Johnson Controls T600HCN-1 Installation Instructions Manual

Installation Instructions
Issue Date December 9, 2003

T600HCN-1 Non-Programmable Thermostat

Applications

The T600HCN-1 is a single-stage non-programmable
thermostat that provides exceptional accuracy through
the use of a unique Proportional-Integral (PI) time
proportioning algorithm. The thermostat’s proprietary
adaptive logic algorithm provides a constant space
temperature by controlling the Heating, Ventilating,
and Air Conditioning (HVAC) equipment to minimize
overshoot and maximize comfort. The algorithm
virtually eliminates temperature offset associated with
traditional, differential-based on/off thermostats.
Additionally, the menu-driven backlit display, plain text
menus, and five keys on the T600HCN-1 make
operating the thermostat easy and intuitive.

To install the thermostat:

1. Remove the security screw on the bottom of the
thermostat cover using a Phillips-head
screwdriver. Open the thermostat by pulling on the
bottom side of the thermostat cover (see Figure 1).

2. Unlock the Printed Circuit Board (PCB) by
carefully pressing the locking tabs to the right
(see Figure 2). Open the thermostat’s PCB to the
left.

3. Pull out approximately 6 in. (152 mm) of wires
from the wall and insert the cable through the hole
in the base.

Installation

Location Considerations

Locate the T600HCN-1 thermostat as follows:

• on a partitioning interior wall, and approximately
5 ft (1.5 m) above the floor in a location of average
temperature

• away from direct sunlight, radiant heat, outside
walls, behind doors, air discharge grills, stairwells,
or outside doors

• away from steam or water pipes, warm air stacks,
unheated/uncooled areas, or sources of electrical
interference

4. Align the base on the wall, and using the base as
a template, mark the location of the two mounting
holes on the wall. Confirm the thermostat base is
installed with the proper side up.

5. Use the supplied anchors and screws for mounting
on drywall or plaster. Drill two 3/16 in. (4.7 mm)
holes at the marked locations and tap nylon
anchors flush to wall surface (see Figure 3).

6. Position base on the wall, insert screws through
mounting base, and fasten into wall anchors. Do
not overtighten screws.

7. Swing the thermostat PCB back to the right to
close. Gently press on the PCB to secure each of
the locking tabs.

8. Pull out the screw terminal blocks using the pull
tabs on each connector (see Figure 4).

Note: The number of terminals on the terminal
blocks varies depending on the T600 model.

IMPORTANT: Use this T600HCN-1
non-programmable thermostat only as an operating
control. Where failure or malfunction of the
T600HCN-1 could lead to personal injury or property
damage to the controlled equipment or other
property, additional precautions must be designed
into the system. Incorporate and maintain other
devices such as supervisory or alarm systems or
safety or limit controls intended to warn of, or protect
against, failure or malfunction of the T600HCN-1.

© 2003 Johnson Controls, Inc.
Part No. 24-9889-10, Rev. A www.johnsoncontrols.com

1

Figure 1: Removing the Thermostat Cover

Figure 4: Removing the Terminal Blocks

Wiring

PCB

Lockin g Tabs

Figure 2: Opening the Thermostat PCB

!

CAUTION: Risk of Electrical Shock.
Disconnect power supply before making electrical
connections to avoid electrical shock.

Note: When replacing an existing thermostat,
remove and label wires to identify terminal
designations. When replacing a T600HCN-1
thermostat, simply remove the terminal blocks and
reinsert onto the new thermostat.

To wire the thermostat:

1. Strip each wire 1/4 in. (6.35 mm) and connect to
the appropriate terminal according to the wiring
diagram (see Figure 5).

2. Gently push excess wire back into wall, plug the
wall hole with fireproof material to prevent drafts
from affecting ambient temperature readings, and
install screw terminal blocks back onto the PCB.

3. Reattach the thermostat cover to the installed
base (top side first) and install the security screw
on the bottom.

Figure 3: Mounting the Thermostat Base

2 T600HCN-1 Non-Programmable Thermostat Installation Instructions

!

CAUTION: Risk of Property Damage.

Do not apply power to the system before checking
all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to
the equipment.

Terminal

W1

Y1

G

RC

C

RH

D1
D2

RS

Scom

OS

Cool 1

Thermostat Power

Function

Energize s on call for heating
Energize s on call for cooling
Energize s fa n in accordance with the selected fan m ode
24 VAC from equipment transformer
24 VAC (comm on from equip m ent transformer
24 VAC for heati ng stage
Configurable digital input
Configurable digital input
Remote ro om sensor
Sensor com mon
Outdoor air sensor

Y1

GRCC

Fan

24 VAC

)

RH W1 D1

Heat 1

If using the same power source
for the thermostat and heating
loads, ins t all a jumper
across RC and RH.

Figure 5: T600HCN-1 Wiring Schematic

4-pole l ef t to p connector

Y1 G RC

5-pole bo t to m connector

D1 D2 RS

2-pole ri ght top connector

C

RH W1

Scom

OS

RS

Scom

D2

Remote

Room

Sensor

OS

Setup and Adjustments

Thermostat Operation Overview

Backlit, plain text, Liquid
Crystal Display (LCD)
is easy to read in any
condition.

Five keys on the T600
make operation easy
and intuitive.

Figure 6: T600HCN-1 Front Cover

Room Temp

75.0ºF

Light Emi t ting Diodes (L E Ds)
indicate system activit y.

T600HCN-1 Non-Programmable Thermostat Installation Instructions 3

Thermostat Interface Keys

The T600HCN-1 interface consists of five keys on
the front cover and one configuration key
(see Figure 7) that is accessed by removing the
front cover. The functions of the keys are as
follows. Use the:

• YES key to confirm a selection and move onto the
next menu item

• NO key when you do not desire a parameter
change, and to advance to the next menu item

• MENU key to access the Main User Menu or exit
the menu

• down arrow key to scroll through menu selections
or adjust values

• up arrow/SCROLL key to:

− scroll through menu selections or adjust

values

− stop the Status Display Menu from scrolling

and to manually scroll to the next parameter
on the menu. When left unattended for
45 seconds, the display resumes scrolling

Programming Overview

There are three menus used to view, program, and
configure the T600HCN-1 thermostat.

The Status Display Menu is the menu that displays
during normal thermostat operation. The menu
continually scrolls through the following parameters
(see Figure 6).

• Room Temperature

• System Mode

• Schedule Status (Occupied/Unoccupied

[see Note])

• Outdoor Temperature (providing sensor is
connected and functional)

• Applicable Alarms (the backlight lights up as an
alarm condition is displayed)

To temporarily stop the scrolling, press the up
arrow/SCROLL key.

Note: Displayed only if Digital Input (DI1 or DI2) is
configured for remote Night Setback (NSB).

The Main User Menu is used to access and change
the thermostat’s basic operating parameters. Access
the menu by pressing the MENU key during normal
thermostat operation.

Configuration

Key

Figure 7: Configuration Key Location

Backlit Liquid Crystal Display (LCD)

The T600HCN-1 uses a two-line, eight-character
backlit display. Low level backlighting is present during
normal operation and it brightens when any user
interface key is pressed. The backlight returns to the
lower level when the thermostat is left unattended for
45 seconds.

Light-Emitting Diodes (LED)s

Three LEDs are used to indicate the status of the fan,
call for heat, or call for cooling. When:

• the fan is on, the FAN LED lights up

• heating is on, the HEAT LED lights up

• cooling is on, the COOL LED lights up

The Installer Configuration Menu is used to set up
the thermostat for application specific operation.
Access the menu by removing the front cover and
pressing the configuration key, labeled CONFIG
(see Figure 7).

Configuring the T600HCN-1

The T600HCN-1 ships from the factory with default
settings for all configurable parameters. The default
settings are shown in Table 1. To reconfigure the
parameters, follow the steps in this section for the
corresponding parameters. The parameters must be
set up by accessing the Installer Configuration Menu.
Access the Installer Configuration Menu by removing
the front cover and pressing the configuration key
(see Figure 7).

Exit the Installer Configuration Menu anytime by
pressing the MENU key and, at the exit prompt,
pressing the YES key. To pass over a parameter
without changing it, press the NO key.

When the thermostat is in the Installer Configuration
Menu and left unattended for 45 seconds, it reverts to
the Status Display Menu.

4 T600HCN-1 Non-Programmable Thermostat Installation Instructions