Carrier AQUASNAP JUNIOR 30RA Installation Manual - User Manual

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AQUASNAP JUNIOR

30RA / 30RH

INSTALLATION MANUAL

•

R QUALIT

I S O 900 1

30RA/30RH Puron
Water chillers, air-cooled with integrated hydronic section

GB - 1

ENGLISH

Table I

For operation and maintenance instructions of this unit as well as installation
instructions of the indoor unit, refer to the relevant manuals.

Contents

Pagina

Dimensions and weight .................................................................................................................

Technical data ................................................................................................................................

Minimum clearances ......................................................................................................................

Electrical data ................................................................................................................................

Data ...............................................................................................................................................

General information .......................................................................................................................

Warnings: avoid .............................................................................................................................

Water connections .........................................................................................................................

Connections and water circuits .....................................................................................................

8/9

Electrical connections ....................................................................................................................

10/12

Water-refrigerant heat exchanger .................................................................................................

12/13

Check the refrigerant charge .........................................................................................................

Unit maintenance ...........................................................................................................................

Control and safety devices ............................................................................................................

Diagnostics ....................................................................................................................................

Troubleshooting and guide for the owner ......................................................................................

Accessories ...................................................................................................................................

ATTENTION INSTALLERS AND SERVICE TECHNICIANS!

AIR CONDITIONER WITH R-410A REFRIGERANT

• R-410A refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing

equipment and replacement components are designed to operate with R-410A.

• R-410A refrigerant cylinders are pink in colour.
• R-410A refrigerant cylinders have a dip tube which allows liquid to flow out of the cylinder in upright

position.

• The R-410A units must be charged with refrigerant in a liquid state. Use a commercial type metering

device in the manifold hose in order to vaporize the liquid refrigerant before it enters in the unit.

• R-410A, as other HFCs, is only compatible with the following oils selected by the compressor

manufacturer.

• The vacuum pump is not sufficient to remove moisture from the oil.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• Never open unit to atmosphere while it is under a vacuum.
• When unit must be opened for service, break vacuum with dry nitrogen and replace filter dryer.
• Do not vent R-410A into the atmosphere.

Cooling only models

Heat pump models

Power supply

30RA005---7

30RH005---7

230 V ~ 50 Hz

30RA007---7

30RH007---7

230 V ~ 50 Hz

30RA007---9

30RH007---9

400 V 3N~ 50 Hz

30RA009---9

30RH009---9

400 V 3N~ 50 Hz

30RA011---7

30RH011---7

230 V ~ 50 Hz

30RA011---9

30RH011---9

400 V 3N~ 50 Hz

30RA013---9

30RH013---9

400 V 3N~ 50 Hz

Unit size

Oil type

Quantity

Drier already installed on

liquid line of the unit

005 - 007

POE

1.12

YES

009 - 011

POE

1.25

YES

013

POE

1.95

YES

30RA/30RH Puron

GB - 2

Unit capacities and power input (compressor and conventional pump watts) are based on:

cooling: outdoor air temperature 35

C d.b.; 24

C w.b., / water temperature - leaving 7

C / entering 12

C Eurovent 6/C/003-1998, CEN/TC113/WG5 N 4

heating: outdoor air temperature 7

C d.b.; 6

C w.b., / entering water temperature 40

C, leaving water temperature 45

C Eurovent 6/C/003-1998

Unit

30RA

30RH

005

007

009

011

013

005

007

009

011

013

Power input

Cooling

2,07

2,70

3,05

3,22

4,57

2,02

2,57

2,95

3,28

4,56

Heating

—

2,24

2,93

3,4

3,72

5,03

Compressor type

SCROLL

Water circulating pump selectable speeds

No.

Propeller fan motor - diameter

No./mm

1/370

2/370

1/370

2/370

Speed

rpm

840

1090

1030

890

1050

1200

1050

1200

Heat exchanger

WELDED PLATES

Water content

0,66

0,85

0,94

1,22

1,50

0,66

0,85

0,94

1,22

1,50

Expansion tank capacity

Nitrogen charge pressure

kPa

350

Expansion device

0,043

0,052

0,058

0,061

0,065

0,046/0,042 0,055/0,046 0,054/0,047 0,062/0,055 0,065/0,060

Table II: Technical data

Dimensions and weight

Mod. 30RA 005-007

Mod. 30RA 009

30RH 005-007-009

Mod. 30RA 011-013

30RH 011-013

Mod.

30RA

30RH

005

007

009

011

013

005

007

009

011

013

800

590

803

1264

803

1264

300

508

146

330

157

108

118

112

123

Electrical cables inlet

GB - 3

30RA/30RH Puron

E N G L I S H

Minimum clearances

Unit

30RA

30RH

005

007

009

011

013

005

007

009

011

013

Power supply

V - ph - Hz 230-1-50 230-1-50 400-3-50 400-3-50 230-1-50 400-3-50 400-3-50 230-1-50 230-1-50 400-3-50 400-3-50 230-1-50 400-3-50 400-3-50

Maximum power input*

2,9

3,8

3,6

4,3

4,4

6,3

2,85

3,9

4,3

5,18

4,9

6,73

Locked rotor amps

LRA

Full load amps

FLA

13,5

17,5

13,5

5,5

17,5

Delayed fuses (class gL)

power supply protection

Section of the power

3 x 2,5

5 x 2,5

3 x 4,0

5 x 2,5

3 x 2,5

5 x 2,5

3 x 4,0

5 x 2,5

supply conductors

Delayed fuses (class gL)

auxiliary circuit protection

Compressor

Capacitor

F/V 40/450

50/450

60/450

40/450

50/450

60/450

Water circulating pump (230-1-50)

Current input

0,3

0,5

0,9

0,97

0,3

0,5

0,9

0,97

Capacitor

F/V

3/400

4/400

7/400

3/400

4/400

7/400

Fan motor (230-1-50)

Current input

0,5

0,94

0,9

1,8

0,5

0,94

0,9

1,8

Capacitor

F/V 2,5/450

4/450

2,5/450

4/450

3/450

4/450

3/450

Compressor crankcase

heater (230-1-50)

Current input

0,11

Note:
The main supply connecting cable must be H07 RN-F (or higher) type, synthetic rubber insulation with Neoprene coating, according to EN 60335-1 and
HD277.S1 codes.
Interlocks with the pumps or other accessories have to be inserted as shown in the notes on the wiring diagram
* Maximum unit power input with maximum load and non-compliant supply voltage.

Table III: Electrical data

Mod.

30RA 005 - 007

30RA 009 - 011 - 013

30RH 005 - 007 - 009- 011 - 013

100

250

500

100

470

670

400

GB - 4

30RA/30RH Puron

Table VIII: Operating limits

Data

Table IV: Control and safety device settings

open

closed

Refrigerant circuit high pressure switch

kPa

4206

2996

Water circuit safety valve

kPa

300

---

Freeze-up protection

2.7

Compressor first start delay

sec

Compressor start delay (OFF-ON)

sec

Compressor anti-cycling protection (OFF-ON)

cycle/h

When the compressor start delay has elapsed, the unit automatically restarts, if the

leaving water temperature is above 2.7

Unit
30 RA/RH

Mod.

005

007

009

011

013

Water flow

l/s Nominal

0.25

0.31

0.37

0.46

0.54

System water content

Min.

30RH Max.

30RA Max.

100

Maximum operating pressure

kPa

300

Charge pressure
before operation

kPa

120

Maximum height difference
allowed with water at 50

Note:
Minimum head pressure
The minimum inlet head pressure at maximum water flow and a water
temperature of 50

C should be 13 kPa (about 1.3 mWG).

This precaution prevents cavitation noise and damage to the bearings
due to low water flow and insufficient bearing lubrication.

Table V: Water flow / System water content

Diameter

outside

inside

litres / metre

inches

3/8 Gas

12.7

0.13

1/2 Gas

16.3

0.21

3/4 Gas

21.7

0.37

1 Gas

27.4

0.59

Table VII: Water content steel piping

Diameter-mm

outside

inside

litres / metre

0.11

0.15

0.20

0.31

0.49

0.80

Table VI: Water content copper piping

Min

Max

Power supply :

230 - 1 - 50

198

264

400 - 3 - 50

342

462

* ATTENTION:
For outside temperatures below 0

C, mix the correct amount of antifreeze

with the water.

Operating range - cooling

Leaving water temperature

Outdoor air temperature

Operating range - heating

Leaving water temperature

Outdoor air temperature

Minimum water temperature at start-up 3

-15 -10 -5 0 5 10 15 20 25 30 35 40 45 50

-15 -10 -7 -5 0 2 5 10 15 20 25

Maximum water temperature at start-up 35

Important note:
Use of the buffes tank is not obligatory.
It may be necessary to use it to reach the minimum volumes shown
in table V.
Refer to the following example for the buffes tank:

GB - 5

30RA/30RH Puron

E N G L I S H

Choosing the installation site

Positions to avoid:
• Exposed to direct sun.
• Too close to sources of heat radiation, vapour or flammable gas.
• Particularly dusty areas.

Recommendations:
• Choose a position protected from opposing winds.
• Choose a position sheltered from direct sun.
• Choose an area where air outlet and unit noise will not bother

your neighbours. We advise inserting anti-vibration supports.

• Choose a position that allows for the clearances required.
• Floor structure should be adequately strong to support unit weight

and minimize vibration transmission.

• Consider a position which will not obstruct passageways or doors.

Fix the unit with locally purchased bolts countersunk in the base to
prevent overturning in case of strong winds.

• For heat pump models, unit must be adequately raised above

the ground surface.

• To empty the condensate water to a drain while operating in

heating mode, use the drain connection underneath on the left of
the pan and use a vinyl pipe with a 16 mm internal diameter.
This must not be used at temperatures lower than 0

• If the unit is installed in areas where heavy snowfalls may occur, it

is necessary to raise its level at least 200 mm above the usual
snow level or alternatively to use the outdoor unit bracket kit.

General information

Unit installation

R-410A unit operate at higher pressures than standard
R-22 units. Do not use R-22 service equipment or components
of units for R-410A equipment.

Read this instruction manual thoroughly before starting the
installation.

• This unit complies with low-voltage (EEC/73/23) and electro-

magnetic compatibility (EEC/89/336) directives.

• The installation must be carried out by a qualified installer.

• Follow all current national safety code requirements. In particular

ensure that a properly sized and connected ground wire is in
place.

• Check that voltage and frequency of the main power supply are

those required; the available power must be adequate to operate
any other possible appliances connected to the same line.
Also ensure that national safety code requirements have been
followed for the main supply circuit.

• After installation thoroughly test the system operation and explain

all chiller functions to the owner.

• Leave this manual with the owner for consultation during future

periodic maintenance.

• The chiller and its components must be periodically inspected to

check for loose, damaged or broken parts.
If these faults are found and not eliminated, the unit could cause
physical injury and damage to goods and property.

IMPORTANT:
During the unit installation first make the water connections
and then electrical connections. If unit is removed first
disconnect electrical cables, then water connections.

WARNING:
Disconnect the main power supply switch before servicing the
system or handling any internal parts of the unit.

• The manufacturer declines any liability for damage resulting from

modifications or errors in the electrical or water connections.

• Failure to observe the installation instructions or use of the unit

under conditions other than those indicated in Table VIII “Operating
limits”, will immediately void the unit warranty.

• Failure to observe electric safety codes may cause a fire hazard in

case of short circuits.

• Inspect equipment for damage due to improper transportation or

handling: file an immediate claim with the shipping company.
Do not install or use damaged units.

• In case of any malfunctioning turn the unit off, disconnect the

mains power supply and contact a qualified service engineer.

• This unit contains R-410A refrigerant, a substance that does not

deplet the ozone layer.

• All manufacturing and packaging materials used for your new

chiller are compatible with the environment and can be
recycled.

• Dispose of the packaging material in accordance with local

requirements.

• This unit contains refrigerant that must be disposed of in a proper

manner. When disposing of the unit after its operational life,
remove it carefully. The unit must then be delivered to an
appropriate disposal center or to the original equipment dealer.

• When lifting the unit, never use hooks inserted into the side

handles, always use special equipment (e.g. lifting devices,
trolleys, etc.).

• Carefully recover refrigerant within this unit before final disposal or

when servicing. Never vent refrigerant to atmosphere.
Use approved recovery equipment for R-410A refrigerant.
Do not use equipment for R-22 refrigerant.

508 mm

330 mm

��

4 Ø 8 mm pins.

��

Protrusion height from the support
surface max. 20 mm.

��

햲

햳

햴

햲

100 mm min.

햳

20 mm gradient.

햴

Gravel-filled trench

햵

햶

햵

Drain connection

햶

Vinyl pipe

Snow

30RA/30RH Puron

GB - 6

Predominant head winds.

Multiple unit installation with units facing each other.

Insulating the connecting pipes only partially, which will cause
dripping.

Dripping into passageways.

Any obstruction of the unit air outlet and intake or any obstacle
that is too close (see minimum clearances required).

Installation on grassy ground or soft surfaces (in these cases a
solid foundation must be included).

Excessive height difference or excessive distance between chiller
and fan coil units.

Unnecessary turns and bends in the connecting pipes.

Any slack in the electrical connections.

Warnings: avoid....

GB - 7

30RA/30RH Puron

E N G L I S H

Water connections

max 20 m

The automatic air vent must be located at the highest
point of the circuit.

Unit water inlet Ø 1” F Gas

Unit water outlet Ø 1” F Gas

Drain

Air purge

Drain safety valve Ø 1/2” F Gas

Difference in height between water chiller and highest system point

Water connections

Water circuit: recommended wiring

Brazed plate heat
exchanger

Closed expansion
tank

Circulating pump

Flow switch

Temperature sensor

Safety valve

30RA/RH unit

10.

Leaving water

11.

Return water

12.

Filter 10 mesh/cm

14.

Water drain connection
(chiller)

Field supplied piping

Manual air vent

Automatic air
vent

Water drain /
circuit drain

Shut-off valve

Pressure gauge

30RA/30RH Puron

GB - 8

Connections and water circuits

0,25

0,28

0,31

0,33

0,36

0,39

0,42

0,44

RA/RH 009

●

▲

■

RA/RH 011

●

▲

■

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

0,17

0,19

0,22

0,25

0,28

0,31

0,33

RA 007

●

▲

■

vailable static pressure

(kPa)

Water flow rate l/s

vailable static pressure

(kPa)

Water flow rate l/s

RA/RH 013

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

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

–9

–15

–23

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

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

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

●

medium speed

▲

low speed

Water temperature 20

0,17

0,19

0,22

0,25

0,28

0,31

0,33

RH 007

●

▲

■

vailable static pressure

(kPa)

Water flow rate l/s

vailable static pressure

(kPa)

vailable static pressure

(kPa)

vailable static pressure

(kPa)

GB - 9

30RA/30RH Puron

E N G L I S H

Remove electric box cover.
Connect the wires to the terminals according to the wiring diagram
and firmly tighten.

• The characteristics of the available power supply must

correspond to the unit nameplate specifications.

• The voltage must be within the limits indicated in the technical

data table.

• The imbalance between voltage phases must always be less

than 2%.

• WARNING:

If the unit operates at a voltage outside the limits given in Table
VIII or with a phase imbalance above 2%, this constitutes
improper use and may affect the warranty.
If the phase imbalance is higher than 2%, contact the local
electricity board immediately.

• Electric wiring must be in accordance with data indicated in this

manual and the wiring diagram and conform to applicable local
and national regulations.

• Ensure that mains supply connection is made through a switch

that disconnects all poles, with contact gap of a least 3 mm.

• The mains supply connecting cable must be H07 RN-F (or

higher) type, synthetic rubber insulation with Neoprene coating,
according to EN 60335-1 and HD277.S1 codes.

IMPORTANT:
• Make earth connection prior to any other electrical

connections.

• Earthing is required by law.

The installer must earth the unit using the terminal marked
with the international earthing symbol.

• Before connecting the supply cable to the line, locate line

(L), lines (L1-L2-L3) and neutral N. Then make connections,
as indicated in the wiring diagram.
WARNING:
The supply line of three-phase units must be three-phase plus
neutral. Omission of the neutral N line could damage the single-
phase supplies.

• The wiring diagram for the electrical supply to remote controls/

interlocks is inside the unit, glued under the cover.

• See Table III for cables sizes and dimensions of the electrical

devices.

Power circuit supply

• The power circuit supply (three-phase plus neutral) must be

connected to the correct terminals (see wiring diagram).

• The auxiliary circuit supply is directly taken from one phase and

neutral and it is proteced by fuse "F".

• If the electrical supply cables L1 (R), L2 (S), L3 (T) are

connected in an incorrect sequence, the power supply is
interrupted after a few seconds by the control, which goes into
alarm status preventing the incorrect compressor rotation.

Note:
After connections have been completed, replace electric box
cover.

Electrical connections

Connections and water circuits

The control can pilot an external pump with a current input of up
to 8 Ampere.
It is recommended to disconnect the internal pump, replacing it
with a tube.

WARNING:
The minimum inlet pressure to the pump at maximum water flow
should be 13 kPa at the maximum supply water temperature
(50

C).

This precaution avoids cavitation noise and damage to the pump
bearings due to lack of water flow and poor lubrication of the
bearings.

Flow switch
The flow switch in the outlet line to the pump stops the
compressor operation in case of:

• pump failure;

• water circulation cut-off;

• presence of air un the system.

햲

Position for units size
005 - 007 - 009

햲

햳

Position for units size
011 - 013

30RA/30RH Puron

GB - 10

Electrical connections - single-phase models

Terminal block legend, single-phase models

Earth.

Live power supply.

Neutral power supply.

ON/OFF switch

HEAT/COOL switch

Dual SET-POINT switch (standard/economy)

NOTE:
The contact rating must be greater than > 20 mA @ 24 V ac.

Unit without accessory AQUASNAP JUNIOR remote control

Unit with accessory AQUASNAP JUNIOR remote control

30RA

30RH

30RA

30RH

��

A
B

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

��

Power supply 230 V 1ph 50 Hz

쐂

AQUASNAP JUNIOR remote control

Main switch
Time-delay fuse or circuit breaker (see table III "Electrical data").

A
B

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

��

Power supply 230 V 1ph 50 Hz

쐂

AQUASNAP JUNIOR remote control

Main switch
Time-delay fuse or circuit breaker (see table III "Electrical data").

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

��

Power supply 230 V 1ph 50 Hz

��

Available for remote alarm
(3 A @ 24 V ac max.)

Main switch
Time-delay fuse or circuit breaker
(see table III "Electrical data").

A
B

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

��

Power supply 230 V 1ph 50 Hz

��

Available for remote alarm
(3 A @ 24 V ac max.)

Main switch
Time-delay fuse or circuit breaker
(see table III "Electrical data").

Terminal block legend

Earth.

Live power supply.

Neutral power supply

햲

Control board

L N

FUSE

24V

FUSE

햲

��

GB - 11

30RA/30RH Puron

E N G L I S H

L1 L2 L3

��

L1 L2 L3

��

L1 L2 L3 N

FUSE

L1 L2 L3

24V

FUSE

30RA

30RH

Electrical connections - three-phase models

Terminal block legend, three-phase models

Earth.

Live power supply.

Neutral power supply.

ON/OFF switch

HEAT/COOL switch

Dual SET-POINT switch (standard/economy)

NOTE:
The contact rating must be greater than > 20 mA @ 24 V ac.

Unit without accessory AQUASNAP JUNIOR remote control

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

쐆

Power supply 400 V 3N~ 50 Hz

��

Available for remote alarm (3 A @ 24 V ac max.)

Main switch
Time-delay fuse or circuit breaker
(see table III "Electrical data").

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

쐆

Power supply 400 V 3N~ 50 Hz

��

Available for remote alarm (3 A @ 24 V ac max.)

Main switch
Time-delay fuse or circuit breaker
(see table III "Electrical data").

30RA/30RH Puron

GB - 12

L1 L2 L3

��

L1 L2 L3

��

30RA

30RH

Electrical connections - three-phase models

Unit with accessory AQUASNAP JUNIOR remote control

Terminal box legend, three-phase models

Earth.

Live power supply.

Neutral power supply.

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

쐆

Power supply 400 V 3N~ 50 Hz

쐂

AQUASNAP JUNIOR remote control

Main switch
Time-delay fuse or circuit breaker
(see table III "Electrical data").

��

Unit electrical panel

��

Terminal blocks

��

Electronic board connectors

쐆

Power supply 400 V 3N~ 50 Hz

쐂

AQUASNAP JUNIOR remote control

Main switch
Time-delay fuse or circuit breaker
(see table III "Electrical data").

Water - refrigerant heat exchanger

Evaporator

Condenser

Water inlet

Chilled water outlet

Water inlet

Hot water outlet

Gas

Refrigerant

• The unit includes a brazed plate water-refrigerant heat

exchanger.
In the 30RA model the heat exchanger operates as a refrigerant
expansion evaporator whereas in 30RH units it operates as an
evaporator in the summer cycle and as a water-cooled
refrigerant condenser in winter cycle.

• Check if characteristics of the water in the refrigerant circuit are

correct. If necessary, treat water as appropriate.

CAUTION: In winter water frost may damage the unit.

To avoid freeze-up of the water contained in the system, one of the
following precautions must be taken during the winter cycle:

• drain the water from the system, using the drains in the lower part

of the unit,

• add the correct percentage of glycol to the water circuit.

Liquid + Gas

Liquid

GB - 13

30RA/30RH Puron

E N G L I S H

Water-refrigerant heat exchanger

Flow diagram for cooling only units

1. High pressure transducer
2. High pressure switch
3. Low pressure transducer
4. Pressure service port
5. Accurater expansion device
6. Crankcase heater
7. Suction accumulator
8. Water inlet
9. Chilled water outlet

10. Hot water outlet
11. Reversing valve

Refrigerant R-410A

Gas

Liquid + Gas

Liquid

Flow diagram for heat pump units: cooling cycle

Flow diagram for heat pump units: heating cycle

GB - 14

30RA/30RH Puron

Check the refrigerant charge

• This check becomes necessary after any refrigerant leak or

after the refrigeration circuit has been switched off to replace a
component.

• The best method to correctly charge refrigerant is to completely

empty the refrigerant circuit using refrigerant recovery
equipment.
Then charge the exact quantity of refrigerant according to the
data shown on the unit nameplate. This can be done with
charging equipment of the “Dial-a-charge” type.

• To empty the refrigerant circuit, the refrigerant recovery

equipment has to be connected to the high pressure side and
low pressure side service ports simultaneously (1/2” UNF,
20 threads/inch).

• R-410A refrigerant cylinders contain a dip tube which allows

liquid refrigerant to flow from the cylinder in an upright position.
Charge R-410A units with cylinder in upright position and a
commercial-type metering device in the manifold hose in
order to vaporize the liquid refrigerant before it enters the
unit. Charge refrigerant into the suction line.

• The above method must be used for heat pump systems

operating in heating, as operating difficulty in the winter season
(iced outdoor coil) impedes stable operating conditions.
Hence the refrigerant charge must be checked.
In cooling only systems, or heat pumps operating in the cooling
mode, the refrigerant charge check can be carried out using the
superheating method; this is only possible, if the ambient
temperature is above 15

Unit maintenance

1. Compressor winding protection
Automatic reset.
This is activated when the temperature of the winding or the the
compressor power input exceed the set limits.

2. Freeze-up protection
This protection device is controlled by the Pro-Dialog Junior
control using the water heat exchanger leaving temperature.
This safety device interrupts unit operation and shows an alarm
code on the display.

3. Cooling control setpoint
This parameter is regulated by the control and factory set to an
entering water temperature of 12

The second set point default value is 14

C and it can be selected

via the Service Interface.

4. Heating control setpoint
This parameter is regulated by the control and factory set to an
entering water temperature of 40

5. High pressure switch HIP
Installed on the supply piping, set to 42 bar, with manual
electric reset.

The following maintenance operations must be carried out by
qualified personnel.

Cleaning the coil
When necessary, proceed as follows for more careful cleaning of
the coil:

Switch the mains supply OFF.

Remove unit top cover by losening holding screws and lifting
the cover.

Carefully clean the coil with a vacuum cleaner.
Also clean the inside of the fan compartment with a vacuum
cleaner.
Replace the unit cover and tighten the screws.

After long shutdown periods and at commissioning:

Energize the system by putting the main switch to ON without
starting the unit.
(The control must be in the OFF position for at least 12 hours
before the initial start up).
Do not disconnect the main switch during the unit operating
season.

Control and safety devices

6. Low suction temperature protection
Automatic/manual reset (after 6 automatic cycles) based on the
pressure transducer signal installed on the compressor suction
lines.

7. High pressure protection
Automatic/manual reset (after 6 automatic cycles) based on the
pressure transducer signal installed on the compressor discharge
lines.

8. Water flow switch FS
Installed on the water outlet to the heat-exchanger, does not
permit compressor and pump operation if there is no water
flow.

9. Defrost cycle
This operates only if ice is present on the heat exchanger during
heat pump operation.
This function can be operated by the control.

10. Solid state head pressure controller
Changes the fan speed according to the condensing temperature.
Is controlled by the Pro-Dialog Junior control and permits unit
operation up to the specified temperature limits, optimising the
condensing temperature.

GB - 15

30RA/30RH Puron

E N G L I S H

1 + 1 + 1=3

Diagnostics

The electronic control on the machine continuously monitors its
operation. In the event of a malfunction, it activates a relay whose
contact generates a coded alarm signal sending ON/OFF signals
to the remote control and switching on the alarm LED

Some alarm conditions are automatically reset, others require the
intervention of the operator to search for the fault, remove its cause
and switch the unit back on.

Manual resetting of alarm conditions

Manual resetting of alarm conditions is performed using the
remote ON/OFF button by simply switching OFF and then ON again
or opening and closing S1 switch (see electrical connections page 11).

WARNING: manual resetting causes the definitive loss of the alarm
code; therefore, before a manual reset, check the code according to
the instruction reported and remove its cause.

N.B. Temporary power supply failure to a unit in an alarm condition
does not reset the unit.

Alarm codification

The alarm code generated by a failure, is shown to the operator one
time only, and the unit remains in alarm status. To have the alarm
code shown again, press the ECO button on the remote control.

The alarm codification is based on the binary two-digit code X1 and
X2, as follows:
the first figure X1 flashes at 1 second intervals until it reaches the number
corresponding to the first digit, after a pause of 2 seconds, second figure
X2 starts to flash, again with 1 second intervals until the number
corresponding to the second is reached (only for two-digit codes).

Alarm code 31 with persistent alarm condition

LED on for 1 second

LED off for 1 second

To have the alarm code shown again, press the ECO button on the
remote control.
By pressing the ON/OFF button, the unit is turned OFF and the
alarm code is shown again. To restart the unit, remove the alarm
cause and press the ON/OFF button again.

Alarm

Description

Control

Alarm reset

Probable cause

code

action

method

Compressor fault

Compressor stopped Manual

Compressor overheated

Leaving water temperature

Unit stopped

Automatic

Sensor out of range, probe wire interruption

probe fault

or sensor fault

Entering water temperature

Unit stopped

Automatic

Sensor out of range, probe wire interruption

probe fault

or sensor fault

Defrost probe fault

Unit stopped

Automatic

Sensor out of range, probe wire interruption
or sensor fault

Air temperature probe fault

Unit stopped

Automatic

Sensor out of range, probe wire interruption
or sensor fault

High pressure transducer fault

Unit stopped

Automatic

Transducer out of range, incorrect transducer voltage
transducer wire interrupted or transducer fault

Low pressure transducer fault

Unit stopped

Automatic

Transducer out of range, incorrect transducer voltage
transducer wire interrupted or transducer fault

Automatic if the

Additional CCN

Unit stopped

board is

Board defect

clock/board fault

recognised again

Low refrigerant pressure

Unit stopped

Automatic/

Lack of refrigerant in the circuit, blocked

in the circuit

Manual

refrigerant filter or low pressure transducer fault

High refrigerant pressure

Unit stopped

Manual

Fan fault, coil obstructed, high outdoor

in the circuit

air temperature

High pressure safety switch /

The safety pressure switch has not been reset after

reverse compressor rotation

Unit stopped

Manual

the last alarm, incorrect compressor connection

Plate exchanger

Unit stopped

Automatic/

Low water flow rate entering or leaving

anti-freeze protection

Manual

water probe fault

Repeated attainment of low

Low pressure transducer fault,

suction temperature in cooling

Unit stopped

Automatic

refrigerant filter blocked

(more than six times)

or lack of refrigerant in the circuit

Repeated attainment of high

High pressure transducer fault

pressure condition in cooling

Unit stopped

Automatic

high air temperature,

(more than six times)

high entering water temperature

Repeated attainment of high

Unit stopped

Automatic

Low water flow rate entering or leaving

discharge temperature in heating

water probe fault

Repeated attainment of low

Unit stopped

Automatic

Low pressure transducer fault, refrigerant filter

suction temperature in heating

blocked or lack of refrigerant in the circuit

Low entering water

Unit stopped

Automatic

Entering water temperature too low,

temperature in heating

entering or leaving water probe fault

Outdoor interblock fault

Unit stopped

Manual

Flowswitch tripped or fault, air in the water circuit

CCN emergency shut-down

Unit stopped

Automatic

Network control

Loss of communication with the The unit operates

Automatic

CCN bus wiring defect or

Flotronic or Chiller System Manager

in local mode

fault in the system

Maintenance service request

Unit stopped

Manual

–

The following list describes the possible cause for each alarm code:

GB - 16

30RA/30RH Puron

Troubleshooting, guide for the owner and accessories

Troubleshooting

Unit compressor and fan will not start:
• Unit not energized; check the mains power connections.
• Mains switch OFF; check and put in the ON position.
• Main switch fuses have blown; replace.
• Wait for 2 minutes; compressor cycling protection is on.
• Pressure switch open; check and eliminate cause.
• Mains voltage too low.
• Electrical connections loose or wrong; check and repair.

Compressor will not start, but unit fan is running:
• Electrical connections of compressor loose or wrong; check andrepair.
• Compressor burnt out, seized or protection device open; check for

the cause and replace compressor if necessary.

• Run capacitor faulty (single-phase models); replace.

Compressor starts, but stops due to its overtemperature
protection (other than stops caused by the normal operation
of the thermostat):
• Wrong refrigerant charge (excessive or low) or air or other non-

condensable gases in the circuit; drain refrigerant (see note 1),
evacuate and recharge.

• Mains voltage wrong (too high or too low).
• Condenser coil obstructed; remove obstructions.
• Fan off; check cause and repair.
• Run capacitor faulty; check and replace.
• Indoor unit thermostat faulty; replace.
• Refrigerant circuit clogged; check and remove obstructions.
• Reversing valve faulty in heat pump models; replace.
• Expansion device clogged or covered with ice; drain refrigerant

(see note 1), evacuate and recharge.

Compressor runs continuously:
• Unit selected too small for actual air conditioning needs.
• Water temperature selection too low (if in cooling) or too high (if in

heating, for heat pump models); check temperature selection.

• Refrigerant charge low; check and add refrigerant.
• Outdoor unit fan faulty; replace.
• Air or other non-condensable gases in the circuit; drain refrigerant

(see note 1), evacuate and recharge.

• Obstruction in the air intake or dirty indoor unit filters; remove

obstruction or clean filter.

Frequent ice build-up on coil (during heating with heat
pump units):
• Fan stopped; check cause and repair.
• Wrong electrical connections on defrost circuit; check electrical

connections and repair.

Discharge pressure too high:
• Coil dirty or obstructed; clean or remove obstructions.
• Water flow rate is insufficient or the pump is faulty (during

heating); replace.

• Refrigerant charge too high; drain some refrigerant (see note 1).
• Air or other non-condensable gases in the circuit; drain refrigerant

(see note 1), evacuate and recharge.

Discharge pressure too low:
• Refrigerant charge too low; add refrigerant.
• Coil dirty or obstructed; clean or remove obstructions.
• Water filter dirty; clean filter.

Suction pressure too high:
• Internal high pressure relief valve open; check for cause and repair.
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Reversing valve (on heat pump models) faulty or internal leak;

replace.

Suction pressure too low:
• Refrigerant charge too low; add refrigerant.
• Evaporator coil (indoor or outdoor in case of heat pump models)

covered with ice; see the following points.

• Air circulation on the evaporator unit not sufficient; check for the

cause and repair.

• Expansion device or suction line clogged: check and repair.
• Fan does not stop during defrost periods (when heating with heat

pump models); check electrical connections.

• Defective defrost probe (heating with heat pump models); replace.
• Contact between tube and defrost probe (heating with heat pump

models) faulty; check and repair.

Fan cycling due to its overtemperature protection:
• Fan capacitor faulty; replace.
• Electrical connections loose; check connections.
• Fan bearing seized; check and repair.
• Expansion device clogged or covered with ice; drain refrigerant

(see note 1), evacuate and recharge.

Note 1:
Do not release refrigerant to the atmosphere; use
refrigerant recovery equipment.

Guide for the owner

When installation and tests are completed explain the Operation
and Maintenance Manual to the owner, with particular attention to
the main operating modes of the air conditioner, such as:

• Turning the unit on and off.

• Control functions.

In the event of a fault or malfunctioning, check the error code
shown on the remote control or at the LED on the board in the
chiller control panel.

NOTE

(1)

: Exclusively for service use

Table IX: Accessories

Description

Part number

Mod. 30 RA/RH

005

007

009

011

013

AQUASNAP JUNIOR remote controller

30RAJ9002

앬

Aquasmart control

CEAS430408-01SA

앬

Service interface

(1)

30RAJ9003

앬

Mechanical water filter

30RAJ9004

앬

CCN clock board

X30RA20J010

앬

L010126H39 - 0404

Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1

The manufacturer reserves the right to change any product specifications without notice.

April, 2004. Printed in Italy