Heat Pump Functions - Fujitsu WSYA050ML3 Design & Technical Manual

3-9. Heat pump functions

Line Access
Pump speed maximum
2779 I condenser pump cooling
mode
Pump speed maximum
2793 I
condenser pump
Overrun time condenser
2803 S
pump
Compressor off time
2843 S
minimum
Switch-off temperature
2844 S
maximum
2862 S Locking time stage 2/mod
2873 S Compressor mod run time
2882 S Release integral electric flow 0...500°Cmin
Flow electricity release at OT
2884 S Electrical release - start-up
with outside temperature
Minimum flow switch
2899 I
consumers
Maximum setpoint HP DHW
2916 S
charge
With electrical utility lock
S
(EX1)
Released: HP = ON _ Back-up DHW = off _ 1st back-up HP = off _ 2nd back-up HP = off _ Boiler =
2920
ON
Locked (Blocked on standby): HP = off _ Backup DHW = off _ 1st backup HP = off _ 2nd backup
HP = off _ Boiler = ON
3026 S Silent mode on
3027 S Silent mode off
Silent mode speed increase
3028 S
start
Silent mode speed increase
3029 S
end
• Overrun time condenser pump
When the compressor is switched off, the condenser pump continues to run for the set overrun
time.
• Compressor off time minimum
For the same reason, the compressor remains switched off for the minimum period of time set
here. Switch-off temperature maximum if the flow or the return temperature exceeds the maximum
switch-off temperature, the compressor will be switched off. The heat pump is switched on again
when the temperature at both sensors has dropped by the "Switching difference return tempera-
ture" below the maximum switch-off temperature and the minimum off time has elapsed.
• Switch-off temperature maximum
If the flow or the return temperature exceeds the maximum switch off temperature, the compressor
will be switched off.
Example (line 2844): Floor heating system = 55°C (Higher temperature radiator = 65°C)
• Locking time stage 2
When compressor is restarted, the time which keeps minimum capacity can be adjusted. Efficien-
cy become better, however the time of rising capacity becomes long.
3-9. Heat pump functions
Function Setting range or display
0...100%
0...100%
8...240 seconds
0...120 minutes
8...100°C
0...40 min
10...600 s
-30...30°C
1...1,200 l/h
8...80°C
Locked (Blocked on standby),
Released
00:00...--:--
00:00...--:--
-50...50°C
-50...50°C
- (03-37) -
Setting Factory
increment setting
1% 100%
1% 100%
1 second 240 seconds
1 minute 8 minutes
1°C 75°C
1 minute 5 minutes
1 second 240 seconds
1°Cmin 100°Cmin
2°C
1 l/h 600 l/h
60°C
Released
10 minutes 22:00
10 minutes 07:00
1°C 8°C
1°C 7°C
3. Function table