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
1
3
2
(~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
3
2
1
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
13
2
+
–
= 55 H%
1
2
3
= 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
owners. © 2010 Siemens Industry, Inc.
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
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Document No. 129-604
Printed in the USA
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