Toptech TT-N-751 Installation Manual

INSTALLATION MANUAL

This manual covers TopTech models:

TT-N-751

Thermostat Applications Guide

noitpircseD

Gas or Oil Heat

Electric Furnace

Heat Pump (No Aux. or Emergency Heat)

Heat Pump (with Aux. or Emergency Heat)

Multi-stage Systems

Heat Only Systems

Cool Only Systems

Millivolt

Table of Contents

Installation Tips
Thermostat Quick Reference
Subbase Installation
Wiring
Technician Setup Menu
Mounting and Battery Installation
Specifications

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Page

2
3
4
5

6-7

8
9

Power Type

Battery Power
Hardwire (Common Wire)
Hardwire (Common Wire) with Battery Backup

A trained, experienced technician
must install this product.

Carefully read these instructions. You
could damage this product or cause a
hazardous condition if you fail to follow
these instructions.

Una versión española de este
manual puede ser descargada
en http://toptech.pro1iaq.com

® U.S. Registered Trademark. Patents pending.
Copyright © 2010 Pro1 IAQ, Inc. All rights reserved.

Need Help?

For assistance with this product please
visit http://toptech.pro1iaq.com or call our
Customer Care Center toll-free at
1-888-776-1427 during normal business
hours (Mon-Fri 9 AM - 6 PM Eastern)

Rev. 1019

1

Wall locations

The thermostat should be installed approximately 4 to 5 feet above the floor.
Select an area with average temperature and good air circulation.

INSTALLATION TIPS

NO NO YES

NO

Do not install thermostat in locations:

• Close to hot or cold air ducts

• That are in direct sunlight

• With an outside wall behind the thermostat

• In areas that do not require conditioning

• Where there are dead spots or drafts (in corners or behind doors)

• Where there might be concealed chimneys or pipes

• Where appliances could radiate heat

TopTech Tip

Pick an installation location that is easy for the user to access.
The temperature of the location should be representative of the building.

2

Getting to know your thermostat

2

5

3

1

6

4

LCD

1

Menu Options:

Shows different
options

Low Battery
Indicator:

Replace batteries
when this indicator
is shown.

Indicates the
current room
temperature.

Displays the user
selectable setpoint
temperature.

+1 will appear in
the display when
second stage of
heat or cool is on.
+2 will appear for
third stage of heat.

System:

Selects heat, off
or cool as needed.

8

7

The COOL, HEAT or FAN icon will display when the COOL,
HEAT or FAN is on.NOTE: The compressor delay feature is

active if these icons are flashing. The compressor will not
turn on until the 5 minute delay has elapsed.

2

Light Button (Glow in the Dark)

3

Fan Button

4

System Button

5

Menu Buttons

6

Temperature Setpoint Buttons

Battery Door

7

Universal Private Label Badge

8

Important:

The low battery indicator is displayed
when the AA battery power is low. If the
user fails to replace the battery within
21 days, the thermostat display will only
show the low battery indicator as a final
warning before the thermostat
becomes inoperable. The batteries are
located on the front of the thermostat.

Removing the dealer imprinting badge

TopTech Tip

All TopTech thermostats use the same universal magnetic badge.
Visit our website at toptech.pro1iaq.com to learn more about our dealer imprinting programs

3

SUBBASE INSTALLATION

Caution:
Electrical Hazard

Failure to disconnect the
power before beginning to
install this product can cause
electrical shock or equipment
damage.

For vertical mount put
one screw top and one
screw bottom.

For horizontal mount put
one screw left and one
screw right.

Mercury Notice:

All of TopTech’s products are
mercury free. However, if the
product you are replacing
contains mercury, dispose of it
properly. Your local waste
management authority can give
you instructions on recycling
and proper disposal.

Vertical mount

Horizontal mount

NOTE: To insure a

solid fit between
the thermostat and
the subbase,
mount the subbase
on a flat wall with
the drywall anchors
flush to the wall.

C

O

B

W/E

W2

Vertical mount

UP

RH

RC

G

Y

Y2

Horizontal mount

4

WIRING

Wiring

If you are replacing a thermostat, make note of

1.

the terminal connections on the thermostat that
is being replaced. In some cases the wiring
connections will not be color coded. For
example, the green wire may not be connected
to the G terminal.

Loosen the terminal block screws. Insert wires

2.

then retighten terminal block screws.

Place nonflammable insulation into wall

3.

opening to prevent drafts.

Push wire into the wall so the thermostat can

4.

Wire specifications

Use shielded or non-shielded
18 - 22 gauge thermostat wire.

mount securely to the subbase.

Terminal Designations

This thermostat is shipped from the factory to operate a conventional heating and cooling system. This thermostat will
also operate a heat pump system. See the “heat pump” configuration step on page 7 of this manual to configure the
thermostat for heat pump applications.

Warning:

All components of the control
system and the thermostat
installation must conform to
Class II circuits per the NEC Code.

Terminal

RC

RH

C

B

O

G

W/E

W2

Y

Y2

2 Heat 2 Cool

Conventional System

Transformer power (cooling)

Transformer power

(heating)

Transformer common

(For 2 transformer systems,

use RH common.)

Energized in heating

Energized in cooling

Fan relay

First stage of heat

Second stage of heat

First stage of cool

Second stage of cool

2 Heat 2 Cool

Heat Pump System

Transformer power

(cooling)

Transformer power

(heating)

Transformer common

Heat pump changeover valve

energized in heating

Heat pump changeover valve

energized in cooling

Fan relay

Emergency heat relay

Auxiliary heat relay,

second stage of heat

First stage of heat & cool

Second stage of cool

3 Heat 2 Cool

Heat Pump System

Transformer power

(cooling)

Transformer power

(heating)

Transformer common

Heat pump changeover valve

energized in heating

Heat pump changeover valve

energized in cooling

Fan relay

Emergency heat relay

Auxiliary heat relay,

third stage of heat

First stage of heat & cool

Second stage of cool

& second stage of heat

TopTech Tips:

C terminal

The C (common wire) terminal does not
have to be connected when the thermostat is
powered by batteries.

Note:

In many systems with no emergency
heat relay a jumper can be installed
between E and W2.

5

Technician Setup Menu

This thermostat has a technician setup menu
for easy installer configuration. To set up the
thermostat for your particular application:

Press MENU button

1.

Press and hold the TECH SET button for

2.

3 seconds. This 3 second delay is
designed so that homeowners do not
accidentally access the installer settings.

Tech Setup Steps

TECHNICIAN SETUP MENU

3.

Configure the installer options as
desired using the table below.

Use the or keys to
change settings and the NEXT key
to move from one option to the next.
Note: Only press DONE key when
you want to exit the Technician Setup
options.

Filter

Change

Reminder

This feature will flash
FILT in the display
after the elapsed run
time to remind the
user to change the
filter. A setting of
OFF will disable this
feature.

You can adjust the
filter change
reminder from OFF
to 2000 hours of
runtime in 50 hour
increments.

Room

Temperature

Calibration

This feature allows
the installer to change
the calibration of the
room temperature
display. For example,
if the thermostat
reads 70° and you
would like it to read
72° then select +2.

You can adjust the
room temperature
display to ready -4°F
to +4°F above or
below the factory
calibrated reading.

Minimum

Compressor

On Time

This feature allows the
installer to select the
minimum run time for
the compressor.
For example, a setting of
4 will force the
compressor to run for at
least 4 minutes every
time the compressor
turns on, regardless of
the room temperature.

You can select the
minimum compressor
run time from “off”,
“3”, “4”, or “5” minutes.
If 3, 4, or 5 is selected,
the compressor will run
for at least the selected
time before turning off.

Compressor

Short Cycle Delay

The compressor short
cycle delay protects the
compressor from “short
cycling”. This feature will
not allow the compressor
to be turned on for 5
minutes after it was last
turned off.

Selecting ON will not
allow the compressor to
be turned on for 5
minutes after the last
time the compressor was
on. Select OFF to
remove this delay.

Cooling

Swing

The swing setting, often
called “cycle rate”,
“differential” or
“anticipation” is
adjustable. A smaller
swing setting will cause
more frequent cycles and
a larger swing setting will
cause fewer cycles.

The cooling swing
setting is adjustable
from ±0.2°F to ±2°F.
For example: A swing
setting of 0.5°F will turn
the cooling on at
approximately 0.5°F
above the setpoint and
turn the cooling off at
approximately 0.5°F
below the setpoint.

Heating

Swing

The swing setting, often
called “cycle rate”,
“differential” or
“anticipation” is
adjustable. A smaller
swing setting will cause
more frequent cycles and
a larger swing setting
will cause fewer cycles.

The heating swing
setting is adjustable
from ±0.2°F to ±2°F.
For example: A swing
setting of 0.5°F will
turn the heating on at
approximately 0.5°F
below the setpoint and
turn the heating off at
approximately 0.5°F
above the setpoint.

OFF 0 ºF OFF ON 0.5 ºF 0.4 ºF

TECH SETUP

STEPS CONTINUED

ON THE NEXT PAGE

6

Tech Setup Steps (Continued from the previous page)

TECHNICIAN SETUP MENU

ºF or ºC

Select F for Fahrenheit
temperature read out
or select C for Celsius
read out

Fan

Operation

Select GAS for
systems that control
the fan during a call
for heat.

Select ELEC to have
the thermostat
control the fan during
a call for heat.

Heat Pump

When turned on the
thermostat will
operate a heat pump.

1. EM.Heat will show
as an option in the
system switch.

2. Y will be first stage
of heat & cool, W/E
will be emergency heat
relay & W2 will be
auxiliary heat relay.

System

Switch

You can configure the
system switch for the
particular application:

Heat - Off - Cool,
Heat - Off,
Cool - Off,

Note: EM. Heat will
show if in heat pump
mode.

Gas Auxiliary

for Heat Pump

This option will turn
the heat pump off 45
seconds after the
auxiliary heat relay
turns on.

For 2 heat applications,
the first stage will turn
off 45 seconds after the
auxiliary stage turns
on.

For 3 heat applications,
the first and second
stage will turn off 45
seconds after the
auxiliary stage turns
on.

Stages

of Heat

You can configure the
thermostat to operate
a 3 stage heat pump
system.

2H = 2 heat, 2 cool
3H = 3 heat, 2 cool

Cooling Fan

Delay

The cooling fan delay
setting will delay the
fan from coming on in
cool mode and keep
running after the
compressor shuts off for
a short time to save
energy in some systems.

ºF for Fahrenheit

ºC for Celsius

ºF

GA

or

EL

GAS

OFF configures the
thermostat for non
heat pump systems

ON configures the
thermostat for heat
pump systems

OFF

Use the or
key until the desired
application is flashing.

Heat - Off - Cool

For heat pump systems
that are “dual fuel”
(use a gas furnace for
auxiliary stage heat)
you can turn this
feature on to turn off
the heat pump when
the auxiliary stage of
heating has been
called for.

OFF OFF2 Stages

Use the or
key to change between
2 heat and 3 heat.

2 heat will use Y1 as
first stage and W2 as
auxiliary.

3 heat will use Y1 as
first stage, Y2 as
second stage and W2
as auxiliary.

ON THE NEXT PAGE

TECH SETUP

STEPS CONTINUED

You can select the
Cooling Fan Delay from
"Off" , "15" ,"30", "60"
or "90" seconds. If 15,
30, 60 or 90 is selected
the fan will not turn on
for that many seconds
when there is a call for
cool and will run for
that many seconds after
satisfying a call for cool.

TopTech Tip

The second stage will turn on at 2x the swing setting. The second stage will turn off when 1x the
swing is reached. For example, if the swing setting is .8 degrees for heating and the thermostat is
set at 70ºF, the first stage will turn on at approximately 69.2ºF. The second stage will turn on at

68.4ºF. The second stage will turn off at 69.2ºF and the first will turn off at 70.8ºF. If third stage is
used, it will turn on at 3x the swing and turn off at approximately 2x the swing.

7

MOUNT THERMOSTAT & BATTERY INSTALLATION

Mount Thermostat

Align the 4 tabs on the subbase with
corresponding slots on the back of the
thermostat, then push gently until the
thermostat snaps in place.

Note: To insure a solid fit between

the thermostat and the subbase:

mount subbase to flat wall

1.

use screws provided

2.

drywall anchors should be

3.

flush with the wall

wires should be pushed into the wall

4.

C

O

B

W/E

W2

8

Specifications

TopTech by Pro1

1111 S. Glenstone
Suite 2-100
Springeld, MO 65804

Toll-free: 1-888-776-1427
Toll Number (Outside the USA): 330-821-3600
Web: http://toptech.pro1iaq.com
Hours of Operation: Monday - Friday 9 AM - 6 PM Eastern

SPECIFICATIONS & CONTACT INFORMATION

The display range of temperature
The control range of temperature
Load rating
Display accuracy
Swing (cycle rate or differential)

Power source

Operating ambient
Operating humidity
Dimensions of thermostat

41ºF to 95ºF (5ºC to 35ºC)
44ºF to 90ºF (7ºC to 32ºC)
1 amp per terminal, 1.5 amp maximum all terminals combined
± 1ºF
Heating is adjustable from 0.2ºF to 2.0ºF
Cooling is adjustable from 0.2ºF to 2.0ºF
18 to 30 VAC, NEC Class II, 50/60 Hz for hardwire (common wire)
Battery power from 2 AA Alkaline batteries
32ºF to +105ºF (0º to +41ºC)
90% non-condensing maximum

4.7”W x 4.4”H x 1.1”D

9