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GAS-FIRED CAST-IRON BOILERS FOR NATURAL AND L.P. PROPANE GASES
“S” AND “SX” MODELS
®
HOT WATER MODELS S-34 THROUGH S-150
SENTRY
and SX-150 THROUGH SX-210
INSTALLATION AND OPERATING INSTRUCTIONS
CONTENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE IMPORTANT
READ ALL OF THE FOLLOWING WARNINGS AND
STATEMENTS BEFORE READING THE
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3
INSTALLATION INSTRUCTIONS
Installation Requirements:
Boiler Locatio
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2 Sentry
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Sentry 3 Approx. Dimensions Total Wt. (inches) Full of Boiler No. of Water (lb.) A B C D E FG Model Sect. CHIMNEY RECOMMENDATIONS (max) HEIGHT:15 ft. (minimum) from draft 1 5 1 S-34 2 8 ⁄8"14 ⁄8" 4 33" — — 6 ⁄4" 190 hood skirt to top of chimney. 1 5 1 1 S-60 3 11 ⁄8"17 ⁄8" 4 37" 4 ⁄2"26"6 ⁄4" 250 INSIDE DIAMETER: Same as dimen- 1 5 1 1 1 sion C (or larger). S-90 4 14 ⁄8"20 ⁄8" 5 37" 5 ⁄2"25 ⁄2"6 ⁄4" 310 NOTE: Larger chimney may be 1 5 1 1 S-120 5 17 ⁄8"23 ⁄8" 6 37" 7 ⁄2"25"6 ⁄4" 365 required if
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Sentry 4 C. Inspect for proper and tight construction. Any restrictions or WARNING obstructions must be removed. An existing chimney may LIQUEFIED PETROLEUM (L.P.) PROPANE require cleaning. GAS-FIRED BOILER LOCATION D. Chimney or vent must extend at least 3 feet above any REQUIRES SPECIAL ATTENTION ridge within 10 feet of the chimney. Liquefied Petroleum (L.P.) propane gas is heavier than air. Therefore, propane boilers, piping, valves should not be MINIMUM CLEARANCES FROM COMBUSTIBLE install
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Sentry 5 must be supported to prevent sagging by securing each joint 4. Carefully unpack the unit. DO NOT FORCE IT OPEN OR with metal screws and by providing hanger spaced no CLOSED. Forcing the damper may damage the gear greater than 5 feet apart. train and void the warranty. D. Vent or breeching into chimney should not be inserted past the inside wall of the chimney liner. E. All venting means should be inspected frequently. See Care and Maintenance and separate User's Information Manual. VENT
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6 Sentry Figure 4. Figure 8. Damper Vane TABLE Vent Size 4" 5" 6" 7" 8" 5 5 5 5 5 A9 ⁄16"10 ⁄16"11 ⁄16"12 ⁄16"13 ⁄16" Figure 5. Vent Damper Dimensions Figure 9. WARNING—DANGER Once you have begun vent damper installation procedure, DO NOT restore electric power and gas supply until installation and inspection have been completed (in order to prevent the main burners from operating). DO NOT operate the boiler until the vent damper harness "RECEPTACLE B" is plugged into "MALE PLUG" (as descr
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Sentry 7 Gas flow = 150,000 Btu/hour = 147 cu. ft. per hour B. 1. This device must be installed after the boiler draft hood 1020 Btu/cu.ft. (between the draft hood outlet and the connector to the out- door chimney or vent) as close to the draft hood as practi- At 30 ft. length of pipe, match required capacity from Table A cable, and without modification of the draft hood or the vent (choose higher capacity, in this case is 152 cu. ft. per hour). damper. (See figures 1, 2 and 3.) Required pipe si
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8 Sentry BOILER ROOM AIR SUPPLY AND VENTILATION An ample supply of air is required to obtain combustion and ventilation. ALL AIR COMES FROM OUTSIDE, directly through wall openings to the boiler or through unsealed openings around windows, doors, etc. in the whole building. When build- ings are insulated, caulked and weather stripped, now or later on, direct openings to outside may be required and should be provided. If the boiler is not near an outside wall, air may be ducted to it from outside
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Sentry 9 5. Using soap solution, check for gas leaks in all gas piping 8. Find pilot—follow metal tube from gas control. The pilot is from meter to boiler pilot and manifold. DO NOT use between two burner tubes behind the burner access panel. open flame. 9. Turn knob on gas control counterclockwise to "PILOT". II. INITIAL START Safe lighting and other performance criteria were met when testing various gas manifold and control assemblies used on the Sentry Series Boilers under the ANSI-Z21.13
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10 Sentry 2. Intermittent Pilot System (IID). FOR BOILERS EQUIPPED WITH HONEYWELL GAS VALVE VR8204 OR VR8304 (see figures 13 and 14). SAFETY INFORMATION FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance is equipped with an ignition device which automatically lights the pilot. DO NOT try to light the pilot by hand. B. BEFORE OPERATING smell all
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Sentry 11 2. Safety Shutdown Checkout a. Boiler (burner) is overfiring. CAUTION! National Fuel Gas Code ANSI Z223.1-latest edition, does NOT per- a. For proper operation the pilot should engulf the thermo- mit firing at a higher input rate than the input rate indi- couple or flame sensor as shown below. cated on the boiler rating plate in order to avoid haz- b. To adjust pilot, turn pilot flow adjustment screw on valve ardous conditions such as explosion or carbon clockwise or counterclockwise t
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12 Sentry 3. Water lines: slightest leaks should be corrected. 4. Low water cutoff, for operation (see instructions fur- nished with unit). 2. WATER LEVEL CHECK DURING HEATING SEASON A. Check water pressure regularly and add water slowly to system when needed. If much water is added, venting may be necessary. B. Regular loss of water from water boiler system may indi- cate either a system leak, or a faulty air control system, or a faulty automatic fill valve. 3. ANNUAL INSPECTION AND CLEANING A.
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Sentry 13 SEQUENCE OF OPERATION FOR SENTRY BOILERS EQUIPPED WITH CONTINUOUS BURNING PILOTS FOR DIAGRAMS SHOWN ON PAGE 14. LIGHTED PILOT HEATS THERMOCOUPLE AND KEEPS PILOTSTAT OPEN. THERMOSTAT CALLS FOR HEAT CIRCULATOR ENERGIZED HIGH LIMIT CONTACTS CLOSED? NO NO FURTHER (IF COMBINATION AQUASTAT LOW WATER CUT-OFF (WHEN USED) ACTION CONTROL USED) CONTACTS CLOSED? YES VENT DAMPER RELAY ENERGIZED. VENT DAMPER MOTOR OPENS VENT DAMPER. END SWITCH CLOSES. MAIN VALVE OPERATOR OPENS. LIGHTED PILOT IGNITES
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14 Sentry CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. “Verify proper operation after servicing.” WIRING DIAGRAM — CONTINUOUS PILOT
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Sentry 15 CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. “Verify proper operation after servicing.” WIRING DIAGRAM — INTERMITTENT IGNITION (IID)
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Sentry 16 PUMP OR VALVE ZONING OF WATER BOILERS COMBINATION CONTROLS WITH T TV Z TERMINALS* Pump Zoning system using R845A Relay. One R845A needed for each circulator. NOTE: Pumps are powered from C1 . Total pump load must not exceed 7.4 amp rating of combination control pump switch. Zone valve zoning system using Honeywell V8043F zone valves. Pump zoning system using R8230C Relays. *For zoning diagrams, combination controls without T TV Z terminals and non-c
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Sentry GENERAL TROUBLESHOOTING GUIDE FOR SERVICEPEOPLE 17 BURNERS FAIL TO OPERATE CAUSE REMEDY 1. Safety pilot out, or flame too low. 1. Check, clean, re-light. See instructions. 2. Gas supply valve shut off. 2. Open gas valve(s). 3. Electric switch open. 3. Close switch. 4. Blown or defective line fuse. 4. Replace fuse. 5. Operating or limit control contacts open or dirty. 5. Check control. Clean contacts or replace control. 6. Defective gas valve or pressure regulator; or plugged 6. Repair or
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Sentry 18 PIPING A HEATING - COOLING SYSTEM TO A WATER BOILER AND CHILLER The chiller must be piped in parallel with the boiler. Figure below Separate control devices on the boiler and chiller may be used, illustrates a method of piping a heating-cooling system to a or a single set of air and pressure controls on the common pip- water boiler and a chiller. Hand valves (shown) or automatic ing may be preferred. valves must be installed to prevent circulation of chilled water in If the boiler is u
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Sentry 19 APPENDIX A Removal of Existing Boiler from Common Vent System "At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation." (a) Seal any unused openings in the common venting system. (e) Test for spillage at the draft hood relief opening after 5 min- (b) Visually inspect the ve
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SLANT/FIN CORPORATION, Greenvale, N.Y. 11548 • Phone: (516) 484-2600 FAX: (516) 484-5921 • Canada: Slant/Fin LTD/LTEE, Mississauga, Ontario www.slantfin.com
