Type AK-Uni

AK-Uni-004-ZL-M-L

For circular diffuser faces

Plenum box with damper blade (optional)

Type AK-Uni

Universal plenum box, available in many variants

Plenum boxes for supply air and extract air

For circular and square diffuser faces
Plenum box made of galvanised sheet steel
For supply and extract air
For all types of ceiling systems
Horizontal duct connection
Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
For comfort zones and industrial zones

Optional equipment and accessories

Damper blade for volume flow rate balancing
Pressure tap and cord-operated damper blade for volume flow rate balancing
Lip seal

Application

Application

Type AK-Uni plenum boxes for the connection of circular and square diffuser faces to circular ducts, suitable for supply air or extract air applications in comfort and industrial zones
For diffuser faces of Types VDW, TDV, RFD, FD, TDF, ADD, ADLQ, DLQ, ADLR, and DLQL, with central screw fixing
For variable and constant volume flows
For all types of ceiling systems

Special characteristics

Plenum box made of galvanised sheet steel
For all types of ceiling systems
For circular and square diffuser faces
Horizontal duct connection
For comfort zones and industrial zones

Description

Variants

AK-Uni-...-ZL: Supply air
AK-Uni-...-AL: Extract air

Parts and characteristics

Casing with spigot and cross bar for fixing the diffuser face
Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
Simple installation of the diffuser face due to central fixing screw with decorative cap

Attachments

M: Damper blade for volume flow rate balancing
MN: Pressure tap and cord-operated damper blade for volume flow rate balancing with the diffuser face in place

Accessories

Lip seal

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

Casing, cross bar and spigot made of galvanised sheet steel
Equalising element made of galvanised, perforated sheet steel
Lip seal made of rubber

Maintenance

Maintenance-free as construction and materials are not subject to wear
Inspection and cleaning to VDI 6022

Technical information

Function, Technical data – supply air, Technical data – extract air, Specification text, Order code

Schematic illustration 00129249_0

A Plenum box for square diffuser faces
B Plenum box for circular diffuser faces
① Plenum box
② Central fixing screw
③ Cross bar
④ Suspension hole
⑤ Spigot

Optional
⑥ Lip seal
⑦ Damper blade for volume flow rate balancing
⑧ Pressure tap
⑨ Green cord for closing the damper blade
⑩ White cord for opening the damper blade
⑪ Measuring tube
⑫ Text label indicating plenum box variant

Functional description

Plenum boxes are used to connect ceiling diffusers to circular ducts and to fix the diffuser face.

Type AK-Uni plenum boxes are fitted with an equalising element that ensures that the air is evenly distributed to the room.

A damper blade (optional) simplifies volume flow rate balancing for commissioning. Pressure tap and cord-operated damper blade (optional) allow for volume flow rate balancing with the diffuser face in place.

Plenum boxes for square diffuser faces

Plenum boxes for circular diffuser faces

Plenum boxes for Type RFD diffuser faces

Legende verwendeter Abkürzungen

ØD [mm]	Außendurchmesser des Anschlussstutzens
Q₃ [mm]	Abmessungen eines quadratischen Anschlusskastens
H₃ [mm]	Höhe eines Deckenluftdurchlasses mit Anschlusskasten von der Unterkante der abgehängten Decke bis zur Oberkante des Anschlusskastens oder des Anschlussstutzens
A [mm]	Lage des Anschlussstutzens, definiert durch den Abstand der Mittellinie zur Unterkante der abgehängten Decke
C [mm]	Länge des Anschlussstutzens
m [kg]	Gewicht (Masse)

Standard combinations

Variant	Diffuser face Variant
Variant	VDW-Q			TDV-SA-Q			FD-Q			TDF-SA-Q
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-001	300 × 8	10.3	36.9	300	13.2	47.7	300	10.1	36.5	300	13.2	47.7
AK-Uni-002	400 × 16	19.6	70.7	400	22.8	82.1	400	19.6	70.7	400	22.8	82.1
AK-Uni-003	500 × 24	24.2	87.1	500	27.9	100.5	500	25.8	92.7	500	27.9	100.5
AK-Uni-004	600 × 24 625 × 24	34.9	125.8	600 625	40.4	145.5	600 625		125.8	600 625	40.4	145.5
AK-Uni-005	600 × 48	43.0	154.8
AK-Uni-006	625 × 54	44.2	158.9
AK-Uni-007	825 × 72	72.8	262.2

Standard combinations

Variant	Diffuser face Variant
Variant	ADD-Q			ADLQ DLQ			ADLR-Q
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-002				400	30.1	108.2
AK-Uni-008				250	10.1	36.2
AK-Uni-009				300	14.8	53.4
AK-Uni-010				500	48.3	173.7
AK-Uni-011				600 625	72.2	260.0
AK-Uni-019	250	7.6	27.4				1	8.3	29.8
AK-Uni-020	300	14.5	52.2				2	14.8	53.3
AK-Uni-021	400	22.2	79.9				3	24.0	86.2
AK-Uni-022	450	35.7	128.7				4	35.7	128.7
AK-Uni-023	500	39.8	143.4				5	41.8	150.6
AK-Uni-024							6	57.4	206.8
AK-Uni-025	600 625	68.2	245.7				7	64.4	231.9
AK-Uni-026							8	70.7	254.7

Alternative combinations

Variant	Diffuser face Variant
Variant	VDW-Q			FD-Q			ADLQ DLQ
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-004							600< 625<	50.7	182.4
AK-Uni-005	600 × 24 625 × 24	34.9	125.8	600 625	34.9	125.8	600< 625<	50.7	182.4
AK-Uni-006	625 × 24	34.9	125.8	625	34.9	125.8	625<	50.7	182.4
AK-Uni-010	500 × 24>	28.9	104.1	500>	28.7	103.5
AK-Uni-011	600 × 24> 625 × 24>	39.4	141.9	600> 625>	39.4	141.9
AK-Uni-012	600 × 24> 625 × 24>	39.4	141.9	600< 625<	39.4	141.9	600 625	72.2	260.0
AK-Uni-012	600 × 48>	50.5	182.0
AK-Uni-027	625 × 24>	39.4	141.9	625>	39.4	141.9	625	72.2	260.0
AK-Uni-027	625 × 54>	53.2	191.4

< Smaller connection diameter

> Larger connection diameter

Standard combinations

Variant	Diffuser face Variant
Variant	VDW-R			TDV-SA-R			FD-R			TDF-SA-R
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-013	300 × 8	9.4	33.8	300	13.2	47.7	300	10.2	36.5	300	13.2	47.7
AK-Uni-014	400 × 16	19.6	70.7	400	22.8	82.1	400	19.6	70.7	400	22.8	82.1
AK-Uni-015	500 × 24	23.1	83.0	500	27.9	100.5	500	26.2	94.4	500	27.9	100.5
AK-Uni-016	600 × 24 625 × 24	34.5	124.3	600 625	40.4	145.5	600 625	34.5	124.3	600 625	40.4	145.5
AK-Uni-017	600 × 48	44.0	158.3

Standard combinations

Variant	Diffuser face Variant
Variant	ADD-R			ADLR
Variant	Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-019	250	7.6	27.4	1	8.3	29.8
AK-Uni-020	300	14.5	52.2	2	14.8	53.3
AK-Uni-021	400	22.2	79.9	3	24.0	86.2
AK-Uni-022	450	35.7	128.7	4	35.7	128.7
AK-Uni-023	500	39.8	143.4	5	41.8	150.6
AK-Uni-024				6	57.4	206.8
AK-Uni-025	600	68.2	245.7	7	64.4	231.9
AK-Uni-026				8	70.7	254.7

Alternative combinations

Variant	Diffuser face Variant
Variant	VDW-R			FD-R			ADLR
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-013							2	14.8	53.3
AK-Uni-014							4>	31.3	112.6
AK-Uni-016							7<	51.1	184.1
AK-Uni-017	600 × 24 625 × 24	34.5	124.3	600 625	34.5	124.3	7	51.1	184.1
AK-Uni-018	625 × 24	34.0	122.5	625	34.0	122.5	8<	51.1	183.9
AK-Uni-022	400 × 16>	17.6	67.1	400>	18.6	67.1
AK-Uni-024	500 × 24>	28.1	101.3	500>	31.1	111.8
AK-Uni-025	600 × 24> 625 × 24>	36.5	131.4	600> 625>	36.5	131.4
AK-Uni-025	600 × 48>	51.7	186.0
AK-Uni-026	625 × 24>	36.1	129.9	625>	36.1	129.9

< Smaller connection diameter

> Larger connection diameter

Standard combinations

Variant	Nominal size	RFD without discharge nozzle		RFD with discharge nozzle
Variant	Nominal size	K value
Variant	mm	l/s	m³/h	l/s	m³/h
AK-Uni-028	125	3.5	12.4	4.7	17.9
AK-Uni-029	160	5.2	18.7	7.3	26.3
AK-Uni-030	200	7.1	25.5	12.2	43.9
AK-Uni-031	250	12.9	46.4	19.0	68.4
AK-Uni-032	315	22.8	82.0	28.6	103.0
AK-Uni-033	400	34.5	124.3	37.3	134.4

Plenum boxes for square diffuser faces

Plenum boxes for circular diffuser faces

Standard combinations

Variant	Diffuser face Variant
Variant	VDW-Q			TDV-SA-Q			FD-Q			TDF-SA-Q
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-001	300 × 8	8.9	32.1	300	16.4	59.0	300	11.6	41.7	300	16.4	59.0
AK-Uni-001	300 × 8/0	15.6	56.0	300/0	27.3	98.2
AK-Uni-002	400 × 16	17.6	63.5	400	28.9	104.2	400	23.8	85.5	400	28.9	104.2
AK-Uni-002	400 × 16/0	34.4	123.9	400/0	43.1	155.2
AK-Uni-003	500 × 24	25.7	92.6	500	38.5	138.7	500	38.3	137.9	500	38.5	138.7
AK-Uni-003	500 × 24/0	52.7	189.7	500/0	65.9	237.1
AK-Uni-004	600 × 24 625 × 24	41.8	150.6	600 625	52.3	188.2	600 625	55.7	200.5	600 625	52.3	188.2
AK-Uni-004	600 × 24/0 625 × 24/0	63.9	230.1	600/0 625/0	94.0	338.3
AK-Uni-005	600 × 48	54.7	197.0
AK-Uni-005	600 × 48/0	87.8	316.1
AK-Uni-006	625 × 54	59.6	214.7
AK-Uni-006	625 × 54/0	96.3	346.1
AK-Uni-007	825 × 72	96.7	348.7
AK-Uni-007	825 × 72/0	173.3	623.9

... /0: Diffuser face without air control blades

Standard combinations

Variant	Diffuser face Variant
Variant	ADD-Q			ADLQ DLQ			ADLR-Q
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-002				400	36.3	130.8
AK-Uni-008				250	9.8	35.3
AK-Uni-009				300	18.6	66.9
AK-Uni-010				500	68.7	247.2
AK-Uni-011				600 625	114.6	412.6
AK-Uni-019	250	8.7	31.4				1	7.7	27.8
AK-Uni-020	300	20.6	74.0				2	14.8	53.2
AK-Uni-021	400	26.9	97.0				3	20.7	74.4
AK-Uni-022	450	39.3	141.5				4	30.1	108.2
AK-Uni-023	500	54.1	194.9				5	45.1	162.4
AK-Uni-024							6	56.4	203.0
AK-Uni-025	600 625	71.1	256.0				7	72.8	262.1
AK-Uni-026							8	97.5	351.1

Alternative combinations

Variant	Diffuser face Variant
Variant	VDW-Q			FD-Q			ADLQ DLQ
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-004							600< 625<	139.1	500.6
AK-Uni-005	600 × 24 625 × 24	42.1	151.6	600 625	44.1	158.8	600< 625<	111.2	400.3
AK-Uni-005	600 × 24/0 625 × 24/0	65.6	236.0
AK-Uni-006	625 × 24	40.3	145.2	625	50.6	182.1	625<	137.9	496.4
AK-Uni-006	625 × 24/0	66.8	240.5
AK-Uni-010	500 × 24>	27.4	98.8	500>	39.8	143.3
AK-Uni-010	500 × 24/0>	49.4	177.8
AK-Uni-011	600 × 24> 625 × 24>	45.1	162.3	600> 625>	60.3	217.1
AK-Uni-011	600 × 24/0> 625 × 24/0>	69.1	248.7
AK-Uni-012	600 × 24> 625 × 24>	42.8	154.1	600< 625<	60.0	216.1	600 625	114.3	411.6
AK-Uni-012	600 × 24/0> 625 × 24/0>	70.6	254.3
AK-Uni-012	600 × 48>	58.4	210.2
AK-Uni-012	600 × 48/0>	94.0	338.4
AK-Uni-027	625 × 24>	40.4	154.4	625>	58.8	211.8	625	118.9	428.0
AK-Uni-027	625 × 24/0>	69.4	250.0
AK-Uni-027	625 × 54>	64.0	230.3
AK-Uni-027	625 × 54/0>	104.7	377.0

... /0: Diffuser face without air control blades

< Smaller connection diameter

> Larger connection diameter

Standard combinations

Variant	Diffuser face Variant
Variant	VDW-R			TDV-SA-R			FD-R			TDF-SA-R
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-013	300 × 8	9.3	33.6	300	16.4	59.0	300	13.0	46.7	300	16.4	59.0
AK-Uni-013	300 × 8/0	16.2	58.1	300/0	26.7	96.7
AK-Uni-014	400 × 16	17.9	64.3	400	28.9	104.2	400	25.2	90.6	400	28.9	104.2
AK-Uni-014	400 × 16/0	35.4	127.4	400/0	44.8	161.1
AK-Uni-015	500 × 24	25.3	90.9	500	38.5	138.7	500	38.4	138.1	500	38.5	138.7
AK-Uni-015	500 × 24/0	50.9	183.2	500/0	66.8	240.6
AK-Uni-016	600 × 24 625 × 24	42.2	151.9	600 625	52.3	188.2	600 625	57.7	207.7	600 625	52.3	188.2
AK-Uni-016	600 × 24/0 625 × 24/0	65.3	235.1	600/0 625/0	95.1	342.5
AK-Uni-017	600 × 48	58.1	209.1
AK-Uni-017	600 × 48/0	88.0	316.9

... /0: Diffuser face without air control blades

Standard combinations

Variant	Diffuser face Variant
Variant	ADD-R			ADLR
Variant	Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-019	250	8.7	31.4	1	7.7	27.8
AK-Uni-020	300	20.6	74.0	2	14.8	53.2
AK-Uni-021	400	26.9	97.0	3	20.7	74.4
AK-Uni-022	450	39.3	141.5	4	30.1	108.2
AK-Uni-023	500	54.1	194.9	5	45.1	162.4
AK-Uni-024				6	56.4	203.0
AK-Uni-025	600	71.1	256.0	7	72.8	262.1
AK-Uni-026				8	97.5	351.1

Alternative combinations

Variant	Diffuser face Variant
Variant	VDW-R			FD-R			ADLR
Variant	Nominal size	K value		Nominal size	K value		Nominal size	K value
Variant	mm	l/s	m³/h	mm	l/s	m³/h	mm	l/s	m³/h
AK-Uni-013							2	14.5	52.1
AK-Uni-014							4>	30.5	109.9
AK-Uni-016							7<	76.7	276.2
AK-Uni-017	600 × 24 625 × 24	40.3	145.0	600 625	58.1	209.0	7	71.0	255.7
AK-Uni-017	600 × 24/0 625 × 24/0	67.3	242.1
AK-Uni-018	625 × 24			625	50.6	182.1	8<	101.1	364.0
AK-Uni-018	625 × 24/0
AK-Uni-022	400 × 16>	18.0	64.9	400>	25.0	90.0
AK-Uni-022	400 × 16/0>	31.5	113.3
AK-Uni-024	500 × 24>	28.6	103.0	500>	40.2	144.6
AK-Uni-024	500 × 24/0>	45.0	161.9
AK-Uni-025	600 × 24> 625 × 24>	37.7	158.2	600> 625>	59.3	213.6
AK-Uni-025	600 × 24/0> 625 × 24/0>	70.5	253.9
AK-Uni-025	600 × 48>	59.0	212.3
AK-Uni-025	600 × 48/0>	96.5	347.4
AK-Uni-026	625 × 24>			625>	61.0	219.4
AK-Uni-026	625 × 24/0>

... /0: Diffuser face without air control blades

< Smaller connection diameter

> Larger connection diameter

Universal plenum boxes for the connection of circular and square diffuser faces to circular ducts, suitable for supply air or extract air applications. For installation into all types of suspended ceilings.

Ready-to-install component which consists of the plenum box, equalising element (only supply air variants), side entry spigot, cross bar, and suspension holes.

The diffuser face is fixed to the cross bar with a central screw, concealed by a decorative cap.

Spigot suitable for ducts to EN 1506 or EN 13180.

Special characteristics

Plenum box made of galvanised sheet steel
For all types of ceiling systems
For circular and square diffuser faces
Horizontal duct connection
For comfort zones and industrial zones

Materials and surfaces

Casing, cross bar and spigot made of galvanised sheet steel
Equalising element made of galvanised, perforated sheet steel
Lip seal made of rubber

Type
AK-Uni Plenum box

Variant
001 to 033

System
ZL Supply air
AL Extract air

Damper blade for volume flow rate balancing
       No entry: none
M       With
MN       With cords and pressure tap

Accessories
No entry: none
L With lip seal

Order example: AK-Uni-003-AL-MN-L

Variant	003
System	Extract air
Damper blade for volume flow rate balancing	Volume flow rate adjustment with cords and pressure tap
Accessories	With lip seal

Variants, Dimensions and weight

AK-Uni-004-ZL-M-L

Plenum boxes for square diffuser faces

Plenum boxes for circular diffuser faces

Plenum boxes for Type RFD diffuser faces

Standardverwendungen für quadratische Frontdurchlässe

Produktvariante	ØD	Frontdurchlass Variante
Produktvariante	ØD	VDW-Q	TDV-SA-Q	FD-Q	TDF-SA-Q	ADD-Q	ADLQ DLQ	ADLR-Q	DLQL
AK-Uni-001	158	300 × 8	300	300	300				300
AK-Uni-002	198	400 × 16	400	400	400		400		400
AK-Uni-003	198	500 × 24	500	500	500
AK-Uni-004	248	600 × 24 625 × 24	600 625	600 625	600 625
AK-Uni-005	248	600 × 48
AK-Uni-006	248	625 × 54
AK-Uni-007	313	825 × 72
AK-Uni-008	158						250		250
AK-Uni-009	158						300
AK-Uni-010	248						500		500
AK-Uni-011	313						600 625
AK-Uni-012	313								600
AK-Uni-019	123					250		1
AK-Uni-020	158					300		2
AK-Uni-021	198					400		3
AK-Uni-022	248					450		4
AK-Uni-023	248					500		5
AK-Uni-024	313							6
AK-Uni-025	313					600 625		7
AK-Uni-026	313							8

Alternative Verwendungen für quadratische Frontdurchlässe

Produktvariante	ØD	Frontdurchlass Variante
Produktvariante	ØD	VDW-Q	FD-Q	ADLQ DLQ
AK-Uni-004	248			600<, 625<
AK-Uni-005	248	600 × 24 625 × 24	600 625	600< 625<
AK-Uni-006	248	625 × 24	625	625<
AK-Uni-010	248	500 × 24>	500>
AK-Uni-011	313	600 × 24> 625 × 24>	600> 625>
AK-Uni-012	313	600 × 24> 625 × 24>	600< 625<	600 625
AK-Uni-012	313	600 × 48>
AK-Uni-027	313	625 × 24>	625>	625
AK-Uni-027	313	625 × 54>

< Kleinerer Anschlussdurchmesser

> Größerer Anschlussdurchmesser

Standardverwendungen für runde Frontdurchlässe

Produktvariante	ØD	Frontdurchlass Variante
Produktvariante	ØD	VDW-R	TDV-SA-R	FD-R	TDF-SA-R	ADD-R	ADLR
AK-Uni-013	158	300 × 8	300	300	300
AK-Uni-014	198	400 × 16	400	400	400
AK-Uni-015	198	500 × 24	500	500	500
AK-Uni-016	248	600 × 24 625 × 24	600 625	600 625	600 625
AK-Uni-017	248	600 × 48
AK-Uni-019	123					250	1
AK-Uni-020	158					300	2
AK-Uni-021	198					400	3
AK-Uni-022	248					450	4
AK-Uni-023	248					500	5
AK-Uni-024	313						6
AK-Uni-025	313					600	7
AK-Uni-026	313						8

Alternative Verwendungen für runde Frontdurchlässe

Produktvariante	ØD	Frontdurchlass Variante
Produktvariante	ØD	VDW-R	FD-R	ADLR
AK-Uni-013	158			2
AK-Uni-014	198			4>
AK-Uni-016	248			7<
AK-Uni-017	248	600 × 24 625 × 24	600 625	7
AK-Uni-018	248	625 × 24	625	8<
AK-Uni-022	248	400 × 16>	400>
AK-Uni-024	313	500 × 24>	500>
AK-Uni-025	313	600 × 24> 625 × 24>	600> 625>
AK-Uni-025	313	600 × 48>
AK-Uni-026	313	625 × 24>	625>

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> Größerer Anschlussdurchmesser

Standardverwendungen für Frontdurchlass RFD

Produktvariante	ØD	Frontdurchlass Serie
Produktvariante	ØD	RFD
AK-Uni-028	98	125
AK-Uni-029	123	160
AK-Uni-030	158	200
AK-Uni-031	198	250
AK-Uni-032	248	315
AK-Uni-033	313	400

Universal plenum box AK-Uni for square diffuser faces

Produktvariante	ØD mm	□Q₃ mm	H₃ mm	A mm	C mm	m kg
AK-Uni-001	158	290	250	139	50	3.0
AK-Uni-002	198	372	295	164	50	4.5
AK-Uni-003	198	476	295	164	50	6.0
AK-Uni-004	248	567	345	199	48	8.2
AK-Uni-005	248	590	345	189	48	8.6
AK-Uni-006	248	615	345	189	48	9.0
AK-Uni-007	313	806	410	222	50	16.0
AK-Uni-008	158	216	250	139	50	2.2
AK-Uni-009	158	266	250	139	50	2.7
AK-Uni-010	248	476	345	189	48	6.6
AK-Uni-011	313	567	410	222	50	9.2
AK-Uni-012	313	590	410	222	50	9.6
AK-Uni-027	313	615	410	222	50	10.2

Weights apply to the supply air variant

Produktvariante	□Q₃ mm	H₃ mm	ØD₄ mm	H₄ mm	ØD mm	A mm	C mm	m kg
AK-Uni-013	290	285	278	250	158	174	50	3.4
AK-Uni-014	372	330	362	295	198	199	50	5.1
AK-Uni-015	476	330	460	295	198	199	50	6.9
AK-Uni-016	567	380	557	345	248	234	48	9.3
AK-Uni-017	590	380	578	345	248	224	48	9.7
AK-Uni-018	615	380	590	345	248	224	48	10.3
AK-Uni-019	266	255	202	220	123	161	48	2.9
AK-Uni-020	290	285	258	250	158	174	50	3.5
AK-Uni-021	372	330	314	295	198	199	50	5.2
AK-Uni-022	476	380	362	345	248	224	48	7.8
AK-Uni-023	476	380	426	345	248	224	48	7.6
AK-Uni-024	567	445	482	410	313	257	50	10.5
AK-Uni-025	590	445	578	410	313	257	50	10.8
AK-Uni-026	615	445	590	410	313	257	50	11.4

Weights apply to the supply air variant

RFD

Produktvariante	□Q₃ mm	H₃ mm	ØD₄ mm	H₄ mm	ØD mm	A mm	C mm	m kg
AK-Uni-028	216	255	125	195	98	170	50	2.5
AK-Uni-029	266	280	160	220	123	182	48	3.0
AK-Uni-030	290	310	200	250	158	194	50	3.5
AK-Uni-031	476	355	250	295	198	219	50	7.5
AK-Uni-032	567	395	315	345	248	244	48	10.0
AK-Uni-033	615	470	400	410	313	277	50	12.0

Weights apply to the supply air variant

Installation details, Commissioning, Basic information and nomenclature

Installation and commissioning

Note the installation details for ceiling diffusers
Horizontal duct connection
If necessary, carry out volume flow rate balancing with the damper blade

AK-Uni-...-MN Volume flow rate balancing

① Damper blade
② White cord for opening the damper blade

Open, 0°

Volume flow rate balancing

When several diffusers are connected to just one volume flow controller, it may be necessary to balance the volume flow rates.

Ceiling diffusers with universal plenum box and damper blade (variant -M): The diffuser face can be removed to access the damper blade; the damper blade can then be set to any position between 0 and 90°
Ceiling diffusers with universal plenum box, damper blade and pressure tap (variant -MN): The diffuser face need not be removed since the damper blade can be set with two cords (white and green).

Volume flow rate measurement

Ceiling diffusers with universal plenum box, damper blade and pressure tap (variant -MN) allow for volume flow rate balancing even with the diffuser face in place.

Connect the measuring tube to the digital manometer
Read the effective pressure
Read the volume flow rate off the characteristic or calculate it
If necessary, adjust the damper blade position with the cords

A characteristic is included with each AK-Uni plenum box.

Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Outer diameter of a circular diffuser face

ØD₂ [mm]

Diameter of a circular diffuser face style

ØD₃ [mm]

Diameter of a circular plenum box

□Q₁ [mm]

Outer diameter of a square diffuser face

□Q₂ [mm]

Dimensions of a square diffuser face style

□Q₃ [mm]

Dimensions of a square plenum box

H₁ [mm]

Distance (height) from the lower edge of the suspended ceiling to the lower edge of the diffuser face

H₂ [mm]

Height of a ceiling diffuser, from the lower edge of the suspended ceiling to the upper edge of the spigot

H₃ [mm]

Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot

A [mm]

Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling

C [mm]

Length of the spigot

m [kg]

Weight

Nomenclature

L_WA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δt_z [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δp_t [Pa]

Total differential pressure

A_eff [m²]

Effective air discharge area

All sound power levels are based on 1 pW.

Downloads

product information

Product data sheet Type AK-Uni

Product data sheet 2,8 MB pdf

certificates

Declaration of hygiene conformity Type AK-Uni

AK-Uni_HC_2020_06_08_DE_en Hygiene certificate 1,9 MB pdf

operation manuals

Installation manual

IM_2018_06_A00000054447 Installation manual 1,2 MB pdf

Type AK-Uni

Universal plenum box, available in many variants

Application

Description

Technical information

Function, Technical data – supply air, Technical data – extract air, Specification text, Order code

Variants, Dimensions and weight

Installation details, Commissioning, Basic information and nomenclature

Downloads

product information

Product data sheet Type AK-Uni

certificates

Declaration of hygiene conformity Type AK-Uni

operation manuals

Installation manual