Toshiba Estia RUA-CP1701H, Руководство по обслуживанию

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Monobloc Outdoor Unit Service Manual
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Main pump control logic in standby mode
Main Pump Logic
[P565] No
RC
Local
RC
Remote
RC
OFF
Mode
Cooling / Heating Mode Boiler
Satisfied
Demand
Demand On Off
Always On [P565]=1
  
Off On On Off N.A.
Water Sampling
[P565]=2
 
N.A. Off
Off (On for
sampling)
On Off N.A.
According to Space
Temp [P565]=3
N.A. N.A.

Off
According to
IAT vs Air
Setpoint
On Off N.A.
•
Main pump anti-sticking function (periodic start up)
The periodical pump start-up function is used to control the pumps when the unit is stopped for about 24 hours.
When the outside air temperature is low, the risk of frost formation on the cooler side increases, hence the water
exchanger pump should be turned on.
Starting the pump periodically for a few seconds increases the lifetime of the pump bearings and the tightness of the
pump seal.
•
If the periodical pump quick start is configured, the pump will be started for 2 minutes each time after being
stopped for 24 hours.
•
For the variable speed pump, the pump will run at its minimum speed when this override (periodical pump
start-up) is active.
The water pump anti-sticking function is set using parameter [P563] – pump speed in DHW mode (dhw_vsp):
Par.No Description Range Default
563
Pump anti-sticking function – (pmp_stck): (-)
0(No)~1 (Yes) 1 (Yes)
•
Additional pump control (external pump – locally sourced)
The RUA-CP170 / 2101H Monobloc units can also control an additional water pump installed in the water circuit.
[P573] is used to configure the system to control and additional external pump. The control logic options for an
additional external pump are shown below:
Par.No Description Range Default
573
Additional pump logic – (add_pmp): (-)
0 ~ 4 0)
[P573] Configuration Description
0 Disabled

Pump is not controlled
1 Always on

Pump is always running except for the Off mode
2 According to space temperature

Pump is running according to the demand coming from the Indoor Air
Temp vs. the Air Control Point (WUI remote or IAT sensor configured
as thermostat)
3 Always on, but Off when DHW is
active

Pump is always running except for the Off Mode or when DHW Mode
is active
4 According to space temperature
but Off when DHW is active

Pump is running according to the demand coming from the Indoor Air
Temp vs. the Air Control Point (WUI remote or IAT sensor configured
as thermostat)

Pump is stopped if DHW Mode is active
Note:

The installer is responsible for ensuring the protection of any additional pump against the low water flow rate
(no additional flow switch can be managed by unit control).

When the anti-sticking function is enabled [P563] and the additional pump has not been running for more than
24 hours, then the pump will be started in order ensure the correct operation of the pump.