Carrier PTACSTAT-NP-HP Installation instructions

P T A C S T A T --- N P --- H C ,
P T A C S T A T --- N P --- H P
Installation Instructions
Operating Manual
A07050
Non---Programmable Thermostat
NOTE: Read the entire instruction manual before starting the installation.

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TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 3....................................
INTRODUCTION 4..............................................
INSTALLATION CONSIDERATIONS 4..............................
INSTALLATION 5...............................................
Step 1 — Thermostat Location 5...................................
Step 2 — Install Thermostat 6......................................
Step 3 — Set Thermostat Configuration 11...........................
Step 4 — Check Thermostat Operation 16............................
OPERATING THE THERMOSTAT 18...............................
TROUBLE SHOOTING 23........................................
WARRANTY 25.................................................
WIRING DIAGRAMS 30..........................................
SAFETY CONSIDERATIONS
Read and follow manufacturer instructions carefully. Follow all local electrical
codes during installation. All wiring must conform to local and national electrical
codes. Improper wiring or installation may damage thermostat.
Recognize safety information. This is the safety--alert symbol . When you see
this symbol on the equipment and in the instruction manual, be alert to the
potential for personal injury.
Understand the signal words DANGER,WARNING,andCAUTION.These
words are used with the safety--alert symbol. DANGER identifies the most
serious hazards which will result in severe personal injury or death. WARNING

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signifies a hazard which could result in personal injury or death. CAUTION is
used to identify unsafe practices which may result in minor personal injury or
product and property damage. NOTE is used to highlight suggestions which will
result in enhanced installation, reliability, or operation.
INTRODUCTION
Carrier’s PTAC ComforttSeries non--programmable thermostat is a
wall--mounted, low--voltage thermostat which maintains room temperature by
controlling the operation of a heating and/or air conditioning system. Both heat
pump and air conditioner models are available. A variety of features are provided
including battery operation, memory in case of power interruption, separate
heating and cooling setpoints, backlighting, and built--in installer test.
This Installation Instruction guide and owners manual covers installation,
configuration, start up and operation of the PTAC specific Comfort Series line of
thermostats.
INSTALLATION CONSIDERATIONS
Models
There are two models for the PTAC Comfort Series non--programmable thermostat,
AC and HP versions. The model PTACSTAT--NP--HC--x is designed for AC
systems, controlling one stage of cooling and one stage of heating. It will not operate
a heat pump. Model PTACSTAT--NP--HP--x is designed for HP systems, controlling
one stage of cooling and two stages of heating. The HP thermostat model can be
converted to an AC unit. Select the appropriate model for the intended application.
Power
All Comfort Series models are dual powered. They can operate from batteries
(optional) or 24VAC power. Operation from 24VAC is preferred, if available.

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Batteries
Battery operation is available for installations where there is no common (C)
wire available at the thermostat. For battery operation, install two alkaline AA
batteries. The thermostat is designed to operate up to one year on a set of
batteries. A battery indicator on the display warns when battery replacement is
needed. If batteries are installed and the thermostat is operated from 24VAC
power, battery operation will occur only when 24VAC power is not present. The
changeover between 24VAC power and battery power is automatic.
For HeatCool system, 5 wires are needed for 24VAC operation and 4 wires are
required for battery operation.
For HP system, 6 wires are needed for 24VAC operation and 5 wires for battery
operation.
When battery operation is used, the C terminal does not need to be connected.
NOTE: Batteries are not required when there are enough wires for proper
operation.
INSTALLATION
Mounting to a horizontal junction box.
For those installations requiring it, mounting hole locations for the
non--programmable are spaced to fit a horizontal junction box.
Step 1 — Thermostat Location
SApproximately 5 ft (1.5m) from floor.
SClose to or in a frequently used room, preferably on an inside
partitioning wall.
SOn a section of wall without pipes or duct work.

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Thermostat should NOT be mounted
SClose to a window, on an outside wall, or next to a door leading to the
outside.
SExposed to direct light or heat from the sun, a lamp, fireplace, or other
temperature--radiating objects which could cause a false reading.
SClose to or in direct airflow from the unit.
SIn areas with poor air circulation, such as behind a door or in an
alcove.
Step 2 — Install Thermostat
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing thermostat, turn off all power to equipment.
There may be more than 1 power disconnect. Lock out and
tag switch with a suitable warning label.
!WARNING
1. Turn OFF all power to unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from wall.
b. Disconnect wires from existing thermostat, 1 at a time. Be careful not
to allow wires to fall back into the wall.
c. As each wire is disconnected, record wire color and terminal marking.
d. Discard or recycle old thermostat.

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ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental
damage.
Mercury is a hazardous waste. Federal regulations require that
Mercury be disposed of properly.
CAUTION
!
3. Open thermostat (mounting base) to expose mounting holes. The base
can be removed to simplify mounting. Press the thumb release at the top
of the thermostat and snap apart carefully to separate mounting base from
remainder of thermostat.
4. Route thermostat wires through large hole in mounting base. Level mounting
base against wall (for aesthetic value only—thermostat need not be level for
proper operation) and mark wall through 2 mounting holes. See Fig. 1.
A08093
Fig. 1 -- Backplate Mounting

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5. Drill two 3/16--in. mounting holes in wall where marked.
6. Secure mounting base to wall with 2 anchors and screws provided
(additional anchoring holes available for more secure mounting, if
needed) making sure all wires extend through hole in mounting base.
7. Adjust length and routing of each wire to reach proper terminal and
connector block on mounting base with 1/4 in. of extra wire. Strip only
1/4 in. of insulation from each wire to prevent adjacent wires from
shorting together when connected. See Fig. 2.
A08094
Fig. 2 -- Secure Wires to Terminal Strip
8. Match and connect wires from the PTAC unit to proper terminals on the ther-
mostat connector blocks (see Fig. 3). Do not remove factory--installed jumper
wire from Rc and Rh terminals. The R wire from the PTAC can be connec-
ted to either position.

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R W Y O Gh Gl C
C
Gl
Gh
O
Y
W
R
Rc - 24 VAC, from cooling equipment
Rh - 24 VAC, from heating equipment
W - Heating
C - Common 24 VAC
G - Fan
Y - Cooling
O/B
reversing
valve
Not used
OR
OR
or
PTAC Terminal
Designations
Thermostat Terminal Designations
A08092
Fig. 3 -- Terminal Designations

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ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Improper wiring or installation may damage the thermostat.
Check to make sure wiring is correct before proceeding with
installation or turning on unit.
CAUTION
!
9. Push any excess wire into wall and against mounting base. Seal hole in
wall to prevent air leaks. Leaks can affect operation.
10. Snap case back together. Attach thermostat to backplate by inserting tab
on bottom edge and hinging up until top snap secures. See Fig. 4.
A08095
Fig. 4 -- Attach Comfort Series Programmable Thermostat

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11. Close thermostat assembly making sure pins on back of circuit board
align with sockets in connector.
12. Turn ON power to unit.
When power is applied, all display icons are lit for 2 seconds to test the display.
Following this, the equipment type for which the thermostat is configured is
displayed for an additional 2 seconds. It will be one of PH or PC (if HP, AC, H or C
is displayed, the thermostat is configured incorrectly to operate a PTAC). See
explanation under Step 3, Option 01 below. A heat pump thermostat, configured to
operate a HeatCool unit (see Option 1 below), will display PC. A HeatCool
thermostat cannot be configured to operate a HeatPump unit.
NOTE: If a common wire has not been connected, two AA batteries must be
used to power the thermostat.
Step 3 — Set Thermostat Configuration
Configuration options enable the installer to configure the thermostat for a particular
installation. These must be set correctly to insure proper PTAC operation. Following
is a list of the options available, an explanation of their function, and their factory
default settings.
Configuration Options -- Summary:
Option 01 -- Equipment type
Option 03 -- Fahrenheit/Centigrade
Option 04 -- Unused for PTAC
Option 07 -- Unused for PTAC
Option 10 -- Reversing valve (HP only)
Option 11 -- Minimum deadband between heating and cooling setpoints
Option 13 -- Room air temperature offset adjustment
Option 16 -- Maximum cycles per hour

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Option 17 -- Time between equipment stages (HP only)
Option 18 -- Continuous backlighting (when 24VAC is supplied only)
Option 26 -- Minimum cooling setpoint
Option 27 -- Maximum heating setpoint
Option 39 -- Display setpoint only (or setpoint and room air)
Option 99 -- Reset to factory defaults
To Enter the Advanced Configuration Mode:
Press and hold the FAN key for about 10 seconds until the display changes so
that only two pairs of digits are showing. The large upper display shows the
configuration number and the small lower shows the configuration setting.
Configuration number will be flashing, which means it can be adjusted using the
UP and DOWN keys. To cause the opposite pair to flash (to be adjustable), press
the MODE key. Successive presses of the MODE key alternate between the
configuration number and the configuration setting. To exit the configuration
mode, press the FAN key. If no key is pressed for 3 minutes, the configuration
mode will automatically exit, returning the thermostat to normal operation (all
previous changes will be saved).
Configuration Options -- Selection:
Option 01 -- Equipment type
A PTAC HeatPump thermostat (PTACSTAT--NP--HP--x), valid selections are PH
or PC -- Default is PH.
A PTAC HeatCool thermostat (PTACSTAT--NP--AC--x), the only valid selection
is PC -- Default is PC.
Other selections are available, HP (HeatPump stat only), AC, H or C, but should
not be used as they will not operate your PTAC correctly.

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Meanings:
PC or PH selects PTAC units (Packaged Terminal Air Conditioners).
PH controls a PTAC with 1 speed heat pump with 1 stage of aux heat.
PC controls a PTAC with 1 speed air conditioner with 1 stage of E1 heat.
NOTE: A PH thermostat can be converted to control a HeatCool system.
Option 03 -- Fahrenheit/Centigrade
Selects temperature measurement units.
Selections:
F = Fahrenheit
C = Centigrade
Default is Fahrenheit
Option 04 -- Not used on a PTAC system
Default = OF
Option 07 -- Not used on a PTAC system
Default = OF
Option 10 -- Reversing valve (HP only)
This selection is only available on heat pump systems. “O/B” terminal can be
configured to be energized in either heating mode or in cooling mode, depending
on heat pump operation.
C — Thermostat output (O/B) will have 24VAC in cooling mode, 0VAC in
heating mode.
H — Thermostat output (O/B) will have 0VAC in cooling mode, 24VAC in
heating mode.
Default is C for PTAC.

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Option 11 -- Minimum Deadband Between Heating And Cooling
Selections:
01 through 06 — Default is 02.
Sets the minimum allowable number of degrees between heating and cooling
setpoints. One setpoint will “push” the other to maintain this difference.
Option 13 -- Room Air Temperature Offset
Selections:
--5to5_F—Defaultis0.
This option selects the number of degrees F to be added to the displayed
temperature to calibrate or deliberately miscalibrate the measured room
temperature.
Option 16 -- Maximum Cycles Per Hour
Selections:
2, 4, or 6 — Default is 4.
The maximum cycle rate is limited by internal timers to the selected number of
cycles per hour. Selection of a higher number causes faster cycling, resulting in
more constant room temperature.
Based on the selection of 2, 4, or 6 cycles per hour, a timer is set to 30, 15, or 10
minutes. This much time must elapse from the start of one cycle before another
cycle can start. For testing, it can be defeated for one cycle by simultaneously
pressing the FAN and UP keys.
If the cycle timer is preventing the equipment from turning on, the display icons
that show the equipment is operating will be flashing to indicate a turn--on delay
is present.

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Option 17 -- Minimum Time Between Equipment Stages (HP only)
Selections:
10, 15, 20, 25 minutes — Default is 15.
When there are two stages of heat available, this is the amount of time the first
stage must operate before the second stage can turn on. With heat pumps, longer
times can reduce the amount of auxiliary heat used. Not available with AC
thermostats.
Option 18 -- Backlight Configuration
Selections:
ON, OF — Default is OF.
When ON is selected and the thermostat is not battery operated, a low level
continuous display backlight is always on. With OF selected, the backlight is
only on for a short time after a key is pressed.
NOTE: Continuous backlight is not available with battery operation.
Option 26 -- Minimum Cooling Setpoint
Selections:
52_to 90_F—Defaultis62_F.
Sets the lowest cooling setpoint available to the user.
Option 27 -- Maximum Heating Setpoint
Selections:
50_Fto88_F—Defaultis83_F.
Sets the highest heating setpoint available to the user.

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Option 39 -- Display Setpoint Only or Setpoint and Room Temperature
This configuration option determines what the display on the thermostat will
look like.
Selections:
SP — Will display the setpoint only.
rt — Will display the setpoint and room air temperature
Default = SP
Option 99 -- Reset to Factory Defaults
Selection:
See below — There is no default.
Use this capability to reset the thermostat to “out of the box” conditions.
NOTE: All previous configuration settings will be lost!
When this option is selected, the configuration number (99), will appear on the
large upper display and 10 will appear on the lower. To perform the reset, first
use the MODE key to make the 10 flash. Then press and hold the DOWN key.
The 10 will start counting down toward zero. If the DOWN key is kept pressed
until the count reaches zero, the reset will be performed. If the DOWN key is
released early, the number will return to 10 and the reset will not occur.
Step 4 — Check Thermostat Operation
The PTAC Comfort Series non--programmable thermostat has a built--in installer
test capability. Use it to check thermostat and equipment operation without
delays or setpoint adjustments to force heating or cooling.
NOTE: Any time delays or protections built into the equipment will still be
active.

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To enter the Installer Test mode, use the same process as is used to enter Installer
Configuration, only hold the FAN key longer. More specifically, press and hold
the FAN for about 15 seconds until the display reads In on the left and S in the
smaller display. The MODE will be OFF. The MODE key (upper left) can now
be used to select heat, cool, or emergency heat (HP only). Selecting one of the
available modes will immediately command the equipment to turn on in that
mode. The request will stay active for 3 minutes and then return the mode to off.
With HeatPump thermostats (having 2 stages of heating), the request will be
active for 3 minutes on each stage.
Changing the mode to OFF will terminate any running test immediately.
During any test, the display icons will be displayed the same as for normal
operation of that stage, as follows:
SELECTED MODE DISPLAY ICONS
off off
cool cool on
heat heat on, aux heat on
Em Heat (HP only) aux heat on
To terminate the Installer Test mode, press the up or down temperature buttons.
If the thermostat is left in Installer Test mode, it will revert back to normal
operation after 15 minutes.
Checklist
1. Run equipment through several heating and cooling cycles to ensure
proper operation.
2. If the equipment is to be left in operation, setpoints and operating mode
must be properly selected.
3. Put away tools and instruments and clean up debris.

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OPERATING THE THERMOSTAT
NOTE: Should the thermostat lose power, it will turn back on with the last
settings prior to the power outage.
Button Identification
A08088
Fig. 5 -- Button Identification
a -- FAN Selects whether the fan operates continuously (on) or in cycle mode
(auto)
b -- MODE Selects whether thermostat is set for heating, cooling, emergency
heat (heat pump system only) or off
c -- UP Increases the temperature (or adjusts the screen selection up when setting
advanced programming features)
d -- DOWN Decreases the temperature (or adjusts the screen selection down
when setting advanced programming features)

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Display backlighting
The display has two levels of lighting, high level and continuous low level. High
level lighting comes on for 10 seconds any time a button is pressed. Continuous
low level lighting is only available if the thermostat is operated from 24VAC. It
is not available with batteries. Continuous low level backlighting is a
configurable option (see configuration settings above).
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1
5
7
3
2
8
9
11
6
10
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A08089
Fig. 6 -- On screen indicators
On--Screen Indicators
1 Fan mode -- on or auto
2 Thermostat mode is off
3 Current Setpoint or Room temperature (if configured to display room temp)

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4 Thermostat mode is Cool
5 Thermostat mode is Heat
6 Thermostat mode is emergency heat
7 Fahrenheit
8Celsius
9 Battery strength indicator
10 Aux Heat is On
11 Compressor is On (if flashing, it is waiting to come on)
12 Current setpoint (if configured to display room temp)
Setting the temperatures for heating and cooling
Your thermostat is installed with the heating set at 68_F and the cooling set at
72_F. You can use these or change them so your room is as warm or as cool as
you would like it to be. These steps will hold the temperature where you set it.
1. To change the heating temperature, press the mode button on the left until
the screen says heat.
2. Press the up or down button located on the right side of the display until
you reach the desired temperature.
3. To change the cooling temperature, press the mode button on the left until
the screen says cool.
4. Press the up or down button located on the right side of the display until
you reach the desired temperature.
Using the fan
When the fan is on, it helps distribute air for a more even temperature in all
spaces. You can set the thermostat so the fan runs continuously (on) or only