Évaluations - 1, GPA: 3
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To obtain cubic feet per hour, divide the input by 1000. b) Size for rated boiler input. c) Inlet gas pressure: 5" W.C. minimum 13" W.C. maximum d) Manifold gas pressure: 3V2" W.C. e) Install 100% lock-up gas pressure regulator in supply line if inlet pressure exceeds 13“ W.C. Adjust for 13" W.C. maximum. PI PE DELIVERY SCHEDULE Length of Pipe in Feet •CAPACITY OF PIPE IN CUBIC FEET OF GAS PER HOUR V2" 3/4" 1" 11/«" IV2" 10 132 278 520 1050 1600 20 92 190 350 730 1100 30 73 152 285 590 890 40 63 130 245 500 760 50 56 115 215 440 670 75 45 93 175 360 545 100 38 79 150 305 460 150 31 64 120 250 380 * Flow determined by Dr. Pole’s Formula—0.60 Specific Gravity, 0.30 inches water column pressure drop. NOTE: For additional piping schedules, see ANSI Z223.1. ADDITIONAL LENGTH OF PIPE TO BE ADDED FOR EACH ELBOW OR TEE BEND IN THE LINE Pipe Size, Inches Additional Length, Feet V2 1.3 3/4 1.7 1 2.2 1'/4 2.9 11/2 3.3 2. For propane gas: a) Inlet gas pressure: 11" W.C. minimum 13” W.C. maximum b) Manifold gas pressure: 10" W.C. c) Gas pressure regulator provided by gas supplier must be adjusted for maximum pressure of 13" W.C. d) Contact gas supplier to size pipes, tanks and regulator. 3. Remove jacket door and refer to Figure 11 for gas piping. GAS SUPPLY PIPING FIGURE 11 4. Follow good piping practices. 5. Pipe joint compound (pipe dope) must be resistant to corrosive action of liquified petroleum gases and applied sparingly only to male threads of pipe joints. 6. Install drip leg at inlet of gas connection to boiler. Where local utility requires drip leg be extended to the floor, use an appropriate length of pipe between the cap and tee. 7. Install ground joint union to provide for servicing, when required. 8. Install manual shut-off valve in gas supply piping outside boiler jacket when required by local codes or utility requirements. 9. Support piping by hangers, not by the boiler or its accessories. 10. Purge all air from supply piping. 11. Check factory installed piping and field installed piping for leaks-BUBBLE TEST. CAUTION a) DO NOT check for gas leaks with an open flame— BUBBLE TEST. b) Close manual main shut-off valve during any pressure testing at less than 13 inches water column. c) Disconnect boiler and gas valve from gas supply piping during any pressure test greater than 13 inches water column. Section V: Wiring Refer to wiring diagram label on jacket door and Control Supplement for specific wiring details. WARNING WIRING For your safety, turn off electrical power supply at service entrance panel before making any electrical connections to avoid possible electrical shock hazard. All wiring must be installed in accordance with requirements of the National Electrical Code and any additional national, state, or local code requirements having jurisdiction. All safety circuit wiring must be N.E.C. Class 1. The boiler must be electrically grounded in accordance with the National Electrical Code, ANSI/NFPA No. 70-1984. Use 90 °C Thermoplastic Wire, or equivalent, if any original wire must be replaced. The boiler is shipped with the control components completely wired. A separate electrical circuit should be used for the boiler with a fused disconnect switch (15 amp. recommended). Bring electrical supply through proper opening in jacket left end panel and into electrical junction box. Wire electrical supply to leads injunction box as shown on the diagram. INSTALL ROOM THERMOSTAT Install room thermostat on an inside wall. Never install where it will be influenced by drafts, hot or cold water pipes, lighting fixtures, television, sun rays or near a fireplace. Heat anticipator in thermostat must be set to match power requirements of primary control to which it is connected. Refer to wiring diagram on jacket door or in Control Supplement for recommended heat anticipator setting with standard equipment. Wire thermostat as shown. WIRING MULTIPLE ZONES Refer to zone valve manufacturer’s literature for wiring and application. A separate transformer is required to power zone valves. Zoning with circulators requires a relay for each circulator. 120:24 TRANSFORMER (MUST BE USED FOR THREE OR MORE ZONES) THERMOSTAT TYPICAL ZONE VALVE +° °4- -Vh TO ADDITIONAL ZONES TO THERMOSTAT TERMINALS ON BOILER TYPICAL WIRING—ZONING WITH ZONE VALVES FIGURE 12 Section VI: Final Adjustments WATER TREATMENT Never use petroleum based stop-leak compounds. Water seal deterioration will occur, resulting in leakage between sections. Continual make-up water will reduce boiler life. Minerals can build up in the sections, reducing heat transfer, overheating the cast iron, and causing section failure. For unusually hard water areas or low pH conditions (less than 7.0) consult local water treatment company. Freeze protection (when used): Use antifreeze especially made for hydronic systems. Inhibited propylene glycol is recommended. DO NOT use undiluted or automotiv...