Daikin VKM50GAV1, Service Manual

Page: 27 / 107

Operation Si71-812
18 Operation
1.4 Restrictions to Control System
1.4.1 Do not Give VKM-GA(M) Model a Function to Select Cooling/Heating.
(This is because the operation mode switches automatically
depending on the outdoor conditions regardless of the indoor
temperature when set to "Automatic".)
1.4.2 Caution when Connecting with a VRV System, Heat Recovery Type
When bringing the RA (exhaust gas intake) of this unit directly in from the ceiling, connect to a BS unit
identical to the VRV indoor unit (master unit), and use group-linked operation.
Caution
If above setting is not made, the detection of correct temperature is not available and automatic judgment
on proper cooling or heating can not be made when the temperature in the ceiling gets higher than indoor
temperature.
Poor heating or shortage of the amount of humidification may result.
If the indoor unit and this unit are installed with different BS system inevitably, always take following
remedies (1) and (2).
(1) RA (Exhaust and suction) of this unit is not taken directly from inside of the ceiling, connect the suction
duct and suction grille to the fitting port of RA duct to suck the indoor air.
(2) Do not make the selection of heating or cooling in automatic mode and it shall be made by manual
selection from remote controller or centralized controller.
Give a function to select cooling/heating to either one of these.
EA
OA
RA
SA
•
The system must be operated interlocking
with the air conditioner.
BS Unit BS Unit
Give a function to select cooling/heating to either one of these.
Outdoor unit for heat recovery
EA
OA
RA
SA
Give a function to select cooling/heating to either one of these.
BS Unit BS Unit
Outdoor unit for heat recovery
Suction
grille