About The External Damper Operation - Daikin VAM350J VEB Series User Reference Manual

17.5.2 About the external damper operation

VAM350~2000J*VEB*
Heat reclaim ventilation unit
4P664012-1A – 2024.01
▪ 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‑3 and J1,
JC:
(a)
Setting Description
1A‑3‑01 Fresh-up "OFF" (factory setting) Normal
1A‑3‑02 Fresh-up "ON"
(a)
See "17.2 Field settings" [
The unit's fresh-up operation corresponds with the following fan operation:
Weak
Strong
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.
a
a
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 "15.2 Opening the switch
4
72].
Supply Fresh-up
Supply Exhaust
High Low
Ultra high High
d
c
e
HRV
b
j
X24A
i
4
box" [ 54].
17 Configuration
|
J1/JC Normally J1/JC Normally
open closed
Fresh-up
Fresh-up Fresh-up
Exhaust Fresh-up
Supply
Low
High
b
f
h
g
Installer and user reference guide
Exhaust
High
Ultra high
89