HVAC Controls T32-VNP User manual

T32-VNP Atlas Vertical
Non-programmable Thermostat
Installation Manual

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TABLE OF CONTENTS
1
Introduction ............................................................................................................................4
Getting Started........................................................................................................................5
Installing the Thermostat ...................................................................................................6-7
Disassembly ...........................................................................................................6
Thermostat Location ..............................................................................................6
Mounting the Subbase........................................................................................6-7
Terminal Designations............................................................................................8
Setting the System Switches ..................................................................................................9
System Switch Functions......................................................................................................10
Installing the Batteries ..........................................................................................................11
Typical System Wiring Diagrams.....................................................................................12-17
Heat only (Gas Single or Multi-stage)...................................................................12
Heat only (Electric Single or Multi-stage)..............................................................13
Cool only (Single or Multi-stage) ..........................................................................14
Heat / Cool (Gas Single or Multi-stage)................................................................15
2 Heat / 1 Cool or 3 Heat / 2 Cool (Heat Pump) ..................................................16
2 Heat / 1 Cool or 3 Heat / 2 Cool (Dual Fuel)......................................................17

TABLE OF CONTENTS
Installer Setup Menu ......................................................................................................18-25
Entering the Setup Menu.....................................................................................18
Selecting Mode....................................................................................................19
Selecting the Cooling Setpoint Limit....................................................................19
Selecting the Heating Setpoint Limit....................................................................19
Selecting First Stage Differential .........................................................................20
Selecting Second Stage Differential ...................................................................20
Selecting Third Stage Differential .......................................................................20
Selecting Demand Staging or Locked Staging ...................................................20
Internal Sensor Calibration .................................................................................21
Compressor Protection .......................................................................................21
Selecting Low Balance Point Option....................................................................21
Selecting High Balance Point Option...................................................................22
Selecting Fahrenheit or Celsius...........................................................................22
Selecting Audible ON/OFF...................................................................................22
Selecting Fresh Air Ventilation ............................................................................23
Selecting Fresh Air Ventilation Low Temperature Limit.......................................23
Selecting Fresh Air Ventilation High Temperature Limit ......................................23
2

TABLE OF CONTENTS
Remote Sensor Installation ..............................................................................................26-27
T-OTS Outdoor Sensor Installation.......................................................................26
T-S1 Indoor Sensor Installation.............................................................................26
Temperature/Resistance Chart ............................................................................27
Display Functions..................................................................................................................28
Testing.............................................................................................................................29-32
Fan Operation.......................................................................................................29
Conventional Heating...........................................................................................29
Conventional Cooling.......................................................................................29-30
Conventional Heat Pump......................................................................................30
Dual Fuel..............................................................................................................31
Low Balance Point...........................................................................................31-32
High Balance Point................................................................................................32
Fresh Air...........................................................................................................................32-34
Specifications........................................................................................................................35
3

INTRODUCTION
The T32-VNP Atlas is a feature-rich non-programmable thermostat that can be battery
powered or hardwired to the HVAC equipment. Using a commonsense approach to the
installation will ensure this product is installed properly and to the customer’s satisfaction.
Please take time to read and understand this manual so that installation and testing is
performed in an efficient manner.
This manual is to be used in conjunction with the supplied User Manual.
Although great care has been taken in the preparation of this manual, iO HVAC
Controls takes no responsibility for errors or omissions contained herein. It is the
responsibility of the installer to ensure that this thermostat and the equipment
connected to it operate in a safe and efficient manner.
Due to ongoing product improvements, iO HVAC Controls reserves the right to
change the specifications of the T32-VNP Atlas thermostat or its components without
notice.
All rights reserved.
© iO HVAC Controls, LLC 2022.
Intellectual rights apply.
4

GETTING STARTED
As with any HVAC project, careful installation is the key to a successful outcome. Time
taken during the installation process will be rewarded with fewer call-backs.
The steps required to install the T32-VNP Atlas thermostat are as follows.
1. Read and understand this Installation Manual and User Manual.
2. Mount and wire the subbase.
3. Install the batteries.
4. Set the 4 system switches to match the equipment application.
5. Wire optional remote temperature sensor(s).
6. Power the thermostat.
7. Set the Advanced Installer settings.
8. Test the thermostat.
5

INSTALLING THE THERMOSTAT
DISASSEMBLY
There are two release slots located on the bottom of the thermostat. Gently push the flat
blade of a small screwdriver into one slot at a time and pry upward until the catch
disengages. Carefully swing the thermostat upward and away from the subbase. (Figure 1)
THERMOSTAT LOCATION
The thermostat should be installed in a location that
represents the ambient space temperature. Do not
install the thermostat in an area where drafts are
present, near the floor, behind doors or on an external
wall. Avoid placing the thermostat in areas where the air
movement is limited, affected by direct sunlight or other
areas not typical of the temperature in the space.
MOUNTING THE SUBBASE
When mounting the thermostat subbase, be aware that drafts may travel down wall cavities
and enter the back of the thermostat through the control wire hole in the wall. It is important
to seal the hole to prevent any drafts that might affect the internal temperature sensor.
FIGURE 1
6

INSTALLING THE THERMOSTAT
Pull the control wires through the large opening in the
thermostat subbase. Next, level and mount the subbase
on the wall using the supplied anchors and screws.
(Figure 2)
Do not over tighten the mounting screws as the
subbase may warp causing the improper seating of
the thermostat connecting pins to the terminal
blocks.
Use a properly sized screwdriver and back each screw
terminal out (counterclockwise) before landing each
wire to its dedicated terminal. Do not over tighten the
terminal screws. Check to ensure that all wires are
landed correctly and dressed properly to prevent any
shorts. Refer to Typical System Wiring Diagrams in this
manual for proper wiring.
FIGURE 2
UP
Wire Access
Hole
7
C R G W2
O/B Y1 Y2
A
U
X
T T
A
U
X
W1

INSTALLING THE THERMOSTAT
TERMINAL DESIGNATION
C 24 VAC Common
R 24 VAC Hot
G Fan
W1 First Stage Heat/Auxiliary/Emergency Heat
W2/OB Second Stage Heat or Reversing Valve
Y1 First Stage Cool or First Stage Compressor
Y2 Second Stage Cool or Second Stage Compressor
T (2) Outdoor or Indoor Remote Sensor
AUX (2) Relay Contacts for Fresh Air Ventilation Damper
8