Haier DW-150W200 Operation Manual

Super low temperature (slt) freezer

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uper Low Temperature (SLT) Freezer

Please read this manual carefully before using the freezer.

Please keep this manual in a safe place for future reference.

The freezer is designed for preserving various articles at low temperature for such departments as

clinic, medicine, scientific research and quarantine, etc.

（DW-150W200）

Operation Manual

Contents

Before Use

Product Features-----------------------------------2

Parts Name

Safety Precautions----------------------------------4

Installation Location-------------------------------6

In Use

Preparations and Operation Procedures------7

Control Board Adjustment---------------------9

Maintenance & Servicing

Defrosting · Non-use-----------------------------12

Cleaning--------------------------------------------13

Q & A-----------------------------------------------14

After-sales Service------------------------------- 15

Technical Parameter

Schematic Circuit Diagram------------------ 18

-----------------------------------3

1-24

Table of Contents

Summary of Contents for Haier DW-150W200

Page 1: Table Of Contents
Low Temperature (SLT) Freezer （DW-150W200） Operation Manual Contents Before Use Product Features-----------------------------------2 Parts Name -----------------------------------3 Safety Precautions----------------------------------4 Installation Location-------------------------------6 In Use Preparations and Operation Procedures------7 Control Board Adjustment---------------------9 Maintenance & Servicing Defrosting · Non-use-----------------------------12 Cleaning--------------------------------------------13 Q & A-----------------------------------------------14 After-sales Service------------------------------- 15...
Page 2: Product Features
Product Features ● Relying on unique cascade refrigeration system and its stable/reliable running, the freezer achieves better refrigeration effect and may be used in a wider range of ambient temperature compared with counterparts, greatly reducing maintenance cost. ● The freezer is featured with computer control, digital temperature display and adjustable internal temperature in the range of -126 ℃...
Page 3: Parts Name
Thank you for choosing and using Haier products! Haier is dedicated to providing high-grade, high-precision and advanced products, and thus it may say that Haier products are featured with good quality and high performance. For your better use, please read this manual carefully before use and follow the operation procedures as described in this manual.
Page 4: Safety Precautions
Safety Precautions Please read all the installation and operation instructions carefully, and strictly follow them when installing and operating, otherwise the user shall be solely liable for any resultant damages (including part damage). Precautions for installation location Installation site of the equipment should ensure a well-ventilated circumstance, avoid direct sunlight.
Page 5 samples into the freezer in batches and pre-cool those hot samples fully before putting them into the freezer. In case of handling or moving, only after the freezer is left still for over 24 hours can it be energized to operate, otherwise result in serious damage to the freezer, even compressor burn-out. For any equipment may go wrong or fail to work, the user must ensure that reserve equipment or reserve devices are available in the vicinity so that samples can be moved into safe reserve equipment or system for preservation in an emergency.
Page 6: Installation Location
Installation Location 1. The freezer must be installed in a well-ventilated place where the room temperature is below 27°C. 2. The freezer must not be placed in the site that under direct sunlight or close to heat sources. 3. The temperature of equipment working environment should not be less than 10 ° C. The freezer should not be used if ambient temperature below 10°C.
Page 7: Preparations And Operation Procedures
Preparations and Operation Procedures When handling, it is strictly forbidden to overturn (upside down) the freezer; never allow its angle of inclination over 45° to avoid oil spill onto the system pipeline. Note: If the freezer is excessively inclined or upside down, compressor oil would spill onto the system pipeline, resulting in inadequate compressor oil.
Page 8 Samples storage and instructions Only after the freezer operates stably after commissioning and making sure that internal temperature meets storage requirements can samples be put into the freezer in batches. The freezer must not be loaded with samples over 1/5 of its effective capacity at a time. If samples are too hot, they should be pre-cooled down to required temperature by other equipment before being put into the freezer.
Page 9: Control Board Adjustment
Control board Adjustment Functions and operating instructions of the SLT freezer control board ● Temperature display A large display screen indicates actual internal temperature. A small display screen indicates current input voltage (no voltage indication for 3-phase power). Another small display screen indicates current ambient temperature. ●...
Page 10 H. “Low battery charge” indicator light “on” indicates the battery is at low charge and must be recharged; when connected to AC power supply, the SLT freezer charges the battery automatically. ● Key definition: There are 4 keys on the temperature control board. With the “Locked” indicator light on, all the keys are locked to prevent misoperations.
Page 11 “ ” or “ ▽ ”. After finishing the setting, if no key is pressed in 5s, the temperature value stops flashing, △ indicating that the value has been stored in the computer, otherwise the setting is invalid. The range of temperature setting is -126 ~ -150 ℃...
Page 12 2.8 If the freezer is required to reach its minimum temperature, e.g. –150 , ℃ please do as follows: make sure that ambient temperature is below 25 , ℃ and then set the temperature at –145 ℃ and observe for 5~7 days for stable working state and starting/stopping.
Page 13: Defrosting · Non-Use
Defrosting · Non-use Defrosting 1. After the SLT freezer is used for some time, a layer of frost may be formed; if too thick, it would influence the refrigeration effect and increase power consumption. Therefore, the freezer must be defrosted at certain interval, that is, upon the thickness reaching approximately 10mm. 2.
Page 14: Cleaning
Cleaning Cleaning and maintenance The freezer should be cleaned after unpacking but before initial startup for commissioning, during normal use or before non-use. For safety, be sure to turn off the power switch before cleaning. The freezer should be cleaned with a soft cloth or sponge moistened with water or soap water (non-corrosive neutral detergents permitted), and then wiped with a dry cloth to prevent rust.
Page 15 Q & A The following phenomena are not faults: In case of first use or startup, the freezer may work for a long time or give out loud noise, etc. That is not a fault but normal phenomenon. It is normal that the condenser fan starts and stops automatically according to ambient temperature. It is normal that there is fluid flow noise from the freezer arising from the cycle flow of refrigerant in its pipeline.
Page 16: After-Sales Service
1. immediately move the samples stored in the freezer into a safe freezer in the vicinity. 2. turn off power switch. 3. contact and report the fault to local Haier After-Sales Service Center to have it clear soon. Common troubles and solutions...
Page 17 Solutions: If the problem lies in control board, replace it; if lies in compressor itself, replace it or its accessories. Unstable temperature Internal temperature does not reduce, but rises, e.g. rises to -80 ℃ from -140 ℃ . Cause 1: Dirty condenser or clogged air vent Solution: Clean the condenser Cause 2: Slowdown of fan speed Solution: Replace the fan...
Page 18 In case of any fault, be sure to immediately move the samples stored in the freezer into a proper device for safe preservation, and then turn off the freezer and contact Haier Headquarters or local After-sales Service Center to receive timely and fast service.
Page 19 “Installation and Commissioning Sheet” for those products purchased from dealers). As for the products out of warranty period, they will be charged as per Haier Uniform Service Charge Standard. For the replacement of parts, only cost and freight are charged and no charge on service is required to pay.
Page 20: Technical Parameter
Technical Parameter Model Overall dimensions 1570×850×1060 DW-150W200 (W×D×H) Effective volume 200L Internal dimensions 667×462×650 (W×D×H) Min. -150 ℃ Compressor 3.5HP temperature Operating -126~-150 ℃ Rated current 2-phase 19A, 3-phase temperature range Rated voltage 380V/50Hz Weight 315kg 220V/50Hz Temperature decreasing curve reference...
Page 21 Packing List Qty. Description Warranty Card Operation Manual Frost scraper Plastic bag Model DW-150W200 21-24...
Page 22: Schematic Circuit Diagram
Schematic Circuit Diagram 22-24...
Page 23 Schematic Refrigeration Diagram 23-24...
Page 24 Ambient Conditions The freezer is designed in consideration of following conditions and can be used in a safe way at least under the following conditions (on the basis of IEC 1010-1): 1. Indoor use; 2. Altitude not higher than 2000m; 3.

Haier DW-150W200 Operation Manual

Table of Contents

Operation Manual

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Summary of Contents for Haier DW-150W200

Table of Contents