Danfoss AB-QM 4.0 Flexo, DN 15-20 Operating Guide

Installation

This section details the installation process for the AB-QM 4.0 Flexo. Ensure proper handling and connection as per the diagrams.

Important Symbols:

Maintenance Free: [Maintenance Free Symbol]
Temperature Range: -10...95°C
Pressure Rating: PN 25
Maximum Differential Pressure: Δp_max = 10 bar

Installation Steps:

Refer to the diagrams for specific connection and tightening procedures. Ensure correct wrench sizes are used for DN15 (27 mm, 29 mm) and DN20 (30 mm, 32 mm) connections.

Diagram Description: The diagrams illustrate the assembly of the valve, including flexible hoses and the correct orientation of components. Arrows indicate the direction of flow and assembly steps.

Insulation

Instructions for applying insulation to the AB-QM 4.0 Flexo unit. Follow the numbered steps in the provided diagrams.

Diagram Description: The diagrams show how to place insulation components around the valve assembly, ensuring a snug fit for optimal thermal performance.

Filter Cleaning

This section describes the procedure for cleaning the filter. It involves shutting off the flow, removing the filter, cleaning it, and reassembling.

Steps:

Turn the valve to the 'SHUT' position.
Unscrew the filter housing.
Remove and clean the filter element.
Reassemble the unit.

Diagram Description: Visuals demonstrate the process of accessing and cleaning the internal filter, including the use of a wrench (16 mm) and cleaning the filter element.

Operation

Information on the operation of the AB-QM 4.0 Flexo, including setting the flow rate using the adjustment dial.

Flow Rate Adjustment:

The adjustment dial allows setting the flow rate from 10% to 100%. The scale indicates the percentage of maximum flow.

Diagram Description: The diagram shows the adjustment dial with markings from 0 to 10, representing percentage settings. An arrow indicates the direction to turn for adjustment.

Shut-off/Maintenance

Procedures for shutting off the valve for maintenance purposes. This includes locking the valve in a specific position.

Diagram Description: The diagram illustrates how to lock the valve handle using a wire or seal to prevent unauthorized operation.

Flushing of Main Pipe

Instructions for flushing the main pipe connected to the system. This can be done via backward or forward flushing.

Backward Flushing:

The diagram shows the setup for backward flushing, where water is directed against the normal flow to clear the system.

Forward Flushing:

The diagram illustrates forward flushing, where water flows through the system in the normal direction to remove debris. It shows the use of a cup to collect flushed water and the operation of the drain valve.

Diagram Description: The diagrams depict the pipework configuration for both backward and forward flushing, highlighting the flow paths and the components involved, including the fan coil unit.

Technical Specifications and Dimensions

Detailed dimensions for different models (DN15LF, DN15, DN15HF, DN20, DN20HF) are provided in the tables below.

Dimensions Table 1

	DN15LF	DN15	DN15HF	DN20	DN20HF
A	185	185	185	200	200
B	111.5	111.5	111.5	111.5	111.5
C	96	96	96	96	96
D	62	62	62	65	65
E	53	53	53	53	53
F	R 1/2	R 1/2	R 1/2	R 1/4	R 1/4

Dimensions Table 2

	A	B
DN15	R 1/2	307.5
DN20	R 1/4	319.5

Dimensions Table 3

	A	B	C
DN15	120	190	200
DN20	120	190	215

Diagram Description: The diagrams provide visual representations of the valve assembly with labeled dimensions (A, B, C, D, E, F) corresponding to the tables.

Flow Rate Settings

The following table provides flow rate (L/h, L/s, GPM) settings for various percentages of maximum flow for DN15 and DN20 models, including Low Flow (LF) and High Flow (HF) variants.

Setting	DN15 LF			DN 15			DN 15 HF			DN 20			DN 20 HF
Setting	L/h	L/s	GPM	L/h	L/s	GPM	L/h	L/s	GPM	L/h	L/s	GPM	L/h	L/s	GPM
10%	20	0.006	0.09	65	0.018	0.29	120	0.033	0.53	110	0.03	0.48	190	0.053	0.84
15%	30	0.008	0.13	98	0.027	0.43	180	0.050	0.79	165	0.05	0.73	285	0.079	1.25
20%	40	0.011	0.18	130	0.036	0.57	240	0.067	1.06	220	0.06	0.97	380	0.106	1.67
25%	50	0.014	0.22	163	0.045	0.72	300	0.083	1.32	275	0.08	1.21	475	0.132	2.09
30%	60	0.017	0.26	195	0.054	0.86	360	0.100	1.59	330	0.09	1.45	570	0.158	2.51
35%	70	0.019	0.31	228	0.063	1.00	420	0.117	1.85	385	0.11	1.70	665	0.185	2.93
40%	80	0.022	0.35	260	0.072	1.14	480	0.133	2.11	440	0.12	1.94	760	0.211	3.35
45%	90	0.025	0.40	293	0.081	1.29	540	0.150	2.38	495	0.14	2.18	855	0.238	3.76
50%	100	0.028	0.44	325	0.090	1.43	600	0.167	2.64	550	0.15	2.42	950	0.264	4.18
55%	110	0.031	0.48	358	0.099	1.57	660	0.183	2.91	605	0.17	2.66	1045	0.290	4.60
60%	120	0.033	0.53	390	0.108	1.72	720	0.200	3.17	660	0.18	2.91	1140	0.317	5.02
65%	130	0.036	0.57	423	0.117	1.86	780	0.217	3.43	715	0.20	3.15	1235	0.343	5.44
70%	140	0.039	0.62	455	0.126	2.00	840	0.233	3.70	770	0.21	3.39	1330	0.370	5.86
75%	150	0.042	0.66	488	0.135	2.15	900	0.250	3.96	825	0.23	3.63	1425	0.396	6.27
80%	160	0.044	0.70	520	0.144	2.29	960	0.267	4.23	880	0.24	3.87	1520	0.422	6.69
85%	170	0.047	0.75	553	0.154	2.43	1020	0.283	4.49	935	0.26	4.12	1615	0.449	7.11
90%	180	0.050	0.79	585	0.163	2.58	1080	0.300	4.76	990	0.28	4.36	1710	0.475	7.53
95%	190	0.053	0.84	618	0.172	2.72	1140	0.317	5.02	1045	0.29	4.60	1805	0.502	7.95
100%	200	0.056	0.88	650	0.181	2.86	1200	0.333	5.28	1100	0.31	4.84	1900	0.528	8.37

Importer Information

Importer: TOB з іi "Данфосс TOB" 04080, Київ 80, п/с 168, Україна

Manufacturer: Danfoss A/S

Contact: Climate Solutions • danfoss.com • +4574882222

Any information provided, including product selection, application, design, weight, dimensions, capacity, or technical data, is considered informative and only binding if explicitly referenced in a quotation or order confirmation. Danfoss is not responsible for errors in catalogues, brochures, or other materials. Danfoss reserves the right to alter products without prior notice, including ordered products if alterations do not change form, fit, or function. All trademarks are property of Danfoss A/S or its group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.

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