Bryant T1-PHP, T1-PAC User Manual
T1--PAC
T1--PHP
LEGACY LINE--RNC
PROGRAMMABLE THERMOSTATS
Installation Instructions
Designed and Assembled
in the USA.
A07109
Legacy Line--RNC Series Programmable Thermostat
NOTE: Read the entire instruction manual before starting the
installation
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.........................
INTRODUCTION 1...................................
INSTALLATION CONSIDERATIONS 1...................
INSTALLATION 1....................................
Step 1 — Thermostat Location 1........................
Step 2 — Install Thermostat 2...........................
Step 3 — Set Thermostat Configuration 2.................
Step 4 — Understand Thermostat Operation 2..............
Step 5 — Check Thermostat Operation 3..................
WIRING DIAGRAMS 4................................
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency muse use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local
building codes and the current editions of the National Electrical
Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. This is the safety--alert symbol
When you see this symbol on the unit and in the instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING,and
CAUTION. 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 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
There are two Legacy Line--RNC Series programmable thermostat
models, one for AC applications and one for HP applications. Both
are dual powered, operating from either 24VAC or two alkaline
AA batteries. Configuration and program schedules are stored in
non--volatile memory, preserving this information during power
loss and battery removal. Features include simplified 5/2
programming, large backlit display, and modern styling.
The AC model provides one stage of heating and one stage of
cooling.
The HP model provides two stages of heating and one stage of
cooling.
INSTALLATION CONSIDERATIONS
AC Operation
For 24VAC operation, both the R and C wires must be connected
to the 24VAC power source. Batteries are not needed.
Battery Operation
When batteries are used, the common (C) connection is not needed,
saving a wire, and eliminating 24VAC operation. The thermostat
continues to operate in the event of a power failure. Battery life is
expected to be one year. A “low battery” reminder tells the
homeowner when it is time to replace the batteries. When
connected without the common wire, the thermostat will not
operate without batteries. Continuous back--lighting is not
available.
Both Battery and AC Operation
If both batteries and 24VAC operation are used (batteries installed
and the common wire connected), and indefinite clock operation
are provided, the battery will be used only during AC power loss,
extending battery life to nearly its shelf life.
A jumper has to be properly set for backlight operation. J2 should
be set in the “AC” position when the thermostat is operated from
24VAC. J2 should be set in the “BAT” position when the
thermostat is operated from batteries. The thermostat will continue
to operate if J2 is not in the correct position or not connected.
However, the backlight will not operate.
INSTALLATION
IMPORTANT: Install batteries last to ensure proper thermostat
mounting and latch engagement.
Step 1 — Thermostat Location
Thermostat should be mounted:
S Approximately 5 ft (1.5m) from floor.
S Close to or in a frequently used room, preferably on an inside
partitioning wall.
S On a section of wall without pipes or duct work.
Thermostat should NOT be mounted:
S Close to a window, on an outside wall, or next to a door leading
to the outside.
S Exposed to direct light and heat from the sun, a lamp, fireplace,
or other heat--radiating object which may cause a false reading.
S Close to or in direct airflow from supply registers and return--air
grilles.
S In areas with poor air circulation, such as behind a door or in an
alcove.
Step 2 — Install Thermostat
T1--PAC / T1--PHP
IMPORTANT: Install batteries last to ensure proper thermostat
mounting and latch engagement.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing thermostat, turn off all power to unit. There
may be more than 1 disconnect. Lock out and tag switch with
a suitable warning label.
6. Secure back plate to wall with 2 anchors and screws
provided making sure all wires extend through hole in
plastic.
NOTE: Anchoring the back plate will maximize proper mounting
plate flatness and allow latch to fully engage.
7. Connect wires to proper terminal location on backplate.
8. Push any excess wire back into wall. Seal hole in wall to
prevent air leaks. Leaks can affect thermostat operation.
Any excess wire left inside thermostat casing may also affect thermostat operation by interfering with airflow across
the temperature sensor.
9. Set the thermostat front housing into the (2) latches
(notches) on the bottom of the back plate.
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10. Rotate the front housing forward and press on the faceplate
with thumbs near the Up/Down arrows on the right and the
“H/C” and fan symbols on the left side of the display. Do
this with a moderate amount of pressure.
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, one at a
time. Be careful not to allow wires to fall back into wall.
c. As each wire is disconnected, record wire color and
terminal marking.
d. Discard or recycle old thermostat.
!
CAUTION
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.
3. Separate front and back plastic assembly of thermostat.
4. Route thermostat wires through 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.
5. Drill two 3/16--in. (5 mm) mounting holes in wall where
marked.
A08427
11. If necessary, continue to rotate the front housing forward
and press to engage the top corner latches.
A08428
12. Snap thermostat together making sure assembly is secure.
2
13. Install the batteries.
14. Turn ON power to unit.
On power up, depending on the thermostat model being used, the
LCD readout will display either AC for air conditioner model
(1--stage heat/1--stage cool) or HP for heat pump model (2--stage
heat/1--stage cool).
Step 3 — Set Thermostat Configuration
Configuration options enable the installer to configure the
thermostat for a particular installation.
These are not presented to the homeowner and therefore must be
properly set by the installer. Following is a list of the options
available, an explanation of their function, and their factory default
settings. Not all numbers are used in the Legacy Line--RNC Series
because not all options are available in this series.
Configuration Options -- Summary:
Option 01 -- Equipment type
Option 03 -- Fahrenheit/Centigrade
Option 04 -- Fan (G) on with W output
Option 10 -- Reversing valve
Option 13 -- Room air temperature offset
Option 21 -- Keypad Lockout
Option 26 -- Minimum Cooling Setpoint
Option 27 -- Maximum Heating Setpoint
To Enter The 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
configuration number, now 01, will appear in the
setpoint/temperature location and the configuration setting will
appear in the clock location. The configuration number (left pair)
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 H/C key. Successive presses of the H/C key alternate
between the configuration number (left) and the configuration
setting (right). To exit the configuration mode, press the
HOLD/END key. If no key is pressed for 3 minutes, the
configuration mode will automatically exit, returning the
thermostat to normal operation.
Configuration Options -- Selection:
Option 01 -- Equipment type
Selections: with HP thermostat: HP, AC, PH, or PC
with AC thermostat: AC or PC
Meanings:
PH or PC selects PTAC units (Packaged Terminal Air
Conditioners) which are used in motel rooms and other rented
spaces. When this option is selected, the display shows only the
setpoint, not the room temperature. Also, the compressor
timeguard is disabled, allowing the compressor to turn on
immediately when a demand is established.
HP or PH controls 1 speed heat pump with 1 stage of aux heat.
AC or PC controls 1 speed air conditioner with one stage of heat.
Note that this option allows a HP thermostat to be converted to
control an AC system.
Option 03 -- Fahrenheit/Centigrade
Selections: F = Fahrenheit — This is default.
C = Centigrade.
Selects temperature display units.
Option 04 -- Fan (G) ON with W output
Selections: OF = G not energized with W — This is default.
ON = G energized with W.
This selection determines whether the fan (G) is to be ON or OFF
when the W (furnace or strip heat) is ON. Furnaces and fan coils
which manage their own blowers do not require a separate G
signal. Some auxiliary heaters require a separate G signal to operate
the blower when W is applied.
This option allows a HP thermostat to control an AC system.
Option 10 -- Reversing valve
Selections: C = reversing valve energized in cooling —This is
default.
H = reversing valve energized in heating — Only
appears in HP systems.
Option 13 -- Room Air Temperature Offset
Selections: ±5_F/±3_C. Default is 0.
The number of degrees to be added to the displayed temperature to
calibrate or deliberately miscalibrate the measured room
temperature. This option is in _FevenifOption3issetfor_C.
Option 21 -- Keypad Lockout
Selections: ON, OF — Default is OF.
With OF selected, the keypad cannot be locked. With ON selected
the keypad will be locked and can be unlocked by simultaneously
pressing the UP and DOWN keys for 5 seconds. Once unlocked, it
will relock 2 minutes after the last keypad press. If any key is
pressed and the thermostat is locked, “loc” will be displayed in the
clock digits.
Option 26 -- Minimum Cooling Setpoint
Selections: 50_ to 90_F/10_ to 32_C—Defaultis52_F/11_C.
Sets the lowest cooling setpoint available to the user.
Option 27 -- Maximum Heating Setpoint
Selections: 50_ to 90_F/10_ to 32_C—Defaultis88_F/31_C.
Sets the highest heating setpoint available to the user.
Step 4 — Understand Thermostat Operation
Temperature Display
Thermostat will display room temperature until UP or DOWN
button is pressed. The words SET TEMP appear when these
buttons are pressed and the current setpoint is displayed. If no
buttons are pressed for 5 sec, the display will change back to show
room temperature.
Backlighting
Continuous backlighting is not available. The backlight will come
on for 10 seconds after any button press. Without AC power and
when the battery is low, the backlight will remain off with button
presses.
Battery Indicator
A battery indication icon on the display shows nothing, half, or
low/no battery condition. If the battery is full or operation is from
AC power, no icon appears. Under battery operation, if the battery
is half full, a half full battery icon appears. As the battery depletes
below half, the icon remains at half, but the 10 second backlight
disappears. When the battery is absent or depleted, the display goes
blank except for an empty battery icon and all outputs are turned
off.
Timeguard Timer
A 5--minute timeguard is built into the thermostat immediately
upon power up, and any time the compressor turns off. The
compressor will not turn on until the timeguard has expired. The
timeguard affects only compressor operation. Pressing UP and
FAN buttons simultaneously will override the timeguard for 1
cycle. If PTAC operation (PH or PC) is selected under Option 1,
the timeguard timer is eliminated.
Cycle Timer
In normal heating and cooling operation the thermostat will not
allow more than 4 equipment cycles per hour (or 1 cycle every 15
minutes). Both the Y and W outputs have a 15--minute timer that
starts counting down when the output is turned on, (e.g., if Y
output is turned on for 9 minutes and then satisfies, it cannot turn
back on for another 6 minutes regardless of demand). However,
T1--PAC / T1--PHP
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