Vallox 252 M User Manual

TECHNICAL SPECIFICATION

VALLOX-product code:

VALLOX 252 M

HVAC code:

VALLOX 252 M

3158500 L 3158510 R

7911076 L

7911077 R

PRESSURE DIFFERENCE SWITCH (OPTIONAL)

SOUND ATTENUATOR (OPTIONAL) IVALLOX 252

VALLOX 252 M

WATER OPERATED POSTHEATING UNIT (OPTIONAL)

ELECTRICAL POST-HEATING UNIT (OPTIONAL)

MANUAL CONTROL CENTER

REMOTE MONITORING CONNECTION

ELECTRICAL PREHEATER (OPTIONAL)

Supply air Discharge air

Supply air

Discharge air

210 dm

3

/s 100 Pa

230 dm

3

/s 100 Pa

2 heat recovery cells,

η>70 %

Manual or remote monitoring control 2,5 kW 11 A 2,5 kW 11 A Approx. 5kW EU 3 EU 7 EU 3 EU 5 210 kg

2x230 W 1 A 2x230 W 1 A

Fans

Heat recovery Heat recovery bypass Preheater Electric post-heating unit Water post-heating unit Filters

– manual control (manual control unit) – remote monitoring control – sound attenuator – preheater – electric post-heating unit – water post-heating – pressure difference switch unit

Ventilation adjustment options

Options

Power supply 230 V, 50 Hz, (230 V / 400 V)

13,9 A (+preheater 10,9 A)

Protection class IP 34

Weight/basic unit

VALLOX 252 M

OPERATING PRINCIPLE OF THE VENTILATION UNIT

Sound attenuator unit

2

Installed above the unit

Models: VALLOX 252 M L VALLOX 252 M R

VALLOX 252 M removes contaminated air and replaces it with filtered and heated outdoor air.

Efficient filtering of outdoor air (EU3 + EU7) prevents harmful particles from entering the ductwork and rooms via the unit. Good filtering of discharge air (EU3 + EU5) diminishes the contamination of the unit and ensures effective operation of heat recovery and the discharge air fans. Clogging of the filters and the ductwork can be monitored if the unit is equipped with pressure difference switches.

With efficient 2-step heat recovery, most of the heat of contaminated discharge air can be transmitted to outdoor air coming inside. The efficiency of the heat recovery cells is approx. 70%, or 75...80% if supply air fan heat is taken into account. If outdoor air does not get sufficiently warm in the heat recovery cells, it is possible to use an (optional) heating unit operated by water or electricity.

In the summertime, needless heating of outdoor air can be avoided with the heat recovery bypass function, operated either manually or by remote control.

The automatic defrosting of the heat recovery cells intermittently stops the supply air fans when the temperature of discharge air goes under the pre-set threshold value. To avoid or to decrease the stopping of the supply air fans, supply air can be heated with an electrical preheater. If the unit is equipped with a preheater, defrosting starts when outdoor air temperature goes below ca. -15/-25°C (max./min. supply air stream). Without preheating, the operation starts when outdoor air temperature falls below ca. -5°C.

VALLOX 252 M can be operated with the manual control unit contained in the delivery. With the manual control unit, you can select the min. or max. ventilation power, and stop the unit. The control unit also features a heat recovery bypass switch. The manual control unit cannot be used in remote monitoring control.

In remote monitoring, you can stop the unit, and adjust three different power positions (min, half, max). Heat recovery bypass can also be controlled in remote monitoring. Control voltage in remote monitoring is 24 VAC.

The unit gives potential-free signals of operation modes of the selected power positions and the optionally installed pressure difference switches of the ductwork.

The unit can supply control voltage (24VAC) to separate damper motors of the outdoor air and extract air ducts. This control voltage is switched off when the unit is stopped. The function can be used in both manual and remote monitoring control.

The separate damper motors are not included in the delivery.

2370

665

220

1100

187

222

282

222

187

1000

1370

Ø 250 Pcs.

VALLOX M 252-R

= EXTRACT AIR = DISCHARGE AIR = SUPPLY AIR = OUTDOOR AIR

VALLOX 252 M-L

= OUTDOOR AIR = SUPPLY AIR = DISCHARGE AIR = EXTRACT AIR

Main parts

Optional equipment

12

13

14

1

2

3

5

6

7

8

9

1010

4

11

Post-heating unit

• water operated or electrical Preheater

• electrical Pressure difference switch unit

187

2

0

222

1100

187

222

282

1370

2

0

(Door and insulation 55 mm)

Ø

2

5

0

4

P

cs.l

61

0

+

*

14

6

1

4

5

8

12

10

11

7

13

3

9

2

A

B

C

D

Supply air fans

Discharge air fans

Heat recovery cells

Heat recovery bypass

Supply air filter EU7

Discharge air filter EU5

Discharge air filter EU3

Outdoor air filter EU3

Condensing water reservoir

Condensing water outlet

Electrical connection lead-throughs

A

B C D

A

B C D

Internal outlet collar

* detachable inner coupling

VALLOX 252 M

PERFORMANCE

VALLOX 252 M VALLOX 252 M

Measuring Points

VALLOX 252 M with Sound Attenuator Measuring Points

VALLOX 252 M with Sound Attenuator

FAN CAPACITY

Fan curves: P = discharge air fan, T = supply air fan

Measuring points after the outlet collar. Fan curves indicate the total pressure

available for duct losses.

Measuring points after the outlet collar. Fan curves indicate the total pressure

available for duct losses.

1 2 3 4 5 6 7 8

Fan

speeds

90 100 110 130 140 160 200 230

Control voltage

V

200 230 275 350 390 450 590 675

Input

power

W

3

1 2 3 4 5 6 7 8

90 100 110 130 140 160 200 230

200 230 275 350 390 450 590 675

74 85

99 127 143 170 206 220

Pressure loss in ducts. Total pressure

Suositeltava toiminta-alue

80

95 110 135 150 175 205 230

Air flow

l/s

FAN CAPACITY

Pressure loss in ducts. Total pressure

Volume flow rate

Fan curves: P = discharge air fan, T = supply air fan

Recommended operating range

Volume flow rate

Recommended operating range

Supply air Discharge air

P

Supply air Discharge air

Model L

Fan

speeds

Control voltage

V

Input

power

W

Air

flow

l/s

Model L

T

• Sound power levels in the ducts measured in accordance with the standard ISO/DIS 5135:1995.

• Sound pressure levels in the room (10 m2 sound absorption) determined according to the regulation 4873/531/84 issued by the Finnish Ministry of Environmental Affairs

LwA = A-weighted sound pressure level * = difference between sound power level and pressure level when unit location and total absorption area are taken into account (in a classroom, for instance, t.ex. L

w

A -* = 12 dB)

LpA, dB(A)

63

125

250

500

1000

2000

4000

8000

Lw, dB

LwA dB(A)

Hz

LwA, dB(A)

LpA = A-weighted sound pressure level (10 m

2

sound absorption)

Sound power level from VALLOX to supply

air ducts by octave band Lw, dB

Medium frequency of the octave band, Hz

CONTROL POSITION / AIR FLOW

Sound power level from VALLOX to

discharge air ducts by octave band Lw, dB

CONTROL POSITION / AIR FLOW

63

125

250

500

1000

2000

4000

8000

Lw, dB

LwA dB(A)

Hz

Sound power level coming from VALLOX through

the envelope to the rooms where the unit has

been installed

CONTROL POSITION / l/s

LpA, dB(A)

Sound power level from VALLOX to supply

air ducts by octave band Lw, dB

CONTROL POSITION / AIR FLOW

Sound power level from VALLOX to

discharge air ducts by octave band Lw, dB

CONTROL POSITION / AIR FLOW

Medium frequency of the octave band, Hz

Sound power level coming from VALLOX through

the envelope to the rooms where the unit has

been installed

CONTROL POSITION / l/s

VALLOX 252 M

SOUND VALUES

2

4

VALLOX 252

with Sound Attenuator

6

169l/s

68.0

63.5

61.0

49.5

47.0

45.0

35.0

27.0

70.0

55.5

4

129/139

40

6

166/176

44

8

212/217

47

VALLOX 252 M

8

226 l/s

74.5

72.0

66.0

52.0

49.5

38.0

31.0

77.0

61.0

6

179/s

72.0

68.5

61.0

48.0

45.0

34.0

27.0

74.0

57.0

4

141 l/s

68.5

66.0

57.0

43.5

38.5

28.5

18.5

70.5

53.5

1

85 l/s

63.0

59.0

47.5

36.5

36.0

28.0

15.5

64.5

45.0

8

208 l/s

69.5

67.0

64.5

54.5

50.0

39.5

32.0

72.0

59.0

4

138 l/s

65.5

60.0

55.5

44.5

43.5

38.5

20.0

66.5

50.5

30.0

1

76l/s

62.0

55.0

48.0

36.0

38.5

28.5

20.0

63.0

44.0

1

78/85

33

8

204 l/s

67.0

65.0

51.5

36.5

30.0

27.0

18.5

69.0

49.5

6

167 l/s

63.0

62.5

48.0

31.0

24.5

20.5

65.5

46.5

4

135 l/s

59.5

59.0

43.0

25.5

17.0

62.5

42.5

1

80/s

55.5

53.5

34.0

57.5

37.0

8

209 l/s

66.5

62.5

50.5

41.5

32.0

27.0

15.5

68.0

48.0

6

169l/s

63.0

60.0

46.5

35.0

25.0

19.0

65.0

44.5

4

133 l/s

61.0

57.5

40.5

27.5

16.0

62.5

41.0

1

77 l/s

55.0

52.0

33.0

18.0

13.5

14.0

57.0

35.5

4

131/138

42.5-*

38.5

6

167/175

47-*

43

8

208/221

50.5-*

46.5

1

74/82

36-*

32

VALLOX 252 M

WATER RADIATOR PERFORMANCE

Pressure Loss in the Water Radiator

5

Water Radiator Output

Temperature of water entering the radiator (tv) 70 ˚C

Temperature of air entering the radiator (ti)15 ˚C

Temperature of water entering the radiator (tv) 55 ˚C

Temperature of air entering the radiator (ti)15 ˚C

Cooling of water in the radiator ˚C

Water flow dm

3

/s

Total output of the radiator kW

Cooling of water in the radiator ˚C

Water flow dm

3

/s

Total output of the radiator kW

Air flow dm

3

/s

Air flow dm

3

/s

Total pressure loss kPa

The recommended area of operation is ruled. Determined for 100% water.

Water flow

dm3/s

dm

3

/h

Radiator + valve (KVS 1.0)

Radiator

VALLOX 252 M

CONTROL DIAGRAM VALLOX 252 M - MANUAL CONTROL

2

6

Control Diagram VALLOX 252 M - MANUAL CONTROL UNIT

Distribution Panel

2x16A if equipped with a preheater

Internal electrical and control connections

Post-heating

unit, electric

Preheater,

electric

Sound attenuator

Manual control unit

VENTILATION ZONE

VALLOX 252 M

7

Heat Recovery Defrosting

The TS5 temperature thermostat directs the operation of the preheater (LP1) on the basis of the measurement data supplied by the temperature sensor, preventing the risk of freezing and the stopping of the supply air fan (TF). If the capacity of the preheater (LP1) is not sufficient, or if there is no preheater, the TS1 defrosting thermostat of the heat recovery cells stops the TF supply air fan on the basis of the measuring data on the temperature sensor, thereby preventing the heat recovery cell from freezing. As soon as the risk of frosting passes, the fan restarts automatically. The threshold temperature for defrosting (-2...+6 ˚C) and the difference area (2 ˚C) can be set on the thermostat.

Overheating Protection of the Heating Unit

Overheat protection thermostats TZ1 and TZ2 monitor the surface temperature in the LP1 and LP2 heating units. If surface temperature exceeds the threshold, overheat protection is triggered and power supply to the heating unit is stopped. The TZ1 overheating protector is reset automatically, and the TZ2 protector manually.

Damper Motors of the Outdoor and/or Extract Air Ducts

The spring return damper motors (24VAC) that may be installed outside the ventilation unit, in the outdoor or extract air ducts, can be controlled with control voltage (24 VAC) coming from the ventilation unit: when the ventilation unit is stopped, also the control voltage fed from the unit is stopped.

Control of Operation

The ventilation unit can be stopped by the fan speed switch on the manual control unit.

Fan Speed Adjustment

The users can control the fan capacity of the ventilation unit in two steps using the speed selection switch on the manual control unit (H) in the ventilation zone.

Supply Air Temperature

The control / adjustment center of the unit directs the operation of the post-heating unit (LP2) on the basis of the measuring data on the sensor of the TS2 temperature thermostat, aiming at keeping supply air temperatu-

re at the temperature value set with the TS2 thermostat (10....25 C).

Heat Recovery Bypass

Heat recovery can be bypassed using the Summer / Winter switch on the manual control unit (H). When the switch is in the Winter position, heat recovery is on. The Summer position bypasses heat recovery and deactivates the preheater (LP1), if used, and the post-heating unit (LP2).

DESCRIPTION OF OPERATION VALLOX 252 M - MANUAL CONTROL UNIT

Parts List

Code Name Technical details Equip- Delivery

(factory settings in parentheses) Note! ment responsibility

FG Damper motor Automatic heat recovery bypass 24V, 2W, 8Nm Standard X IU H Manual control unit Fan speed adjustment,

control of heat recovery bypass Standard X IU LP1 Preheater Electric radiator 2.5kW Options IU LP2 Post-heating unit Electric radiator 2.5kW Options IU LTO1 Heat recovery cells 2-step,

= 70 % Standard X IU LTO2 PF Discharge air fan qv = 230 dm3/s (100Pa) Standard X IU SU Filter Supply air EU7, discharge air EU5 Standard X IU TS1 Temperature thermostat Discharge air temperature

Heat recovery defrosting Adjustment range -2...6 ˚C (2) Standard X IU

TS2 Temperature thermostat Supply air temperature Standard X IU

Post-heating, electric

TS5 Temperature thermostat Discharge air temperature

Preheating, electric Adjustment range -0...8 ˚C (2) Standard X IU TF Supply air fan qv = 210 dm3/s (100Pa) Standard X IU TZ1 Overheat protector of the electric radiator Automatic reset (+60 ˚C) Included in LP1 / LP2 IU TZ2 Overheat protector of the electric radiator Manual reset (+95 ˚C) Included in LP1 / LP2 IU FGU Damper motor Damper motor in the outdoor air duct

(spring return) 24VAC IU

FGJ Damper motor Damper motor in the extract air duct

(spring return) 24VAC IU

VALLOX 252 M

CONTROL DIAGRAM VALLOX 252 M VKL - MANUAL CONTROL UNIT

2

8

Control Diagram VALLOX 252 M VKL MANUAL CONTROL UNIT

Distribution

Internal electrical and control connections

Post-heating unit (water

circulation)

Preheater,

electric

Sound attenuator

Manual control unit

VENTILATION ZONE

VALLOX 252 M

9

Heat Recovery Defrosting

The TS5 temperature thermostat directs the operation of the preheater (LP1) on the basis of the measurement data supplied by the temperature sensor, preventing the risk of freezing and the stopping of the supply air fan (TF). If the capacity of the preheater (LP1) is not sufficient, or if there is no preheater, the TS1 defrosting thermostat of the heat recovery cells stops the TF supply air fan on the basis of the measuring data on the temperature sensor, thereby preventing the heat recovery cell from freezing. As soon as the risk of frosting passes, the fan restarts automatically. The threshold temperature for defrosting (-2...+6 ˚C) and the difference area (2 ˚C) can be set on the thermostat.

Overheating Protection of the Heating Unit

Overheat protection thermostats TZ1 and TZ2 monitor the surface temperature in the LP1 heating unit. If surface temperature exceeds the threshold, overheat protection is triggered and power supply to the heating unit is stopped. The TZ1 overheating protector is reset automatically, and the TZ2 protector manually.

Damper Motors of the Outdoor and/or Extract Air Ducts

The spring return damper motors (24VAC) that may be installed outside the ventilation unit, in the outdoor or extract air ducts, can be controlled with control voltage (24 VAC) coming from the ventilation unit: when the ventilation unit is stopped, also the control voltage fed from the unit is stopped.

Control of Operation

The ventilation unit can be stopped by the fan speed switch on the manual control unit.

Fan Speed Adjustment

The users can control the fan capacity of the ventilation unit in two steps using the speed selection switch on the manual control unit (H) in the ventilation zone.

Supply Air Temperature

A regulating valve (not included in the VALLOX 252 M delivery) directs the operation of the LP2 post-heating unit on the basis of the measurement data given by the thermostat sensor in the supply air duct. The aiming is to keep supply air temperature at the temperature value set with the regulating valve (10...25 ˚C)

Heat Recovery Bypass

Heat recovery can be bypassed using the Summer / Winter switch on the manual control unit (H). When the switch is in the Winter position, heat recovery is on. The Summer position bypasses heat recovery and deactivates the preheater (LP1), if preheating is used.

DESCRIPTION OF OPERATION VALLOX 252 M VKL MANUAL CONTROL UNIT

Parts List

Code Name Technical details Note! Equip- Delivery

(factory settings in parentheses) ment responsibility

FG Damper motor Automatic heat recovery bypass 24V, 2W, 8Nm Standard X IU H Manual control unit Fan speed adjustment,

control of heat recovery bypass Standard X IU LP1 Preheater Electric radiator 2.5kW Options IU LP2 Post-heating unit Water radiator 5kW, 70/50 ˚C Options IU LTO1 Heat recovery cells 2-step,

= 70 % Standard X IU LTO2 PF Discharge air fan qv = 230 dm3/s (100Pa) Standard X IU SU Filter Supply air EU7, discharge air EU5 Standard X IU SV Regulating valve Self-operating radiator thermostat Not included in the

ventilation unit delivery

TS1 Temperature thermostat Discharge air temperature

Heat recovery defrosting Adjustment range -2...6 ˚C (2) Standard X IU

TS5 Temperature thermostat Discharge air temperature

Preheating, electric Adjustment range -0...8 ˚C (2) Standard X IU TF Supply air fan qv = 210 dm3/s (100Pa) Standard X IU TZ1 Overheat protector of the electric radiator Automatic reset (+60 ˚C) Included in LP1 / LP2 IU TZ2 Overheat protector of the electric radiator Manual reset (+95 ˚C) Included in LP1 / LP2 IU FGU Damper motor Damper motor in the outdoor air duct

(spring return) 24VAC IU

FGJ Damper motor Damper motor in the extract air duct

(spring return) 24VAC IU

VALLOX 252 M

CONTROL DIAGRAM VALLOX 252 M REMOTE MONITORING CONTROL

2

10

Control Diagram VALLOX 252 M REMOTE MONITORING CONTROL

Distribution Panel

Internal electrical and control connections

Post-heating

unit, electric

Preheater,

electric

VENTILATION ZONE

2x16A if equipped with a preheater

Pressure

unit

Pressure

unit

Sound attenuator

Remote monitoring center of the property

Alarm

Operation mode

Control

Measurement

Adjustment

VALLOX 252 M

11

Heat Recovery Defrosting

The TS5 temperature thermostat directs the operation of the preheater (LP1) on the basis of the measurement data supplied by the temperature sensor, preventing the risk of freezing and the stopping of the supply air fan (TF). If the capacity of the preheater (LP1) is not sufficient, or if there is no preheater, the TS1 defrosting thermostat of the heat recovery cells stops the TF supply air fan on the basis of the measuring data on the temperature sensor, thereby preventing the heat recovery cell from freezing. As soon as the risk of frosting passes, the fan restarts automatically. The threshold temperature for defrosting (-2…+6 ˚C) and the difference area (2 ˚C) can be set on the thermostat.

Overheating Protection of the Heating Unit

Overheat protection thermostats TZ1 and TZ2 monitor the surface temperature in the LP1 and LP2 heating units. If surface temperature exceeds the threshold, overheat protection is triggered and power supply to the heating unit is stopped. The TZ1 overheating protector is reset automatically, and the TZ2 protector manually.

Damper Motors of the Outdoor and/or Extract Air Ducts

The spring return damper motors (24VAC) that may be installed outside the ventilation unit, in the outdoor or extract air ducts, can be controlled with control voltage (24 VAC) coming from the ventilation unit: when the ventilation unit is stopped, also the control voltage fed from the unit is stopped.

Alarms

The PDS1 and PDS2 pressure difference switches monitor the pressure difference on the supply and discharge air sides. If the pressure difference grows too large because of dirty filters or clogged ducts, remote monitoring receives potential free operation mode information from the unit.

Control of Operation

If needed, the ventilation unit can be stopped by controlling the contactors in the unit (Min., 1/2, Max.) or by controlling power supply via the contactor in the distribution panel.

Fan Speed Adjustment

The ventilation unit can feed control voltage (24VAC) to the remote monitoring center, and the remote monitoring center can then direct the fan capacity of the ventilation unit in three steps according to the control signal (24VAC) received by the Min., 1/2, and Max. contacts in the connection box. Remote monitoring receives potential free operation mode information on the mode selected (Min., 1/2, Max.).

Supply Air Temperature

The control / adjustment center of the unit directs the operation of the post-heating unit (LP2) on the basis of the measuring data on the sensor of the TS2 temperature thermostat, aiming at keeping supply air temperature at the temperature value set with the TS2 thermostat (10…25 ˚C).

Heat Recovery Bypass

With the help of control voltage (24VAC) fed from the ventilation unit to the remote monitoring center and its control functions, the heat recovery bypass function can be directed according to the control signal (24 VAC) received by the NC contact in the connection box. When heat recovery bypass is activated, the preheater (LP1), if used, and the post-heating unit (LP2) are deactivated.

DESCRIPTION OF OPERATION DIAGRAM VALLOX 252 M REMOTE MONITORING CONTROL

Parts List

Code Name Technical details Equip- Delivery

(factory settings in parentheses) Note! ment Responsibility

FG Damper motor Automatic heat recovery bypass 24V, 2W, 8Nm Standard X IU LP1 Preheater Electric radiator 2.5kW Options IU LP2 Post-heating unit Electric radiator 2.5kW Options IU LTO1 Heat recovery cells 2-step,

= 70 % Standard X IU LTO2 PDS1 Pressure difference switch Adjustment range 0...500Pa (420)

Pressure guard for supply air Options IU

PDS2 Pressure difference switch Adjustment range 0...500Pa (420)

Pressure guard for discharge air Options IU PF Discharge air fan qv = 230 dm3/s (100Pa) Standard X IU SU Filter Supply air EU7, discharge air EU5 Standard X IU TS1 Temperature thermostat Discharge air temperature

Heat recovery defrosting Adjustment range -2...6 ˚C (2) Standard X IU TS2 Temperature thermostat Supply air temperature

Post-heating, electric Standard X IU TS5 Temperature thermostat Discharge air temperature

Preheating, electric Adjustment range -0...8 ˚C (2) Standard X IU TF Supply air fan qv = 210 dm

3

/s (100Pa) Standard X IU TZ1 Overheat protector of the electric radiator Automatic reset (+60 ˚C) Included in LP1 / LP2 IU TZ2 Overheat protector of the electric radiator Manual reset (+95 ˚C) Included in LP1 / LP2 IU FGU Damper motor Damper motor in the outdoor air duct

(spring return) 24VAC IU

FGJ Damper motor Damper motor in the extract air duct

(spring return) 24VAC IU

VALLOX 252 M

CONTROL DIAGRAM VALLOX 252 M VKL REMOTE MONITORING CONTROL

2

12

Control Diagram VALLOX 252 M VKL MANUAL CONTROL UNIT

Distribution Panel

Internal electrical and control connections

Post-heating unit,

water

Preheating

electric

Ventilation zone

Pressure

switch

REMOTE MONITORING CONTROL CENTER OF THE PROPERTY

Alarm

Operation mode

Control

Measurement

Adjustment

Sound attenuator

Pressure

switch

VALLOX 252 M

13

Heat Recovery Defrosting

The TS5 temperature thermostat directs the operation of the preheater (LP1) on the basis of the measurement data supplied by the temperature sensor, preventing the risk of freezing and the stopping of the supply air fan (TF). If the capacity of the preheater (LP1) is not sufficient, or if there is no preheater, the TS1 defrosting thermostat of the heat recovery cells stops the TF supply air fan on the basis of the measuring data on the temperature sensor, thereby preventing the heat recovery cell from freezing. As soon as the risk of frosting passes, the fan restarts automatically. The threshold temperature for defrosting (-2…+6 ˚C) and the difference area (2 ˚C) can be set on the thermostat.

Overheating Protection of the Heating Unit

Overheat protection thermostats TZ1 and TZ2 monitor the surface temperature in the LP1 heating unit. If surface temperature exceeds the threshold, overheat protection is triggered and power supply to the heating unit is stopped. The TZ1 overheating protector is reset automatically, and the TZ2 protector manually.

Damper Motors of the Outdoor and/or Extract Air Ducts

The spring return damper motors (24VAC) that may be installed outside the ventilation unit, in the outdoor or extract air ducts, can be controlled with control voltage (24 VAC) coming from the ventilation unit: when the ventilation unit is stopped, also the control voltage fed from the unit is stopped.

Alarms

The PDS1 and PDS2 pressure difference switches monitor the pressure difference on the supply and discharge air sides. If the pressure difference grows too large because of dirty filters or clogged ducts, remote monitoring receives potential free operation mode information from the unit.

Control of Operation

If needed, the ventilation unit can be stopped by controlling the contactors in the unit (Min., 1/2, Max.) or by controlling power supply via the contactor in the distribution panel.

Fan Speed Adjustment

The ventilation unit can feed control voltage (24VAC) to the remote monitoring center, and the remote monitoring center can then direct the fan capacity of the ventilation unit in three steps according to the control signal (24VAC) received by the Min., 1/2, and Max. contacts in the connection box. Remote monitoring receives potential free operation mode information on the mode selected (Min., 1/2, Max.).

Supply Air Temperature

A regulating valve (not included in the VALLOX 252 delivery) directs the operation of the LP2 post-heating unit on the basis of the measurement data given by the thermostat sensor in the supply air duct. The aiming is to keep supply air temperature at the temperature value set with the regulating valve (10…25 ˚C).

Heat Recovery Bypass

With the help of control voltage (24VAC) fed from the ventilation unit to the remote monitoring center and its control functions, the heat recovery bypass function can be directed according to the control signal (24 VAC) received by the NC contact in the connection box. When heat recovery bypass is activated, the preheater (LP1), if used, and the post-heating unit (LP2) are deactivated.

DESCRIPTION OF OPERATION VALLOX 252 M VKL REMOTE MONITORING CONTROL UNIT

Parts List

FG Damper motor Automatic heat recovery bypass 24V, 2W, 8Nm Standard X IU LP1 Preheater Electric radiator 2.5kW Options IU LP2 Post-heating unit Water radiator 5kW, 70/50oC Options IU LTO1 Heat recovery cells 2-step,

= 70 % Standard X IU LTO2 PDS1 Pressure difference switch Adjustment range 0...500Pa (420) Options IU

Pressure guard for supply air

PDS2 Pressure difference switch

Pressure guard for discharge air Adjustment range 0...500Pa (420) Options IU

PF Discharge air fan qv = 230 dm

3

/s (100Pa) Standard X IU SU Filter Supply air EU7, discharge air EU5 Standard X IU SV Regulating valve Self-operating radiator thermostat Not included in the

ventilation unit delivery

TS1 Temperature thermostat Discharge air temperature

Heat recovery defrosting Adjustment range -2...6 ˚C (2) Standard X IU

TS5 Temperature thermostat Discharge air temperature

Preheating, electric Adjustment range -0...8 ˚C (2) Standard X IU

TF Supply air fan qv = 210 dm

3

/s (100Pa) Standard X IU TZ1 Overheat protector of the electric radiator Automatic reset (+60 ˚C) Included in LP1 / LP2 IU TZ2 Overheat protector of the electric radiator Manual reset (+95 ˚C) Included in LP1 / LP2 IU FGU Damper motor Damper motor in the outdoor air duct

(spring return) 24VAC IU

FGJ Damper motor Damper motor in the extract air duct

(spring return) 24VAC IU

Code Name Technical details Equip- Delivery

(factory settings in parentheses) Note! ment Responsibility

VALLOX 252 M

MOUNTING INSTRUCTIONS

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14

VALLOX 252 M-R

= EXTRACT AIR = DISCHARGE AIR = SUPPLY AIR = OUTDOOR AIR

VALLOX 252 M L

= OUTDOOR AIR = SUPPLY AIR = DISCHARGE AIR = EXTRACT AIR

Sleeves with draught-limiters (PK 16) Condensing water outlet Condensing water reservoir Socle

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2

3

4

VALLOX Condensing Water Connections

• The water condensing from discharge air going through the unit can be removed from the bottom tank in two ways.

• When discharge air humidity is great, as in the bathroom, the condensing water is led via the screw-type hose coupling and through the condensing water outlet (water seal and hose) delivered with the unit to the floor drain.

• When discharge air humidity is low, as in an office, condensing water can be led via the screw-type hose coupling to the condensing water reservoir delivered with the unit. The reservoir is placed under the bottom tank by pushing it to the rails on the socle. In this case, a separate condensing water outlet is not used. NOTE! If a condensing water reservoir is used, it must be inspected sufficiently often.

• As the screw-type hose coupling is located almost in the middle of the unit, the unit has to be located in a horizontal position.

Location of VALLOX

• The unit is mounted indoors, in a place where temperature does not fall below +10˚C.

• The unit shall be mounted in a place where the sound pressure level coming through the envelope is not acoustically disturbing (storerooms, halls, utility rooms, and in some cases rooms where people spend a lot of time, such as classrooms).

• The unit is equipped with an adjustable socle. If the unit is mounted on a wall, keep in mind the weight of the unit (190kg) and vibration damping.

• The unit is splash-proof (IP34), so it can also be mounted in a damp room.

VALLOX Duct Connections

• The unit has four Ø 250 inner fittings equipped with rubber rings. The inner fittings can be detached and replaced with another type of fitting, such as bends. Fix the ducts steadily and tightly to the outlets. (Note! Aggregatets modeller L/R.) En eventuell isolering av kanalerna utförs enligt ventilationsplanen.

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11

A

B

C

D

If the unit is equipped with pressure difference switches that monitor the pressure difference in the supply and / or discharge air ducts, their correct values have to be set after the ducts and the related air terminal devices (such as valves and grilles) have been mounted and adjusted. For further details, see the Instructions for using VALLOX 252 M.

• If the unit is equipped with a water post-heating unit, the unit has to be connected to the hot water circuit with copper tubes 15/13.

• The water circulation post-heating unit can be controlled with a thermostat valve R 1/2" equipped with a separate sensor. The valve is installed in the return water pipe, and the sensor in the supply duct outside VALLOX. Because of the risk of freezing in the heating unit, it is recommended to use a pipe connection as shown in the figure (A).

NOTE! THE REGULATING VALVE IS NOT INCLUDED IN THE DELIVERY.

VALLOX Pipe Connections

VALLOX Pressure Difference Switches

A B C

D

A B C

D

4

2

DN 15

Thermostat valve R1/2" for radiator

Regulating valve

Heating unit with water circulation

Example of Pipe Connections VALLOX 252 M VKL

Figure A

Drainage

IP

(Door and insulation 55 mm)

4 pcs

VALLOX 252 M

SOUND ATTENUATOR

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General

• The sound attenuator is a duct silencer that should be mounted on top of VALLOX 252 M. The attenuator includes a cover that can be opened, enabling the cleaning of the attenuator without detaching the ducts.

• The sound attenuator unit also features detachable attenuation segments in supply and discharge air ducts.

• 4 Ø 250 external fittings enable the laying of ducts straight from the unit by using bends etc.

• The top of the attenuator unit incorporates lead-in sealings for the lead-through tubes of cables and for the supply and return water pipes of a water heating unit, if one is used.

• The weight of the sound attenuator unit is 105kg including the door, and 82kg without the door.

VALLOX 252 M

MOUNTING INSTRUCTIONS FOR THE SOUND ATTENUATOR

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16

Mounting

NOTE! BEFORE MOUNTING, CHECK THE MODEL OF VALLOX 252 M (L or R).

• Detach the door of the sound attenuator. (See the adjoining picture.)

• Detach the sleeves equipped with draught limiters (see the figure, item D).

• Cut through the lead-in sealings for the cable sleeves at the bottom of the extract duct

of the sound attenuator unit (no isolation inside). NOTE! VALLOX 252 model L or R. (See the figure.)

• If VALLOX 252 is equipped with a water heating unit, also detach the sound attenuation segment located in the supply air duct of the unit. NOTE! VALLOX 252 model L or R. (See the figure.)

• Lift the sound attenuator unit on top of VALLOX 252. Make sure that the cable sleeves go through. (See the figure, item D.)

• Mount the lead-through cable tubes (included in the delivery), pushing them through the lead-in sealings on top of the sound attenuator unit, and screwing them to the cable sleeves. (See the figure, item C.)

• Lay the cables to be connected through the lead-through tubes to the connection box inside VALLOX 252.

• If a water heating unit is used, lead the supply and return pipes (not included in the delivery) of the heating unit through the lead-in sealings on top of the sound attenuator unit and VALLOX 252, and connect them to the supply and return water outlets with a straight fitting, for instance. (See the figure, items A and B.)

• Mount the sound attenuation segment in place.

• Carefully fix the door of the sound attenuator in place.

• Fix the ducts steadily and tightly to the outlets. If ducts are to be isolated, do so

following the ventilation plan.

Supply and return water

pipe Ø15/13 2 pcs

Straight fitting

MS15 2 pcs

Supply and return

water outlet 2 pcs

Lead-through tubes

for cables 3 pcs

Sleeve equipped with draught-limiter 3 pcs

Cable sleeve 3 pcs

Supply and return

water pipe Ø15/13 2 pcs

Lead-in sealings for supply

and return water pipes 2 pcs

Sound attenuator unit (Note! Vallox model)

Duct fitting Ø250 4 pcs

Lead-through tubes for cables 3 pcs

Lead-in sealing for cable lead-through tube 3 pcs

Lead-in sealing for cable sleeve 3 pcs (bottom)

VALLOX 250 L (Note! model)

Sound attenuation

segment

VALLOX 252 M

MOUNTING INSTRUCTIONS

17

VALLOXs Electrical Connections

• The unit is connected permanently to the electrical power network. The connection box is located inside the unit, next to the extract air duct outlet.

• The cables to be connected are led to the unit through the sleeves with draughtlimiters and the cable sleeves located beside the extract air duct outlet.

Mounting

• Detach the upper door of the unit (screw M8x70, 5 pcs).

• Detach the cover of the connection box (screw 3.5x9.5, 2 pcs).

• Mount and fasten the cables needed to the terminal block following the connection

instructions.

• The external wiring diagram is included in these instructions, and it is also found inside the cover of the connection box.

• The internal wiring diagram is included in these instructions, and it is also found on the cover of the fuse box inside the unit.

Installation of the Manual Control Unit

• The control panel that comes with the unit is in a surface mounting case. The manual control unit can also be flush mounted in a double gang box (U 17.2 ENSTO).

• The manual control unit cannot be used in connection with remote monitoring control.

Connection to Remote Monitoring

• The ventilation unit is connected to remote monitoring according to the wiring diagrams attached.

• The manual control unit cannot be used in connection with remote monitoring control.

Selection of Control Voltages for Capacity Modes (Min., 1/2 and Max.)

BEFORE SELECTING CONTROL VOLTAGES, MAKE SURE THAT THE UNIT HAS BEEN DISCONNECTED FROM THE MAINS SUPPLY!

• If needed, the factory settings for adjusting fan capacity modes (Min., 1/2 and Max.) can be modified.

• The factory setting for the Min. mode control voltage is 90V. You can modify the control voltage by moving the conductor between contact 13 of the K2 contactor and the transformer to the desired voltage (100V, 110V, 130V, 140V, 160V, 200V, and 230V).

• The factory setting for the 1/2 mode control voltage is 140V. You can change the control voltage by moving the conductor between contact 14 of the K3 contactor and the transformer to the desired voltage (90V, 100V, 110V, 130V, 160V, 200V, and 230V).

• The factory setting for the Max. mode control voltage is 230V. You can change the control voltage by moving the conductor between contact 13 of the K1 contactor and the transformer to the desired voltage (90V, 100V, 110V, 130V, 140V, 160V, and 200V).

ONLY AN AUTHORIZED PERSON MAY PERFORM ELECTRICAL CONNECTIONS!

BEFORE CONNECTING THE CABLES, MAKE SURE THAT THEY HAVE BEEN DISCONNECTED FROM THE MAINS SUPPLY!

FEEDER CABLE

• Distribution panel

CONNECTION CABLE

• Remote monitoring

• Manual control

CONNECTION CABLE

• Duct damper motor

OUTDOOR

AIR TO THE

UNIT

EXTRACT AIR

GOING OUT

SUPPLY AIR

FROM THE

UNIT

DISCHARGE AIR TO THE

UNIT

SUPPLY WATER TO THE RADIATOR

VALLOX 252 M-L

ELECTRICAL CONNECETIONS

RETURN WATER FROM THE RADIATOR

Manual control unit

VALLOX 252 M

INTERNAL WIRING DIAGRAM VALLOX 252 M

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K4 = Contactor, disconnection of the heating units for heat recovery bypass S = Service switch (door switch) LP1 = Preheater 2,500W (optional) LP2 = Post-heating unit 2,500W (optional) TZ1 = Overheating protector +60oC TZ2 = Overheating protector +95oC (manual reset) PDS1 = Supply air duct pressure difference switch (optional) PDS2 = Discharge air duct pressure difference switch (optional) F1 = Fuse 4A F2 = Fuse 1.6A

TF = Supply air fan 2x230W PF = Discharge air fan 2x230W C = Capacitor 6mF FG = Damper motor TR = Transformer 230V 4A/24V 25VA TS1 = Defrosting thermostat for heat recovery cells + 2oC (adjustable) TS2 = Thermostat for post-heating unit +15oC...25oC TS5 = Thermostat for preheater +4oC (adjustable) K1 = Contactor max. speed K2 = Contactor min. speed K3 = Contactor 1/2 speed

VALLOX 252 M

EXTERNAL ELECTRICAL CONNECTIONS VALLOX 252 M - MANUAL CONTROL

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MANUAL CONTROL UNIT

CAM SWITCH

WINTER

SUMMER

DAMPER MOTOR 24VAC

FOR OUTDOOR OR

EXTRACT AIR DUCT

5x0.5 ÖPVC-OZ OR SIMILAR

NOTE! When the VALLOX 252 M unit is equipped with a

PREHEATER and a POST-HEATING UNIT WITH WATER

CIRCULATION, the L1 and L on the terminal block are

connected. .

In this case, THE PREHEATER DOES NOT NEED a separate

power supply.

NOTE! When the VALLOX 252 M unit is equipped with a PREHEATER and an ELECTRIC

POST-HEATING UNIT, a separate 16A power supply is needed for THE PREHEATER.

DISTRIBUTION PANEL

POS. 2 STATUS POS. 1 MAX. 1/2 MIN. STATUS NC 24VAC MAX. 1/2 MIN. N / 24VAC L10 L1 L N

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VALLOX 252 M

Vallox Oy FIN-32200 Loimaa Finland Tel: +358 2 7636 300 Fax: +358 2 7631 539

Internet: www.vallox.com

1.09.85E/3.01/PDF

VALLOX 252 M

EXTERNAL ELECTRICAL CONNECTIONS VALLOX 252 REMOTER MONITORING CONTROL

VALLOX 252 M External Electrical

Fan capacity control

Control voltage 24VAC for the Min. mode

Control voltage 24VAC for the 1/2 mode

Control voltage 24VAC for the Max. mode

Control voltage 24VAC for remote monitoring

Heat recovery bypass control

Heat recovery active = 24VAC

Heat recovery deactivated = 0VAC

Operation mode information on

fan capacity modes

Entering operation mode information on capacity modes

Operation mode information on the Min. mode

Operation mode information on the 1/2 mode

Operation mode information on the Max. mode

Operation mode information from

the pressure difference switch

Operation mode information from Pos. 1 (discharge air duct)

Entering operation mode information for Pos. 1 and Pos. 2

Operation mode information from Pos. 2 (discharge air duct)

REMOTE MONITORING

12x0.5 ÖPVC-OZ OR SIMILAR

DAMPER MOTOR 24VAC

FOR OUTDOOR OR

EXTRACT AIR DUCT

NOTE! When the VALLOX 252 M unit is equipped with a

PREHEATER and a POST-HEATING UNIT WITH WATER

CIRCULATION, the L1 and L on the terminal block are

connected. In this case, THE PREHEATER DOES NOT NEED

a separate power supply.

NOTE! When the VALLOX 252 M unit is equipped with a

PREHEATER and an ELECTRIC POST-HEATING UNIT, a separate

16A power supply is needed for THE PREHEATER.

DISTRIBUTION PANEL

POS. 2 STATUS POS. 1 MAX. 1/2 MIN. STATUS NC 24VAC MAX. 1/2 MIN. N / 24VAC L10 L1 L N

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VALLOX 252 M