Mandolyn Electronic Technology TRC650 User Manual

Table of Contents

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation Guide . . . . . . . . . . . . . . . . . . . . 4

Diagrams / Operation . . . . . . . . . . . . . . . . 15

LCD Display Diagrams . . . . . . . . . . . . . . . . . 16

Set ºC or ºF . . . . . . . . . . . . . . . . . . . . . . . . . 20

Set Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Program Heating / Cooling . . . . . . . . . . . . . 23

Humidifier control . . . . . . . . . . . . . . . . . . . . . 26

Fan control / ventilation . . . . . . . . . . . . . . . . 27

System Mode . . . . . . . . . . . . . . . . . . . . . . . . 27

Temporary Override . . . . . . . . . . . . . . . . . . . 28

Hold Function . . . . . . . . . . . . . . . . . . . . . . . . 28

Pre-comfort Recovery . . . . . . . . . . . . . . . . . 29

Usage Monitor . . . . . . . . . . . . . . . . . . . . . . . 29

Filter Change . . . . . . . . . . . . . . . . . . . . . . . . 29

Remote sensor / transmitter . . . . . . . . . . . 30

Optional Settings . . . . . . . . . . . . . . . . . . . . 33

Changing Batteries. . . . . . . . . . . . . . . . . . . . 39

Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Memory backup . . . . . . . . . . . . . . . . . . . . . . 40

Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Specifications . . . . . . . . . . . . . . . . . . . . . . . . 41

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 41

FEATURES

Therm ostat

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Compa tible with central heating /air co ndit ioning system s for autom atic tem perature control

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Autom atic chan ge-over for HE ATING/COOLING prog rams

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Conne cts t o humidifier for autom atic humidit y control

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Displays temperature (°C / °F)

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Remote tem perature control via remote sens or / transm itter

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Extra-l arge LCD display with backli ght

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isplay (12 or 24 hou r format)

Clock d

Temperature can be set in half de grees

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Autom atic, m anual and f an modes

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Selectable cycle rates for f urna ce ON/OFF i ntervals
Usage monit or

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Filter chan ge rem inde r

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Compa tible with milli volt & 24V hea ting system s

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Include s mounting hardw are and 3 “AA” batteri es

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Remote Sen sor / Tran smitter

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Displays c dit

Adjusts tem perature with rem ote RF trans mission

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Temperature can be set in half de grees

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Include s mounting hardw are and 2 “AAA” batteri es

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urren t tem perature and humi y

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Installation

Guide

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Installation Guide

Introduction

This thermostat can replace common residential thermostats. It is designed for use with most
central heating and air conditioning systems that use low voltage (24V or millivolt) system control.
Please see compatibility chart on the next page for more details.

Warning

We recommend consulting a licenced HVAC contractor to ensure the correct installation of the
thermostat. The only way to guarantee proper wiring is to have a qualified professional on site.

* NOT COMPATIBLE WITH ANY HIGH VOLTAGE 120/240 VOLT CIRCUIT.

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Compatibility

Generally, equipment with low voltage (24V or millivolt) system control is compatible with
heating/cooling programmable thermostats.

System Type

Gas - Standing Pilot
Gas - Electronic Ignition
Gas - Fire Boiler
Gas - Millivolt System
Oil - Fire Boiler
Oil - Fire Furnace

Electric Furnace
Electric Air Conditioner
Baseboard Electric Heater (120/240V)

Heat Pump/Single-Stage
Heat Pump/Multi-Stage

Compatible with Thermostat

Yes
Yes

Some models

Yes

Some models

Yes
Yes
Yes

No

No

No

* NOT COMPATIBLE WITH ANY HIGH VOLTAGE 120/240 VOLT CIRCUIT

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Installation

The following tools may be required for installation:

( ) Screwdriver

Masking Tape

(To wrap the exposed wires temporarily and to label
the disconnected wires)

Wire Stripper/Cutter

(If necessary, to strip the wires)

Power drill with a 3/16” bit

( If necessary, to drill holes on the wall )

Level

(If necessary, to level the thermostat)

Batteries (included)

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Choosing a location for the thermostat

Thermostat should be mounted:

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Approximately 5’ (1.5 m) from floor.

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Near or in a frequently used room, preferably on an inside partitioning wall.

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On a section of wall without pipes or duct-work.

Thermostat should NOT be mounted:

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Near a window, on an outside wall, or next to a door leading outside.

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Exposed to direct light or heat from a lamp, sun, fireplace, or other

temperature-radiating objects which may cause false readings.

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Near or in direct airflow from heat registers and air conditioners.

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Near concealed pipes and chimneys.

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In areas with poor air circulation, such as behind a door or in an alcove.

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Replacing the Old Thermostat

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Test the system to make sure that your heating and cooling systems are working properly before

(

installation If either does not work, contact a heating/air conditioning service person to fix the

)

problem before installation

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TURN OFF POWER to system at the furnace, or at the fuse/circuit breaker panel

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Carefully unpack your new thermostat and mounting plate; save package of screws,

instructions and receipt

Wiring

NOTE: WIRING COLORS ARE NOT ALWAYS STANDARDIZED, SO IT IS VERY IMPORTANT TO
LABEL ALL WIRES ACCORDING THE LETTER DESIGNATION ON YOUR OLD THERMOSTAT

(The wires are usually designated 'W', 'Y', 'G', 'RH', 'RC', 'W' ,'B', ‘O' or humidistat wires

Disconnect wires from old thermostat or sub-base

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As you disconnect each wire, label it with the old terminal designation

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Take care not to let the wires fall back into the wall or let the ends of the wires touch one another

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If there is an extra wire that is not connected to your old thermostat, then you won't need to connect

it to the new thermostat

)

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2-WIRE HEATING

(OPTIONAL)

JUMPER

Rc

Rh

W

H2

H1

Y

G

3-WIRE HEATING

Wiring Key

Regular Wiring

G - Fan output
Y - Cool output
H1 / H2 - Humidifier control
Rc - Common for Cooling and Fan
Rh - Common for Heating
W - Heat output

2 Wire Heating

Rc / Rh - Common
(Rc and Rh jumper is optional)

Rc

Rh

W

H2

H1

Y

G

Rc / Rh - Common (Rc and Rh
must be connected with jumper)

3 Wire Heating

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Wiring Diagrams

4-WIRE HEATING/COOLING

Rc

Rh

W

5-WIRE HEATING/COOLING

H2

H1

Y

G

Wiring Key

Regular Wiring

G - Fan output
Y - Cool output
H1 / H2 - Humidifier control
Rc - Common for Cooling and Fan
Rh - Common for Heating
W - Heat output

4 Wire Heating
Rc / Rh - Common (Rc and Rh
must be connected with jumper)

Rc

Rh

W

H2

H1

Y

G

2 separate transformers (Heat / Cool)
Rc / Rh - Common (wire separately,
jumper must not be installed)

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5 Wire Heating

Humidifier Wiring

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To wire a humidifier, the 2 wires connecting the original humidistat need to be

connected to the 2 terminals marked 'H1' and 'H2' on the thermostat.

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The original humidistat should be removed or set to 'OFF' position.

Note: The 2 humidifier control terminals 'H1' and 'H2' are electrically isolated from the Heat/Cool
terminals.

Note: H1 and H2 terminals are non polarized and there is no function difference between H1 and H2.

Humidistat should be
OFF or disconnected

W

Y

Rc

Rh

H2

H1

G

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Connecting the Wires to the Terminals

Connect the previously labeled wires to the corresponding
terminals, matching the designations. Use a screwdriver to
loosen the terminal, wrap the wires around the terminal then
tighten to securely fasten the wires. Make sure the wires do
not touch or short-circuit with other terminals.

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Depending on your heating/cooling equipment, you may need to connect between 2 to 7 wires

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If you have two ‘R’ wires, then connect each wire to its corresponding terminal and remove the

JUMPER between the RC and RH terminals

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If you are unsure of the connections please consult a certified HVAC contractor for the correct

installation of your thermostat.

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Mounting the back cover of the thermostat

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The back cover should be mounted vertically with the terminals on the top

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Thread the existing wiring through the big center hole from the back and set the back cover

vertically on the wall

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Select two appropriate mounting holes and mark the locations with a pencil (If necessary, use a

level to make sure the thermostat is positioned straight)

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Remove the back cover from the wall and drill two 3/16 inch holes in the marked screw positions

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Insert the wall anchors into the holes completely (If necessary, use a hammer to tap-in lightly)

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Mount the back cover to the wall using the two screws (Make sure the metal terminals are on the top)

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Attach the thermostat body to the back cover (that is already mounted on the wall)

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by carefully aligning the two pieces and pressing firmly until they snap together

First attach to backplate to the wall,
then press the faceplate into place

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