Technibel PMHRV Series, PMHRV 2050, PMHRV 2064, PMHRV 2044, PMHRV 2072 Technical Instructions

1

TECHNICAL INSTRUCTIONS

May 2005 10 12 133 - GB - 04

PMHRV

AIR COOLED WATER CHILLER HEAT PUMP

40 to 67 kW

PMHRV 2044
PMHRV 2050
PMHRV 2064
PMHRV 2072

CMHGV cooling only model also available

2

APPLIANCES FILLED WITH R 407 C

R 407 C

• Fluid R 407 C, as opposed to R22, is not a pure fluid but a blend composed of:

- 23% R 32 + 25% R 125 + 52% R 134 A.

• The compressors approved for operation with this fluid are filled beforehand with polyalcohol oil.
Contrary to mineral oil, it is very hygroscopic: it absorbs the humidity of the ambient air very quickly. This can modify
its lubricant properties and lead in time to the destruction of the compressor.

MAINTENANCE INSTRUCTIONS

1 - Never add oil to the appliance; the compressor is filled with polyalcohol oil, a special oil which cannot tolerate the

presence of other oils.

2 - The instruments used for:

- filling,

- pressure measurements,

- emptying under vacuum,

- recovering the fluid,

must be compatible and only used for the R 407 C fluid.

3 - The weight of the refrigerant contained in the storage bottle must be checked constantly. Do not use it from the

moment the remaining weight is less than 10% of the total weight.

4 - In the case of a new charge:

- do not use the charging cylinder,

- use a balance and a dip pipe type R 407 C cylinder,

- charge the weight of R 407 C as per the value indicated on the unit’s identification plate,

- IMPORTANT: see instruction 3 above.

5 - The charge must be undertaken in liquid phase.
6 -In case of leakage, do not complete the charge: recover the remaining refrigerant for recycling and perform

a total charge.
Recovery, recycling or the destruction of the fluid must be done in compliance with the laws in force in the country
concerned.

7 - If the refrigerant circuit is opened, you must:

- avoid the entry of air into the circuit as much as possible,

- replace the filter drier,

- perform the "vacuum operation" at a minimum level of 0.3 mbar (static).

MARKING

This product marked conforms to the essential requirements of the Directives :

- Low voltage no. 73/23 EEC, modified 93/68 EEC.

- Electromagnetic Compatibility no. 89/336 EEC, modified 92/31 and 93/68 EEC.

- Pressure Equipment Directive No. 97/23/CE.

3

SUMMARY

1-Application - Use ..........................................................................................3

2-Description - Composition of unit - Accessories ..........................................3

3-Factory fitted options....................................................................................5

4-Technical and physical characteristics.........................................................7

5-Total cooling capacities and power consumptions.......................................9

6-Correction of cooling capacity....................................................................10

7-Total heating capacities and power consumptions ....................................10

8-Wet bulb temperature determination..........................................................11

9-Curves of available heads at unit outlet .....................................................11

10 - Sound levels...............................................................................................12

11 - Installation information ...............................................................................12

1 - APPLICATION - USE

• Air cooled type chilled water generator intended for climate control in buildings.

• Single package unit, factory assembled and tested.

• Designed for outdoor installation.

• Supplied fully charged with R 407 C refrigerant.

• Convenient hydraulic and electrical connections.

• Practical service access via removable panels.

2 - DESCRIPTION - COMPOSITION OF UNIT - ACCESSORIES

2.1 - DESCRIPTION

• The range includes 1 model type :

- PMHRV : An air cooled reversible chiled water generateur with built-in hydraulic module.

Refrigerant

R 407 C

Model

2 refrigerant circuits

2044 / 2050 / 2064 / 2072PMHRV

4

2.2 - COMPOSITION OF UNIT

i

f

e

b

d

c

4

6

1

g
a

j

h

2

8

5

3

7

9

9

Supply

to installation

Return from
installation

PMHRV

CONTROL 7

• Microprocessor µCHILLER control module, including:

- Chilled water temperature control.

- Control of operating parameters.

- Anti-short cycle system.

- Hour counter for each compressor.

- Automatic balancing of compressor operating time
(dual compressors).

- Air exchanger defrosting.

- Anti-freeze security (water exchangers).

- Digital display of:

. water temperature,
. set-point,
. alarm code (HP, LP, water output, thermal

protective devices, probes, anti-freeze…).

- Possibility of remote alarm signaling by a voltage-free
change-over contact and operating conditions via
remote µCHILLER display keypad (optional).

- Remote On/Off control via µCHILLER display keypad
(optional) or by voltage-free closing contact (remote
control box supplied with the unit).

- Circulation pump control.

• The thermostat controls fan rotation speed according to
the ambient temperature.

• For special applications, consult us.

CHASSIS - BODYWORK 8

• Galvanised sheet metal with light grey oven-baked
polyester powder paint.

BUILT-IN HYDRAULIC MODULE 9

a -1 polyurethane insulated sheetmetal buffer tank.
b -1 pump with insulated control valve - 2 shut-off valves.
c -1 filling valve Ø 1/2" female.
d -1 pressure gauge, 0-4 bar.
e -1 lack of water safety pressure switch.

f -1 safety valve.
g -1 air relief valve.
h -1 drainage valve.

i -1 expansion tank.

j - Placements for electric heating elements.

COMPRESSOR 1

• Hermetic SCROLL compressor with sound-proofing
cover.

• Installed on rubber anti-vibration pads.

• Internal thermal protection of the motor winding.

• Crankcase heater.

CONDENSER 2

•

Coil, consisting of copper pipes and crimped aluminium
fins.

• Protective grille.

• Condensation pressure probe with the proportional "All­season" control.

• Probe for defrosting.

FAN 3

• Direct driven axial fan.

• 2-speed motor, Y/∆ switching, 400V/3Ph/50Hz.

• Rotation speed 700 - 550 rpm.

• Insulation classification F.

• Internal thermal protection.

• Protection class IP55.

• Proportional "All-season" control, available as option.

EVAPORATOR 4

• Plate-type stainless steel (AISI 316L) water treatment
section with freezing protection.

• Antifrost electric heating resistor.

• Water circulation controlled by differential pressure switch.

• Water inlet temperature probes (for control).

• Temperature probe for antifrost protection.

REFRIGERANT CIRCUIT 5

•R 407 C refrigerant.

• Thermostatic expansion valve.

• Drier filter.

•Automatic reset high pressure and low pressure
switches.

• Copper tubing.

• Liquid receiver.

SWITCH BOX 6

• Accessible via hinge-mounted door.

• Main switch.

• Phase-sequence tester.

• Power and control circuitry protected by magnetothermal
circuit breakers.

• Complies with standard EN 60 204-1.

• Short circuit current 10 kA, as per IEC 947-2.

5

2.3 - ACCESSORIES

2.3.1 - ANTI-VIBRATION KIT

• Kit includes:

-1 set of 4 anti-vibration plates, thickness 25 mm - code K 60 L 035 Z.

-1 set of 2 flexible hoses: length 1.5 m, Ø 1" 1/2 - code K 60 L 034 Z.

2.3.2 - REMOTE CONTROL UNIT (supplied with the unit)

• Ensures remote On/Off control and Heating/Cooling selection (link not provided; max. length = 100 m).

3 - FACTORY FITTED OPTIONS

3.1 - HP and LP PRESSURE GAUGES

• Code K 60 X 002 M for PMHRV 2044, 2050 and 2064,

• Code K 60 X 004 M for PMHRV 2072.

• These elements, mounted on the vertical members of the unit's front face, display the high and low pressure values for each
refrigeration circuit.

3.2 - OPTIONAL BACK-UP PUMP

• Code K 60 L 064 M for PMHRV 2044 to 2072.

• The switchover of the electrical supply onto the 2

nd

pump is performed manually by a switch box placed near the pumps.

3.3 - ANTI-FREEZE RESISTANCE

• Code K 60 C 010 M.

• Immersion heater mounted on the tank of the hydraulic module.

• Power: 800 W, single-phase 230 VAC.

• With limiting thermostat.

• The power supply and heating element control are to be done separately at the time of installation (not supplied).

• NOTE: The anti-freeze heating element cannot be installed with the supplementary heating option (paragraph 3.6).

3.4 - PROPORTIONAL "HEAD PRESSURE" CONTROL KIT

• Code K 60 G 031 M for PMHRV 2044 to 2072.

• This function is operational only in "cooling" mode.

• Required for units operating in environments in which outside air temperature is below +14° C.

• Varies fan speed according to the condensation pressure.

• Factory-set for optimal operation. For all other settings, consult us.

3.5 - REMOTE "µCHILLER" DISPLAY KEYBOARD

• Code K 60 D 037 M.

• Enables transfer of display keyboard functions up to 150 m.

• See the manual which accompanies this accessory.

• IMPORTANT:

• With this accessory, the µCHILLER control is factory-configured for startup using the specific cooling or heating
keys on the display keypad.
In this case, the digital On/Off and Remote Heating/Cooling Inversion inputs are Inactive.

• By special factory-set parameters (specify when ordering), these digital inputs may remain active. In this case, the
cooling and heating keys on the display keypad are inactive.

• IMPORTANT:

•In the case of PMHRV units with the electric heating option, the cooling , and heating keys on the display
keypad are inactive. The On/Off and Heating/Cooling inversion commands are thus made by the remote selector supplied
with the unit or with the control box (optional item).

6

3.7 - VENTILATION WITH AVAILABLE PRESSURE

(for a unit installed in a room)

• Code K 60 Q 002 M for PMHRV 2044 and 2050

• Code K 60 Q 005 M for PMHRV 2064 and 2072

3.6 - AUXILLIARY ELECTRIC HEATING

• The heater consists of immersion heaters each rated at 16 kW (400 V, 3-phase), secured to the hydraulic module's
buffer tank.

• These immersion heaters are controlled from a specific unit with 2-stage control, and the power feeders are protected by
circuit breakers and a master switch (power supply separated).

• Backup is authorized with the 2nd stage, although is triggered only if the generator is out of service.

• The power supply for this heating system is connected separately (3-phase 400 V).

• Each heating assembly is equipped with a safety thermostat with 2 thresholds (1 automatic reset threshold and 1 manual reset
threshold).

PMHRV 2044 to 2072

Back-up - 16 kW

2nd stage - 16 kW

1st stage - 16 kW

Water
outlet

Tank

Water inlet

Immersion heater with security

Heating power: 48 kW
Current : 70 A

Code K 60 C 480 M : Standard

7

Cooling capacity kW
Total nominal power consumption Cooling kW
Total nominal current Cooling A
EER
Heating capacity kW
Total nominal power consumption Heating kW
Total nominal current Heating A
COP
Water flow rate Cooling m

3

/h

Heating m

3

/h

Nominal pressure drop on water Cooling kPa

Heating kPa
Hydraulic connection male 1"1/2 (40 x 49)
Total nominal power consumption Heating kW
Total nominal current Heating A
Starting current A
Electrical supply cable section mm

2

Sound-proofed hermetic SCROLL compressor

Number
Nominal current per compressor Cooling A

Heating A

Power consumption per compressor Cooling kW

Heating kW
Refrigerant circuit (number)
R 407 C refrigerant charge kg
Stainless steel brazed plate-type water exchanger

Number
Water capacity litres

Helicoidal fan (direct driven)

Number
Diameter mm
Rotation speed Cooling rpm
per motor Heating rpm
Nominal current Cooling A
per motor Heating A
Power consumption Cooling kW
per motor Heating kW

Installation water capacity

Buffer tank litres

Expansion tank (operating pressure: 1.5 bar) litres
Safety valve pressure bar
Available head kPa
Electrical characeristics hydraulic pump

Maximum power consumption (pump only) kW

Maximum current A
Maximum power consumption per unit (*) kW
Maximum current per unit (*) A
Starting current A

4 - TECHNICAL AND PHYSICAL CHARACTERISTICS

4.1 - TECHNICAL CHARACTERISTICS

40.60

17.50
32

2.32
49

17.80

34.50

2.75

6.94

8.42
23
35

●

18.90

36.80
165

16

●

2

14.90

15.70

8.36

8.51
2

2 x 8

●

2

3.40

●

2

760
550
700

0.70

1.20

0.39

0.65

300

18

3

215

1.60

2.80

22.80

39.60
165

52.60

19.20

34.8

2.74
54
19

36.50

2.84

9

9.40
55
63

●

20.10

38.80
170

16

●

2

16.30

16.70

8.95

8.85
2

2 x 9

●

2
4

●

2

760
550
700

0.70

1.20

0.39

0.65

300

18

3

175

1.60

2.80

26.40

45.80
170

60.60
27
50

2.24
69
27

45.30

2.55

10.42

11.86
50
62

●

28.10

47.60

185

16

●

2

23.40

20.50

12.78

11.18

2

2 x 9.5

●

2
5

●

2
760
550
700

1.20

1.80

0.60

0.80
300

18

3

70

1.60

2.80

35.80

61.20
185

67

28.80

53.8

2.33
76

29.40

52.80

2.58

12.10

14.44
47
56

●

30.50

54.10

225

25

●

2

24.75

24.20

14.48

14.98

2

2 x 12.5

●

2

5.80

●

2
760
700
700

1.80

1.80

0.80

0.80
300

18

3

30

1.60

2.80

39

70.60
225

2044 2050 2064 2072

PMHRV

Consult us for any special climatic conditions departing significantly from the nominal conditions.

• Power supply:

400V (±10%) / 3Ph + Earth / 50Hz

• Nominal operating conditions:

• COOLING - water intlet temperature : + 12°C

- water outlet temperature : + 7°C

- outdoor dry bulb temperature : + 35°C

• HEATING - water intlet temperature : + 40°C

- water outlet temperature : + 45°C

- outdoor dry bulb temperature : + 7°C

- outdoor wet bulb temperature : + 6°C

• Operating limits:

• COOLING

- temperature of inlet air to condenser
. standard : + 14°Cto+ 43°C
. with head pressure control: - 10°Cto+ 43°C

(optional: proportional fan speed control)

- pure water outlet temperature : + 4°Cto+ 15°C

• HEATING

- water outlet temperature : + 30°Cto+ 50°C

- outdoor dry bulb temperature : - 10°Cto+ 20°C

(as per model)

(*) In the operating range.

8

Condenser air discharge
Condenser air suction

a Water outlet connection

b Water inlet connection

c HP and LP hose entry

d Water outlet connection (with back-up pump)

Dimensions (in mm) are
given for standard units
without options.

General tolerance ±10 mm.

Power supply
Power supply (local or anti-freeze)

Location of the 4 anti-vibration pads
(100 x 100 x 25 mm) under girders

G Centre of gravity (in the centre of the unit)

(1)

b

cd

1955

a

x

G

1175 (1425 PMHRV 2072)

450 180

950350

(1)

500

654

180

Access to switch box

2 HP Manometers

(optional)

2 LP Manometers
(optional)

262

1050

262

Electric heating control unit (optional)

4 Ø 22.5 mm holes
for sling attachment

4.2 - PHYSICAL CHARACTERISTICS

Overall
packed

dimensions

2,015 mm
1,135 mm
1,890 mm
2,140 mm

PMHRV 2072

Length
Depth

Height

2044
2050
2064
2072

Net

weight

872 kg
876 kg
910 kg
982 kg

Packed

weight

PMHRV

912 kg
916 kg
950 kg

1,022 kg

• Clearances to be respected
for unit operation and
maintenance.

• No obstacle less than 3 m above
the unit.

Front

300

300

1000

300

9

COOLING CAPACITIES

TOTAL POWER CONSUMPTIONS

45678 11

12

14 15

18

38

910

13

22

26

30

34

36

32

28

24

20

45678 11

12

14 15

48

104

910

13

56

64

72

80

88

96

45678 11

12

14 15

16

32

910

13

18

20

22

24

26

28

45678 11

12

14 15

40

76

910

13

48

52

64

68

72

60
56

44

45678 11

12

14 15

0

24

910

13

4

8

12

16

20

45678 11

12

14 15

0

70

910

13

10

20

30

40

50

60

Total power consumption (kW)

Water outlet temperature (°C)

PMHRV

2044

Cooling capacity (kW)

Water outlet temperature (°C)

Total power consumption (kW)

Water outlet temperature (°C)

PMHRV

2050

Cooling capacity (kW)

Water outlet temperature (°C)

Total power consumption (kW)

Water outlet temperature (°C)

PMHRV

2064

Cooling capacity (kW)

Water outlet temperature (°C)

468101214161820

20

22

24

26

28

30

32

34

36

38

468101214161820

50

60

70

80

90

100

110

120

130

Total power consumption (kW)

Water outlet temperature (°C)

PMHRV

2072

Cooling capacity (kW)

Water outlet temperature (°C)

∆ T (water) between 4 and 6°K.

5 - TOTAL COOLING CAPACITIES AND POWER CONSUMPTIONS

Outdoor temp. = 15°C
Outdoor temp. = 25°C
Outdoor temp. = 35°C
Outdoor temp. = 45°C

Outdoor temp. = 45°C
Outdoor temp. = 35°C
Outdoor temp. = 25°C
Outdoor temp. = 15°C

Outdoor temp. = 43°C
Outdoor temp. = 35°C
Outdoor temp. = 25°C
Outdoor temp. = 15°C

Outdoor temp. = 45°C
Outdoor temp. = 35°C
Outdoor temp. = 25°C
Outdoor temp. = 15°C

Outdoor temp. = 45°C
Outdoor temp. = 35°C
Outdoor temp. = 25°C
Outdoor temp. = 15°C

Outdoor temp. = 15°C
Outdoor temp. = 25°C
Outdoor temp. = 35°C
Outdoor temp. = 43°C

Outdoor temp. = 15°C
Outdoor temp. = 25°C
Outdoor temp. = 35°C
Outdoor temp. = 45°C

Outdoor temp. = 15°C
Outdoor temp. = 25°C
Outdoor temp. = 35°C
Outdoor temp. = 45°C

10

HEATING CAPACITIES

TOTAL POWER CONSUMPTIONS

-10 -4 0 4 8 12 16

12

14

16

18

20

-8 -2 2 6 10 14-6

26

22

24

50°C
45°C
35°C

-10 -4 0 4 8 12 16

30

40

50

60

80

-8 -2 2 6 10 14-6

70

50°C
45°C
35°C

-10 -4 0 4 8 12 16

12

14

16

18

20

-8 -2 2 6 10 14-6

22

50°C
45°C
35°C

-10 -4 0 4 8 12 16

30

40

50

60

70

-8 -2 2 6 10 14-6

35°C
45°C
50°C

Total input power (kW)

Outdoor wet bulb temperature (°C)

PMHRV

2044

Heating capacity (kW)

Outdoor wet bulb temperature (°C)

Total input power (kW)

Outdoor wet bulb temperature (°C)

PMHRV

2050

Heating capacity (kW)

Outdoor wet bulb temperature (°C)

Water outlet temperature

Water outlet temperature

Water outlet temperature

Water outlet temperature

1.30

1.20

1.10

1.00

0.94

010203040

0

-5

-10

-15

-20

-25

1.19

1.113

6 - CORRECTION OF COOLING CAPACITY

PRINCIPLE OF USING THE CURVES

A- Choose the percentage of glycol according to the

minimum temperature to protect the hydraulic circuit
against frost.

B - Example:

Protection at an external temperature of -15°C, which
gives 30% glycol (freezing points curve).

The loss of capacity is given on the "Reduction of cooling
capacity" curve (0.94).

The new flow is given by the coefficient on the water flow
curve (1.113).

Likewise, to determine the new pressure drop
coefficient in relation to the nominal flow, read the
pressure drop curve (1.19).

Valid curves for setting temperature at the water
inlet.

% in weight of ethylene glycol

Correction factors

Outdoor temperature

°

C

Reduction of cooling capacity

Water flow

Pressure drop

Freezing points

• IMPORTANT:
Use monopropylene glycol (a minimum rate of 15% to 20% is needed to avoid any risk of corrosion).

7 - TOTAL HEATING CAPACITIES AND POWER CONSUMPTIONS

∆ T (water) between 4 and 6°K.

11

∆ T (water) between 4 and 6°K.

18

20

22

24

26

28

30

32

34

36

-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16

50°C
45°C
35°C

48

56

64

72

80

88

96

-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16

50°C
45°C
35°C

-10 -4 0 4 8 12 16

18

20

24

26

32

-8 -2 2 6 10 14-6

30

22

28

50°C
45°C
35°C

-10 -4 0 4 8 12 16

44

60

68

76

96

-8 -2 2 6 10 14-6

88

52

80

50°C
45°C
35°C

Total input power (kW)

PMHRV

2064

Heating capacity (kW)

Outdoor wet bulb temperature (°C)

Total input power (kW)

Outdoor wet bulb temperature (°C)

PMHRV

2072

Heating capacity (kW)

Outdoor wet bulb temperature (°C)

Water outlet temperature

Water outlet temperature

Water outlet temperature

Water outlet temperature

HEATING CAPACITIES

TOTAL POWER CONSUMPTIONS

8 - WET BULB TEMPERATURE DETERMINATION

• Example:

On the wet bulb temperature determination curve, with a
dry bulb temperature of 13°C and 70% relative humidity;
we read a wet bulb temperature of 10°C.

25

24
22
20
18
16
14
12
10

8
6
4
2
0

-2

-4

-6

-8

-10
20151050-5

70 %
50 %
30 %

90 %

Dry bulb temperature (°C)

Wet bulb temperature (

°

C)

WET BULB TEMPERATURE

Relative humidity

56789101112 13 14 15

0

50

100

150

200

350

250

300

PMHRV 2072
PMHRV 2064
PMHRV 2050
PMHRV 2044

9 - CURVES OF AVAILABLE HEADS AT UNIT OUTLET

Water flow rate (m3/h)

Available head (kPa)

Outdoor wet bulb temperature (°C)

12

R.D. 28 Reyrieux BP 131 01601 Trévoux CEDEX France
Phone [phone] - Fax [phone]
R.C.S. Bourg-en-Bresse B 759 200 728

11 - INSTALLATION INFORMATION

• See details in the installation manual.

11.1 - INSTALLATION

• Protection index of the unit:

- IP 44 : for the electrical equipment,
(IPXXB : for the mechanical hazards).

• Before installation, verify the following points:

- the unit must be installed outside in an appropriate location and in compliance with environmental requirements (sound
level, integration, etc...),

- the water chiller’s installation location must be perfectly level and strong enough to support the weight of the unit and must
have adequate inundation protection,

- sufficient space around the unit should be provided in order to facilitate servicing and maintenance operations,

- air suction to the coil and fan discharge must not be obstructed,

- install the unit above the region’s average snowfall level.

- vibrations and noise must not be transmitted to adjacent buildings,

- install the machine on anti-vibration pads and fit hoses on piping elements, as required,

- if necessary, consult an acoustics specialist concerning the unit’s optimum location,

-4 holes Ø 22.5 enable to place hoisting hooks and lift the unit.

11.2 - ELECTRICAL CONNECTIONS

• All required information is indicated on the electrical diagram provided with the unit and in the installation manual.

• Connections are to be made in compliance with the standard code of practice and as per the standards in force at the site
of installation.

11.3 - HYDRAULIC CONNECTIONS

• The hydraulic connections are to be made in compliance with
the standard code of practice.

• IMPERATIVE: Install the filter supplied on the water inlet of
the unit.

11.4 - STARTING - MAINTENANCE

• Refer to the installation guide and the maintenance manual.

• IMPORTANT:

- Without anti-freeze resistance option

If a freeze risk is present, one must:

- either drain the installation,

- or inject glycol into the system.

- With the anti-freeze resistance option

The electrical power supply must be separate from
the generator power supply (if power the generator
is cut, the unit would no longer be protected from
freezing). External installation pipework must be
protected.

10 - SOUND LEVELS

• Nominal operating conditions:

- Ambient temperature: 35°C.

• Sound-pressure level:

- Unit installed outdoors (free field) on a reflective
surface.

- Mesasurement carried out at a distance of 10 m.

Distance
in metres

dB to be

deducted from

the sound

power level

40

35

30

25

10 15 20 25 30

PMHRV

2044
2050
2064
2072

Sound-pressure

level (dBA)

50
48
52
57

Power level

(dBA)

78
76
80
85

Due to our policy of continuous development, our products are liable to

modification without notice.