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Fabricar: Bradford-White Corp Tamaño del archivo: 1.23 mb Nombre del archivo: Idioma del manual:

SMITH PKG. NO. 211480). + PIPING AND FITTINGS BETWEEN GATE VALVES AND BOILERS SHOULD BE BRASS OR BRONZE. OTHER PIPING SHOULD CONFORM TO LOCAL CODES. GATE VALVES ARE SHOWN FOR SERVICING BOILER. HOWEVER, LOCAL CODES SHALL GOVERN THEIR USAGE. PRESSURE RELIEF VALVE RATING SHOULD NOT EXCEED PRESSURE CAPACITY OF ANY COMPONENT IN THE SYSTEM. INSTALL THERMOMETER AND PRESSURE RELIEF IN OPENINGS PROVIDED ON HW-520 & HW-610. USE THIS TABLE FOR CORRECT PUMPAND WATER PIPE SIZE FAIRLYROUGH PIPE Allowable Pressure Distance from Heater to Dishwasher (Feet./Meters) Drop (PSI) 25" (7.6m) 50" (15m) 75" (22.8m) 100" (30m) 175" (53m) 200" (60m) 250" (76m) 300" (91m) 10 3/4 3/4 3/4 3/4 1 1 1 1 20 1/2 3/4 3/4 3/4 3/4 3/4 3/4 1 30 1/2 1/2 3/4 3/4 3/4 3/4 3/4 3/4 40 1/2 1/2 3/4 3/4 3/4 3/4 3/4 3/4 50 1/2 1/2 1/2 3/4 3/4 3/4 3/4 3/4 NOTE: Allowable pressure drop is the difference in PSI between supply water pressure and the 20 PSI required at the dishwasher. FIGURE 36 41 4141414141 BOOSTER RECOVERY SYSTEM (PATENTED) - TWO TEMPERATURE SYSTEM WITHOUT RECIRCULATION ONE HW-300, HW-399, HW-420, HW-520, HW-610 OR HW-670 UP-FLOW MODEL COMMERCIAL BOILER WITH HORIZONTAL TANK + PIPING AND FITTINGS BETWEEN GATE VALVES AND BOILERS SHOULD BE DANGER BRASS OR BRONZE. OTHER PIPING SHOULD CONFORM TO LOCAL CODES. TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE TANK TEMPERATURE CONTROL WARNING ON PAGE 32. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. IMPORTANT THE INSTALLATION OF SAFETY FLOW SWITCH AS SHOWN IS REQUIRED TO PROTECT THE BOILER IN CASE OF WATER SERVICE INTERRUPTION OR CIRCULATOR FAILURE (A.O. SMITH PKG. NO. 211480). GATE VALVESARE SHOWN FOR SERVICING BOILER. HOWEVER, LOCAL CODES SHALL GOVERN THEIR USAGE. * PRESSURE RELIEF VALVE RATING SHOULD NOT EXCEED PRESSURE CAPACITY OF ANY COMPONENT IN THE SYSTEM. ** INSTALL THERMOMETER AND PRESSURE RELIEF IN OPENINGS PROVIDED ON HW-520, HW-610 & HW-670. USE THIS TABLE FOR CORRECT PUMPAND WATER PIPE SIZE Minimum B & G *Armstrong Model Pipe Size Pump Pump Number (Inches) Size Size HW-300 1-1/4" 125 S-25 1-1/4" HW-399 1-1/2" 1-1/2" HV H-32 1-1/2" HW-420 1-1/2" 1-1/2" HV H-32 1-1/2" HW-520 1-1/2" 1-1/2" HV H-32 1-1/2" HW-610/670 2" 2" S-35 WIRING - FIGURE 24 OR 26 INSTALL INACCORDANCE WITH ALL LOCAL CODES *Assumes 50 equivalent feet pf piping or less. FIGURE 37 42 4242424242 BOOSTER RECOVERYSYSTEM (PATENTED) TWO TEMPERATURE SYSTEM WITHOUT RECIRCULATION ONE HW-300, HW-399, HW-420, HW-520,HW-610 OR HW-670 UP-FLOW MODEL COMMERCIAL BOILER WITH VERTICAL TANK WIRING - FIGURE 24 OR 26 INSTALL INACCORDANCE WITH ALL LOCAL CODES DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE TANK TEMPERATURE CONTROL WARNING ON PAGE 32. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. IMPORTANT THE INSTALLATION OF SAFETY FLOW SWITCH AS SHOWN IS REQUIRED TO PROTECT THE BOILER IN CASE OF WATER SERVICE INTERRUPTION OR CIRCULATOR FAILURE (A.O. SMITH PKG. NO. 211480). + PIPING AND FITTINGS BETWEEN GATE VALVES AND BOILERS SHOULD BE BRASS OR BRONZE. OTHER PIPING SHOULD CONFORM TO LOCAL CODES. GATE VALVES ARE SHOWN FOR SERVICING BOILER. HOWEVER, LOCAL CODES SHALL GOVERN THEIR USAGE. * PRESSURE RELIEF VALVE RATING SHOULD NOT EXCEED PRESSURE CAPACITY OF ANY COMPONENT IN THE SYSTEM. ** INSTALL THERMOMETER AND PRESSURE RELIEF IN OPENINGS PROVIDED ON HW-520, HW-610 & HW-670. FIGURE 38 INSTRUCTIONS FOR NUMBERED CONTROLS SHOWN ABOVE 1 DUALTANK TEMPERATURE CONTROL 4 FLOW REGULATING PLUG COCK (For Boiler Flow Rate Adjustment) The dual tank temperature control should be installed in the lower of the two 3/4" thermostat openings in the tank. A slight closing of this valve may be necessary to set proper water flow rate for 40°F temperature rise through the boiler. Left Dial -High Limit Temperature rise is observed between the boiler inlet and Adjust to 160°F with 20°F differential (minimum). outlet thermometers. 5 FLOW REGULATING PLUG COCK Right Dial -Tank Temperature (For Dishwasher Recirculating Loop) Adjust to 140°F with 8°F differential (minimum). Close this valve just enough to divert sufficient flow into • May be adjusted slightly higher if total demand ofcirculating loop that will maintain 180°F at end of loop adjacent 180°F water requires higher tank temperature. to dishwasher when dishwasher is not drawing water. 2 LINE TEMPERATURE CONTROL 6 WATER PRESSURE REDUCING VALVE Install as close to boiler as possible. Do not insulate piping or Entering water pressure to the dishwasher must be set for 20 tee immediately adjacent to the control. psig flow pressure. Excessive flow pressure may waste rinse water beyond the capacity of the boiler to maintain it at 180°F Adjust dial to 185°F with 5°F differential (minimum). temperature. 7 INLET/OUTLET THERMOMETERS • May be set slightly higher if radiant loss fro...

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