Smith Cast Iron Boilers GB200 SERIES User's Manual
Contents
1. and 400 Series or M amp M PS804 LWCO 400 Series or M amp M PS804 LWCO OPERATING SEQUENCE OPERATING SEQUENCE FOR SREAM BOILERS STEAM BOILERS EQUIPPED WITH VENT DAMPER EQUIPPED WITH STANDING PILOT VENT DAMPER CG 400 SERIES LWCO AND IID HI LIMIT amp CG 400 SERIES LWCO 1 MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND 1 MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND REMAINS CLOSED DURING STANDBY REMAINS CLOSED DURING STANDBY 2 SENSING CIRCUIT 15 CONTINUOUSLY MONITORED 2 STANDING PILOT REMAINS LIT 5 THERMOSTAT OR OPERATING CONTROL CALLS FOR HEAT CONTINUOUSLY MONITORED 4 DAMPER BLADE OPENS 4 THERMOSTAT OR OPERATING CONTROL CALLS FOR HEAT DAMPER END SWITCH CLOSES PROVING DAMPER OPEN 6 IF NO FAILURE EXISTS THE PILOT VALVE AND IGNITER 5 DAMPER BLADE OPENS ARE ENERGIZED 6 DAMPER END SWITCH CLOSES PROVING DAMPER OPEN 7 PILOT IS IGNITED AND SENSOR SENSES FLAME ST MEINAVAPUE TIER ENE COIZED 8 MAIN VALVE IS ENERGIZED AND IGNITER DE ENERGIZED 9 UNIT OPERATES UNTIL THERMOSTAT GR OPERATING B UNIT OPERATES THERMOSTAT QR OPERATING CONTROL IS SATISFIED CONTROL 15 SATISFIED 10 SYSTEM RETURNS TO STANDBY WITH DAMPER CLOSED 9 SYSTEM RETURNS TO STANDBY WITH DAMPER CLOSED FIELD WIRING FI2. MAXIMUM LH 6 FT PART j SINGLE WA TYPE B N FLUE PIPE 2 J PITCH UP 1 4 PER FOOT SECURE FLUE PIPE TO VENT DAMPER ott INSTALL FLUSH WITH CHIMNEY LINER SEAL WITH FURNACE CEMENT TIT FIGURE 2 7 GAS PIPE SIZING TABLES amp EXAMPLE Maximum Capacity of Pipe in Cubic Feet of Natural Gas per Hour for Gas Pressures of 0 5 Psig or Less and a Pressure Drop of 0 3 Inch Water Column Based on a 0 60 Specific Gravity Gas Nominal Iron Pipe Internal Length of Pipe Feet Size Diameter Inches Inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200 1 4 326 32 22 18 15 14 3 8 493 72 49 40 34 30 1 2 622 132 92 73 63 56 3 4 824 278 190 152 130 115 1 1 049 520 350 285 245 215 1 1 4 1 380 1 050 730 590 500 440 1 1 2 1 610 1 600 1 100 890 760 670 2 2 067 3 050 2 100 1 650 1 450 1 270 1 2 1 2 2 469 4 800 3 300 2 700 2 300 2 000 1 12 11 11 10 9 8 8 7 6 27 25 23 22 21 18 17 15 14 50 46 43 40 38 34 31 28 26 105 96 90 84 79 72 64 59 55 195 180 170 160 150 130 120 110 100 400 370 350 320 305 27
3. WESTCAST INC Smith CAST IRON BOILERS 260 NORTH ELM STREET WESTFIELD MA 01085 TEL 413 562 9631 FAX 413 562 3799 www smithboiler com SECTION 1 INTRODUCTION The following terms are used throughout this manual to bring attention to the presence of potential hazards or to important information concerning the product DANGER Indicates an imminently hazardous situa tion which if not avoided will result in death serious injury or substantial property damage WARNING Indicates a potentially hazardous situa tion which if not avoided could result in death seri ous injury or substantial property damage CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor injury or prop erty damage NOTE Used to notify of special instructions on installa tion operation or maintenance which are important to equipment but not related to personal injury hazards CODE COMPLIANCE Boiler installations must conform to the requirements of the authority having jurisdiction or in the absence of such requirements to the National Fuel Gas Code ANSI Z223 1 latest edition Where required by the authority having jurisdic tion the installation must also conform to the American Soci ety of Mechanical Engineers Code for Controls and Safety Devices for Automatically Fired Boilers ANSI ASME CSD 1 All electrical wiring must be in accordance with National Electric Code ANSI NFPA No 70 late
4. f the pilot will not stay lit after several tries turn the gas control knob to OFF and call your service tech nician or gas supplier 11 Replace pilot access panel 12 Turn gas control knob counterclockwise to ON 13 Replace control access panel if applicable 14 Turn on all electric power to the appliance CONTINUOUS PILOT HONEYWELL VR8200 GAS CONTROL KNOB SHOWN IN OFF POSITION RESET BUTTON OPERATING INSTRUCTIONS Intermittent Pilot Honeywell VR8204 Natural or Propane Gas STOP Read the safety information on page 13 Set the thermostat to lowest setting Turn off all electric power to the appliance This appliance is equipped with an ignition device which automatically lights the pilot Do not try to light the pilot by hand Remove control access panel if applicable Rotate gas control knob clockwise to OFF Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you then smell gas STOP Follow A on page 13 If you don t smell gas go to next step Turn gas control knob counterclockwise to ON Replace control access panel if applicable Turn on all electric power to the appliance Set thermostat to desired setting If the appliance will not operate follow the instructions To Turn Off Appliance and call your service technician or gas supplier TQ Noo INTERMITTENT PILOT HONEYWELL VR8204 GAS
5. GB200 5 1 Nat Gas 41 41 7 38 Drill Size 3 2 Prop Gas Drill Size 39 52 i 4 orifices are screwed into the manifold and may be removed by using a 5 8 wrench or socket 5 Reverse procedures above to install orifices and burners Be sure to reinstall burners with burner ports on the top surface upright HEATING SYSTEM PROBLEMS amp CAUSES No Heat Insufficient Heat 1 Blown fuse or circuit breaker 4 Incorrect thermostat 2 Switch turned off anticipator setting 3 Pilot outage 2 Low pressuretol setting 4 IID system malfunction 3 Boiler undersized or 5 Flue damper not open underfired 6 Water level too low 4 Insufficient radiation Odor Excessive Yellow Flame Moisture In Building Carbon Build Up 1 Leak in piping 1 Unit overfired 2 Carbon build up flueways 2 Air shutter misadjust 3 Blocked chimney ment 3 Wrong orifices Noise 4 Burning in burner mix 1 Ignition or ignition noise ing tube due to incorrect air shutter adjustment Overheating 2 Whistle due to burr on 1 Wrong thermostat orifices anticipator setting 3 Burner fluteings due to air 2 Bad thermostat shutter opening too wide location 3 Bad thermostat CAUTION Label all wires prior to disconnection when servicing controls Wiring errors can cause improper dangerous operation Verify proper operation after servicing GB200 Series ORDERING INFORMATION
6. MY AENT 2 WHT CT e pure MV PV DAMPER BLK TH MV of BLUE UNES d VHT 285 u ROLLOUT VENT 2 ew SWITCH DAMPER 3e RED is E 4 BEVE IGNITER otk yege SPARK 74 SENSOR GAS VALVE F ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE BOILER L MUST REPLACED USE A SIMILAR WIRE OF 105 RATING IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED IT MUST BE REPLACED WITH TYPE MTW 105 H N WIRE OR ITS EQUIVALENT 115 V AC 15 115 24 YYYYA CER 115 24 SWITCH MANUAL RESET Y XE Y SPILL SWITCH TS TALIS cay N e e LL 1 TES 1 as CONTROL SWITCH Lweo 1S TAT Ewen PRESSURE CNTRL T T o uut CUNTRUL d DPER CNTRL a GAS VALVE S 8600 e zi vENT 1 wv el udo a 3e lt TR gt 5 8 Te Eie d n 4 TH TR PV 1 GND pawPes A TH TR L FAN z 24 GND 49 us j 24V IGNITER SWITCH GAS VALVE SENSOR SPARK SPILL AND ROLLOUT SWITCHES USED WHEN SPILL AND ROLLOUT SWITCHES USED WHEN INPUT INPUT IS LESS THAN 300 000 BTUH IS LESS THAN 300 000 BTUH mem 42 5736 REV2 FIGURE 2 10 Wiring Diagram amp Operation Sequence for FIGURE 2 11 Wiring Diagram Operation Sequence for Boilers Equipped with Intermittent Pilot Vent Damper Boilers Equipped with Standing Pilot Vent Damper and
7. Moving down the column match required capacity Higher capacity is acceptable In our case it is 152 cu ft 3 Move to left hand column Nominal Iron Pipe Size Inches to read required pipe size In our case it is 3 4 Testing Gas Piping DANGER Before placing gas piping into service carefully test it to assure every joint is gas tight Bub ble test all joints with a soap solution NEVER TEST WITH AN OPEN FLAME AS FIRE OR EXPLOSION WILL RESULT For any pressure testing in excess of 1 2 psi the boiler and its individual shutoff valve must be isolated from the piping system by disconnecting them and capping the outlet s For any pressure testing equal to or less than 1 2 psi the boiler must be isolated from the piping system by closing its manu al shutoff valve Minimum pressure required at the gas valve inlet is 5 W C for natural gas and 11 W C for propane Maximum pressure allowable at the gas valve inlet is 12 W C If the gas pres sure is above these limits a pressure regulator must be installed If the gas pressure is below these limits contact the local utility STEP 6 WIRING BOILER For vent damper equipped models connect thermostat to blue leads see Figures 2 4 amp 2 4A WARNING Turn off electrical power supply before servicing Contact with live electric components can NOTE If any of original wire supplied with boiler must be replaced use similar wire of 105 rating Other wise insulati
8. When ordering parts provide model and serial number shown on unit rating plate as well REPLACEMENT PARTS LIST as number and name as shown in parts list Parts may be obtained from your local Smith heating contractor MODEL GB200 SERIES REPLACEMENT PARTS LIST REF NO NAME OF PART PART NO GB200 3 GB200 4L GB200 4H GB200 5 1 Jacket Complete 59248 1 Jacket Complete 59249 1 1 Jacket Complete 59250 1 2 Burner N G L P 59089 3 Burner w Pilot Bracket N G L P 59091 1 1 1 1 4 Base Door Ass y 59092 1 Base Door Ass y 59093 1 1 Base Door Ass y 59094 1 6 Base Pan 59056 1 Base Pan 59057 1 1 Base Pan 59058 1 8 Manifold 59119 1 Manifold 59120 1 1 Manifold 59121 1 10 Burner Orifice 37 N G 59145 4 Burner Orifice 38 N G 59146 5 Burner Orifice 41 N G 59147 3 4 Burner Orifice 52 L P 59150 4 5 Burner Orifice 53 L P 59151 3 4 11 Section Rear 3672 1 1 1 1 12 Section Intermediate 3671 1 2 2 13 Section Front No Coil Opening 3670 1 1 1 14 Heat Exchanger Assembled Block 72400 1 Heat Exchanger Assembled Block 72401 1 1 Heat Exchanger Assembled Block 72402 1 15 Port Seal 5 60306 2 3 3 4 16 Seal 2 59168 2 3 3 4 17 Pipe Plug 2 Sq Hd 61547 1 1 1 1 20 Flue Baffle 59185 2 3 3 4 21 Low Water Cut Off CG400 50090 1 1 1 1 22 _ Pigtail 1 4 CG400 61684 1 1 1 1 2
9. con necting draft diverter to chimney or vent for obstructions soot accumulation rust or corrosion Clean and replace as necessary Check tightness of joints seal all joints where necessary 2 Check boiler flue passageways in the boiler sections for any blockage or soot accumulation Remove jacket top and draft diverter Using a flashlight examine all flue passage ways a If passageways are free of soot and obstructions replace draft diverter and seal with furnace cement If passageways need cleaning remove flueway baffles and burners as described in paragraph 3 below Insert long handle bristle flue brush down between section tubes and upward through sections from combustion chamber in both diagonal directions to remove carbon from finned surfaces Vacuum debris Replace the draft diverter and seal with furnace cement Reinstall jacket top panel b C 3 Check and clean burner assembly Remove burner access panel Lift burners up and to rear until burners are disen gaged from orifices Brush top of burners with soft bristle brush and blow out with air or vacuum 4 Check gas manifold for proper position and reassemble burners to the manifold Line up holes in burners with the ori fices and slide assembly back into position Be sure to rein stall burners with burner ports on the top surface upright 5 When a low water cut off has been utilized follow the manufacturer s maintenance instructions As a mini
10. CONTROL KNOB SHOWN IN OFF POSITION TURN OFF APPLIANCE 1 Set the thermostat to lowest setting 2 Turn off all electric power to the appliance if service is to be performed 3 Turn gas control knob counterclockwise to OFF Do not force SECTION 4 MAINTENANCE This boiler has been designed to provide years of trouble free performance in normal installations Examination by the homeowner at the beginning of each heating season and in mid heating season should assure continued good perfor mance In addition the boiler should be examined by a quali fied service professional at least once every year DANGER To avoid fire and explosion hazards Do not store anything against the boiler allow dirt debris to accumulate in the area immediately sur rounding the boiler Keep boiler area clear and free from combustible materials gasoline and other flammable vapors and liquids Lint paper or rags must not be allowed to accumulate near the burners Do not place clothing on boiler casing to dry NOTE Do not draw water from heating system for clean ing Minerals in the water can build up on the heat trans fer surfaces and cause overheating and subsequent fail ure of the cast iron sections NOTE To reduce the risk of fouling the low water cut off should be blown down at least once a week during heat ing season 14 BEFORE EACH HEATING SEASON 1 Remove and inspect draft diverter and smoke pipe
11. are in proper position Boiler shall be installed such that the gas ignition system components are protected from water dripping spraying rain etc during appliance operation and service low water cut off repacement condensate trap replacement control replacement NOTE Do not loosen tie rods on boiler absorption unit They are intended to accommodate thermal expansion Loss of boiler s structural integrity and water leaks dam age may result WARNING Never install boiler on carpeting as heat damage and or fire may result MINIMUM CLEARANCES PROBE LOCATION FOR ELECTRIC LWCO BOILER DIMENSIONS MODEL A B TO COMBUSTIBLES GB200 S 3 15 3 8 5 Top 28 GB200 S 4L 18 7 8 6 Rear 18 200 5 4 187 8 6 Left amp Right 18 GB200 S 5 22 3 8 7 Front ALCOVE PRESS B RELIEF VALVE PRESSURE CONTROL _ z qd ROE Eo mw BOCHT ry TT PRESS SPILL SWITCH GAUGE I T 2 STEAM Hd Zr 9 7 g SUPPLY b
12. carbon monoxide Hot gases from appliance venting system pipes or chimney escaping into the living space Flames coming out around the appliance Yellow colored flames in the appliance Stale or smelly air The presence of soot or carbon in or around the appliance Very high unexplained humidity inside the building If any of the symptoms CO poisoning occur or if any of the signs of carbon monoxide are present vacate the premises immediately and contact a qualfied heating service company the gas company or the fire department To reduce the risk of CO poisoning have your heating system tuned up by a licensed heating contractor or the gas company preferably before each heating season Also have the service company check your chimney or vent pipes for blockage Your home should also be adequately ventilated particularly if you have insulated your home Only qualified licensed service contractors should perform work on your Smith Boiler WARNING Install operate and maintain unit in accordance with manufacturer s instructions to avoid exposure to fuel substances or sub stances from incomplete combustion which can cause death or serious illness The State of California has determined that these substances may cause cancer birth defects or other reproductive harm Also install and service this product to avoid exposure to airborne particles of glasswool fibers and or ceramic fibers known to the State of California to c
13. equipped with drain cocks to drain sediment and sludge from lowest points of boiler STEP 3 INSTALLING HYDRONIC COMPONENTS A low water cutoff must be installed to protect the unit from dry fire Screw extension nipple into 3 4 tapping on top of the absorption unit and install relief valve into top of nipple with the spindle in the vertical position i e with the valve dis charge in the horizontal WARNING Never install any type of valve between the boiler and the relief valve or an explosion causing extensive property damage severe personal injury or death may occur Most localities require the discharge piping to terminate with in 6 of the floor Check local code requirements if in doubt Discharge piping must be of same size or larger than the relief valve outlet and should be run as short and straight as possible Elbows in the discharge piping should be placed as close to the valve as possible If valve discharge is to be drained away the discharge piping must not be hard piped to the drain piping i e an open funnel or similar arrangement must be used CAUTION Piping must be installed from the relief valve discharge so there will be no danger of scalding person nel STEAM SUPPLY GATE VALVE MUST BE CLOSE NIPPLE HARTFORD LOOP E RETURN GATE TAPPING VALVE Gt 12 MIN Y WATER LINE C L OF HARTFORD LOOP
14. should appear at the pilot ignition electrodes FIGURE 3 1 STEAM CONTROL ARRANGEMENT Ela PRESSURE PRESSURE RELIEF VALVE CONTROL lt e PRESSURE 4 GAUGE Qo PRESSURE RELIEF VALVE DISCHARGE PIPING GAS VALVE 9 SS Fs b Set thermostat to no longer call for heat Spark should stop Observe that damper position indicator rotates to the closed position c Set thermostat to call for heat 3 Light the boiler For Model GB200 boilers with intermit tent pilot see lighting instruction on Page 14 4 Observe pilot and main burner flame see Figure 3 2 All burner ports should be ignited and burn with a steady blue flame CAUTION Never leave the job with yellow burning flames This condition indicated poor combustion and will quickly carbonize the boiler reducing efficiency and boiler life It may also be an indication of improper vent ing or combustion air supply If unable to adjust flame properly consult your local utility 5 Boilers are shipped from the factory with the primary air shutters on the main burner wide open It is recommend ed these air shutters be left in the wide open position unless there is lifting of the flame above the burner ports If there is lifting the air shutters should be gradually closed until the lifting is eliminated It may also be neces sary to adjust the primary air shutters if the input rate is reduced by a change in th
15. 0172 1 1 1 1 30 Ignitor Control S8600M 1013 N G L P 51177 1 1 1 1 For L P also order Conversion Kit 50701 FIGURE 1 GB200 GENERAL ASSEMBLY 18 WARNING Any appliance that burns natural gas propane gas fuel oil wood or coal is capable of producing carbon monoxide CO Carbon monoxide CO is a gas which is odorless colorless and tasteless but is very toxic If your Smith boiler is not working properly or is not vented properly dangerous levels of CO may accumulate CO is lighter than air and thus may travel throughout the building Brief exposure to high concentrations of CO or prolonged exposure to lesser amounts of CO may result in carbon monoxide poisoning Exposure can be fatal and exposure to high concentrations may result in the sudden onset of symptoms including uncon sciousness Symptoms of CO poisoning include dizziness vision problems shortness of breath headaches loss of muscle control unclear thinking nausea weakness unconsciousness The symptoms of CO poisoning are often confused with those of influenza and the highest incidence of poisoning occurs at the onset of cold weather or during flu season A victim may not experience any symptoms only one symptom or a few symp toms Suspect the presence of carbon monoxide if symptoms tend to disappear when you leave your home The following signs may indicate the presence of
16. 3 Pressuretrol PA404A 50493 1 17 1 1 24 Press Gauge 0 15 P S I 60268 1 1 1 1 25 Water Gauge 59199 1 1 1 1 26 Pressure Relief Valve 15 P S I 61980 1 1 1 1 27 Draft Diverter 59212 1 Draft Diverter 59213 1 Draft Diverter 59214 1 Draft Diverter 59215 1 31 Junction Box 4 x 4 60178 1 1 1 1 Silicone Sealant 11 oz Not Shown 40440 3 8 Fiberglass Rope 5ft Not Shown Block to Base Seal 99085 32 Vent Damper W Harness Ass y 69425 1 Vent Damper W Harness Ass y 69426 1 1 Vent Damper W Harness Ass y 69427 1 33 Spill Switch Manual Reset 59271 1 1 1 1 34 Rollout Switch Manuall Reset 59273 1 1 1 1 REF NAME OF PART PART NO GB200 3 GB200 4L GB200 4H GB200 5 Standing Pilot 5 Pilot Ass y NG Q314ALB Q309A 72364 1 1 1 Pilot Ass y NG Q314ALB Q309A 72365 1 Pilot Ass y LP Q314ALB Q309A 72370 1 1 1 1 Pilot Ass y LP Q314ALB Q309D 72371 1 Thermocouple K16RA 30D 59109 1 1 1 Thermocouple K16RA 36D 51006 1 9 Gas Valve NG VR8200H 1129 NG LP 59129 1 1 1 1 28 Transformer 115 24 V 50172 1 1 1 1 Honeywell Intermittent Pilot System 5 Pilot Ass y NG Q3451B 72352 1 1 1 Pilot Ass y NG Q3451B 72353 1 Pilot Ass y LP Q3451B 72358 1 1 1 Pilot Ass y LP Q3451B 72359 1 Ignition Cable 24 Lg 59306 1 1 1 Ignition Cable 30 Lg 59307 1 9 Gas Valve 24V NG VR8204H 1006 NG LP 59127 1 1 1 1 28 Transformer 120 24 V 43VA 5
17. 5 250 225 210 600 560 530 490 460 410 380 350 320 150 1 500 990 930 870 780 710 650 610 850 1 700 1 600 1 500 1 400 1 250 1 130 1 050 980 3 3 026 8 500 5 900 4 700 4 100 3 600 3 250 3 000 2 800 2 600 2 500 2 200 2 000 1 850 1 700 4 4 026 17 50012 000 9 700 8 300 7 400 6 800 6 200 5 800 5 400 5 100 4 500 4 100 3 800 3 500 Maximum Capacity of Pipe in Thousands of Btu per Hour of Undiluted Liquefied Petroleum Gases at 11 Inches Water Column Inlet Pressure Based on a Pressure Drop of 0 5 Inch Water Column Nominal Length of Pipe Feet 10 20 30 40 50 60 70 80 90 100 125 150 Inches 1 2 275 189 152 129 114 103 96 89 83 78 69 63 3 4 567 393 315 267 237 217 196 185 173 162 146 132 1 1071 732 590 504 448 409 378 346 322 307 275 252 1 1 4 2205 1496 1212 1039 937 834 771 724 677 630 567 511 1 1 2 3307 2299 1858 1559 1417 1275 1180 1086 1023 967 866 1787 2 6221 4331 3465 2992 2646 2394 2205 2047 1921 1811 1606 1498 Example Boiler Model GB200 4H is to be installed The distance from the existing gas meter to the installation site is 30 ft What pipe size must be used The local utility indicates the heating value of natural gas being supplied is 1000 Btu per cu ft Determine cubic feet of gas per hour for above boiler model 135 000 Btu per hour 1 ft h 1000 Btu per cu ft Aa cu per Tor 1 Find 30 ft in upper portion of the table for natural gas under Length of Pipe Feet heading 2
18. ELD FACTORY WIRING TERIS FACTORY WIRING O THERMOSTAT CONTROL LOW WATER CONTROL CUTE PRESSURE CUTOFF PRESSURE B BUR CONTROL NU 8 BU CONTROL 2 1 P1 B2 A NER 2 1 P1P2 A NER EE o o SPILL Pe f SF SPILL 1 SWITCH 115 24 gt SWITCH 115 24 i 2 LUE TRANSF BLUE 5 FL zn WHT 115V 2 m p 115V 2 Spe passe REQ e eS GAS VALVE 58600 ej BLK e in wv Pv HA GAS VALVE WHT WHT BLK Pv PV VENT 4e RED o yoL 9 GND DAMPER pot O 2 WHT BLUE VENT 24 CND 5 DAMPER REO 2 SWITC Es GNITER switch SENSOR SPARK IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE BOILER IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE BOILER MUST REPLACED MSE A SIMILAR WIRE 1099 RATING MUST BE REPLACED USE A SIMILAR WIRE OF 105 C RATING H N H N ILLU 115 24 a UM 4 A Aaa rmm LWCO E LWCO e 4 P 2 N N wusste ere m r2 6 c 3 SPILL SWITCH PRESSURE T STAT OR 8 seni swrCH PRESSURE T STAT
19. GB200 IM 5 GB200 SERIES v INSTALLATION OPERATION GAS FIRED STEAM CAST IRON BOILERS 85 000 TO 165 000 BTUH INPUT INTERMITTENT PILOT VENT DAMPER amp STANDING PILOT VENT DAMPER TABLE OF CONTENTS SECTION 1 INTRODUCTION Step 6 Wiring Boiler 9 Code Compliance 2 SECTION 3 START UP amp OPERATION Venting Requirements 2 Sequence Of Operation 11 Chimney Requirements 3 Prior To 11 Combustion Air Requirements 3 Start Up amp Adjustments 11 Water Treatment 3 Shipment of Boiler 3 SECTION 4 MAINTENANCE Before Each Heating Season 14 SECTION 2 BOILER INSTALLATION Steam Boiler Cleaning Instructions 15 Step 1 Locating Setting Boiler 4 How To Change Orifices 15 Step 2 Installing Steam Piping 5 Heating System Problems amp Causes 15 Step 3 Installing Hydronic Components 5 REPLACEMENT PARTS 16 17 Step 4 Venting Boiler 6 Step 5 Installing Testing Gas 0 7 WARNINGS 20
20. OR BURNER o CONTROL CNTRL BURNER ej CONTROL CNTRL i GAS VALVE Em 1 VENT V VENT N E 4 DAMPER 149 DAMPER 2 TR ROLLOUT GAS VALVE Nds 145 SWITCH TH TR PV AA 4 N S re ROLLOUT SE 1 SWITCH 24 GND 7 24 IGNITER SENSOR SPARK NATURAL GAS 3 THRU 7 SECTION LP GAS 3 THRU 9 SECTION SPILL AND ROLLOUT SWITCHES SPILL amp ROLLGUT SWITCHES GN 3 THRU 6 SECTION ONLY 60392 ON 3 THRU 6 SECTION ONLY 50395 10 SECTION 3 START UP amp OPERATION SEQUENCE OF OPERATION For sequence of operation of the particular boiler being installed refer to Figures 2 8 2 9 2 10 and 2 11 in Section 2 of this manual Spill and rollout switches are mounted on all GB200 boilers The spill switch detects the escape of combustion products through the draft diverter relief opening and interrupts the power to the gas valve preventing unsafe boiler operation Escape of flue products could be caused by a blocked or col lapsed chimney or inadequate chimney draft This is a manu al reset type device and can be reactivated by depressing the spill switch reset button mounted on the left of the boiler s draft diverter see Figure 2 1 for switch location The rollout switch prevents flame rollout from the boiler com bustion chamber caused by blocked boiler flue passage ways by interrupting power to the gas valve to prevent unsafe boiler operation Thi
21. PPED WITH STANDING PILOT VENT DAMPER FLOAT TYPE LWCO AND DAMPER HI LIMIT amp 67 LWCUO MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND REMAINS CLOSED DURING STANDBY 1 MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND SENSING CIRCUIT IS CONTINUOUSLY MONITORED REMAINS CLOSED DURING STANDBY THERMOSTAT OPERATING CONTROL CALLS FOR HEAT 2 STANDING PILOT REMAINS LIT DAMPER BLADE OPENS 3 SENSING CIRCUIT IS CONTINUOUSLY MONITORED DAMPER END SWITCH CLOSES PROVING DAMPER OPEN 4 THERMOSTAT OPERATING CONTROL CALLS FOR HEAT IF NO FAILURE EXISTS THE PILOT VALVE AND IGNITER 5 DAMPER BLADE OPENS ARE ENERGIZED 6 DAMPER END SWITCH CLOSES PROVING VENT DAMPER PILOT IS IGNITED AND SENSOR SENSES FLAME OPEN MAIN VALVE IS ENERGIZED AND IGNITER DE ENERGIZED 7 MAIN VALVE IS ENERGIZED UNIT OPERATES UNTIL THERMOSTAT OPERATING 8 UNIT OPERATES UNTIL THERMOSTAT OR OPERATING CONTROL IS SATISFIED CONTROL IS SATISFIED SYSTEM RETURNS TO STANDBY WITH DAMPER CLOSED 9 SYSTEM RETURNS TO STANDBY WITH DAMPER CLOSED THERMOSTAT FIELD WIRING FIELD WIRING eee 12 FACTORY WIRING FACTORY WIRING 1 1 uin THERMOSTAT SPILL PRESSURE OR OPERATING SWITCH 44 CONTROL BLUE BLUE 52 CONTROL sO in a ROLLOUT i SWITCH 4 115 24V SWITCH TRANSF M M 67 1 BLK 5 L1 LOW WATER 2 Z 60HZ CUTOFF ol L 5 BLK 5 AC E Le GAS VALVE E lt 8600 PE TH TR py BLK I il 1 ancy
22. THERMOSTAT CONNECTION FIGURE 2 4A VENT DAMPER INSTALLATION FOR STANDING PILOT VENT DAMPER SPILL SWITCH N CABLE BRACKET f DK BLUE PRESSURE CONTROL lt THERMOSTAT CONNECTION E as TRANSFORMER GAS VALVE THERMOSTAT CONNECTION ADDITIONAL CHIMNEY REQUIREMENTS Chimney condition is of paramount importance for a safe and efficient boiler installation All installations must include a chimney inspection by a qualified individual or agency Chim ney construction materials must be compatible with the fuel being used See Figure 2 5A Particular attention should be paid on all oil to gas conver sions Soot may have accumulated in chimney and or degraded chimney liner Most utilities require complete chim ney cleaning Others may require installation of new liner spill switches or other chimney upgrades Check with local utility for required safety precautions DANGER A chimney which does not meet modern safety standards will result in a fire or deadly carbon monoxide poisoning of the building residents STEP 5 INSTALLING TESTING GAS PIPING Connect the gas piping from the meter to the boiler using a pipe size which will result in a pressure drop of less than 0 3 W C for na
23. TO BE 2 BELOW WATER LINE 23 1 4 STEP 4 VENTING BOILER A factory mounted spill switch is provided on all GB200 boil ers see Figures 2 4 amp 2 4A DANGER Draft diverter vent outlet and vent damper as supplied must not be altered in any way as proper boiler operation would be jeopardized Flame rollout fire or carbon monoxide poisoning will result The flue or vent connectors must be installed flush with the inside chimney liner surface and sealed in place with furnace cement Horizontal positions of the single wall and type B venting systems shall be supported by use of strap hangers or their equivalent Vent supports should be placed a maxi mum of 15 feet apart and as required to prevent sagging The vent connectors shall be pitched 1 4 per foot upwards towards the chimney or vent termination Installing Vent Damper DANGER Only the boiler may be served by the vent damper Do not attempt to use it to vent an addition al appliance This will cause fire or carbon monoxide poisoning The vent damper must be mounted directly on top of the draft diverter The vent outlet extension must be installed between the damper and the outlet to allow the damper plate to open and close Locate the motor on the front side and position the cable so that it does not touch the metal surface of the draft diverter see Figure 2 4 If necessary turn angle connector on vent damper upward until cable clears tighten lo
24. W C for natural gas and 10 W C for propane Turn adjusting screw clockwise to increase gas flow increase input Turn adjusting screw counterclockwise to decrease gas flow decrease input In no case should final manifold pressure setting vary more than 3 from factory set pressures If rated input cannot be obtained with adjustment gas supply pressure or orifice size may be cause Consult local utility and Smith Gas burner orifices supplied with boiler have been care fully designed to provide correct gas input rate for most gas conditions typically found in the U S Occasionally however local gas characteristics may not allow unit to be properly adjusted for input If this is the case local utility or Smith may recommend orifices be changed When changing orifices follow the procedures detailed in Section 4 of this manual 12 9 Start and stop burners several times by raising and low ering the thermostat setting 10 After boiler has been firing long enough to raise boiler pressure above minimum setting of the primary pressure tol limit check limit by turning its setting from maximum to minimum setting This should turn boiler off Return limit to desired setting 11 Check boiler safety shutoff controls For boilers with intermittent pilot with boiler firing discon nect wire connected to the PV terminal on the Honey well S8600 control The gas valve should close For boilers with constant pilot with boile
25. ause cancer through inhalation Smith CAST IRON BOILERS WESTCAST INC 260 NORTH ELM STREET WESTFIELD MA 01085 TEL 413 562 9631 FAX 413 562 3799 www smithboiler com 20
26. cknut to secure The direction of the flow arrow imprinted on the vent damper must point upward The damper position indicator which is located on the side of the vent damper opposite the motor must be visible CAUTION A minimum of 6 between vent damper and combustible materials must be maintained The vent damper must be accessible for servicing and checking position indicator If applicable remove hairpin shipping clip which holds damper blade in closed position and observe that damper blade rotates slowly to open position Do not force it closed as it may damage the gear train and void the warranty The blade should move freely and without obstruction Secure the vent damper housing to the draft diverter outlet with sheet metal screws or pop rivets Refer to Figure 2 5 for fastener locations Install flue pipe over top of vent damper and secure to damper housing with sheet metal screws or pop rivets Attach vent damper cable to cable clamp on boiler left panel and join the Molex connector see Figures 2 4 amp 2 4 FIGURE 2 4 VENT DAMPER INSTALLATION FOR INTERMITTENT PILOT VENT DAMPER SPILL PRESSURE CONTROL SWITCH CABLE BRACKET EY DK BLUE o THERMOSTAT CONNECTION TRANSFORMER PILOT CONTROL ve a _
27. d in operation while other appliances remaining connected to the common venting sys tem are not in operation 1 Seal all unused openings in common venting system 2 Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition 3 Insofar as is practical close all building doors and win dows and all doors between the space in which the appli ances remaining connected to the common venting sys tem are located and other spaces of the building Turn on clothes dryers and any appliance 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 4 Place in operation the appliance being inspected Follow the lighting instructions Adjust thermostat so appliance will operate continuously 5 Test for spillage at draft hood relief opening after 5 min utes of main burner operation Use the flame of a match or candle or smoke from cigarette cigar or pipe 6 After it has been determined that each appliance remain ing connected to common venting system properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burn ing appliance to previous conditions of use 7 Any improper operati
28. e or explosion Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the con trol system and any gas control which has been under water LIGHTING CONTINUOUS PILOT INSTRUCTIONS Honeywell VR8200 Natural or Propane Gas STOP Read the safety information above Set the thermostat to lowest setting Turn off all electric power to the appliance Remove control access panel if applicable Rotate gas control knob clockwise to OFF Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you then smell gas STOP Follow A in the safety information above If you don t smell gas go to next step Remove the pilot access panel located below and behind the gas control unit if applicable Find pilot follow metal tube from gas control The pilot is between the two burner tubes behind the pilot access panel if applicable Turn gas control knob counterclockwise to PILOT Push down and hold the red button next to the control knob Immediately light the pilot with a match Continue to hold the red button down for about one 1 minute after the pilot is lit Release button and it will pop back up Pilot should remain lit If it goes out repeat steps 5 through 10 f button does not pop up when released stop and immediately call your service technician or gas suppli er
29. e orifices 6 After burner has been in operation for about 10 minutes check gas input rate to boiler as follows a Make sure all appliances served by the meter are turned off during timing of gas input rate to the boiler b Measure the time in seconds that it takes for the boiler to use 10 cubic feet of gas Divide 36 000 by the number of seconds this is the number of cubic feet of gas used per hour Multiply this figure by the heating value of the gas to obtain Btu input per hour FIGURE 3 2 BURNER FLAME COMPARISON PILOT FLAME Q3451B INTERMITTENT IGNITION PILOT MODELS 5 Q314A Q309A CONSTANT PILOT MODELS e NORMAL PILOT FLAME M S NORMAL LIFTING HARD FLAME TOO MUCH AIR YELLOW YELLOW TIPPING FLAME MARGINAL TOO LITTLE AIR MAIN BURNER FLAMES Example A GB200 4L boiler takes 5 minutes 27 seconds to use 10 cubic feet of natural gas The local utility indicated the heating value of the natural gas being supplied is 1000 Btu cu ft Therefore 5 minutes 27 seconds 327 seconds 36 000 327 1000 110 000 Btu hr Therefore the boiler input is correct NOTE Before calculating the input of the heating equip ment obtain the heating value of the gas from the local utility 7 f input needs to be corrected adjust combination gas valve pressure regulator Regulator is factory set at 3 1 2
30. i 3 4 PLUGGED LOW TAPPING WATER WATER m CUT OFF LEVEL 5 Bg n INDICATOR jen mE ANC ANS AN US s Is 1 4 Apr SA d 1 2 2 RETURN T PLUGGED TAPPING A ROLLOUT SWITCH 26 7 8 23 7 8 23 1 4 23 1 4 21 18 1 4 14 3 4 14 3 4 33 8 IIIT C Y Y ty F 2 RETURN 9 0 102 FRONT 18 1 8 21 7 8 23 8 63 4 wht A 18 1 8 LEFT SIDE VIEW FRONT VIEW RIGHT SIDE VIEW FIGURE 2 2 RECOMMENDED FIREPROOF BASE F 6 OVERHANG OF BLOCKS AND SHEETMETAL ALL AROUND 4 HOLLOW CLAY TILE TWO COURSES OPENINGS THRU BLOCKS IN TOP COURSE TO BE AT 90 ANGLE TO OPENINGS THRU BOTTOM COURSE 22 GAUGE SHEETMETAL STEP 2 INSTALLING STEAM PIPING Typical piping connections are shown in Figure 2 3 All exter nal piping must be supported by hangers not by the boiler or its accessories Supply outlet must run full size from the boiler to a header at least 24 above top of boiler Condensate return piping should be connected to boiler through a Hartford Loop Install gate valves in supply and return Proper steam piping practices must be followed at all times Maintain proper clearances between piping and combustible material FIGURE 2 3 TYPICAL STEAM BOILER PIPING The supply and return lines should be
31. mum test the operation of electronic controls at least once a year Remove clean and inspect the probe Float type controls should be flushed once a month during the heating season If LWCO fails to operate properly it must be replaced 6 Follow System Start Up amp Adjustments procedures in Section 3 of this manual STEAM BOILER CLEANING INSTRUCTIONS The following procedures must be followed on initial start up and if the presence of sediment sludge or impurities hamper proper boiler operations 1 With gate valves closed on supply and return lines start burner and allow boiler to become pressurized so that the pres suretol may be adjusted and set for limit cut off desired nor mally about 3 psi Turn off burner and allow pressure to drop to 0 psi then proceed with the following cleaning procedure 2 Remove the pressure relief valve 3 Add caustic soda lewis lye through this opening at the rate of one pound per thousand square feet of radiation capacity Scout Squirk or similar steam boiler cleaners may be used instead of lye Trisodium phosphate 1 42 is also an excellent cleaner 4 Provide pipe connection full size from pressure relief valve opening to a convenient drain to serve as a vent 5 Fill the boiler with a manual fill valve until water starts to trickle from this pipe 6 Fire boiler at sufficient rate to generate and maintain steam Entrain water and impurities will then discharge with steam f
32. on may melt or degrade exposing bare All electrical and control wiring must be installed in accor wire dance with the codes listed in Section 1 of this manual Fol low the wiring diagram for your particular installation as NOTE Boiler transformer must not be used to power shown in Figures 2 8 2 9 2 10 and 2 11 external accessories i e Zone valves relays etc Oth erwise transformer will be overloaded and burn out cause electric shock death FIGURE 2 8 Wiring Diagram amp Operation Sequence for FIGURE 2 9 Wiring Diagram amp Operation Sequence for Boilers Equipped with Intermittent Pilot Vent Damper Boilers Equipped with Standing Pilot Vent Damper and and M amp M 67 Low Water Cut Off M amp M 67 Low Water Cut Off oe 2 un WEN OPERATING SEQUENCE FOR STEAM BDILERS E OIL EQUI
33. on of the common venting system should be corrected so the installation conforms with National Fuel Gas Code ANSI Z223 1 latest edition When resizing any portion of the common venting sys tem the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Appendix G in the National Fuel Gas Code ANSI Z223 1 latest edition CHIMNEY REQUIREMENTS DANGER A chimney which does not meet modern safety standards will result in a fire or deadly carbon poisoning of the building residents Chimney condition is of paramount importance for a safe and efficient boiler installation All new and replacement installa tions must include a chimney inspection by a qualified indi vidual or agency Chimney construction materials must be compatible with the fuel being used Particular attention should be paid on all oil to gas conver sions Soot may have accumulated in chimney and or degraded chimney liner Most utilities require complete chim ney cleaning Others may require installation of new liner spill switches or other chimney upgrades Check with local utility for required safety precautions COMBUSTION AIR REQUIREMENTS Provisions for combustion air must be in accordance with the National Fuel Gas Code ANSI Z223 1 latest edition as well as all applicable local codes If the boiler is installed in an unconfined space adequate air will be available via normal infilt
34. r firing turn the gas control knob on the gas valve to PILOT The burn ers should go out Extinguish the pilot and wait 3 min utes Turn the gas valve control knob to ON There should be NO gas flow to the main burners with the pilot out If gas flow is detected immediately turn the gas valve control knob to OFF and have the problem cor rected 12 On initial start up and prior to each heating season boil er must be cleaned with a commercially available steam boiler cleaner see Steam Boiler Cleaning Instructions in Section 4 of this manual OO c Ns WARNING If you do not follow these instructions exactly a fire or explosion may result with property damage personal injury or loss of life BEFORE OPERATING 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 What to do if you smell gas Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions f you cannot reach your gas supplier call the fire department B C 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 don t try to repair it call a qualified service tech nician Force or attempted repair may result in a fir
35. r is not for use in systems where water is replenished Minerals in the water can build up on the heat transfer surfaces and cause overheating and subse quent failure of the heat exchanger NOTE Boiler utilizes synthetic rubber seals Water treat ment chemicals and system cleaning chemicals must be compatible with this and all other construction materials SHIPMENT OF BOILER Each boiler is shipped in a single carton Optional Vent Damper When ordered the vent damper is shipped in an individual carton packaged with the boiler Mounting of the damper and flue outlet extension are required SECTION 2 BOILER INSTALLATION STEP 1 LOCATING SETTING BOILER Boiler may be installed in an alcove see dimensions in Fig ure 2 1 Locate boiler so connecting flue pipe between draft hood and chimney is as short as possible Observe the following minimum clearances to combustibles 18 on sides alcove at front 28 at top 18 at rear 6 from flue pipe in any direction Maintain a minimum 1 clearance between hot water piping and combustible materials Local code requirements may specify greater clearances and must be adhered to Remove boiler from carton and set it in position Install on non combustible floor only unless local codes permit use and fabrication of a fireproof base see Figure 2 2 FIGURE 2 1 MODEL GB200 BOILER DIMENSIONS Remove all packing material from boiler Check that burners draft diverter and controls
36. ration However if building construction is unusually tight or the boiler is installed in a confined space a space whose volume is less than 50 cubic feet per 1000 Btu hr of gas input for all fuel burning equipment adequate air for combustion must be provided by two openings one located about 6 below the ceiling the other about 6 above the floor When communicating directly with the outside or through a vertical duct each opening must have a minimum free area of one square inch per 4000 Btu hr of gas input Horizontal ducts to the outside must have a minimum free area of one square inch per 2000 Btu hr of gas input When ventilation is provid ed by openings in doors etc to adjoining spaces having ade quate infiltration each opening must have a minimum free area of one square inch per 1000 Btu hr of gas input WARNING Adequate fresh air must be provided for combustion Improper boiler operation and inade quate venting of deadly flue gases may otherwise result NOTE Boiler employs atmospheric combustion Com bustion air must not be contaminated with halogenated hydrocarbon vapors aerosol propellants or freon Other wise boiler heat exchanger will be subject to corrosion reducing boiler life WATER TREATMENT Water treatment is recommended in areas where water quali ty is a problem A local water treatment company should be consulted to determine the requirements for your particular system and locality NOTE Boile
37. rom open vent Add water as necessary so that the low water cutoff does not shut off burner 7 Continue this process for a minimum of one hour The process should continue until the steam is dry no water coming from the vent when the water in the gauge glass is at a normal level approximately 2 3 full The time required could vary up to 3 hours 8 Turn gas valve to off position While boiler is still hot drain completely through boiler drain Make sure that all low points in the return line are also completely drained These areas could trap chemicals and dirt 9 Close boiler drain and refill with clean untreated warm water If warm water is not used fill very slowly so as not to crack boiler sections Fill until water overflows through vent pipe and runs clear 10 Completely drain boiler again Refill with clean untreated water to normal level 15 11 Remove vent drain piping and reinstall pressure relief valve Open gate valves on supply and return lines Turn on burner System is now ready to operate HOW TO CHANGE ORIFICES 1 Shut off power supply and gas supply to the boiler 2 Remove burner access panel Lift burners up and to rear until burners are disengaged from orifices 3 Check orifices for proper drill size Size is stamped onto the body of the brass orifice see Figure 4 1 Size can also be checked by using a pin gauge FIGURE 4 1 GB200 ORIFICE SIZES Boiler ido id GB200 3 GB200 4L GB200 4H
38. s is a manual reset type device and can be reactivated by depressing the rollout switch reset button mounted on the lower front jacket panel see Figure 2 1 for switch location Flue passages must be inspected by a qualified installer if this problem occurs prior to switch replacement WARNING If boiler cannot be restored to normal operation after re setting of spill switch or if flame rollout switch has tripped do not attempt to put the boiler in operation Immediately contact a qualified service professional PRIOR TO START UP Fill system with water until the water level indicator sight glass is approximately 2 3 full This water level is 23 from the surface on which the boiler sits SYSTEM START UP amp ADJUSTMENTS Safe lighting and other performance criteria were met with the gas manifold and control assembly provided on the boiler when the boiler underwent tests specified in ANSI 221 13 LATEST EDITION WARNING Keep boiler area clear and free from com bustible materials gasoline and other flammable vapors and liquids Otherwise fire or explosion may result 1 Check combination gas valve on boiler and make sure it is in the OFF position 2 For vent damper equipped models with the thermostat set to call for heat observe that vent damper position indicator rotates to the open position see Figure 2 5 Damper must be in the open position when appliance main burner is operating a After damper opens spark
39. st edition and any addi tional state or local code requirements If an external source is utilized the boiler when installed must be electrically grounded in accordance with requirements of the authority having jurisdiction or in the absence of such requirements with the National Electrical Code ANSI NFPA No 70 latest edition UL listed power limited circuit cable is almost univer sally approved for safety controls on heating equipment either internally or externally without protection of conduits or raceway VENTING REQUIREMENTS When connecting to gas vents or chimneys vent installations shall be in accordance with Part 7 Venting of Equipment of the National Fuel Gas Code ANSI Z223 1 latest edition or applicable provisions of the local building codes Vent connectors serving appliances vented by natural draft shall not be connected into any portion of mechanical draft Systems operating under positive pressure When two or more appliances vent into a common flue the area of the common flue should be at least equal to the area of the largest flue plus 50 of the areas of the additional flue or vent connectors When existing boiler is removed from common venting sys tem common venting system is likely to be too large for proper venting of appliances remaining connected to it At time of removal of existing boiler the following steps shall be followed with each appliance remaining connected to the common venting system place
40. tural gas or 0 5 W C for propane See Figure 2 7 for the appropriate gas pipe sizing and example Good piping practices should be followed at all times See Figure 2 6 for a typical gas piping arrangement All piping must be supported by hangers not by the boiler or its acces sories Install a full sized sediment trap at the low point in gas line upstream of gas valve Install a non restrictive lubricated plug valve in the gas line close to the boiler Install a ground joint union at the gas valve inlet to allow for servicing Check local codes and utilities for any special requirements and proce dures Pipe joint compound pipe dope must be compatible with the fuel natural gas or propane being used FIGURE 2 6 TYPICAL GAS PIPING FIGURE 2 5 ATTACHING VENT DAMPER TO DRAFT DIVERTER amp FLUE PIPE MAKE SURE MOTOR IS LOCATED ON FRONT SIDE CLOSED A FLOW DIRECTION FLOW DIRECTION ARROW POINTS UP REAR VIEW MOUNT VENT DAMPER OVER DRAFT DIVERTER INSTALL SWITCH IN OPENING ON DRAFT DIVERTER BEAM TS RISER OTHER APPLIANCES IN d MANUAL Ef MAIN SHUT DFF PIPE CLAMP TN GAS METER ji td GAS VALVE UNION SEDIMENT TRAP W FIGURE 2 5A VENTING USE VENT SUPPORTCS AS REQUIRED PREVENT SAGGING
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