Hitecsa ECVBZ, CCVBZ, ECVZ, CCVZ, ACVBZ Installation, Operation And Maintenance Instructions

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Page 1

IOM 3.2 / HE OCT 2002

HITECSA

ISO 9002

EN29002

UNE66902

VERTICAL AIR COOLED AIR CONDITIONERS

& AIR TO AIR HEAT PUMPS

Self Contained (ACVZ, ACVBZ series)

& Split Systems (CCVZ/ECVZ, CCVBZ/ECVBZ series)

Installation, operation

and maintenance instructions

Self Contained ACVZ 351 401 501 701 721 751 801 1001 1002 1201 1402 1502 2002 2302 2402 Split, outdoor sectio CCVZ 351 401 501 701 721 751 801 1001 1002 1201 1402 1502 2002 2302 2402 Split, indoor section ECVZ 351 401 501 701 721 751 801 1001 1002 1201 1402 1502 2002 2302 2402

Nominal cooling capacity kW

10,0 11,5 14,9 18.7 19,5 22,2 23,4 30,0 29,8 36,0 37,4 44,4 60,0 67,0 72,0

Self Containe ACVBZ 351 401 501 701 721 751 801 1001 1201 1402 1502 1602 2002 2302 2402 Split, outdoor section CCVBZ 351 401 501 701 721 751 801 1001 1201 1402 1502 1602 2002 2302 2402 Split, indoor sectio ECVBZ 351 401 501 701 721 751 801 1001 1201 1402 1502 1602 2002 2302 2402

Nominal cooling capacity kW

9,8 11,5 14,7 18.6 19,4 22,1 23,2 29,7 35,0 37,2 44,2 46,4 59,4 66,0 70,0

Nominal heating capacity kW

10,4 12,7 15,6 19.6 20,6 23,5 24,4 31,7 37,0 39,2 46,6 48,8 63,4 70,0 74,0

COOLI NG MODELS

HEAT PUMP MODELS

Page 2

ELECTRICAL DATA

+ Models 230/3/50 are available on special request.

++ D-Direct; B-Belt drive.

+++ V- Expansion Valve.

(*) Based on an outdoor air dry bulb temperature of 35ºC and an indoor air wet bulb

temperature of 19ºC.

(**) Based on an outdoor air dry bulb temperature of 46ºC and an indoor air wet bulb

temperature of 21ºC.

MODEL ACVZ NOMINAL POWER INPUT kW * NOMINAL CURRENT A MAXIMUM POWER INPUT kW ** MAXIMUM CURRENT A UNIT STARTING AMPS A

351 401 501 701 721 751 801 1001 1002 1201 1402 1502 2002 2302 2402

4,7 5,2 6,4 7,0 8,8 9,4 10,2 12,4 12,7 17,3 14,0 18,4 25,9 27,4 32,9 8,0 8,8 10,9 11,9 14,9 16,0 17,3 21,1 21,6 29,4 23,9 31,2 44,0 46,5 56,0 5,6 6,2 7,6 8,4 10,5 11,2 12,2 14,8 15,2 20,6 16,8 22,0 30,9 32,6 39,3 9,6 10,5 13,0 14,2 17,8 19,1 20,7 25,2 25,8 35,1 28,5 37,3 52,5 55,4 66,8

46 50 56 82 100 101 94 122 63 154 91 114 144 170 170

MODEL ACVZ

Unit Operating Weight kg Refrigerant Charge kg Control Circuit Voltage V

OUTDOOR SECTION CCVZ

Operating Weigh t kg COMPRESSOR Type Quantity

Face Area sq.m Rows Fins / meter FAN Quantity

Nominal Air Flow l/s Transmission ++ MOTOR Voltage Nominal HP

INDOOR S ECTION ECVZ

Operating Weigh t kg COIL

Face Area m

Rows Fins / meter FAN Quantity

Power supply +

COIL

Nominal Air Flow l/s Transmission ++ MOTOR Voltage Nominal HP Expansion System +++ AIR FILTER Quantity Thickness mm Width ea. mm Height ea. mm.

Model

351 401 501 701 721 751 801 1001 1002 1201 1402 1502 2002 2302 2402

235 254 282 344 360 372 380 485 555 495 564 620 895 904 920

2,5 3,0 3,6 4,7 5,1 5,7 5,9 6,0 2x3,6 8,2 2x4,7 2x4,8 2x7,8 2x8,6 2x9,0

165 172 215 225 235 250 253 350 345 360 488 506 591 616 616

111111112122222

0,360 0,400 0,450 0,720 0,720 0,720 0,720 1,260 1,260 1,260 1,260 1,260 1,757 1,757 1,757

455445533555666

111111122222222

10/10 12/12 12/12 15/15 15/15 15/15 15/15 15/11 15/11 15/11 15/11 15/11 18/18 18/18 18/18

DD SS SS SS SS SS SS G2L G2L G2L G2L G2L G2L G2L G2L

944 1055 1222 2111 2111 2277 2333 3111 3472 3472 3472 3888 5000 5000 5277

DBBBBBBBBBBBBBB

230/1

1/3 3/4 1,0 1,5 1,5 2,0 2,0 2,0 2,0 3,0 3,0 4,0 5,5 5,5 5,5

85 89 95 126 126 133 133 160 210 170 266 268 304 304 304

0,252 0,310 0,350 0,540 0,540 0,540 0,540 0,840 0,840 0,840 0,840 0,840 1,202 1,202 1,202

444444433444555

476 555

111111122222222

400/3/50

Reciprocating

3/8"Copper tubes/aluminum fins

555 476

Reciprocating Scroll Reciprocating Scroll

Double Suction Centrifugal

400/3

3/8" Copper tubes/aluminum fins

476

Double Suction Centrifugal

10/10 10/10 10/10 12/12 12/12 12/12 12/12 12/12 12/12 12/12 12/12 12/12 15/11 15/11 15/11

DD DD SS SS SS SS SS G2L G2L G2L G2L G2L G2L G2L G2L

639 667 944 1167 1222 1333 1444 1944 1944 2222 2278 2444 3111 3333 3444

DDBBBBBBBBBBBBB

1/3 1/3 3/4 1,0 1,0 1,5 1,5 1,5 1,5 2,0 2,0 2,0 4,0 4,0 4,0

R R R V V V V V V(2) V V(2) V(2) V(2) V(2) V(2)

111222233333333

650 650 730 486 486 486 500 500 500 500 500 500 633 633 633 528 528 528 587 587 587 587 590 590 590 590 590 635 635 635

400/3

PHYSICAL AND ELECTRICAL DATA

COOLING MODELS

Page 3

ELECTRICAL DATA

+ Models 230/3/50 are available on special request.

++ D-Direct; B-Belt drive.

+++ V- Expansion valve; C- Capillary tubes; R- Restrictor.

(*) Based on an outdoor air dry bulb temperature of 35ºC and an indoor air wet bulb temperature of 19ºC.

(**) Based on an outdoor air wet bulb temperature of 6ºC and an indoor air dry bulb temperature of 20ºC.

(***) Based on an outdoor air dry bulb temperature of 46ºC and an indoor air wet bulb temperature of 21ºC.

(****) Based on an outdoor air wet bulb temperature of 18ºC.

MODEL ACVBZ NOMINAL POWER INPUT kW

COOLING *

HEATING**

NOMINAL CURRENT A

COOLING *

HEATING**

MAXIMUM POWER INPUT kW

COOLING ***

HEATING****

MAXIMUM CURRENT A

COOLING ***

HEATING****

UNIT STARTING AMPS A

351 401 501 701 721 751 801 1001 1201 1402 1502 1602 2002 2302 2402

4,7 5,2 6,4 7,0 8,8 9,4 10,2 12,4 17,3 14,0 18,3 22,6 25,9 27,4 32,9 3,9 4,3 5,5 6,7 7,7 8,8 9,1 11,4 12,6 13,3 17,3 19,8 23,7 26,2 26,7

8,0 8,8 10,9 11,9 14,9 16,0 17,3 21,1 29,4 23,9 31,1 38,5 44,0 46,5 56,0 6,7 7,3 9,4 11,4 13,1 14,9 15,5 19,3 21,4 22,5 29,4 33,6 40,3 44,5 45,3

5,6 6,2 7,6 8,4 10,5 11,2 12,2 14,8 20,6 16,8 22,0 27,0 30,9 32,7 39,3 4,6 5,0 6,5 7,9 9,1 10,4 10,7 13,4 15,1 15,6 20,4 23,3 27,9 30,8 31,5

9,6 10,5 13,0 14,2 17,8 19,1 20,7 25,2 35,1 28,5 37,3 45,9 52,5 55,6 66,8 7,9 8,6 11,1 13,4 15,4 17,6 18,3 22,8 25,7 26,5 34,6 39,6 47,4 52,4 53,5

44 48 54 82 98 100 93 121 151 86 109 103 136 170 168

MODEL ACVBZ

Powe r supply + Unit Operating Weight kg Refriger ant Charge kg Control Circuit Voltage V

OUTDOOR SECTION CCVBZ

Voltage Operating Weight kg COMPRESSOR Type Quantity COIL

Face Ar ea

Rows Fins / meter FAN

Nominal Air Flow l/s Transmission ++ MOTORS Voltage Nominal HP Expansion System +++

INDOOR SECTION ECVBZ

Operating Weight kg COIL

Face Ar ea

Rows Fins / meter FAN

MODEL

Nomi nal A ir Flo w l/s Transmission ++ MOTORS Voltage Nomi nal H P Expansion System +++ AIR FLITER Quantity Thickness mm Width ea. mm Height ea. mm

MODEL

10/10 10/10 10/10 12/12 12/12 12/12 12/12 12/12 12/12 12/12 12/12 12/12 15/11 15/11 15/11

DD SS SS SS SS SS SS G2L G2L G2L G 2L G2L G2L G 2L G2L 639 778 944 1167 1222 1333 1444 2000 2222 2333 2555 2666 3111 3333 3555

DBBBBBBB B B B B B B B

1/3 3/4 3/4 1,0 1,0 1,5 1,5 1,5 2,0 2,0 3,0 3,0 4,0 4,0 4,0

RRRVVVVV VV(2)V(2)V(2)V(2)V(2)V(2)

1112222 2 2 3 3 3 4 4 4

650 650 730 486 486 486 486 647 722 500 500 500 633 633 633 528 528 528 587 587 587 587 610 610 590 590 590 635 635 635

400/3

351 401 501 701 721 751 801 1001 1201 1402 1502 1602 2002 2302 2402

251 276 290 367 392 423 440 553 585 730 810 820 1080 1115 1135

3,0 3,2 3,8 5,2 5,9 6,7 6,7 7,6 8,1 2x5,8 2x6,7 2x6,7 2x7,0 2x8,3 2x8,3

172 189 200 253 272 297 304 373 397 477 538 548 747 782 802

1111111 1 1 2 2 2 2 2 2

0,360 0,400 0,450 0,720 0,720 0,720 0,720 1,125 1,260 1,440 1,440 1,440 2,200 2,200 2,200

4554455 4 5 4 5 5 5 5 5

10/10 12/12 12/12 15/15 15/15 15/15 15/15 15/11 15/11 15/15 15/15 15/15 18/18 18/18 18/18

DD SS SS SS SS SS SS G2L G2L (2) SS (2) SS (2) SS (2) SS (2) SS (2) SS 944 1055 1222 2111 2111 2278 2333 3111 3472 3777 4333 4444 6111 6111 6528

DBBBBBBB B B B B B B B

0,6 3/4 1,0 1,5 1,5 2,0 2,0 2,0 3,0 2x1,5 2x2 2x2 2x3 2x4 2x4

RRR

92 95 99 126 126 136 136 197 199 253 272 272 333 333 333

0,252 0,310 0,350 0,540 0,540 0,540 0,540 0,750 0,840 0,840 1,050 1,050 1,600 1,610 1,610

400/3/50

400-3-50

Reciprocating

3/8"COPPER TUBES/ALUMINUM FINS

555 476

Reciprocating Scroll Reciprocating Scroll

DOUBLE SUCTION CENTRIFUGAL

400/3

3/8 COPPER TUBES / ALUMINUM FINS

476

DOUBLE SUCTION CENTRIFUGAL

PHYSICAL AND ELECTRICAL DATA

HEAT PUMP MODELS

Page 4

GENERAL

This manual reviews general rules which must be respected during the installation and maintenance of air conditioning systems.

Before starting the system installation read this whole manual. Also please refer to the technical manual and to the model being installed for more details about its characteristics and accessories.

SAFETY PRECAUTIONS

Installation and maintenance of air conditioning equipment can be dangerous because the system is under pressure and includes electrical components.

Only qualified and trained service technicians should be permitted to proceed with the installation, start up and provide maintenance and service for this equipment.

Untrained personnel can perform only basic operations such as cleaning of air filters.

All other operations have to be made by qualified and technically trained personnel.

During every visit follow recommendations contained in this manual, on stickers on the unit, and take general safety precautions.

Strictly follows all safety codes. Use safety glasses and work gloves.

Use a quenching cloth for brazing and unbrazing operations.

WARNING:

- Before starting service or maintenance, turn off the main power switch to avoid electrical shock and injury.

- When repairing the unit, use original spare parts and install them in the same place as the old parts.

- During the system operation, some elements of refrigeration cycle can reach temperatures above 70°C and for this reason only qualified and trained technicians should have access to the units components.

- Never install the units in explosive atmosphere.

EQUIPMENT RECEPTION

1. Inspect the packing. Inspect the unit. If it is damaged, or if the shipment is incomplete, immediately file a claim with the shipping company.

2. Check that the local power supply agrees with the specification on the unit nameplate.

INSTALLATION LOCATION

Check the following points:

1. The construction must be able to support the unit operating weight.

2. Allow sufficient space for servicing and air flow access around the outdoor units.

3. Select a location free of dust or foreign matter which may cause coils clogging.

4. When the outdoor unit is installed on the ground, be sure to choose a location which cannot be flooded. It is important to ensure at all time water evacuation out of the unit (rain water, condensation water and water from coil defrost in the case of heat pump system).

5. Consult and respect all regulations concerning installation of air conditioning equipment.

6. Vibration isolators pads should be provided to prevent noise transmission.

UNIT SUPPORT

Due to the size and the weight of air conditioning units their base frame requires a support which should meet the following conditions:

1. Support surface has to be large enough to distribute unit weight on the building construction.

2. When the unit base has fixation holes they should be used to keep it firmly fastened to the support.

3. The structure should support the units operational weight.

CONDENSATE AND RAIN

WATER EVACUATION

CONDENSING UNITS: Units with centrifugal fans, heat pump models, have a drain tube connection to remove condensate and defrost water.

INDOOR UNITS: They have a drain pan to collect condensation water with drain tube connection.

DRAIN TUBE:

1. Use only galvanized steel, copper or plastic tube. Do not use garden hose.

2. It is necessary to provide a flexible connection in the drain piping to eliminate possible vibrations.

Fig. 1 - Exemple of the trap to be made by the installer.

Page 5

ATTENTION: To avoid electrical shock, injury or equipment damage, be sure that the ON-OFF power switch is in OFF position. Field wiring must comply with all local regulations and codes. Special attention has to be made when making earth connections.

Supply voltage and the current has to be within 10% of values indicated on the unit nameplate. If supply is incorrect contact local power company.

Never operate a unit if the voltage unbalance exceeds 3%. The following formula must be used to determine the percentage of voltage unbalance:

voltage unbalance % = largest deviation from average voltage / average voltage.

EXAMPLE:

Nominal supply: 400.3.50 Measured voltage:

XY = 407V, YZ = 396V, ZX = 391V Average voltage: (407+396+391)/3 = 398 V

Determine maximum deviation from average voltage:

XY: 407-398 = 9V (= maximum deviation) YZ: 398-396 = 2V ZX: 398-391 = 7V Percentage voltage unbalance: (9/398)x100 =

2.26%, <3%, therefore acceptable unbalance.

THERMOSTAT CONNECTION: Connection between the thermostat and the unit should be made using flexible tube and to be in accordance with the unit wiring diagram.

ATTENTION: If the unit operates at another voltage from the specified it will loose the warranty.

ATTENTION: Compressors are mounted on antivibration isolators. Do not remove fixing screws.

3. Provide a trap properly sized for correct water evacuation (see Fig. 1).

4. Drain piping should be located below the drain connection and should have inclination to assure proper water flow.

AIR DUCTS

Ducts should be sized taking in consideration nominal air flow and external static pressure of the unit.

1. Regardless of the type of the air ducts used they cannot be flammable and cannot produce toxic gases in the case of fire. They should have smooth inside surface and not contaminate the air passing through them. It is advisable to use sheet metal ducts with thermal insulation to avoid condensation on the ducts and excessive loss of energy.

2. Connect air ducts to the unit using flexible connections so as to absorb vibrations, avoid noise transmission and make easy unit access.

3. If possible avoid installing duct elbows close to the air outlet of the unit. If it is necessary use large radius elbows and inside air deflectors if duct size is large enough.

NOTE: All duct design has to be made by technicians experienced in this matter.

ELECTRICAL

CONNECTIONS

IMPORTANT: In order to be sure that unit power supply is correct (wire entry, wires cross section, protection devices, etc..) consult electrical data table, the wiring diagram attached to the unit and check local standards concerning the installation of air conditioning equipment.

Page 6

Min. 3.4 m

RIGGING

Min. 3.4 m

Min. 2 m

Outdoor section

Indoor section

1. Use spreaders to prevent damage to the panels and coils.

2. Avoid violent movements of the unit.

3. Never tip or roll the unit more than 15º.

4. Check if all panels are in correct location and are firmly fastened with the screws.

Self contained unit

Page 7

RECOMMENDED SERVICE SPACE (mm)

WEIGHT DISTRIBUTION

1300

1000

500

1000

700

Self-contained units Outdoor units

MODEL 1 2 3 4

351 63 88 38 63

401 69 97 41 69

501 73 102 44 73

701 92 128 55 92

721 98 137 59 98

751 106 148 63 106

801 110 154 66 110

1001 166 166 111 111

1201 176 176 117 117

1402 219 219 146 146

1502 246 246 164 164

1602 243 243 162 162

2002 335 335 223 223

2302 341 341 227 227

2402 341 341 227 227

1 2

3 4

WEIGHT DISTRIBUTION (kg)

MODEL 1 2 3 4

351 43 60 26 43

401 47 66 28 47

501 50 70 30 50

701 63 89 38 63

721 68 95 41 68

751 74 104 45 74

801 76 106 46 76

1001 112 112 75 75

1201 119 119 79 79

1402 146 146 97 97

1502 171 171 114 114

1602 169 169 113 113

2002 237 237 158 158

2302 242 242 161 161

2402 242 242 161 161

3002 283 283 188 188

Page 8

SPLIT SYSTEMS VERSION

REFRIGERANT LINES

CONNECTIONS AND

REFRIGERANT CHARGE

Units are shipped from the factory with nitrogen charge and soldered piping connections. Piping connections should be made by qualified installer.

IMPORTANT To connect outdoor with indoor unit always use degreased and deoxidized copper refrigerant grade tubes.

When making refrigerant pipes connections it is necessary to respect the following:

- Avoid small radius curves.

- Take away the nitrogen holding charge from the refrigerant circuit.

- Select the diameter of the copper tubing taking in consideration the distance between the indoor and outdoor units and the unit type.

- For soldering, use silver alloy rod and be sure that it is done in a nitrogen atmosphere.

- Insulate the refrigerant lines to avoid damage and oxydation.

- Pull a vacuum in the refrigerant circuit till obtaining a pressure of 0.7 mm water gauge (6.9 Pa) and maintain it for at least 2 hours.

- Charge the refrigerant circuit with the necessary amount of refrigerant. Refrigerant charge indicated in the technical manual is sufficient for the outdoor and indoor units, you have to add the refrigerant quantity needed for the piping, using table 1 in accordance with the piping length and diameter.

- Check for refrigerant leaks.

ATTENTION For correct unit performance and longevity never under or overcharge refrigerant.

IMPORTANT

- Never use a compressor as a vacuum pump.

- Liquid refrigerant must never be introduced into the suction line.

REFRIGERANT LINES SELECTION

When designing refrigerant lines you have to consider different piping arrangements:

LAYOUT ACCORDING TO FIGURE 2

Suction / discharge line - Vertical run

- A trap at the base of the vertical pipe run and in-

termediate traps every 8 meters.

- Suction line, vertical run: gas velocity should be more than 6 m/s.

LAYOUT ACCORDING TO FIGURE 3

Indoor

unit

Outdoor

unit

Heat pump Heat pump (discharge line)

Liquid line Gas line

Cooling Cooling (suction line)

Fig. 3 - Outdoor unit is below the indoor unit.

Heat pump Heat pump

(discharge line)

Gas line Liquid line

Cooling Cooling

(suction line)

Fig. 2 - Outdoor unit is installed above the indoor unit.

Outdoor

unit

Indoor

unit

Table 1:ADDITIONAL REFRIGERANT CHARGE (g/m)

Diameter 1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8" 1-1/8" 1-3/8" 1-5/8"

Liquid line 15 25 40 75 120 180 250 420 645 965 Suction line - - 6 14 23 34 47 81 123 185

Page 9

Nominal cooling capacity (kW) of one circuit

Pressure drop per 10 m. of equivalent length

Suction / discharge line. Vertical pipe run - Fig. 3

- For heat pump systems use a trap

at the base of the vertical pipe run.

- There is no need for intermediate trap.

- For cooling only systems traps are not required.

- For heat pump systems keep velocity in the vertical run of suction or discharge line more than 6 m/s.

For both options the following conditions should be observed:

- The maximum allowable speed in all gas lines is 15 m/s.

- The suction line must have insulation and a slope of 1-2% toward the compressor in the horizontal pipe run.

- For long piping run it may be necessary to adjust oil charge (see table

2). For each trap and for 10 m. of pipe above 20 m. add oil.

- In the case of downward liquid flow with a height exceeding 10 m. it is necessary to install a manual pressure equalization valve.

- Keep liquid subcooling at least 1°C at the restrictor inlet. If the liquid line has upward flow and pipe length exceeding 15 m., for each 3.5 m. above this value provide 1°C subcooling. In the cooling systems subcooling can be obtained by the contact of liquid and suction line (on a max. length of 15 m.) creating the heat exchange.

- For every meter of piping installed add refrigerant according with the table 1.

Graph 1 - Suction line

Nominal cooling capacity (kW) of one circuit

Diameter

Speed m/s

Pressure drop per 10 m. of equivalent length

Graph 2 - Discharge line

Speed m/s

Diameter

Table 2: ADDITIONAL OIL CHARGE

Diam. 3/8" 1/2" 5/8" 3/4" 7/8" 1-1/8" 1-3/8" 1-5/8"

cm³/10m 1.5 3 5 9 16 35 54 80

Page 10

LINE DIAMETER

DIAMETER OF GAS LINES

In the cooling operation suction line hold gas refrigerant and in the heat pump operation discharge line is also gas line. Line diameter is selected in the most unfavourable conditions. It is necessary to check for both cases.

In the case of the layout shown on figure 2 the suction line velocity will produce the worse conditions and gas line diameter selection is for suction line. It is necessary to check also the discharge line. The suction and discharge calculations are done in the same way using graphs 1 and 2 where pressure are referred to 10 meters of equivalent length for each diameter.

For larger or smaller equivalent lengths pressure drop is obtained in the direct proportion. The line total pressure drop (horizontal plus vertical pipe runs) must never be higher than 20 kPa.

DIAMETER OF LIQUID LINES

To determine the liquid line diameter use graph 3, the pressure drop in this line should be below 68 kPa.

Nominal cooling capacity (kW) of one circuit

Pressure drop per 10 m. of equivalent length

Diameter

Graph 3 - Liquid line.

START UP

PRELIMINARY CHECK UP

It is very important to check the following points before first unit start up:

1. All the electrical connections are well tight.

2. Unit is level installed and has proper supporting structure.

3. Air ducts have been not damaged during the installation.

4. Air filters are correctly mounted and are clean.

5. All panels are at their place and the screws tights.

6. Unit has easy maintenance and service access.

7. Openings and/or drain connections for rain and defrost (heat pumps) water evacuation are not blocked.

8. Check if there are no refrigerant leaks.

9. Electrical power source agrees with the unit nameplate rating.

10. Check for proper fan rotation.

ATTENTION: The compressors are mounted on vibration isolators. Check if mounting bolts have been not loosen or removed by mistake.

UNIT START UP

Start up must be performed by qualified and trained service personnel.

ATTENTION, CRANKCASE HEATER: to avoid refrigerant condensation in the compressor(s) and refrigerant absorbtion in oil when not operating, compressors are fitted with a crankcase heater. This electrical resistance is connected on normally closed contacts from the compressor(s) contactor(s), thus when main power of the unit is live the heating is effective only when the conpressor(s) is(are) not running. Make sure that this heating element is under power for at least 24 hours before the first start up of the compressor (thermostat on "OFF" position).

At start up time a check list of all parameters must be established. Consult, and eventually modify, this check list when servicing the unit and for maintenance operations.

Page 11

DEFROST (Heat pump systems)

At low outdoor temperature during heating cycle and depending on air humidity, frost will appear on the outdoor coil. It is necessary to remove the ice for proper continuation of the heating cycle. This is done automatically with a device, operating in function of time and temperature of the surface of the heat exchanger,

producing defrost by hot gas injection.

During this cycle, the auxiliary electrical heating coil (option) is connected to compensate for heating. For units with two compressors, the automatic defrost is independent for each refrigeration circuit.

FANS

When static pressure and air flow requirements differ from nominal ratings, centrifugal fan speed can be adjusted to obtain specific air flow and static pressure. Consult fan curves shown in the technical manual.

For proper and reliable operation of the system, air flow should within ± 10% of the nominal air flow indicated on the fan curves.

To change fan speed: 1- Slide the motor along it's track to remove the transmission belt. 2- Loose the motor pulley set screws 2 and rotate pulley flanges as necessary. 3- Tighten set screws 2. 4- Replace transmission belt(s) in the pulley channel. 5- If needed, tighten the belt(s) using tension screw nut and washer 6. Refer to Fig. 4.

1- Motor support 5- Transmission belt 2- Motor pulley 6- Tensor screw 3- Set screw 7- Fan pulley 4- Motor 8- Fan scroll

Fig. 4 - Fan speed adjustment

1- Fixed flange 2- Set screw 3- Movable flange 4- Ruler straight edge must be parallel with the belt. 5 + 7- Motor and fan shafts has to be parallel 6- Pulleys

In order to align motor and fan pulleys: 1- Loose fan pulley set screw, slide it along the pulley shaft and align with the motor pulley using a ruler to check that is in parallel position to transmission belt (see Fig. 5). 2- Tighten fan pulley screws.

Fig. 5 - To align motor and fan pulleys.

Page 12

MAINTENANCE

It is advisable to make maintenance visits every 1000 hours of the system operation, or every cooling season.

During every visit check the following

DRAIN: If drain pan is clean, water drain is not obstructed, and water can flow from the drain pan, drain pipe and the trap.

AIR FILTERS: Clean the filters after 4 hours of system operation and every 3 months, or more often depending on the application. Clean filters elements by immersing in warm water detergent solution, rinse with clean water and carefully dry before installing them in their place.

CENTRIFUGAL FANS: Check and adjust belt transmission every 15 days during the first month from the start up and later every 1000 hours. Motor and fan have self lubricating bearings and do not need additional lubrication.

REFRIGERATION CIRCUIT: Check for refrigerant and oil leaks in the system, or for vibrations and compressor unusual noises. Take note of operating pressures.

When the system is running and that symptoms of refrigerant charge loss are detected (abnormal low cooling capacity or low pressure pressostat tripping), it is

necessary to make a leak test. If result is not satisfactory follow with gas tightness test using compressed nitrogen. It has to be performed by an experienced service technician. First all refrigerant must be removed from the circuit and stored in a tank.

IMPORTANT: Never use the compressor as a vacuum pump. If more refrigerant is needed add gas very slowly via the suction line. Liquid refrigerant must never be introduced into the suction line. Fill in the refrigerant charge indicated in the nameplate, plus the required charge for the refrigerant lines, if the system is a split system.

ELECTRICAL CIRCUIT: Make sure that there are no faulty terminals or contactors, etc..

Be sure that all electrical connections are properly tightened. Take measurements of the tension and amperage of each phase and check if they are within operation limits of the unit. Check the operation of all the relays, high and low pressure pressostat, etc..

When unit has scroll compressors check if phases sequence safety relay is working properly.

CONDENSER COILS: Once a year clean condenser coils (use water detergent solution, dry with air at the pressure of around 6 bars). Never use for coil cleaning the wire brush.

ATTENTION

Never switch off or disconnect the power supply of the compressors crankcase heaters.

If, for any reason it is necessary to shut down the complete installation, first stop the compressors operation by selecting the "OFF" position on the thermostat, then disconnect the main power supply.

After a shut down period of some days it is mandatory to energise the crankcase heater for a period of at least 24 hours before new compressor start up.

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REMOTE CONTROL OPERATION

CONTROL SYSTEM

The unit is controlled from a remote room thermostat. Type of thermostat is indicated in the following table:

RTR 7007 and RTR 7035

CONTROL BUTTONS

c ON/OFF SWITCH

d TEMPERATURE SELECTOR

e FAN OPERATING MODE SELECTOR: fan oper-

ate only when system is operating in cooling or heating, or continuous fan operation.

f COOLING AND HEATING MODE SELECTOR: thermostat is controlling room temperature when the system is operating in cooling or heating mode.

USER'S SETTING POSSIBILITIES

STARTING UP THE SYSTEM - Displace the ON/OFF selector c to position "I".

COOLING - Select "COOL" position with selector f. Adjust required room temperature with knob d. If this temperature is below the effective room temperature the compressor will operate after a time delay.

HEATING - Select "HEAT." position with selector f. Adjust required room temperature with knob d. Cooling systems with auxiliary heater: If this temperature is above the effective room temperature the contactor will energize the heating element. Heat pump systems: If this temperature is above the effective room temperature the compressor will operate after a time delay. Auxiliary heater is controlled by the outdoor thermostat.

FAN - Select fan operating mode with switch e: "AUTO" (fan activated when the system is operating in cooling or heating mode) or continuous "CONT." (not depend- ant on system compressor operation).

SWITCHING DOWN THE SYSTEM - Displace the ON/ OFF selector c to position "0".

DSL-450, DSL-600 and DSL-700

Includes the following functions:

• Selector mode: "Cooling", "Heating", "Automatic" and "Off".

• An electronic thermostat is controlling the room temperature in cooling and heating modes.

• An indoor fan operating mode selector.

• Two different room temperature settings.

• Optional room temperature remote sensor which allow to locate the thermostat in a distant area (by example outside the air conditioned space).

• The operating mode and selected temperature may be locked to prevent tampering.

• Indoor temperature display.

• The selected setpoints are unaffected by power failures of any duration.

CONTROL BUTTONS

4 1 2

5 6

MODEL THERMOSTAT TYPE

ACV/CCV 351-501

RTR 7007

1 stage cooling / 1 stage heating

ACV/CCV 701-3502

DSL-700

2 stages cooling / 2 stages heating (auxiliary electric heating)

ACVB/CCVB 351-501

RTR 7035

1 stage cooling / 1 stage heating *

ACVB/CCVB 701-1201

DSL-450

1 stage cooling / 2 stages heating (heat pump and auxiliary electric heater)

ACVB/CCVB 1402-3502

DSL-600

2 stage cooling / 3 stages heating (heat pump and auxiliary electric heater)

* Heat pump units ACVB/CCVB 351 to 501 are delivered with an outdoor thermostat controlling (if supplied) the optional auxiliary electric heater contactor.

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c OPERATING MODE SELECTION:

Cooling Heating

Automatic OFF Disables controller

d FAN OPERATION

Show continuous fan operation.

e OUTDOOR TEMPERATURE DISPLAY (With optional sensor).

f DAY/NIGHT BUTTON

Day temperature, Night temperature.

g LOWER and h RAISE the setpoints.

USER'S SETTING POSSIBILITIES

COOLING - Select the mode with button c, cooling symbol is blinking. Adjust the temperature with buttons g and h. Temperature setpoint display will blink for 5 seconds. If this temperature is below the effective room temperature the compressor will start after a time delay (or for two compressors models, if necessary the second compressor will be energized after the first one).

HEATING - Select the mode with button c, heating symbol is blinking. Adjust the temperature with buttons g and h. Temperature setpoint display will blink for 5 seconds. Cooling systems with auxiliary heater: If this temperature is above the effective room temperature the contactor will energize the heating element. Then, if necessary the second stage is also energized.

Heat pump systems: If this temperature is above the effective room temperature the compressor will operate after a time delay (or for two compressors models, if necessary the second compressor will be energized after the first one). If necessary, as a second step (one compressor models) or third step (two compressors models) the auxiliary heater (electric or hot water) is activated.

AUTO CHANGEOVER MODE - The thermostat will automatically switch from cooling or heating mode based on the temperature established for both modes.

FAN - Button d will select the automatic mode (fan will operate when the system is activated in cooling or heating mode) or continuous (not depending on the system operation).

OFF MODE - To turn off the cooling or heating system press the button c until the word "OFF" appears on the LCD. Fan operation is still possible in this mode.

OUTDOOR TEMPERATURE - If an outdoor remote sensor has been installed, outdoor temperature can be displayed by pressing the button e.

DAY/NIGHT BUTTON - By pressing the button f it is possible to select a second (alternate or night) setting temperature. The thermostat can be alternated between the two temperatures setpoints manually or automatically, using any relay-based controller or clock timer (not supplied).

CELSIUS / FAHRENHEIT - Simultaneously press g and h to switch between Celsius (°C) and Fahrenheit (°F) display.

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START-UP CHECK LIST

Equipment sold by: ................................................... Start-up date: ...........................................................

Installed by: ..............................................................

Site address: ...........................................................................................................................................................

Equipment type and serial number: ......................................................................................................................

ELECTRICAL DATA

Supply voltage Ph 1: ..................... Volts Ph 2: ..................... Volts Ph 3: ..................... Volts

Nominal voltage: ......................................... Volts % network voltage: ...........................

Currant draw: Ph 1: ..................... A Ph 2: ..................... A Ph 3: ..................... A

Control circuit voltage: ............................... Volts Control circuit fuses: .................................................. A

Main circuit breaker rating: ...................................................................................................................................

PHYSICAL DATA

CONDENSER EVAPORATOR

Entering air temperature: .............................. °C Entering air temperature: .............................. °C

Leaving air temperature: ............................... °C Leaving air temperature: ............................... °C

Pressure drop (air): ........................................ Pa Pressure drop (air): ......................................... Pa

Discharge air pressure: .................................. Pa Discharge air pressure: ................................... Pa

Fan motor input: Fan motor input:

1: ....... A 2: ....... A 3: ....... A 4: ....... A Ph. 1: ....... A Ph. 2: ....... A Ph. 3: ....... A

SAFETY DEVICE SETTINGS - CIRCUIT 1 / CIRCUIT 2 (for 2 circuits models)

High pressure switch Cut-out: ................/............... kPa Cut-in: ................/............... kPa

Low pressure switch Cut-out: ................/............... kPa Cut-in: ................/............... kPa

Oil level: ................................................................................./................................................................................

Oil visible in sight glass ?: .................................................................../...................................................................

ACCESSORIES • Low ambient kit

• Electric heating - kW: .................................................................................

• Hot water heating: ......................................................................................

Commissioning engineer (name): ..........................................................................................................................

Customer signature: Name: ...............................................

Date: .................................................

Remarks: ............................................................................................................................................................

............................................................................................................................................................

Note: Complete this start-up list at the time of installation.

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Subject to change without notice.