AQUASNAP 30RB / 30RQ 30RBY / 30RQY Installation, operation and maintenance instructions

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AQUASNAP
30RB / 30RQ
30RBY / 30RQY
Installation, operation and maintenance instructions
30RB/30RQ
30RBY/30RQY
ENGLISH
(Original instructions)
Air-cooled liquid chillers and reversible cycle air-water heat
pump with integrated hydronic module
30RB/30RQ - 30RBY/30RQY
For the use of the control system, refer to the Pro-Dialog + control manual.
Contents
Physical data ........................................................................................................................................................................
Electrical data ......................................................................................................................................................................
Dimensions and location of hydraulic connections .................................................................................................
User interface and main switch ......................................................................................................................................
Clearance for horizontal outlet unit ..............................................................................................................................
Clearance for vertical outlet unit....................................................................................................................................
General information and hydronic module ...............................................................................................................
Water connections .............................................................................................................................................................
Electrical connections .......................................................................................................................................................
Refrigerant charge .............................................................................................................................................................
Electronic control ...............................................................................................................................................................
Start-up .................................................................................................................................................................................
Compressor replacement.................................................................................................................................................
Pump replacement ............................................................................................................................................................
Unit protection devices ....................................................................................................................................................
Operating limits and operating range..........................................................................................................................
General maintenance ........................................................................................................................................................
Maintenance .......................................................................................................................................................................
Final recommendations....................................................................................................................................................
Troubleshooting .................................................................................................................................................................
Page
2-5
2-5
6-8
9
9
9
10-12
12-15
16
17
17
18
18
19
19-20
20
21
21
22
23
ENGLISH
Air-cooled liquid chillers and reversible air-to-water heat pumps with
integrated hydronic module
Start-up check list
Start up date _________________________
Equipment sold by: _________________________________________________ Contract No: _________________________________
Installed by: _______________________________________________________ Contract No: _________________________________
Site address____________________________________________________________________________________________________
Equipment type and serial No:
30RB ___________________________________________________________________
30RQ ___________________________________________________________________
ELECTRICAL DATA:
Supply voltage
Ph 1: _______________V
Ph 2: _______________V
Ph 3: ________________V
Nominal voltage: _________________________________________ V
% network voltage____________________________
Current draw
Ph 1: _______________A
Ph 2: _______________A
Ph 3: _________________A
Control circuit voltage: _____________________________________ V
Control circuit fuse__________________________A
Main circuit breaker rating ________________________________________________________________________________________
PHYSICAL DATA
Coil:
Entering air temp.: ____________________________°C
Leaving air temp.: ____________________________°C
Plate heat exchanger:
Entering water temp.: _____________________ °C
Leaving water temp.: ______________________ °C
Loss of head (water): ______________________ kPa
SAFETY DEVICE SETTING:
High pressure switch: cut-out: __________________kPa
cut-in: ________________________ kPa
Oil level _______________________________________________________________________________________________________
OPTIONS:
Commissioning engineer _________________________________________________________________________________________
Customer agreement
Name:______________________________________
Date: ___________________________________
Note: Complete this start-up list at the time of installation.
GB- 1
30RB
Physical data and electrical data - Model RB
Table I: Physical data - Model RB
30RB
017
021
026
033
040
189
173
208
193
255
237
280
262
291
273
Refrigerant charge R-410AKg
5.5
6.4
5.8
8.6
8.8
Compressor
One scroll compressor
Operating weight
with hydronic module
without hydronic module
Evaporator
Net water volume
Water connections (MPT gas)
Maximum water pressure
(unit without hydronic module)
Maximum water pressure
(unit with hydronic module)
Hydronic module
l
inches
kPa
One plate heat exchanger
1.52
1.9
1
1
1000
1000
1.71
1-1/4
1000
2.28
1-1/4
1000
3.8
1-1/4
1000
kPa
400
400
400
400
Pump
Water inlet connection (MPT gas)
inches
Pump, mesh filter, expansion tank, flow switch, pressure gauges, automatic air purge valve and drain plug
and safety valve.
One single-speed pump
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
Water outlet connection (MPT gas)
Closed expansion tank water volume
Pre-charge of expansion vessel
inches
l
bar
1
5
1.5
inches
l/s
g/min
1/2
1/2
One, copper tubes and aluminium fins
Two,axial type with two speeds
495
495
3
3
2212
2212
870
870
dB(A)
72
Water fill system (option)
Inlet/outlet diameter (MPT gas)
Condenser
Fan
Diameter
No. of blades
Air flow (high speed)
Fan speed (high speed)
Sound levels
Sound power level 10-12 W*
*
Kg
Kg
mm
400
1
5
1.5
74
1-1/4
8
1.5
1-1/4
8
1.5
1-1/4
8
1.5
1/2
1/2
1/2
Two-speed axial type
710
7
3530
900
710
7
3530
900
710
7
3530
900
78
78
80
Declared dualnumber noise emission values in accordance with ISO 4871 (with an associated uncertainty of +3dB). The values have been rounded and are for information only and not contractually binding.
Table II: Electrical data - Model RB
30RB
017
021
026
033
040
Power
V-ph-Hz
400-3-50
400-3-50
Voltage range
V
340-460
360-440
Starting current*
A
75
95
118
118
176
Maximum power drawn (Vn) **
kW
7.8
9.1
11.0
13.8
17.5
Rated current***
A
8
12
16
17
25
Maximum current (Vn) ****
A
13
16
20
24
30
Maximum current (Vn +/-15 or 10%) †
A
15
18
23
27
36
* Max. starting current within the operation limits (corresponding to the current of locked rotor in the compressor)
** Input power when the unit is at its operation limits (evaporation temperature = 10°C, condensation temperature = 65°C) and at the rated voltage (400 V)
*** The currents shown refer to Eurovent conditions (evaporator water inlet and outlet temperature = 12/7°C with air to the condenser at 35°C)
**** Max. operating current related to the max. input power and rated voltage (400 V)
† Max. operating current related to the max. input power and within the range 340-460 V for units size 17 to 33 kW, and 360-440 V for units size 40 kW.
GB - 2
30RQ
Physical data and electrical data - Model RQ
E N G L I S H
Table I: Physical data - Model RQ
30RQ
Operating weight
with hydronic module
without hydronic module
Kg
Kg
Refrigerant charge R-410A
Kg
Compressor
Evaporator
Net water volume
Water connections (MPT gas)
Maximum water pressure
(unit without hydronic module)
Maximum water pressure
(unit with hydronic module)
Hydronic module
Pump
Water inlet connection (MPT gas)
Water outlet connection (MPT gas)
Closed expansion tank water volume
Pre-charge of expansion vessel
017
021
026
033
040
206
191
223
208
280
262
295
277
305
287
6.4
7.7
7.6
9.5
9.8
One scroll compressor
l
inches
kPa
One plate heat exchanger
1.52
1.9
1
1
1000
1000
2.28
1-1/4
1000
2.85
1-1/4
1000
3.8
1-1/4
1000
kPa
400
400
400
400
inches
inches
l
bar
Pump, mesh filter, expansion tank, flow switch, pressure gauges, automatic air purge valve and drain plug
and safety valve.
One single-speed pump
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1
1
1-1/4
1-1/4
1-1/4
5
5
8
8
8
1.5
1.5
1.5
1.5
1.5
400
Water fill system (option)
Inlet/outlet diameter (MPT gas)
Condenser
Fan
Diameter
No. of blades
Air flow (high speed)
Fan speed (high speed)
inches
mm
l/s
g/min
1/2
1/2
One, copper tubes and aluminium fins
Two, axial type with two speeds
495
495
3
3
2217
1978
870
870
1/2
1/2
1/2
Two-speed axial type
710
7
3530
900
710
7
3530
900
710
7
3530
900
72
78
78
80
Sound levels
Sound power level 10-12 W*
*
dB(A)
74
Declared dualnumber noise emission values in accordance with ISO 4871 (with an associated uncertainty of +3dB). The values have been rounded and are for information only and not contractually binding.
Table II: Electrical data - Model RQ
30RQ
017
021
026
033
040
Power
V-ph-Hz
400-3-50
400-3-50
Voltage range
V
340-460
360-440
Starting current*
A
75
95
118
118
176
Maximum power drawn (Vn) **
kW
7.8
9.1
11.0
13.8
17.5
Nominal current drawn***
kW
8
12
16
17
25
Maximum current (Vn) ****
A
13
16
20
24
30
Maximum current (Vn +/-15 or 10%) †
A
15
18
23
27
36
* Max. starting current within the operation limits (corresponding to the current of locked rotor in the compressor)
** Input power when the unit is at its operation limits (evaporation temperature = 10°C, condensation temperature = 65°C) and at the rated voltage (400 V)
*** The currents shown refer to Eurovent conditions (evaporator water inlet and outlet temperature = 12/7°C with air to the condenser at 35°C)
**** Max. operating current related to the max. input power and rated voltage (400 V)
† Max. operating current related to the max. input power and within the range 340-460 V for units size 17 to 33 kW, and 360-440 V for units size 40 kW.
GB - 3
30RBY
Physical data and electrical data - Model RBY
Table I: Physical data - Model RBY
30RBY
Operating weight**
with hydronic module
without hydronic module
Refrigerant charge R-410A
Compressor
Evaporator
Net water volume
Water connections (MPT gas)
Maximum water pressure
(unit without hydronic module)
Maximum water pressure
017
021
026
033
040
Kg
Kg
209
193
228
213
255
237
280
262
291
273
Kg
5.5
6.4
One scroll compressor
5.8
8.6
8.8
l
inches
kPa
One plate heat exchanger
1.52
1.9
1
1
1000
1000
1.71
1-1/4
1000
2.28
1-1/4
1000
3.8
1-1/4
1000
kPa
400
400
400
400
inches
inches
l
bar
Pump, mesh filter, expansion tank, flow switch, pressure gauges, automatic air purge valve and drain plug
and safety valve.
One single-speed pump
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1
1
1-1/4
1-1/4
1-1/4
5
5
8
8
8
1.5
1.5
1.5
1.5
1.5
(unit with hydronic module)
Hydronic module
Pump
Water inlet connection (MPT gas)
Water outlet connection (MPT gas)
Closed expansion tank water volume
Pre-charge of expansion vessel
Water fill system (option)
Inlet/outlet diameter (MPT gas)
Condenser
Fan
Diameter
No. of blades
Outlet static pressure
Air flow (high speed)
Fan speed (high speed)
inches
400
1/2
1/2
1/2
mm
1/2
1/2
One, copper tubes and aluminium fins
Two radial fans with backward blades
454
454
Two-speed axial type
630
630
630
5
80
1640
1230
7
80
3472
1290
7
80
3472
1290
7
Pa
l/s
g/min
5
80
1640
1230
3472
1290
82
82
85
85
86
Sound levels
Sound power level 10-12 W*
*
dB(A)
Declared dualnumber noise emission values in accordance with ISO 4871 (with an associated uncertainty of +3dB). The values have been rounded and are for information only and not contractually binding.
Table II: Electrical data - Model RBY
30RBY
017
021
026
033
040
95
118
118
179
Power
V-ph-Hz
400-3-50
Voltage range
V
360 - 440
Starting current*
A
75
Maximum power drawn (Vn) **
kW
8.0
9.3
11.2
14.0
18.5
Rated current***
W
8
12
20
21
28
Maximum current (Vn) ****
A
13
16
20
24
34
Maximum current (Vn +/-10%) †
A
15
18
23
27
39
* Max. starting current within the operation limits (corresponding to the current of locked rotor in the compressor)
** Input power when the unit is at its operation limits (evaporation temperature = 10°C, condensation temperature = 65°C) and at the rated voltage (400 V)
*** The currents shown refer to Eurovent conditions (evaporator water inlet and outlet temperature = 12/7°C with air to the condenser at 35°C)
**** Max. operating current related to the max. input power and rated voltage (400 V)
† Max. operating current related to the max. input power and within the range 360-440 V.
GB - 4
30RQY
Physical data and electrical data - Model RQY
E N G L I S H
Table I: Physical data - Model RQY
30RQY
Operating weight**
with hydronic module
without hydronic module
Kg
Kg
Refrigerant charge R-410A
Kg
Compressor
017
021
026
033
040
226
211
243
228
280
262
295
277
305
287
6.4
7.7
7.6
9.5
9.8
One scroll compressor
Evaporator
Net water volume
Water connections (MPT gas)
Maximum water pressure
(unit without hydronic module)
Maximum water pressure
(unit with hydronic module)
Hydronic module
l
inches
kPa
One plate heat exchanger
1.52
1.9
1
1
1000
1000
2.28
1-1/4
1000
2.85
1-1/4
1000
3.8
1-1/4
1000
kPa
400
400
400
400
Pump
Water inlet connection (MPT gas)
inches
Pump, mesh filter, expansion tank, flow switch, pressure gauges, automatic air purge valve and drain plug
and safety valve.
One single-speed pump
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
Water outlet connection (MPT gas)
Closed expansion tank water volume
Pre-charge of expansion vessel
inches
l
bar
1
5
1.5
inches
mm
1/2
1/2
One, copper tubes and aluminium fins
Two radial fans with backward blades
454
454
Pa
l/s
g/min
5
80
1640
1230
82
Water fill system (option)
Inlet/outlet diameter (MPT gas)
Condenser
Fan
Diameter
No. of blades
Outlet static pressure
Air flow (high speed)
Fan speed (high speed)
400
1
5
1.5
1-1/4
8
1.5
1-1/4
8
1.5
1-1/4
8
1.5
1/2
1/2
1/2
Two-speed axial type
630
630
630
5
80
1978
1230
7
80
3472
1290
7
80
3472
1290
7
3472
1290
82
85
85
86
Sound levels
Sound power level 10-12 W*
*
dB(A)
Declared dualnumber noise emission values in accordance with ISO 4871 (with an associated uncertainty of +3dB). The values have been rounded and are for information only and not contractually binding.
Table II: Electrical data - Model RQY
30RQY
017
021
026
033
040
75
95
118
118
179
kW
8.0
9.3
11.2
14.0
18.5
W
8
12
20
21
28
Maximum current (Vn) ****
A
13
16
20
24
34
Maximum current (Vn +/-10%) †
A
15
18
23
27
39
Power
V-ph-Hz
400-3-50
Voltage range
V
360 - 440
Starting current*
A
Maximum power drawn (Vn) **
Nominal current drawn***
* Max. starting current within the operation limits (corresponding to the current of locked rotor in the compressor)
** Input power when the unit is at its operation limits (evaporation temperature = 10°C, condensation temperature = 65°C) and at the rated voltage (400 V)
*** The currents shown refer to Eurovent conditions (evaporator water inlet and outlet temperature = 12/7°C with air to the condenser at 35°C)
**** Max. operating current related to the max. input power and rated voltage (400 V)
† Max. operating current related to the max. input power and within the range 360-440 V.
GB - 5
30RB/30RQ - 30RBY/30RQY
Dimensions and location of hydraulic connections (mm)
Mod. 30RB 017 - 021
Mod. 30RQ 017 - 021
1 water inlet
2 water outlet
3 fill kit connection
4 safety valve outlet
5 electrical connections
1. Ingresso acqua
(Fixing holes ø 10)
(Fixing holes ø 10)
2. Uscita acqua
3. Uscita valvola di sicurezza 3/4” gas
Mod. 30RBY 017 - 021
Mod. 30RQY 017 - 021
GB - 6
2. Uscita acqua
(Fixing holes ø 10)
(Fixing holes ø 10)
1 water inlet
2 water outlet
3 fill kit connection
4 safety valve outlet
5 electrical connections
1. Ingresso acqua
3. Uscita valvola di sicurezza 3/4” gas
30RB/30RQ - 30RBY/30RQY
Dimensions and location of hydraulic connections (mm)
E N G L I S H
Mod. 30RBY 017 - 021xxA
Mod. 30RQY 017 - 021xxA
NUOVA IMMAGINE
(Fixing holes ø 10)
(Fixing holes ø 10)
1 water inlet
2 water outlet
3 fill kit connection
4 safety valve outlet
5 electrical connections
Mod. 30RBY 017 - 021xxB
Mod. 30RQY 017 - 021xxB
1 water inlet
2 water outlet
3 fill kit connection
4 safety valve outlet
5 electrical connections
(Fixing holes ø 10)
NUOVA IMMAGINE
(Fixing holes ø 10)
GB - 7
30RB/30RQ - 30RBY/30RQY
Dimensions and location of hydraulic connections (mm)
Mod. 30RB 026 - 040
Mod. 30RQ 026 - 040
760
1790
995
153
263
148
710 (Fixing holes ø 10)
129
745 (Fixing holes ø 10)
1002
824
1 water inlet
2 water outlet
3 automatic fill kit connection (optional)
4 electrical connections
Mod. 30RBY 026 - 040
Mod. 30RQY 026 - 040
(Fixing holes ø 10)
1 water inlet
2 water outlet
3 automatic fill kit connection (optional)
4 electrical connections
GB - 8
(Fixing holes ø 10)
129
115
357
50
170
460
170
30RB/30RQ - 30RBY/30RQY
User interface and main switch
E N G L I S H
Service door
User interface*
Disconnector
Service door
User interface*
Disconnector
* Check that the user interface is protected as described in section “Electronic control”.
Clearances (mm) for horizontal outlet
unit (30RB-30RQ017-021)
200 mm
Clearances (mm) for vertical outlet unit
(30RB-30RQ026-040)
500 mm
700 mm
200 mm
400 mm
200 mm
300 mm
700 mm
500 mm
200 mm
400 mm
300 mm
400 mm
200 mm
400 mm
400 mm
400 mm
500 mm
200 mm
200 mm
400 mm
200 mm
1800 mm
200 mm
1000 mm
200 mm
1000 mm
For units with a variable speed pump, leave a suitable space for easy access to
the driver. To reach the driver, remove the rear or side right panel of the unit.
GB - 9
30RB/30RQ - 30RBY/30RQY
General information and hydronic module
Unit installation
Read this manual thoroughly before starting machine installation.
The device complies with the low voltage directives, Machinery
Directive and EMC Directive.
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ensure that a properly sized and connected ground wire is in place.
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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 mains
supply circuit.
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system functions to the owner.
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periodic maintenance.
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for loosen, damaged or broken components. In case of persisting
defects, the unit may cause personal injury or property damage.
IMPORTANT :
During the unit installation make first the hydronic connections and
then electrical connections. If unit is uninstalled first disconnect
electrical cables, then the hydronic connections.
CAUTION :
Disconnect the mains power supply switch before servicing the
system or handling any internal parts of the unit.
CAUTION:
Typical applications of these units are in refrigeration
systems, and they do not require earthquake resistance.
Earthquake resistance has not been verified.
Installation instructions for ductable units
Units 30RBY and 30RQY (ductable unit ) can be installed in buildings and
connected by means of duct systems
- on the outside air inlet side (only units size 17-21 kW)
- on the fan side where the air is released after passing through the air/
refrigerant exchanger.
Therefore the unit can be installed in a building without changing the
indoor air temperature.
These units are designed for a static pressure of 80 Pa: for this
reason, the friction loss of any intake duct added up to the friction
loss of the supply duct must not exceed the indicated value. For
units size 17-21 kW: if the units are not provided with a supply duct,
a protective grille must be installed to prevent access to fans.
Unit with optional intake filters (size 17 -21 kW).
Access to filters for maintenance of units 17 and 21 kW is possible by
removing the screws on the filter support side.
After removing the screws remove the closing panel.
Remove the filters on the unit back side as shown below.
The friction loss of the filters with nominal air flow is 7 Pa.
Check the filter is clean every two or three months (more often if the
unit is installed in a dusty place) and when the friction loss is twice the
nominal value.
A dirty filter causes a decrease in air flow and in the unit efficiency.
The filter should be cleaned with air (not water) as it is made of
aluminium.
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modifications or errors in the electrical or hydronic connections.
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conditions other than those indicated in Tables “Operating limits”, will
immediately void the unit warranty.
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of short circuits.
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reach a temperature in excess of 70oC, so only trained and qualified
personnel should access areas protected by access panels.
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power supply and contact a qualified service engineer.
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new appliance are compatible with the environment and can be
recycled.
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requirements.
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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.
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when servicing. Never vent refrigerant to atmosphere.
Choosing the installation site
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residential, commercial and light industrial installations. For other
applications, please consult Carrier.
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less than 0 °C the unit must be installed at least 300 mm above ground
level. This is necessary to prevent ice from accumulating on the frame
and to permit correct operation also in the event of heavy snowfalls.
The unit must be levelled on both axes (the tolerance is less than 2
mm per metre).
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winds and to stop snow from hitting the coil directly. These deflectors
must be installed so that the normal air circulation is not obstructed.
GB - 10
2
3
1
3
2
1
3
3
30RB/30RQ - 30RBY/30RQY
General information and hydronic module
Fan supply
The standard ducted units are supplied with a rectangular flange.It is
advisable to connect the supply duct by interposing a flexible joint to
avoid vibrations and noise are transmitted to the building structure. Do
not use ducts with a weight exceeding 10 kg to avoid damages to the
unit.
Make sure all intake inlets and air outlets are free from any obstacle
(such as an open door).
Auxiliary condensate drain pan
During the heat pump operation, it might be necessary to drain up to
15 l of condensate.
On demand, Carrier may supply an optional condensate drain pan to be
placed under the unit. The corresponding codes are 30RB9003 (for units
17 – 21 kW) and 30RB9004 (for units 26 – 40 kW).
The pan must then be connected to the condensate drainage system
by means of a ø 16 mm vinyl pipe (use the condensate drainage
connection supplied with the pan).
On sizes 26- 40 kW, it is possible to disconnect the end of the
condensate drain pipe which is fixed to the rear panel and convey the
condensate water from the heat exchanger to the auxiliary pan.
When installing the pan, make sure it is levelled and that the
condensate water from the unit is discharged correctly.
E N G L I S H
- Vibration absorbers have been provided throughout the installation to
prevent noise from being transmitted.
- To avoid possible damages (in particular to sizes 26-40 kW) fix the
vibration absorbers under a feet-supporting frame of the unit.
Transport
1. Use spreader bars to lift the unit to avoid damage to the panels.
Avoid violent movements.
2. Never roll or swing the unit more than 15°.
IMPORTANT:
Ensure that all unit panels are fixed in place before moving the unit.
Raise and set down the unit carefully.
IMPORTANT:
Always ensure that the unit is levelled correctly.
Siting the unit
Check that:
- The location is able to support unit operating weight (Table I).
- There is sufficient space for servicing and air flow around the unit (see
“Clearances”figure).
- The selected site is without dust or foreign material which could
obstruct the coil.
- When installing the unit on the ground, the selected site is not subject
to flooding.
- The installation is in accordance with local rules and standards
governing the installation of air conditioning equipment.
Condensate pan
Connection
GB - 11
30RB/30RQ - 30RBY/30RQY
General information and hydronic module
Hydronic module
Hydronic module for 30RB/30RQ026-040 unit
The hydronic module is factory-installed.
This eliminates the need to install the necessary components
on-site, making the unit more compact and easy to install.
1
4
Hydronic module for 30RB/30RQ017-021 unit
7
1
4
6
2
8
1 automatic purge
2 pressure gauge for
hydraulic circuit static
pressure
3 hydronic module drain
valve
4 hydronic module pump
5 safety valve
6 flow switch
7 expansion vessel
8 mesh filter
9 pressure reducer (optional)
POPòWBMWFPQUJPOBM
IN
9
6
7
10
OUT
IN
OUT
IN
5
8
IN
3
9
1
2
3
10
4
5
automatic purge
pressure gauge for
hydraulic circuit static
pressure
hydronic module
drain valve
hydronic module
pump
safety valve
6
7
8
9
10
Water connections
Typical diagram of hydronic circuit with hydronic module 17-21kw
--- Hydronic module (units with hydronic module)
- - - - Water supply automatic system (optional)
GB - 12
2
5
flow switch
expansion vessel
mesh filter
pressure reducer (optional)
POPòWBMWFPQUJPOBM
3
30RB/30RQ - 30RBY/30RQY
Water connections
E N G L I S H
Typical diagram of hydronic circuit
with hydronic module 26-40kw
--- Hydronic module (units with hydronic module)
- - - - Water supply automatic system (optional)
LEGEND
HYDRONIC COMPONENTS
1 Mesh filter
2 Expansion tank
3 Safety valve
4 High pressure pump
5 Breather
6 Water drain valve
7 Flow sensor
8 Leaving temperature sensor from refrigerant - water exchanger
9 Entering temperature sensor from refrigerant - water exchanger
10 Pressure gauge
11 Plate heat exchanger
12 Anti-freeze electric heater for refrigerant - water exchanger
13 Anti-freeze electric heater for pipes
0OPòWBMWFBVUPNBUJDTZTUFNGPSXBUFSöMMJOHPQUJPOBM
15 Pressure reducer (automatic system for water filling- optional)
Make the plate heat exchanger hydraulic connections with the
necessary components, using material which will guarantee that the
screwed joints are leakproof.
The typical hydraulic circuit diagram shows a typical water circuit
installation in an air conditioning system.
For an application with a water circuit, the following recommendations
must be taken into account:
1. The pump must be fitted immediately before of the heat exchanger
and after the connection to the system return (unit without hydronic
module).
*UJTBEWJTBCMFUPJOTUBMMTIVUPòWBMWFTUPBMMPXJTPMBUJPOPGUIFNPTU
important circuit components, as well as the heat exchanger itself.
These valves (ball, globe or butterfly valves) should produce a
minimum loss of charge when they are open.
3. Provide unit and system drains and vents at the lowest system point.
4. Install purges in the higher sections of the installation.
5. Pressure ports and pressure gauges should be installed upstream
and downstream of the water pump (unit without hydronic module).
6. Thermometers should be installed in the unit water inlet and outlet.
7. All piping must be adequately insulated and supported.
Installation of the following components is obligatory:
1. The presence of particles in the water can lead to obstructions in the
heat exchanger.
It is therefore necessary to protect the heat exchanger inlet with an
extractable mesh filter. The filter mesh gauge must be at least 10
mesh/cm2.
The equipment standard version with hydronic module is equipped
with mesh filter, included in the supply and installed.
2. After assembling the system, or repairing the circuit, the whole
system must be thoroughly cleaned with special attention paid to
the state of the filters.
SYSTEM COMPONENTS
16 Pocket for temperature sensor
17 Breather
18 Flexible connections
0O0òWBMWF
20 Mesh filter (compulsory if the unit is not equipped with hydronic module)
21 Pressure gauge
22 Water flow control valve (factory supplied but to be installed on site)
23 Charge valve
#ZQBTTWBMWFGPSBOUJGSFF[FQSPUFDUJPOXIFOJOXJOUFSPOPòWBMWFTBSF
closed)
25 Pressure sensor
26 Water drain valve from the plant
27 Water drain valve from refrigerant-water exchanger
3. Pump flow rate control is made through a flow control valve supplied
with the unit with hydronic module, which must be installed on the
delivery pipe during installation.
4. When water has to reach temperatures below 5°C, or the equipment
is installed in areas subject to temperatures below 0°C, it is necessary
to mix water with glycol in suitable quantity.
The maximum amount of ethylene and propylene glycol allowed is
30%.
Frost protection
Frost protection of the plate heat exchanger and of the circuit inside the
hydronic module is always guaranteed down to -10°C by the electric
heaters that are automatically activated if needed. The power supply
to the electric heaters of the plate heat exchanger and to the internal
circuit of the hydronic module must never be interrupted.
IMPORTANT: Filling, completing and draining the water circuit
charge must be done by qualified personnel, using the air purges
and materials that are suitable for the products.
Before any start-up verify that the heat exchange fluid is
compatible with the materials and the water circuit coating.
GB - 13
30RB/30RQ - 30RBY/30RQY
Carrier recommendations on heat exchange fluids:
t/P/)4+ ammonium ions in the water, they are very detrimental for
copper. This is one of the most important factors for the operating life
of copper piping. A content of several tenths of mg/l will badly corrode
the copper over time (the plate heat exchangers used for these units
have brazed copper joints).
t$M$IMPSJEFJPOTBSFEFUSJNFOUBMGPSDPQQFSXJUIBSJTLPGQFSGPSBUJPOT
by corrosion by puncture. If possible keep below 10 mg/l.
t4042- sulphate ions can cause perforating corrosion, if their content is
above 30 mg/l.
t/PøVPSJEFJPOTNHM
t/P'F2+ and Fe3+ ions with non negligible levels of dissolved oxygen
NVTUCFQSFTFOU%JTTPMWFEJSPONHMXJUIEJTTPMWFEPYZHFO
mg/l.
t%JTTPMWFETJMJDPOTJMJDPOJTBOBDJEFMFNFOUPGXBUFSBOEDBOBMTPMFBE
UPDPSSPTJPOSJTLT$POUFOUNHM8BUFSIBSEOFTTNNPMM
Values between 1 and 2.5 can be recommended. This will facilitate
scale deposit that can limit corrosion of copper. Values that are too
high can cause piping blockage over time. A total alkalimetric titre
(TAC) below 100 is desirable.
t%JTTPMWFEPYZHFO"OZTVEEFODIBOHFJOXBUFSPYZHFOBUJPO
conditions must be avoided. It is as detrimental to deoxygenate the
water by mixing it with inert gas as it is to over-oxygenate it by mixing
it with pure oxygen. The disturbance of the oxygenation conditions
encourages destabilisation of copper hydroxides and enlargement of
particles.
t &MFDUSJDDPOEVDUJWJUZ˜4DN
t Q)*EFBMDBTFQ)OFVUSBMBU¡$Q)
Do not introduce any significant static or dynamic pressure into the heat
exchange circuit (with regard to the design operating pressures).
GB - 14
30RB/30RQ
Water connections
E N G L I S H
Water pressure drop of the unit without hydronic module
110
1
100
2
3
4
5
90
80
Pressure drop , kPa
70
60
6
50
40
30
20
10
0
0.0
0.5
1.0
1.5
2.0
2.5
Water flow rate, l/s
Legend
1. 30RB-RQ017
2. 30RB-RQ021
3. 30RB026
4. 30RB033-RQ026
5. 30RQ033
6. 30RB-RQ040
Available static pressure, kPa
Outlet available static pressure of the unit with hydronic module
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
3
6
2
1
5
4
0.0
0
0
0.5
05
1.0
10
1.5
15
Water flow rate, l/s
2.0
20
2.5
25
Legend
1. 30RB-RQ017
2. 30RB-RQ021
3. 30RB026
4. 30RB033-RQ026
5. 30RQ033
6. 30RB-RQ040
GB - 15
30RB/30RQ - 30RBY/30RQY
Electrical connections and refrigerant charge
Electrical connections
The protection level of all the control boxes is IPX4.
CAUTION:
To prevent electrical shock or equipment damage, make sure
disconnects are open before electrical connections are made.
Liquid refrigerant charge
Power supply cable size and external connection must be made by
the installer according to the unit installation characteristics and the
applicable standards. The power supply and earth multicore cable of
the device has to be connected to the general disconnector by routing
the cable through the grommet installed in the device, after removing
the access panel/s. The maximum section allowable for flexible copper
cable is 25 mm2. Before connection, check that phase sequence
L1 – L2 – L3 is correct. The table below should be considered as a
reference and does not involve Carrier responsibility.
CAUTION:
Accidental exhaust of refrigerant, whether due to a small leak or
to a large discharge from a piping rupture, can cause frostbites
and burns to the exposed person. Never neglect such injures. The
installers, owners and especially the repairers for small outdoor
units, must:
- set a procedure to consult medical experts prior to treat such
injuries,
- provide first aid equipments, especially for rapid treatment of eye
injuries.
Checking the charge
30RB/30RQ 30RB/30RQ 30RB/30RQ 30RB/30RQ 30RB/30RQ
017
021
026
033
040
Unit
Cable section
5 x2.5 mm²
Power supply
cable
Fuse (type "gG") 25 A
5 x4 mm²
1x16 mm²
H07 RN-F
32A
40 A
50 A
63A
Take special care when making the earth connection.
The maximum permitted voltage and current imbalance is 10% of the
values indicated in Table II.
Contact your local power company for correction of an incorrect line
voltage.
CAUTION:
Operation of the unit on improper line voltage constitutes abuse and is
not covered by the Carrier warranty.
IMPORTANT:
To ensure the correct unit power supply (cable entry, conductor cross
section, protection devices etc.), consult the electrical data table, the
wiring diagram supplied with the unit and the applicable standards
concerning the installation of air conditioning equipment.
Never operate a unit if the voltage imbalance exceeds 2%.
The following formula must be used to determine the percentage of
voltage imbalance.
Voltage imbalance (%) =
Largest deviation from average voltage x 100
———————————————————————————Average voltage
Example:
Supply voltage: 400-3-50
AB =
BC =
AC =
404 V
399 V
394 V
Motor
Average voltage = 404 + 399 + 394 = 399 ≈ 400 V
3
Determine maximum deviation from average voltage:
AB =
BC =
AC =
404 - 400 = 4
400 - 399 = 1
400 - 394 = 6
Largest deviation is 6 volts. Percentage voltage imbalance is therefore:
6
400
x 100 = 1.5 %
CAUTION:
The installer must install protection devices, as required by the
applicable legislation.
For sizes 17-21 kW, the power supply cable must be routed through the
grommet of the electric control panel. To connect the power supply
cable to the main disconnector remove the metal protection box (by
removing the two fixing screws). After completing all connections,
re-install the protection box by fixing the two screws which were
previously removed.
The pressure gauge and the liquid level gauge can be checked by
removing the plugs from the side panel (there is no need to remove the
whole panel).
GB - 16
We recommend them to apply the EN 378-3 Annex 3.
When adjusting the refrigerant charge, always ensure that water
is circulating in the heat exchanger to prevent any possibility of
freezing up. Damage caused by freezing is not covered by the
product warranty.
30RB-RQ units are shipped with a full operating charge of refrigerant.
Refer to Table I.
If it is nevertheless necessary to add more refrigerant, run the unit for
some time in cooling mode and then slowly add liquid refrigerant into
the suction side until there are no bubbles in the sight glass.
30RB-RQ units use a R-410A refrigerant charge. For your information,
we are reproducing here some extracts from the official publication
dealing with the design, installation, operation and maintenance
of air conditioning and refrigeration systems and the training of
people involved in these activities, agreed by the air conditioning and
refrigeration industry.
Refrigerant guidelines
Refrigeration installations must be inspected and maintained regularly
and rigorously by specialists. Their activities must be overseen and
checked by properly trained people.
To minimise discharge to the atmosphere, refrigerants and lubricating
oil must be transferred using methods which reduce leaks and losses to
a minimum.
If an oil draining or recovery operation becomes necessary, the fluid
transfer must be made using mobile containers.
t -FBLTNVTUCFSFQBJSFEJNNFEJBUFMZ
t 4FSWJDFWBMWFTöUUFEUPUIFøPXBOESFUVSOMJOFTQFSNJUDIBSHFUSBOTGFS
to a suitably arranged external container.
t *UJTJOEJTQFOTBCMFUPVTFBEFEJDBUFEUSBOTGFSTUBUJPO
t $PNQSFTTPSMVCSJDBUJOHPJMDPOUBJOTSFGSJHFSBOU"OZPJMESBJOFEGSPN
a system during maintenance must therefore be handled and stored
accordingly.
t 3FGSJHFSBOUVOEFSQSFTTVSFNVTUOFWFSCFEJTDIBSHFEUPUIF
atmosphere.
Recharging liquid 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.
The cylinders that contain R-410A are pink.
The cylinders that contain R-410A are provided with a dip tube that
allows fluid to escape from the cylinder both when in upright position
and when turned upside down.
Unit R-410A should be charged with liquid refrigerant. Apply a common
flow regulator available on the market to the hose pipe to vaporize the
liquid refrigerant before it enters the unit.
R-410A, like other HFCs, is only compatible with the oils selected by the
manufacturer of compressors(POE).
NOTE:
Regularly carry out leak checks and immediately repair any leak found.
30RB/30RQ - 30RBY/30RQY
Refrigerant charge and electronic control
Undercharge
If there is not enough refrigerant in the system, this is indicated by gas
bubbles in the moisture sight glass.
There are two possibilities:
t 4NBMMVOEFSDIBSHFCVCCMFTJOUIFTJHIUHMBTTOPTJHOJöDBOUDIBOHFJO
suction pressure).
- After detection and repair the unit can be recharged.
- The replenishment of the charge must always be done in the
cooling mode, slowly introducing liquid refrigerant at the suction
side, until there are no bubbles in the sight glass.
t 4JHOJöDBOUVOEFSDIBSHFMBSHFCVCCMFTJOUIFTJHIUHMBTTTJHOJöDBOU
drop in suction pressure). In this case:
- Completely drain the refrigerant charge, using a refrigerant recovery
VOJU"GUFSEFUFDUJPOBOESFQBJSDIFDLUIFDIBSHFXJUIUIFVOJUPò
drain the system and recharge the full amount of liquid refrigerant
(see Table I) on the suction and discharge side.
- The refrigerant container used must contain a minimum of 10% of
its initial charge.
CAUTION:
If brazing is to be done, the refrigerant circuit must be filled with
nitrogen.
Combustion of refrigerant produces toxic phosgene gas.
Change the refrigerant after an equipment failure, following a
procedure such as the one described in NF E29-795 or carry out a
refrigerant analysis in a specialist laboratory.
IMPORTANT:
Never use the compressor as a vacuum pump.
Always add refrigerant via the suction line.
Refrigerant must be added very slowly.
Do not overcharge the system with refrigerant.
If the refrigerant circuit remains open for longer than a day after an
intervention (such as a component replacement), the openings must
be plugged and the circuit must be charged with nitrogen (inertia
principle). The objective is to prevent penetration of atmospheric
humidity and the resulting corrosion on the internal walls and on nonprotected steel surfaces.
E N G L I S H
Electronic control
Operation and control of all units is carried out via the electronic control.
The instructions supplied with the control include comprehensive
descriptions.
After use, check the user interface is properly inserted into its housing
and the cover is closed by means of the screw supplied. This way, the
electronic control and the unit are protected against any impacts and
atmospheric agents.
PRO-Dialog + electronic control
PRO-DIALOG + is an advanced numeric control system that combines
complex intelligence with great operating simplicity.
PRO-DIALOG + constantly monitors all machine parameters and safety
devices, and precisely manages the operation of compressor and fans
for optimum energy efficiency.
It also controls the operation of the water pump.
A powerful control system
The PID control algorithm with permanent compensation for the
EJòFSFODFCFUXFFOFOUFSJOHBOEMFBWJOHXBUFSUFNQFSBUVSFBOE
anticipation of load variations regulates compressor operation for
intelligent leaving water temperature control.
To optimise power absorption, the PRO-DIALOG + automatically recalibrates the set point of the entering water temperature based on
the outside air temperature to one of the two pre-set values (occupied
building and of an unoccupied building for example).
PRO-DIALOG + control is auto-adaptive for full compressor protection.
The system permanently optimises compressor run times according to
the application characteristics (water loop inertia), preventing excessive
cycling. In most comfort air conditioning applications this feature makes
BCVòFSUBOLVOOFDFTTBSZ
Clear and easy-to-use control system
The operator interface is clear and user-friendly: two LEDs and digital
displays allow the immediate control of the device operating data.
5IFNFOVTPòFSEJSFDUBDDFTTUPBMMNBDIJOFDPOUSPMTJODMVEJOHBIJTUPSZ
of possible faults, for rapid and complete chiller fault diagnosis.
Extended communications capabilities
PRO-DIALOG + allows remote control and monitoring of the unit
through a wired connection: 7-8 x 0.5 mm² multiple cables. The cable
should be screened of the FROH2R or BELTEN 9842 type.
The screening should be grounded only on the electric unit panel board.
Functions available are start/stop, cooling/heating mode selection (only
30RQ unit), power demand limit or dual set-point and customer safety
lock.
The system permits remote signalling of any general anomaly for each
refrigerant circuit.
Three independent time schedules permit definition of: chiller start/
stop, operation at the second set-point (e.g. unoccupied mode), and
operation at low fan speed (e.g. during the night).
This option also permits cascade operation of two units and remote
control via communication bus (RS 485 serial port).
GB - 17
30RB/30RQ - 30RBY/30RQY
Start-up, compressor replacement
Start-up
Compressor replacement
Unit start-up is done by the electronic control described above, and
must always be carried out under the supervision of a qualified air
conditioning engineer.
As the compressors are hermetic, when an internal fault occurs, the
compressor must be replaced.
For sizes 26 to 40, access to the oil level gauge is possible by removing
the 6 screws of the electric box.
This must be done as detailed below:
This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or
instruction concerning the use of the appliance by a person responsible
for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
Necessary checks/precautions before start-up
- Ensure that all electrical connections are properly tightened.
- Ensure that the unit is level and well-supported.
- Check that the hydraulic circuit has sufficient water flow and that the
pipe connections correspond to the installation diagram.
- Ensure that there are no water losses. Check the correct operation of
the valves installed.
- All panels should be fitted and firmly secured with the corresponding
screws.
- Make sure that there is sufficient space for servicing and maintenance
purposes.
- Ensure that there are no refrigerant leaks.
- Confirm that the electrical power source agrees with the unit
nameplate rating, wiring diagram and other documentation for the
unit.
- Ensure that the power supply corresponds to the applicable standards.
- Make sure that compressors float freely on the mounting springs.
- Disconnect the unit from the electrical supply.
- Remove the access panels.
- Remove the gas from the refrigerant circuit using recovery equipment
to avoid harming the atmosphere.
- Electrically disconnect the compressor.
- Unbraze or unscrew the suction and discharge lines, taking care not to
damage the rest of the components.
- Remove the compressor fastenings.
- Replace the compressor, ensuring that it contains sufficient oil.
- Braze or screw in the lines.
- Connect the compressor according to the wiring diagram.
- Evacuate the compressor.
- Introduce the quantity of refrigerant indicated on the nameplate
through the service couplings located on the high and low pressure
side.
NOTE:
This operation must be carried out by a qualified person.
Shift the electric box to allow access to the oil level gauge.
Screws to be removed
GB - 18
30RB/30RQ - 30RBY/30RQY
Pump replacement, unit protection devices
E N G L I S H
Table III: Pressure switch settings
Pump replacement
Cut-out
If the water pump needs to be replaced, proceed as follows:
- Disconnect the unit from the power supply.
- Open/remove the access panel/s
- Electrically disconnect the pump.
- Empty all water from the hydronic module.
- Loosen the pipe unions 1 and 3.
- Remove the four pump fixing screws 2.
- Replace the pump.
- Fit the pump fixing screws 2.
- Tighten the pipe unions 1 and 3.
- Electrically connect the pump.
- Connect the unit to the power supply.
- Make sure the pump rotates in the right direction using the hole in the
back panel.
- Reinstall the lateral access panel.
Reset
High pressure switch (017 to 033)
44 bar
Manual
High pressure switch (040)
44.2 bar
Automatic
CAUTION: Alteration of factory settings other than the design set-point,
without manufacturer's authorisation, may void the warranty.
In case of use other than the manufacturer configuration, Carrier Service
must be asked for permission to change the Pro-Dialog + system
configuration.
Operating limits 30RB
These units have been designed to operate within the following limits:
Evaporator
Minimum °C Maximum °C
Water entering temp. (at start-up)
Water leaving temp. (in operation)
Condenser
7.8*
5**
30
18
Air entering temperature
-10
48
Operating limits 30RQ
1
Cooling cycle
Plate heat exchanger
Water entering temp. (at start-up)
Water leaving temp. (in operation)
Coil:
Air entering temperature
Minimum °C Maximum °C
7.8*
30
5**
18
-10
48
Minimum °C
10
20
Minimum °C
-15***
Maximum °C
45
50
Maximum °C
40
Heating cycle
Plate heat exchanger
Water entering temp. (at start-up)
Water leaving temp. (in operation)
Coil:
Plate heat exchanger
*
**
1 pipe union
2 screw
3 pipe union
***
2
3
Description of unit protection devices
Contact Carrier if an entering water temperature lower than 7.8 °C is
necessary.
If glycol is used but leaving water temperatures are greater than 5°, select
option "medium brine" by the user interface. UI by selecting the "medium
brine". If you are using but the glycol outlet temperature is greater than 5 ° C,
you must select the user interface option "medium brine"
-13°C for units size 40kW.
Minimum and maximum water flow rates in the
plate heat exchangers
Minimum flow rate, Maximum flow rate, Maximum flow rate,
l/s
l/s*
l/s**
The unit includes the following protection devices:
-
Internal compressor protection.
Fan motor internal thermal protection (unit sizes 26, 33 and 40kW).
Main switch.
Thermomagnetic control and heaters protection.
Thermomagnetic fan protection (unit sizes 17, 21 and 40 kW).
Defrost thermostat.
Fault detector for the temperature and pressure sensors.
High pressure switch: this protects the unit against excessive
condensing pressure.
The high pressure switch has factory-fixed non-adjustable settings.
The appliance stops due to the intervention of the high pressure alarm
threshold, before the high pressure switch intervenes.
This function is performed by the electronic control device via a
pressure transducer.
- Low pressure switch: This function is performed by the electronic
control device via a pressure transducer.
Only on appliances with hydronic module.
- Pump motor:
t external thermal protection (unit sizes 17 to 33 kW)
t thermomagnetic protection (only unit sizes 40 kW).
30RB-RQ017
30RB-RQ021
30RB026
30RQ026
30RB033
30RQ033
30RB-RQ040
*
**
0.45
0.57
0.67
0.67
0.87
0.87
1.05
1.4
1.6
2
2.2
2.2
2.3
2.6
1.3
1.5
1.5
1.8
1.8
1.9
2.7
Maximum water flow rate with an available static pressure of 50 kPa (units with
hydronicmodule)
Maximum water flow rate at a plate heat exchanger pressure drop of
100 kPa (units without hydronic module)
Water circuit water content
Whatever the size of the system, the minimum content of the water
circuit is given by the following formula:
Content = CAP(kW) x N = Litres
where CAP is the nominal system capacity (kW) at nominal operating
conditions of the installation.
Application
Air conditioning
Industrial process cooling
N
3.5
See note
GB - 19
30RB/30RQ - 30RBY/30RQY
Unit protection devices, operating limits and operating range
The water content is necessary to ensure the stability of plant operation
and accurate temperature control.
*UJTPGUFOOFDFTTBSZUPBEEBCVòFSXBUFSUBOLUPUIFDJSDVJUJOPSEFSUP
achieve the required volume.
Operating range - 30RB units
53
Maximum water content of hydraulic circuit
The units provided with hydronic module are supplied with an
expansion vessel (in option) to limit the water content of the hydraulic
circuit. The table below shows the maximum content of water and a
mix of water/ethylene glycol of the hydraulic circuit.
Outdoor air temperature °C
48
NOTE:
For industrial process cooling applications, where high stability of
water temperature levels must be achieved, the values above must
be increased.
We recommend consulting the factory for these particular
applications.
43
38
33
28
23
18
13
8
3
-2
-7
-12
-4
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
Leaving water temperature °C
Static pressure
017 - 021
026 - 040
bar
1.5
3
1.5
3
Water
liters
200
50
350
140
GE 10%
liters
150
38
263
105
GE 20%
liters
110
28
193
77
GE 30%
liters
90
23
158
63
GE: ethylene glycol
Operating range - 30RQ units
53
48
Outdoor air temperature °C
30RB-30RQ
43
38
33
28
23
18
13
8
3
-2
-7
-12
-4
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
Leaving water temperature °C
45
Outdoor air temperature °C
40
35
30
25
20
15
10
5
0
‐5
40kW only
‐10
‐15
‐20
15
20
25
30
35
40
Leaving water temperature °C
45
50
55
Notes:
Operating range with anti-freeze solution and with special configuration
of the Pro-Dialog control system
GB - 20
30RB/30RQ - 30RBY/30RQY
General maintenance, maintenance and final recommendations
General maintenance
CAUTION: Before starting any servicing or maintenance operation on
the unit, make sure that the power supply has been disconnected.
A current discharge could cause personal injury.
In order to obtain maximum performance from the unit special
attention should be paid to the following points:
- Electrical connections:
The supply voltage should be within the limits indicated in Table II.
Ensure that no faulty contacts exist in the terminal blocks, contactor
boards, etc.
Make sure that all the electrical connections are properly tightened,
and that all the electrical components (contactors, relays, etc) are
firmly secured to the corresponding rails.
Pay special attention to the condition of the connecting cables
between the control elements and the electrical box, and to that of
the unit power supply cable.
They should not be twisted and there should be no slits or notches in
the insulation.
Check that the starting and running consumptions are within the
limits specified in Table II.
- Water connections:
Make sure there are no water leaks from the system. Should the unit
be shutdown for long periods, open the drain valve installed on the
hydronic module and partially drain the pump and the water pipes
as well as the drain valve on the plate-type exchanger, which must
be installed on the hydraulic circuit. To completely drain the pump,
remove the cap on it. This operation is essential if temperatures are
expected to drop below freezing. If the unit is not drained, the main
switch should remain connected so that the defrost thermostat can
operate. Carefully clean the system water filter.
If the water circuit must be emptied for longer than one month, the
complete circuit must be placed under nitrogen charge to avoid any
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- Plate heat exchanger cleaning:
In some applications, for example when very hard water is used, there
is an increased tendency for fouling. The heat exchanger can always be
cleaned by circulating a cleaning fluid.
A weak acid solution should be used (5% phosphoric acid or, if
frequently cleaned 5% oxalic acid), and the cleaning fluid should be
pumped through the exchanger.
The tank installation can be permanent or, alternatively, the connections
can be prepared and, at any given time, a portable cleaning device can
be connected.
To achieve optimum cleaning the acid solution should be circulated
at a minimum of 1.5 times the normal operational flow speed, and
preferably in reverse direction.
The installation should then be flushed with large amounts of water to
totally remove the acid before the system is started up.
Tank installation
E N G L I S H
Cleaning should be done at regular intervals and should never be left
until the unit has become blocked.
The time intervals between cleaning depend on the quality of the water
used, but as a general rule it is advisable to clean it at least once a year.
- Refrigerant circuit:
Ensure that there is no leakage of refrigerant or oil from the
compressor.
Check that the high and low side operating pressures are normal.
Check the cleanliness of the refrigerant-water heat exchangers by
checking the pressure drop across them.
The compressors do not require any specific maintenance.
Nevertheless the preventive system maintenance operations prevent
specific compressor problems. The following periodic preventive
maintenance checks are strongly recommended:
t Check the operating conditions (evaporating temperature,
condensing temperature, discharge temperature, heat exchanger
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within the compressor operating range.
t Check that the safety devices are all operational and correctly
controlled.
t Check oil level and quality. If there is a colour change in the sight
glass, check the oil quality. This may include an acidity test, moisture
control, a spectrometric analysis etc.
t Check the leak tightness of the refrigerant circuit.
t Check the compressor motor power input, as well as the voltage
imbalance between phases.
t Check the tightening of all electrical connections.
t Ensure that the compressor is clean and runs correctly; verify
that there is no rust on the compressor shell and no corrosion or
oxidation at the electrical connections and the piping.
ATTENTION: The compressor and piping surface temperatures can
in certain cases exceed 100°C and cause burns. Particular caution is
required during maintenance operations. At the same time, when the
compressor is in operation, the surface temperatures can also be very
cold (down to -15°C for units with a low leaving water temperature), and
can cause frost burns.
- Controls:
Check the operation of all the electrical components, the high
pressure switch and of the high and low pressure transducers and the
water, air and defrost temperature detector.
- Coils:
We recommend, that finned coils are inspected regularly to check the
degree of fouling. This depends on the environment where the unit
is installed, and will be worse in urban and industrial installations and
near trees that shed their leaves.
Recommendations for maintenance and cleaning of round tube plate
fin (RTPF) condenser coils (based on the AFNOR X60-010 standard):
t If the condensers are fouled, clean them gently in a vertical direction,
using a brush.
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considerations allow this.
t Clean condensers guarantee optimal operation of your HVAC unit.
This cleaning is necessary when the condensers begin to become
fouled. The frequency of cleaning depends on the season and location
of the HVAC unit (ventilated, wooded, dusty area, etc.).
- Vibration:
Ensure regularly that the vibration levels remain acceptable and close
to those at the initial unit start-up.
Heat exchanger
Weak acid solution
tank
- Corrosion:
Periodically inspect all valves, fittings and pipes of the refrigerant and
hydronic circuits to ensure that they do not show any corrosion or any
signs of leaks; also on components coating.
GB - 21
30RB/30RQ - 30RBY/30RQY
Maintenance
Fire and explosion
Servicing recommendations
- Maintenance of the unit must be carried out by skilled personnel only.
Nevertheless, the easiest operations, such as cleaning of the battery
and the unit external parts can be carried out by non-skilled
personnel.
- No part of the unit must be used as a walkway, rack or support.
Periodically check and repair or if necessary replace any component
or piping that shows signs of damage. Do not step on refrigerant lines.
The lines can break under the weight and release refrigerant, causing
personal injury. Do not climb on a machine. Use a platform, or staging
to work at higher levels.
- For any operation on the unit follow thoroughly the instructions shown
in the manual and on the unit labels as well as the Safety Standards.
During any handling, maintenance and service operations the
engineers working on the unit must be equipped with safety gloves,
glasses, shoes and protective clothing. Pay attention to burns when
brazing.
- Use only Carrier Original Spare Parts when repair is required. Always
make sure the spare parts are installed correctly. Always install the
spare parts in the original position.
- The products that may be added for thermal insulation of the
containers during the water piping connection procedure must be
chemically neutral in relation to the materials and coatings to which
they are applied. This is also the case for the products originally
supplied by Carrier SCS.
- Before replacing any of the elements in the cooling circuit, ensure that
the entire refrigerant charge is removed from both the high and low
pressure sides of the unit.
- The control elements of the cooling system are highly sensitive.
If they need to be replaced, care should be taken not to overheat them
with blowlamps whilst soldering.
A damp cloth should be wrapped around the component to be
soldered, and the flame directed away from the component body.
- Silver alloy soldering rods should always be used.
- If the total unit gas charge has to be replaced, the quantity should be
as given on the nameplate and the unit should be properly evacuated
beforehand.
- During unit operation all panels should be in place, including the
electrical box access panel.
- If it is necessary to cut the lines of the refrigerant circuit, tube cutters
should always be used and never tools which produce burrs. All
refrigerant circuit tubing should be of copper, specially made for
refrigeration purposes.
When this machine is subjected to the heat of a fire, a device prevents
explosion releasing the refrigerant (by a fusible plug). This fluid can be
decomposed into toxic waste when subjected to flame:
- Stay away from this machine,
- Set up the warning and recommendation for personnel responsible for
stopping fire,
- Appropriate fire extinguishers for the system and the refrigerant types
used must be within easy reach.
Final recommendations
The unit you have purchased has undergone strict quality control
procedures before leaving the factory.
All components, including the control systems and electrical equipment,
etc., are certified by our Quality Control Department, and tested
under the harshest possible operating conditions in our laboratories.
However, after leaving the factory, it is possible that one or more of
these elements may be damaged due to causes beyond our control.
In such an event, the user should not work on any of the internal
components, or subject the unit to operating conditions which are
not specified in this manual, since serious damage may result and the
guarantee would be invalidated. Repair and maintenance work should
always be left to the installer.
We recommend to apply the EN 378-4.
All recommendations concerning unit installation are intended as a
guideline. The installer should carry out the installation according to the
design conditions and should comply with all applicable regulations for
air conditioning and refrigeration installations.
NOTE: The manufacturer does not accept responsibility for any
malfunctions resulting from misuse of the equipment.
GB - 22
Log book
Carrier recommends the following drafting for a logbook (the table
below should be considered as reference and does not involve Carrier
responsibility):
Intervention
Date
(1)
Nature
(1)
Name of the
commissioning
engineer
Applicable
national
regulations
Verification
Organism
Maintenance, repairs, regular verifications (EN 378), leakage, etc.
30RB/30RQ - 30RBY/30RQY
Troubleshooting
E N G L I S H
There follows a list of failures which might occur and their possible
causes and repairs.
In case the unit is not working properly, disconnect it from the mains
before trying to repair it.
Oil leak from the compressor:
- Leaks from the refrigerant circuit;
FIND AND REPAIR LEAKS.
Water leaks:
Defect
Possible Cause
The unit does not start:
- Power supply disconnected;
CONNECT POWER SUPPLY.
- Main switch is cut-out;
CUT-IN THE MAIN SWITCH.
- Supply voltage too low;
CHECK SUPPLY VOLTAGE.
- Triggering of a protection device;
RESET THE PROTECTION DEVICE.
- Blocked contactor;
SUGGESTED REPAIR
- Defects at inlet and/or outlet water connections;
CHECK AND TIGHTEN CONNECTIONS IF NECESSARY.
The defrost system of the unit is not working (only on units 30RQ):
- Failure of 4-way backflow valve;
CHECK AND REPLACE VALVE IF NECESSARY.
- Defrost probe is not working;
CHECK AND REPLACE PROBE IF NECESSARY.
CHECK AND REPLACE THE BLOCKED CONTACTOR IF NECESSARY.
- Seizing of compressor;
CHECK AND REPLACE COMPRESSOR IF NECESSARY.
- Loose electric connections;
CHECK AND TIGHTEN THE ELECTRIC CONNECTIONS.
The unit works continuously or cycles too often:
- Failure of compressor contactor;
CHECK AND REPLACE CONTACTOR IF NECESSARY.
- Compressor failure;
CHECK AND REPLACE COMPRESSOR IF NECESSARY.
- Refrigerant leak;
CHECK THE CHARGE AND ADD MORE REFRIGERANT.
- Water flow is insufficient;
CHECK PRESSURE LOSS IN THE WATER CIRCUIT.
- Static pressure in water circuit is insufficient;
CHECK IT ON THE PRESSURE GAUGE AND RESTORE IT IF NECESSARY.
The unit stops because of low pressure alarm:
- Refrigerant leak;
CHECK THE CHARGE AND ADD MORE REFRIGERANT.
- Water flow in the heat exchanger is insufficient;
CHECK THE WATER PUMP.
- Unit starting delay;
WAI T UNTIL THE SYSTEM IS STABLE.
The unit stops because of high pressure alarm:
- Failure of high pressure switch;
CHECK AND REPLACE PRESSURE SWI TCH IF NECESSARY.
- The expansion valve is blocked;
CHECK AND REPLACE THE EXPANSION VALVE IF NECESSARY.
- Dehydrating filter clogged;
CHECK AND REPLACE FILTER IF NECESSARY.
- Outdoor fan/s not working;
CHECK THE FANS/S MOTOR/S AND ITS ELECTRIC CONNECTIONS.
- Coil clogged or dirty;
REMOVE CLOGGING OR CLEAN THE COIL.
The unit is too noisy:
- Piping vibration;
FIX THE PIPES PROPERLY.
- The compressor is too noisy;
CHECK AND REPLACE COMPRESSOR IF NECESSARY.
- The expansion valve blows;
CHECK THE CHARGE AND ADD REFRIGERANT IF NECESSARY.
- Panels are not installed correctly;
INSTALL THE PANELS PROPERLY.
GB - 23
L010128H68 - 0214
www.eurovent-certification.com
www.certiflash.com
Manufacturer: Carrier SCS, Montluel, France
The manufacturer reserves the right to change any product specifications without notice.
Order No: L010128H68, 03.2014. Supersedes order No: L010128H68, 06.2011.
Printed in the European Union