EVENTHERM TH-4-20 Manual

The TH-4-20 thermostat is designed to provide precise
control of heating, cooling, and ventilation systems.
A stainless-steel sensing coil is mounted on the side of
the weatherproof ABS
adjustable knob pointer disc allows the thermostat to be
recalibrated.

INSTALLATION

1. Installation may only be done by a qualified engineer; the
local electrical code needs to be respected.
Install a cable gland and when required remove the knock-out
located on bottom of enclosure to install a second cable gland
(To remove the knock-out: break through the groove in several
places with a screwdriver). Use only an approved conduit or
cable gland.
2. Mount TH-4-20 using the 3 flanges on outside of plastic
enclosure.
3. Pull off the knob and remove the cover of enclosure for
wiring.
4. Connect wires to appropriate terminals (heating or cooling)
and protective ground terminal. (See wiring example picture 1
and wiring diagram picture 2.)
Check wiring. Set dial to 38° C (100° F). (Full clock wise)
5. Install lid and knob for safety.
Connect power supply. Heating unit should come on (or cooling
should remain off). Turn dial down to 5° C (41° F). H eating unit
should shut off (or cooling turn on) as dial passes current room
temperature. Turn dial back to 38° C (100° F). Heatin g should
again turn on (or cooling off).
5. Tighten screws.
6. Install knob respecting the flat side on the shaft.
7. Set dial to desired temperature.

CALIBRATION

This thermostat is carefully calibrated before shipment.
Sometimes mechanical thermostats can lose calibration. If this
happens, the adjustable knob allows the thermostat to be
recalibrated.
To recalibrate, follow these steps:
1. Place accurate thermometer next to stainless steel spiral
sensor. Allow thermometer to reach room temperature (15
minutes to be safe) and be sure to keep hands away from spiral
sensor to prevent inadvertent heating. After temperature
stabilization turn the knob so the thermostat clicks, turn the knob
back so it clicks again. Turn the knob so it sits just between the 2
clicks. (Picture 3 (1))
2. When the thermometer reading and the knob temperature
reading are not the same (+/-1° C or +/-1,8 ° F) you may consider
to recalibrate the thermostat.
3. Release the Phillips screw in the side of the knob grip, 1 to 1
1/2 rev. to unlock the knob grip and the knob pointer disc parts.
(See Picture 3 (2))
4. Hold the knob grip securely with the fingers of one hand so it
cannot rotate or move position. Turn the knob pointer disc with
the other hand so the white arrow points to the same
temperature as the thermometer is reading. (See Picture 3 (3))
5. Check if click temperature is around the thermometer
temperature reading. If not, repeat step 4.
6. Tighten Philips screw to lock knob grip and knob pointer disc
part. (See Picture 3 (4))
7. This completes the calibration procedure.
Page 1 of 2
Weatherproof Thermostat
EVENTHERM TH-4-20
plastic enclosure. The
English User instruction Version #5
This EVENTHERM TH-4-20 thermostat is resistant to
moisture and gases found in corrosive agricultural
buildings. The TH4-20
temperature control
confinement buildings, greenhouses, warehouses and
industrial buildings.
Picture 1
Type TH-4-20
WATERPROOF & RAINTIGHT
ENCLOSURE.
BOÎTER IMPERMÉABLE
ELECTRIC SPECIFICATION APPLIES
TO BOTH CONTACT SETS.
CARACTÉRISTIQUES ELECTRIQUES
VALABLES POUR LES DEUX ENSEMBLES
DE CONTACTS
USE COPPER CONDUCTORS ONLY.
UTILISEZ FIL DE CUIVRE SEULEMENT
THERMOSTAT GROUND TERMINAL
VOLTAGE A.C. 50 or 60Hz
VOLTS A.C. 50 ou 60Hz
RESISTIVE LOAD NON INDUCTIVE AMPS
AMP. AVEC CHARGE NON INDUCTIF
FULL LOAD AMPS @ PF 0,7
AMP. AVEC CHARGE MAX. COS
LOCKED ROTOR, AMPS
AMP. AVEC ROTOR BLOQUANT
DC MAX LOAD @ 40V. 10 AMPS
CD CHARGE MAX. AU 40V. 10 AMP.
PILOT DUTY (VA)
CHARGE NOMINAL (VA)
Picture 2
2
4
Picture 3
Created on 09/02/2010 11:52 AM
will provide accurate
with long life in livestock
Wiring Diagram:
Schéma de branchement:
T set
BORNE DE TERRE
120
16
5

30
120
1
240
16
3
30
3