Haier AH1-070B Manual page 35

Ahu valve box

Table of Contents

a) If the DDC can provide 0-10V, mode and on/off signals to Haier AHU kit, the wired controller does not need to be

connected. If only 0-10V signal, the wired controller is necessary.

b) If Haier wired controller is connected into the system, the wired controller has the top priority. As a result, if the

wired controller is set into off status, signals from DDC to Haier AHU kit will be invalid. When the wired controller

is turned on, first to adjust operation mode and then the 3rd party AHU units can be controlled by 0-10V signal

from DDC to Haier AHU kit adjusting the outdoor unit capacity.

c) If the wired controller is connected, wired controller can directly control the 3rd party AHU fan motor. Or Haier

AHU kit PCB provides fan speed dry contact signal to DDC or to AHU unit PCB directly. If users want to use

wired controller to adjust fan speeds, set the wired controller according to AHU fan motor grades and max. 3 fan

speeds can be controllable.

d) Haier AHU kit can provide mode signal to DDC or AHU unit PCB directly to control the AHU unit, e.g. if the DDC

or 3rd party AHU unit PCB receives defrost signal from AHU kit, AHU fan motor will be controlled.

e) The maximum input range of voltage whitch is from DDC is 0-10v. If it exceeds 10V, input shall be 10V; if it is

lower than 0V, input shall be 0V. The maximum input voltage shall not exceed 10V.

• Plan B: Setting temperature by 0-10V signal.

Simple DDC Voltage Range(V)

0~1.0

1.1~1.7

1.8~2.3

2.4~2.9

3~3.5

3.6~4.1

4.2~4.7

4.8~5.3

5.4~5.9

6~6.5

6.6~7.1

7.2~7.7

7.8~8.3

8.4~8.9

9~10