Siemens QFA1 Series Bedienungsanleitung

1518

QFA1001 QFA1000

Room Hygrostats

QFA1…

for relative humidity

•Hygrostat with single-pole microswitch

•Humidity measuring element made of stabilized plastic texture

•Setpoint knob for the upper switching point

•For controlling humidification equipment

•For controlling dehumidification equipment

•For mounting directly on the wall or on a recessed conduit box

Use

The room hygrostats are used for controlling and monitoring relative humidity in ventila-

tion or air conditioning plant.

They ensure room humidity control within the selectable range of 30 to 90 % relative

humidity by controlling humidification or dehumidification equipment.

They can also be used for monitoring minimum or maximum humidity levels.

Type summary

Type

reference Setpoint setting

range

Switching differential 1)

Setpoint

knob

Statically Dynamically

QFA1000 30…90 % r. h. Approx. 4 % r.h. 6 % r.h. Internally

QFA1001

30…90 % r. h. Approx. 4 % r.h. 6 % r.h. Externally

1) The static switching differential is determined at a constant ambient humidity by turning the setting

knob.

The dynamic switching differential is determined by changing the ambient humidity while maintain-

ing the same setpoint adjustment; only the dynamic switching differential is of practical value.

CE1N1518en

2014-07-30

Building Technologies

Ordering

When ordering, please give name and type reference, e.g.:

Room hygrostat QFA1001

Mode of operation

The room hygrostat acquires the relative humidity of the ambient air via its humidity

measuring element, which is made of stabilized plastic texture. This plastic band actu-

ates a microswitch depending on the relative humidity. The microswitch has a fixed

switching differential XSd and a potential-free contact output. If the actual humidity devi-

ates from the adjusted setpoint, the hygrostat switches the humidification or dehumidifi-

cation equipment as shown in the following function diagram.

S1 1

r. F. [%]

1518D01de

Legend:

r. h. Relative humidity in %

S1 Microswitch

1-2 Humidification

1-3 Dehumidification

w Setpoint = upper switching point

x Actual value

XSd Switching differential

t Time

Due to the measuring element’s aging effect, the switching point drifts slowly and con-

stantly. For this reason, recalibration may be required in due time.

At temperatures other than the calibration temperature, the switching point drifts sys-

tematically (temperature influence). Also, in the case of fast humidity changes, the

switching point will temporarily be shifted.

Mechanical design

The room hygrostat is designed for wall mounting. It fits on most commercially available

recessed conduit boxes. The cables are introduced either from the rear (recessed con-

duit boxes) or from above (surface-run wires), after knocking out the cable inlet

tongues.

The unit consists of base and cover.

Base and cover can be separated (snap-on connection).

The base accommodates the humidity measuring element, setpoint setting element

with setting spindle, scale, microswitch and screw terminals.

The cover carries the removable setpoint knob with its imprinted scale.

This model is of the same basic design as the QFA1001, but there is no external

setpoint knob. The setpoint can only be adjusted when the cover is removed.

Function diagram

QFA1001

QFA1000

2/4

Siemens Room hygrostats QFA1001, QFA1000 CE1N1518en

Building Technologies 2014-07-30

1518Z01

80 90

50 30

1 2 3

1 Setpoint knob with scale – only with QFA1001

2 Setpoint setting spindle

3 Scale for setpoint adjustment with QFA1000

Mounting notes

The base has cable entries at the rear for mounting the room hygrostat on recessed

conduit boxes. In the case of wall mounting, appropriate holes at the top or bottom can

be knocked out.

The unit should be mounted about 1.5 meters above the floor and at least 0.5 meters

from the closest wall.

Natural circulation of room air must be ensured at the location where the hygrostat is

mounted (no drafts, not in corners, not behind curtains, not in the vicinity of doors and

windows, and not on outer walls). Sources of heat or refrigeration (radiators, comput-

ers, TV sets, concealed heating pipes, hot and cold water pipes) must be located at

adequate distances.

The unit must not be exposed to direct solar radiation.

The room hygrostat is supplied complete with Mounting Instructions.

Disposal

The devices are considered electronics devices for disposal in term of European

Directive 2012/19/EU and may not be disposed of as domestic waste.

•Dispose of the device via the channels provided for this purpose.

•Comply with all local and currently applicable laws and regulations.

Technical data

Setpoint setting range

30…90 %

Humidity measuring element

stabilized plastic texture band

Control mode

2-position

Time constant (v = 0.2 m/s)

approx. 5 min

Switching differential X

refer to "Type summary"

Setting accuracy 1)

±5 % r.h.

Temperature influence

+0.5 % r.h./K

Humidity calibration at

55 % r.h., 23 °C

Long-term stability

approx. −1.5 % r.h./a

Type of switch

Contact rating

Maximum

Minimum

microswitch (1-pole potential-free changeover switch)

5(3) A, AC 250 V

100 mA, AC 24 V

External protection

Fuse slow max. T5A

Protection degree of housing

IP20 according to EN 60529

Protection class

II according to EN 60730-1

Screw terminals for

max. 2 x 1.5 mm2

Operating elements

Legend

Mounting choices

Mounting location

Mounting Instructions

Functional data

Degree of protection

Electrical connection

3/4

Siemens Room hygrostats QFA1001, QFA1000 CE1N1518en

Building Technologies 2014-07-30

Perm. ambient temperature

Noncondensing

0...40 °C

−25...

40 °C

Base

PPS Fortron, glassfiber-reinforced, black

Cover

PC Lexan 940, pure-white

Humidity measuring element

plastic texture

Product standard

EN 60730

-1

Automatic electrical con

trols for household

and similar use

EU Conformity (CE)

CE1T1518xx

QFA1001

QFA1000

0.090 kg

0.090 k

1) Can be improved by recalibrating on site

2) The documents can be downloaded from http://siemens.com/bt/download.

Connection diagrams

1518G01

1-2 Humidification

1-3 Dehumidification

Diagram 1: Humidification Diagram 2: Dehumidification

1518A01

T5A

AC 230 V

2 3

1518A02

T5A

AC 230 V

–

Dimensions

1518M01

80 90

50 30

4,2

Dimensions in mm

Environmental conditions

Materials and colors

Directives and Standards

Weight

Internal diagram

Connection diagrams

QFA1000, QFA1001

2004 – 2014 Siemens Switzerland Ltd Subject to change

4/4

Siemens Room hygrostats QFA1001, QFA1000 CE1N1518en

Building Technologies 2014-07-30

Dieses Handbuch passt für folgende Modelle

Andere Siemens Thermostat Handbücher

Siemens

Siemens Powers TH 192 S Bedienungsanleitung

Siemens

Siemens Albatros2 RVS46 Series Bedienungsanleitung

Siemens

Siemens RDG100KN Bedienerhandbuch

Siemens

Siemens RDD100 Series Bedienungsanleitung

Siemens

Siemens RDJ10 Bedienungsanleitung

Siemens

Siemens RAA20LD-GB Bedienungsanleitung

Siemens

Siemens DIGIFLOOR 2NC9 840 Bedienungsanleitung

Siemens

Siemens RAA11 Bedienungsanleitung

Siemens

Siemens QAA2212.*W*N Bedienungsanleitung

Siemens

Siemens RDF600 Series Bedienungsanleitung

Siemens

Siemens RDG110 Bedienungsanleitung

Siemens

Siemens REA23.03RF Bedienungsanleitung

Siemens

Siemens RDF880KN Series Bedienungsanleitung

Siemens

Siemens RDG200KN Bedienungsanleitung

Siemens

Siemens RDF300 Series Bedienerhandbuch

Siemens

Siemens RDH100RF/SET Bedienungsanleitung

Siemens

Siemens RDG100T Bedienungsanleitung

Siemens

Siemens 8MR2172-1A Bedienungsanleitung

Siemens

Siemens RDG100 Series Bedienerhandbuch

Siemens

Siemens Powers TH 192 S Betriebsanleitung

Siemens

Siemens RDH100RF/SET Bedienungsanleitung

Siemens

Siemens RDS110 Bedienungsanleitung

Siemens

Siemens RAG-ST.1 Bedienungsanleitung

Siemens

Siemens QAA73.110 Bedienerhandbuch

Beliebte Thermostat Handbücher anderer Marken

EWELLY

EWELLY EW-181 Bedienungsanleitung

Prolon

Prolon T1100 Montageanleitung

Computherm

Computherm Q20 Bedienungsanleitung

Heatmiser

Heatmiser neoStat Bedienungsanleitung

Mars

Mars HEAT CONTROLLER IR Wireless Thermostat Bedienungsanleitung

Saswell

Saswell SAS920XWHB-7-S-RF Leitfaden

Aircalo

Aircalo TFP1-ET85P2 Bedienungsanleitung

Honeywell

Honeywell CM721 Bedienungsanleitung

Carrier

Carrier DEBONAIR 33CS Bedienungsanleitung

Lennox

Lennox iHarmony Zone Thermostat Montageanleitung

Gemtech

Gemtech GT7000 Bedienungsanleitung

Rollei

Rollei Smartes 45000 Bedienungsanleitung

Sinope

Sinope TH1300RF Bedienungsanleitung

Honeywell

Honeywell RLV4305 Bedienungsanleitung

Honeywell

Honeywell Prestige 2.0 THX9421 Bedienungsanleitung

NuTone

NuTone NTBZ48 Original Betriebsanleitung

Stelpro

Stelpro MAESTRO ASMT402AD Bedienungsanleitung

Honeywell

Honeywell T6811 Bedienungsanleitung