INSTALLATION GUIDE
23
INSTALLATION OF STACK PROBE FOR PDS 1:
A stack probe is used with the Draft
Switch. The Draft
Switch monitors the pressure inside the stack and sig
-
nals the control to shut down the appliance if insuff-
cient draft exists inside the stack. The probe must be
installed between the appliance and the exhaust fan.
PDS Must best accessible for maintenance.
Mechanical Installation
INSTALLATION OF DRAFT SWITCH
The Draft Switch is for indoor installation only. The
Draft Switch
must be installed in a vertical position
with the pressure connection pointing down. Secure
the switch by using the mounting holes as shown.
After installation connect the tubing from the probe
onto the port marked accessible through the small of
the plastic enclosure. Connect tubing to the NEGA
-
TIVE (-) port on the Draft Switch.
Factory wiring comes with three wires that are already
crimped onto the Draft Switch. The purpose of these
wires is to provide a point in which you can extend the
length of the wire by using wire nuts and additional
wire (not provided).
Draft Switch
C
NC
NO
CONNECTION FOR TUBING
AT THE BOTTOM OF THE
ENCLOSURE
MOUNTING HOLES
PROBE
END CAP
SELF TAPPING SCREWS
(RECOMMENDED ¼ - 20 OR M6)
(NOT PROVIDED)
GASKET
BRACKET ASM.
FERRULE
BL_ST_INSTL_RevB_4.08.19
