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Local application factors
* This FTC is designed to connect Mr.Slim/ Ecodan inverter outdoor unit of MITSUBISHI ELECTRIC to local systems. Please check the following when designing the local
system.
* MITSUBISHI ELECTRIC does not take any responsibility for the local system design.
Heat exchanger
(1) Withstanding pressure
Designed pressure of outdoor unit is 4.15 MPa. Following must be satised for burst pressure of connecting application.
Burst pressure: More than 12.45 MPa (3 times more than designed pressure)
(2) Performance
Secure the heat exchanger capacity which meets the following conditions. If the conditions are not met, it may result in malfunction caused by the protection operation
or the outdoor unit may be turned o due to the operation of protection system.
• In case of hot water supply, condense temperature is less than 58°C in max. frequency operation with the outside temperature 7°C D.B./6°C W.B.
(3) Contamination maintenance
1. Wash the inside of heat exchanger to keep it clean. Be sure to RINSE not to leave ux. Do not use chlorine detergent when washing.
2. Be sure that the amount of contamination per unit cubic content of heat transfer pipe is less than the following amount.
Example) In case of Φ9.52 mm
Residual water: 0.6 mg/m, Residual oil: 0.5 mg/m, Solid foreign object: 1.8 mg/m
Thermistor position
Refer to 4.4.
Notes
· Install the hydraulic lter at the water inlet pipework.
· Inlet water temperature of heat exchanger should be within the range 5 °C - 55 °C.
· The water in both primary and sanitary circuit should be clean and with pH value of 6.5-8.0
· The followings are the maximum values;
Calcium: 100 mg/L, Ca hardness: 250 mg/L
Chloride: 100 mg/L, Copper: 0.3 mg/L
· Other constituents should be to European Directive 98/83 EC standards.
· Refrigerant pipe diameter from outdoor unit to refrigerant-water HEX (Only for SPLIT type)
Use the pipe with same diameter size as the refrigerant pipe connection diameter of outdoor unit. (Refer to outdoor unit installation manual.)
· Ensure that there is sucient anti-freeze chemical in the water circuit. It is recommended to use 7 : 4 anti-freeze to water ratio.
· The water velocity in pipes should be kept within certain limits of material to avoid erosion, corrosion and excessive noise generation.
Be aware, and take care of, that local velocities in small pipes, bends and similar obstructions can exceed the values above.
e.g. Copper: 1.5 m/s
WARNING:
· Always use water that meets the above quality requirements. Using water that does not meet these standards may result in damage to the system pipework
and heating components.
· Never use anything other than water as a medium. It may cause a re or an explosion.
· Do not use heated water that is produced by the air to water heat pump directly for drinking or cooking. There is a risk to damage your health. There is also
a risk that installing the water heat exchanger may corrode if the necessary water quality for air to water heat pump system cannot be maintained. If you
wish to use the heated water from the heated pump for these purposes, take measure such as to the second heat exchanger within the water piping system.
· The water quality must comply with European Directive (EU) 2020/2184 standards.
Additional Requirements
1. Important Notice (Fire safety)
R32 is ammable refrigerant, and the re safety warranty for the whole system (including outdoor unit) must be done by your side.
Conformity of regulations (e.g. IEC 60335-2-40) and laws must be conrmed on the system by your side.
2. Flow sensor (Outdoor unit : Packaged model)
Flow sensor (option) is necessary for packaged outdoor unit. Refer to the manual of PAC-FS01-E for details.
3. Pressure relief valve (Outdoor unit : Packaged model)
Do not attach the pressure relief valve to the heating (cooling) circuit on outdoor unit.
The copyright of the fonts displayed on the main remote controller screen belongs to Morisawa Inc..
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