background image

 

Set points

设置点

设置点

设置点

设置点

 

The set points can be adjusted through controller software. 

设置点可以通过压缩机控制板软件调整。

 

The table below shows all the set point related information.  

下面的表格显示所有设置点的相关信息。

 

 

Standard settings 

标准设置

标准设置

标准设置

标准设置

 

Range 

范围

范围

范围

范围

 

Unit 

单位

单位

单位

单位

 

Description 

描述

描述

描述

描述

 

Function 

功能

功能

功能

功能

 

25 

[20-40] 

°

Compressor

压缩机

 

Set  point  for  the  compressor 
operation  can  be  selected  by 
means  of  software  between20 

°

C and 40 

°

C. 

压缩机工作温度通过软件设定在

20

°

C ~40

°

C

之间。

 

If the return air is set point com-
pressor starts. 

如果回风温度超过设置点,压缩
机启动。

 

If  the  return  air  drops  to  the  set 

point 3 

°

C , compressor stop. 

如果回风温度低于设定点

3

°

C

缩机停止。

 

 

Compressor operation

压缩机

压缩机

压缩机

压缩机运转

运转

运转

运转

 

Failure indications 

故障描述

 

1. If the current to the compressor is missing the compressor running again after 30 second if the current 
reappears. If the HP pressure switch is activated the compressor start running when the pressure turn to 
normal. 

2. If the compressor start failed, the compressor will try to start after one hour later Under the normal power 
supply. Tow times try to start failed the control will send the signal and never try to start until the failure dis-
appear. 

1. 

如果压缩机电流消失又再现,压缩机延时

30

秒启动。如果内部安全压力开关动作压缩机跳闸,当压力恢复

到正常值时压缩机马上启动。

 

2. 

如果由于压缩机自身原因未能启动,在正常供电的情况下压缩机将在一小时后尝试再一次起动,如果连续

两次没有能正常启动起来那么主板将输出一个报警信号并且不再尝试启动。

 

Summary of Contents for DAC20-450D

Page 1: ...C20 450D DAC20 450D Dantherm Air Handling Suzhou Co Ltd Address No 855 Zhu Jiang Rd SND Shi Shan Industrial Belt Suzhou Jiangsu China Phone 86 512 66678500 Fax 86 512 66678501 Homepage www dantherm ai...

Page 2: ...Revision History Revision Description Date Author A First design Reed Wu 2010 06 01 01 Release Reed Wu 2010 10 08 Tom Sun 2010 12 22...

Page 3: ...N OF THE UNIT 6 4 DESCRIPTION OF FUNCTIONALITY 7 GENERAL DESCRIPTION 7 TEMPERATURE 8 SET POINTS 9 COMPRESSOR OPERATION 9 HIGH TEMPERATURE ALARM 10 CONDENSER FAN OPERATION 10 INTERNAL FAN OPERATION 10...

Page 4: ...eventive maintenance Usage of the product The DAC20 450D is especially designed for cooling of electronic equipment and for outdoor installation The unit must not be used for other purposes under any...

Page 5: ...equipment part 2 2 specification of environmental tests transportation ETS 300 019 1 1 Equipment engineering environmental conditions and environment tests for telecommunications equipment part 1 1 c...

Page 6: ...cted with foam Then per Thirty units are carried in a wooden package PE Contents in the package The DAC20 450D air conditioner is delivered with an installation kit with the following content DAC20 45...

Page 7: ...be with clip lock at the bottom of the body and stick the sponge strip on inside flanges Lift the unit up and place it in the wall of cabinet mount the brackets and flanges with M6 bolts nuts fixing u...

Page 8: ...he main power cable from power supply Make sure that the power supply is powered off Demount all screws on the flanges Take off the air conditioner 3 Identification of the Unit All units have a silver...

Page 9: ...r to the refrigerant and exhaust to the ambient air through the condenser coil The closed loop internal circuit protects the enclosed equipment all types of hostile environments and control the intern...

Page 10: ...o cool down the electronic equip ment Return air temperature is the temperature of the air entering the air conditioner from the electronic equipment Ambient air temperature is the outside air tempera...

Page 11: ...If the return air drops to the set point 3 C compressor stop 3 C Compressor operation Failure indications 1 If the current to the compressor is missing the compressor running again after 30 second if...

Page 12: ...The condenser fan is stopped until cooling is needed When the compressor starts the main board can feel condenser temperature when condenser temperature above 35 C condenser fan will also start 35 Int...

Page 13: ...350 Pressure Operation Pa Operating pressure 101 3 70 106 Disp Pa Estimated pressure drop internal 80 Drop Pa Pressure drop in climate unit int 80 Temperature Tcooling C Cooling set points 25 20 40 t...

Page 14: ...Tools Like a car the units need to be maintained with at regular interval to prevent an overheated situation causing the BTS to shut down Also lack of maintenance could cause unnecessary pollution to...

Page 15: ...isit is Step Action 1 Make sure that the power to the unit is safely switched off 2 Clean the unit carefully for dust especially at Air ducts Fans Condenser and evaporator coils 3 Perform a test simul...

Page 16: ...e corrosion and show no obvious signs of leakage Are the coil lamellas clean and undamaged Are all fan blades free of obstructions cracks missing blades and in balance Do the fans rotate freely and ar...

Page 17: ...running smoothly so only replace if the component is faulty DAC20 450D Before the demounting the old spare part it is very important to order the new spare part from Dantherm To do this most effectiv...

Page 18: ...Screwdriver T20 Step1 Step2 Step3 Remove the Cover screws Remove the connecter Remove 4 screw and take off internal fan Step Action 1 Remove internal cover install screw see step1 1 2 Remove the conn...

Page 19: ...Action 1 Remove screws fixing the inside cover same as replacing the internal fan 2 Unplug the connector and remove four screws on external fan cover plate 4 3 Replace the external fan Replacing the...

Page 20: ...rtified cooling technician should carry out the evacuation by using the necessary evacuation and recycling equipment If the refrigerant gas is not to be recycled by the evacuator it must be passed on...

Page 21: ...ould be left to the local scrap dealer PCB Metal parts The metal parts are uncritical to scrap and can be left to local scrap dealer A few parts might have a thin visible layer of PVC foam insulation...

Page 22: ...20 Wiring diagram...

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