Monobloc Outdoor Unit Service Manual
52
Operating Mode
Conditions
Action
DHW Mode
Heat demand exists
Pump is running
Heat satisfied and Pump Logic = 1 “Always ON”
Pump is running
Heat satisfied and Pump Logic = 2 “Water Sampling”
Pump is running periodically
Cooling Mode
Cool demand exists
Pump is running
Cool satisfied and Pump Logic = 1 “Always ON”
Pump is running
Cool satisfied and Pump Logic = 2 “Water Sampling”
Pump is running periodically
Purge Mode
The flow switch status is not taken in account
Pump is running
Defrost mode
-
Pump is running
Header / Follower
Header/Follower Pump type (Par. 758) is used to define pump control for units
operating in the assembly:
0 = No pump control
1 = Common Water Pump; a pump is installed outside the unit on the water loop and
it is controlled by the Header
2 = Individual Water Pump: Running according to the Header/Follower overall status
(Par. 229); each Header or Follower unit has its own pump
3 = Individual Water Pump: Pump is stopped when the unit is satisfied.
•
No Internal Pump Option (pmp_type = 0)
If no internal main pump is fitted then parameter [P804] = 0. There are 2 control options for the no internal main pump
configuration:
•
Either the external main pump is not controlled by the unit and
External Main Pump Control
parameter
[P561]
is set to
“No” (0)
(then the pump relay of the NHC board is forced to off)
OR
•
The external main pump is controlled by the unit and the External Main Pump Control parameter
[P561]
is set
to "Yes" (1) (then the pump relay of the NHC board can be used to control an external (customer) pump).
Note: The External Main Pump Ctrl parameter [P561] is only enable the Factory set parameter [P804] is set to 0 (no
internal pump available)
It is recommended to control the external pump using a relay / contactor connected to TB X2, on the Monobloc
outdoor unit, as shown below:
Related
Parameters for external main pump control:
Par.No
Description
Range
Default
561
External main pump control – (pmp_ext):
0 ~ 1
0
Содержание Estia RUA-CP1701H
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