Table 148: Approximate refrigerant and water weight
Evaporator Pass Number of
tubes
Condenser Refrigerant
weight, lb
(kg)
Water weight,
lb (kg)
EB2914 2 299 25 mm 4G
microchannel
750 (340) 820 (370)
EB2914 2 242 25 mm 4G
microchannel
750 (340) 700 (320)
EB2914 2 147 25 mm 4G
microchannel
750 (340) 500 (225)
EB2914 3 299 25 mm 4G
microchannel
750 (340) 1,365 (620)
EB2914 3 242 25 mm 4G
microchannel
750 (340) 1,140 (520)
EB2914 3 147 25 mm 4G
microchannel
750 (340) 770 (350)
EB2514 2 242 25 mm 4G
microchannel
700 (318) 700 (320)
EB2514 3 98 25 mm 4G
microchannel
700 (318) 580 (265)
Note:
• The refrigerant weight is based on a maximum tube bundle.
• The water weight is the total water in the evaporator shell and for 150 psi, two-pass,
compact waterbox.
Evaporator maintenance
Maintenance of the evaporator shell is important to provide trouble-free operation of the chiller.
The water side of the tubes in the shell must be kept clean and free from scale.
The major portion of maintenance on the evaporator involves maintaining the water side of the
evaporator in a clean condition.
The use of untreated water in closed water systems and similar environments frequently results in
one or more of the following issues:
• Scale formation
• Corrosion or rusting
• Slime and algae formation
As a result, to ensure a longer and more economical life of the equipment, it is beneficial for the
user to provide for correct water treatment. To determine the condition of the water side of the
evaporator tubes, use the following guidance:
• The evaporator tubes under normal circumstances do not require cleaning. However, if the
temperature difference between the refrigerant and the chilled water increases slowly over the
operating season, it can indicate the following issues:
- The evaporator tubes are fouling
- A water bypass in the waterbox requires gasket replacement
- Refrigerant has leaked from the chiller
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