White Rodgers 770-1 - Manual (Page 2)

MOUNTING INSTRUCTIONS
H 3
^ 9 =
_0_
IsJ
The Air Switch must be mounted to a vertical surface, as shown in above draw­
ings to assure that diaphragm will be in a vertical plane.
SEE BACK PAGE FOR MOUNTING DIMENSIONS.
WIRING
All wiring should be done according to local and national electrical codes and ordinances.
Fig. 1 - SPOT Switch of Type 770-1.
The SPDT switch can be actuated by a positive or negative pressure, or by a
differential of pressure. This control is ideally suited for residential applica­
tions such as Electronic Air Cleaners and Humidifiers, but it is equally well
suited for commercial installations, including applications where alarm circuits
are required.
(Without pressure applied to
diaphragm, switch contacts
are In position shown.)
Fig. 2 - Typical Air Cleaner Installation. Fig. 3 - Typical Humidifer Installation.
NEUTRAL
HOT
AIR SWITCH
SAMPLE LINE CONNECTIONS •
r +
L
POSITWE ON LY
LO WER NEG A TIVE
H I G HE R P O S rrrv ' L
O
NEGATIVE ONLY
HIGHER NEGATI VE
L OW E R P O S I T I VE
E F
Male externally threaded with nut and
self-aligning ferrule.
POSITIVE PRESSURE ONLY:
Connect sample line to E; F remains open to
atmosphere.
NEGATIVE PRESSURE ONLY;
Connect sample line to F; E remains open to
atmosphere.
TWO NEGATIVE SAMPLES:
Connect highest negative sample to F; lower
sample to E.
TWO POSITIVE SAMPLES:
Connect highest positive sample to E; lower
sample to F.
ONE POSITIVE AND ONE NEGATIVE:
Connect positive sample to E; connect n^a-
tive sample to F.
SEE NEXT PAGE FOR LOCATION OF SAMPLE LINES.