Toshiba Estia RUA-CP1701H, Руководство по установке

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8
Monobloc Outdoor Unit Installation Manual
•
Ensure regularly that the vibration levels remain acceptable and close to those at the initial unit start-up.
• When the unit is subjected to fire, safety devices prevent rupture due to over-pressure by releasing the
refrigerant. The fluid may then be decomposed into toxic residues when subjected to the flame:

Stay away from the unit.

Set up warnings and recommendations for personnel in charge to stop the fire.

Fire extinguishers appropriate to the system and the refrigerant type must be easily accessible.
• All factory-installed relief valves are lead-sealed to prevent any calibration change.
• Relief valves must be checked periodically to ensure that they do not show any corrosion or any signs of
leaks.
• Provide a drain in the discharge circuit, close to each relief valve, to avoid an accumulation of condensate or
rain water.
•
All precautions concerning handling of refrigerant must be observed in accordance with local regulations.
• Accumulation of refrigerant in an enclosed space can displace oxygen and cause asphyxiation or explosions
•
Inhalation of high concentrations of vapour is harmful and may cause heart irregularities, unconsciousness, or
death. Vapour is heavier than air and reduces the amount of oxygen available for breathing. These products
cause eye and skin irritation. Decomposition products can be hazardous.
• No part of the unit must be used as a walkway, rack or support. Periodically check and repair if necessary
replace any component or piping that shows signs of damage.
•
Do not climb on a machine. Use a platform, or staging to work at higher levels.
Maintenance safety logbook
Manufacturer recommends the following drafting for a logbook (the table below should not be considered as
reference and does not involve Manufacturer responsibility):
Safety accessory* Damage limitation accessory**
in case of an external fire
Refrigerant side
High-pressure switch
External relief valve***
Rupture disk
Fuse plug
X
X
X
X
Heat transfer fluid side
External relief valve **** ****
* Classified for protection in normal service situations.
** Classified for protection in abnormal service situations.
*** The instantaneous over-pressure limited to 10% of the operating pressure does not apply to this abnormal service
situation. The control pressure can be higher than the service pressure. In this case either the design temperature or
the high pressure switch ensures that the service pressure is not exceeded in normal service situations.
**** The classification of these relief valves must be made by the personnel that completes the whole hydronic
installation.

Notes on system design
•
The inlet water temperature to the Monobloc outdoor unit must be 56°C or less for 21kW Monobloc (59°C or
less for 17kW Monobloc). Care should be taken when there is an external heating source such as a boiler or
external electric heater. When hot water over these limits returns to the Monobloc outdoor unit, it may result in
a failure of the unit or water leakage.
• The flow rate of the circulating water must meet the following range.
17 kW: 0.45 L/sec or more 21 kW: 0.57 L/sec or more
If the flow rate becomes less than the minimum, the protective device is activated to stop the operation.
• To ensure the minimum flow rate of the water system, install a bypass valve on one water circuit.
•
The system operation is designed around a closed water circuit. Do not use an open circuit design.