30RA/30RH Puron
GB - 8
Connections and water circuits
70
60
50
40
30
20
10
0
0,25
0,28
0,31
0,33
0,36
0,39
0,42
0,44
RA/RH 009
●
▲
■
RA/RH 011
80
70
60
50
40
30
20
10
0
●
▲
■
0,20
0,25
0,30
0,35
0,40
0,45
0,50
0,55
0,60
0,65
Available static pressure
Water flow rate l/s
60
50
40
30
20
10
0
0,17
0,19
0,22
0,25
0,28
0,31
0,33
RA 007
●
▲
■
A
vailable static pressure
(kPa)
Water flow rate l/s
A
vailable static pressure
(kPa)
Water flow rate l/s
Water flow rate l/s
RA/RH 013
80
70
60
50
40
30
20
10
0
0,20
0,25
0,30
0,35
0,40
0,45
0,50
0,55
0,60
0,65
●
▲
■
Water flow rate l/s
60
50
40
30
20
10
0
0,17
0,19
0,22
0,25
0,28
0,31
0,33
RA/RH 005
●
▲
■
Correction factors for ethylene glycol
Ethylene glycol
10%
20%
30%
40%
Freezing
temperature
–4
°
C
–9
°
C
–15
°
C
–23
°
C
Capacity
0.996
0.991
0.983
0.974
Power input
0.990
0.978
0.964
1.008
Water flow rate
1.000
0.979
0.979
1.025
Pressure drop
1.003
1.010
1.020
1.033
Connections and water circuits
• The hydraulic circuit must be designed to ensure a steady water
flow through the evaporator at any time.
• The water pipes in the circuit must be well supported and firmly
fastened to ensure that they do not put a strain on the
connections to the unit.
• Water inlet and outlet are identified by a tag.
• Air purge and water drain are located at the inlet and outlet
connections and are closed by appropriate plugs.
• Pipes must have shut-off valves to permit emptying of the heat
exchanger without draining the whole system, as suggested in
the diagram.
Control of a boiler
With a PRO-Dialog configuration, the unit (if it is in heating mode)
can control the start-up of a boiler via the mother board output
signal (see Service Interface Manual).
If the boiler is operating, the unit water pump is stopped.
The boiler output is activated:
– in 30RA units, by selecting heating mode
– in 30RH units, by selecting heating mode with the unit in fault
condition or with the unit operating at very low outdoor
temperature (see Service Interface Manual).
Water circulating pump
A single-phase, three-speed water circulating pump, to be
selected at installation, is installed inside the unit.
The water circulating pump, can be fitted with a water system
resistor (pressure drop) as indicated in the diagrams, keeping
water flow at the correct values.
If the system pressure drop is higher then the pump available
head, water flow to the unit and unit performances are reduced.
To reduce to minimum system pressure drop it is necessary:
- to reduce number of bends;
- to avoid elbow bends;
- to reduce the system extension to a minimum;
- to use pipes of the correct diameter.
To avoid possible damage due to water freezing, it is
recommended to install the water refill system inside the building.
It is recommend:
• to fit a replaceable filter of at least 10 mesh/cm
2
in the water
inlet, especially with welded joint iron pipes.
Water changes or additions should be reduced, if possible, as
they contribute to oxidation and to calcium deposit formation.
If the unit is not used for a long period, rotor shaft seizure can
occur; the user should unblock the rotor:
• switch off the system;
• remove the rubber plug from the panel (NOT available in the
versions 30RA005 / 30RA005H / 30RA007 / 30RA007H /
30RA007-9 / 30RA007H9);
• unscrew the air purge cap on the pump;
• insert a screwdriver in the slot and turn the rotor shaft;
• reassemble the air purge cap;
• put the rubber plug back on the panel;
• switch on the system.
Legend:
■
III high speed
●
II
medium speed
▲
I
low speed
Water temperature 20
°
C
60
50
40
30
20
10
0
0,17
0,19
0,22
0,25
0,28
0,31
0,33
RH 007
●
▲
■
A
vailable static pressure
(kPa)
Water flow rate l/s
A
vailable static pressure
(kPa)
A
vailable static pressure
(kPa)
A
vailable static pressure
(kPa)
