Daikin VAM Series Engineering Data Download

Page: 9 / 188

EDMMT712101

Product Introduction

VAM-HVE/HVLT Series

Automatically switches the ventilation mode (Total Heat Exchange Mode/Bypass Mode) according to the
operating status of the air conditioner.

When the cooling operation is required in winter, use of heat recovery ventilation is not efficient because
the outdoor air temperature is normally lower than that of the indoor. Thus, the proper use of ventilation
mode enhances the heating / cooling efficiency.

In addition by installing a humidity sensor (optional), automatic switching by heat (energy) or discomfort
index is possible which further improves energy efficiency and comfort.

Nighttime free cooling operation is an energy-conserving function that works at night when air conditioners are off. By
ventilating rooms containing office equipment that raises the room temperature, nighttime free cooling operation reduce
the cooling load when air conditioners are turned on in the morning. It also alleviates feelings of discomfort in the morning
caused by heat accumulated during the night.

Auto-ventilation Mode Changeover Switching

Total Heat Exchange Mode

(Cooling operation in summer/Heating operation in winter)

Bypass Mode

(“Intermediate” season)

Heat exchange element

Indoor air temperature sensor

Outdoor air temperature sensor

Outdoor air intake

Exhaust air

Supply air

Return air

Heat exchange element

Indoor air temperature sensor

Air supply fan

Air exhaust fan

(Intermediate season)

The air cannot be supplied

at the same temperature
as the outdoor air because
it is partly heat-exchanged.

Outdoor air temperature sensor

Air supply fan

Air exhaust fan

Supply air

Return air

Outdoor air intake

Exhaust air

- When connected to air conditioners, operation of
heat reclaim ventilator is controlled according to the
set temperature, outside air temperature and room
temperature.

- When using only ventilation unit, operation of heat
reclaim ventilator is controlled according to the set
temperature on remote controller.

- Nighttime free cooling operation is possible during
air conditioners linked operation by centralized
control.

- Nighttime free cooling operation is set to “off” in the
factory settings, so if there is a need to turn on, please
contact Daikin dealer

The indoor accumulated heat is discharged at night.
This reduces the air conditioning load the next day thereby increasing
efficiency.

Heat is discharged.

The load is small so the temperature is
rapidly reduced to a comfortable level.

*Interlocked operation with an air conditioner

Nighttime free cooling operation

I m p r o v e d i n s t a l l a t i o n m e t h o d

1. Improved installation process by changing the dimension and shape
of lifting lug

- The nut dropout prevention structure eliminates the need to replace the lifting lug
even when mounting upside down.
- It also prevents the anti-vibration lifting lug from interfering with the equipment.

- The duct connector is adjusted to be parallel to each other in order to ease duct
installation process.

- Operation, ventilation volume, and ventilation mode can be switched by external contact input.
- Output signal terminal for external dampers.
- Output signal terminal for abnormal signals and filter signs.

2. Improved duct installation process with new duct connector location

3. Improves controllability by input / output signals and simplifies various wiring work