AH-New
condensing air handling unit
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20
code HG0310.05GB ed.A-2010
AH
21
code HG0310.05GB ed.A-2010
AH
4.
USER'S INSTRUCTIONS
4.1.
AH unit operation
Ventilation operating logic
WINTER - HEATING
During operation in “Heating” mode (in winter), CPU - MASTER
PCB regulates ventilation by modulating the rotation speed on
the basis of the heat output (parameter H16 = 2) and of the
values set in parameters H12 and H13:
H12 = Y2 output minimum voltage (Default value 6)
H13 = Y2 output maximum voltage (Default value 10)
If the operation required is not of modulating type, but with
constant air flow rate, parameters H12 and H13 must be equal.
SUMMER - VENTILATION
During operation in “Ventilation” mode (in summer), ventilation
is fixed at constant speed, equal to the output of the voltage
value set in parameter H18:
H18 = Y2 output fixed voltage (Default value 8).
CPU modulation PCB hardware configuration
AH air handling units feature a CPU modulation PCB (inside
each module composing them), and a wiring card that allows
for a simple connection on the user’s side and between the
modules themselves.
An additional CPU modulation PCB is present inside the PCH
module.
MASTER, SLAVE and WIRING cards
• “MASTER” card = Manages the adjustment of the entire AH unit.
•
SLAVE" card = Manages the burner modulation of the single
PCH module referring to the "MASTER" card.
• WIRING CARD = user-side connections are made with the
Smart Web remote control and connections between Master
and Slave modules.
i
NOTE: All AH air handling units are supplied already
configured and with all the settings required to operate them.
For AH units with single module (AH034, AH065 and AH105),
the modulation PCB is parametrised as “MASTER” and the card
inside the PCH as “SLAVE”.
For AH units consisting of multiple modules (AH160, AH210,
AH320 and AH42) the CPU modulation PCB (MASTER) is
present only on the first module. The other modules have only
one wiring card in addition to the SLAVE cards inside the PCH
module.
Modulation PCB
Secondary
modulation PCB (PCH)
SLAVE
Main
modulation PCB
MASTER
Wiring card
