Daikin VKM100GAMV1, Service Manual

Page: 55 / 107

Control Functions Si71-812
46 Control Functions
1. Control Functions
1.1 Explanation of individual Functions
1.1.1 Nighttime Free Cooling Operation
„
Mechanism
<Operation>
1. Interlocking operation is carried
out with the air-conditioning
machine, and the time of 2 hours
passing after an operation stop is
judged to be night.
(The same judgment as the
present preparatory operation)
2. After 2-hour progress, when
indoor temperature is higher than
the preset temperature of an air-
conditioning machine and higher
than outdoor temperature,
operation is started.
3. Operation will be stopped if indoor
temperature falls to air-
conditioning machine preset temperature.
„
Effect (Field Setting by remote controller)
It is reduction of about 5% of air-conditioning load at the time of cooling operation.
Air conditioning operation carries out to April to October, and air-conditioning load is calculated only with
sensible heat load.
Note: Nighttime free cooling operation setting can be set using field setting mode remote controller.
In detail, refer to page 85.
Stop
Night Morning
Heat Release Heat Release
Cold Air
In case of interlocking operation with an air conditioner
Heat
Reserve Heat
Reserve
Heat Release Heat Release
Heat
Reserve Heat
Reserve
Generation of heat with a PC etc. and
its heat are reserved to a wall ,ceiling.
Heat is discharged
The load of air conditioner is large and
temperature does not fall easily.
There is little load and it is to comfortable
temp.immediately
The heat which accumulated
indoors is discharged at night.
Air Conditioning load of the next
day is reduced, and efficiency is
increased.
Not operation
Nighttime Free
Cooling Operation
40
20
30
Setting Temp.
OFF
ON
Indoor Temp.
Outdoor Temp.
2Hours
Temp.
OFF
ON
Auto Start
Start
HRV
Air
Conditioner