Hitachi Absorption Chiller-Heaters

Transcription

1 GasFired/OilFired Hitachi bsorption ChillerHeaters 5273,516 ( USRT) EXH Series: HighEfficiency bsorption ChillerHeaters [COP=1.43 (Gas), COP=1.40 (Oil)] 5273,516 ( USRT) EXS Series: MiddleEfficiency bsorption ChillerHeaters [COP=1.36 (Gas)] 4223,516 (120 USRT) V Series: Standard Efficiency bsorption ChillerHeaters [COP=1.12 (Gas, Oil)]

2 Hitachi Developed NextGeneration EX Series bsorption ChillerHeaters to Realize High Efficiency by Fully Utilizing Creativity and dvanced Technologies (*1) World's Highest Level COP 1.43 The movement to restrict the emission of greenhouse in order to prevent global warming is spreading worldwide. Because air conditioning systems account for a large portion of the energy consumed in buildings and factories, energy saving in air conditioning equipment plays an important role in cutting the emission of greenhouse. Utilizing the cooling and heating technology and knowhow which have been cultivated for many years, Hitachi developed a new and ful model of highefficiency absorption chillerheater that is suited to saving energy and cutting energy costs for air conditioning systems, and achieved the world's highest level COP 1.43 (*1). *1 EXH series ( fired type, chilled temperature specification: 15 C7 C) 2stage evaporation and absorption cycle High efficiency was achieved by employing a 2stage evaporation and absorption cycle. By dividing the evaporation and absorption cycle into two (upper and lower) stages and running the lowerstage evaporation and absorption cycle in the ranges of 15 C to 11 C chilled temperature and 32 C to 34.5 C cooling temperature, the concentration of solution can be lowered to the same as that of light load operation. s a result, the concentration difference between and absorber can be increased and the flow rate of circulating absorbent in the whole cycle can be reduced. Thus we succeeded in increasing cycle efficiency by reducing the flow rate of circulating solution, which in turn cuts not only the heat radiation loss that results from the cooling 's heat deprivation, but also the heat (fuel) that is used for heating in the hightemperature. Highefficiency plate heat exchanger Lowand hightemperature solution heat exchangers are important elements that have a great influence on the efficiency of the absorption chillerheater. We employed plate heat exchangers of welded construction that are high in efficiency and can easily be miniaturized and connected to keep flow velocity at an optimum level even when the flow rate of circulating solution is low. Thus we succeeded in achieving high efficiency and compact size at the same time. Drain heat exchanger World's highest level of efficiency realized (COP 1.43* 1 ). Best suited for saving energy and cutting energy costs of air conditioning systems. The longer the annual operating time, the higher the effect of cutting running cost. Contributes to cutting emission of greenhouse. dapted for heavy load operation as standard. 7 C Intermediate 11 C 15 C 1 st stage evaporator Refrigerant 2 nd stage evaporator 1 st stage absorber Solution From 37 C Chooling Intermediate 34.5 C 32 C Weaker solution to 2 nd stage absorber 2 stage evaporation and absorption cycle flow diagram The drain heat exchanger exchanges heat between the warm refrigerant that is returned from the lowtemperature and the cool solution that comes from the absorber and thus preheats the solution that is sent to the hightemperature. (Equipped with EXH series only.) Parallel FlowSystem Greatly Contributes to Miniaturization, Energy Saving and Higher Safety The Parallel Flow System divides the flow of weak solution coming out of the absorber in two at the outlet of the solution circulation Parallel flow system Series flow system pump and pressurefeeds them separately to the high and lowtemperature s. Because this system feeds solution separately to the high and low temperature s, it is unnecessary to arrange the hightemperature on an elevated place. s a result, it becomes possible to arrange the hightemperature at a lower part of the chillerheater main unit, which greatly contributes to downsizing. On the other hand, the conventionally used Series Flow System feeds the all the weak solution at once to hightemperature and then feeds concentrated solution to the lowtemperature, which requires the hightemperature to be located on an elevated place. s a result, it is inevitable that the whole unit becomes slightly larger in size. The parallel flow system contributes not only to miniaturization but also to safety and maintainability. The parallel flow system technology has proven its high reliability over a long history of more than 30 years since Hitachi developed the double effect absorption chiller. 1. Low internal pressure during operation The internal pressure of the hightemperature depends on the concentration of lithium bromide in the lowtemperature. With the parallel flow system, the weakest solution coming out of the absorber is fed to the lowtemperature, so that it is possible to keep bsorber Lowtemperature Lowtemperature Hightemperature Weakest solution the internal pressure of the hightemperature considerably lower than atmospheric pressure. s a result, the system can be operated in a cycle with a sufficient margin with respect to atmospheric pressure. 3. Energy saving Because the parallel flow system divides the flow of solution in two to feed the two s (hightemperature and lowtemperature ) with solution, the quantity of solution that is handled in the solution heat exchangers can be almost halved. Therefore, it is possible to greatly save energy by using a small heat exchangers. s a result, an additional energy saving effect can be realized with an uncomplicated reasonable design. Solution heat exchanger Hightemperature 2. Because of its compact size, the whole unit can be carried in at once Because it is unnecessary to feed solution from the high to lowtemperature, the hightemperature can be arranged diagonally beneath the main unit shell. This results in a smaller width of the whole unit. Therefore, the unit can be carried in and installed without being divided into pieces. 4. Stability and high reliability dvantages of parallel flow system Parallel flow Low internal pressure of hightemperature Low flow rate of circulating solution hightemperature internal pressure can be lowered Low internal temperature of hightemperature The quantity of heat required to maintain the temperature of the hightemperature is small Miniaturization is possible with a reasonable layout Lowtemperature Main unit shell Hightemperature Pump The concentration of solution at the absorber inlet where the temperature is lowest is lower with a parallel flow system than with a series flow system, and sufficiently distant from the limit of crystal precipitation (the limit for solution to crystallize). Therefore, the system operates safely with no anxiety of crystallization. Because of its compact size, the whole unit can be carried in at once without being divided into pieces. Therefore, the reliability proved by strict air tightness test in the fabrication plant is not degraded. Internal pressure does not exceed atmospheric pressure Sufficient margin for dirtiness of cooling tube Safety with respect to corrosion Energy saving is possible Carrying in as a unit is possible Highly reliable degree vacuum

3 Large Differential SystemSaves Energy and Facilities of Total ir Conditioning System ir conditioning accounts for 1/3 to 1/2 of the energy consumed in office buildings, and the quantity of ventilation air and feed required per unit of air conditioning area is steadily increasing due to spread of O and increase of the cooling load. How to cut the required for conveying fluid in air conditioning systems in order to save energy consumed in office buildings is an important subject. The Large Differential ir Conditioning System is an epochmaking air conditioning technology that Hitachi developed and put to practical use for the purpose of achieving drastic energy saving without special additional devices. Fine control realizes efficient and energysaving operation Hitachi absorption chillerheaters are distinguished not only by their energy saving effect under rated conditions but also by a high energy saving effect under partial loads. Its energy saving effect is available also in winter and intermediate seasons when cooling temperature is low. Besides, due to the unique solution circulating flow control developed by Hitachi, they operate stably in a whole range from high to low load conditions. The figure below shows a sample relational curve between cooling capacity (%) and fuel consumption (%). Features of large temperature differential air conditioning system Large temperature differential system tower Smaller capacity tower Large t Conventional system Lower bsorption chillerheater Lower flow rate and smaller size piping bsorption chillerheater Large t Fan Fan ir Large temperature differential air conditioner ir /hot Coil * 38.7 C for EXH series 38.9 C for EXS series The absorption central system connects the air conditioner, absorption chillerheater and cooling tower by piping and ducts and controls room temperature according to the temperature of the and air that circulate through them. The large temperature differential system increases the temperature difference between outgoing and returning chilled to reduce the flow rate of circulating while increasing the cooling outlet temperature to make the temperature difference larger, for the purpose of cutting the amount of required for conveying cooling. Fuel consumption (%) ir conditioner Large temperature differential technology for absorption chiller It is comparatively easy to increase the temperature difference in a chilled system. On the other hand, to increase the temperature difference in a cooling system, it is inevitable that the chiller be larger in size because a onerank larger absorption chiller needs to be employed. For this reason, large temperature differential technology is rarely applied. Utilizing its unique technologies, Hitachi succeeded in achieving a large temperature difference in both chilled and cooling systems without resulting in an increase in the unit's size. Effects flow:bsorbercondenserbsorber bsorber Evaporator Outlet Solution circuration pump The driving of chilled and cooling pumps can be cut by employing a large temperature differential system. Sample Comparison of uced Pump (Standard Differential Specification:) V series : C flow employed inlet inlet *Trial calculation for 0RT V series (Pump head was assumed to be 25 m) Outlet Condenser Lowtemperature Solution heat exchanger Cilled Hightemperature Burner Standard 127 Large temperature differential 157 EX series : 2stage evaporation and absorption cycle 7 (Intermediate) 1 st stage evaporator 15 Standard 323 Refrigerant 2 nd stage evaporator : : : 63 : 1 st stage absorber from Solution 2 nd stage absorber 38.7 (Intermediate) 32 Weaker solution to The flow rate of chilled and cooling can be reduced by employing the large temperature differential system. (in case of V series) Large temperature differetial : 63 :74 Protective maintenance and abnormality prediction items 1. supercooling preventive function 2. Load limiting control 3. Purge frequency abnormality 4. Solution overconcentration prevention control capacity (%) Optimal control of dilution operation time contributes to energy saving in the whole system Solution diluting operation time before stopping the chillerheater is calculated and controlled by microcomputer to optimize stop time. s a result, the operating time of the pump and cooling tower during dilute operation can be reduced, making it possible to save energy in the whole system. dapted for heavy load operation (annual operating time of 4,000 hours or more) as standard In addition to the 2stage evaporation and absorption cycle (EXH and EXS series) and C flow (V series), a parallel flow system is employed to realize a lowconcentration cycle. Even under loads as heavy as 4,000 hours of annual cooling operation time, you can operate the system at high reliability without worry. Safe operation assured by reinforced protective maintenance and abnormality prediction functions Protective maintenance and abnormality prediction functions are incorporated to assure efficient and stable operation. 5. temperature abnormality 6. Dirty cooling tube 7. Dirty hightemperature tube 8. Refrigerant supercooling preventive control Standard temperature difference Large temperature difference only for chilled Large temperature difference for both chilled and cooling

4 Large temperature differential chilled 15 7 C / C Heating capacity Hot capacity fired Capacity ( Hz) Oil burner fan Oil injection pump fired Oil preheater Consumption / Heating Consumption / Heating RT / Mcal/h / Mcal/h / C C C KV KV L/h EXH / / / 363 CV, Hz / / ,000 x 2, x 2, / 7.9 EXH / 4 4 / / Inlet: 54.7 C (), 54.5 C ( fired), Outlet: 60 C CV, Hz / / ,000 x 2, x 2, / 10.3 EXH EXH / 1,055 / 1,2 605 / / 4 3 / / Inlet: 3 C, Outlet: 37.0 C CV, Hz / / , x 2, x 2, / 12.1 CV, Hz / /.6 4,7 x 2,070 x 3, 16.4 / 14.8 EXH / 1,407 8 / / 9 CV, Hz +.6 / / ,7 x 2,070 x 3, 16.4 / EXH 4 / 1,2 908 / 1, / 1, CV, Hz / / ,0 x 2,140 x 3, 20.1 / EXH 0 / 1,7 1,009 / 1,173 1,038 / 1, CV, Hz / / ,0 x 2,140 x 3, 20.1 / 18.3 EXH / 1,969 1,098 / 1,277 1,1 / 1,351.0 CV, Hz / / ,190 x 2, x 3, 25.1 / 22.9 EXH / 2,215 1,236 / 1, / 1, Inlet: 3 C, Outlet: 37.0 C (EXH~EXH), 37.8 C (0EXH) Inlet: 54.7 C (), 54.5 C ( fired), Outlet: 60 C CV, Hz / / ,190 x 2, x 3, 25.1 / 22.9 EXH 7EXH / 2,461 7 / 2,637 1,373 / 1,597 1,514 / 1,760 1,4 / 1,690 1,557 / 1,0 CV, Hz / / ,0 x 2,470 x 3, 27.7 / CV, Hz / / ,670 x 2, x 3, 28.9 / 26.3 COP=1.43 ( fired), COP=1.40 ( fired) 0EXH 0 / 2,3 1,615 / 1,878 1,0 / 1,930 CV, Hz / / ,170 x 2, x 3, 30.7 / 27.9 EXH / 3,1 1,7 / 2,113 1,8 / 2, CV, Hz / / ,170 x 2, x 3, 33.3 / EXH / 3,516 2,019 / 2,348 2,075 / 2, CV, Hz / / ,170 x 2,790 x 3, 3 / 34.2 Standard temperature differential chilled 12 7 C / C Heating capacity Hot capacity fired Capacity ( Hz) Oil burner fan Oil injection pump fired Oil preheater Consumption / Heating Consumption / Heating RT / Mcal/h / Mcal/h / C C C KV KV L/h EXH / / / CV, Hz / / ,000 x 2, x 2, / 7.9 EXH / 4 2 / 5 6 / Inlet: 56.6 C (), 56.5 C ( fired), Outlet: 60 C.2 CV, Hz / / ,000 x 2, x 2, / 10.3 EXH EXH / 1,055 / 1,2 614 / / / / 3 Inlet: 1 C, Outlet: 7.0 C Inlet: 3 C, Outlet: 37.0 C CV, Hz / / , x 2, x 2, / CV, Hz / / ,7 x 2,070 x 3, 16.4 / 14.8 EXH / 1,407 9 / / CV, Hz / /.2 4,7 x 2,070 x 3, 16.4 / EXH 4 / 1,2 922 / 1,0 9 / 1, CV, Hz / / ,0 x 2,140 x 3, 20.1 / EXH 0 / 1,7 1,024 / 1,190 1,054 / 1, CV, Hz +.5 / / ,0 x 2,140 x 3, 20.1 / 18.3 EXH / 1,969 1,146 / 1,333 1,1 / 1,373 EXH EXH / 2,215 / 2,461 1,290 / 1,0 1,433 / 1, / 1,544 1,476 / 1,716 Inlet: 1 C, Outlet: 7.0 C Inlet: 3 C, Outlet: 37.0 C (EXH~EXH), 37.8 C (0EXH) Inlet: 56.6 C (), 56.5 C ( fired), Outlet: 60 C CV, Hz / / ,190 x 2, x 3, 25.1 / CV, Hz / / ,190 x 2, x 3, 25.1 / 22.9 CV, Hz / / ,0 x 2,470 x 3, 27.7 / EXH 7 / 2,637 1,6 / 1,7 1,2 / 1, CV, Hz / / 1.8 8,670 x 2, x 3, 28.9 / 26.3 COP=1.41 ( fired), COP=1.38 ( fired) 0EXH 0 / 2,3 1,638 / 1,904 1,7 / 1, CV, Hz / / ,170 x 2, x 3, 30.7 / 27.9 EXH 0EXH / 3,1 / 3,516 1,2 / 2,142 2,047 / 2,3 1,8 / 2,207 2, / 2,451 Inlet: 13.0 C, Outlet: 7.0 C Inlet: 56.0 C (), 55.8 C ( fired), Outlet: 60 C CV, Hz / / ,170 x 2, x 3, 33.3 / CV, Hz / / ,170 x 2,790 x 3, 3 / 34.2 Notes: 1. 1 of refrigeration (1 USRT) is (3,024 kcal/h). 2. and hot temperatures mean the corresponding temperature conditions during cooler or heatermode operation. 3. Fouling factor is m 2 k/w ( m 2 h C/h) for chilled, hot and cooling. 4. Maximum working pressure is normally 7 (8kg/cm 2 G) for chilled, hot and cooling. 5. Capacity control range under standard specification (capacity, chilled, cooling, etc.) is % to 25% for fired type (proportional control) and % to 40% for oil fired type (3position control). 6. The heat value of fuel is as follows: : [LHV] 41, kj/m 3 N (9,0 kcal/m 3 N), [MHV] 46,000 kj/m 3 N (1 kcal/m 3 N) : [LHV] 36,290 kj/m 3 N (8,670 kcal/l) 7. The sulfur value of diesel oil is less than 0.5 vol.%.

5 Large temperature differential chilled 15 7 C / C Hot capacity Heating capacity Outlet Capacity( Hz) Consumption Heating RT Mcal/h C C C KV EXS CV, Hz ,000 x 2, x 2, / 7.4 EXS CV, Hz ,000 x 2, x 2, / 9.9 EXS EXS 1,055 1, Inlet: 3 C, Outlet: 37.2 C.0 Inlet: 54.4 C, Outlet: 60 C CV, Hz , x 2, x 2, / 1 CV, Hz ,7 x 2,070 x 3, / 14.0 EXS 1, CV, Hz ,7 x 2,070 x 3, / EXS 4 1, , CV, Hz ,0 x 2,140 x 3, 19.1 / EXS 0 1,7 1,061 1, CV, Hz ,0 x 2,140 x 3, 19.1 / 17.3 EXS 1,969 1,1 1,382.0 CV, Hz ,190 x 2, x 3, 2 / 21.6 EXS 2,215 1,337 1, Inlet: 3 C, Outlet: 37.2 C (EXS~EXS), 38.0 C (0EXS) CV, Hz ,190 x 2, x 3, 2 / 21.6 EXS 7EXS 7 2,461 2,637 1,486 1,592 1,8 1, Inlet: 54.4 C, Outlet: 60 C CV, Hz ,0 x 2,470 x 3, 26.1 / CV, Hz ,670 x 2, x 3, 27.4 / EXS 0 2,3 1,698 1, CV, Hz ,170 x 2, x 3, 29.0 / 26.3 EXS 3,1 1,910 2, CV, Hz ,170 x 2, x 3, 31.3 / 28.3 COP=1.36 ( fired) 0EXS 3,516 2,123 2, CV, Hz ,170 x 2,790 x 3, 3 / 32.3 Standard temperature differential chilled 12 7 C / C Hot capacity Heating capacity Outlet Capacity( Hz) Consumption Heating RT Mcal/h C C C KV EXS CV, Hz ,000 x 2, x 2, / 7.4 EXS CV, Hz ,000 x 2, x 2, / 9.9 EXS EXS 1,055 1, Inlet: 1 C, Outlet: 7.0 C Inlet: 3 C, Outlet: 37.2 C.0 Inlet: 56.5 C, Outlet: 60 C CV, Hz , x 2, x 2, / 1 2 CV, Hz ,7 x 2,070 x 3, / 14.0 EXS 1, CV, Hz ,7 x 2,070 x 3, / 14.0 Notes: 1. 1 of refrigeration (1 USRT) is (3,024 kcal/h). 2. and hot temperatures mean the corresponding temperature conditions during cooler or heatermode operation. 3. Fouling factor is m 2 k/w ( m 2 h C/h) for chilled, hot and cooling. 4. Maximum working pressure is normally 7 (8kg/cm 2 G) for chilled, hot and cooling. 5. Capacity control range under standard specification (capacity, chilled, cooling, etc.) is % to 25% for fired type (proportional control). 6. The heat value of fuel is as follows: : [LHV] 41, kj/m 3 N (9,0 kcal/m 3 N), [MHV] 46,000 kj/m 3 N (1 kcal/m 3 N) 7. Please contact us for oil fired EXS series. 4EXS 4 1, , CV, Hz ,0 x 2,140 x 3, 19.1 / EXS 0 1,7 1,071 1, CV, Hz ,0 x 2,140 x 3, 19.1 / 17.3 EXS 1,969 1,199 1, CV, Hz ,190 x 2, x 3, 2 / 21.6 EXS EXS 2,215 2,461 1,3 1,9 1,569 1,743 Inlet: 1 C, Outlet: 7.0 C Inlet: 3 C, Outlet: 37.2 C (EXS~EXS), 38.0 C (0EXS) Inlet: 56.5 C, Outlet: 60 C CV, Hz ,190 x 2, x 3, 2 / 21.6 CV, Hz ,0 x 2,470 x 3, 26.1 / EXS 7 2,637 1,606 1, CV, Hz ,670 x 2, x 3, 27.4 / EXS 0 2,3 1,713 1, CV, Hz ,170 x 2, x 3, 29.0 / 26.3 COP=1.35 ( fired) EXS 0EXS 3,1 3,516 1,927 2,142 2,241 2,0 Inlet: 13.0 C, Outlet: 7.0 C Inlet: 56.0 C, Outlet: 60 C CV, Hz ,170 x 2, x 3, 31.3 / CV, Hz ,170 x 2,790 x 3, 3 / 32.3

6 Large temperature differential chilled 15 7 C / 32 3 C Hot capacity Capacity ( Hz) Oil burner fan Oil injection pump Oil preheater Consumption / Heating Consumption / Heating RT Mcal/h C C C KV KV L/h 120V CV, Hz / / ,023 x x 6.0 / 5.6 V CV, Hz / / ,170 x x 6.4 / 5.9 Standard temperature differential chilled 12 7 C / 32 3 C Hot Heating capacity fired capacity Heating capacity Capacity ( Hz) Oil burner fan Oil injection pump fired Oil preheater Consumption / Heating Consumption / Heating RT Mcal/h C C C KV KV L/h 120V CV, Hz / / ,023 x x 6.0 / 5.6 V CV, Hz / / ,170 x x 6.4 / 5.9 1V V V Inlet: 3 C, Outlet: 3 C Inlet:.2 C, Outlet: 60 C.0 CV, Hz / / ,5 x x 7.9 / CV, Hz / /.7 4,144 x x 8.2 / CV, Hz / / ,144 x x 8.9 / 8.2 1V V V Inlet: 1 C, Outlet: 7.0 C Inlet: 3 C, Outlet: 3 C Inlet: 55.7 C, Outlet: 60 C.9 47 CV, Hz / / CV, Hz / /.7 3,5 x x 4,144 x x 7.9 / / 7.6 Notes: 1. 1 of refrigeration (1 USRT) is (3,024 kcal/h). 2. and hot temperatures mean the corresponding temperature conditions during cooler or heatermode operation. 3. Fouling factor is m 2 k/w ( m 2 h C/h) for chilled, hot and cooling. 4. Maximum working pressure is normally 7 (8kg/cm 2 G) for chilled, hot and cooling. 5. Capacity control range under standard specification (capacity, chilled, cooling, etc.) is % to 25% for fired type (proportional control) and % to 40% for oil fired type (3position control). 6. The heat value of fuel is as follows: : [LHV] 41, kj/m 3 N (9,0 kcal/m 3 N), [MHV] 46,000 kj/m 3 N (1 kcal/m 3 N) : [LHV] 36,290 kj/m 3 N (8,670 kcal/l) 7. The sulfur value of diesel oil is less than 0.5 vol.%..2 CV, Hz / / ,144 x x 8.9 / 8.2 2V CV, Hz / / ,944 x 1,9 x 2, / V CV, Hz / / ,944 x 1,9 x 2, / V 330 1, CV, Hz / / 10 4, x 1,9 x 2, / V 330 1, CV, Hz / / 10 4, x 1,9 x 2, / 10.9 V 1, ,078 CV, Hz / / , x 2,440 x 2, / 12.7 V 1, , CV, Hz / / , x 2,440 x 2, / 12.7 V 1,407 1,030 1, CV, Hz /.2.2 /.2 4, x 2,440 x 2, / 13.1 V 1,407 1,030 1, CV, Hz /.2.2 /.2 4, x 2,440 x 2, / V 4 1,2 1,159 1, CV, Hz / / , x 2,4 x 2, / V 4 1,2 1,159 1, CV, Hz / / , x 2,4 x 2, / V 0 1,7 1,2 1, CV, Hz / / , x 2,4 x 2,940 1 / V 0 1,7 1,2 1, CV, Hz / / , x 2,4 x 2,940 1 / 15.4 V V 1,969 2,215 1,442 1,3 1,677 1,7 90 Inlet: 3 C, Outlet: 3 C Inlet:.2 C, Outlet: 60 C CV, Hz / / , x 2,4 x 3,040 2 / CV, Hz / / , x 2,4 x 3,040 2 / 19.0 V V 1,969 2,215 1,442 1,3 1,677 1,7 Inlet: 1 C, Outlet: 7.0 C Inlet: 3 C, Outlet: 3 C Inlet: 55.7 C, Outlet: 60 C 64 CV, Hz / / , x 2,4 x 3,040 2 / CV, Hz / / , x 2,4 x 3,040 2 / 19.0 V 2,461 1,3 2,096 CV, Hz / / , x 3,340 x 3,4 3 / 28.5 V 2,461 1,3 2,096 CV, Hz / / , x 3,340 x 3,4 3 / 28.5 COP=1.12 ( fired, fired) 0V 0 2,3 2,060 2, CV, Hz / / 25 6, x 3,340 x 3, / V 0 2,3 2,060 2, CV, Hz / / 25 6, x 3,340 x 3, / 31.7 V 3,1 2,318 2, CV, Hz / / 2.7 7, x 3,340 x 3, / 37.7 V 3,1 2,318 2, CV, Hz / / 2.7 7, x 3,340 x 3, / V 3,516 2,575 2, CV, Hz / / , x 3,340 x 3, / 38.1 COP=1.12 ( fired, fired) 0V 3,516 2,575 2, CV, Hz / / , x 3,340 x 3, / 38.1

7 EXH / EXS series L (max) W (max) H (max) Control panel The microcomputerequipped controller panel with improved operability and maintainability supports speedy and accurate operation control. 1. Greatly improved load fluctuation followup characteristics change is rapidly detected by means of PID compensation to quickly control thermal. Load fluctuation followup capability is greatly improved to adapt to advanced air conditioning systems for buildings. 2. Easytosee indicators support accurate operation control Reinforced display items, including operating conditions and error information, enable you to easily and accurately grasp the machine's condition. 3. Safe operation backed up by preventive maintenance and abnormality prediction functions. The incorporated preventive maintenance and abnormality prediction functions assure efficient and stable operation. Indicator color Name indicator lamp Combustion Indicator lamp Safety circuit Indicator lamp bnormality Indicator lamp Run indicator lamp Stop indicator lamp Name Remote/local mode Indicator lamp Indicator coler Yellow Orange Green But color Indication/set Run Stop Name Cooler/heater mode changeover Remote/local mode changeover Forced dilution Buzzer stop Reset Indicator coler Green EXH / EXS series dimensions EXH / EXS series L W H 3,000 2, 2,419 4,000 2, 2,419 4, 2, 2,419 4,7 2,070 3, 4,7 2,070 3, 4 5,0 2,140 3, 0 5,0 2,140 3, 7,190 2, 3, 7,190 2, 3, 7,0 2,470 3, 7 8,670 2, 3, ( unit: ) 0 0 9,170 10,170 11,170 2, 3, 2, 3, 2,790 3, Gearlink and interlocking mechanisms For correct and safe operation, it is recoended that you interlock your Hitachi absorption chillerheater with the chilled/hot pump, the cooling pump and the cooling tower fan (thus sequentially starting up and stopping them). ll operations must be performed on the chiller side, and operating sequence and contact transfer shall be determined according to the following diagram. Gearlink Gearlink /hot pump ir conditioner V series L (max) W (max) Chillerheater Interlock ND (Note 2) Gearlink (Note 3) ND pump tower Interlock Other Interlock (Seimoscope, abnormal room temperature rise, leakage detector, ventilating fan, etc.) Other Gearlink (ventilating fan) Caution: (1) lways gearlink chilled/hot pump and cooling pump from the chiller. (2) When only one unit of air conditioner is used, it is necessary to interlock the air conditioner. (3) Gearlink should be implemented so that if the chilled/hot pump stops the cooling pump also stops. (4) means that this facility needs not be operated in heater mode. External connection terminals Detail of remote start/stop signals Detail of external connection terminals External connection terminal specifications V series dimensions V series L 3,030 3,170 3,0 4, 4, 2 4, ,9 4, 4, 4 4, 0 4, 5, 5, 6, 0 6, ( unit: ) 0 7, 7, H (max) ncillary facility panel (out of the scope of Hitachi supply) For remote start (Novoltage level start/stop) (Standard) Remote start For remote start (Novoltage pulse start/stop) (Option) Remote start Remote stop For remote start (DC24V pulse start/stop,nonpolar) (Option) Coon Remote start Remote stop bsorption chillerheater control panel (within the scope of Hitachi supply) Coon Coon Coon Terminal block Terminal block Terminal block ncillary facility panel (out of the scope of Hitachi supply) Operation interlock (chilled/hot pump) Continuous monitoring interlock pump interlock Combusion monitor interlock Emergency failure interlock Fuel limit Coon Remote start/stop signal Earth bsorption chillerheater control panel (within the scope of Hitachi supply) Terminal block Terminal block Chillerheater control panel External terminal External Chillerheater control panel Specification Resistive load 220VC 2/ 24VDC 2 Inductive load 220VC 0.5 /24VDC 1 DC24V 6.7m Max. coon current 8 W 1,990 1,990 2,440 2,440 2,4 2,4 2,4 2,4 3,340 3,340 3,340 3,340 H 2,2 2,2 2,6 2,6 2,940 2,940 3,040 3,040 3,4 3,4 3,4 3,4 Out of the above can be selected Terminal block Out of the scope of Hitachi supply Coon Operation signal Batch error signal Interlock signal:/hot pump Interlock signal: pump Coon Operation signal Batch error signal larm signal Combustion signal Dilution signal mode Remote mode temperature abnormal

8 Piping work Fuel system Instal a flow meter ir conditioner or an oil flow meter (When oil fired) near the chiller heater. Gas Oil Outgoing Return (Strainer) /hot system Outgoing header Bypass valve Expansion tank Return header Strainer system Strainer tower Control cooling temperature by means of 3way valve and starting/ stopping the cooling tower fan. Precautions for /Hot Water and Water Piping Work 1. Water piping must be installed according to the diagram. 2. For the direction of the inlet and outlet, refer not to this diagram but to the installation drawing. It depends on the specifications. 3. Do not allow 7 (8 kg/cm2g) or higher pressure to be applied on the chillerheater (For units manufactured for particularly high pressure, the corresponding pressure will be regarded as this value.) 4. Install a drain valve at the lowest part of the piping between stop valve and chillerheater. 5. Install an air vent valve at a location higher than the chillerheater. 6. Install thermometer and pressure gauge at locations shown in the diagram. 7. When the chilled/hot system is not an open system, install an expansion tank according to the diagram. 8. Install the cooling tower at a location where no exhaust from chimneys will be sucked into it. If exhaust is sucked into it due to wind direction, cooling may become contaminated causing tubes to corrode. 9. Be sure to install a strainer of approx. 10mesh. If a lot of debris is contained in the chilled system, they gather in the tubes and may cause chilled to freeze. clogged cooling system may cause pressure to rise during operation, or tubes to corrode. 10. Provide a for tube cleaning. Safety Precautions (Regarding use) Drain system for control accessories Grounding bus Interlock Seismoscope Gas leakage ir conditioner, etc. Exhaust system Provide safety relief valve drain, purge drain and other Drain piping flue or chimney Drain Drainage ditch or pan must be installed at the exhaust outlet of chillerheater so that back pressure is 0 to 5 Wq. Remote start/stop signal When the scope of Hitachi supply Chiller/heater control panel Central supervision board, etc. Indication signal Symbols Thermometer Pressure gauge Strainer Stop valve ir vent valve Drain valve Pump 3way valve 2way valve /hot pump and cooling pump interlock operation signal /hot pump and cooling pump interlock signal tower interlock operation signal ccessory/ panel Correctly use the unit after carefully reading the instruction manual and the operation guide as well as understanding the explanation given by the manufacturer. (Regarding installation) void installing the unit in places where inflaable material (oline, thinner, etc.) is handled or where corrosive (aonia, chlorine, etc.) is generated. Otherwise, a fire might result. Carryingin work, installation work, foundation work, electrical work, various piping work, various interlock work and hot/cold insulation work are necessary. Consult expert companies. Improper work might cause overturn, electric shock, leakage, refrigerant leakage, fuel leakage, oxygen deficiency accidents, burn or other problems. Flue or chimney work may be required. Consult an expert company. Improper work might cause fire, burns, oxygen deficiency accidents or other problems., Suction and exhaust piping work may be required. Consult expert companies. Improper work might cause oxygen deficiency or other accidents. Electric Cabling Work How to the ChillerHeater The chillerheater is designed to be fed from a 3 phase, 3wire system sorce as standard, where phase S must be grounded. Waterproofing is necessary on the floor surface of the place where chillerheater unit is installed, as well as drainage ditch is necessary around the installation place. Improper proofing might cause leakage, resulting in damage to neighboring facilities in the worst case. Standard specifications and options system system Hot system Scope of work Scope of delivery Standard specifications Options Specification table value (constant flow rate) Variable flow operation (lower limit %) Inlet 12 C, outlet 7 C/Large temperature differential: Inlet 15 C, outlet 7 C Outlet temperature 5 to 12 C Max. working pressure 7 (gauge) (8 kg/cm 2 G) Specification table value (constant flow rate) Variable flow operation (lower limit %) EXH series: Inlet 32 C, outlet 37 C EXS series: Inlet 32 C, outlet 37.2 C V series; Inlet 32 C, outlet 3 C Large temperature differential: Inlet 32 C, Outlet 39.4 C (V), 38.9 C (EXS), 38.7 C (EXH) Lower limit on inlet temperature: 20 C ( fired), 28 C ( fired) Water quality City (conforming to JR1) Industrial, well, reused waste, sea (daptable after investigating quality, etc.) Max. working pressure 7 (gauge) (8 kg/cm 2 G) Specification table value (constant flow rate) Variable flow operation (lower limit %) EXH series: Inlet 56.6 C, outlet 60 C EXS series: Inlet 54.4 C, outlet 60 C Outlet temperature 61 to 75 C (with heater) V series; Inlet 55.7 C, outlet 60 C Max. working pressure 7 (gauge) (8 kg/cm 2 G) For indoor use Main unit: nticorrosive primer coating Installation (Neither top coat nor hot/cold insulation is included.) place mbient mbient temperature : 7 to 40 C, Heating: 2 to 40 C environment Relative humidity: 10 to 90%RH Carriedin form Complete unit carryingin No. of phases 3phase V, Hz 220 V, 3 V, 440 V, Hz / 60Hz Electrical wiring Wiring on machine Cabling (control cable, cable) Cabling with insulated flexible metal tube (PLIC) Main unit safety features overload: Burner fan, solution pump, refrigerant pump, etc. bnormal combustion: Combustion interlock, unexpected flame loss, abnormal fuel pressure Cycle error: Hightemperature pressure too high, hightemperature temperature too high, exhaust temperature too high, high temperature solution level too low, refrigerant too cool, etc. Suspension of chilled supply Control panel See the items for control panel Capacity control Mode Proportional control (), 3position control ( fired) with PID compensation Purge system Mode ccumulation of noncondensable es in tank by means of solution ejector and automatic discharge of noncondensable es by means of mechanical purge pump Safety cutoff valve Fully automatic double cutout Combustion Combustion : to approx. 25% equipment range fired: to approx. 40% Fuel Gas Oil Item Transportation Carryingin & installation FOB / CIF, etc Unloading Site building to machine base Installation & leveling Classification nchor bolts & nuts Installation parts Level adjustment liner plates ntivibration stoppers Hot/cold insulation Hot insulation and cold insulation work Chillerheater main unit Finish coat Control panel board Control board on main unit Separately prepared board, Electrical work central supervision board, etc. Earthing temperature control Control board on main unit Equipment work ppurtenant work Installation parts Mating flanges, packing, bolts, nuts Packing and nuts for exhaust duct connection Coissioning & adjustment Others, and steam for coissioning and adjustment Disposal of packing materials ftersales service 1. bsorption chillerheater main unit (Including the initial charging of solution and refrigerant) 2. Transportation (Depends on the contract) 3. Coating Main unit: nticorrosive primer coating Control panel: Munsell 5Y7/1 semigloss (both inner and outer surfaces) 4. Wiring on absorption chillerheater Supplied by Hitachi Supplied by Customer 5. Leakage test in Hitachi factory 8. ccessories a. Rubber pad (9.5 thick) b. Sole plate (6.0 thick) Suspension of cooling supply Seismometer The following table shows a standard scope of supply and actual scope is subject to contract. Please consult with our sales staff or distributors. Depends on the contract Ex truck Carryingin to be supervised Remarks s needed For vibrationproof specification Hitachi work is up to anticorrosive primer coating Paint color: Munsell 5Y7/1 semigloss 3 VC, 3phase /hot and cooling pumps interlock operation Wiring for interlock and central supervision tower fan start/stop, 3way valve control, etc. Foundation work, chilled/hot, cooling, fuel drain piping work, exhaust flue work For chilled/hot and cooling piping

9 Printed in Japan (H) MRE0P 0307