Detailed Explanation Of Settings; To Monitor The Unit's Operation; About Fresh-Up Operation - Daikin VAM350J7VEB Installer And User Reference Manual

In this mode, the outdoor air passes through the heat exchange
element to effect Heat Reclaim Ventilation.
" " Bypass mode
In this mode, the outdoor air does NOT pass through the heat
exchange element, but bypasses it to effect Bypass ventilation.
5 Indication of operation control method:
When operation of the heat reclaim ventilation units is linked to
the air conditioners, this indication may be displayed. While this
indication is displayed, the heat reclaim ventilation units
CANNOT be turned on or off with the controller of the heat
reclaim ventilation units.
6 Indication of operation standby:
This icon indicates that the unit is precooling/preheating. The
unit's start-up is delayed until precooling/preheating is finished.
Precooling/preheating means that the heat reclaim ventilation
units are NOT started while linked air conditioners are starting
up, for example, before office hours.
During this period, the cooling or heating load is reduced to
bring the room temperature to the set temperature in a short
time.
7 Indication of central control:
When a controller for air conditioners or devices for central
control are connected to the heat reclaim ventilation units, this
icon may be displayed.
While this indication is displayed, you may NOT be able to turn
the heat reclaim ventilation units on or off, or use the timer
function with the controller of the heat reclaim ventilation unit.
8 Indication of air filter cleaning
When the display shows "
9 Filter signal reset button
10 Inspection button
Use this button ONLY when servicing the unit.
11 Schedule timer button:
This button enables or disables the schedule timer.
12 Time adjust button:
13 Programming button: /
To set the timer
1 Press the schedule timer button.
2 Press the time adjust button to set the time.
3 Press the programming button to save the setting.
8.5

Detailed explanation of settings

8.5.1

To monitor the unit's operation

Prerequisite: Connect the adapter PCB BRP4A50A to monitor
operation.
1 Plug the connector of the adapter PCB BRP4A50A into the
X33A port.
Supply Fresh-up
(Excessive outdoor air supply)
Detail Supply air volume can be set at a higher level than the
exhaust air by the controller.
Main effects ▪ Prevents inflow of toilet odours.
▪ Prevents inflow of outdoor air in winter.
Application Offices, etc.
VAM350~2000J7VEB
Heat reclaim ventilation unit
4P487293-1A – 2018.05
", clean the air filter.
/
b
a
X1
X2
e
a Operation lamp
b Power source
c Power source
d Heat reclaim ventilation unit's PCB
e Adapter PCB (BRP4A50A)
If X1 and X2 are connected like in the figure, then, depending on
setting 18(28)‑9, a signal is output when the unit is ON and/or when
it is in 24-hour ventilation.
If X3 and X4 are also connected to BRP4A50A, then, depending on
setting 18(28)‑9, a second signal can be output about fan operation
or when the unit is in error. If a heater is connected, the signal is
output to the heater.
8.5.2

About fresh-up operation

Purpose
When combined with a local ventilation fan, such as the ones in
bathrooms or kitchens, the air flow rate of the heat reclaim
ventilation unit is balanced by either fan operation or exhaust
operation. However, a circuit with voltage and low current (16 V,
10 mA) is formed between JC and J1, so you MUST use a relay with
low-load contact.
Function
The unit performs overcharged operation to prevent odour flowing
back.
Necessary parts
Operation contact of exhaust ventilation fan (field supply)
Example of control wiring:
a
J1
b
JC
a Connecting line can be extended to up to 50 m
b Fan (field supply)
c PCB
System description:
a
b
a Local ventilation fan
b Power supply
You can select either excessive supply mode or excessive exhaust
mode. This function creates a more comfortable environment.
Exhaust Fresh-up
(Excessive exhaust air supply)
Exhaust air volume can be set at a higher level than the
supply air by the controller.
▪ Prevents outflow of airborne infectants from hospital
rooms.
▪ Prevents outflow of odours from rooms in nursing
homes.
Hospitals, nursing homes, etc.
8 Configuration
c
L . N
X33A
d
c
Installer and user reference guide
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