About Preventing A Feeling Of Draft; About 24-Hour Ventilation; About The Ultra-Low Setting; About The Electrical Heater Operation - Daikin VAM350J7VEB Installer And User Reference Manual

INFORMATION
This function is NOT possible when there is a direct duct
connection.
INFORMATION
This function is NOT possible when the heat reclaim
ventilation unit is NOT linked to an air conditioner.
8.5.7

About preventing a feeling of draft

When heating is on in a setup with air conditioner and the fan is
turned off while the defrost operation is running, the fan of the heat
reclaim ventilation unit is set to low mode or even stopped to prevent
a feeling of draft.
Setting 17(27)‑5 sets the fan mode.
INFORMATION
This function is NOT possible when the heat reclaim
ventilation unit is NOT linked to an air conditioner.
8.5.8

About 24-hour ventilation

When the controller is switched off, 24-hour ventilation starts. Setting
19(29)‑4 enables this function and sets the fan speed.
8.5.9

About the ultra-low setting

If the amount of ventilation is too high, even in low mode, you can
have the fans work intermittently or at a very low speed with setting
19(29)‑1.
INFORMATION
This function is NOT possible when there is a direct duct
connection.
8.5.10

About the electrical heater operation

If the electrical heater is used, set setting 19(29)‑8 to 03 or 04 and
setting 18(28)‑9 to 01. For more details, see the PCB heater manual.
8.5.11

About external linkage input

Terminals J2 and JC function as contact signal input to switch the
heat reclaim ventilation unit on or off.
8.5.12

About filter contamination check

The filter contamination check can ONLY be done in the same
conditions as 19(29)‑0‑04 or 05. E.g., if the unit is operating in
bypass mode, filter contamination CANNOT be checked. In this
case, a timer counts the hours. After a target value is reached, the
conditions are changed for a short time to be able to perform a filter
contamination check.
Setting 18(28)‑11‑02 resets the timer to 0.
Setting 18(28)‑11‑03 performs an immediate filter contamination
check.
After finishing 18(28)‑11‑02 and 03, the setting automatically returns
to 18(28)‑11‑01 and unit operation continues as before. Settings
18(28)‑11‑02 and 03 can ONLY be used when setting 19(29)‑0 is set
to 01 or 02.
INFORMATION
This function is not possible in case of errors.
VAM350~2000J7VEB
Heat reclaim ventilation unit
4P487293-1A – 2018.05
9

Commissioning

9.1

Overview: Commissioning

After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run MUST be
performed according to the procedures described below.
This chapter describes what you have to do and know to
commission the system after it is configured.
Commissioning typically consists of the following stages:
1 Checking the "Checklist before commissioning".
2 Performing a test run.
3 If necessary, correcting errors after abnormal completion of the
test run.
4 Operating the system.
9.2

Precautions when commissioning

DANGER: RISK OF ELECTROCUTION
CAUTION
Do NOT perform the test operation while working on
the indoor units, the outdoor unit or the heat reclaim
ventilation units.
When performing the test operation, NOT only the unit to
which the controller is connected will operate, but all units
that are linked to this one as well. Working on an indoor
unit or the heat reclaim ventilation unit while performing a
test operation is dangerous.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it will
cause injury.
9.3

Checklist before commissioning

After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit MUST be closed, ONLY then
can the unit be powered up.
You read the complete installation and operation
instructions, as described in the installer and user
reference guide.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
Be sure that the field wiring has been carried out
according to the instructions described in
wiring" on page 17, according to the wiring diagrams and
according to the applicable legislation.
Power supply voltage
Check the power supply voltage on the local supply panel.
The voltage MUST correspond to the voltage on the
identification label of the unit.
Earth wiring
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500 V DC between power terminals and earth.
NEVER use the megatester for the transmission wiring.
9 Commissioning
"6.5 Electrical
Installer and user reference guide
39