About The External Damper Operation - Daikin VAM-J8 Series Manual

Supply Fresh-up
a
Example
c

17.5.2 About the external damper operation

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