Typical piping diagram (DE)

Steam-fired chillers

Figure 32. Typical piping diagram

Air conditionerExpansion tank Chiller / hotwater pump (secondary)Chilled / hotwater pump (primary)By-pass valve COOLINGTOWER HCC P T F P T P T P T Tankabove1M SupplyheaderReturnheader 3 Cooling water pumpTo drain ditchFuelAir vent FlueWater supply T: Thermometer P: Pressure gauge F: Flow meter : Water pump: Strainer : Valve : Valve : Thermostat

Cooling cycle schematic

In order to prevent freezing up of chilled water when the chiller/heatersget a stop signal, continue the operation of the primary and secondarychilled/hot water pumps and air conditioner during dilution cycleoperation of the chiller/heaters. (about 15 minutes).

Figure 33. Steam-fired chillers

É¹ Heat sink manufacturers 2.2 Heat 1.0 É¹ É¹ Steam É¹ É¹ Low Temperature É¹

General remarks on piping work

É¹ High Temperature É¹ Cooling Water Condenser Generator Generator

1.Equipment and parts outside the area surrounded by the broken lineare not supplied by SANYO.2.Refer to the “Dimensions” for pipe connections and diameters.3.Determine the locations of the chilled/hot water pumps, coolingwater pump and expansion tank in due consideration of the pump’s hydrostatic head.The chiller/heaters should not, as standard condition, be subject to apressure larger than 784kPa (8 kg/cm 10.Provide expansion tank in the chilled/hot water line.11.Provide a bleeder in the cooling water line for control of water quality. 12.There should be a sufficiently large clearance for easy access to theevaporator, absorber and condenser, to facilitate inspection andcleaning work.13.Provide heat insulation to the flue, which should be equipped with adamper and condensate drain.14.Do not connect the flue to the smoke stack of an incinerator. 15.When one flue is used for two or more chiller/heaters, a devicehas to be provided to prevent the flow of exhaust gas into the onewhich is out of operation.16.The exhaust discharge end of the flue should be kept a sufficientlylarge distance away from the cooling tower.17.Provide a draft regulator if the static pressure inside the flue issubject to fluctuations.18.Fix the rupture disk on the chiller/heaters according to the manual ofrupture disk, if necessary.19.All external water piping with JIS 10k welding flanges are to beprovided by the customer.

É¹ Chilled Water É¹É¹ É¹ É¹
2

G) at any water headers.4.Concerning the temperature control of cooling water, refer to thesection of “control method of cooling water temperature”.5.The chilled/hot and cooling water pumps should preferably beprovided exclusively for each chiller/heaters.6.During heating operation, cooling water must be discharged.7.Provide a thermometer and pressure gauge at the outlet and inlet ofthe chilled/hot and cooling water pipe connections.8.Provide an air vent valve in each of the chilled/hot and cooling waterlines at a point higher than each header.9.Lay pipes from the cover of the evaporator, absorber and smokechamber to the drain ditch.

High Temperature É¹ Heat Exchanger É¹ SteamTrap É¹ É¹ É¹ Heat Reclaimer Steam Drain Evaporator É¹ Low Temperature É¹ Absorber É¹ Heat Exchanger Cooling Water Refrigeration capacity 1.2 Dil. solutionInt. solutionConc. solution Liq. refrigerant Vap. refrigerant Cooling water Chilled water
Steam

4243