Toshiba Estia RUA-CP1701H, Руководство по обслуживанию

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Monobloc Outdoor Unit Service Manual
40
8.2.6.
Simultaneous Cooling and Domestic Hot Water Operation:
It is possible to operate the ESTIA Monobloc system with both space heating and domestic hot water modes selected
on the remote controller / software parameters. The operating mode is selected as detailed below and depends on the
outdoor air temperature (OAT).
•
Cooling and DHW simultaneous control:
[1] When the system is operating in space cooling (SC) mode and the Space Cooling Minimum Runtime [P704]
has elapsed AND the temperature of the water, inside the DHW cylinder, is less than CTRL_PNT [P406] -
∆
T
DHW Start [P721] then the system will STOP space Cooling and will change over to DHW production mode. The
operating sequence for the system at this point is:
•
The compressor continues to run
•
The water pump continues to run
•
The 3 way valve changes position to allow DHW production
•
The DHW Set point [P406] is displayed on the remote controller
•
The electric heater, for the DHW cylinder is allowed to start
[2] The system will operate in DHW production mode until DHW_TT > CTRL_PNT [P406] – 1K [P722] OR until the
DHW Maximum Runtime [P707] At this point the DHW temperature, inside the DHW cylinder, will be satisfied
and the system will change back to space heating operation
NOTE:
The DHW, inside the DHW cylinder, will be produced using only the electric heater installed in the cylinder under the
following conditions:
•
OAT < Minimum OAT for cooling [P516]
•
OAT > Maximum OAT for heating [P515]
•
If there is a fault on the ESTIA Monobloc outdoor unit
Related Parameters for Simultaneous Cooling and DHW Control:
In addition to the parameters detailed for DHW only and Cooling only operation the following parameters are related to
the simultaneous Cooling and DHW system control
Par.No Description Range Default
704 SHC minimum runtime – (shc_min): [min] 0 ~ 720 20
707 DHW maximum runtime – (dhw_max): [min] -1(or 30)~720* 60
*If [P707] is configured to -1 then the DHW maximum runtime is ignored
Space Cooling Mode
OFF
∆T Start [P721]
Space Cooling Setpoint
ON
DHW Operation
OFF
ON
∆T Stop [P722]
[1] [2] [1] [2]
DHW Setpoint [P406]