Daikin VAM2000J8VEB - About the External Damper Operation

17 | Configuration
Installer and user reference guide
89
VAM350~2000J8VEB
Heat reclaim ventilation unit
4P664012-1 – 2021.08
Supply Fresh-up Exhaust Fresh-up
Example
b
a
e
c
d
g
f
h
c
d
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‑3 and J1,
JC:
Setting
(a)
Description J1/JC Normally
open
J1/JC Normally
closed
1A‑3‑01 Fresh-up "OFF" (factory setting) Normal Fresh-up
1A‑3‑02 Fresh-up "ON" Fresh-up Fresh-up
(a)
See "17.2Field settings"[472].
The unit's fresh-up operation corresponds with the following fan operation:
Supply Fresh-up Exhaust Fresh-up
Supply Exhaust Supply Exhaust
Weak High Low Low High
Strong Ultra high High High Ultra high
17.5.2 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.