Table 3: Actions In Wui Parameter Menu Or Service Tools To Activate The Cleaning Purge And Control Of Flow Rate For Hydraulic Circuit - Riello NXHP Series Installation, Operation And Maintenance Instructions

2 - INSTALLATION OF UNIT
Table 3: Actions in WUI parameter menu or Service tools to activate the cleaning purge and control of flow
Steps
Cleaning procedure
Purge procedure
Variable speed
pump – control
on adjustable
constant speed
Water flow
control
procedure
Variable speed
pump - control
on ΔT
Determine Variable speed
the min pump:
pump - control on
speed adjustable
to allow constant speed
closure of - and control
flow switch on ΔT
NOTE:
If the system has an excessive pressure drop in relation to the available static pressure provided by the system pump the
nominal water flow rate cannot be obtained (the resulting flow rate is lower) and the temperature difference between the
water heat exchanger entering and leaving water will increase.
To reduce the pressure drops of the hydraulic system:
■ Reduce the individual pressure drops as much as possible (bends, level changes, options, etc.).
■ Use a correctly sized piping diameter.
■ Avoid hydraulic system extensions, wherever possible.
rate for hydraulic circuit
Table Par. Designation
321 Quick Test enable
330 Water Pump Speed
QCK_
Wait approximately 2h that the hydraulic circuit is cleaned
TEST
330 Water Pump Speed
321 Quick Test enable
System Mode
44
Request
MOD_
REQ
System Mode
44
Request
321 Quick Test enable
330 Water Pump Speed
QCK_
TEST
330 Water Pump Speed
321 Quick Test enable
Var Speed Pump
566
Logic
PMP_
CONF
Maximum Pump
568
Speed
Var Speed Pump
566
Logic
PMP_
CONF
569 Water Delta T
Setpoint
321 Quick Test enable
QCK_
TEST 329 Get Minimum Pump
Speed
321 Quick Test enable
Description
Access to Quick test mode
Activate the pump
Stop the pump
Exit the Quick test mode
8 = Purge (water pump is constantly
running to purge the hydraulic circuit)
0 to 6 and 9 = not used for this
configuration
Wait that the circuit purges
To exit purge mode, change the value of
[P044] with the wanted mode (0 or 1 or 2
or 4)
Access to Quick test mode
Adjust water pump speed until obtain the
expected design water flow (refer to
Graphics 3 and 4).
When the pump speed is identified, stop
the pump.
Exit the quick mode
0 = Adjustable Constant Speed (use
[P568] parameter to set the water pump
constant speed)
1 = not used for this configuration
If variable speed pump configuation is
set to adjustable speed, then the
maximum pump speed parameter
corresponds to the design water flow.
1 = Water pump Speed controlled by the
Water Delta T
0 = not used for this configuration
Set a ΔT value
To determine the minimum pump speed
in function of pressure drop and closing
of flow switch of hydraulic circuit,
activate the quick test
Launch the automatic procedure to get
the minimum pump speed.
Pump speed will be slowly increased
until flow switch is closing. Par.567
""Minimum Pump Speed"" will
automatically be updated
When the minimum pump speed is
determined, exit of quick test mode
Range Default Ex. Unit
0 to 1 0 1
0 to 100 0 100
0 to 100 0 0
0 to 1 0 0
0 to 9 - 8
0 to 9 - 0 / 1 /2 /4
0 to 1 0 1
0 to 100 0 ?
0 to 100 0 0
0 to 1 0 0
0 to 1 1 0
Enter
pump
50 to speed
100
100 determined
at last step
[P330]
0 to 1 1 1
2,0 to
5 5
20,0
0 to 1 0 1
0 to 1 0 1
0 to 1 0 0
-
%
%
-
-
-
-
%
%
-
-
%
-
K
-
-
-
31