Ouellet OTH557 User manual

OTH550 & OTH557 400-612-003-D 2009-06-23 1/2
The OTH550 & OTH557 thermostats are designed to control an elec-
tric heating system such as a baseboard heater, a radiant ceiling, a
radiant floor, a convector or a fan-forced convector.
These thermostats cannot be used with:
• a resistive load under 1.25 A (OTH550) or 2 A (OTH557)
• a resistive load over 16.7 A
• a system driven by a contactor or a relay (inductive load)
• a central heating system
SUPPLIED PARTS
• One (1) thermostat
• Two (2) 6-32 mounting screws
• Two (2) solderless connectors
• One (1) adapter plate with two (2) mounting screws (OTH557 only)
The installation must be carried out by an electrician and must
comply with local electrical codes.
CUT POWER TO THE HEATING SYSTEM AT THE MAIN
ELECTRICAL PANEL TO AVOID ANY RISK OF ELECTRI-
CAL SHOCK.
Loosen the screw and
remove the faceplate
of the thermostat from
its wallplate.
NOTE: The screw
remains captive on the
wallplate.
Make the connections using solderless connectors for copper wires.
The thermostat wires are non-polarized; this means either wire can
be connected to either terminal.
WARNING: This thermostat has tinned copper wires for line and load
connections. Special CO/ALR solderless connectors must be used
when connecting with aluminium conductors.
Set the configuration switches on the
back of the thermostat’s faceplate (see
section 3).
Install the faceplate of the thermostat
back on the wallplate and tighten the
screw.
NOTE: If there is a protective film or
sticker on the thermostat’s screen, peel it
off.
Apply power to the thermostat. Verify the installation by checking that
the heater can be turned On and Off by raising and lowering the set-
point using the and buttons.
NOTE: Keep the air vents of thermostat clean and unobstructed at all
times.
nDescription 1.
oInstallation 2.
Temperature
display
Temperature
adjustment
buttons
Keypad lock
Heating intensity
Appears when the thermostat
is configured for a fan-forced
heater.
Electrical
panel
Heater
Electrical
box
Thermostat
Electrical
panel
Heater
Electrical
box
Thermostat
Adapter plate
Required only for
OTH557 (347 V).
Install the wallplate to the electrical box.
OTH550 & OTH557
Installation and User Guide
Electronic Thermostats

OTH550 & OTH557 400-612-003-D 2009-06-23 2/2
The configuration switches are on the back of the thermostat. The
factory settings are indicated by the gray cells in the following table.
nPress the and buttons simultaneously for three seconds to
enter the configuration menu.
oPress the or button to set the displayed parameter.
pPress the and buttons simultaneously for one second to
display the next parameter.
qPress the and buttons simultaneously for three seconds to
exit the configuration menu.
NOTE : The thermostat will automatically save any changes made and
return to its normal display if you do not press any button for one minute.
The thermostat normally displays the actual temperature.
• To view the setpoint temperature, press
once on either temperature adjustment
button. The setpoint temperature will
appear for 5 seconds. The icon
appears when the setpoint is displayed.
• To change the setpoint temperature,
press the appropriate button until the
desired value is displayed.
• The screen is backlit for 10 seconds when any button is pressed.
During a power outage, the setpoint is saved in memory. You do not
need to adjust the temperature when power returns.
*The OTH557 model is not suitable for residential use.
Setpoint range: 5 °C to 30 °C (41 °F to 86 °F)
Display range: 0 °C to 60 °C (32 °F to 140 °F)
Resolution: ± 0.5 °C (± 1 °F)
Storage: -20 °C to 50 °C (-4 °F to 120 °F)
Approval:
THREE (3) YEARS LIMITED WARRANTY
OUELLET CANADA INC. warrants the component parts of the OTH550
and OTH557 against defects in material and workmanship for a three (3)
year period from the date of purchase, under normal use and service,
when proof of purchase of such is provided to the manufacturer.
The obligation of Ouellet Canada Inc., under the terms of this warranty,
will be to supply a new unit and this releases the manufacturer from pay-
ing the installation costs or other secondary charges linked to replacing
the unit or the component part(s).
If you have any questions on the product, call our technical support team
at:
Ouellet Canada inc
180, 3rd Avenue
L’ISLET, Quebec, Canada G0R 2C0
Quebec area: [phone]
Canada / U.S.: 1-800-463-7043
Fax: [phone]
Sales: [e-mail]
Web: www.ouellet.com
pConfiguration switches 3.
Switch
1Keypad lock a
a. The settings are locked. The temperature adjustment buttons
only allow you to view the temperature setpoint.
Off On
2Cycle length b
b. Select short cycles (15 seconds) in most cases as it provides bet-
ter temperature control. However, you must select long cycles (5
minutes) if you have a fan-forced heater. is displayed when
long cycles are selected.
Short Long
3Temperature
display format °C °F
qConfiguration Menu 4.
Parameter Settings Display and
default setting
Minimum
setpoint
• 5 °C - 30 °C
(41 °F - 86 °F)
Maximum
setpoint
• 5 °C - 30 °C
(41 °F - 86 °F)
rTemperature Display and Setting 5.
sPower Outage 6.
tTroubleshooting 7.
PROBLEM SOLUTIONS
Thermostat’s
housing is hot.
This is normal. When the thermostat is running
at full capacity, its housing can reach 40 °C
(104 °F).
Wrong temperature
is displayed.
Rectify if any of the following conditions applies:
• The thermostat is exposed to air draft.
• The sticker on the thermostat’s screen has
not been removed.
• The thermostat is located near or above a
heat source such as a light dimmer.
Display disappears
and reappears after
a few minutes.
The thermal protection device on the heater has
temporarily opened. This can happen if the
heater is obstructed by furniture or curtain and
has overheated, or if the heater’s thermal pro-
tection device is too sensitive.
uSpecifications 8.
OTH550 OTH557*
Power supply 120/208/240 VAC, 50/60 Hz 277/347 VAC, 50/60 Hz
Minimum
load
1.25 A @ 120/208/240 VAC, 60 Hz
150 W @ 120 VAC, 60 Hz
260 W @ 208 VAC, 60 Hz
300 W @ 240 VAC, 60 Hz
2 A @ 120/208/240 VAC, 50 Hz
250 W @ 120 VAC, 50 Hz
430 W @ 208 VAC, 50 Hz
500 W @ 240 VAC, 50 Hz
2 A @ 120/208/240 VAC, 50/60
Hz
550 W @ 277 VAC, 50/60 Hz
700 W @ 347 VAC, 50/60 Hz
Maxaximum
load
16.7 A @ 120/208/240 VAC, 50/60 Hz
2000 W @ 120 VAC, 50/60 Hz
3465 W @ 208 VAC, 50/60 Hz
4000 W @ 240 VAC, 50/60 Hz
16.7 A @ 120/208/240 VAC,
50/60 Hz
4400 W @ 277 VAC, 50/60 Hz
5500 W @ 347 VAC, 50/60 Hz
;Warranty 9.
Customer Assistance 10.