Installation manual

27
!
IMPORTANT
During functioning in heat pump heating mode, the unit performs defrost cycles to eliminate any ice that might
form at low temperatures inside the outdoor unit
Refrigerant charge check
This check becomes necessary after any refrigerant leak
or after replacement of the compressor. The best method
to correctly charge refrigerant is to completely empty the
refrigerant circuit using refrigerant recovery equipment.
Then charge the exact quantity of refrigerant according to
the data shown on the unit nameplate and always
considering the additional charges listed on the charge
sheet.
R-410A systems must be charged with liquid refrigerant.
Use the special recharging equipment (normally on the
market) to control the refrigerant correctly.
!
IMPORTANT
Any works carried out on the refrigerant circuit
must be undertaken by a person holding the
relevant Fgas certification
A: 4 way valve
B: DC Rotary Compressor
C: BPHE
D: Pulse Motor Valve
E: Distributor
F: Fan
G: Heat Exchanger
HTT: High Temperature Thermostat
T1: TS sensor
T2: TD sensor
T3: TR sensor
T4: TE sensor
T5: TO sensor
Ta: EWT sensor
Tb: LWT sensor
A
B
CD
E
F
G
15
Type of Safety Device Operating Condition Release/Reset
Pressure Relief Valve ( Water side - see Fig 8) 300 kPa Self Reset
Flow Switch ( Water side - see Fig 8) > 8 l/min < 6 l/min
High Temperature Thermostat (see Fig 15) > 120 °C < 90 °C
Refrigerant Temperature Sensors (Fig 15 T1 to
T5)
"Failure/Out of Range ( Operating
range depends on sensor
location)"
In Range
Water Temperature Sensors (Fig 15 Ta & Tb) T < 0 °C, T > 70 °C 0°C≥T≤70°C
Anti-Freeze Protection (Fig 15 T5) Adjustable from 2 to 6 °C Software controlled
Compressor Start Acceleration limit 6 accelerations/hr N/A
Delayed Compressor Start (OFF - ON) 180 secs (max) N/A
Delayed Compressor Stop (ON - OFF) 180 secs N/A