About The External Damper Operation; About The Co2 Sensor - Daikin VAM350J7VEB Installer And User Reference Manual

8 Configuration
Supply Fresh-up
(Excessive outdoor air supply)
Example
a b
c
a Part of supply fresh-up operation
b Air exhaust
c Air supply
d Heat reclaim ventilation unit
e Normal ventilation fan
f Part of exhaust fresh-up operation
g Air exhaust
h Patient room
If an external fan is connected to J1 and JC, take the following into
account:
▪ Setting 19(29)‑0‑03 MUST be configured, because otherwise the
filter cleaning indication will be displayed at the wrong time.
▪ Make sure that setting 18(28)‑8 is still set to 01 (fresh-up).
▪ Setting 18(28)‑7 selects exhaust air or supply air fresh-up and
whether the controller indicates that fresh-up is active.
▪ The following table describes the unit's operation based on setting
1A‑0 and J1, JC:
Setting Description of
setting (See
"8.2 List of
settings" on
page 25)
1A‑0‑01 Fresh-up
"OFF" (factory
setting)
1A‑0‑02 Fresh-up "ON"
The unit's fresh-up operation corresponds with the following fan
operation:
Type Supply Fresh-up
Ventilation Supply Exhaust
amount
Weak High Low
Strong Ultra high High
8.5.3

About the external damper operation

Function
Intake of outdoor air when the heat reclaim ventilation unit is off can
be prevented if an external damper is incorporated in the system.
The heat reclaim ventilation's main unit PCB operates the heat
reclaim ventilation and provides a signal for the external damper.
Installer and user reference guide
36
d
"J1", "JC" "J1", "JC"
Normal open Normal closed
Normal Fresh-up
Fresh-up Fresh-up
Exhaust Fresh-up
Supply Exhaust
Low High
High Ultra high
Exhaust Fresh-up
(Excessive exhaust air supply)
g
c
e
h
f
d
a
a
X24A
i
d
a Air suction/discharge grille
b External damper (field supply)
c Inspection hole
d Switch box
e Heat insulation
f Outdoor air (fresh air from outdoors)
g Exhaust air (exhaust air to outdoors)
h Round shape hood
i PCB
j Power source
Essential wiring
See "6.5.2 Opening the switch box" on
X24A outputs a signal when the supply air fan or exhaust air fan is
running. Configure setting 18(28)-3 to 03 or 04.
8.5.4

About the CO2 sensor

With the CO (carbon dioxide) sensor installed, you can adjust the
2
ventilation volume in function of measured CO
measured concentration value is compared to programmed trigger
values. Make sure that the ventilation mode and air flow rate are set
to automatic.
See "8.2 List of settings" on page 25
▪ Use setting 19(29)‑9‑05 to give control to the CO
▪ Use setting 19(29)‑7 to shift the trigger values.
▪ Use setting 18(28)‑6 to switch between linear and fixed control.
Linear control
Initialising 20 minutes in high
d
b
c
e
h
HRV
b
j
page 17.
concentration. The
2
for the field setting overview.
sensor.
2
Fixed control
20 minutes in high
VAM350~2000J7VEB
Heat reclaim ventilation unit
4P487293-1A – 2018.05
f
g