Nuheat HMYDV User Manual


Description
The HMYDV thermostat is designed to control the temperature of a
floor heating system. The thermostat can be used with a maximum
load of 15 A (1800 W @ 120 VAC or 3600 W @ 240 VAC).
Temperature limit
selection switch
Display
Temperature sensor
terminals
SUPPLIED PARTS
• One (1) thermostat
• One (1) floor temperature sensor
• Four (4) 6-32 mounting screws
• Four (4) solderless connectors

Installation
TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN
POWER PANEL TO AVOID
thermostat does NOT protect against electrical shocks resulting
from contact with both conductor wires.
The thermostat's housing is not watertight. Do NOT install the
thermostat in an area where it can be exposed to water or rain.
Connect the thermostat
wires to the power and
to the load using
solderless connectors
for copper wires.
Power
Connect the grounding
supply
braid of the floor
heating system to the
supply ground.
NOTE: All cables and connections must
conform to the local electrical code.
This thermostat has tinned copper wires
for line and load connections. Special
CO/ALR solderless connectors must be
used if these wires are to be connected
to aluminium conductors.
HMYDV
Adjustment buttons
Mode button
Floor Temp
Day selection
button
Floor
Sensor
Return button
Program button
GFCI test and
reset buttons
ELECTRICAL SHOCK.
Load
1.
Mount the thermostat onto the electrical box using the provided
screws.
Connect the temperature sensor
to the terminals as shown.
NOTE: The temperature sensor
wires must not come in contact
with the electrical wires and
must be routed outside the elec-
trical box.
WARNING: THE FLOOR TEMPERATURE LIMIT MUST BE SET TO
'LIMITED' FOR ALL LAMINATE AND ENGINEERED WOOD FLOOR
APPLICATIONS (SEE SECTION 5.2).
If there is a sticker on the display, peel it off.
Apply power to heating system.

Programming
NOTE: Interactive programming tutorial available at www.nuheat.com
3.1 Clock and Day Setting
The clock must be set when the time display flashes on the screen.

Press and hold the Day button for 1 second.
2.
The day display will flash.

Set the day using the
This

Press the Mode button. The hour display will flash.

Set the hours using the

Press the Mode button again. The minute display
will flash.

Set the minutes using the

Press the
3.2 Customizing the Schedule
You can customize your thermostat's schedule using either:
• 5+2 day programming - easier to set as you enter only two pro-
grams: one program for weekdays (Monday to Friday) and
another program for weekends (Saturday and Sunday).
• 7-day programming - more flexible as you can set a different
program for each day of the week.
See section 5.1 to learn how to switch between the two different pro-
gramming methods.
You can program up to 4 periods in a day. To program a period, you
must enter the starting time and the temperature setpoint for the
period.
5+2 day programming
5-day programming allows you to enter one program for weekdays
(Monday to Friday) and another program for weekends (Saturday
and Sunday). Use the following grid to record your new settings.
Electronic Thermostat
sensor
wires
buttons.
buttons.
buttons.
button to end.
HMYDV

User Guide

Floor Temp
Floor
Sensor
3.
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