Sanyo DE User Manual download pdf (Page 23)

ENVIRONMENTALLY FRIENDLY TECHNOLOGY SUPER ABSORPTION

1. Equipment and parts outside the area surrounded by the broken line

are not supplied by SANYO.

2. Refer to the “Dimensions” for pipe connections and diameters.

3. Determine the locations of the chilled/hot water pumps, cooling

water pump and expansion tank in due consideration of the pump’s

hydrostatic head.

The chiller/heaters should not, as standard condition, be subject to a

pressure larger than 784kPa (8 kg/cm

G) at any water headers.

4. Concerning the temperature control of cooling water, refer to the

section of “control method of cooling water temperature”.

5. The chilled/hot and cooling water pumps should preferably be

provided 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 of

the chilled/hot and cooling water pipe connections.

8. Provide an air vent valve in each of the chilled/hot and cooling water

lines at a point higher than each header.

9. Lay pipes from the cover of the evaporator, absorber and smoke

chamber to the drain ditch.

General remarks on piping work

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 the

evaporator, absorber and condenser, to facilitate inspection and

cleaning work.

13.Provide heat insulation to the flue, which should be equipped with a

damper 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 device

has to be provided to prevent the flow of exhaust gas into the one

which is out of operation.

16.The exhaust discharge end of the flue should be kept a sufficiently

large distance away from the cooling tower.

17.Provide a draft regulator if the static pressure inside the flue is

subject to fluctuations.

18.Fix the rupture disk on the chiller/heaters according to the manual of

rupture disk, if necessary.

19.All external water piping with JIS 10k welding flanges are to be

provided by the customer.

Typical piping diagram (DE)

Figure 32. Typical piping diagram

P T

Air conditioner Expansion tank

Chiller / hot

water pump

(secondary)

Chilled / hot

water pump

(primary)

By-pass valve

Supply

header

Return

header

Cooling water pump

To drain ditch

Fuel

Air vent

Flue

Water supply

: Thermometer

COOLING

TOWER

HC C

Tank

above

: Pressure gauge

: Flow meter

: Water pump : Strainer

: Valve

: Thermostat

In order to prevent freezing up of chilled water when the chiller/heaters

get a stop signal, continue the operation of the primary and secondary

chilled/hot water pumps and air conditioner during dilution cycle

operation of the chiller/heaters.

(about 15 minutes).

Cooling cycle schematic

Figure 33. Steam-fired chillers



Condenser



Low Temperature

Generator



Low Temperature

Heat Exchanger



Cooling Water



Chilled Water



Absorber



Evaporator



Cooling Water



High Temperature

Generator



Steam



SteamTrap



Steam Drain



High Temperature

Heat Exchanger



Heat Reclaimer



Refrigeration capacity 1.2

Heat 1.0

Chilled water

Steam

Liq. refrigerant

Vap. refrigerant

Cooling water

Heat sink 2.2

Dil. solution

Int. solution

Conc. solution

Steam-fired chillers

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Sanyo DE User Manual Page 23

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