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(2) Add the specified amount of glycol anti freeze to the circulating water. The use of specified
anti freeze is also permitted. Care should be taken when selecting the chemicals to ensure
they do not corrode the water plate heat exchanger or pipework.
Note 8) Air heat exchanger clogging
Periodically inspect the air heat exchanger for clogging at regular intervals. If the coil is
clogged, use a brush, a vacuum cleaner, pressurized air, or other means to remove dirt from
between the fins. If heavily stained, remove the fan deck and apply low-pressure water from
inside the coil. At this time, shut down the power and take care to avoid getting water on the
fan motor and electrical components.
Note 9) Replacing the fan motor
The fan motor uses an oil-free bearing, so replenishment of lubricating oil is not required. If the
noise level from the fan becomes to loud, the fan motor needs to be replaced.
Note 10) Pump Maintenance
The daily maintenance procedures for the water pump are shown on page 175 "Pump
Maintenance".
Note 11) Refrigerant oil
This unit uses special refrigerant oil (RB74AF). Do not mix it with other oils.
Note 12) Refrigerant recovery and charging
This unit uses R32 refrigerant, which is a near-azeotropic mixture with an ozone depletion
potential of 0. When charging the refrigerant, be sure to use R32 only. The table below shows
enclosed capacities and global warming potential (GWP). In the event of a refrigerant leak, the
systems refrigerant will need to be recovered and the leaks repaired. Once recovered, check
for leaks, vacuum the system and then charge the system to the specified refrigerant amount.
The system must be charged as a liquid and from the liquid line service port. Issues can arise
when charging the system as a gas result in the refrigerant turning into a two phase mixture.
composition changes are highly likely when charging as a gas so it is highly important to
charge as a liquid.
Refrigerant
Type Number Enclosed capacity (kg) Global Warming Potential (GWP)
HFC R32
35.2
675
Note 13) Disposing of heat pump
Ask a fluorocarbon recovery company when disposing of the unit in accordance with said Act.
Note 14) Relocation of heat pump
Ask your original dealer or local Toshiba Carrier representative for relocation work. Inadequate
installation may cause malfunction, electric shock or fire.
Never use anything other than the specified refrigerant (R32) when refilling or changing.
If a refrigerant other than that specified is used, it could cause the heater to break or rupture
and cause an injury.
Note
