Technibel PMHRV 2044, PMHRV 2072, CMHGV 2050, CMHGV 2080 Installation Instructions Manual

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March 2005 10 11 384 - GB - 04

INSTALLATION INSTRUCTIONS

AIR COOLED WATER CHILLER HEAT

PUMP

WITH BUILT -IN HYDRAULIC MODULE

R 407 C refrigerant

PMHRV 2044 / 2072

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.

SUMMARY

1-Generalities ................................................................................... 2

2-Dimensions.................................................................................... 3

3-Installation ..................................................................................... 4

4-Connections................................................................................... 4

5-Options .......................................................................................... 7

6-Starting ........................................................................................ 12

7-Operation of µCHILLER electronic control .................................. 13

8-Maintenance ................................................................................ 19

9-Pressure curves........................................................................... 22

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).

1 - GENERALITIES

• The equipment must be installed, started-up and maintained by authorised and qualified personnel, in accordance with local rules and professional standards.

• The recommendations and instructions presented in the manual and on labels must be followed.

1.1 - GENERAL SUPPLY CONDITIONS

• The units must be securely anchored to the truck’s trailer during transport.

• Generally speaking, the material is transported at the consignee’s risk.

• In the event of damages during transport, the consignee must notify the carrier by registered letter within three days following delivery.

1.2 - VOLTAGE

• Before carrying out any operation, check that the voltage indicated on the unit corresponds to the mains voltage.

• Before servicing the unit, ensure that the electrical power supply has been shut off and warning signs installed.

1.3 - TECHNICAL AND PHYSICAL CHARACTERISTICS

• See technical data.

1955

950350

1175 (1425 PMHRV 2072)

450 180

262

1050

262

125

180

(1)

654

500

2 - DIMENSIONS

Access to switch box

Dimensions (in mm) are given for standard units without options. General tolerance ±10 mm.

PMHRV 2044

2050 2064 2072

Condenser air discharge Condenser air suction

a Water inlet connection b Water outlet connection c HP and LP hose entry

Power supply Power supply

(back-up or antifreeze) Location of the 4 anti-vibration

pads (optional) (100 x 100 x 25 mm) under girders

G Centre of gravity

(1)

4 Ø 22.5 mm holes

for sling attachment

3 - INSTALLATION

• Prior to all servicing or other actions on the equipment, installation, commissioning, operation, or maintenance, the personnel in charge of these operations shall become familiar with the instructions and recommendations provided in the installation manual of the unit as well as the elements of the project's technical file.

• The personnel responsible for receiving the unit must conduct a visual inspection in order to identify all damage to which the unit may have been subjected during transport: refrigerating circuit, electrical cabinet, cassis and cabinet.

3000

300

1000

300

learances to be respected

2 lower side panels must be removed to gain access to the 2 screws which secure the unit to the wooden base.

• The unit must not be installed near the following:

- sources of heat,

- combustible materials,

- return/air intake of an adjacent building.

• The unit must be installed, started, maintained and repaired by qualified servicing personnel in compliance with the requirements of all directives, laws and regulations and in accordance with standard trade practices.

• During installation, troubleshooting and maintenance operations, the use of pipes as a step: under the stress, the pipe may rupture and the refrigerant may cause serious burns.

• The unit is delivered on a wooden pallet and shrink-wrapped.

• PMERV units are secured to the pallet by two screws for transport. They can be accessed and extracted by removing the 2 lower side panels.

•A lift truck may be used to remove the unit from its pallet.

• Handle the unit with care.

• Crane installation: once the plastic film has been removed, the machine may be lifted by placing the hoisting hooks into the four Ø 22.5 holes.

• Spacers or protective pads should be placed between the slings and body to avoid damage.

• The unit's centre of gravity and weight are indicated on the space requirement diagrams and in the table of the technical documentation.

• 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 unit’s installation location must be perfectly level and strong enough to support the weight of the unit and must have adequate inundation protection. Attention: the condensates are not connected to a condensate collector.

- sufficient space around the unit should be provided in order to facilitate servicing and maintenance operations (see drawing above),

- 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.

• AVOID:

- excessive exposure to sea-air or corrosive gases,

- the proximity of the extractor fan,

- projections of mud (next to a roadway or path, for example),

- areas where there is strong wind blowing against the unit's air exhaust.

• Protection index of the unit:

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

4 - CONNECTIONS

4.1 - HYDRAULIC CONNECTION

• Connect the water pipes to the corresponding connections:

- PMHRV 2044 to 2072 : male 1" 1/2 (40 x 49).

• Connect the hydraulic filter onto the water intake. Also provide 2 isolation valves for intake cleaning purposes.

• The pipes must be at a sufficient distance from the removable panels to enable servicing operations to be performed.

• Make the connection with flexible hoses preferably.

• The diameter of the pipes must be calculated according to the installation (take care with high head losses).

A Clearance must be 300 mm.

4.2 - ELECTRICAL CONNECTION

4.2.1 - GENERALITIES

• In all cases, refer to the wiring diagrams supplied with the unit or supplied upon request.

• The acceptable voltage variation is: ±10% during operation.

• The electrical connection conduits must be fixed.

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

• Class 1 unit.

• Use the holes fitted with grommets for passing cables into the unit.

• The electrical installation must comply with the standards and regulations applicable where the unit is being installed (in particular NFC 15-100

CEI 364).

• The machine is intented for connection to the mains according to existing regulations.

4.2.2 - GENERATOR POWER SUPPLY

• The power supply must be three-phase 400V/50 Hz, in the electrical box, on the power terminal strip (see electrical diagrams).

CAUTION: Before starting the unit, ensure that the phase rotation order is correct. The phase-sequence controller restricts the unit from operating if the 3 supply phases are not in order or if a phase is absent.

• The power supply must come from an isolation and electric protection device (not supplied) in accordance with existing regulations.

• The sizing of the power supply cables is to be ensured by the installer in accordance with the installation conditions and as per current standards.

Cable sizes, indicated below, are given for information purposes. They are calculated in accordance with NFC 15-100 (

CEI 364) with the following hypotheses:

- Maximum current, see table below.

- Multi-pole copper cable with PR insulation.

- Installation in non-ventilated cable duct (installation method No. 41). No other power cable.

- Ambient temperature 40°C.

• The lengths indicated below correspond to a voltage drop less than 5% in the cable.

2044

165

39.6 16

100

2050

170

45.8 16

100

2064

185

61.2 16

100

2072

225

70.6 25

150

PMHRV

Starting current A Max. total current A Power supply cable section mm

Max. connection length m

• The complete electrical specifications are given in the table of the technical documentation.

• Note: The power supply of the anti-gel resistance option (or the auxilliary heating option) is to be separately at the time of installation.

4.2.3 - AUXILLIARY HEATING POWER SUPPLY (optional)

• The power supply (three-phase 400V) is separate from the generator and is connected directly on the power switch of the heating control unit.

• The power supply must come from an isolation and electric protection device (not supplied) in accordance with existing regulations.

• The sizing of the power supply cables is to be ensured by the installer in accordance with the installation conditions and as per current standards.

Cable sizes, indicated below, are given for information purposes. They are calculated in accordance with NFC 15-100 ( CEI 364) with the following hypotheses:

- Maximum current, see table below.

- Multi-pole copper cable with PR insulation.

- Installation in non-ventilated cable duct (installation method No. 41). No other power cable.

- Ambient temperature 40°C.

Heating power kW Max. current A Power supply cable mm

Max. connection length m

PMHRV 2044 to 2072

48 70 25

150

• The lengths indicated below correspond to a voltage drop less than 5% in the cable.

PMHRV

2044 to 2072

Heating

control

box

4.2.4 - SUPPLEMENTARY ELECTRIC HEATING FAULT REPORT (option)

• For the standard control versions, a potential-free changeover contact (5A resistive, 250VAC max.) is available on the heater control unit’s terminal strip (terminals 14, 15 and 16).

• The toggling of the contact signals that the overheating control has tripped or low voltage on the heater power supply.

4.2.6 - OTHER CONNECTION POSSIBLITIES

• Alarm transfer

Change-over contact, potential free (5A resistive - 250 VAC max.) on the unit terminal strip for remote signalling (common terminal 36, contact NO 37, contact NF 38).

• Auxiliary electric heating authorization for PMHRV

It may be connected to another exterior potential-free contact (not included) authorizing the electric heating operation (contact closed = heating authorized). This contact is to be connected to terminals 4 and 5 of the heating unit control box (remove the bridge).

CAUTION: As this signal is 230 VAC, use an adequate contact and cable to make the connection.

4.2.5 - REMOTE CONTROL

A - PMHRV WITHOUT BACK-UP HEATING OPTION

• The unit is factory-wired for heating mode operation. However, we recommend that operating mode change-over (heating/cooling) be controlled by connecting 2 good-quality, potential-free external contacts (not supplied):

Remote control "off"

Operating mode

(❋)

(❋) Jumper to be removed

(❋)

Principle

Control unit

Operating mode

(❋)

(❋) Jumper to be removed

(❋)

Remote control "off"

-1 for the remote On/Off signal

- contact closed = operation authorized,

- contact open = off,

-1 for change-over of the operating mode

- contact closed = heating mode,

- contact open = cooling mode. The control unit, supplied with the unit, enables this function to be performed.

• These contacts are supplied with 24V by the generator’s control circuit.

• The wiring of these contacts must not be routed near power cables in order to avoid electromagnetic disturbances.

• Max. connection cable length: 100 m, 1.5 mm2.

CAUTION:

Mode changes (heating/cooling) are to be performed with the unit shutdown.

B - PMHRV WITH BACK-UP HEATING OPTION

• The same as stated above, although in this case the command contacts are to be connected to the terminal in the electric heater’s control box.

Remote control "off"

Operating mode

Principle

Control unit

Operating mode

Remote control "off"

(❋) Jumper to be removed

(❋)

Electric heating authorized

(for example: load shed, outside thermostat…).

5 - OPTIONS

5.1 - AUXILLIARY ELECTRIC HEATING OPTION

5.1.1 - PRESENTATION

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

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

• Securities:

- One of the immersion heaters is equipped with a 2-threshold safety thermostat: one automatic reset threshold which is factory set at 70°C and a manual reset set at 87°C.

- All malfunctions detected by this thermostat results in the shut-down of the electric heating.

- After having turned off (and locked out) the power to the unit and corrected the malfunction, the safety device is reset by pressing the button located on the body of the thermostat. This thermostat is accessible under the immersion heater’s head cover.

- This heater is also slaved to the operation of the water circulating pump.

- These immersion heaters are controlled from a specific heating control box (see location in paragraph 4.2.3), equipped with:

- either a 2-stage electronic controller in standard version (see paragraph 5.1.2),

- or a command module which is controlled directly by the control box (see paragraph 5.1.3).

5.1.2 - OPERATION WITH STANDARD REGULATION UNIT

A - PRESENTATION

• The following are located inside the

heating control box:

- the power switch to which the electric heating power supply is connected,

-lthe power outgoing feeders, protected by circuit breakers, supplying electrical power to the immersion heaters,

- the 2-stage electronic controller handling the operation of the electric heater and controlling the generator (with its water circulation pump) according to:

- the On/Off and Heating/Cooling selection made on the remote control,

- the system’s water temperature (installation return) measured by a probe.

30 31

32 33

10 13

34S156

R1 R2 GR

Chaud

Heat

Froid

Cool

Mode indicator

(by remote control)

Generator ON indicator

Electric heater

2nd stage ON

indicator

Electric heater

1st stage ON

indicator

1st stage

command

Generator command

Remote

control

Water temperature probe

(installation return)

2nd stage

command

Pump

command

Regulation

power supply

(230V)

On/Off

HEAT/ COOL

PMHRV 2044 to 2072

Back-up - 16 kW

2nd stage - 16 kW

1st stage - 16 kW

Water outlet

Tank

Water inlet

Security

Code K 60 C 480 M : Standard

Heating power: 24 kW Current : 35 A

• The potentiometers used to set the various thresholds are located under the cover of the controller’s front panel.

B - WATER TEMPERATURE PROBES

(heating option)

• CTN type 3 kΩ at 25°C.

• Probe defect:

If the temperature value measured is outside of the measurement range (-20°C to +84°C), the indicator light of the selected mode begins to flash and the R1 and R2 heating control outputs are disabled.

C - HEATING MODE

• With the remote mode inversion contact being closed ("Heating" indicator of the controller on), the closure of the remote On/Off contact:

-Activates the pump.

-Activates the generator in heating mode, provided that the water temperature is greater than the corresponding adjustable cut-in threshold AJ3.

-The generator "on" indicator GR thus comes on. (If the generator is solicited and the temperature is lower than the threshold, this indicator flashes).

-Authorizes the auxiliary heating outputs to function in accordance with the diagram opposite.

• NOTE:

- The cut-in of each of the auxiliary stages is signaled by the indicator light (R1 and R2).

- The cut-in of the 2nd stage is timed at 5 min. (during this time period, the corresponding indicator light flashes).

• The opening of the remote On/Off contact causes the time delayed shutdown of the pump (5 min.) and the immediate shutdown of the generator and auxiliary stages. The corresponding indicator lights are thus off.

36 39

30 45

14 16

10 20

29 31

25 35

DL3 DL4 DL5

DL2DL1

AJ1

appoint

AJ2

offset

AJ3

limite

chaud

AJ4

limite 

froid

Temperature (°C)

-10 0

10 20 25 30 40 50 60

Ohmic value (Ω)

16,600

9,796 5,971 3,748 3,000 2,417 1,598 1,081

747

1 K 1 K

stage

AJ1 auxiliary heating set point

Shift AJ 2

Water tempearature

D - COOLING MODE

• With the remote mode inversion contact being open (the controller’s “Cooling” indicator on), the closure of the remote On/ Off contact:

-Activates the pump.

Activates the generator in cooling mode, provided that the water temperature is less than the cut-in threshold:

- Generator operation is restricted if the water temperature is greater than 35°C.

- Operation is authorized for only 30 minutes if the temperature is greater than the adjustable threshold AJ4. This time delay is reinitialized if the stop signal is present or if the temperature is greater than 35°C.

- The generator "on" indictor light GR glows steadily if the generator is activated. (If the generator is solicited and the temperature is greater than the threshold, this indicator flashes).

• The opening of the remote On/Off contact causes the time delayed shutdown of the pump (5 minutes) and the immediate shutdown of the generator. The generator "on" indicator GR is thus off.

• In this mode, the heating outputs are disabled.

AJ1

Electric heater

stage

cut-in

temperature

38°C

AJ2

Electric heater

stage cut-in offset

5 K

AJ3

Generator

authorization

threshold

in heating mode

15° C

AJ4

Generator

authorization

threshold

in cooling mode

25° C

Potentiometer

Function

Factory settings

5.2 - OTHER OPTIONS

5.2.1 - OPTIONAL BACKUP PUMP OPTION

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

•

The switchover of the electrical supply onto the 2nd pump is performed manually by a switch box placed near the pumps

5.2.2 - 800 W ANTI-FREEZE OPTION

• Code K 60 C 010 M.

• The immersion heater's power supply and control shall be separate from all other installation circuits. It must be installed by qualified service personnel who are familiar with this type of equipment and in compliance with local regulations and recognized trade practices.

• Before all operations on the unit, make sure that the power supply is disconnected and locked out.

• The 230 VAC electrical power supply must be fitted with a separate overcurrent protection and disconnect switch in compliance with the rules and regulations in force.

• The power supply wiring must be secured. Use the cable gland located on the immersion heater cover.

- Note 1: The immersion heater is equipped with an adjustable limiting thermostat set at approximately 5°C.

- Note 2: Power to the immersion heater must be turned on only when the circuit is full of water.

- Note 3: Make sure that wiring is securely clamped in the terminal block and the ground connection is correctly attached.

800W

230V

2 1

Thermostat

Cover

Thermostat

-35°C / +35°C preset at 5°C

Phase

Neutral

Earth

ATTENTION: The frost protection resistance cannot be installed with the supplementary heating option.

5.2.3 - REMOTE µCHILLER DISPLAY KEYBOARD

• Code K 60 D 037 M.

A - USE

• Enables remote operation of the display keyboard (refer to the module's technical manual).

Note: The display keyboard installed on the unit remains operational. Main characteristics

• Wall-mounted housing.

• IP 20.

• Operating temperature: 0°C to 50°C

• Storing temperature : -10°C to +60°C

• Humidity (HR) : 90% without condensation.

• Ambient pollution : Normal.

• Max. distance : 150 m.

B - KIT CONTENTS

•1 remote control unit with mounting screws.

•1 interface board to be installed inside the remote control module.

Note 1: The accessory also includes an interface board connected to the unit's I/O board. This interface board is

factory-installed.

Note 2: µCHILLER controls are factory-set for operation with 2 display keyboards. If one of the display

keyboards is disconnected, the "Cn" message flashes on the other module's display. The µCHILLER setting maintains control of the machine.

C - CONTROL MODULE INSTALLATION

D - ELECTRICAL CONNECTION

Principle

chiller

SEL

x100h

47 1217

17 32

Ø 20

31115

Dimensions in mm

• Make the hole for the cable link.

• Install the control module base (see location of mounting holes opposite).

•Connect the cable to the interface board MCHRET0000 (included in the kit) according to the wiring diagram in paragraph 4 and install the assembly in the module.

Remote control

Centering pins

Interface board

MCHERT0000

• Slide micro-switch N°1 (remote control address) to the "ON" position. This micro-switch is located inside the remote control module. NOTE: The settings of the micro-switches on the

back of the unit's display keyboard are not to be changed (position indicated in the paragraph 7).

• Install the control module onto its base with the supplied screws and screw covers.

• Start the installation and check that both display keyboard units operate.

Rear view

Interface board terminal

Micro-switch N° 1

☞

keypad

buzzer

to power board

address

0=1 term 1=2 term

SK+

SK-

D+

D-

GND

+24V

on (1)

off (0)

4 3 2 1

chiller

SEL

x100h

SK+ SK- D+ D- GND +24V

SK+

SHLD

SKD+ DGND +24V

GND

GND GNDG

G0 B1 B2 B3

IDCOM ID2

ID4 ID6

ID1 ID3 ID5 ID7

P1 P2 P3 P4 P5

3 2 1

B1 B2 B3 B4 B5

KEY

SERIAL

RES.1 COMP.1 VALVE1 PUMP AMARM

Y1 NO C NO C NO C NC NO C NCNO C

comp

x 100

PRG

mute

SEL

chiller

clear

Interface board µCHILLER I/O

Unit electrical box

Interface board

Remote control

150 m

Local terminal

Shielding

Connection detail

• Type of cable:

-3 twisted pairs, shielded,

- resistance < 80 mOhm/meter.

• Do not route this cable near power cables.

• Use a cable gland and grommet for passing the cable into the unit.

SK+

SK-

D+

DGND +24V

SK+ SKD+ DGND +24V

SHLD

Remote

control

Unit

150 m maximum

• See complete details in the module's technical manual.

• Indicator lights:

Heating mode ("Winter") Cooling mode ("Summer").

Compressor on. Flashes if the safety relay is activated; light fixed when compressor is operating.

Hour meter value (multiply by 100).

E - DISPLAY KEYBOARD FUNCTIONS

chiller

SEL

x100h

PRG

mute

clear

x100h

• Keys:

Increase or decrease of parameter codes and their displayed value.

Access to the parameters (hold 5 seconds). Returns the display to normal and validates modified

parameters. Display brightness adjustment.

Alarm sound shut-off.

SEL

PRG

mute

clear

(❋)

(❋) Important information concerning operation of start-up/shut-down keys:

• With the remote control module, settings are factory-set for start-up (and selection of the Cooling/Heating mode for heat pump units) with the display keyboard keys. In this case, the remote On/Off and Cooling/Heating inversion digital inputs are deactivated.

For special factory-set parameters (specify when ordering), these

digital inputs may be configured to remain active.

In this case, the display keyboard's and keys are inactive.

• For PMHRV units with auxiliary electrical heating, the device can only be controlled by the On/Off digital inputs and remote Heating/Cooling change over.

In this case, the and keys of the display keyboards are inactive.

5.2.4 - PROPORTIONAL "HEAD PRESSURE" CONTROL KIT

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

• Nécessaire pour une utilisation de l'appareil avec une température extérieure inférieure à +14°C.

• Based on the information gathered by the specific pressure sensor(s), the control varies the supply voltage of the electric fans in accordance with the diagram opposite.

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

Max. voltage

Min. voltage

Condensation pressure

5.2.5 - 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.

Reset of alarms and hour meters (hold 5 seconds).

Activation (or deactivation) in Cooling ("Summer") mode (hold five seconds).

Activation (or deactivation) in Heating ("Winter") mode (hold 5 seconds). If the unit operates in this mode, this mode must be deactivated before activating the other mode.

5.7 - 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

• Precautions:

- One conduit per fan.

- Be aware of condensation risks.

• Important:

- Max. available pressure:

- see max. operating limit curves (for intake grille, duct and outlet grille).

• The installation must comply to regulations concerning the technical rooms receiving equipment containing refrigerating fluids.

6 - STARTING

6.1 - CHECK:

• That all hydraulic connections are properly tightened and that the hydraulic system functions correctly:

- purge the circuits,

- position of valves,

- hydraulic pressure.

• That there are no leaks.

• That the machine is stable.

• That the power cables are well fixed to their connection terminals (loose terminals can cause heat build-up on the terminal board).

• That the electric cables are well insulated from any sections of sheet metal or metal parts which could damage them.

• That electrical wiring is a safe distance from refrigeration lines.

• That probe, control and power cables are properly separated.

• That the machine is earthed.

• That there are neither tools nor other foreign objects in the unit.

• IMPORTANT:

- If antifreeze is added (monopropylene glycol), a minium rate of 15% to 20% is needed to avoid any risk of corrosion.

- If the installation is equipped with an add-on furnace, make sure that the antifreeze used does not risk to this boiler.

- Do not use antifreeze in the case of the PMHRV with electric heating.

30 40 50 60 70 80 90

-20

-10

Outdoor

temperature (

Outlet grille

Intake grille

Ø 900

(or equivalent surface area)

(∆p. max. - intake grille pressure drop )

Minimum surface area for 20 Pa max.

Installation diagram

Reduction in refrigeration

capacity (%)

Increase in power consumption (%)

Power available according to the outside temperature Increase in power consumption Reduction in refrigeration capacity

Available pressure (Pa)

Operating limits

6.2 - STARTING-UP THE UNIT

• Power up the unit.

• Start the unit (the pump is controlled directly by the generator). See paragraph 7.5.

comp

x 100

PRG

mute

SEL

µchiller

15 2

349

• See wiring diagrams supplied with the machine.

7 - OPERATION OF µCHILLER ELECTRONIC CONTROL

7.1 - DELIVERY STATE

• The control unit is supplied fitted in the machine and factory pre-set.

• All the connections are made except those concerning the available signals or the options.

7.2 - PRINCIPLE

• The microprocessor controls the operation of the machine and of the associated alarms. It continuously compares the water temperature measured by a probe (S1) and the setpoint temperature value entered via the keyboard. Each operating request produced by the control unit is indicated by the light (6a) / (6b) (see below). This light flashes if a safety delay is in progress. It stays on when the compressor is operating.

• The control probe S1 is located on the water inlet in the factory.

1 Key for:

- Return to normal display/validation of parameters,

- Stopping audible alarm.

2 Key for:

- Incrementation of parameters.

3 Key for:

- Decrementation of parameters. 4 Key for access to parameters. 5 LED display .

6a Circuit A compressor on indicator light. 6b Circuit B compressor on indicator light.

7 Cooling light ("Summer"). 8 Heating light ("Winter") 9 Compressor operating hours x 100 light.

7.3 - PRESENTATION

7.3.1 - DISPLAY KEYBOARD

6.3 - CHECKS TO BE MADE

• Check that the rotation direction of the fan(s) and the pump is correct. If not, reverse 2 phases on the electrical power supply.

• Check HP and LP by passing the pressure tapping pipes through the hole provided (see page 3). Also check the amperages as per the start-up data sheet.

• Check water flow.

• Check control system operation.

• Water circuit pressure. NOTE: The hydraulic modules of the PMHRV models

are fitted with a safety pressure switch which prohibits the water circulation pump, and thus the unit, from operating should circuit pressure be insufficient (cut-off 0.6 bar, engagement 1.4 bar).

• Purge of the hydraulic circuit with special attention given to the pump.

Ø 1/4" blow through

Ø 1/4" draining

DISPLAY

KEYBOARD

µCHILLER

MICROPROCESSOR

CARD

Temperature probe

(for antifrost

protection, circuit A)

Temperature

probe S1

(for control)

Temperature

probe S4

(for antifrost

protection, circuit B)

DIGITAL INPUTS

ACTUATORS

24 VAC

SUPPLY

TRANSFORMER

Temperature

probe S3

(to defrost circuit A)

Temperature probe

(to defrost circuit B)

☞

µchiller

address 00 = 1 term. 01 = 2 term.

keypad

offon(0)

(1)

13 12 11 10

7.3.3 - MAIN INPUT/OUTPUT BOARD

7.3.4 - CDDITIONAL INPUT / OUTPUT BOARD (for the 2nd refrigerating circuit)

10 Connector for link with controller card. 11 Micro-switch for selection of number of display keyboards

connected:

00 = 1 keyboard (standard setting),

01 = 2 keyboards. 12 Buzzer enable micro-switch ("ON" as standard). 13 Keyboard enable micro-switch ("ON" as standard).

7.3.2 - POSITIONS OF THE MICRO-SWITCHES LOCATED AT THE BACK OF THE DISPLAY KEYBOARD

P3 P2

(*) 24 VAC supply. Contact open if fault.

DEFROSTING PROBE

ANTI-FREEZE PROBE

CONTROL PROBE

24 V SUPPLY

Fuse 5 x 20

Rating 2A

Relayed digital outputs

Ventilation analog output

Keyboard link connector

Green light indicating a correct link with the display keyboard

Red light flashing slowly in normal operation, quickly in the event of an alarm

Compressor

Alarm

Pump

Valve

Anti-freeze

Fan

3 2 1

REMOTE HEAT/COOL

REMOTE ON/OFF WATER FLOW SWITCH FAN THERMAL RELA Y

COMPRESSOR THERMAL RELAY

LOW PRESSURE

HIGH PRESSURE

COMMON

Digital

inputs

(*)

Bridge

ID11 ID10 ID9 ID8

B5 GND B4 GND

NC C NO

C NO

Y2 GND

24V

FAN THERMAL RELA Y

COMPRESSOR THERMAL RELAY

LOW PRESSURE

HIGH PRESSURE

Digital

inputs

(*)

DEFROSTING PROBE

ANTI-FREEZE PROBE

(*) The common comes is provided from the main board.

Ventilation analog output

Relayed digital outputs

Compressor

Valve

Anti-freeze

Connector

The following are connected to this board: B cooling circuitrelated inputs / outputs

Jumper

7.4 - OPERATING MODES

7.4.1 - COOLING MODE ("SUMMER")

7.3.5 - CTN TYPE TEMPERATURE PROBES

Temperature (°C)

-20

-10 0

10 20 25 30 40 50 60 70

Ohmic value (Ohm)

67,740 42,250 27,280 17,960 12,090 10,000

8,310 5,820 4,160 3,020 2,220

7.4.2 - HEATING MODE ("WINTER")

compressor

Water temperature

Cooling setpoint

Cooling

differential

• The PMHRV sare wired in the factory to operate in heating mode.

• The operating mode (heating/cooling) can be switched remotely by connecting two external contacts (see paragraph 4.2.5 for details):

-1 contact for stopping by remote control (contact open = off - contact closed = on),

-1 contact to change the mode (contact open = cooling - contact closed = heating).

• Note: An

automatic compressor permutation system enables operating time to be shared between the two units.

7.5 - STARTING

• Initial condition:

- Machine hydraulically and electrically connected ready to operate.

- The remote operating mode selection (Heating/ Cooling) is made.

- The remote On/Off selector is on "Off".

• Turn the installation on.

• The display comes on and shows the water temperature (read by the control probe S1).

• Place the remote On/Off selector on "On".

• The indicator lamp corresponding to the selected mode lights up:

- indicator lamp (7) : Cooling,

- indicator lamp (8) : Heating.

• The compressor "On" indicator lights (6a) and (6b) comes on if necessary (see diagram, paragraph 7.4). If the light flashes, it means that the compressor starting

is required but that a safety delay is in progress. This light stays on when the compressor has started.

• To shut down the unit, place the remote On/Off selector on "Off". The operating mode indicator lights (7) and (8) and the compressor operation light (6) go off.

CAUTION

Changing the operating mode (heating/cooling)

must only be done when the machine is stopped.

NOTE

The controller’s anti-short-cycle system requires that the compressor operate for a minimum time period.

If the machine should shut-down, the compressor(s) may continue to function for a certain amount of time (maximum 150 seconds).

compressor

Water temperature

Heating setpoint

Cooling

differential

7.6 - ADJUSTING AND DISPLAYING THE PARAMETERS

• Parameters accessible by pressing the SEL (4) key for 5 seconds.

• The display displays the code of the 1st parameter on the list ("r1" - see below).

• By pressing the ▲ (2) or ▼ (3) keys, scroll through the parameter codes until you reach the one you want.

• Press SEL (4) to find out the value of the corresponding parameter.

• The value of the parameter can if necessary be changed using the ▲ (2) and ▼ (3) keys.

• Press SEL (4) to re-display the parameter codes.

• To store the parameters which have been changed and to exit the adjustment procedure, press the PRG (1) key.

If during the adjustment procedure no key is pressed for 60 seconds (this period is indicated by the display flashing), the system automatically reverts to normal operation

PRG

mute

SEL

chiller

5 sec

and display without storing the latest parameter changes.

Code

Parameters Remarks

Factory

setting

Installation

setting

Adjustment

range

12 °C

2 K

45°C

5 K

10 to 25°C

0.1 to 11 K

25 to 45/50°C

0.1 to 11 K

Probe located on water return

Display only

Set point Cooling («Summer») Differential Cooling Set point Heating («Winter») Differential Heating Water exchanger temperature, circuit A (Probe S2 for anti-freeze) Water exchanger temperature, circuit B (Probe S4 for anti-freeze) Air exchanger temperature, circuit A (Probe S3 defrosting) Air exchanger temperature, circuit B (Probe S5 defrosting) Compressor hour meter, circuit A Compressor hour meter, circuit B Pump hour meter

r 1

r 2

r 3

r 4

r 6

r 7

r 8

r 9

c 9 c A c C

• The hour meters are zeroed by pressing simultaneously on the ▲ (2) and ▼ (3) keys.

NOTE:

• The configuration and settings of each machine is factory-set for optimal operation.

• Parameters can be adapted to suit special installations on request. Consult us.

comp

x 100

PRG

mute

SEL

µchiller

If light (9) is on, multiply the time displayed by 100.

RESET

7.7 - ALARMS

• When an alarm occurs:

- the bell rings (for 1 minute),

- the alarm report is activated (make-break dry contact 5 A resistive 250 VAC max.),

PRG mute

PRG

mute

SEL

chiller

- the display flashes and the alarm message appears cyclically (see table below),

- the machine stops if necessary (see table below).

• Stop the bell by pressing the key (1) .

• Remedy the fault.

IMPORTANT NOTE: Any work must be done by qualified, experienced person.

• The alarm is cancelled automatically when the fault is cleared.

PRG

mute

SEL

µchiller

RESET

NOTE:

- (*) Factory settings.

- (**) Cancellation of the fault on the motor circuit breaker.

- The alarms are not activated when the machine is off (except for probe and memory faults).

WATER OUTPUT ALARM CASE

• Reset the "water output" alarm manually by simultaneously pressing the ▲ (2) and ▼ (3) keys if the circulation pump control is used.

• At that moment:

- the alarm report is de-activated,

- the display reverts to normal (no flashing),

- the machine can re-start (if it was stopped).

SUMMARY TABLE OF ALARMS

Inhibition

delay

(*)

Threshold

(*)

Circuit

stop

Pump

stop

Cancellation

Report Remarks

Alarm

Message

Circuit

stop

Fault on probe 1 Fault on probe 2 (circuit A) Fault on probe 3 (circuit A) Fault on probe 4 (circuit B) Fault on probe 5 (circuit B)

Water flow rate

Circuit A H.P. Circuit A L.P.

Circuit A water heat exchanger frozen Compressor A maintenance

Circuit A thermal compressor

Circuit A thermal fan

Defrosting too long circuit A

Circuit B H.P. Circuit B L.P.

Circuit B water heat exchanger frozen Compressor B maintenance

Circuit B thermal compressor

Circuit B thermal fan

Defrosting too long circuit B

Memory error

Display link fault

Supply voltage too low

E1 E2

H1 L1 A1

H2 L2 A2

---

30" on start-up

10" in operation

---

150" on start-up

---

150" au dém.

---

Pressure switch Pressure switch

-1°C

10 000 h

Circuit breaker

10 mn

Pressostat Pressostat

-1°C

10 000 h

Circuit breaker

10 mn

---

Auto Auto

Auto

Manual

Auto Auto Auto

Manual

(**)

Manual

(**)

Auto

Auto Auto Auto

Manual

(**)

Manual

(**)

Auto

According to

seriousness

of fault

According to

seriousness

of fault

According to

seriousness

of fault

X X

X X X

---

According to seriousness

of fault

According to seriousness

of fault According to seriousness

of fault

X X

---

X X X

---

According to

seriousness

of fault

According to

seriousness

of fault

According to

seriousness

of fault

X X

X X X

---

X X X

---

Alarm enabled if pump running

Fan time delay stopped 1'

Alarm together with phase-sequence fault

Self-cancellation with correct defrosting cycle Fan time delay stopped 1'

Alarm together with phase-sequence fault

Self-cancellation with correct defrosting cycle After-sales department operation to renew parameters or change the electronics After-sales department operation After-sales department operation

---

According to seriousness

of fault

According to seriousness

of fault According to seriousness

of fault

7.8 - SPECIAL OPERATING FEATURES

7.8.1 - ANTI-FREEZE PROTECTION OF WATER HEAT EXCHANGER

•2 functions performed:

- control of a antifreeze heater,

- anti-freeze alarm stopping the machine.

• Operating diagram (see opposite). The setting of these thresholds can be changed in the

factory on request to suit the machine’s operating conditions.

7.8.2 - CIRCULATION PUMP CONTROL

• The pump is controlled as soon as the machine is started up.

• The pump stops when the machine is stopped (by remote control stop contact) after a time delay of 5 minutes (the time delay is active if the compressor has been running).

• NOTE:

- This signal is used directly on the PMHRV without electric heating to control pump of the hydraulic module.

For the models with electric heating, pump control is made by the control module placed in the electric heating box (see paragraph 5).

7.8.3 - POWER CUT

• If the power is cut to the control circuits, the electronic control unit returns to the operating mode it was in before the power was cut and the parameters are still stored in memory when the power is restored.

7.8.4 - FAN SPEEDS

• Supplied as standard, a thermostat (index B1) monitoring the ambient temperature enables the speed to be adapted in relation to this temperature.

• The thermostat is factory-set for optimal operation. For other settings, consult us.

• This device is not installed if a proportional pressure control device is used.

7.8.5 - REMOTE "µCHILLER" DISPLAY KEYBOARD (optional)

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

• See details in paragraph 5.2.3.

IMPORTANT NOTES:

• 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.

• For a PMHRV with auxiliary electric heating, start-up is made only by the remote On/Off and Heating/Cooling inversion signals and not by the display keypad.

7.8.6 - DEFROSTING (In heating mode only)

• The control is regulated to operate as follows:

- If the temperature detected by the sensor S3 or S5 is less than a given temperature (for at least 10 seconds), a defrosting operation is triggered (inversion of the refrigeration cycle and shut-down of the ventilation) unit the temperature read by S3 or S5 returns to a sufficient level. However, the duration of a de-icing phase is limited to 10 minutes. If de-icing is stopped by this time delay, alarm "r1" or "r2" appears on the display.

-A period of 40 minutes must pass before a new de-icing phase can start.

- The defrosting temperature levels are given in the commissioning documentation.

- For special operating conditions, it may be necessary to change these settings. In this case, contact the after sales service.

• NOTE:

- Message "d1" appears on the display during the defrosting phase.

- For units with 2 refrigerating circuits, defrosting is carried out independently on each of the circuits. An inhibition delay (10 min.) enables defrosting of the 2nd circuit to be delayed.

7.8.7 - CYCLE INVERSION VALVE

• The valve is actuated in heating mode.

2¡C1¡C-1¡C 0¡C 3¡C 4¡C

Freeze alarm

Resistor control

8 - MAINTENANCE

8.1 - PERIODIC CHECKS

• Carry out the following operations at least once a year

(the frequency depends on the installation and operating conditions):

IMPORTANT

Before carrying out any work on the machine, make sure that it is switched off and that access to it is prevented.

Any work must be carried out by personnel qualified and authorised to work on this type of machine.

GENERAL MAINTENANCE:

All equipment must be properly maintained in order to provide optimum performance over time. Faulty maintenance can result in the cancellation of the product guaranty. Depending on the products, maintenance operations consist in the cleaning of filters (air, water), internal and external exchangers, casings, and the cleaning and protection of condensate tanks. Treating odours and the disinfection of room surfaces and volumes also contributes to the cleanliness of the air breathed by users. TECHNIBEL proposes a wide range of perfectly adapted professional cleaning, maintenance and repair products for complete and efficient maintenance. For an optimum result, TECHNIBEL air-conditioners must be maintained with TECHNIBEL maintenance products.

- Cleaning the air exchanger.

- Checking the wear parts.

- Checking the operating set points and temperatures.

- Check the refrigerant circuit in accordance with the regulations in force.

- Checking the safety devices.

- De-dusting the electrical equipment cabinet.

- Checking that the electrical connections are secure.

- Checking the earth connection.

- Check for leaks.

- Check the operation and parameters as per the start-up data sheet.

- Check the hydraulic circuit in accordance with standard trade practices (output, pressure, purge the circuit and particularly the pump – see paragraph 6.3, filter cleaning).

- For models equipped with a hydraulic module, check that the safety valve operates correctly.

8.2 - REFRIGERANT CIRCUIT RECOMMENDATIONS

•A new filter dryer must be installed after all servicing operations performed on the refrigerant circuit.

8.2.1 - INSTALLATION AND MAINTENANCE

• During installation, troubleshooting and maintenance operations, the use of pipes as a step: under the stress, the pipe may rupture and the refrigerant may cause serious burns.

• During unit maintenance operations, the composition and the condition of the coolant will be checked, as well as the absence of all trace of refrigerant.

• During the unit's annual seal test, in accordance with the law, check that the high and low-pressure pressure controllers are correctly connected on the refrigerating circuit and that they disconnect the electrical circuit in case of tripping.

• During maintenance operations, make sure that there is no trace of corrosion or oil stains around the refrigerating components.

• Prior to all maintenance and servicing on the refrigerating circuit, one must first shut down the unit then wait a few minutes before installing temperature or pressure sensors. Certain equipment, such as the compressor and piping, may reach temperatures above 100°C and high pressures may lead to serious burns.

8.2.2 - TROUBLESHOOTING

• All maintenance and servicing operations on the refrigerating circuit must be conducted in accordance with standard trade practices and safety rules: recovery of the refrigerant, inert shielded (nitrogen) brazing, etc.

• All brazing operations must be conducted by qualified welders.

• For equipment charged with R407C, refer to the specific instructions in the installation manual.

• This unit is equipped with pressurized equipment, for example piping. Use only genuine parts listed in the spare parts list for replacing defective refrigeration components.

• Pipes may only be replaced by copper tubing in compliance with standard NF EN 12735-1.

• Leak detection, in the case of pressure testing:

- Never use oxygen or dry air, as the risk of fire or explosion is present

- Use dehydrated nitrogen or a nitrogen and refrigerant mix indicated on the manufacturer's plate

- The test pressure, low and high pressure, must not exceed 20 bar and 15 bar in the case where the unit is equipped with the pressure gauge option.

• All part replacement with other than genuine parts, all modifications of the refrigerating circuit, all replacement of refrigerant by a fluid other than that indicated on the manufacturer's plate, all use of the unit outside the application limits defined in the documentation, shall result in the cancellation of PED CE marking compliance which shall fall under the liability of the individual who carried out these modifications.

START-UP DATA SHEET

PMHRV µCHILLER PARAMETER SETTINGS Code: Standard application Serial Number: Started by: Company: Site: Date:

Code Description Unit Factory Setting

value

/ SENSOR

6 Sensor S1 calibration °C0 7 Sensor S2 calibration °C0 8 Sensor S3 calibration °C0 9 Sensor S4 calibration °C0 a Sensor S5 calibration °C0 b Digital filter 2

C Water inlet limit 12

d Unit of measure (0=°C / 1=°F) 0

START-UP DATA SHEET

PMHRV Range PMHRV 2044 to 2072 Code : Serial Number: Started by: Company: Site: Date:

Voltage measured on unit V L1-L2 L2-L3 L3-L1

FANS

Measured amperage, circuit A A/phase L1 L2 L3 Circuit breaker thermal setting A Measured amperage, circuit B A/phase L1 L2 L3 Circuit breaker thermal setting A

COMPRESSORS

Measured amperage, circuit A A/phase L1 L2 L3 Circuit breaker thermal setting A Measured amperage, circuit B A/phase L1 L2 L3 Circuit breaker thermal setting A

PUMP

Amperage A/phase L1 L2 L3 Circuit breaker thermal setting A

HEAD PRESSURE CONTROL

Setting

SENSORS (see control sheet)

Outdoor temperature Outdoor thermostat set point Water temperature control sensor positioned in: Inlet Outlet

TEMPERATURES (

°C) / PRESSURES (bar)

Outside temperature Water type Pure Glycol % Glycol Water inlet, generator Water outlet, generator Water circuit pressure Water flow rate ∆ T :

Circuit A Circuit B

Suction, compressor Discharge, compressor Inlet, thermostatic expansion valve Outlet, thermostatic expansion valve Condensing pressure Evaporating pressure Superheating = (Compressor suction temperature - Evaporating temperature) = 7 to 8°C

Sub-cooling = (Condensating temperature - Expansion valve inlet temperature) = 3 to 5°C

Code Description Unit Factory Setting

value

r REGULATOR

1 Summer set point (cooling) °C12 2 Summer differential (cooling) °C2 3 Winter set point (heating) °C45 4 Winter differential (heating) °C5 5 Compressor change-over (0 = authorised) 0

A Min. summer set point (cooling) °C10

b Max. summer set point (cooling °C25

C Min. winter set point (heating) °C25

d Max. winter set point (heating) °C 45/50(*) / 48(**)

c COMPRESSOR

1 Min. run time s 150 2 Min down time 10 s 5 3 Time between two start-ups 10 s 30 42

compressor start-uptime delay s 10

compressor shut-down time delay s 0 6 Start-up time delay at power up s 0 7 Compressor start-up delay after pump start-up s 30 8 Pump shut-down time delay after machine shut-down mn 5 b Maintenance alarm threshold h x 100 100

F FAN

1 Fan output activation 1 2 Operating mode

(0 = always ON; 1 = coupled to compressor; 2 = on-off control; 3 = proportional control)

1 3 Min. voltage, output (On/Off module control) 0 4 Max. voltage, output (On/Off module control) 166

d DEFROSTING

1 Activation (0 = no / 1 = yes) 1 2 Mode (0 = time / 1 = temperature) 1 3 Defrost start temperature °C -6.5/-3 (*)

Defrost start pressure bar

4 Defrost end temperature °C 5/15(*) / 10(**)

Defrost end pressure bar 5 Min. time for triggering defrost s 10 6 Min. defrost duration time s 0 7 Max. defrost duration time mn 10 8 Delay between 2 defrost operations mn 40 9 Delay defrost 2

circuit mn 10

A End defrost contact activation 0

b Heating activation during defrosting 0 c Complete stop time defrost start mn 0 d Complete stop time defrost end mn 0

E End defrost with 2 refrig. circuits and 1 fan 0

A ANTIFREEZE

1 Antifreeze alarm threshold °C-1 2 Antifreeze alarm differential °C2 3 Antifreeze alarm restraint time delay at start-up s 0 4 Antifreeze resistance triggering threshold °C2 5 Antifreeze resistance differential °C2

P ALARM

1 Water output alarm restraint time delay at pump start-up s 30 2 Water output alarm restraint time delay while in operation s 10 3 LP alarm restraint time delay at compressor start-up s 150 4 Siren duration mn 1 5 Alarms reset (1 = auto) 1

H GENERAL

1 Machine model (heat pump) 3 2 Number of fans (1 = 2 fans) 1 3 Number of evaporators (1 = 2 circuits) 1 4 Multi-pressure compressor 0 5 Pump operating mode 1 6 Remote summer/winter changeover (0=no / 1=yes) 0/1 7 Remote on/off control (0=no / 1=yes) 0/1 8 Number of user keyboards 0 9 Keyboard authorization 1

A Series address 1

b Remote control password 0

* For PMHRV 2044

** For PMHRV 2050

9 - PRESSURE CURVES

9.1 - REFRIGERANT PRESSURE

LOW PRESSURE

HIGH PRESSURE

6 789101112 13 14 15

25°C 15°C

35°C

45°C

3.8

4.2

4.6

5.0

5.4

5.8

6.2

6 7891011 12 13 14 15

25°C 15°C

35°C

45°C

6 7891011 12 13 14 15

25°C 15°C

35°C

45°C

6 7891011 12 13 14 15

25°C 15°C

35°C

45°C

High pressure (relative bar)

Water outlet temperature (°C)

Low pressure (relative bar)

Water outlet temperature (°C)

Outdoor temperature (°C)

PMHRV

2044

High pressure (relative bar)

Water outlet temperature (°C)

PMHRV

2050

Low pressure (relative bar)

Water outlet temperature (°C)

Outdoor temperature (°C)

8101214161820

25°C 15°C

35°C

45°C

3.5

4.5

5.5

6.5

8101214161820

25°C 15°C

35°C

45°C

3.5

4.5

5.5

6.5

6 7891011 12 13 14 15

25°C 15°C

35°C

43°C

6 7891011 12 13 14 15

25°C 15°C

35°C

43°C

High pressure (relative bar)

Water outlet temperature (°C)

PMHRV

2064

Low pressure (relative bar)

Water outlet temperature (°C)

Outdoor temperature (°C)

High pressure (relative bar)

PMHRV

2072

Low pressure (relative bar)

Outdoor temperature (°C)

Water outlet temperature (

°C)Water outlet temperature (°C)

9.2 - HEATING PRESSURE

LOW PRESSURE

HIGH PRESSURE

-12 -10

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

35°C

50°C 45°C

-12 -10

1.5

2.5

3.5

4.5

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

35°C

50°C 45°C

-10 -5 0 5 10 15

35°C

50°C 45°C

-10 -5 0 5 10 15

1.5

2.5

3.5

4.5

35°C

50°C 45°C

-10 -5 0 5 10 15

35°C

50°C 45°C

-10 -5 0 5 10 15

35°C

50°C 45°C

-10 -5 0 5 10 15

35°C

50°C 45°C

-10 -5 0 5 10 15

35°C

50°C 45°C

High pressure (relative bar)