TC97-MHP General Information User Controls

TC97-MHP
Heat Pump — 2 Compressors with Auxiliary Heat
OPERATING INSTRUCTIONS
Your new thermostat has been designed to provide
accurate control and display of room temperature. In
addition, it will also display all relevant information
pertaining to your system.
The clearly marked buttons and informative display make
it extremely easy to understand and simple to use.
Please take a few moments to read the brief instructions
and familiarize yourself with the various functions in
order to obtain maximum benefit from this truly unique
electronic control.
General Information
The thermostat normally displays room temperature,
mode of operation and whether Cooling or Heating is
currently on. The six buttons on the front of the unit allow
complete control of the equipment.
You may select different heating and cooling setpoints for
the system to maintain, eg. 70° in heating and 75° in
cooling. Raising or lowering the setpoints in heating or
cooling is as simple as pushing a button. In addition, you
may choose °F or °C for the display.
The thermostat also allows you to select continuous fan
operation, (useful when using an air cleaner) or have the
fan come on with the equipment.
User Controls
MODE:
Select the desired mode of operation by repeated
pressing of the MODE button:
- controls Cooling system only (the word “Cool” is
displayed for 5 seconds).
- controls Heating system only (the word “Heat” is
displayed for 5 seconds).
- controls both heating and cooling (auto
changeover) (the word “Auto” is displayed for 5
seconds).
eht- Emergency Heat.
0ff - disables thermostat so equipment will not operate.
Avoid using the OFF mode during extremely cold
weather to prevent damage from freezing.
HEATING:
Select the temperature you want your equipment to
maintain while in the heating mode by pressing and
holding the
or
buttons. The control setpoint
temperature is displayed for 5 seconds after releasing
the button.
FAN:
The fan will come on automatically when the system is
operating, but there is no indication of this on the display.
To select continuous Fan operation, press the FAN
button and the display will show
. This is
recommended for electronic air cleaners or continuous
ventilation requirements.
NOTE: The thermostat never allows less than 2°F (1°C)
difference between the heating and cooling setpoints.
TEMPERATURE ACCURACY
COOLING:
Select the temperature you want your equipment to
maintain while in the cooling mode by pressing and
holding the
or
buttons. The control setpoint
temperature is displayed for 5 seconds.
Full temperature accuracy will only be realized after the
thermostat has been installed and powered for at least
one hour.
SEE REVERSE FOR INSTALLATION INSTRUCTIONS
USER CONTROLS (Cont’d.)
LIMITED OVERRIDE
ADD-ON HEAT PUMPS:
OUTDOOR (ODT) BUTTON:
When the keyboard is locked, (switch #4 “ON”), the user
may override the temperature setpoint for 1 hour by
pressing either the
or
buttons. The range of
temperature override is ± 3 °F or °C from the
programmed daytime setpoint.
Your thermostat is equipped to enhance the performance
of an Add On heat pump. Your thermostat, in most
applications, will perform the function of a fossil fuel kit.
When the outdoor temperature sensor option is
connected to your thermostat, you can display the
current outdoor temperature by pressing the outdoor
button. If the option is not connected, the thermostat will
.
display -DAY/NIGHT BUTTON:
When the thermostat is initially installed, the display will
show the
symbol for your day temperature. By
pressing the DAY/NIGHT button or closing the CLK1 and
CLK2 terminals on the back of the thermostat (installer
connected) you may select an alternate or night
temperature. The thermostat will remember this setpoint.
Simply press the Day/Night button to alternate between
temperature settings.
CLOCK TERMINALS (OPTION)
CLK1 - CLK2
Your thermostat is equipped with Remote Clock
Terminals. By connecting a remote clock/timer (DSP-AT
or equivalent) the thermostat can be alternated between
the Day/Night setpoints automatically.
Remote Sensor (Option)
RS1 - RS2 - RS+V
The thermostat is designed to accept the Electronic
Remote Sensor which will allow you to locate your
thermostat in an area away from view.
CELSIUS/FAHRENHEIT
ECONOMY/COMFORT:
Simultaneously press
and
to switch between
Celsius and Fahrenheit temperature display.
In the Economy mode (switch #5 OFF) your thermostat
will not allow the equipment to be forced on with a
change to the temperature setpoint. In the Comfort
mode, the equipment will turn on immediately with a
change to the temperature setpoint.
To select Add-on, place switch #1 to the “ON” position.
The thermostat will turn the compressor off with a call for
Aux. heat. When the switch is set to normal, the
thermostat will allow the compressor and the Aux. heat
to be on at the same time.
Copyright 2010, Schneider Electric
All brand names, trademarks and registered
trademarks are the property of their respective
owners. Information contained within this
document is subject to change without notice.
Schneider Electric
1354 Clifford Avenue
P.O. Box 2940
Loves Park, IL 61132-2940
POWER FAILURES
Your thermostat employs the latest developments in solid
state electronic technology.
One of the unique features of your thermostat is that
there is no battery required to maintain your selected
setpoints in the event of a power loss as the memory is
unaffected by power failures of any duration.
When power is restored, the thermostat will continue
operating as if the power had never been off.
www.schneider-electric.com/buildings
On October 1st, 2009, TAC became the Buildings
business of its parent company Schneider Electric.
This document reflects the visual identity of Schneider
Electric, however there remains references to TAC as a
corporate brand in the body copy. As each document is
updated, the body copy will be changed to reflect
appropriate corporate brand changes.
Model TC97-MHP
M4242-01
Doc #ALT01378 F-26405-5
97342
Installation Procedures
LOCATION:
To ensure proper operation, the thermostat should be
mounted on an inside wall in a frequently occupied area
of the building. In addition, its position must be at least
18" (46 cm) from any outside wall, and approximately 5’
(1.5 m) above the floor in a location with freely circulating
air of an average temperature.
BE SURE TO AVOID THE FOLLOWING LOCATIONS:
– Behind doors or in corners where freely circulating air
is unavailable.
– Where direct sunlight or radiant heat from appliances
might affect control operation.
– On an outside wall.
– Adjacent to, or in line with, conditioned air discharge
grilles, stairwells, or outside doors.
– Where its operation may be affected by steam or
water pipes or warm air stacks in an adjacent partition
space, or by an unheated/uncooled area behind the
thermostat.
– Where its operation will be affected by the supply air
of an adjacent unit.
– Near sources of electrical interference such as arcing
relay contacts.
1. Insert a flat blade screwdriver or a coin 1/8" into the
slot located in the bottom center of the thermostat
case and twist 1/4 turn. When you feel or hear a
“click”, grasp the case from the bottom two corners
and separate from the subbase as shown in the
diagram at the right. Some models require more force
than others when separating due to the number of
terminals on the subbase.
2. Swing the thermostat out from the bottom.
3. Lift the thermostat up and off the subbase.
4. Place the rectangular opening in the subbase over the
equipment control wires protruding from the wall and,
using the subbase as a template, mark the location of
the two mounting holes (exact vertical mounting is
necessary only for appearance).
5. Use the supplied anchors and screws for mounting on
drywall or plaster; drill two 3/16" (5mm) diameter
holes at the marked locations; use a hammer to tap
the nylon anchors in flush to the wall surface and
fasten subbase using the supplied screws. Do not
overtighten!
6. Connect the wires from your system to the thermostat
terminals as shown in the wiring diagrams. Carefully
dress the wires so that any excess is pushed back into
the wall cavity or junction box. Ensure that the wires
are flush to the plastic subbase. The access hole
should be sealed or stuffed to prevent drafts from the
wall affecting the thermostat.
7. Before the thermostat is re-installed on the subbase,
install the optional clock/timer, indoor remote sensor
and outdoor remote sensor, if used. Refer to the
installation instructions supplied with each option.
Also, check the position of the slide switches on the
back of the thermostat.
Replacing The Thermostat On
The Subbase
1. Position the thermostat on the hinged tabs located at
the top of the subbase.
2. Gently swing the thermostat down and press on the
bottom center edge until it snaps in place.
Specifications
Rated Voltage
Rated A.C.
Current
Rated D.C.
Current @ ‘R’
Control Range
Thermostat
Measurement
Range
O.D.T.
Measurement
Range
Control
Accuracy
Minimum
Deadband
20-30 Vac, 24 nominal
.050 Amps to 0.75 Amps
continuous per output with surges
to 3 Amp Max.
0 Amps to 0.75 Amps continuous
per output with surges to 3 Amp
Max.
Heating: 38 to 88°F in 1° steps,
5 to 30°C in 1° steps
Cooling: 60 to 108°F in 1° steps,
16 to 40°C in 1° steps
28 to 124°F or 0 to 48°C
-40 to 124°F or -40 to 48°C
±.5°C at 20 °C, ±1°F at 68°F
(between heating and cooling) 2°F
or 1°C
Note: This thermostat contains electronic circuitry
replacing the conventional mechanical anticipator.
Output Terminal Functions
W1
Auxiliary Heat is energized as back-up or Emergency
Heat
Y1
Compressor energized with a call for heating and
cooling
Y2
Compressor is energized for 2nd stage heating or
cooling (if multistage selected)
G
Fan is energized with a call for heating or cooling or
selected by fan button
R
Independant switching voltage
24 Vac
24 Vac
24 Vac (c)24 Vac (Common)
O
Energizes the reversing valve continuously in Cooling
Mode
B
Energizes the reversing valve continuously in Heating
and Off mode
LED1, LED2
Free lights for status or function
indication
LED3
Auxiliary heat Indicator
CLK1, CLK2
Use with remote clock/timer for alternate
setpoints.
RS2, RS1, RS+V
Use to connect Outdoor Temperature
Sensor option and/or Indoor Remote
Sensor option. Refer to the instructions
included with the sensors.
Model TC97-MHP
M4242-01
Doc #ALT01378 F-26405-5
97342
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