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Computer Room Air Handling Unit

Computer Room
Air Handling Unit

We propose the optimal air conditioning solutions to support the stable operation of data centers.
We offer “product customization” to respond to the requirements of customers.

Component parts that realize both high performance and energy-saving performance

Built-in autonomous control systems

Item		Details
Communication	External communication	BMS: BACnet IP (ASHRAE) or Modbus
Communication	Internal communication	(1) Fan and chilled water valve: Modbus RTU (2) Operation panel: RS485 (HMI only)
Control	Chilled water volume control	(1) SA Temp. constant control^1 (2) RA Temp. constant control^{1, *2}
	Fan speed control (Air volume control)	(1) RA Temp. constant control^{1, 2} (2) SA static pressure constant control^1 (3) Fan speed constant control^1
	Failure control	(1) Fan failure control ^{(*1 AHU stop, continued operation, fan maximum operation)} (2) Water leakage detection (Alarm)

*1 Select one of each control. *2 Select one or the other.

Item		Details
Function	Remote/local switching Start/Stop function	Switching on operation panel
	Remote/local switching Start/Stop function	Start/Stop by remote or operation panel
	Setpoint _{(Temperature, static pressure and speed)}	Setting by remote or operation panel
	Operation panel display/ Monitoring item	Condition monitoring (Start and stop/Temperature/Chilled water valve/Fan) Failure and communications error (Each component) Alarm (Filter differential pressure, water leakage)
Option	External communications	Gateway (when BACnet IP IEIEJ)
	ATS and UPS	ATS: Automatic power switching when power is cut off. (Line A ⇔ Line B) UPS: Power supply to control circuits during ATS switchover
	Monitoring item	Chilled water calorimetry
	Group control	By customer request

Frontflow type (Maintenance-oriented design)

The design enables maintenance of all the equipment from the air handling unit RA side
The filter part and fan installation part can be opened and closed

■ Series table (Representative examples)

Air volume	m³/h	40,000	60,000	80,000	100,000	120,000
Cooling coil capability	kW	146.7	220.0	293.3	366.7	440.0
EC fan	kW/Qty.	2.85/4	3.70/4	3.70/6	3.70/8

・The space-saving type of side-face maintenance method is also supported.

Downflow type

■ Series table (Representative examples)

Air volume	m³/h	20,000	30,000	40,000	50,000
Cooling coil capability	kW	73.3	110.0	146.7	183.3
EC fan	kW/Qty.	2.85/2	2.85/3	3.70/3	3.70/4

Air Handling Unit Main frame

The aluminum frame use realizes a high rust-prevention effect and about 25% weight reduction

Commissioning

A specialist engineer provides support for L1 to L6 commissioning.
[Factory inspections (FAT & FWT)]
We implement capability measurement and function inspections and provide high quality products.

Test item
Performance test	Air volume, external static pressure, power consumption, cooling coil capability and noise outside machine
Energization inspection
Appearance and structural inspection
Operation check	Test of automatic recovery of main power supply
	Controller failure test and UPS backup confirmation test
	Valve operation test and fan operation test
	Failure operation test and ATS switching test
Alarm function test
BMS communication test
Vibration test
Harmonics check

Service system

After product delivery, we provide rapid after-sales service from our maintenance department and our nationwide service network.

Computer Room Air Handling Unit