Characteristic curve

WR 400 - Characteristic curve WR 400

I - Interval / vacation operation for humidity protection

Reduced ventilation
Nominal ventilation
Intensive / Party operation
Recommended setting range

WR 400 - Characteristic curve for power - air volumes

At 150 Pa counter pressure
At 100 Pa counter pressure
At 50 Pa counter pressure

WR 400 - Characteristic curve Ventilation for humidity protection

Interval switch for step 1

17 min to switch on

13 min to switch off

WR 400 - Characteristic curve Ventilation for humidity protection

Interval switch for step 1

17 min to switch on

13 min to switch off

Dimensioned drawing

WR 400 - Dimensioned drawing [mm]

DN 160 outgoing air
DN 160 supply air
DN 160 exhaust air
DN 160 outside air
Electrical connection
Condensation connection

Technical data

WR 400 - Technical data

Technical data

Article	WR 400
Number of ventilation levels	4
Air flow volume	100 m³/h - 400 m³/h
Volumetric flow constant	yes
Speed controllable	−
Type of voltage	Alternating current
Rated voltage	230 V
Frequency	50 Hz/60 Hz
Power consumption	37 W - 236 W / At 100 Pa counter pressure
I_max	2,5 A
Degree of protection	IP 00
DIBT approval	yes
PHI certification	yes
Installation site	Cellar / Storage tank / Jamb wall / Utility room / Heating room
System type	Centralised
Housing material	Sheet steel, powder coated
Heat exchanger material	Aluminium
Inner coating material	Synthetic material
Colour	pearl light grey
Weight	46,5 kg
Weight including packaging	54,465 kg
Filter class	G4 / F7
Connection diameter	160 mm
Connection diameter of condensation drain	3/4" hose connection
Width	786 mm
Height	825 mm
Depth	500 mm
Width with packaging	810 mm
Height with packaging	960 mm
Depth with packaging	520 mm
Degree of heat provision	90 %
Heat exchanger construction type	Cross-counterflow
Bypass	External
Frost protection	External
Enthalpy heat exchanger	No
Antifreeze circuit	yes
Summer circuit	Exhaust air with RLS D1 WR
Filter monitoring	with time control
Humidity control	optional with HY 5, HY 5 I, HY 10 AP, HY 10 UP
CO₂ regulation (optional)	SKD
Air quality control (optional)	EAQ 10/2
KNX connection (optional)	to be supplied by the customer
MODBUS interface	No
Control unit included in scope of delivery.	RLS 1 WR
Control unit (optional)	RLS D1 WR
Wireless switch on/off (optional)	XE 1, XS 1
EnOcean wireless integration (optional)	No
Mobile control	No
Housing emission sound pressure level	44 dB(A) / 45 dB(A) / 49 dB(A) / Spacing 1m, sound absorption 10 m²
Approval number	Z-51.3-218
Packing unit	1 piece
Range	K
GTIN (EAN)	4012799950790
Article number	0095.0079

Sound power level in octave range

	63 Hz	125 Hz	250 Hz	500 Hz	1 kHz	2 kHz	4 kHz	8 kHz	Total
L_WA2, Step 1 (dB(A))	26	36	38	39	41	36	26	11	46
L_WA5, Step 1 (dB(A))	28	38	34	37	42	36	28	14	46
L_WA6, Step 1 (dB(A))	26	39	34	43	44	38	29	14	48
L_WA2, Level 2 (dB(A))	25	37	39	40	43	39	28	14	47
L_WA5, Level 2 (dB(A))	27	39	35	38	43	38	29	16	47
L_WA6, Level 2 (dB(A))	26	41	35	45	45	40	32	17	50
L_WA2, Level 3 (dB(A))	28	40	42	44	46	44	33	21	51
L_WA5, Level 3 (dB(A))	31	41	40	42	47	43	35	22	50
L_WA6, Level 3 (dB(A))	29	42	38	47	48	45	36	21	53

L_WA2= housing sound power level in dB.

L_WA5= free inlet sound power level in dB.

L_WA6= free outlet sound power level in dB.

L_WA5, L_WA6 = sound power level emitted to the free surroundings. Measured at a subsequent operating point on the connections facing the room. L_WA5 Exhaust air connections, L_WA6 Supply air connections.

Operating point, level 1: Air volume 150 m³/h and external pressure 100 Pa

Operating point, level 2: Air volume 200 m³/h and external pressure 100 Pa

Operating point, level 3: Air volume 300 m³/h and external pressure 100 Pa

Accessories / Spare parts

WR 400 - Accessories / Spare parts

Specific accessories

Product type	Name	Art. No.	Price*(EUR)
Air filter, replacement	WSF 300-400	0093.0898	on request
Air filter, replacement	WSG 300-400	0093.0897	on request
Room air control	RLS 1 WR	0157.0809	on request
Room air control	RLS D1 WR Discontinued product	0157.0828	on request
Bypass for heat exchanger	WRBY 300-400 No longer available for delivery	0093.0899	on request
Wall bracket	WRK 300-400 No longer available for delivery	0018.0493	on request
Summer cassette	WRSK 300-400 No longer available for delivery	0095.0152	on request

General accessories

Product type	Name	Art. No.	Price*(EUR)	Action
MAICOTherm ventilation duct system, thermally insulated	MAICOTherm MT thermally insulated ventilation duct system	-	-	-
Shutter	AS 20	0151.0330	on request
External grille	MGR 160 alu	0078.0036	on request
Outside air wall connection	KW-AL 16E	0152.0077	on request
Outside air wall connection	KW-AL 16W	0152.0078	on request
Outside air wall connection	KW-AL 20E	0152.0081	on request
Outside air wall connection	KW-AL 20W	0152.0082	on request
Outgoing air wall connection	KW-FL 16E	0152.0079	on request
Outgoing air wall connection	KW-FL 16W	0152.0080	on request
Outgoing air wall connection	KW-FL 20E	0152.0083	on request
Outgoing air wall connection	KW-FL 20W	0152.0084	on request
Combi-wall connections	KWH 16 L	0152.0061	on request
Combi-wall connections	KWH 16 R	0152.0060	on request
Combi-wall connections	KWH 20 L	0152.0063	on request
Combi-wall connections	KWH 20 R	0152.0062	on request
Roof outlet	DF 160 S	0092.0375	on request
Roofing tile	DP 160 SB	0092.0380	on request
Roofing tile	DP 160 A	0092.0383	on request
Mounting clamp	BS 160	0092.0360	on request
Rain protection grille	RG 160	0151.0281	on request
Disk valve, stainless steel	TM-V2A 10	0151.0374	on request
Disk valve, stainless steel	TM-V2A 12	0151.0375	on request
Disk valve, metal	TFA 10	0151.0369	on request
Disk valve, metal	TFA 12	0151.0370	on request
Disk valve, metal	TFZ 10	0151.0364	on request
Disk valve, metal	TFZ 12	0151.0365	on request
Mounting frame for TFA/TFZ	EBR-D 10	0092.0493	on request
Mounting frame for TFA/TFZ	EBR-D 12	0092.0494	on request
Supply air valve	ZWVQ 10	0152.0064	on request
Supply air valve	ZWVQ 12	0152.0065	on request
Sound absorber box	SB 12/16	0059.0995	on request
Tubular sound absorber	RSR 10 Remaining parts	0092.0311	on request
Tubular sound absorber	RSR 12 Remaining parts	0092.0312	on request
Tubular sound absorber	RSR 16/50 Discontinued product	0092.0324	on request
Tubular sound absorber	RSR 8-1	0092.0591	on request
Tubular sound absorber	RSR 10-1	0092.0592	on request
Tubular sound absorber	RSR 12-1	0092.0593	on request
Tubular sound absorber	RSR 16-1	0092.0595	on request
Tubular sound absorber	RSR 16/50-1	0092.0603	on request
Slide-in sound absorber	SDE 8	0044.0213	on request
Slide-in sound absorber	SDE 10	0044.0214	on request
Slide-in sound absorber	SDE 12	0044.0215	on request
Slide-in sound absorber	SDE 16	0044.0216	on request
Electrical air heater	ERH 16-2	0082.0102	on request
Water air heater	WRH 16-2	0082.0118	on request
Air filter	TFE 16-4	0149.0077	on request
Air filter	TFE 16-7	0149.0052	on request
Thermostat	TH 10	0157.0764	on request
Channel sensor	FL 30 P	0157.0780	on request
Room sensor	FR 30 P	0157.0781	on request
Air flow monitor	LW 9	0157.0779	on request
CO2 sensor	SKD	0157.0345	on request
Thermally insulated long pipe elbow	ABLS 160 No longer available for delivery	0058.0048	on request
Tubular sound absorber	RSR 8 No longer available for delivery	0092.0310	on request
Tubular sound absorber	RSR 16 No longer available for delivery	0092.0314	on request
Radio switch	XS 1 No longer available for delivery	0157.0344	on request
Radio receiver	XE 1 No longer available for delivery	0157.0343	on request
Stainless steel cowl	LH-V2A 16 No longer available for delivery	0151.0380	on request
Air filter	TFE 16-5 No longer available for delivery	0149.0061	on request
Temperature control system	ETL 16 P No longer available for delivery	0157.0824	on request
Air quality controller	EAQ 10/2 No longer available for delivery	0157.0834	on request
Hygrostat	HY 5 No longer available for delivery	0157.0123	on request
Hygrostat	HY 5 I No longer available for delivery	0157.0125	on request
Hygrostat	HY 10 AP No longer available for delivery	0157.0358	on request
Hygrostat	HY 10 UP No longer available for delivery	0157.0357	on request

Spare parts

Product type	Name	Art. No.	Price*(EUR)
Circuit board	PL WRWSRB 2	E101.1352.0005	on request
Temperature sensor	TF WRWSRB 2	E157.1083.0000	on request
Door contact switch	TS 1	E157.1150.0000	on request

Product description

Productdescription

short description

Name: WR 400
Brand: MAICO
SKU: 0095.0079

Centralised ventilation unit with very effective heat recovery through cross-counter-flow exchanger, EC motors with constant volumetric flow regulation, interval mode, 80 - 400 m³/h, 4 x DN 160, including RLS 1 WR control unit, DIBT and passive energy house approval, KNX connection possible

Product description

Features

Special energy savings due to DC motors with EC technology.
With automatic volumetric flow regulation for constant air quantities.
Sheet steel, powder coated housing.
Colour pearl light grey.
Inner coating of heat resistant plastic material (EPP), non-hygroscopic.
Simple filter change is possible without tools.
2 x G4 filter, 1 x F7 filter.
4 DN 160 duct connections with double lip seals. For directly connecting up tubular sound absorbers.
Summer cassette as accessory.
DIBT approval and PH certification
Connection to KNX systems possible.

Control unit

RLS 1 WR control unit is included in the scope of delivery.
Filter change message.
Set the 4 ventilation levels using buttons.
Fault display.
Other control units can be connected in parallel.

Heat exchanger

Cross-counterflow plate heat exchanger made of aluminium.
The heat exchanger can be removed easily once the front plate has been unscrewed.
The heat exchanger can be easily cleaned using water.

Frost protection

Guaranteed frost protection ensures that the heat exchanger does not freeze.
The frost protection feature switches the supply air fan off when the outgoing air temperature is too low and automatically back on again.
Recommendation: Combine units with heat recovery with a brine earth heat exchanger.

Energy-efficient fans

2 centrifugal DC fans, curved to the front. In the supply or exhaust air.
4 ventilation levels:

I = Interval / vacation operation for humidity protection
1 = Reduced ventilation
2 = Nominal ventilation
3 = Intensive / party operation

The air volume is linearly adjustable.
300-type fans can be easily swapped for 400-type fans.

Mounting instructions

Feet for installation.
Installation on the wall or a pedestal is required to ensure access to the condensation connection.
Housing covers can be unscrewed.
Provide sound absorbers on the inlet and outlet sides.

Electrical connection

Ready for service.
Prepared for connection of sensors.
Potential-free contact e.g. for operating display.
Central inclusion in KNX/EIB bus possible.

Condensation drain

Condensation is drained out at the bottom of the unit. Condensation drain (3/4" hose diameter) to connect up to a siphon.
Stable foamed-in condensation tank.

Plus function (summer operation)

In eco mode, only the exhaust fan runs, so around 50 % less power is used. Possible with RLS D1 WR digital control.

Wiring diagram

WR 400 - Wiring diagram

WR 300, WR 400 ventilation unit with several RLS 1 WR room air controls

A - WR 300, WR 400 ventilation unit

A1 - control circuit board

B1 - operator unit (1) RLS 1 WR

B2 - operator unit (2) RLS 1 WR

Up to 5 RLS 1 WR operator units can be connected to the ventilation unit. (Only if there is no CO2 sensor connected).

The ventilation unit is prepared in the factory for connection to the RLS 1 WR operator unit, i.e. jumper 8 is bridged on control circuit board A1.

W1 - 230 V AC connecting cable

W2 - control cable for operator unit

V - distributor (supplied by the customer)

WR 300, WR 400 ventilation unit with RLS 1 WR room air control and CO2 sensor

A - WR 300, WR 400 ventilation unit

A1 - control circuit board

CO2 - CO2 sensor SKD (accessories)

W1 - 230 V AC connecting cable

W2 - control cable for room air control

W3' - connecting cable for an external CO2 sensor (to be supplied by the customer) Connection in the ventilation unit to the "CO2" and "OT" terminals of the control circuit board A1. The CO2 sensor must be activated in the ventilation unit. To do this, bridge jumper 10 (CO2) on control circuit board A1.

WR 300, WR 400 ventilation unit with RLS 1 WR room air control and differential pressure controller

The differential pressure controller P is a safety device which allows a ventilation system to be operated at the same time as an air-ventilated fireplace. The differential pressure controller prevents a ventilation unit connected to this safety device from being operated if the air pressure in the room falls below the outside pressure level. In the event of insufficient pressure, the potential-free relay contact (N/C contact) in the differential pressure controller opens. The fans in the ventilation unit stop and the RLS1WR operator unit is blocked until the relay contact in the pressure controller closes again and the fans start back up again.

Relay contact k is connected in series to the fans' supply voltage for this purpose.

When selecting the differential pressure controller, note the technical data of the switching output (potential-free relay contact k). Minimum switching capacity: 230V AC, 2A.

A - WR 300, WR 400 ventilation unit

A1 - control circuit board

B1 - room air control RLS 1 WR

P - differential pressure controller with potential-free relay contact k (provided by customer)

k - switching output, potential-free relay contact

W3" - connecting cable for differential pressure controller (provided by customer)

The connection between the differential pressure controller and ventilation unit is made with a W3" connecting cable. The potential-free relay contact k of the differential pressure controller P is connected to control circuit board A2 at terminals "N" and "N^-". The jumper on terminals "N" and "N^-" of control circuit board A2 must be removed first.

WR 300, WR 400 ventilation unit with RLS 1 WR room air control and hygrostat

Connection of hygrostat with potential-free contact. If the potential-free contact in the hygrostat closes due to room dampness, the ventilation unit is set to LS3 regardless of the ventilation level set. Once the dampness has been removed from the room (contact in hygrostat opens), the ventilation unit switches back to the ventilation level previously set.

A - WR 300, WR 400 ventilation unit

A1 - control circuit board: Jumper 10 (CO2) open

B1 - room air control RLS 1 WR

r.F. (relative humidity) - HY5 or HY5I hygrostat, see accessories

The ventilation unit is prepared in the factory for connection to a hygrostat with a potential-free contact, jumper 10 on control circuit board A2 is open.

W3' - connecting cable for an external hygrostat (to be supplied by the customer).

Connection to control circuit board A2 at "CO2" terminals

see diagram

WR 300, WR 400 ventilation unit with RLS 1 WR room air control

A - WR 300, WR 400 ventilation unit

ABL - exhaust air

A1 - control circuit board

B - operator unit RLS 1 WR

BA - operating display

M1 - supply air fan

M2 - exhaust air fan

N - mains

S - door contact switch/activated via front plate

S1 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 1

S2 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 2

S3 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 3

S1 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 1

S2 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 2

S3 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 3

Tmin - frost protection temperature sensor

W1 - 230V AC connecting cable

W2 - control cable for operator unit

ZUL - supply air

Jumper settings:

J 1-3 - unit type, 001=WR 300 / 010=WR 400

J 4-5 - frost protection temperature

J 6 - no function

J 7 - time limitation (60 minutes) LS 3 is activated

J 8 - operator unit RLS 1 WR is selected

J 9 - off function is approved on RLS 1 WR operator unit

J 10 - 0 - 10 V input for CO₂-sensor blocked

Further connection options:

W3/W3' Connecting cable (to be supplied by the customer) for external CO₂-sensor, hygrostat or external operation display.

CO₂-sensor: SKD Hygrostat:HY5 / HY5I

k1 - potential-free relay contact (max.3A / 250V, 2A / 30 V DC). The contact is closed when the ventilation unit is running.

WR 300, WR 400 ventilation unit with RLS 2 F room air control

A - WR 300, WR 400 ventilation unit

ABL - exhaust air

A1 - control circuit board

B - operator unit RLS 1 WR

BA - operating display

M1 - supply air fan

M2 - exhaust air fan

N - mains

S - door contact switch/activated via front plate

S1 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 1

S2 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 2

S3 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 3

S1 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 1

S2 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 2

S3 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 3

Tmin - frost protection temperature sensor

W1 - 230 V AC connecting cable

W2 - control cable for operator unit

ZUL - supply air

* - Brown and white cable cores are not required. Insulate them.

Jumper settings:

J 1-3 - unit type, 001=WR 300 / 010=WR 400

J 4-5 - frost protection temperature

J 6 - no function

J 7 - no function when using the RLS 2 F operator unit

J 8 - operator unit RLS 1 WR is selected

J 9 - no function when using the RLS 2 F operator unit

J 10 - 0 - 10 V input for CO₂-sensor blocked

Further connection options:

W3/W3' Connecting cable (to be supplied by the customer) for external CO₂-sensor, hygrostat or external operation display.

CO₂-sensor: SKD Hygrostat: HY 5 / HY 5 I

k1 - potential-free relay contact (max.3A / 250V, 2A / 30 V DC). The contact is closed when the ventilation unit is running.

WR 300 / WR 400 wiring diagram with RLS D1 WR room air control (plus function)

A - WR 300 / WR 400 or RB 300 / RB 400 ventilation unit

A1 - Electronic slide-in module

A2 - Control circuit board

B1 - RLS 1 WR or RB-ZF4 room air control

B - RLS D1 WR or RB-D1-ZF4 room air control

W1 -230 VAC connecting cable

W2 - Shielded control cable (to be supplied by customer) for RLS D1 WR / RB-D1-ZF4 room air control. Room air control B (RLS D1 WR / RB-D1-ZF4) can also be connected instead of room air control B1 (RLS 1 WR /

RB-D1-ZF4). External diameter of the shielded cable 3.2...6.5 mm, e.g. LIYCY 2 x 0.75 mm².

W2' - Control cable (to be supplied by customer) for RLS 1 WR / RB-ZF4 room air control. External diameter of the control cable 3.2...6.5 mm, e.g. LIYY 6 x 0.34 mm²

S1 - Unit switch

M1 - Supply air fan

M2 - Exhaust air fan

S - Door contact switch/activated via front plate

T-min - Frost protection temperature sensor

S1 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 1

S2 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 2

S3 [blue] - setting potentiometer for supply air volumetric flow, ventilation level 3

S1 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 1

S2 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 2

S3 [red] - setting potentiometer for exhaust air volumetric flow, ventilation level 3

Jumper settings

J 1-3 - WR 300 (0,0,1) / WR 400 (0,1,0) unit type

J 4-5 - Frost protection temperature

J 6 - No function

J 7 - Time limitation (60 minutes) LS3 is activated

J 8 - RLS 1 WR or RLS D1 WR control unit is selected

J 9 - Humidity protection is blocked at switch position OFF Control unit: Switch setting OFF (standby) is

released

J 10 - 0 - 10V input for CO2 sensor blocked

Further connection options

W3 - Connecting cable (provided by customer) for external operating display.

k1- Potential-free relay contact k1 (max. 3 A / 250 VAC, 2 A / 30 VDC). Contact k1 is closed when the ventilation unit is running.

W4 - Connecting cable (to be supplied by customer) for external CO2/VOC sensor or external hygrostat. Hygrostat with potential-free contact.

W5 -Connecting cable (provided by customer) for external differential pressure controller. Differential pressure controller with potential-free relay contact. Minimum switching capacity of relay contact: 230 VAC / 2A. Remove J1 bridge on A2 control circuit board.

Downloads / Videos

WR 400 - Downloads / Videos

Predecessor - successor

WR 400 - Successor

Product type	Name	Art. No.	Action
Centralised ventilation unit	WR 410	0095.0228
Centralised ventilation unit	WR 410 R	0095.0261

Centralised ventilation unit

WR 400

WR 400 - Characteristic curve WR 400

WR 400 - Characteristic curve for power - air volumes

WR 400 - Characteristic curve Ventilation for humidity protection

WR 400 - Characteristic curve Ventilation for humidity protection

WR 400 - Dimensioned drawing [mm]

WR 400 - Technical data

WR 400 - Accessories / Spare parts

Specific accessories

General accessories

Spare parts

short description

Product description

Features

Control unit

Heat exchanger

Frost protection

Energy-efficient fans

Mounting instructions

Electrical connection

Condensation drain

Plus function (summer operation)

Table of contents

WR 400 - Wiring diagram

WR 300, WR 400 ventilation unit with several RLS 1 WR room air controls

WR 300, WR 400 ventilation unit with RLS 1 WR room air control and CO2 sensor

WR 300, WR 400 ventilation unit with RLS 1 WR room air control and differential pressure controller

WR 300, WR 400 ventilation unit with RLS 1 WR room air control and hygrostat

WR 300, WR 400 ventilation unit with RLS 1 WR room air control

WR 300, WR 400 ventilation unit with RLS 2 F room air control

WR 300 / WR 400 wiring diagram with RLS D1 WR room air control (plus function)

WR 400 - Downloads / Videos

WR 400 - Successor