ELECTRICIAN’S INSTRUCTIONS
FOR MODEL NG110 (120 VAC)
INSTALLATION
This power base is designed to control electric floor-warming systems.
The resistive load must not exceed 1800 watts (NI) @ 120 VAC (15 A).
The thermostat is equipped with a Ground Fault Circuit Interrupter
(GFCI) and therefore the isolation of the line and load are required for
operation.
Do not cap all the white wires together
. During a ground
fault, both line and load will be cut-off. Connect thermostat as shown on
diagram.
Must be installed in accordance with national and local electrical
codes.
TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN
POWER PANEL TO AVOID ELECTRICAL SHOCK.
1
Connecting wires and mounting power base
• Connect the power base
wires to the supply and load
using solderless connectors
for copper wires.
See diagram.
• Push the excess wire back
into the electrical box to
prevent interference with the
power base.
NOTE:
All cables and connections must conform to the local
electrical code.
WARNING: Special CO/ALR solderless connectors must be used
when connecting with aluminum conductors.
2
Connecting temperature sensor wire
• The wire must pass outside
the electrical box and follow
the wall down to the floor.
The sensing probe should be
placed in a representative
heat area for maximum
system performance.
•
The sensing probe should
be centered between the
wires in the mat. The
temperature sensor wire
cannot cross any heater
wires and the sensing probe
must NOT be directly on or
adjacent to a heating wire.
• Secure the power base with the screw.
• Connect the temperature sensor wire to terminals 3 and 4 on the
power base (no polarity needs to be respected).
• Once the power base is properly installed, mount the faceplate.
14/05/03
920-112-000-00-1-A
NG110
SUPPLY
LOAD
WARRANTY
NUHEAT INDUSTRIES ONE (1) YEAR LIMITED WARRANTY
This product is guaranteed against workmanship defects for a one-year
period following the initial date of purchase. During this period,
NUHEAT will repair or replace, at our option and without charge, any
defective product which has been used under normal conditions.
The warranty does not cover delivery costs and does not apply
to products poorly installed or randomly damaged following installation.
This warranty cancels and replaces any other manufacturer's express
or implied warranty as well as any other company commitment.
NUHEAT cannot be held liable for related or random damages
following the installation of this product.
The defective product as well as the purchase invoice must be returned
to the place of purchase or mailed, prepaid and insured, to the
following address:
NUHEAT INDUSTRIES LTD.
USA
CANADA
880 Grant Avenue
1689 Cliveden Avenue
Blaine, WA
Delta, BC
98230
V3M 6V5
1 (800) 778-9276
www.nuheat.com
TECHNICAL SPECIFICATIONS
Model:
NG110
Supply:
120 VAC, 50/60 Hz
Load:
15 A maximum
Power:
1800 watts (NI) @ 120 VAC
Ground Fault Circuit Interrupter (GFCI): Class A (5 mA)
Approvals:
CSA / C,US
Storage:
-4°F to 120°F (-20°C to 50°C)
NUHEAT
is a registered trademark of Nuheat Industries LTD.
TM
Keep the thermostat’s air vents clean and free from
obstructions.
1
Locate the screw at the
bottom of the front module.
2
Secure the thermostat
with the screw.
3
Turn the power back on.
MOUNTING THE FACEPLATE
POWER ON
When the unit is power on for the first time,
the following appears on-screen:
Time (0:00)
Floor temperature
Manual mode icon ( )
If improperly installed, you will see the LO
or HI error message.
LO: Floor temperature is below 0°C
(32°F);
or
temperature probe is
defective (open) or not connected.
*If the heating indicator is also
displayed, then the relay is closed
and current is going through the load.
HI:
NT5 1-800-778-
W
ARM
www
.nuheat.com
Day
Test
Stand By
On
Hour
Min
Pgm
Clear
Mode/Ret
R
Floor temperature is above 60°C (140°F);
or
temperature probe is shorted.
GFCI TEST
NT5 1-800-778-
W
ARM
www
.nuheat.com
Day
Test
Test
Stand By
On
Hour
Min
Pgm
Clear
Mode/Ret
R
1
Adjust the setpoint temperature until the heating indicator ( )
appears on-screen.
2
Press TEST. The test is successful if the GFCI warning light is ON
and power is cut-off. The heating indicator ( ) should still appear.
3
Switch power to Standby, then reset to ON.
If test fails:
A- Verify installation.
B- Check the load wires.
C- Verify that the thermostat is in
heating mode with Heating
indicator ON.
Once you’ve identified the
problem, run the GFCI test again.
