Heater Control - Daikin VRV - WII Service Manual

Outline of Control (Indoor Unit)
9.8

Heater Control

The heater control is conducted in the following manner.
[Normal control]
While in heating operation, the heater
control (ON/OFF) is conducted as shown
on the right.
[Overload control]
When the system is overloaded in
heating operation, the heater will be
turned OFF in the following two
manners.
(1) The heater control (ON/OFF) is
(2) The heater control (ON/OFF) is
[Fan residual operation]
While the heater turns OFF, in order to prevent the activation of the thermal protector, the fan
conducts residual operation for a given period of time after the heater turns OFF. (This operation is
conducted regardless of with or without heater equipped.)
Residual operation time = 100 seconds on ceiling suspended type or 60 seconds on other types
90
conducted through the liquid pipe
temperature (R2T) of the indoor
unit.
conducted by converting the
heater temperature into the
condensing pressure equivalent
saturated temperature (Tc)
according to the temperature
detection through the high
pressure sensor (SINPH) of the outside unit.
ON
ON 109.4ºF
ON 122ºF
SiUS30-604
Set temperature
3.6ºF 3.6ºF
122ºF Liquid pipe temperature
OFF
Condensing pressure
140ºF
equivalent saturated
temperature
OFF
OFF
Function