PRO T751 Thermostat Installation Guide
- June 3, 2024
- Pro
Table of Contents
PRO T751 Thermostat
Pro1 Technologies
- P.O. Box 3377
- Springfield, MO 65808-3377
- Toll-Free: 888-776-1427
- Web: www.pro1iaq.com
- Hours of Operation: M-F 9 AM – 6 PM Eastern
Thermostat Application Guide
Description|
---|---
Gas or Oil Heat| Yes
Electric Furnace| Yes
Heat Pump (No Aux. or Emergency Heat)| Yes
Heat Pump (With Aux. or Emergency Heat)| Yes
Multi-Stage Systems| Yes
Heat Only Systems| Yes
Cool Only Systems| Yes
Millivolt| Yes
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.
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 Tip
Pick an installation location that is easy for the user to access. The
temperature of the location should be representative of the building.
Subbase Installation
- Horizontal Mount
- Vertical Mount
For vertical mount put one screw on the top and one screw on the bottom. For horizontal mount put one screw on the left and one screw on the right.
Do not install thermostats in locations
- Close to hot or cold air ducts
- Those 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
Installation Tip
Electrical Hazard Failure to disconnect the power before beginning to install
this product can cause electrical shock or equipment damage.
Mercury Notice
All of our 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.
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.
Battery Installation
Battery installation is optional if the thermostat is hardwired (R and C terminal connected to 24V power).
Important
High-quality alkaline batteries are recommended. Rechargeable batteries or
low-quality batteries do not guarantee a 1-year life
span.
About The Private Label Badge
All of our thermostats use the same universal magnetic badge. Visit the
company website to learn more about our free private label program.
Gently slide a screwdriver into the bottom edge of the badge. Gently turn the screwdriver counterclockwise. The badge is held on by a magnet in the well of the battery door. The badge should pry off easily. DO NOT USE FORCE.
Thermostat Quick Reference
- LCD Display
- Glow in the dark light button
- Fan Button
- System Button
- Temperature Setpoint Buttons
- Private Label Badge
Getting to know your thermostat
- Indicates the current room temperature
- Setpoint: Displays the selected setpoint temperature.
- System Operation Indicators: The COOL ON, HEAT ON or FAN ON will display when the COOL, HEAT, or FAN is on. The compressor delay feature is active if these are flashing.
- Low Battery Indicator: Replace batteries when this indicator is shown.
- Globe: Globe is displayed if an energy-efficient temperature has been selected.
- Fan: Indicates the current fan setting.
- Stages: +1 will appear in the display when the first stage of heat or cool is on. +2 will appear for the second stage of heat.
- System: Indicates current system mode setting.
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 screen will only
show the low battery indicator but maintain all functionality. If the user
fails to replace the batteries after an additional 21 days (days 22-42 since
the first “low battery” display) the setpoints will change to 55˚F (Heating)
and 85˚F (Cooling). If the user adjusts the setpoint away from either of
these, it will hold for 4 hours then return to either 55˚F or 85˚F. After day
63 the batteries must be replaced immediately to avoid freezing or overheating
because the thermostat will shut the unit off until the batteries are changed.
Wiring
- If you are replacing a thermostat, make note of 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 then retighten terminal block screws.
- Place non-flammable insulation into wall opening to prevent drafts.
Failure to disconnect the power before beginning to install this product can cause electrical shock or equipment damage.All components of the control system and the thermostat installation must conform to Class II circuits per the NEC Code.
Terminal| 2 Heat 2 Cool Conventional System| 2 Heat 1 Cool Heat Pump System| 3
Heat 2 Cool Heat Pump System
---|---|---|---
RC| Transformer power (cooling)| Transformer power (cooling)| Transformer
power (cooling)
RH| Transformer power (heating)| Transformer power (heating)| Transformer
power (heating)
C| Transformer common| Transformer common| Transformer common
B| Reverse Valve / Configurable Terminal| Reverse Valve / Configurable
Terminal| Reverse Valve / Configurable Terminal
O| Reverse Valve / Configurable Terminal| Reverse Valve / Configurable
Terminal| Reverse Valve / Configurable Terminal
G| Fan relay| Fan relay| Fan relay
W/E| First stage of heat| First stage of emergency heat| First stage of
emergency heat
W2| Second stage of heat| Auxiliary heat relay, second stage of heat|
Auxiliary heat relay, third/fourth stage of heat
Y| First stage of cool| First stage of heat & cool| First stage of heat & cool
Y2| Second stage of cool| N/A| Second stage of cool & second stage of heat
C Terminal
The C (common wire) terminal does not have to be connected when the thermostat
is powered by batteries.
Wire Specifications
Use shielded or non-shielded 18-22 gauge thermostat wire.
Installation Tip
Do not overtighten terminal block screws, as this can damage the terminal
block. A damaged terminal block can keep the thermostat from fitting on the
sub-base correctly or cause system operation issues. Max Torque = 6in-lbs.
- Power supply
- Factory-installed jumper. Remove only when installing on a 2-transformer system.
- Use either O or B terminals for changeover valve.
- Optional 24 VAC common connection when the thermostat is used in battery power mode.
Note: This thermostat is hardwire powered when the 24V transformer is connected to the Common and RC terminals of the thermostat.
Note: In many systems with no emergency heat relay a jumper can be used
between E and W2.
Wiring Diagrams
Tech Settings
Swing Setting Tip
The temperature swing, sometimes called differential or cycle rate, can be
customized for this individual application. For most applications choose a
swing set that is as long as possible without making the occupants
uncomfortable.
Swing Setting Tip
The second stage will turn on at 2x the swing set. The second stage will turn
off when 1x the swing is reached. For example, if the swing set is .5 degrees
for heating and the thermostat is set at 70˚F, the first stage will turn on at
approximately 69.5˚F. The second stage will turn on at 69˚F. The second stage
will turn off at 69.5˚F and the first will turn off at 70.5˚F. If the third
stage is used, it will turn on at 68.5˚F and turn off at approximately
69˚F.
Tech Settings
Specifications
- The display range of temperature … 41˚F to 95˚F (5˚C to 35˚C)
- The control range of temperature…. 44˚F to 90˚F (7˚C to 32˚C)
- Load Rating……………………………………….. 1 amp per terminal, 1.5 amp
- maximum all terminals combined
- Swing (cycle rate or differential) …… The heating is adjustable from 0.2˚ to 2.0˚
- Cooling is adjustable from 0.2˚ to 2.0˚
- Power source …………………………………….18 to 30 VAC, NEC Class II, 50/60 Hz
- for hardwire
- Battery power from 2 AA Alkaline
- batteries
- Operating ambient …………………………. 32˚F to +105˚F (0˚C to +41˚C)
- Operating humidity ………………………… 90% non-condensing maximum
- Dimensions of thermostat …………….. 4.7” W x 4.3” H x 0.9” D
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>