AHU connection kit

1.

AHU connection kit

2.

1. What is AHU?
AHU means Air Handling Unit.

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4.

1. What is AHU connection kit?
Chigo AHU connection kit is an interface to allow 3rd party manufacturer’s AHU
connecting to Chigo VRF outdoor units.
Chigo VRF outdoor units can be used with this connection kit, creating an ideal
solution when a unique AHU is required.
One AHU need at least one AHU kit.
0-10V function
5HP
10HP
20HP
30HP
No 0-10V
5HP
10HP
20HP
30HP

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2. What a AHU kit includes?
AHU connection kit consist of control part, EXV part, temperature sensors and
wired controller.
Controller
AHU connection kit
Control part
EXV part
Sensors and wires
PCB
Power terminals
Communication terminals
Outlet pipe
Inlet pipe
EXV
T1 sensor and wire
T2 sensor and wire
T2b sensor and wire
Controller wire

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3. How to use AHU kit?
Chigo VRF outdoor unit
Chigo VRF indoor unit
Ahu-kit
3rd party AHU

7.

Power supply
Power supply
P/Q/E
T1/T2/T2B
G/L pipe
Fan&pump
Power supply

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4. How to connect?
Reserved fan, pump, water level switch control
terminals for AHU.
ON/OFF, alarm signal output, 0-10V port(new).
Power
Pump
Fan
ON/OFF
Input 010V signal
Alarm
Water level switch
Outdoor

9.

T1:room temp. sensor
T2:middle of evaporator sensor
T2b:Air Outlet sensor
Ts: setting temp. in controller T1 sensor
T2&T2b
T2b
AHU
connection
Kit
T1
Air
Wired controller
T2
Ts
Room
Air

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5. How to set EXV control way?
• Two capacity control ways
• One is determined by Ts/T1,the other is 0-10V input.
0-10V function
T1&Ts
t
10
℃
8
℃
6
℃
4
℃
2
℃
Proportion
120%
100% 80%
60%
40%
t means tem difference between Ts and T1

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6. What if two or more AHU kits used in parallel
Piping System
Distributor
Distributor
AHU
kit
Liquid pipe
AHU
kit
ODU
Gas pipe
AHU

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Wiring Diagram
AHU kit
P
Q
E
ODU
P
Q
E
P
Q
E
AHU kit
Fan
Pump
Water level switch
IDU/AHU

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Sensor Connection
AHU kit
T1
T2
T2B
IDU/AHU
T1
T2
T2B
AHU kit
All the sensors must be attached to the corresponding position

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Address set
When there are two or more units connected in one system it need set
different addresses to avoid address conflict.

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5HP
Address: 00
10HP
Address: 08/09
20HP
30HP
Address:16/17/18/19
Address: 32/33/34/35/36/37
One system can connect max 16 pcs 10HP/20HP AHU kits, or 8 pcs 30HP AHU kits.

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THANK YOU!