Haier AH1-070B Manual page 36

• Plan C: Third party thermostat controls ON/Off by dry contract signal.
a) Haier wired controller is necessary.
b) The wired controller has the top priority. If the wired controller is off, the signal information from the 3rd party
thermostat to AHU kit will be invalid.
c) In this control method, it's necessary to set operation mode
d) In this control method, AHU kit can also output dry contact signal or strong electricity to control AHU fan motors
e) AHU kit can provide mode signal to DDC or AHU unit PCB directly to control the AHU unit, e.g. if the DDC or
AHU unit PCB receives defrost signal from AHU kit, AHU fan motor will be controlled.
• Plan D: The wire controller specilally designed by Haier is needed.
a) Haier AHU kit controls 3rd party AHU units such as the on/off, temperature settings, fan speed adjustment and
operation mode etc.
b) Haier AHU kit can provide mode signal to DDC or AHU unit PCB directly to control the 3rd party AHU fan motor.
It's required to output either the dry contact or strong electricity signal.
Controlling AHU fan motor
Wired controller can be used to adjust the fan speeds.
Wired controller can realize Max. 3 fan speeds adjustment according to AHU fan motor grades.
When wired controller is set into 3 grades, High/Medium/Low fan speeds can be adjusted.
AHU kit PCB can provide two types of signals to AHU fan motor:
a) Strong electricity type of high/medium/low fan speeds and fan motor stop signals.
b) Dry contact type of high/medium/low fan speeds and fan motor stop signals.
When wired controller is set into 2 grades, High /Low fan speeds can be adjusted.
AHU kit PCB can provide two types of signals to AHU fan motor:
a) Strong electricity type of high/low fan speeds and fan motor stop signal.
b) Dry contact type of high/low fan speeds and fan motor stop signal.
When wired controller is set into1 grade, air volume of AHU units will be uncontrollable.
AHU kit PCB can only provide two types of signals to AHU fan motor:
a) Strong electricity of high fan speed and fan motor stop signals.
b) Dry contact of high fan speed and fan motor stop signals.
Note:
In case of outputting strong electricity, it is necessary to connect the relay first before connecting to the electrical
devices.
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