INSTALLATION
INSTRUCTIONS
MTC-1991-WU Electronic Thermostat
MTC-1991-WU
This electronic thermostat is mounted in a standard flush
box. The red LED shows that the heat is ON. An ON/
OFF selector switch on the front of the cover makes
system operation extremely simple. This thermostat with
a remote sensor is recommended for the control of floor
heating systems and is designed to meet the standard
requirements for comfort, safety and energy saving when
using electric radiant floor heating.
MOUNTING OF FLOOR SENSOR
The floor sensor should be placed in between two runs of
heating wire. Make sure it is centred so as to achieve the
best accuracy. Make sure the position of this sensor is in
an area of the floor that will not be covered over with any
items that will cause a heat build up which could result in
the overall floor temperature being affected i.e. washing
baskets, rugs etc.
THERMOSTAT INSTALLATION
This should be done by a registered electrician ONLY. The
thermostat is to be mounted on a wall so that it is easily
accessible. The floor sensor should not be influenced by
any other heating sources (i.e. the sun).
• Remove the thermostat knob, noting the position A
• Loosen screw to remove frame and cover B
• Attach wiring from the rear of the thermostat according
to the wiring diagram.
• The thermostat is mounted in a standard single gang
electrical box. Please ensure that the adaptor plate is
properly clipped on the thermostat.
Re-install frame and cover
Re-install the knob in the proper position
OPERATION MANUAL
TEMPERATURE SETTING
The thermostat has a scale range of 10-50⁰C. To assist
this adjustment, the thermostat has a LED which will glow
RED when the heating is ON. The thermostat should be
set to the maximum temperature setting until the desired
temperature of the room or floor is achieved. The control
knob should then be turned back until the LED goes out.
Fine adjustments can be made over the next few days to
suit individual requirements.
MAX/MIN TEMPERATURE SETTING
Behind the knob there are red and blue locking rings
held in position by a screw. To set the limitations, loosen
the screw (C) and adjust the red limit ring to the desired
maximum, set the blue ring to the desired minimum
temperature, then retighten the screw, The knob must be
re-installed exactly as it was removed.
1.
On/Off
I – On O – Off
2.
Temperature setting
10 – 50⁰C
3.
Indicator
The light is red when
the heat is On.
1 2
3
