLUE E NOTE IF THE ORIGINAL WIRES ARE REPLACED THE SAME TYPE OF WIRING MATERIAL MUST BE USED LOW VOLTAGE WIRING LINE VOLTAGE WIRING 9 SPLICE Figure lH Belt Drive Wiring Diagram 17 TRANSFORMER P 115 V 394U mm WHERE AIR ONDITIONERS GREEN WITHOUT TRANSFORMERS ARE USED A JUMPER BETWEEN X amp G2 IS USED TO TERMINALS GREEN DIRECT DRIVE DRIVE MODELS LINE SPLICE 115 V DIRECT DRIVE MOTOR 3 ERMINAL DIRECT DRIVE J BOX TERMINALS INDICATED so 80 YELLOW 100 CAPACITOR ON PSC DIRECT DR MOTORS ONLY NOTE IF THEORIGINAL WIRES ARE REPLACED THE SAME TYPE OF WIRING MATERIAL MUST BE USED LOW VOLTAG
7. fully open position the air delivery rate is at a minimum and conse quently the temperature rise across the furnace 15 at the maximum When the pulley is in the fully closed position the air delivery rate 15 maximum and consequently the temperature rise across the furnace is ata ininimum In order to change the opening on the pulley simply loosen the set screw with an Allen wrench Screw the pulley clockwise to close and counter clockwise open Once positioned tighten the set screw on the flat of the motor shaft O L Furnaces DIRECT DRIVE BLOWERS HEATING ONLY Furnace Motor Factory CFM Temp Size H P Setting 9 0 12 Rise Ext S P Temp Rise Factory a t CFM at Inches Water Degrees F Setting o 85 F Temp Rise 70 100 70 100 70 100 70 100 ed Low TABLE AE E amp M Furnaces p HEATING AND COOLING BLOWERS All M Furnaces set on Hi speed Temp Rise Degrees F Cooling Air Flow CFM Es Motor Speed Taps sd a Motor Speeds Shown Hr Hed Medie Ls Hr Med Wed Lo Lo Tana laa daa 7080 0 40 760 650 S60 480 3 dna 70 80 80 90 dna 0 40 780 680 590 dna due 93 55 70 a i epe dna does not apply dna does not apply below 125 volts values shown are for 120 volt power supply
8. installer consult the American Standards Installation of Gas Ap _pliances and Gas Piping ASA Z21 30 1964 9 In restricted Spaces it is very important that the return air ducts be sealed firmly into the furnace so that the return air will be kept separate from the combustion and ventilating air 3940 GAS PIPING The gas supply line should be a separate line direct from the meter to the furnace Check local utility for recommendations concerning existing lines Choose a supply pipe size large enough to keep the pres sure loss as low as practicable The supply pipe should never be smaller than the inlet to the gas valve For pipe capacities at 0 3 inches w c pres sure drop see Iron Pipe Capacity table below Observe local codes for all gas pipe installation The following are pertinent recommendations 1 Avoid low spots in long runs of pipe These low spots may trap water in the supply line It is best to slope all pipe 1 4 inch in 15 feet to prevent traps All horizontal runs should slope to risers Risers should be used to connect to the furnace and to the meter 2 Install a drip leg in the riser leading to the furnace This drip leg will serve as a trap for dirt or condensate This drip leg can be installed by connecting a TEE to the riser leading to the furnace so that the straight through section of the TEE is vertical Then connect a capped nipple to this
9. to provide a pressure of 1 inches w c 3 If the input in item 1 or 2 above is too great or too little install new orifices Be sure the rated input is obtained without any in manifold gas poem LA M Adiust Main Bond Plame M The main ac flame Should be clear blue almost transparent with a well defined inner cone If there is insufficient primary air the flame will be yellow tipped If there is too p much primary air the flame will be well defined but with a tendency to dance or lift off the burner ports Allow furnace to operate 15 minutes 2 Adjust each burner by closing the air shutter until a slight yellow tip appears on the flame then open the air shutter just enough to clear the yellow from the flame I1 CHECK CONTROLS Bryant Diaphragm Gas Control Valve if not already checked when lighting the main burner check the proper operation of this valve by moving the room thermostat pointer above and below room temperature and observe that the main burners light on call for heat and go off when the pointer is moved below the room temperature setting Remember there will be approximately a 30 second delay on ignition and extinction Automatic Pilot To check the pilot operation follow the instructions below I Set the room thermostat on call for heat There is a delay before burners light 2 After burners have lit close the pilot gas valve 3 T
10. valve and the supply line be allowed to purge until the odor of gas is detected Never purge gas lines into the combustion chamber Immediately upon detection of gas odor re connect the pilot supply tube Allow 5 minutes to elapse and light the pilot in accordance with the instructions on the front of the furnace 2 The pilot flame should be soft blue in color a For natural gas controls D4 this flame should be of sufficient length to provide good impingement on the mono metal element of the Bryant pilot Flame should extend upward between the carry over ports of the two adjacent burners b For propane gas controls D2 the flame should surround the tip of the thermocouple element of the pilot and extend downward to include 3 8 inch to 1 2 inch of the thermocouple The flame must never come in contact with any other part of the thermocouple or its lead wire The flame lies under the carry over ports of the burners and merges with the carry over flames D5 controls have the same pilot and should have the same flame as D2 controls 3 If the pilot flame does not have the appearance described above it may be adjusted by means of the manual pilot shut off valve a If the valve is equipped with an adjustable screw turn the handle to the full open position and remove the screw cap on the valve handle thus exposing the adjustable screw Turn adjusting screw until flame has the desired Replace Screw cap b
11. E SPLICE 115 V DIRECT DRIVE MOTOR 3 16 DIRECT DRIVE J BOX TERMINAL BLOWER MOTOR WIRING CHART RED WIRE ATTACHEDTO TERMINALS INDICATED ISIZE UNIT TYPE OF BLOWER 50 RED 80 YELLOW RED FRED 125 CAPACITOR ON PSC DIRECT DR MOTORS ONLY NOTE IF THE ORIGINAL WIRES ARE REPLACED THE SAME TYPE OF WIRING MATERIAL MUST BE USED 100 BLUE 125 LOW VOLTAGE WIRING LINE VOLTAGE WIRING See e SPLICE Figure 12 Standard D4 or D5 Wiring Diagram 15 394U PILOT 100 SHUT OFF PILOTSTAT VALVE COUNTERFLOW LIMIT k gt HE uio YELLOW ORANGE RANG raz 2 ORANGE ro PILOT X GREEN ON 10096 SHUTOFF 54 ONLOGNPILOTSTATMODELS5 WHITE WHERE AIR CONDITIONERS WITHOUT TRANSFORMERS ARE USED A JUMPER BETWEEN X amp G2 IS USED TRANSFORMER TERMINALS me DIRECT DRIVE p COOLING RELAY e T NOT USED ON ALL DIRECT DRIVE MODELS BLACK LEAD FROM RELAY TO 822 REPLACES BLACK 822 WIRE SHOWN USE SLEEVE CONNECTOR DOWNFLOW TO BLACK 115 V LINE SPLICE DIRECT 115 V DRIVE MOTOR 3 TERMINAL DIRECT DRIVE J BOX BLOWER MOTOR WIRING CHART RED WIRE ATTACHEDTO TERMINALS INDICATED SIZE UNIT TYPE OF BLOWER 50 RED 80 YELLOW 100 LOW VOLTAGE
12. E WIRING LINE VOLTAGE WIRING e SPLICE Figure 15 Propane Wiring Diagram 394U 18 TRANSFORMER COOLING RELAY NOT USED ONALL DIRECT TO BLACK 115 V BLACK LEAD FROM RELAY TO 822 REPLACES BLACK 822 WIRE SHOWN
13. TEE The capped nipple should extend below the level of the gas controls with the cap resting on the floor 3 Install the main manual gas shut off valve in the supply line five feet above the floor Install the valve supplied so that the pilot manual cock is on the inlet side of the valve MAIN MANUAL SHUT OFF 5 FEET ABOVE FLOOR Figure 5 Gas Piping Figure 6 Lenath of Pi wipe ES in Cubic Feet Per Hour Multiplier to Use Eb x ud for ee Shown for Different Specific Gravit uii a wei tr 1 All values shown are based on a pressure drop of 0 a w c and using gas with a specific gravity value of 0 60 Consult local utility for local variations 2 To convert to capacities for gas of different specific gravity multiply the capacity values by the multi pliers shown at the extreme right on table 394U ATN Sizes 50 80 100 amp 125 using natural gas are equip ped with a factory installed combination pressure regulator and main shut off pilot supply shut off valve This control is inside the furnace cabinet A separate manual shut off valve is not supplied with these furnaces Consult local codes regarding the need for placing a separate shut off valve out side the furnace cabinet as shown in Figure os Where a gum filter is required by local regulations place filter between manual gas cock and pilot cock See Figure 6 Place a ground joint union between the gos control manifold a
14. ctional areas of the additional flue pipes being connected 9 If more than one appliance is manifolded into the same flue connecting pipe the cross sectional area of this manifold pipe must be as large as the sum of the cross sectional areas of the pipes con necting into it 394U lt SPEUREN i Direct Drive Listed below are the color codes for the different motor speed taps 23 32 High Speed Black ab Medium Speed Blue Medium low Speed Yellow Low Speed Red To change motor speed taps remove the blower door and blower contr l box cover then remove the motor tap and relocate it on the desired terminal importit If there are variations in voltage at dh motor there will be significant variations in the air de livery and temperature rise values If the supplied voltage is less than 120 volts the blower will run slower and the temperature rise will be greater On the other hand if the voltage is greater than 120 volts the blower will run faster and the temperature rise values will be lower If there is doubt about the value and fluctuation of voltage consult local electric utility The Number 3 tap should be used on installations where the voltage is 125 volts or higher 3940 Belt Drive The motors supplied with the belt drive have an adjustable motor pulley The air delivery rate is controlled by the position of this adjustable motor pulley When the pulley i is in the
15. d when they become dirty Permanent type of filters may be cleaned using clear water Be sure to coat the filter with water soluble oil after clean ing Cleaning The heat exchanger should be examined periodically to see if there has been an accumula tion of rust soot etc Clean as required Figure 9 Remove baffles Ja aed STD 394 394H 115 v TWINNING MOTOR SIZES UP TO 1 3 HP FURNACE NO 1 822 FAN RELAYS WITH FURNACES FURNACE TO FURNACE TRANSFORMER TRANSFORMER T STAT HEAT zt ANTICIPATOR SET X FOR AMP DRAWC CONTROL RELAY SIDE VIEW STD 394 394H 230V TWINNING MOTOR SIZES UP Z 4 H P FURNACE NO 1 822 FAN RELAYS WITH FURNACES TO FURNACE TO FURNACE TRANSFORMER TRANSFORMER FURNACE LOW SPACE SIZE 250 TWO 12519 4 APART TO PROVIDE SPACE FOR GAS PIPING SPACE 300 TWO 7250 s 1 APART TO PERMIT EXPANSION AND CONTRACTION FRONT VIEW SIZE Free CAP PIPE em PIE jx p iik Iw DCS 5 Figure 10 Venting rrangement for Multiple Units 13 3940 SECONDARY LIMIT PILOT OR 100 a SHUT OFF PILOTSTAT VALVE L2 gt mE plow ORANGE ORANGE eS ives w r PILOT W GREEN ON100 SHUTOFF 9 ES R i al a o spucEpoNPiLor 9 ONLY rt WHERE AIR CONDITIONERS GREEN WITHOUT TRANSFORMERS ARE USED i A JUMPER BETWEEN X amp G2 IS USED
16. e run edis 3 Run pipe as directly as possible with a minimum number of turns The maximum length of horizontal run should not exceed 75 percent of the height of the chimney 4 Maintain a minimum of 1 4 inch per linear foot upward slope from the furnace to the chimney on all horizontal runs b 3 5 Rigidly support the flue pipe with hangers and Straps to insure that there will be no movement after installation E 6 Extend the flue connection pipe through the chimney wall flush with the inner face of the chim ney liner Never connect into a chimney serving an open fireplace unless the fireplace opemng is sealed off 7 The chimney or gas vent should extend high enough above the roof or neighboring obstruction so that wind from any direction will not create a positive pressure in the vicinity of the outlet of the chimney or gas vent The installer is referred to Part V of American Standard Installation of Gas Appliances and Gas Piping ASA Z21 30 1964 for detailed information on chimney and gas vent use In general the chimney or gas vent should extend 3 feet higher than the point of emergence through the roof and at least 2 feet higher than any object within a radius of 15 feet 8 If more than one appliance is vented into the same chimney the cross sectional area of the chim ney must be as large as the largest flue pipe being connected plus 50 percent of the cross se
17. he automatic pilot will break the electrical circuit to the gas valve and the burners will shut off There is a delay before burners shut off Limit Control This control functions to shut off the gas if the furnace becomes over heated The method of checking satisfactory operation is left to the discretion of the installer Extreme caution should always be employed ME Blower Adjustmerit lt is that the blower speed be adjusted before there is any to adjust the fan control switch The blower speed is set at the factory Under no circumstances should the temperature rise across the furnace be allowed to exceed 105 degrees F After the desired air flow or temperature rise across the furnace has been obtained the AMOR Should be complete Bryant has introduced a new concept in n controls in the 394 furnace The 394 incorporates the tried and proven 822 Relay for fan control The 822 has a field adjustable dif ferential The max off setting on the dial is for the longest off time and shortest on time 394U 394U CLEANING THE FURNACE 1 Disconnect pilot tubing at the tube union 2 Disconnect electrical lead from pilot In case of 10075 shut off controls disconnect pilot thermo couple lead from pilot relay or gas line pilotstat 3 Remove front plate from draft diverter 4 sheet metal screws 7 4 Remove burners and pilot as fol
18. it from properly controlling the room temperature Any hole in the plaster or panel through which the wires pass from the thermo stat should be adequately sealed with suitable material to prevent drafts from affecting the thermo stat The heat anticipator of the thermostat should be set 8 amps INSTALLING THE UNIT Sizes 50 80 100 amp 125 for natural gas are com pletely assembled at the factory with the exception of the pilot gas filter which is shipped loose see Figure 6 The order to be followed in setting the unit in place and making all the necessary connections gas electric venting duct work etc is left to the discretion of the installer lowed When making the gas piping installation as For furnaces with D2 or D5 controls the pilot feed tube is connected to the pilot relay or the in line 100 shut off valve START UP AND ADJUSTMENT Check to be sure that all connections have been properly made then proceed as fellows Light the pilot using the procedure outlined on the Lighting Instruction Plate attached to the furnace However when lighting the pilot for the first time perform the following additional steps l If the supply line was not purged prior to con necting the furnace it will be full of air Since it would take a long time to vent this air through the small pilot port it is recommended that the pilot supply line be disconnected at the pilot shut off
19. lot Gas Filter 100 Shut Off T C Plot Pilot Relay Inline 100 Shut Off Valve For natural gas only the regulator 15 part of a com bination regulator main gas shut off and pilot shut off As required Figure 1 D4 Controls 641 Valve 732 Pilot 394U Figure 2 Thermocouple Pilot D5 Controls This pilot also on D2 Controls em Figure 4 Slotted Port Burner Natural gas only Figure 4a Controlled Flame Burner Propane gas only LOCATING THE UNIT 1 This gas furnace is approved for use on combus tible floors except when installed as a counter flow furnace When installed as a counter flow furnace on a combustible floor it must be installed on an approved base 2 The furnace is A G A er for the following clearances from combustible construction in a clos et or alcove installation Sides Q 1 Back 0 1 t Top of plenum 3 0 Vent connector 6 6 Front 6 6 Figures shown in parentheses are approved clear ances when the furnace is installed as a counter flow furnace t Refer to ASA Z21 30 1964 for clearances in open area installations 3 Locate the furnace as close to the chimney as possible The furnace should also be located as centrally as possible to the distribution system 4 Provide ample space for servicing and cleaning Consult your local approval agency or gas company for a
20. lows a Remove tinnerman clamp from burner holding stud b Slide burner off the orifice and remove under the manifold c Pilot is attached to one burner and is removed with that burner It is not necessary to detach pilot before removing burner See Figure 3 for photograph of burner also pilot attached 5 Remove metal angle strip holding flue baffles in place See Figure 8 6 Remove flue baffles See Figure 9 7 Use a flexible handled steel cleaning brush to loosen scale and soot Remove these scrapings from bottom of combustion chamber 8 Re assemble furnace by reversing the above pro cedure Note There is a slot in the back of the heat exchanger for the back tip of the burner to fit into When properly placed the burner will fit into this slot and will be level Figure 8 Note metal angle strip held by 3 screws 12 CARE AND MAINTENANCE Care of Blowers All motors on the belt die Blows ers are provided with oil cups and should be oiled at least twice a year with a good grade of SAE 30 oil The motors on the direct drive blowers are sealed units and do not require the addition of oil Blower bearings are semi permanently lubricated This lubrication is normally good for 3 to 5 years When necessary to add lubricant use Plastic E obtainable from Bryant s Service Parts Department Filters Filters should be examined frequently for Clogging due to dirt The disposable filters should be replace
21. nd the manual gas shut off valve 4 Support all piping with appropriate straps hang ers etc This will mairitain proper slope of the lines as installed and will remove unnecessary strain on the furnace and its controls It will also prevent the piping from being moved accidentally from its installed position 5 Joint compounds pipe dope should be applied sparingly and only to the male threads of the joints Consult local supplier for type of compound to be used with propane gas as the pipe dope must be resistant to the action of this gas 6 After all connections have been made purge the lines and check for leakage Never purge a line into a combustion chamber candles flame or other sources of ignition for the purpose of checking leakage Never use matches VENTING THE FURNACE Consult local codes Unless the local codes direct otherwise the furnace may be vented to a permanent chimney or to a listed Type B or Type C gas vent This Bryant gas fired furnace has a built in draft diverter Therefore it remains only to connect the furnace vent collar to the chimney or gas vent to be used The following recommendations are made 1 Select a flue connection material that is satis factory for the installation and that meets the requirements of the local codes 2 The flue connection pipe must be the same size as the outlet collar on the furnace No reduction in this size is permissible in the pip
22. ny special clearance requirements 5 The furnace should be level Use shims as required 1f the floor or foundation i is not completely level 6 Advise owner to leave all air passageways to the furnace free of obstruction in order that there will be no interference with combustion and venti lating air 7 The furnace is designed for use with summer air conditioning Therefore consideration should be given to leaving ample space for a later installation of air conditioning equipment if the air conditioning equipment is not being installed as part of the orig inal furnace installation Bryant manufactures a coil box for upflow furnaces If air conditioning will be added at a later date the coil box if installed on the original installation will save time and money later A coil box is not needed for counter flow furnaces This gas furnace is not approved for use with air conditioning units mounted upstream from the fur nace heat exchanger The cooling coil should either be downstream of the furnace heat exchanger or the flow of cooling air should be by passed around the heat exchanger If this parallel arrangement is used dampers or other means used to control the flow of air must be adequate to prevent chilled air from entering the furnace If these dampers are manually operated they must be equipped with means to pre vent operation of either unit unless the damper is in the full heat or full cool
23. position 8 In general when the furnace is in a large open space there will be enough air for com bustion and ventilation However when the unit is installed in buildings of unusually air tight con struction or when the furnace is located in very restricted spaces such as closets or utility rooms special provisions must be made for combustion ventilating and draft hood dilution air l When the unit is installed in a confined space pro vide the confined space with two permanent open ings one near the top of the enclosure and one near the bottom These openings must freely communicate with interior areas that have adequate infiltration air from the outside Each opening must have a free area of not less than one square inch for each 1000 Btu hr of rated input of all appliances located within the enclosure Each PCIE must have at least 100 square inches free area 3t isonet practicable to connect the two openings to interior space or if the interior space has in sufficient infiltration air then it is necessary to connect the openings to the outside If air openings are directly to outdoors the minimum free area should be one square inch per 3000 Btu hr of input rating or in accordance with Z21 30 1964 or latest edition American Standards for Installation of Gas Appliances and Gas Piping Each opening must have at least 100 square inches free area It 1s strongly recommended that the
24. x25x1 2 20 x 25 x1 The size 250 is two sizes 125 BEEN For LP Gas Model Designation 80 V 394 A G A Input 75 000 Bonnet Capacity 60 000 200 394 200 000 160 000 2 34 039MU COUNTERFLOW FURNACE B UNES C CRI LE Sc MD cc E G hs H M j 7 AIR OUTLET T AIR OUTLET Gas Connection A G A Ratings Model Btu Hr N J Bonnet A Sizes Input Capacity 100 394 100 000 80 000 7526 18416413 5 144224 4s aan 210x20x1 210 Add 14 when installed with base on combustible floor E For LP Gas Model Designation 80 V 394 A G A Input 75 000 Bonnet Capacity 60 000 do iE FILTER ACCESS DOOR BASEMENT pes FURNACE A G A Ratings Btu Hr Gas Connection J Bonnet Sizes Capacity Wid Prop 80 394 80 000 64 000 46 407 16 14 20 22 2 4 33 34 amp 4x25xi 192 18 20 2413 s 3 s4 X poxosxi 238 Ratings are approved for altitudes to 2 000 geet for all gases Ratings for altitudes over 2 000 feet are 475 less for each 1 000 feet above sea level mE For LP Gas Model Designation 80 V 394 A G A Input 85 000 Bonnet Capacity 60 000 E 8940 GAS CONTROL OPTIONS Gas and Control Type Components Bryant Automatic Pilot Bryant Gas Control Valve Gas Pressure Regulator Transformer Pi
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