Description
The two-stage condensing unit has a two-stage compressor. It is supplied by BITZER. This product is also used for changing refrigerant vapor into liquid. This compressor condenser unit mainly consists of air cooled condenser, liquid reservoir, high pressure controller, low pressure controller, dry filter, solenoid valve, junction box and thermal expansion valve. Two-stage condensing units are applicable to agricultural forestry, fishery, pharmaceutical and chemical industries.

Features and Advantages
1. The high efficient valve plates are impact resistant spring steel.
2. This compressor condenser unit is energy-saving, sturdy, durable and reliable.
3. Two-stage condensing units have the smallest dead spots gap.
4. It is equipped with high-capacity motor.
5. This compressor condenser unit is more suitable for higher temperature environment.
6. A silencer is installed inside the unit, so it features small vibration and low noise.
7. Two-stage condensing units have high refrigerating efficiency. They can save more than 30% of energy. It is easy to achieve automatic control. This equipment can save investment and operating cost.
8. We have complete range of models. They can be arranged to form any combinations to meet all kinds of requirements.
9. The protective devices of two-stage condensing unit or compressor condenser unit include phase protector, water-flow switch protector, low water-level protector, water pump overload protector, compressor overload protector and high and low pressure switches protector.
10. The high-pressure level cooling function is used at initial cooling stage. When the load falls to a certain degree, the low-pressure level is activated to make further cooling. This method has obviously increased the cooling speed.
11. Level-3 or level-4 capacity regulator is used to keep the refrigeration output matching with the system load. Non-stage capacity control is optional.

1. Chilled-water tower, condenser, filter and evaporator should be washed regularly in order to keep the two-stage condensing unit or compressor condenser unit running favorably.
2. The temperature switch should not be set to below 5℃ to prevent the evaporator from freezing (except for the low-temperature refrigerator).
3. When the chilled water reaches a set temperature, the compressor would stop automatically. That is a normal phenomenon.
4. As long as the two-stage condensing unit or compressor condenser unit runs well, clients can change the lubrication oil every 20000 hours or four times a year. Make sure the equipment is clean before lubricating.

Operating Condition:-40℃/40℃ R22
Low-Pressure Compressor	Number	Low Pressure Oil Separator	High-Pressure Compressor	Number	High Pressure Oil Separator	KW
HSKB7451-40	2	OA4088	HSK6461-60	1	OA1854	87
HSKB7451-40	3	OA4088	HSK7471-90	1	OA1854	130
HSKB7451-40	4	OA9011	HSK8561-125	1	OA4088	173
HSKB7451-40	5	OA9011	HSK7461-80	2	OA4088	217
HSKB7451-40	6	OA9011	HSK7471-90	2	OA4088	260
HSKB7461-40	2	OA4088	HSK7451-70	1	OA1854	99
HSKB7461-40	3	OA4088	HSK8551-110	1	OA4088	148
HSKB7461-40	4	OA9011	HSK8571-140	1	OA4088	197
HSKB7461-40	5	OA9011	HSK7471-90	2	OA4088	247
HSKB7461-40	6	OA14011	HSK8551-110	2	OA9011	296
HSKB7471-40	2	OA4088	HSK7461-80	1	OA1854	112
HSKB7471-40	3	OA9011	HSK8551-110	1	OA4088	168
HSKB7471-40	4	OA9011	HSK7461-80	2	OA4088	224
HSKB7471-40	5	OA9011	HSK8551-110	2	OA9011	280
HSKB7471-40	6	OA14011	HSK8551-110	2	OA9011	335

   

Operating Condition:-45℃/40℃ R22
Low-Pressure Compressor	Number	Low Pressure Oil Separator	High-Pressure Compressor	Number	High Pressure Oil Separator	KW
HSKB7451-40	2	OA4088	HSK6461-60	1	OA1854	68
HSKB7451-40	3	OA4088	HSK7471-90	1	OA1854	102
HSKB7451-40	4	OA9011	HSK8551-110	1	OA1854	136
HSKB7451-40	5	OA9011	HSK7451-70	2	OA4088	170
HSKB7451-40	6	OA9011	HSK7471-90	2	OA4088	204
HSKB7461-40	2	OA4088	HSK7451-70	1	OA1854	78
HSKB7461-40	3	OA4088	HSK8551-110	1	OA1854	117
HSKB7461-40	4	OA9011	HSK856-125	1	OA4088	156
HSKB7461-40	5	OA9011	HSK7461-80	2	OA4088	195
HSKB7461-40	6	OA14011	HSK8551-110	2	OA4088	234
HSKB7471-40	2	OA4088	HSK7461-80	1	OA1854	88
HSKB7471-40	3	OA9011	HSK8551-110	1	OA1854	133
HSKB7471-40	4	OA9011	HSK8571-140	1	OA4088	177
HSKB7471-40	5	OA9011	HSK7471-90	2	OA4088	221
HSKB7471-40	6	OA14011	HSK8551-110	2	OA4088	265

   

Operating Condition:-50℃/40℃ R22
Low-Pressure Compressor	Number	Low Pressure Oil Separator	High-Pressure Compressor	Number	High Pressure Oil Separator	KW
HSKB7451-40	2	OA4088	HSK6461-60	1	OA1854	55
HSKB7451-40	3	OA4088	HSK7471-90	1	OA1854	82
HSKB7451-40	4	OA9011	HSK8551-110	1	OA1854	109
HSKB7451-40	5	OA9011	HSK7451-70	2	OA4088	137
HSKB7451-40	6	OA9011	HSK7471-90	2	OA4088	164
HSKB7461-40	2	OA4088	HSK7451-70	1	OA1854	62
HSKB7461-40	3	OA4088	HSK8551-110	1	OA1854	93
HSKB7461-40	4	OA9011	HSK856-125	1	OA4088	124
HSKB7461-40	5	OA9011	HSK7461-80	2	OA4088	155
HSKB7461-40	6	OA14011	HSK8551-110	2	OA4088	187
HSKB7471-40	2	OA4088	HSK7461-80	1	OA1854	70
HSKB7471-40	3	OA9011	HSK8551-110	1	OA1854	106
HSKB7471-40	4	OA9011	HSK8571-140	1	OA4088	141
HSKB7471-40	5	OA9011	HSK7471-90	2	OA4088	176
HSKB7471-40	6	OA9011	HSK8551-110	2	OA4088	211

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