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Hitachi RAS-80YH5A - Page 48

Hitachi RAS-80YH5A
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– 55 –
0.66°C
SFTDSW
control by heat
Control by heat
control by heat
Control by heat
Control by
TWMAX
Notes:
1. Condition for entering into hot dashed mode: when fan set to Hi or Auto mode and i) indoor temperature is lower than 18°C, and ii) outdoor temperature is lower than 10°C, and iii) temperature
difference between indoor temperature and set temperature + SHIFTW has a corresponding compressor rpm (calculated in Table 3) larger than WMAX.
2. Hot dashed will release (the maximum compressor speed during hot dash is finish) when i) room temperature has achieved the set temperature + SHIFTW + SFTDSW or ii) Thermo OFF.
3. During hot dash operation, thermo off temperature is set temperature + SHIFTW +3°C. After thermo off, operation continue in fuzzy control mode.
4. Compressor minimum ON time and OFF time is 3 minutes.
5. The time limit for which the maximum compressor (WMAX) or (WMAX2) during normal heating (except for hot dash) can be maintained in less than 120 minutes when the room temperature is higher
than 18°C. No time limit if room temperature is less than 18°C and outdoor temperature is lower than 2°C.
6. The operation indication lamps blinks at interval of 3 seconds ON and 0.5 seconds OFF during initial cycle operation, preheating, defrosting (including balance time after defrosting is finished) or
auto fresh defrosting.
7. When heating mode start, it will enter into hotkeep (preheating) if indoor heat exchanger temperature is lower than YNEOF +0.33°C and it will not enter if indoor heat exchanger temperature is equal
or higher than YNEOF +0.33°C at the start of operation by using START/STOP button.
8. The limitation of compressor speed during the operation at indoor fan speed of Med is set to WJKMAX or below LO is set to WBEMAX or below and SILENT is set to WSZMAX or below.
9. If the room temperature falls less than 18°C in the Ultra Lo fan mode, the indoor fan stops. When the room temperature is 18°C +0.33 or higher, the Ultro Lo operation restarts. However the
Ultra-Lo operation during preheating or preheating after defrosting will stop if the heat exchanger temperature is less than 16°C.
10. During Hot Dash and outdoor temperature lower than -5°C, maximum compressor rpm is WMAX2.
11. During Hot Dash and room temperature reaches set temperature + SFTDSW, compressor rpm is actual rpm x DWNRATEW.
Table 3 TWMAX
1.66 2300
2.00 2300
2.33 2300
2.66 2800
3.00 2800
3.33 2800
3.66 3300
4.00 3300
4.33 3300
4.66 3800
5.00 3800
6.00 4300
6.33 4300
6.66 4800
7.00 4800
7.33 4800
7.66 5300
8.00 5300
8.33 5300
8.66 5800
9.00 5800
9.33 5800
9.66 6300
10.00 6300
10.33 6300
10.66 6800
11.00 6800
Temperature
difference
Calculated compressor
rpm

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