Ouellet OTH770 - Manual (Page 2)

OTH770 400-609-011-A 2009-07-29 2/3
q
Insert the temperature sensor wires through one of the openings
on the thermostat base and connect the wires to terminals 1 and
2 (no polarity).
• The sensor cable must not come in contact with the electrical
wires and must be routed outside the electrical box and follow
the wall down to the floor.
• Position the sensor cable such that it does not come in con-
tact with the floor heating wires. The sensor must be centered
between two floor heating wires for best temperature control.
• Do NOT staple the sensor head (the plastic end) to the floor.
Doing so might damage the sensor. Any damage might not be
noticeable during testing but can become apparent several
days later.
r If you wish to connect a remote control device, insert the wires
(use 18- to 22-gauge flexible wires) through one of the two open-
ings on the base and connect them to terminals 2 and 3 (no
polarity).
s
Push the excess length of the line voltage wires back inside the
electrical box. Install the thermostat base onto the electrical box
using the provided screws.
t Set the DIP switches (refer to section 3).
u Reinstall the thermostat faceplate on its base and secure it with
the screw. If there is a sticker on the screen, peel it off.
v
Apply power to the heating system. Verify the installation by
making sure that the heating system can be turned on or off by
increasing or decreasing the setpoint respectively.
w
Test the ground fault protection (refer to section 7).
NOTE: Keep the air vents (openings) at the top and bottom of the
thermostat clean and unobstructed at all times.
The configuration switches are located on the back of the faceplate.
3.1 Temperature Display (S1)
Select between °C and °F.
3.2 Application Mode Selection (S2)
The Vacation mode can be activated using a remote control device
equipped with a normally-open (NO) dry contact such as Aube’s
telephone controller (CT240/CT241).
In the Vacation mode, the temperature is reduced by 3.5°C (7°F) and
the thermostat buttons are locked to prevent any temperature
adjustment. The mode is indicated by the suitcase icon
on the
screen. When the contact opens, the thermostat returns to normal
mode and to the initial temperature setpoint.
When the thermostat is powered, it first undergoes a
series of tests before displaying the actual temperature.
The measured temperature is below the thermostat’s dis-
play range. Heating is activated.
The measured temperature is above the thermostat’s dis-
play range. Heating is deactivated.
Verify the thermostat and sensor connections.
The thermostat has built-in ground fault protection. In the event of a
ground fault, the ground fault protection mechanism on the thermo-
stat trips and quickly stops the flow of electricity to prevent serious
injury.
7.1 Definition of a ground fault
Instead of following its normal safe path, electricity passes through a
person’s body to reach the ground. For example, a defective floor
heating mat can cause a ground fault.
A ground fault protection thermostat does not protect against circuit
overloads, short circuits, or electrical shocks. For example, you can
still receive an electrical shock if you touch bare wires while standing
on a non-conducting surface such as a wood floor.
7.2 Resetting the Ground Fault Protection
The TEST button-light is On (red) when the
ground fault protection mechanism trips. If
the TEST button-light comes On during nor-
mal operation, reset the ground fault pro-
tection and check if the fault has been
caused by an external interference such as
a halogen button-light or an electric motor.
To reset the ground fault protection, switch
the thermostat to Off and back to On. The
TEST button-light will go off. However, if the
p
Configuration 3.
Floor sensor
To remote control device (see section 4)
F: Select the F mode if you wish to control the floor temperature.
AF: Select the AF mode if you wish to control the ambient temperature.
q
Vacation Mode 4.
r
Power-up 5.
s
Error Messages 6.
t
Ground Fault Protection 7.
TEST button-light
400-609-011-A (OTH770-GA&GB) ENG.fm Page 2 Wednesday, July 29, 2009 2:42 PM