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POWER SUPPLY
LEADS
L BRACKET
REMOVE
KNOCKOUT
IN COVER
NOTE:
IF AIR CLEANER IS MOUNTED HORIZONTALLY WITH THE POWER
SUPPLY ON BOTTOM, THE SAIL SWITCH MUST BE MOUNTED AT
A 45 DEGREE ANGLE FROM VERTICAL.
Fig. 8. Mount sail switch on back of power supply.
6. Make wiring connections to the N.C. (normally
closed) and COM (common) screw terminals in the
sail switch.
7. Replace sail switch cover.
WIRING
CAUTION
Electric shock hazard.
Can cause electrical shock or equipment damage.
Disconnect power supply before wiring.
All wiring must comply with local electrical codes and
ordinances. When controlling more than one device, make
certain that the total electrical load does not exceed the
switch rating (see Specifications).
SHEET
METAL
SCREWS (20)
8-32
SCREWS(2)
SAIL SWITCH
M3011A
Typical wiring hookups that have the switching action at
the sail switch are shown in Fig. 9. Normally open and
normally closed refer to the contact when the switch is in
the de-energized position.
EAC
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
TERMINAL DESIGNATIONS ARE FOR POWER OFF: N.O.-NORMALLY
OPEN, N.C.-NORMALLY CLOSED, C.-COMMON.
Fig. 9. Typical wiring hookups using sail switch to
energize electronic air cleaner.
OPERATION AND CHECKOUT
OPERATION
The sail switch has a spdt switch, which permits different
hookups for controlling auxiliary equipment in a heating-
cooling system. The hookups in Figs. 9 and 10 show
systems where the controlled equipment operates only
when the system fan operates. When the fan produces
250 fpm air velocity, the normally open contacts make,
turning on the auxiliary equipment. When the air velocity
decreases to 75 fpm, the normally open contacts break,
turning off the auxiliary equipment. The hookup in Fig. 10
shows a system where auxiliary equipment operates when
the system fan is off. When the fan produces 250 fpm air
velocity, the normally closed contacts break, turning off the
auxiliary equipment. When the air velocity decreases to
75 fpm, the normally closed contacts make, turning on the
auxiliary equipment.
CHECKOUT
When installation is complete, operate equipment through
one complete cycle to make sure sail switch functions as
described in OPERATION section above.
5
S688A SAIL SWITCH
WHITE
L2
L1
S688A
(HOT)
COM. N.O.
N.C.
BLACK
2
M3013A
60-2103EFS—01
1
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