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To Surface Mount
(Explosion Proof Types)
820E and 822E type units must be surface
mounted. Drill mounting holes per Figure 1C.
Clearance for 1/4
screw (4) places
F
igure 1C - Explosion-Proof Mounting
(Option M449)
Attach 2 mounting ears found in separate
package to recessed areas on back side of
enclosure by means of 2 self-tapping screws.
Mount to surface per Figure 1D. On dual switch
explosion-proof types requiring seal fitting,
install the nipple and the seal fitting prior to sur-
face mounting the controller.
Clearance for #10
screw - (2) places
Figure 1D - Surface Mounting
Mounting Bulb and Capillary
Fully immerse the bulb and 6" of capillary in the
control zone. For best control it is generally
desirable to place the bulb close to the heating
or cooling source in order to sense temperature
fluctuations quickly. Be sure to locate the bulb
so it will not be exposed to temperature beyond
the instruments range limits.
Try to place the remaining capillary adjacent
to the control head so it will sense the same
ambient temperatures (control is ambient tem-
perature compensated).
Unless otherwise specified, factory calibration,
allows for 6" of capillary tube in the control
zone. If longer lengths are required recalibra-
tion may be necessary. Follow the procedure
outlined in PART II.
'C' style bulbs can be coiled or shaped to fit the
installation. Avoid sharp bends and coils tighter
than a 2" radius. Do not bend 'B' style bulbs.
Avoid bending or coiling the capillary tube tighter
than 1/2" radius. Exercise caution when making
bends near the capillary ends.
If a separable well or union connector is used
follow separate instructions included with them.
WIRING
DISCONNECT ALL SUPPLY CIRCUITS
BEFORE WIRING.
ELECTRICAL RATINGS STATED IN LIT-
ERATURE
AND
SHOULD NEVER BE EXCEEDED. OVERLOAD
ON A SWITCH CAN CAUSE FAILURE ON THE
FIRST CYCLE.
WIRE UNITS ACCORDING TO LOCAL
AND NATIONAL ELECTRICAL CODES.
MAXIMUM RECOMMENDED WIRE SIZE IS 14
AWG.
Types 800, 802, 802P
(Enclosed units)
Connect the electrical conduit to the case
securing it with the grounding locknut supplied.
Note: Unless control is connected to a metallic
conduit, grounding bushing should be removed
from grounding wire. A separate conductor should
be provided from grounding system directly to the
non-current carrying metal parts of control (splice
the grounding wire).
Conduit opening is available on the left side as
standard. It can be supplied on the right side on
request. See PART III, option M007. Wire through
the 7/8" conduit hole directly to the lead-wire(s)
provided, color coded as follows, or to the optional
terminal block.
Switch 1 Switch 2
Common
Violet
Normally Open
Blue
Normally Closed
Black
Avoid bending or coiling the capillary tube
See wiring Diagrams Figure 2A and 2B.
Optional terminal block wiring is available for
single or dual switch controls (option M100).
See Figure 2C.
ON
NAMEPLATE
Yellow
Orange
Red
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