1.3

Mounting

The Model TK1 Liquid Level Switch is available with a

flange mountings.

1.3.1 Threaded Mounting

mounting threads to prevent galling. Engage thread by hand

to avoid damage. Using a pipe wrench, rotate the unit

clockwise until threads are tight in mounting. Ensure that

the N.O. marking on body is upward for normally opened

operation on models with SPST switches. For normally

closed operation, ensure that the N.C. marking is upward.

Models with SPDT or DPDT switches should be mounted

with the N.O. marking upward.

1.3.2 Flanged Mounting

Have proper flange bolting and gasket(s) on hand. Carefully

align the bolt holes of the TK1 flange with those of the

vessel mounting flange. Ensure that the N.O. marking on

body is upward for normally opened operation on models

with SPST switches. For normally closed operation, ensure

that the N.C. marking is upward. Models with SPDT or

DPDT switches should be mounted with the N.O. marking

upward. Ensure that the flange gasket is seated properly.

Install flange bolting.

Caution: Operation of all buoyancy type level devices should be done

in such a way as to minimize the action of dynamic forces on

the float or displacer sensing element. Good practice for

reducing the likelihood of damage to the control is to equal-

ize pressure across the device very slowly.

1.4

Wiring

NOTE: A switch or circuit breaker shall be installed in close proximity to

equipment and within easy reach of operator. It shall be marked

as the disconnecting device for the equipment.

NOTE: For supply connections in installations with ambient tempera-

ture up to +70° C, use wire with a minimum rating of 75° C as

required by the process conditions. Installations with ambient

temperatures up to +80° C require wire with a minimum rating

of 85° C as required by the process conditions. Use a minimum

of 14 AWG wire for power and ground field wires.

1. SPST reed switch: Connect wiring to switch leads or terminals

per wiring diagram. See figure 1.

2. SPDT reed switch: Connect wiring to proper switch leads

or terminals per wiring diagram. See figures 2 and 4.

3. DPDT relay: Connect wiring to proper switch leads and

run power supply according to the wiring diagram. See

figure 3. This relay must be powered to function. 5A @

24 VDC relay requires 24 VDC power supply while the

5A @ 120 VAC relay requires 120 VAC power supply.

NOTE: Observe all applicable electrical codes and proper wiring

procedures.

44-608 TK1 Liquid Level Switch

4

Figure 1

SPST wiring diagram

Figure 2

SPDT wiring diagram

Figure 3

DPDT wiring diagram

Figure 4

SPDT Flying leads wiring diagram

toswitch

toswitch

NO

NC

notused

C

toswitch

BROWN

N.O.

GRAY

COM.

YELLOW

N.C.

BLUE

N.O.

WHITE

COM.

ORANGE

N.C.

RED

120VACor

24VDC

LEVELSWITCH

N.O.

RED

red

NC (make on low)

orange

NO (make on high)

black

C