United Electric Controls 800, 800S, T800, T800S, 802S Installation And Maintenance Instructions Manual

GENERAL

Temperature variations are sensed by the liquid
filled bulb which hydraulically transmits motion
through a mechanism which rotates the indicating
pointer and actuates precision snap-acting
switch(es). Controller settings are made by
turning the adjustment knob(s). Thermometer
types T800 (with enclosure) and T800S
(skeleton) provide temperature indication only
with no control switches.

Tools Needed

Screwdriver to secure

customer supplied screws

Screwdriver

5/64” Allen Wrench

INSTALL UNIT WHERE SHOCK, VIBRA-

TION AND TEMPERATURE FLUCTUA­TIONS ARE MINIMAL. ORIENT UNIT SO THAT
MOISTURE IS PREVENTED FROM ENTERING
THE ENCLOSURE. IT IS IMPERATIVE THAT
PROPERLY RATED EXPLOSION-PROOF SEAL­ING FITTINGS BE USED FOR ELECTRICAL
WIRE ENTRY OR 820E AND 822E TYPE UNITS.
DO NOT MOUNT UNIT IN AMBIENT TEMPERA­TURES EXCEEDING PUBLISHED LIMITS.

PREVENTATIVE MAINTENANCE / PERIODIC

TESTING (6 MONTHS OR SOONER AS DIC­TATED BY THE ENVIRONMENT) IS NECESSARY
TO ENSURE OPERATION OF THE PRODUCT TO
SPECIFICATION. LUBRICATE ALL PIVOT POINTS
AND MOVING PARTS, TO PREVENT CORROSION,
WITH COMPATIBLE DRY LUBRICANTS OR LIGHT
GREASE.

DO NOT KNOCKOUT ANY PLUGS ON
EXPLOSION-PROOF TYPES 820E OR 822E

When mounting 800 or 802 type controls, it may be
necessary to remove adjustment knob and front cover.
The knob is secured with a 5/64” Allen Setscrew. The
cover is secured by four screws at the corners.

MOUNTING

The controller may be mounted in any position to
either a surface or panel (1/4” thick maximum).
Locate it where vibration, shock and ambient
temperature fluctuations are minimal. It is recom­mended that mounting the unit with the conduit
connection on the top be avoided.

To Flush Mount

(Not applicable to explosion-proof types)
Cut out the panel as shown in Figure 1A. Mount
to the panel using the two holes located on the
flange of the enclosure.

To Panel Mount

(Skeletons)
Prepare the cut out, drilling the holes for the knob
shaft and the mounting holes per Figure 1B.

UNITED ELECTRIC
CONTROLS

Installation and Maintenance
Instructions

IM800-03

Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of
Recommended Practices, Liabilities and Warranties.

800 Series
Temperature Controllers and
Thermometers

Types 800, 800S, T800, T800S, 802,
802S, 802P, 802PS, 820E*, 822E*

*Explosion-Proof Class I, Groups B, C, D;
Class II, Groups E, F & G; Class III

Part I - Installation

Figure 1A - Flush Mounting

Figure 1B - Panel Mounting (Skeleton)

Clearance for #6 screw

(4) places (3/16 Max.

Panel Thickness)

Clearance for #8 screw - (2) places

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.

DISCONNECT ALL SUPPLY CIRCUITS
BEFORE WIRING.

ELECTRICAL RATINGS STATED IN LIT-

ERATURE AND ON NAMEPLATE
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 Yellow
Normally Open Blue Orange
Normally Closed Black Red

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.

To Surface Mount

(Explosion Proof Types)
820E and 822E type units must be surface
mounted. Drill mounting holes per Figure 1C.

(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 sur­face mounting the controller.

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 tem­perature compensated).

Unless otherwise specified, factory calibration,
allows for 6” of capillary tube in the control
zone. If longer lengths are required recalibra­tion 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.

Figure 1C - Explosion-Proof Mounting

Figure 1D - Surface Mounting

WIRING

Clearance for 1/4

screw (4) places

Clearance for #10
screw - (2) places

Types 800S, 802S and 802PS

(Skeleton units)
Wire directly to the leadwires, in the same
manner as above.

Types 820E and 822E

(Explosion-proof)
Connect the electrical conduit directly to the die­cast aluminum enclosure via 3/4 NPTF connec­tion. Wire directly to the terminal block. See
Figure 2D. Wiring enclosure includes grounding
terminal.

Figure 2D - Explosion Proof

Tools Needed

5/64th” Allen Wrench

5/16” Open End Wrench (2 required)

Screwdriver

1/4” Open End Wrench

9/16” Open End Wrench

Switch Settings

(Dual switch types only)
The basic enclosed and skeleton dual switch
controllers are furnished with a choice of
individual or common adjustment of set points
as described below.

Types 802 and 802S have a separate knob and
pointer for each switch. Turn black knob for
switch #2 and turn green inserted knob for
switch #1. Set points are shown by individual
pointers and may be separated up to 100% of
dial range apart, so long as the red pointer is
set higher than the green pointer.

Types 802P, 822E AND 802PS have a single
knob and pointer for both switches. Both
switches are standardly, factory set together
within 5% of the dial range. Turning the knob
positions both switch simultaneously, maintain­ing a constant separation between switches.

Replace cover and adjustment knob if removed
during installation. Controller is ready for
operation. Turn setting pointer to desired
control temperature and start up the process.
To suit particular process conditions or for
greater controller accuracy it may be desirable
to make slight alterations to the set point or
indicator reading. Procedures for making these
adjustments are described below.

Note:

Indicating Pointer Deflection:

The indicating pointers will read slightly low
when the bulb temperature is 15° above the
controller setting. This deflection is normal and
repeatable (approximately 0.5% of scale range
on single switch models) and is due to the
transference of the switching mechanism load
to the thermal system. It can be measured by
moving the setting pointer from the high to the
low end of the scale and observing the resultant
indicating pointer deflection.

Note:

Prior to making any controller adjust­ments, the cover and adjustment knobs should
be removed. When adjustments are completed,
all applicable parts should be replaced.

Part II - Adjustments

Figure 2A - Dual Switch

Figure 2B - Single Switch

Figure 2C - Terminal Block Option