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

SETTING THE SYSTEM SWITCHES
The thermostat contains a set of four system
switches located on the thermostat printed
circuit board. (Figure 3)
The switches are used to match the
thermostat operation and relay outputs with
the HVAC system requirements.
Refer to the system switch functions on the
next page to properly configure the
thermostat.
FIGURE 3
SYSTEM
SWITCHES
1 2 3 4
ON DIP
. . . . . . . . . . . . . . .
9

SYSTEM SWITCH FUNCTIONS
Switch 1 - Equipment Type Switch 1 sets the equipment type. For conventional
heat/cool equipment, set the switch to the OFF
position (factory default). For heat pump equipment set
the switch to the ON position.
Switch 2 - Fan or When Switch 1 is OFF
Reversing Valve For gas heat, set the switch to the OFF position
(factory default). For electric heat, set the switch to the
ON position.
When Switch 1 is ON
For ‘O’ reversing valve, set the switch to the OFF
position. (factory default) For ‘B’ reversing valve, set
the switch to the ON position.
Switch 3 - Equipment Stages Switch 3 sets the number of equipment stages.
OFF = 1 heat / 1 cool gas / electric or 2 heat / 1 cool
heat pump or dual fuel.
ON = 2 heat / 2 cool gas / electric or 3 heat / 2 cool
heat pump or dual fuel.
Switch 4 - Dual Fuel Mode For conventional heat pump equipment, leave
switch 4 in the OFF position (factory default). For
dual fuel equipment, set switch 4 to the ON position.
10

INSTALLING THE BATTERIES
The thermostat comes with two AA batteries. Even if
the thermostat is hardwired, battery backup is
recommended.
However, in the event batteries are not used and the
thermostat loses primary power, all settings are non-
volatile.
The battery access compartment is located on the
front of the thermostat. Simply swing the hinged door
down.
Install the two AA batteries matching the + and -
orientation. Close the door until it clicks shut. When
the batteries are properly installed, the LCD screen
will be visible. (Figure 4)
Mode Fan
- AA +
+ AA -
FIGURE 4
11

TYPICAL SYSTEM WIRING DIAGRAMS
HEAT ONLY (GAS SINGLE OR MULTI-STAGE)
Switch Settings
OFFSwitch 1 = Heat/Cool
Switch 2 = Equipment controls fan on call for heatOFF
Switch 3 = Single Stage = Two StageOFF ON
Switch 4 = Leave OFF OFF
C R G W1 Y1 Y2
24 V
W2
O/B T T
THERMOSTAT
EQUIPMENT
REMOTE
INDOOR OR
OUTDOOR
SENSOR
AUX AUX
FAN
RELAY
HEAT 1
RELAY
HEAT 2
RELAY
LINE
12

TYPICAL SYSTEM WIRING DIAGRAMS
HEAT ONLY (ELECTRIC SINGLE OR MULTI-STAGE)
Switch Settings
OFFSwitch 1 = Heat/Cool
Switch 2 = N Thermostat controls fan on call for heatO
Switch 3 = = Single Stage = Two StageOFF/ON OFF ON
Switch 4 = Leave OFF OFF
C R G W1 Y1 Y2
24 V
W2
O/B T T
THERMOSTAT
EQUIPMENT
REMOTE
INDOOR OR
OUTDOOR
SENSOR
AUX AUX
FAN
RELAY
HEAT 1
RELAY
HEAT 2
RELAY
LINE
13

TYPICAL SYSTEM WIRING DIAGRAMS
COOL ONLY (ELECTRIC SINGLE OR MULTI-STAGE)
Switch Settings
OFFSwitch 1 = Heat/Cool
Switch 2 = N Fan energized on call for coolingO
Switch 3 = = Single Stage = Two StageOFF/ON OFF ON
Switch 4 = Leave OFF OFF
C R G W1 Y1 Y2
24 V
W2
O/B T T
THERMOSTAT
EQUIPMENT
REMOTE
INDOOR OR
OUTDOOR
SENSOR
AUX AUX
FAN
RELAY
COOL1
RELAY
COOL 2
RELAY
LINE
14

TYPICAL SYSTEM WIRING DIAGRAMS
HEAT/COOL (GAS SINGLE OR MULTI-STAGE)
Switch Settings
OFFSwitch 1 = Heat/Cool
Switch 2 = Fan energized on call for coolingOFF
Switch 3 = = Single Stage = Two StageOFF/ON OFF ON
Switch 4 = Leave OFF OFF
C R G W1 Y1 Y2
24 V
W2
O/B T T
THERMOSTAT
EQUIPMENT
REMOTE
INDOOR OR
OUTDOOR
SENSOR
AUX AUX
FAN
RELAY
COOL1
RELAY
COOL 2
RELAY
LINE
HEAT 2
RELAY
HEAT 1
RELAY
15

TYPICAL SYSTEM WIRING DIAGRAMS
2 HEAT/1 COOL OR 3 HEAT/2 COOL (HEAT PUMP)
Switch Settings
Switch 1 = ON Heat Pump
Switch 2 = / - ‘O’ - ‘B’ Reversing ValveOFF ON OFF ON
Switch 3 = = 2 H/1C = 3H/2COFF/ON OFF ON
Switch 4 = Leave OFF OFF
C R G W1 Y1 Y2
24 V
W2
O/B T T
THERMOSTAT
EQUIPMENT
REMOTE
INDOOR OR
OUTDOOR
SENSOR
AUX AUX
FAN
RELAY
COMP 1
RELAY
COMP 2
RELAY
LINE
R VALVE
RELAY
AUX
RELAY
16

TYPICAL SYSTEM WIRING DIAGRAMS
2 HEAT/1 COOL OR 3 HEAT/2 COOL (DUAL FUEL)
Switch Settings
Switch 1 = ON Heat Pump
Switch 2 = / - ‘O’ - ‘B’ Reversing ValveOFF ON OFF ON
Switch 3 = = 2 H/1C = 3H/2COFF/ON OFF ON
Switch 4 = Locks out heat pump when furnace is energized ON
C R G W1 Y1 Y2
24 V
W2
O/B T T
THERMOSTAT
EQUIPMENT
REMOTE
INDOOR OR
OUTDOOR
SENSOR
AUX AUX
FAN
RELAY
COMP 1
RELAY
COMP 2
RELAY
LINE
R VALVE
RELAY
AUX
RELAY
17

INSTALLER SETUP MENU
Mode Fan
NOTE: Making changes in the Installer Setup Menu
can seriously affect the safe operation and function
of the HVAC equipment. If you are unsure about the
functions of the settings it is strongly
recommended that they are left at the factory
default settings.
ENTERING THE MENU
Press and hold the Mode and UP arrow button
simultaneously for five seconds or until the display
shows 15.
Use the UP arrow button and change the number to 21
which is the factory default PIN to enter the menu.
Press the Mode button to enter the installer menu.
Press the Fan button to advance through the menu or
press the Mode button to go back.
To exit the menu, hold the Mode button for 5 seconds.
If no buttons are pressed for 30 seconds the
thermostat will auto exit the menu.
18