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S688A SAIL SWITCH
SPECIFICATIONS
Full Load
Locked Rotor
Resistive
Switching Action: Spdt snap-acting switch.
Sail Data:
Insertion length: 10 in. (254 mm).
Maximum width: 5 in. (127 mm).
Approximate area: 26.2 in
Material: Polyester film sealed on music wire frame.
Minimum air flow:
N.O. Contacts:
Makes: 250 fpm.
Breaks: 75 fpm.
N.C. Contacts:
Makes: 75 fpm.
Breaks: 250 fpm.
Maximum ambient temperatures:
125 °F (52 °C) at switches.
170 °F (77 °C) at sail.
Case Dimensions: 2-5/16 in. (59 mm) high,
3-3/4 in. (95 mm) wide, 2-1/8 in. (54 mm) deep.
Duct Mounting Hole Dimensions:
1-1/2 in. (38 mm) by 2-1/4 in. (57 mm).
Mounting Means: Switch mounts on return air duct with
two sheet metal screws. An adhesive backed mount-
ing template is provided. Sail is inserted into duct
through 1-1/2 in. (38 mm) by 2-1/4 in. (57 mm) hole.
Mounting Position: Mounts in vertical (up or down) or hor-
izontal air flow.
Wiring Knockouts: 1/2 in. (13 mm) conduit knockout in
either end of case.
Finish: Zinc plated case and cover.
Replacement Parts: Part no. 123773A Replacement Sail.
Underwriters' Laboratories, incl listed: File No. E4436,
Guide No. XAPX. For use in ambient temperatures
normally prevailing in occupiable spaces, which usu-
ally are not higher than 77 °F (25 °C) but occasion-
ally may be as high as 104 °F (40 °C) for brief periods.
60-2103EFS—01
Table 1. S688A Electrical Ratings
N.O. Contacts
24 Vac 120 Vac 240 Vac 24 Vac 120 Vac 240 Vac
2.0
2.0
12.0
12.0
5.0
5.0
2
2
(1690 mm
)
N.C. Contacts
1.0
1.0
1.0
6.0
6.0
6.0
2.5
2.5
2.5
INSTALLATION
When installing this product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service tech-
nician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Disconnect power supply before beginning
installation to prevent electrical shock or
equipment damage.
Location
Locate the sail switch in the return air duct where the sail
will be in the direct path of an unrestricted air stream.
Maximum ambient temperature at the switch is 125 °F
(52 °C) and at the sail is 170 °F (77 °C). The air duct must
be at least 12 in. (305 mm) deep and 8 in. (203 mm) wide to
allow operation of the sail without affecting the smooth
flow of air in the duct. Airflow at the location may be vertical
(up or down) or horizontal.
ALTERNATE
LOCATION MOUNT SAIL
SWITCH ON THIS SIDE
OF DUCT,OPPOSITE
AIR ENTRANCE.
DOWNSTREAM
Fig. 1. Mount sail switch in one of the positions shown
for elbow turning vanes or sweep radius is
recommended.
2
0.5
3.0
2.5
UPSTREAM
6 (152)
MINIMUM
RETURN AIR
BEST
LOCATION
15 (381) MINIMUM
DO NOT MOUNT ON
THIS SIDE OF DUCT.
RETURN AIR DUCT
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