valutazioni - 1, GPA: 3
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Be sure the power supply available (voltage, frequency, and phase) corresponds to that specified on the unit (230-60-1). 3. Check the electrical service provided by the utility for the building to be sure that the service capacity is sufficient to handle the load imposed by this unit. 4. Refer to the regulations of the serving gas supplier and the local building, heating, plumbing or other codes in. effect in the area in which installation is to be made. 5 . Refer to the dimensional drawing on page 2 for location of electrical, gas and chilled water connections prior to setting the unit in place. GENERAL Model 48-453, Series B, is a gas fired air-cooled absorption system which supplies chilled water to the cooling coil and is suitable for residential and small commercial air conditioning systems. This unit is used for cooling only with indoor or outdoor coil assemblies. The 48-453, Series B can also be used in conjunction with a Bryant gas-fired furnace to provide "allseasons" air conditioning for warm air or cool air as outside temperature dictates. Multiple Chillers and Cooling Coils When it is planned to connect two or more chillers or coils, additional piping and electrical information is required and should be obtained from your Bryant Distributor. I 39453D59 Rev 1 10/20/70 FILE COPY IÜOTI ÎREMOV Figure 1 • Model 453 Gas Air Conditioner When making multiple chiller installations, only 453, Series A and Series B can be interconnected. Do not manifold 453, Series A or Series B chillers with 36-453, Series C chillers. Operation at Atmospheric Pressure The chilled water tank on this unit is vented to the atmosphere; consequently, the chilled water circuit operates at atmospheric pressure .Therefore, conventional piping practices for a closed, pressurized system do not apply for this unit. NOTE: When the water chiller is piped to a boiler as described below, the indoor, coil operates at or near atmospheric pressure when used for cooling; it may be pressurized when it is used with the boiler for heating. When the chiller is piped with a boiler to form a combination heating and cooling -52 ELECTRICAL „ _ CONNECTIONS-i" TAPPED FOR 4021—^ CONDUIT * >^8 I ‘ i -MPT WATER _ 3_^ OUTLET 4 I, :rj * 8q" T -30- AIR OUT / ACCESS PANEL THIS SIDE -JMPT WATER INLET -G^S CONNECTION l^HOLE-^PIPE 3^. L !*ll|4*-12|*| k 2-1 Figure 2 - Unit Dimensional Drawing RATINGS, CAPACITIES and COMPONENT INFORMATION Gas Input BTUH 107,000 Power Supply (Voltage - Cycles - Phase) 230-60-1 Electrical Input KW 1.45 Condenser Air Flow CFM 4,200 Refrigerant Type R-717 Amount Lbs 11.4 Total Solution Lbs 30 Factory Test Pressure (Refrigerant Cycle) PSIG 450 Relief Valve Set (Refrigerant Cycle) PSIG 450 Operating Chiller Water Volume Gal. 3.8 Operating Chiller Water Level above Base Inches 9-5/8 Internal Chilled Water Pressure Loss Ft Water 2.5 Pressure in Chilled Water Tank PSIG *0 Nominal Chilled Water ‘El.ojp, Rate GPM 10 Water-Solution Pump Motor HP & Service Factor 1/2 - 1.6 Speed RPM 3450 Frame 48 Pulley Pitch Dia & Bore Inches 3.05 - .501 Water Pump Pulley Pitch Dia & Bore Inches 2.8 - .628 Solution Pump Pulley Pitch Dia & Bore Inches 6.8 - .626 Belt Length & Width Inches 36 x 1/2 Fan Motor HP 1/3 Speed RPM 825 Frame 48 Fan Diameter Inches 26 Unit Weight Lbs 7.40 * Atmospheric 48/453 - 2 - LIQUID SUCTION HEAT EXCHANGER CONTROL BOX SERVICE M VALVE D - PUMP INLET TANK SERVICE VALVE E PUMP DISCHARGE J TANK SERVICE VALVE C RECTIFIER CHILLER TANK SUCTION'' DISCHARGE' HYDRAULIC PUMP/ VALVE VALVE WATER PUMP MOTOR FAN FAN MOTOR if NONCONDENS-ABLE CUSHION HYDRAULIC PUMP CHILLED WATER ADDITIVE Figure 3 — Partially Disassembled Unit (Front View) SERVICE LIMIT VALVE A SWITCH \ CAPACITOR SERVICE LIMIT VALVE A SWITCH ABSORBER/ CONDENSER'. ASSY. SAIL SWITCH /821 RELAY / / RESISTOR j; ■ "-v*ss; v . ¡y /PART L0AD kk/U .///CONTROL m AUX. .. Rr* /RELAY SOLUTION COOLED ABSORBER A643 GAS VALVE f / //! -■V ! LOW-VOLTAGE ->>'TERM. BLOCK ! MANUAL ^----RESET , BUTTON —^-GENERATOR PILOT ADJUSTING SCREW ’c'_____p "W~ ~ GAS INLET CONNECTION PILOT PRESSURE SWITCH BURNER ''PILOT ASSEMBLY CAPACITOR SAIL SWITCH j 821 RELAY RESISTOR PART LOAD /CONTROL /AUX. ' / RELAY 'low-voltage TTERM. BLOCK MANUAL RESET BUTTON GENERATOR COMBINATION REGULATOR/ SHUT-OFF VALVE / GAS VALVE GAS INLET VALVE PILOT BURNER ASSEMBLY CONNECTION ADJUSTABLE SCREW Figure 4A — Partially Disassembled Unit (Lett Side) Figure 4B — Partially Disassembled Unit (Left Side) Equipped with A643 Gas Valve Equipped with A639 Gas Valve . _ 48/453 system, provisions must be made for a positive shut-off between the chiller tank and the boiler. When the boiler is in operation, the chiller tank must be by-passed. A sediment strainer must be installed at the chiller tank inlet when a common pipe connects the chiller tank and boiler. When the chiller is in operation,...