Detailed Explanation Of Settings; About Fresh-Up Operation - Daikin VAM-J8 Series Manual

17 | Configuration

17.5 Detailed explanation of settings

17.5.1 About fresh-up operation

Supply Fresh-up
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 hot/cold outdoor air.
Application Offices, etc.
Installer and user reference guide
88
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
b
a Connecting line can be extended to up to 50 m
b Fan (field supply)
c PCB
System description:
a
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.
J1
c
JC
b
Exhaust Fresh-up
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.
VAM350~2000J8VEB
Heat reclaim ventilation unit
4P664012-1 – 2021.08