Aqua Tempo Super II Series DC Inverter Air-cooled chiller unit (50Hz) MCAC-ATSM-201704
53
Evaporator
Recirculation
For minimum chilled water flow rate
For maximum chilled water flow rate
Evaporator
Recirculation
Maximum chilled water flow
The maximum chilled water flow is limited by the permitted pressure drop in the evaporator. It is provided in
the below table.
If the system flow is more than the maximum unit flow rate, bypass the evaporator as shown in the diagram
to obtain a lower evaporator flow rate.
Minimum and Maximum water flow rates
Model
Water flow rate(m3/h)
Minimum Maximum
MC-SU30-RN1L 3.8 6.4
MC-SU60-RN1L 8.0 13.0
15.2.8 Design of the store tank in the system
a. kW is the unit for cooling capacity, L is the unit for (G) minimum water flow volume in the formula.
Comfortable type air conditioner
G= cooling capacity×2.6L
Process type cooling
G= cooling capacity×7.4L
b. In certain occasion (especially in manufacture cooling process), for conforming the system water content
requirement, it’s necessary to mount a tank equipping with a cut-off baffle at the system to avoid water
short-circuit, Please see the following schemes:
Error
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Recommendation
15.2.9 Design of expansion tank
If a closed expansion tank with its filled volume of air is too small, the system pressure will easily exceed the
maximum allowable pressure and cause water to discharge from the pressure relief valve, thus wasting
water. If the closed tank is too large, when the water temperature drops, the system pressure may decrease
to a level below the minimum allowable value and cause trouble in the air vent. Therefore, accurate sizing of
a closed expansion tank is essential.
For diaphragm expansion tanks, the minimum volume of the water tank, Vt, gal(m3),can be calculated by the
following formula, recommended by ASHRAE Handbook 1996, HVAC Systems and Equipment:
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