Heating, Ventilation, Air conditioning/VVS Archive

Heating, Ventilation, Air conditioning/VVS Files

File size: 44.04 KB Download

Gullies: discharge capacity (NT VVS 039)

NT VVS 039

  • This Nordtest method is designed to ascertain the maximum water-flow a gully can discharge before backing-up, leakage, noise etc. occurs. Max. discharge capacity from floor and through side-inlets are measured.

File size: 39.50 KB Download

Gullies: Temperature resistance (NT VVS 038)

NT VVS 038

  • The purpose of this NORDTEST method is to test the tigthness and rigidity of the shape of a gully, when it, after installation, is subjected to temperature changes within a range considered normal for domestic installations.

File size: 36.77 KB Download

Gullies: Air tightness (NT VVS 037)

NT VVS 037

  • This NORDTEST method is designed to ascertain whether the gully trap is sufficiently tight to prevent passage of foul gases from the drainage system.

File size: 46.75 KB Download

Gullies: Tightness between floor and gully (NT VVS 036)

NT VVS 036

  • This NORDTEST method is designed to check whether the joint between gully and floor covering is watertight.

File size: 45.60 KB Download

Gullies: Tightness of side-inlet joint (NT VVS 035)

NT VVS 035

  • This NORDTEST method is designed to establish whether the connection of side inlets to the gully is satisfactory when it is fitted according to the manufacturer's instructions.

File size: 45.42 KB Download

Gullies: Mechanical strength (NT VVS 034)

NT VVS 034

  • This NORDTEST method is designed to determine whether a gully can withstand normal stresses when installed in a floor according to the manufacturer's instructions.

File size: 42.53 KB Download

Pressure reduction valves: Wear (NT VVS 033)

NT VVS 033

  • The test is designed to ascertain whether the valve, during a given period, shows satisfactory durability and functions without maintenance.

File size: 60.56 KB Download

Pressure reduction valves: Flow capacity (NT VVS 032)

NT VVS 032

  • The test is designed to determine the pressure drop curve of a valve in the range from zero flow to "maximum flow" through the valve.

File size: 82.39 KB Download

Pressure reduction valves: Regulating ability (NT VVS 031)

NT VVS 031

  • The test is designed to determine the regulating ability of the valve. The valve shall ensure that a pre-set secondary pressure is satisfactorily maintained during normal variations in the primary pressure and water flow.

File size: 227.84 KB Download

Water taps: Water hammer (NT VVS 030)

NT VVS 030

  • This Nordtest method describes a procedure for measuring and assessing water hammer. The results of the measurements may be used to compare the water hammer properties of various models of water taps designed for use in sanitary installations.

File size: 38.99 KB Download

Water taps: Watertightness under static pressure (NT VVS 029)

NT VVS 029

  • This test proposal specifies a test method for verifying the watertightness of the water taps under mechanical stress, i.e. a check of both the sealing items in the water taps and the watertightness

File size: 43.35 KB Download

Water taps: Watertightness under operational conditions (NT VVS 028)

NT VVS 028

  • This method specifies a test for checking the watertightness of water taps after the taps have been subjected to a mechanical endurance test on the manoeuvering mechanism.

File size: 45.81 KB Download

Water taps: Flow resistance (NT VVS 027)

NT VVS 027

  • This test proposal specifies a method which permits measurements
    of water flow at different pressures. Flow resistance denotes
    the resistance exerted by a water tap to a flow of liquid.

File size: 60.41 KB Download

Plastics pipes: Stress cracking rubber sealants (NT VVS 026)

NT VVS 026

  • The purpose of this NORDTEST method is to find out if elastic rubber sealing rings used in plastic pipe systems contain components (i.e. softeners like dioctylphthalate in rubber rings in connections with PVC, subsidiary materials in connection with the production, stabilizers, etc.) which have a harmful influence on the plastic material.

File size: 141.18 KB Download

Heat recovery units: Functioning at low outdoor temperatures (NT VVS 025)

NT VVS 025

  • This NORDTEST method describes a test for testing the functioning of a heat recovery unit at low outdoor temperatures.

File size: 141.01 KB Download

Heat recovery units: Temperature efficiency (NT VVS 024)

NT VVS 024

  • This NORDTEST method describes a test for the determination of the temperature efficiency of a heat recovery unit.

File size: 35.93 KB Download

Heat recovery units: Air flow capacity (NT VVS 023)

NT VVS 023

  • This NORDTEST method describes a test for the determination of the air flow capacity of a heat recovery unit.

File size: 207.44 KB Download

Heat recovery units: Internal leakage (NT VVS 022)

NT VVS 022

  • This NORDTEST describes a test for the determination of internal leakage of air between the exhaust air and supply air systems of the unit.

File size: 147.99 KB Download

Heat recovery units: External leakage (NT VVS 021)

NT VVS 021

  • This NORDTEST method describes a test for the determination of air leakage between a heat recovery unit and the atmosphere.

File size: 123.17 KB Download

Heat meters - liquid flow: Calibration (NT VVS 020)

NT VVS 020

  • This NORDTEST method is designed to evaluate heat meters for the purpose of pattern approval.

File size: 149.35 KB Download

Buildings - ventilation air: Local mean age (NT VVS 019)

NT VVS 019

  • The scope of this NORDTEST method is to determine the local mean age
    of air at an arbitrary point in a ventilated space.

File size: 66.96 KB Download

Hot water heaters, enamelled: Internal corrosion resistance (NT VVS 017)

NT VVS 017

  • This NORDTEST method may be used for the testing and estimation of resistance against corrosion obtained by internal enamelling in hot water heaters made from steel.

File size: 25.90 KB Download

Flue gases: Acid dew point - detector method (NT VVS 016)

NT VVS 016

  • The purpose of this NORDTEST method is to determine the acid dewpoint in flue gases by a detector cooled by air.

File size: 97.19 KB Download

Sanitary mixing taps: Overflow (NT VVS 013)

NT VVS 013

  • This method is to be used for testing and estimating the resistance against overflow of sanitary taps designed for mixing cold and hot water.

File size: 95.76 KB Download

Water supply systems: Noise (NT VVS 012)

NT VVS 012

  • This method is to be used for testing and estimating the noise produced of water running through valves in water supply systems.

File size: 72.22 KB Download

Hot water supply systems – compression fittings for plastic pipes: Tightness (NT VVS 011)

NT VVS 011

  • This NORDTEST method specifies a test method to check whether or not joints between unions and pipes are watertight when subjected to temperature changes with and without tension in the joints, such as, bending, water hammering etc which occur in water pipes.

File size: 58.46 KB Download

Water closets: Property of flushing (NT VVS 001)

NT VVS 001

  • This paper describes a method for testing the flushing performance of a water-closet.

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