Electrical Wiring - Rinnai DONSR20Z9 Operation & Installation Manual

19.9 Refrigerant Amount to be Added
Calculate the added refrigerant according to the diameter and the length of the liquid side pipe of the outdoor unit/
indoor unit connection.
Liquid Side Piping Diameter
Φ6.4
Φ9.5
Φ12.7
Φ15.9
Φ19.1
Φ22.2
Additional refrigerant volume of divergent pipe is 0.05kg per item (Consider the liquid side of
divergent pipe only).
NOTE

20. ELECTRICAL WIRING

• Design a dedicated power supply for the indoor unit and outdoor unit.
• If the power supply uses a branch loop, install an electricity leakage protector and a manual
CAUTION
switch.
• The power supply, electric leakage protectors, and manual switches of the indoor units that
connect to the same outdoor unit must be universal. Use the same loop for the indoor unit
power connect to the same outdoor unit must be universal. Use the same loop for the indoor
unit power supplies in the same system. Power on/off at the same time.
• Incorporate the outdoor unit and indoor unit connection wiring system and refrigerant pipe
system for the same system.
• To reduce interference, use a three-core shielded twisted pair as the outdoor unit signal
cable. Do not use a multi-core cable.
• Complete wiring according to national electrical standards.
• Employ an electrical engineer for wiring.
Rinnai
Refrigerant to be Added
Perimeter Piping
0.022kg
0.057kg(>22.4kW)
0.054kg(≤22.4kW)
0.110kg
0.170kg
0.260kg
0.360kg
41
INSTALLATION OUTDOOR
Ducted Reverse Cycle Inverter Installation Manual