Centralised ventilation unit

WS 250

No longer available for delivery
Article number: 0095.0050
Manufacturer: MAICO
Centralised ventilation unit with very effective heat recovery, EC motors with constant volumetric flow... more information
Application examples: Single-family house, Passive energy house, Office, Waiting room
Product data sheet
WS 250 IM0009845.PNG Centralised ventilation unit with very effective heat recovery, EC motors with constant volumetric flow regulation, 4 x DN 160, including digital control unit, frost protection heating, bypass, DIBT and passive energy house approval, 100 - 250 m³/h, KNX connection possible
WS 250 IM0016031.PNG Centralised ventilation unit with very effective heat recovery, EC motors with constant volumetric flow regulation, 4 x DN 160, including digital control unit, frost protection heating, bypass, DIBT and passive energy house approval, 100 - 250 m³/h, KNX connection possible
WS 250 IM0007254.PNG Centralised ventilation unit with very effective heat recovery, EC motors with constant volumetric flow regulation, 4 x DN 160, including digital control unit, frost protection heating, bypass, DIBT and passive energy house approval, 100 - 250 m³/h, KNX connection possible
Back
  • On the notes
WS 250

Characteristic curve

WS 250 - Characteristic curve

  1. Step 1: 100 m3/ h
  2. Step 2: 150 m3/ h
  3. Step 3: 250 m3/ h

WS 250 - Characteristic curve

I - Qh = 30 kWh/(m2a)

II - Qh = 40 kWh/(m2a)

III- Qh = 50 kWh/(m2a)

IV - Qh = 60 kWh/(m2a)

V - Qh = 70 kWh/(m2a)

VI - Qh = 80 kWh/(m2a)

VII - Qh = 90 kWh/(m2a)

Heating system

Transfer: Radiators with 1 K thermostat valve

Storage: no storage

Distribution: heated, interior, 55°C / 45°C , controlled pump

Generation: Condensation boiler within the thermal sleeve

Heated drinking water

Storage: Indirectly heated storage tank within thermal sleeve

Distribution: Central within the building, without circulation, horizontal distribution within the thermal sleeve

Generation: central with condensation boiler

Taken into account: 12.5 kWh/(m2a)

Ventilation

Transfer: Ventilation system with an exhaust air temperature of 20° C

Distribution: Central supply air and exhaust air system

Generation: WS 250

Dimensioned drawing

WS 250 - Dimensioned drawing [mm]

  1. Outgoing air
  2. Supply air
  3. Exhaust air
  4. Outside air
  5. Electrical connection
  6. Condensation connection

Technical data

WS 250 - Technical data

Article WS 250
Number of ventilation levels 3
Air flow volume 100 m³/h - 250 m³/h
Volumetric flow constant yes
Speed controllable −
SEC average -32,4 kWh/(m²*a)
Energy efficiency class B
Type of voltage Alternating current
Rated voltage 230 V
Frequency 50 Hz/60 Hz
Power consumption 30 W - 95 W / At 100 Pa counter pressure
Imax 6,9 A / With active frost protection heating
Degree of protection IP 00
Electrical plug-type connection Earthing contact
DIBT approval yes
PHI certification yes
Installation site Cellar / Storage tank / Jamb wall / Utility room / Heating room
System type Centralised
Heat exchanger material Synthetic material
Colour Pure white, similar to RAL 9010
Weight 79 kg
Weight including packaging 87,5 kg
Filter class G4 / F7 / G4 / F7
Connection diameter 160 mm
Connection diameter of condensation drain 1/2" hose connection
Width 759 mm
Height 854 mm
Depth 531 mm
Width with packaging 780 mm
Height with packaging 985 mm
Depth with packaging 550 mm
Airstream temperature at IMax 50 °C
Degree of heat provision 92 %
Heat exchanger construction type Cross-counterflow
Bypass automatic
Frost protection integrated
Enthalpy heat exchanger optional (WSET 250)
Antifreeze circuit yes
Summer circuit Exhaust air
Filter monitoring pressure controlled
Humidity control optional with HY 5, HY 5 I, HY 10 AP, HY 10 UP
CO2 regulation (optional) SKD + relay (supplied by the customer)
Air quality control (optional) EAQ 10/1
KNX connection (optional) to be supplied by the customer
MODBUS interface No
Control unit included in scope of delivery. yes
Control unit (optional) No
Wireless switch on/off (optional) XE 1, XS 1
EnOcean wireless integration (optional) No
Mobile control No
Housing emission sound pressure level 36 dB(A) / Spacing 1m, sound absorption 10 m²
Approval number Z-51.3-104
Packing unit 1 piece
Range K
GTIN (EAN) 4012799950509
Article number 0095.0050

 

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

Total

LWA2, Level 2 (dB(A))

29

34

29

33

24

22

20

16

38

LWA5, Level 2 (dB(A))

28

37

39

40

40

40

34

26

48

LWA6, Level 2 (dB(A))

18

27

26

31

39

26

17

8

41

LWA2= housing sound power level in dB.

LWA5= free inlet sound power level in dB.

LWA6= free outlet sound power level in dB.

LWA5, LWA6 = sound power level emitted to the free surroundings. LWA5 Exhaust air connections, LWA6 Supply air connections.

Measured at air volume of 150 m³/h.

Accessories / Spare parts

WS 250 - Accessories / Spare parts

Specific accessories

Product type Name Art. No. Price*(EUR) Action
Air filter, replacement WSF 250 0093.0890 on request
  • On the notes
Air filter, replacement WSG 250 0093.0891 on request
  • On the notes
Enthalpy heat exchanger WSET 250 No longer available for delivery 0192.0610 on request
  • On the notes
Wall bracket WSK 250 No longer available for delivery 0018.0223 on request
  • On the notes

General accessories

Product type Name Art. No. Price*(EUR) Action
MAICOTherm ventilation duct system, thermally insulated MAICOTherm MT thermally insulated ventilation duct system - - -
Blower nozzle WD - - -
MAICOFlex ventilation duct system, round MAICOFlex flexible, round ventilation duct system - - -
Door ventilation grille Door ventilation grille - - -
Internal grille, adjustable AZE 100 - - -
MAICO FFS ventilation duct system, flat MAICO FFS flexible flat ventilation duct system - - -
Shutter AS 20 0151.0330 on request
  • On the notes
External grille MGR 160 alu 0078.0036 on request
  • On the notes
Outside air wall connection KW-AL 16E 0152.0077 on request
  • On the notes
Outside air wall connection KW-AL 16W 0152.0078 on request
  • On the notes
Outside air wall connection KW-AL 20E 0152.0081 on request
  • On the notes
Outside air wall connection KW-AL 20W 0152.0082 on request
  • On the notes
Outgoing air wall connection KW-FL 16E 0152.0079 on request
  • On the notes
Outgoing air wall connection KW-FL 16W 0152.0080 on request
  • On the notes
Outgoing air wall connection KW-FL 20E 0152.0083 on request
  • On the notes
Outgoing air wall connection KW-FL 20W 0152.0084 on request
  • On the notes
Combi-wall connections KWH 16 L 0152.0061 on request
  • On the notes
Combi-wall connections KWH 16 R 0152.0060 on request
  • On the notes
Combi-wall connections KWH 20 L 0152.0063 on request
  • On the notes
Combi-wall connections KWH 20 R 0152.0062 on request
  • On the notes
Roof outlet DF 160 S 0092.0375 on request
  • On the notes
Roofing tile DP 160 SB 0092.0380 on request
  • On the notes
Roofing tile DP 160 A 0092.0383 on request
  • On the notes
Mounting clamp BS 160 0092.0360 on request
  • On the notes
Rain protection grille RG 160 0151.0281 on request
  • On the notes
Exhaust and supply air valve AZV 100 0152.0087 on request
  • On the notes
Disk valve, synthetic material TK 10 0151.0192 on request
  • On the notes
Disk valve, synthetic material TK 12 0151.0198 on request
  • On the notes
Disk valve, metal TM 10 0151.0194 on request
  • On the notes
Disk valve, metal TM 12 0151.0196 on request
  • On the notes
Disk valve, stainless steel TM-V2A 10 0151.0374 on request
  • On the notes
Disk valve, stainless steel TM-V2A 12 0151.0375 on request
  • On the notes
Disk valve, metal TFA 10 0151.0369 on request
  • On the notes
Disk valve, metal TFA 12 0151.0370 on request
  • On the notes
Disk valve, metal TFZ 10 0151.0364 on request
  • On the notes
Disk valve, metal TFZ 12 0151.0365 on request
  • On the notes
Mounting frame for TFA/TFZ EBR-D 10 0092.0493 on request
  • On the notes
Mounting frame for TFA/TFZ EBR-D 12 0092.0494 on request
  • On the notes
Supply air valve ZWVQ 10 0152.0064 on request
  • On the notes
Supply air valve ZWVQ 12 0152.0065 on request
  • On the notes
Grease filter element for exhaust air FFE 10 0092.0506 on request
  • On the notes
Sound absorber box SB 12/16 0059.0995 on request
  • On the notes
Tubular sound absorber RSR 10 Remaining parts 0092.0311 on request
  • On the notes
Tubular sound absorber RSR 12 Remaining parts 0092.0312 on request
  • On the notes
Tubular sound absorber RSR 16/50 Discontinued product 0092.0324 on request
  • On the notes
Tubular sound absorber RSR 8-1 0092.0591 on request
  • On the notes
Tubular sound absorber RSR 10-1 0092.0592 on request
  • On the notes
Tubular sound absorber RSR 12-1 0092.0593 on request
  • On the notes
Tubular sound absorber RSR 16-1 0092.0595 on request
  • On the notes
Tubular sound absorber RSR 16/50-1 0092.0603 on request
  • On the notes
Slide-in sound absorber SDE 8 0044.0213 on request
  • On the notes
Slide-in sound absorber SDE 10 0044.0214 on request
  • On the notes
Slide-in sound absorber SDE 12 0044.0215 on request
  • On the notes
Slide-in sound absorber SDE 16 0044.0216 on request
  • On the notes
Electrical air heater ERH 16-2 0082.0102 on request
  • On the notes
Water air heater WRH 16-2 0082.0118 on request
  • On the notes
Air filter TFE 16-4 0149.0077 on request
  • On the notes
Air filter TFE 16-7 0149.0052 on request
  • On the notes
Thermostat TH 10 0157.0764 on request
  • On the notes
Channel sensor FL 30 P 0157.0780 on request
  • On the notes
Room sensor FR 30 P 0157.0781 on request
  • On the notes
Air flow monitor LW 9 0157.0779 on request
  • On the notes
Air quality controller EAQ 10/1 Discontinued product 0157.0777 on request
  • On the notes
Thermally insulated long pipe elbow ABLS 160 No longer available for delivery 0058.0048 on request
  • On the notes
Tubular sound absorber RSR 8 No longer available for delivery 0092.0310 on request
  • On the notes
Tubular sound absorber RSR 16 No longer available for delivery 0092.0314 on request
  • On the notes
Radio switch XS 1 No longer available for delivery 0157.0344 on request
  • On the notes
Radio receiver XE 1 No longer available for delivery 0157.0343 on request
  • On the notes
Brine-air heat exchanger EW-K 225 No longer available for delivery 0192.0520 on request
  • On the notes
Stainless steel cowl LH-V2A 16 No longer available for delivery 0151.0380 on request
  • On the notes
Air filter TFE 16-5 No longer available for delivery 0149.0061 on request
  • On the notes
Temperature control system ETL 16 P No longer available for delivery 0157.0824 on request
  • On the notes
Hygrostat HY 5 No longer available for delivery 0157.0123 on request
  • On the notes
Hygrostat HY 5 I No longer available for delivery 0157.0125 on request
  • On the notes
Hygrostat HY 10 AP No longer available for delivery 0157.0358 on request
  • On the notes
Hygrostat HY 10 UP No longer available for delivery 0157.0357 on request
  • On the notes

Spare parts

Product type Name Art. No. Price*(EUR) Action
Door contact switch TS 1 E157.1150.0000 on request
  • On the notes
Door contact switch TS 2 E157.0887.0000 on request
  • On the notes

Product description

Productdescription

WS 250

short description

Centralised ventilation unit with very effective heat recovery, EC motors with constant volumetric flow regulation, 4 x DN 160, including digital control unit, frost protection heating, bypass, DIBT and passive energy house approval, 100 - 250 m³/h, KNX connection possible

Product description

Features

  • Automatic constant volumetric flow regulation for equal air quantities.
  • Special energy savings due to the DC motor.
  • Galvanised plate housing, RAL 9010 plastic powder coated surface, sandwich construction, with integrated heat insulation.
  • Colour pure white, similar to RAL 9010
  • Integrated filter system with coarse filter (G4) and dust filter (F7) fitted in the outside air, coarse filter (G4) fitted in the exhaust air. Filter change is possible without tools.
  • Electronic filter monitoring with filter change warning displayed on the control unit.
  • 4 DN 160 duct connections with rubber lip seals on top of the unit. For directly connecting up tubular sound absorbers.
  • Air distribution bypass / heat exchanger = 70 % / 30 %.
  • Control unit included in scope of delivery.
  • DIBT approval and PH certification
  • Connection to KNX systems possible.

Control unit

  • Included in the scope of delivery for WS 250.
  • Switching the ventilation levels, timer, day and week program, filter change display and fault messages.
  • The control unit is connected to the centralised unit using a shielded 5-core cable. It has a maximum length of 100 m.
  • Dimensions of control unit:
    • Width: 150 mm
    • Height: 80 mm
    • Depth: 32 mm

Heat exchanger

  • Counterflow heat exchanger made of synthetic material (PS).
  • The heat exchanger can be easily removed and cleaned with water.

Frost protection

  • Integrated defroster heating component (1500 W) for trouble-free and frost-free operation.
  • Recommendation: Combine units with heat recovery with a brine earth heat exchanger.

Energy-efficient fans

  • 2 centrifugal DC fans, one fan each for supply air and exhaust air. Adjustable in 5 m3/h steps from 100 m3/h up to 250 m3/h.
  • 3 ventilation levels:
    • 1 = Reduced ventilation
    • 2 = Nominal ventilation
    • 3 = Intensive ventilation
    • Factory setting: 100 / 150 / 200 m3/h

Mounting instructions

  • Mounting on the wall or a pedestal is required to ensure access to the condensation connection.
  • For installation or wall fitting using a bracket: In cellars, attics and engineering rooms.
  • The front plate can be unscrewed.
  • Decouple the housing with impact sound plates for sound insulation.

Condensation drain

  • Condensation is drained out at the bottom of the unit using a hose (DN 1/2") connected to a siphon.

Table of contents

Wiring diagram

WS 250 - Wiring diagram

WS 250

E1 - pressure sensor / filter

E2 CO2 sensor / relay to be supplied by the customer ( potential-free contact)

E3 - air quality controller EAQ 10/1 (potential-free contact)

E4 - humidity sensor, hygrostat HY 5

E5 - auxiliary heater available, jumper (option) (for ext. auxiliary heating, bridge E5)

E6 - Select external temp. sensor T2, jumper (option) (for ext. T2 temp. sensor, bridge E6)

T1 - outside air temp. sensor

T2 - external temp. sensor (option)

T3 - outgoing air temp. sensor

T4 - room sensor for exhaust air

K5 - switching contact for ext. auxiliary heater

S1 - safety switch / activated via front plate

ZH - external auxiliary heater (option)

M1 - supply air fan

M2 - exhaust air fan

M3 - bypass lamella servomotor

ST - circuit mains unit

LT - power unit

FH - anti-frost protection heating

BE - operator unit

G - housing

E - feeder

O - option



WS 250 with KNX BUS

SD - socket

LT - power unit

E5 - wire E5 wire jumper

BE - operator unit

O - option

K1 - terminal 1 - dehumidify

K1 - terminal 3 - dehumidify

T4 - room sensor

T2 - alternative room sensor for operator unit. External temp. sensor “KTY81-110” / option

KA - KNX actuator to be supplied by the customer

BUS - KNX BUS

Set WS 250 to "man. Set fan level 1" on control unit.

KNX actuator programming:

Stage 0 = Switch off supply voltage (Stage 0 = A1)

Stage 1 = A1 ON, A2 OFF, A3 OFF

Stage 2 = A1 ON, A2 ON, A3 OFF (level 2 = A2)

Stage 3 = A1 ON, A2 OFF, A3 ON (60 min. overrun) (level 3 = A3)



WS 250 with ERH 16-2 electrical air heater

E5 - wire jumper E5; available for external auxiliary heater

T4 - room sensor in the control unit of the WS 250. The heating requirement is determined by comparing the actual room temperature (T4) and the setpoint room temperature

LW 9 - air flow monitor in supply air channel

K1 - power contactor US 16

ETL 16 P - electronic temperature controller

FL 30 P - channel sensor in supply air channel

FR 30 P - room sensor with setpoint generator

ERH 16-2 - electrical air heaters

BE - operator unit

WR 3223 - power module

ZH - external auxiliary heater on/off

O - option

SW- setpoint

K - coding

N - night reduction

S - sensor

pK - E2-E4 potential-free contacts!

  1. Ext. channel sensor and internal setpoint generator in ETL16P
  2. Ext. room sensor and external setpoint generator
  3. Ext. channel sensor and external setpoint generator
  4. Internal room sensor and internal setpoint generator in ETL16P

 



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