Installation Instructions

599 Series Zone Valves
Installation Instructions
Document No. 129-335
April 1, 2021
SFA/SFP Electronic Valve Actuator
2-Position Control
Item Number 129-335, Rev. DA Page 1 of 4
Product Description
The SF Series actuator requires a 24 Vac, 120 Vac, 208 Vac,
or 277 Vac Class-2 supply signal to control Siemens Zone
Valves with a 1/10-inch (2.5 mm) stroke.
Warning/Caution Notations
WARNING:
Personal injury or loss of life
may occur if you do not follow
a procedure as specified.
CAUTION:
Equipment damage or loss of
data may occur if you do not
follow a procedure as
specified.
Product Numbers
Actuator
Model
Power
Supply
Actuator
Code
Normally
Open
SFP71U
24 Vac
243
SFP11U
120 Vac
241
SFP277U/25G**
277 Vac
– *
SFP208U/25G**
208 Vac
– *
Normally
Closed
SFA71U
24 Vac
242
SFA11U
120 Vac
240
SFA208U/25G**
208 Vac
– *
SFA277U/25G**
277 Vac
– *
* Actuator only, with 2.5-meter cable,
not available as an assembly.
**Order in multiples of 10
Contents
One actuator
Required Tools
• Small flat-blade screwdriver
• Wire stripper
Estimated Installation Time
20 minutes
Figure 1. Acceptable Mounting Positions.
The vertical position is recommended for mounting.
Prerequisites
WARNING:
1. If mounting the actuator to a valve already
in line:
• Close the shut-off valves in the piping
(upstream first, then downstream).
Or
• Switch off the pump to allow the
differential pressure in the valve to
drop.
2. Disconnect the controller power before
replacing the actuator.
WARNING:
Actuators must not be exposed to
condensed/dripping water. If the actuators
are installed below piping that can drip
condensate, either the actuator needs to be
protected by shielding to deflect the water drip
or the piping needs to be insulated
to prevent condensation.
WARNING:
Actuator housing must not be in contact, or
close proximity to adjacent hot water supply or
return piping.
Loosen retaining ring and rotate actuator if
necessary, to avoid proximity or contact with
hot water supply or return piping, then re-
tighten ring to maintain desired orientation.
CAUTION:
Actuator life may be reduced under either of
these conditions:
• Use of SFP actuators in hot water
systems that remain operational all year
long, with actuators continually
commanded closed during the non-
heating season
• Use of SFA actuators in chilled water
systems that remain operational all year
long, with actuators continually
commanded open during the non-
cooling season