Major System Components - Riello NXHP Series Installation, Operation And Maintenance Instructions
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4 -OPERATION
The Drying Mode will be deactivated after 12 days and the unit will switch to Off Mode.
Steps
Table
Configure the
number of days in
DRYING
drying mode
DRYING
Configure the
water temperature
WAT_STP 401 Heat Home
for drying mode
Activate the drying
MOD_
mode
REQ
4.3 - Major system components
4.3.1 - General – Refrigerant part
Components
B
Twin rotary compressor
C
4-Way valve
D
Brazed Plate Heat Exchanger
E
Receiver (008-010-012-014)
F
Electronic expansion valve
G
Round Tube Plate Fin coil
H
Accumulator
I
Burst disk
J
Variable-speed water pump circulator
K
Safety valve
L
Air vent
M
Fan (one or two)
N
Schrader valve (1/2 UNF)
60
Par. Designation
596 Drying Warm-up days
597 Drying Ramp-up days
598 Drying Hold-up days
595 Drying Starting Setpoint
Setpoint
44 System Mode Request
Electronics Boards
A
NHC (main control board)
B
Inverter
Description
Number of Warm-up days
Number of Ramp-up days
Number of Hold-up days
Water setpoint to warm-up days
Water setpoint for ramp-up and hold up days
0 = Off
1 = Cool
2 = Heat
4 = DHW
5 = Booster Cooling
6 = Booster Heating
8 = Purge (water pump is
constantly running to purge the
hydraulic circuit)
9 = Drying (slow water temp.
ramp-up in Heating mode for UFH
drying)
Range
Default
0 to 99
3
0 to 99
4
0 to 99
4
20,0 to
20
60,0
20,0 to
45
60,0
0 to 9
Heating mode
Cooling mode
Sensors & Safety devices
a
TS Suction temperature sensor
b
Low pressure transducer
c
HP switch
d
TD (discharge) (connected to inverter input)
e
TE (defrost temp)
f
OAT (outside ambient temperature)
g
TR
h
Entering water temperature
i
Leaving water temperature
j
Flow switch
k
IAT (indoor ambient temperature, if applicable)
IAT
Software point
P001
Value read under "parameter number"
Ex.
Unit
3
day
4
day
5
day
20
°C
28
°C
-
9
-
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