Heating Starting Process - Fujitsu Airstage J-II Service Manual

(2) Heating starting process

At the start of heating, the compressor is started by the following process. Compressor start-up
to change the 4 way valve. Capacity control returns to normal control after the end of the starting process.
(target high-pressure control)
< Starting process >
Starting process 3 minutes elapsed from start of process
High-pressure
Starting process 20 minutes elapsed from start of process
High-pressure
Discharge SH
*However, when the following condition (A) or (B) are satisfied, starting process is not performed.
< Conditions under which starting process is not performed >
(A) The compressor temperature
( Thermostat - OFF controlling )
(B) The compressor temperature
< Operation >
Compressor operates based on the required capacity at the start up, after that the target high-pressure
control begins.
(3) Limits the upper limit speed of the INV compressor according to the present high-pressure value.
High Pressure
3.60MPa
3.30MPa
(Maximum) 3.00MPa
Compressor operation speed
Starting process Starting process
4rps/Min
32rps fixed
Cancel conditions
or
2.63MPa
or
2.63MPa
or
10 and Discharge temperature
32 , when the room temperature reached to the setting temperature
32 , when the system keeps heating mode with stop condition
Maximum speed = 80rps
Maximum speed = 90rps
Maximum speed = 95rps
[ a ]
Maximum speed = 100rps
[ a ] = 1.25
Normal control
10
Low pressure value 2.125
02-04