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

Table 1: Installer Configuration Menu

RoomTemp

75.0°F

DI1
set? Y/N

DI2
set? Y/N

Lockout
set? Y/N

Remove the cover and press the
CONFIG key from the Status Display
Menu to enter the Installer
Configuration Menu.

Configures Digital Input 1
Default: No Function (None)
See Configuring the Digital Inputs
(DI1 and DI2).

Configures Digital Input 2
Default: No Function (None)
See Configuring the Digital Inputs
(DI1 and DI2).

Sets Keypad Lockout Level
Default: No Lockout (0)
See Enabling Keypad Lockout
(Lockout).

Cool cph
set? Y/N

Deadband
set? Y/N

Fan cont
set? Y/N

Fan del
set? Y/N

Sets the Maximum Cooling Cycles per
Hour
Default: Four (4.0)
See Setting the Maximum Cooling
Cycles per Hour (Cool cph).

Sets the Minimum Heating/Cooling
Deadband
Default: 2.0°F (1.1°C)
See Setting the Heating/Cooling
Deadband (Deadband).

Determines how the Fan Activates in
Response to a call for Heat
Default: Thermostat Controls Fan (On)
See Setting the Fan Control
(Fan cont).

Delays Fan Termination at Cycle’s End
for 60 Seconds
Default: No Delay (Off)
See Setting the Fan Delay (Fan del).

Pwr del
set? Y/N

Frost pr
set? Y/N

Heat max
set? Y/N

Cool min
set? Y/N

Anticycl
set? Y/N

Heat cph
set? Y/N

Sets Power-up Delay
Default: Ten Seconds (10.0 sec)
See Setting the Power-up Delay
(Pwr del).

Enables/Disables Frost Protection
Default: Disabled (Off)
See Enabling Frost Protection
(Frost pr).

Sets the Maximum Heating Setpoint
Default: 90.0°F (32.0°C)
See Setting the Maximum Heating
Setpoint (Heat max).

Sets the Minimum Cooling Setpoint
Default: 54.0°F (12.0°C)
See Setting the Minimum Cooling
Setpoint (Cool min).

Sets the Anti-Short Cycle Timer
Default: Two Minutes (2.0 min)
See Setting the Anti-Short Cycle Timer
(Anticycl).

Sets the Maximum Heating Cycles per
Hour
Default: Four (4.0)
See Setting the Maximum Heating
Cycles per Hour (Heat cph).

ToccTime
set? Y/N

Cal RS
set? Y/N

Cal OS
set? Y/N

H lock
set? Y/N

C lock
set? Y/N

Sets the Duration for Temporary
Occupancy Time
Default: Three Hours (3.0 hrs)
See Establishing the Temporary
Occupancy Time (ToccTime).

Room Air Sensor Calibration (Offset)
Default: 0.0°F (0.0°C)
See Room Air Sensor Calibration
(Cal RS).

Outdoor Air Sensor Calibration (Offset)
Default: 0.0°F (0.0°C)
See Outdoor Air Sensor Calibration
(Cal OS).

Disables Heating Operation based on
Outdoor Air Temperature
Default: 120°F (49°C)
See Setting the Heating Lockout

(H lock).

Disables Cooling Operation based on
Outdoor Air Temperature
Default: -40°F (-40°C)
See Setting the Cooling Lockout
(C lock).

T600HCN-1 Non-Programmable Thermostat Installation Instructions 5

Configuring the Digital Inputs (DI1 and DI2)

Press the configuration menu access key. The first
prompt is to program Digital Inputs DI1 and DI2.

The digital inputs display an alarm condition when the
input is closed. An alarm message is included on the
scrolling Status Display Menu and when the message
is displayed, the backlight momentarily lights up.

Each digital input can be programmed in one of five
conditions.

• None – No function is associated with the input.

• Service – A Service alarm is displayed.

• Filter – A Filter alarm is displayed.

• RemNSB – Remote night setback timer clock

input. The scheduling is set per the digital input
when this option is selected.

− Open Contact = Occupied setpoints

− Closed Contacts = Unoccupied setpoints

• RemOVR – Remote override contact. This

disables all override menu functions of the
thermostat. The override function is controlled
manually by a remote, momentarily closed
contact. When configured in this mode, the input
operates in a toggle mode. With this function
enabled, it is now possible to toggle between
unoccupied and occupied setpoints for the amount
of time set by the temporary occupancy time
parameter.

When override is enabled through the digital inputs, an
Override message appears in the Status Display
Menu.

To configure the digital inputs while in the Installer
Configuration Menu:

1. The first prompt is to configure the digital inputs.
Press YES to configure Digital Input 1 or NO to
advance to Digital Input 2.

2. Use the UP/DOWN arrow keys to locate the
desired function for the Digital Input 1. Press YES
to select the desired function.

3. Press YES to configure Digital Input 2 or NO to
advance to the keypad lockout setup prompt.

4. Use the UP/DOWN arrow keys to locate the
desired function for the Digital Input 2. Press YES
to select the desired function.

The display now shows the keypad lockout setup
prompt. See the Enabling Keypad Lockout (Lockout)
section for instructions.

Enabling Keypad Lockout (Lockout)

The T600HCN-1 has three levels of keypad lockout.
The levels and degree of lockout are shown in Table 2.

To set the keypad lockout level while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the keypad lockout
setup prompt appears in the display. Press YES to
enter the keypad lockout menu.

2. Use the UP/DOWN arrow keys to locate the
desired lockout level. Press YES to select the
level.

The display now shows the power delay setup prompt.
See the Setting the Power-up Delay (Pwr del) section
for instructions.

Table 2: Keypad Lockout Levels

Level 0 Level 1 Level 2

*Resume to
Scheduling

Temperature

Setpoints

System

Mode Setting

Fan Mode

Setting

*Permanent

Hold

* Displayed only if digital input DI1 or DI2 is configured

for remote NSB.

Setting the Power-up Delay (Pwr del)

On initial power up of the T600HCN-1 (or each time
power is removed and reapplied), there is a delay
before any operation is authorized (fan, cooling, and
heating). The delay time is adjustable between
10 and 120 seconds. You can also use this parameter
to sequence the startup of multiple units in one
location.

Note: When adjusting the time with the UP/DOWN
arrow keys, holding the keys down changes the time
by 10-second intervals.

Yes access Yes access No access

Yes access No access No access

Yes access Yes access No access

Yes access Yes access No access

Yes access Yes access No access

6 T600HCN-1 Non-Programmable Thermostat Installation Instructions

To set the delay time while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the power delay
setup prompt appears in the display. Press YES to
enter the power delay setup menu.

2. Use the UP/DOWN arrow keys to adjust the
power up delay setting. Press YES to store the
setting.

The display now shows the frost protection setup
prompt. See the Enabling Frost Protection (Frost pr)
section for setup instructions.

Enabling Frost Protection (Frost pr)

Frost protection establishes a minimum heating
setpoint of 42°F (5.5°C) to prevent freezing in the zone
controlled by the thermostat. If enabled, frost
protection is activated even if the thermostat is set to
the Off System Mode. If frost protection is active, it is
displayed as an alarm (Frost on with the backlight lit)
on the Status Display Menu.

To enable frost protection while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the frost protection
setup prompt appears in the display. Press YES to
enter the frost protection menu.

2. Use the UP/DOWN arrow keys to select off or on.
Press YES to store the selection.

The display now shows the maximum heating setpoint
prompt. See the Setting the Maximum Heating
Setpoint (Heat max) section for instructions.

Setting the Minimum Cooling Setpoint (Cool min)

The minimum cooling setpoint establishes the
minimum temperature in the cooling setpoint range
that can be adjusted from the Main User Menu. The
parameter is adjustable from 54 to 100°F
(12 to 37.5°C).

Note: When adjusting the temperature, holding the
keys down changes the temperature by 5 F/C°
increments.

To set the minimum cooling setpoint while in the
Installer Configuration Menu:

1. Answer NO to all prompts until the minimum
cooling setpoint prompt appears in the display.
Press YES to enter the minimum cooling setpoint
menu.

2. Use the UP/DOWN arrow keys to adjust the
minimum cooling setpoint temperature. Press YES
to store the value.

The display now shows the anti-short cycle timer
prompt. See the Setting the Anti-Short Cycle Timer
(Anticycl) section for instructions.

Setting the Anti-Short Cycle Timer (Anticycl)

The anti-short cycle timer establishes the minimum
on/off times for the cooling and heating stages. The
timer is adjustable from 0 to 5 minutes in 1-minute
increments. Set the anti-short cycling to 0 for
equipment that possesses its own anti-short cycling
timer.

Setting the Maximum Heating Setpoint (Heat max)

The maximum heating setpoint establishes the
maximum temperature in the heating setpoint range
that can be adjusted from the Main User Menu. The
parameter is adjustable from 40 to 90°F (4.5 to 32°C).

Note: When adjusting the temperature, holding the
keys down changes the temperature by 5 F/C°
increments.

To set the maximum heating setpoint while in the
Installer Configuration Menu:

1. Answer NO to all prompts until the maximum
heating setpoint prompt appears in the display.
Press YES to enter the maximum heating setpoint
menu.

2. Use the UP/DOWN arrow keys to adjust the
maximum heating setpoint temperature. Press
YES to store the value.

The display now shows the minimum cooling setpoint
prompt. See the Setting the Minimum Cooling Setpoint
(Cool min) section for instructions.

T600HCN-1 Non-Programmable Thermostat Installation Instructions 7

!

CAUTION: Risk of Property Damage.

Do not set the T600HCN-1 anti-short cycling timer to
0 minutes if the controlled equipment is not
protected by its own internal anti-short cycling timer.
Setting the T600HCN-1 anti-short cycling timer to
0 minutes can damage controlled equipment that
does not have an anti-short cycling timer.

To set the anti-short cycle time while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the anti-short cycle
timer prompt appears in the display. Press YES to
enter the anti-short cycle timer menu.

2. Use the UP/DOWN arrow keys to adjust the
minimum on/off times for the heating and cooling
stages. Press YES to store the value.

The display now shows the heating cycles per hour
setup prompt. See the Setting the Maximum Heating
Cycles per Hour (Heat cph) section for instructions.

Setting the Maximum Heating Cycles per Hour
(Heat cph)

The heating cycles per hour establishes the maximum
number of times the equipment is turned on and off in
one hour. The selection ranges from three to eight
cycles per hour.

Note: A higher number of heating cycles per hour
results in more accurate temperature control, but could
accelerate the wear of mechanical components in the
equipment.

To set the maximum number of heating cycles per
hour while in the Installer Configuration Menu:

1. Answer NO to all prompts until the heating cycles
per hour prompt appears in the display. Press
YES to enter the heating cycles per hour menu.

2. Use the UP/DOWN arrow keys to adjust the
maximum number of heating cycles per hour.
Press YES to store the value.

The display now shows the cooling cycles per hour
setup prompt. See the Setting the Maximum Cooling
Cycles per Hour (Cool cph) section for instructions.

Setting the Maximum Cooling Cycles per Hour
(Cool cph)

The cooling cycles per hour establishes the maximum
number of times the equipment is turned on and off in
one hour. The selection ranges from three to four
cycles per hour.

Note: A higher number of cooling cycles per hour
results in more accurate temperature control, but could
accelerate the wear of mechanical components in the
equipment.

To set the maximum number of cooling cycles per
hour while in the Installer Configuration Menu:

1. Answer NO to all prompts until the cooling cycles
per hour prompt appears in the display. Press
YES to enter the cooling cycles per hour menu.

2. Use the UP/DOWN arrow keys to adjust the
maximum number of cooling cycles per hour.
Press YES to store the value.

The display now shows the minimum heating/cooling
deadband prompt. See the Setting the Heating/Cooling
Deadband (Deadband) section for instruction s.

Setting the Heating/Cooling Deadband (Deadband)

The heating/cooling deadband setting establishes the
minimum difference between the heating and cooling
setpoints. The range is adjustable from 2 to 4 F°
(1 to 2 C°).

To change the minimum deadband between the
heating and cooling setpoints while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the deadband
setpoint prompt appears in the display. Press YES
to enter the deadband setpoint menu.

2. Use the UP/DOWN arrow keys to adjust the
minimum deadband between the heating and
cooling setpoints. Press YES to store the value.

The display now shows the fan control prompt. See
the Setting the Fan Control (Fan cont) section for
instructions.

Setting the Fan Control (Fan cont)

This parameter controls how the fan activates in
response to a call for heating.

When the fan is in Auto Mode (as selected on the Main
User Menu):

• Selecting on enables the thermostat to control the
fan on a call for heating or cooling.

• When selecting off, the fan energizes by the
thermostat on a call for cooling only. On a call for
heating, the fan is controlled by the equipment fan
limit control.

To set the fan control while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the fan control
prompt appears in the display. Press YES to enter
the fan control menu.

2. Using the UP/DOWN arrow keys, select on or off

.

Press YES to store the selection.

The display now shows the fan delay prompt. See the
Setting the Setting the Fan Delay (Fan del) section for
instructions.

Setting the Fan Delay (Fan del)

The fan delay extends the fan operation by
60 seconds after the call for heating or cooling has
ended. This feature is only active when the fan is in
the Auto mode.

To enable the fan delay while in the Installer
Configuration Menu:

1. Answer NO to all prompts until the fan delay
prompt appears in the display. Press YES to enter
the fan delay menu.

2. Using the UP/DOWN arrow keys, select on or off.
Press YES to store the selection.

The display now shows the occupancy override
prompt. See the Establishing the Temporary
Occupancy Time (ToccTime) section for inst ructions.

8 T600HCN-1 Non-Programmable Thermostat Installation Instructions

Establishing the Temporary Occupancy Time
(ToccTime)

The temporary occupancy time is the length of time
the occupied mode setpoints are used when the
override function is enabled (the override function can
be enabled from the Main User Menu or from one of
the digital inputs) or a temporary setpoint is entered.
The range is adjustable from 0 to 12 hours.

To change the temporary occupancy time while in the
Installer Configuration Menu:

1. Answer NO to all prompts until the temporary
occupancy time prompt appears in the display.
Press YES to enter the temporary occupancy time
menu.

2. Use the UP/DOWN arrow keys to adjust the length
of time the temporary occupancy setpoint should
be in effect. Press YES to store the time.

The display now shows the room sensor calibration
prompt. See the Room Air Sensor Calibration (Cal RS)
section for instructions.

Room Air Sensor Calibration (Cal RS)

An offset can be added or subtracted to the actual
displayed room temperature as needed. The range is
±5.0 F° (±2.5 C°), adjustable in increments of 1 F°
(0.5 C°).

To change the room sensor calibration/offset while in
the Installer Configuration Menu:

1. Answer NO to all prompts until the room sensor
calibration prompt appears in the display. Press
YES to enter the room sensor calibration menu.

2. Use the UP/DOWN arrow keys to adjust the
correction that should be applied to the sensor
reading. Press YES to store the offset.

The display now shows the outdoor air sensor
calibration prompt. See the Outdoor Air Sensor
Calibration (Cal OS) section for instructions.

Outdoor Air Sensor Calibration (Cal OS)

An offset can be added or subtracted to the actual
displayed outdoor air temperature as needed. The
range is ±5.0 F° (±2.5 C°), adjustable in increments of
1 F° (0.5 C°).

To change the outdoor air sensor calibration/offset
while in the Installer Configuration Menu:

1. Answer NO to all prompts until the outdoor sensor
calibration prompt appears in the display. Press
YES to enter the outdoor sensor calibration menu.

2. Use the UP/DOWN arrow keys to adjust the
correction that should be applied to the sensor
reading. Press YES to store the offset.

The display now shows the heating lockout prompt.
See the Setting the Heating Lockout (H lock) section
for instructions.

Setting the Heating Lockout (H lock)

This feature disables heating operation based on
outdoor air temperature (requires outdoor air
temperature sensor to be connected for the function to
be enabled). If the outdoor air temperature is above
the heating lockout temperature, heating operation is
disabled.

The heating lockout temperature parameter is
adjustable from -15 to 120°F (-26 to 49°C) in
increments of 5 F/C°.

To change the outdoor air temperature heating lockout
while in the Installer Configuration Menu:

1. Answer NO to all prompts until the heating lockout
prompt appears in the display. Press YES to enter
the heating lockout menu.

2. Use the UP/DOWN arrow keys to adjust the
lockout temperature. Press YES to store the value.

The display now shows the cooling lockout prompt.
See the Setting the Cooling Lockout (C lock) section
for instructions.

Setting the Cooling Lockout (C lock)

This feature disables cooling operation based on
outdoor air temperature (requires outdoor air
temperature sensor to be connected for the function to
be enabled). If the outdoor air temperature is below
the cooling lockout temperature, cooling operation is
disabled.

The cooling lockout temperature parameter is
adjustable from -40 to 95°F (-40 to 35°C) in
increments of 5 F/C°.

To change the outdoor air temperature cooling lockout
while in the Installer Configuration Menu:

1. Answer NO to all prompts until the cooling lockout
prompt appears in the display. Press YES to enter
the cooling lockout menu.

2. Use the UP/DOWN arrow keys to adjust the
lockout temperature. Press YES to store the value.

3. The exit menu is displayed. Press YES to exit the
Installer Configuration Menu or press NO to return
to the beginning of the menu (digital input
configuration).

T600HCN-1 Non-Programmable Thermostat Installation Instructions 9

Operation

Operating the T600HCN-1

Once the T600HCN-1 is configured through the
Installer Configuration Menu, the thermostat’s
operating parameters can be entered through the Main
User Menu (access the Main User Menu by pressing
the MENU key during normal thermostat operation).
The Main User Menu contains the basic operating
features of the T600HCN-1 (see Table 3).

The Main User Menu uses Auto Help. Auto Help is
displayed automatically in the Main User Menu when
there is a pause in programming activity. To exit Auto
Help, continue with the programming selection.

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

Table 3: T600HCN-1 Parameter Selection

RoomTemp

75.0°F

Override
schd Y/N

*Resumes Regular Programmed

Resume
schd Y/N

Temperat
set? Y/N

Sys mode
set? Y/N

Fan mode
set? Y/N

Press the MENU key while in the
Status Display Menu to enter the Main
User Menu.

*Overrides Unoccupied Setpoints

Only Appears if Thermostat is in
Unoccupied State
See Enabling Occupancy Schedule.

Schedule and Setpoints
Only Appears if Thermostat is in
Override Mode
See Resuming the Programmed
Schedule.

Sets the Temperature Setpoints
See Entering Temperature Setpoints.

Selects the System Mode
Default: Automatic Mode (auto)
See Selecting the System Mode.

Selects the Fan Mode
Default: Automatic (auto)
See Selecting the Fan Mode.

Enabling Override Schedule (only appears when in
Unoccupied Mode) *See note in Table 3

The override schedule prompt only appears when the
thermostat is in the unoccupied state. This menu
selection gives the user the option of overriding the
unoccupied setpoints with the occupied setpoints for
the amount of time specified under the Establishing
the Temporary Occupancy Time (ToccTime)
parameter (see the Configuring the T600HCN-1
section). If one of the digital inputs is configured to
operate as a remote override contact, this menu is
disabled.

To override the unoccupied state while in the Main
User Menu:

1. Answer NO to all prompts until the Override
Schedule prompt appears. If the thermostat is in
the unoccupied state, this is the first prompt.

2. Press YES to enable the temporary override. The
T600HCN-1 returns to the Status Display Menu.

When scrolling through the Status Display Menu,
Override now appears for the schedule status
parameter.

Resuming the Programmed Schedule (only
appears when in the Override Mode) See * in
Table 3.

This menu only appears when the T600HCN-1 is in
the:

• unoccupied override mode

• permanent occupied hold mode

• permanent unoccupied hold mode

Note: (If the T600HCN-1 is not in one of these
modes, this prompt does not appear). Answering yes
to this prompt enables the T600HCN-1 to resume the
regular scheduled program and setpoints.

To resume the schedule while in the Main User Menu:

1. Answer NO to all prompts until the Resume
Schedule prompt appears. If the thermostat is in
the override state, this is the first prompt.

2. Press YES to resume the programmed schedule.

Schedule
hold Y/N

* Displayed only if Digital Input DI1or DI2 is configured

for remote NSB.

*Sets a Permanent Hold on the

Schedule or Resumes the Schedule
See Setting Permanent Hold.

10 T600HCN-1 Non-Programmable Thermostat Installation Instructions

The T600HCN-1 returns to the Status Display Menu.

Entering Temperature Setpoints

When the T600HCN-1 is in the occupied state, the first
prompt appearing in the Main User Menu is to set the
temperature setpoints. This prompt is where the
heating and cooling setpoints for the occupied and
unoccupied (see * in Table 3) states are entered. It is
also where any temporary setpoints are entered.

To enter the heating and cooling setpoints for the
occupied and unoccupied (see * in Table 3) modes
(permanent or temporary), follow the steps in Table 4.
When changing the temperatures, pressing the keys
once changes the temperature 0.5 F/C° and holding
down the keys changes the temperature by 5 F/C°
increments.

Table 4: Entering Temperature Setpoints

RoomTemp

75.0°F

Temperat
set? Y/N

Cooling
set? Y/N

Press MENU from the Status Display
Menu to enter the Main User Menu.

Answer NO to all prompts until the
temperature set prompt appears in
the display (it may be the first
prompt). Press YES to enter
temperature setting menu.

Press YES to change occupied
cooling setpoint. Press NO to
advance to occupied heating setpoint
menu.

Setpoint Type
Permanent Setpoints are permanently stored in the

schedule. This is the default setpoint type.
Temporary Setpoints are changed, but are in effect

only for the time specified in the Establishing the
Temporary Occupancy Time (ToccTime) parameter
(see the Configuring the T600HCN-1 section).

Note: There is no indication that a temporary
setpoint is enabled or active.

After the specified time, the temporary setpoint reverts
to the permanent setpoint.

The temporary setpoint can be cancelled at any time
by using the Permanent Setpoint option in this menu.
When permanent modifications of the setpoints are
required, this parameter needs to be set to permanent.

Unocc CL

80.0°F

Unocc HT
set? Y/N

*Use the UP/DOWN arrow keys to

set temperature. Press YES to store
value and advance to next menu.

*Press YES to change the

unoccupied heating setpoint. Press
NO to advance to temperature
display units.

Unocc HT

62.0°F

*Use the UP/DOWN arrow keys to

set temperature. Press YES to store
value and advance to next menu.

Cooling

75.0°F

Heating
set? Y/N

Heating

68.0°F

Unocc CL
set? Y/N

Use the UP/DOWN arrow keys to set
temperature. Press YES to store
value and advance to next menu.

Press YES to change the occupied
heating setpoint. Press NO to
advance to unoccupied cooling
setpoint menu.

Use the UP/DOWN arrow keys to set
temperature. Press YES to store
value and advance to next menu.

*Press YES to change the

unoccupied cooling setpoint. Press
NO to advance to the unoccupied
heating setpoint.

* Displayed only if Digital Input DI1 or DI2 is configured

°F/°C
set? Y/N

Setpoint
type Y/N

Setpoint
permnent

Exit?
Y/N

for remote NSB.

Press YES to set the display units to
°F or °C. Press NO to advance to
temperature setpoint type menu.

Press YES to select the setpoint type
(permanent or temporary).

Using the UP/DOWN arrow keys,
select the setpoint type (see Setpoint
Type section for a description of
choices). Press YES to enter the
choice.

Press YES to return to the Status
Display Menu or NO to re-enter the
temperature setting menu.

T600HCN-1 Non-Programmable Thermostat Installation Instructions 11

Selecting the System Mode

The T600HCN-1 has four system modes.

• Automatic Mode (auto)

Automatic changeover between heating and
cooling. This is the default setting.

• Cooling Mode (cool)

Cooling operation only.

• Heating Mode (heat)

Heating operation only.

• Off Mode (off)

The T600HCN-1 is off. However, when frost
protection is on (see the Enabling Frost Protection
[Frost pr] section) the thermostat still calls for heat,
if required.

To set the system mode while in the Main User Menu:

1. Answer NO to all prompts until the system mode
prompt appears in the display. Press YES to set
the system mode.

2. Use the UP/DOWN arrow keys to locate the
desired system mode. Press YES to select the
desired system mode.

3. Press YES to return to the Status Display Menu or
NO to return to the system mode selection menu.

Selecting the Fan Mode

The T600HCN-1 has three fan mode settings.

• On Fan Mode (on)

Energizes the fan all the time for both occupied
and unoccupied periods (even if the system mode
is set to off).

• Automatic Fan Mode (auto)

Operates the fan only on a call for heating or
cooling for both occupied and unoccupied periods.
This is the default setting.

• Smart Fan Mode (smart)

Energizes the fan all the time for occupied periods
and only on a call for heat and cooling in
unoccupied periods.

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

To select the fan mode while in the Main User Menu:

1. Answer NO to all prompts until the fan mode
prompt appears in the display. Press YES to set
the fan mode.

2. Use the UP/DOWN arrow keys to locate the
desired fan mode. Press YES to select the desired
fan mode.

3. Press YES to return to the Status Display Menu or
NO to return to the fan mode selection menu.

Setting Permanent Hold
Note: Displayed only if Digital Input DI1 or DI2 is

configured for remote NSB.
This menu is used to set a permanent hold on the

internal scheduling or resume the schedule. The
permanent hold is typically used for nonscheduled
events that extend for long periods of time.

There are three selections for this menu:

• Permanent Occupied Hold (occ hold)
This selection puts the thermostat into a
permanent occupied mode using the occupied
setpoints. Occupied hold appears in the Status
Display Menu when this selection is active.

• Permanent Unoccupied Hold

This selection puts the T600HCN-1 into a
permanent unoccupied mode using the
unoccupied setpoints. Unoccup hold appears in
the Status Display Menu when this selection is
active.

• Resume

This selection cancels the permanent hold and
enables the regular program schedule.

To enable the permanent hold feature while in the
Main User Menu:

1. Answer NO to all prompts until the schedule hold
prompt appears in the display. Press YES to set
the schedule hold type.

2. Use the UP/DOWN arrow keys to locate the
desired permanent hold type (or resume
schedule). Press YES to enter the choice.

3. Press YES to return to the Status Display Menu or
NO to change the schedule hold selection again.

Accessories

Using the information in Table 5, contact the nearest
Johnson Controls branch office or wholesale
distributor to order these accessories.

Table 5: Optional Accessories
(Includes Mounting Hardware)

Item

Remote Indoor Temperature Sensor
Outdoor Air Temperature Sensor
Duct Mount Temperature Sensor
Remote Indoor Temperature Sensor

with Occupancy Override and LED

Product Code

Number

SEN-600-1
SEN-600-2
SEN-600-3

SEN-600-4

12 T600HCN-1 Non-Programmable Thermostat Installation Instructions

Technical Specifications

Product
Power Requirements
Relay Contact Rating

Maximum Inductive

Digital Inputs

Recommended Wire Size

Thermostat Measurement

Range

Sensor Type:

Resolution:

Control Accuracy:

Outdoor Air Temperature

Indication Range

Setpoint Control Range

Minimum Deadband

Ambient Operating

Conditions

Ambient Storage

Conditions

Dimensions (H x W x D)

Shipping Weight

UL and cUL Listing

CE Compliance

FCC Compliance

The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.

T600HCN-1 Non-Programmable Thermostat
20-30 VAC, 50/60 Hz, 24 VAC nominal, Class 2

1 ampere with in-rush surges up to 3 amperes, 30 VAC maximum
Relay dry contact only across the C terminal to DI1 or DI2

18 gauge maximum, 22 gauge recommended

-40 to 122°F (-40 to 50°C)
Local 10 K ohm NTC thermistor

±0.2 F° (±0.1 C°)
±0.9 F° (±0.5 C°) @ 70°F (21°C) typical calibrated

-40 to 122°F (-40 to 50°C)
Cooling: 54 to 100°F (12 to 37.5°C) in 1/2 degree increments

Heating: 40 to 90°F (4.5 to 32°C) in 1/2 degree increments
(Between heating and cooling) 2 F° or 1 C°

32 to 122°F (0 to 50°C); 0 to 95% RH noncondensing

-22 to 122°F (-30 to 50°C); 0% to 95% RH noncondensing

4.94 x 3.38 x 1.13 in. (125 x 86 x 29 mm)

0.75 lb (0.34 kg)
File E27734 with CCN’s XAPX (US, UL 873) and XAPX7 (Canada, CSA C22.2 No. 24)
CE Directives EN50081-1: 1992 EMC Emission; EN50082-2 EMC Immunity (Pending)
This equipment has been tested and found to comply with the limits for a Class A digital

device and verified to Class B pursuant to Part 15 of FCC Rules. These limits are designed
to provide reasonable protection against harmful interference when this equi pment is
operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications.

This device complies with Class A Part 15 of the FCC rules. It was also verified to Class B. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interference that may cause undesired operation.

This Class A digital apparatus meets all of the requirements of the Canadian Interf erence-Causing Equipment
Regulations. Cet appareil numérique de la Classe A respecte toutes les exigences du Règlement sur le materiél
brouilleur du Canada.

Controls Group

507 E. Michigan Street
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201

www.johnsoncontrols.com

T600HCN-1 Non-Programmable Thermostat Installation Instructions 13