Advertisement
Fig. l-Mount eaii switch in one of positions
shown for eibow turning vanes or sweep radius
is recommended.
ALTERNATE
LOCATION. MOUNT SAIL
SWITCH ON THIS SIDE
OF DUCT, OPPOSITE
AIR ENTRANCE. >
I
DOWNSTREAM
Fig. 2-hIlount eaii switch on center iine of duct
in one of angle-t positions shown for junction
duct work.
UPSTREAM
/ BEST LOCATION \
--1-1
RETURN AIR DUCT
STREAM
Fig. 3-Mount saii switch in one of positions
shown for angle-t junction duct work. Transi-
tion in trunk is recommended.
OUCT OPPOSITE AIR
ENTRANCES AS SHOWN.
DOWNSTREAM
UPSTREAM
MINIMUM
RETURN AIR
15 in. [381 mm] MINIMUM
DO NOT MOUNT ON
I
UPSTREAM
I
AIR DUCT
least 12 in. [305 mm] deep and 8 in. [203 mm] wide
must beat
to allow operation of the sail without affecting the smooth
flow of akin the duct. Airflow at the location may beverticai
(up or down) or horizontal.
NOTE: When S688 is mounted in warm air, the sail life may
be reduced.
Refer to Figs. 1-3 for the best duct mounting location.
Mount the switch at least 6 in. [152 mm] upstream from an
elbow or junction, and at least 15 in. [381 mm] downstream
from an ellmw or junction. The switch must be located on the
opposite side of the duct from the air entrance.
ADAPT SWITCH TO AIR FLOW DIRECTION
The S688A Saii Switch is provided with two counterbal-
ancing springs in place as shown in Fig. 4. These springs
Never use the sail switch with both springs
IMPORTANT:
attached.
Fig. 4-Adapting saii switch to air flow direc-
tion.
F O R
V E R T I C A L
00WNWARO AIR FLOW
REMOVE DOWN SPRING (
FOR VERTICAL UPWARO
AIR FLOW
6
Adapt the sail switch to mounting position. (F52 requires
special instructions; see separate instructions.)
Standard Application
Horizontal air flow-remove both springs.
Vertical upward air flow-leave in place the spring that
is attached to the bracket marked up. Remove the
spring that is attached to the bracket marked abwn.
Vertical downward air flow-leave in place the spring
that is attached to the bracket marked down. Remove
the spring that is attached to the bracket marked up.
3
S688A
INSTALLATION
\
60-2103-3
Advertisement
