Chromalox Gnit 5 Users Manual PK479 3 CHX

GNIT-5 IM-PK479

GNIT-5 to the manual 65501f46-678e-4b41-819c-f795d77b99ed

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Chromalox

®

DIVISION

4

SECTION

GNIT

SALES

REFERENCE

DATE

SERVICE REFERENCE

Installation Instructions

PK479-3

161-506172-001

AUGUST, 2006

(Supersedes PK479-2)

© 2010 Chromalox, Inc.

Model PCN Temperature Volts Max Capillary Stock

Range (˚F) Amps. Length (Ft.)

GNIT-5 360946 30 to 220 120/240 25 5 S

GNIT-12 360954 30 to 220 120/240 25 12 S

Specifications —

Other temperature ranges available. Contact your local Chromalox Sales office.

Features:

• Rugged Design

• Moisture and Corrosion Resistant

• Teflon®Covered Capillary/Bulb

• Large Setpoint Dial

• Easy Installation

• Line Voltage

• DPST 25 Amp Switch

GENERAL

FIRE/EXPLOSION HAZARD. This thermostat is not

intended for use in hazardous atmospheres where

flammable vapors, gases, liquids or other com-

bustible atmospheres are present as defined in

the National Electrical Code. Failure to comply can

result in personal injury or property damage.

NOTICE: Type GNIT Thermostats are designed for temperature

control service only. Because they are not fail safe, they should

not be used for temperature limiting duty.

The system designer is responsible for the safety

of this equipment and should install adequate

back-up controls and safety devices with their

electric heating equipment. Where the conse-

quences of failure could result in personal injury or

property damage, back-up controls are essential.

The GNIT Non-Indicating Corrosive Resistant Thermostat is

designed for applications in atmospheres where corrosive material is

present. The double pole/single throw thermostat is available with

either a 5 foot or 12 foot copper capillary which is sleeved with

Teflon®. The Teflon®also covers the bulb. The thermostat is

designed for 25 amperes resistive loads for either 120 or 240 Vac.

Specifications:

Range 30 to 220˚F

Switch Action DPST (Double Pole/Single Throw)

Current 25 Amperes, 120 or 240 Vac

Accuracy ±9˚F

Load Lamp 120 Vac or 240 Vac

Capillary Length GNIT-5, 5 Foot

GNIT-12, 12 Foot

Diameter of Teflon®Cover 5/16” OD

Application Notes

1. Customer external fuse required.

Process Temperature Differential — is variation in controlled

process temperature between maximum, when thermostat turns

OFF and minimum, when thermostat turns ON. This spread in

temperature may be minimized by:

1. Making sure control is mounted to vertical surface. (See Step 1,

MOUNTING.)

2. Avoid excess heating capacity (oversized heaters).

3. Locating control sensing bulb in optimum position between

heat source and work.

MOUNTING

Note: Do not mount thermostat where it will be subject to vibra-

tion or shock. Do not mount adjacent to a large magnetic contac-

tor, as vibration and shock will cause thermostat to interact errati-

cally — resulting in chattering of the contactor.

The air temperature in and around the thermostat enclosure

should be kept as near to normal room temperature as possible…

never above 150˚F or below 30˚F.

1. Thermostat must be mounted in a vertical position only.

2. Use sheet metal or wood screws through the four 1/4” diame-

ter mounting holes in baseplate to mount control.

GNIT Moisture and Corrosion

Resistant Industrial Thermostat

Teflon®is a registered trademark of DuPont Co.

WIRING

ELECTRIC SHOCK HAZARD. Disconnect all power

before installing or servicing thermostat. Failure

to do so could result in personal injury or property

damage. Thermostat must be installed by a quali-

fied person in accordance with the National

Electrical Code, NFPA 70.

ELECTRIC SHOCK HAZARD. Any installation

involving thermostats must be performed by a

qualified person and must be effectively grounded

in accordance with the National Electrical Code to

eliminate shock hazard.

1. Electric wiring to thermostat must be installed in accordance

with the National Electrical Code and with local codes by a quali-

fied person. CAUTION: Use copper conductors only.

2. Entrance for wiring is provided by two 1/2” conduit

holes on each side of the unit.

3. Remove four face mounting screws and pull off front cover.

4. Connect wires according to wiring diagrams (Figures 2 & 3).

5. Replace cover and tighten screws.

6. Note: If load amperage or voltage rating exceeds switch rat-

ing, a contactor must be used. Contactor and wiring to be sup-

plied by customer.

1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086

Phone: (615) 793-3900 www.chromalox.com

MOUNTING

3. NOTICE:

A. Do not bend or deform sensing bulb. This will alter control

calibration.

B. Do not kink capillary tube. The resulting constrictions in

fluid flow can destroy control function or broaden tempera-

ture differential. Minimum capillary tube bending diameter

is 1/2” I.D.

C. Any deformations of bulb or capillary that result in leakage

of fluid from control renders control inoperative.

D. Avoid passing control capillary tube through zones which

have temperatures in excess of controlled process tempera-

ture. Erratic control or destruction of control function may

result.

P

NR25

10 AWG

Amber

Neutral

(White)

120V 25 Amps Max Line

Fused Disconnect

By Customer

Hot

(Black)

Ground

(Green)

Nut supplied to

ground control.

Wire Nut

Heater Load

(Black)

Ground

(Green)

CC

NO NO

Connect heater leads

to wire nut provided

and one side of the

terminal block.

Connect heater ground

to ground screw on NR25.

Connect hot line to

screw terminal provided and

neutral line (with pilot light &

heater lead) to wire nut provided.

Connect ground nut on NR25.

P

NR25

10 AWG

Amber

240V 25 Amps Max Line

Fused Disconnect

By Customer

Ground

(Green)

Nut supplied to

ground control.

Wire Nut

Heater Load

(Black)

Ground

(Green)

CC

NO NO

Connect wire to 0.250" screw-on

connector. Connect heater lead, pilot light

lead, and wire from control to wire nut

provided. Connect the other heater lead to

the terminal block. Connect heater ground

with grount nut on NR25.

Connect power to 0.250"

screw-on connectors

provided. Connect ground to

ground nut on NR25.

120 Volt 240 Volt

Note: Dotted lines represent wiring by

customer. 10 AWG wire recommended.

Note: Dotted lines represent wiring

by customer. 10 AWG MTW or

THHN wire recommended.

Figure 2 Figure 3

Figure 1

4.25

2.63

5.88

3.75

7.13

0.44

0.44

3.38

Side View

Front View

Note: Terminals provided for ther-

mal fuse or other remote shutdown

device. If no remote device, termi-

nals must be jumpered. Note: Terminals provided

for thermal fuse or other

remote shutdown device. If

no remote device, termi-

nals must be jumpered.

Limited Warranty:

Please refer to the Chromalox limited warranty applicable to this product at

http://www.chromalox.com/customer-service/policies/termsofsale.aspx.