ULT Energy-saving Series
After-sales Service Manual
28
DW-86L100J
Medical low-temperature refrigeration chamber for conservation
Production License of Medical Instrument No.: LSYJXSCX No. 20100176
Product registration No. and technical requirement No.: LXZZ 20162580180
Model:
DW-86L100J
Refrigerant
R600A:
75 g
Inner temperature:
-40°C~-86°C
R1150:
15 g
Storage volume:
100 L
R50:
5 g
Rated voltage:
220 V~
Foaming materials:
HFO-1233zde
Rated frequency:
50 Hz
Manufacture date and
No.:
See the barcode on the
refrigerator.
Power:
680 W
Service life:
See the Manual.
Climate class:
N
Please refer to the Manual for other contents.
Net weight:
108 kg
Electric shock protection
type:
I
Address: Haier Industrial Park, Qingdao Economic
and Technological Development Zone Service
hotline: 4006 99 2017
Qingdao Haier Special Electrical
Appliances Co., Ltd.
VII. Case preventive measures, product use and daily maintenance knowledge
7.1 Principle of ultra-low temperature refrigeration:
The ULT Freezer adopts cascade refrigeration system that is usually composed of two or more refrigeration
systems, which are called high temperature stage system part and low temperature stage system part respectively.
High temperature stage system uses medium temperature refrigerant, and low temperature stage system uses low
temperature refrigerant. Each part is a complete refrigeration system. The two parts are connected by a condensing
evaporator, which is both the evaporator of high temperature stage system and the condenser of low temperature
stage system. The low temperature refrigerant absorbs the heat of the object to be cooled in the evaporator of the low
temperature stage system, and transfers the heat to the refrigerant of the high temperature stage system through the
condensing evaporator, and then the heat is transferred to the cooling medium in the condenser of the high
temperature stage system by the refrigerant of the high temperature stage system.
DW-86L100J uses auto-cascade refrigeration system with single compressor for refrigeration;
7.2 Method of use of the ULT Freezer
Method of use:
If the ULT Freezer is used for the first time, or if the ULT Freezer has been transported, or if the power is cut off
(including power failure) for more than 10 hours, the ULT Freezer must be inspected before use (or before power on
again). Confirm if pass the inspection.
Method of use of the ULT Freezer
1) The freezer must be left standing for at least 24 hours before it can be powered on.
2) Power on and start up the empty freezer with nothing, cool the freezer to -40°C by stages, and then to -60°C after
normal on and off, and then adjust to -80°C after 8 hours of normal on and off. Observe that the freezer has been on
and off normally for more than 24 hours, which proves that the performance of the freezer is normal.
3) After confirming that the freezer is normal as Step 2, the items can be stored in the freezer. In principle, the
freezer should store items with a temperature of -60°C, which shall not account for a capacity greater than 1/3
