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Installation Guide

page 4

18-HD72D1-1

4. Installation

4.1 Location

The 824 Control is designed for installation in climate
controlled living spaces. Place the unit in a central location
with good circulation.
For proper temperature sensing, avoid mounting the Control
where it will be exposed to heat radiated from lamps, sun
light, fireplaces or any other radiant heat source.
Avoid locations close to windows, behind doors or alcoves
with poor air circulation, adjoining outside walls, or doors
that lead to the outside.
Select a location that prevents the Control from being
directly exposed to air currents from supply registers or
ceiling fans.
Mount the Control on a section of interior wall that does not
contain hor or cold water pipes or duct work.
Important: The 824 Control utilizes a 4.5” color touch screen.
This screen generates heat which is vented out the top of
the Control utilizing natural convection. If an air source is
directed at or from above, heat from the screen can be
trapped within the Control body and can cause the indoor
temperature to be biased. Refer to “Figure 1. Placement of
the 824” on page 4

4.2 Network Connections

To take advantage of the full range of features on the 824
Control, it should be connected to the Internet. This is
possible using either a wireless or a wired connection.

Wireless Connections

If the 824 Control will be connected to the Internet using the
built-in wireless feature, choose a mounting location that
ensures adequate signal strength from the internet router.
Tips to Help Maximize Signal Strength:

— Do not mount the Control more than 30 feet from the

wireless router

— There should be no more than three interior walls

between the Control and the router.

— Do not mount the Control in areas where

electromagnetic emissions from other devices,
appliances or wiring can interfere with the Control’s
communication. (i.e. wireless phones, security
systems, wireless internet cameras).

— Do not mount the Control in recessed areas,

near metal objects, or near structures. (i.e. doors,
appliances, entertainment centers or shelving units).

— Do not mount the Control closer than 2 inches to any

pipes, duct work, or other metal obstructions.

— Do not have metal obstructions, concrete or brick

walls between the Control and the router it.

Wired Connections

The 824 Control may be connected to the Internet using its
built-in RJ-45 connector. When using a wired connection,
verify that a CAT 5 or better Ethernet cable with a male
RJ-45 connector is present from the router to the Control.

4.3 Mounting

Follow these steps to mount the 824 Control to the wall.

1. Turn OFF all power to heating and cooling equipment.
2. If an existing thermostat is being replaced:

a.  Remove the existing thermostat from the wall.
b.  Record color and terminal marking of each wire.
c.  Disconnect the wires from the existing thermostat

being careful not to allow them to fall back into
the wall.

3. Carefully pry the sub-base away from the 824 Control

using a small flat-blade screwdriver. Note that the
tight fit is normal and ensures that the Control is held
securely to the sub-base when mounted on the wall.

4. Route the thermostat wires through the opening on

the sub-base.

5. If using a wired Internet connection, route the Ethernet

cable through the opening.

6. Place the sub-base against the wall in the desired

location and mark the wall through the mounting
holes. If you are using a wired Internet connection,
be sure to mark the cutout for the RJ-45 Holder (see
“Figure 2. Mark the Mounting Holes”).

Incorrect
Placement
of the 824

Ceiling Fan

Natural heat

dissapation

from the 824

Touch Screen

Onboard

Thermistor

5 FEET

Optimum
Zone

2 FEET

Correct
Placement
of the 950