Siemens QFA1000 User manual

Installation Instructions

Document No. 129-604

July 13, 2010

QFA1000, QFA1001 Room Hygrostats

Item Number 129-604, Rev. AA Page x of x

Product Description

These instructions explain how to install a QFA1000

or QFA1001 Room Hygrostat.

Product Numbers

QFA1000 Internal Setpoint

QFA1001 External Setpoint

Required Tools

•7 mm flat-blade screwdriver

•Phillips head screwdriver

•Two 6 × 32 screws

•Electric drill

Expected Installation Time

10 minutes

Prerequisites

The base has cable entries at the rear for mounting

the room hygrostat on recessed conduit boxes. For

wall mounting, appropriate holes at the top or bottom

can be knocked out.

Mounting Location

The hygrostat should be mounted:

•on an inner wall approximately 4.9 feet

(1.5 m) above the floor, and at least 1.6 feet

(0.5 m) from the closest adjoining wall.

•where there is a natural circulation of room

air (do not mount near drafts, in corners,

behind curtains, too close to doors and

windows, or on an outer wall).

•away from sources of heat and refrigeration

(radiators, computers, televisions, concealed

heating pipes, hot or cold water pipes).

•where it is not exposed to direct sunlight.

SEN0576R1

Figure 1. Recommended Mounting Locations.

Installation

1. Using a 7 mm flat-blade screwdriver, insert the

blade into one of the slots on the side of the

housing base. Pry the base away from the

housing cover.

2. Do the same for the second slot, so that the

cover loosens from the housing base.

3. Flip open the hygrostat cover.

SEN0577R1

(~7 mm)

(>5mm)

>0.20

0.27

Figure 2. Opening the Unit.

4. Before mounting the hygrostat, run the cable

through the back of the housing, and terminate

the lead wires appropriately, based on how the

unit is intended to operate (either switching on

humidification or on de-humidification). See

Figures 4 and 5.

Document No. 129-604

Installation Instructions

July 13, 2010

5. Attach the base of the hygrostat to the wall using

two 6 × 32 screws. (Screws are not provided.)

Place the screws opposite each other in the

housing, as appropriate, to achieve a solid

mounting. (See Figure 3.)

SEN0578R1

Figure 4. Humidification.

Figure 3.

Wiring Diagrams

Figure 5. Dehumidification.

SEN0579R1

Var. 2

Var. 1 Var. 2

max. Ø 0.39

(max. Ø 10 mm)

max. Ø 0.27

(max. Ø 7 mm)

Var. 1

Figure 6. QFA1001 Pictured.

Page 2 of 3 Siemens Industry, Inc.

Document No. 129-604

Installation Instructions

July 13, 2010

Setpoint Setting

QFA1000:

1. Set the humidity setpoint to the desired setting. (See Figure 7.)

2. Replace cover.

3. Device will be activated when wiring is terminated to the controller.

SEN0580R1

–

= 55 H%

= 80 H%

= 90 H%

Figure 7. QFA1000 Setpoint Setting.

QFA1001:

1. Replace cover, aligning external setpoint knob to internal setpoint.

2. Adjust setpoint.

SEN0581R1

Figure 8. QFA1001 Setpoint Setting.

The installation is now complete.

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and

models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective

Siemens Industry, Inc.

Building Technologies Division

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

U.S.A.

Your feedback is important to us. If you have

comments about this document, please send them

to SBT_technical.editor.[email protected]

Document No. 129-604

Printed in the USA

Page 3 of 3

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