Weatherproof Thermostat
EVENTHERM TH-4-20
Page 1 of 2
English User instruction Version #5
Created on 09/02/2010 11:52 AM
Picture 1
Picture 2
Picture 3
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 plastic enclosure. The
adjustable knob pointer disc allows the thermostat to be
recalibrated.
This EVENTHERM TH-4-20 thermostat is resistant to
moisture and gases found in corrosive agricultural
buildings. The TH4-20 will provide accurate
temperature control with long life in livestock
confinement buildings, greenhouses, warehouses and
industrial buildings.
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.
0531
01
1
2
4
3
054
8
02
THERMOSTAT GROUND TERMINAL
BORNE DE TERRE
WATERPROOF & RAINTIGHT
ENCLOSURE.
ELECTRIC SPECIFICATION APPLIES
TO BOTH CONTACT SETS.
USE COPPER CONDUCTORS ONLY.
BOÎTER IMPERMÉABLE
CARACTÉRISTIQUES ELECTRIQUES
VALABLES POUR LES DEUX ENSEMBLES
DE CONTACTS
UTILISEZ FIL DE CUIVRE SEULEMENT
COOLING
REFROID.
LINE IN
L ENTRÉE
HEATING
CHAUFF.
VOLTAGE A.C. 50 or 60Hz
RESISTIVE LOAD NON INDUCTIVE AMPS
FULL LOAD AMPS @ PF 0,7
LOCKED ROTOR, AMPS
DC MAX LOAD @ 40V. 10 AMPS
PILOT DUTY (VA)
VOLTS A.C. 50 ou 60Hz
AMP. AVEC CHARGE NON INDUCTIF
AMP. AVEC CHARGE MAX. COS
AMP. AVEC ROTOR BLOQUANT
CD CHARGE MAX. AU 40V. 10 AMP.
CHARGE NOMINAL (VA)
240
16
3
30
120
16
5
30
120
Type TH-4-20
Wiring Diagram:
Schéma de branchement:
Tset
100902
