American Standard ACONT103 NP Non Programmable Heat Pump Thermostat Instruction Manual

: May 15, 2024
: American Standard

Table of Contents

ACONT103 NP Non Programmable Heat Pump Thermostat
Safety
Product Specifications
General Information
Installation
THERMOSTAT OVERVIEW
OPERATING FEATURES
Troubleshooting
FAQ
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

ACONT103 NP Non Programmable Heat Pump Thermostat

ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES

IMPORTANT — This Document is customer property and is to remain with this unit.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with the installation. Should further information be desired or should particular problems arise that are not covered sufficiently for the purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.

Safety

WARNING: FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

This information is intended for use by individuals possessing adequate backgrounds of electrical, mechanical, HVAC, and experience. Any attempt to repair an HVAC system may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

LIVE ELECTRICAL COMPONENTS!

During installation, testing, servicing, and troubleshooting of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards.
Do not short out terminals on the gas valve or primary control to test. Short or incorrect wiring will burn out the thermostat and could cause personal injury and/or property damage.

CAUTION: To prevent electrical shock and/or equipment damage, disconnect the electric power to the system at the main fuse or circuit breaker box until installation is complete.
To prevent compressor and/or property damage, if the outdoor temperature is below 55°F, DO NOT operate the cooling system. Do not allow the compressor to run unless the compressor oil heaters have been operational for six hours and the system has not been operational for at least five minutes.

ATTENTION: MERCURY NOTICE
This product does not contain mercury. However, this product may replace a product that contains mercury.
Mercury and products containing mercury must not be discarded in household trash. Do not touch any spilled mercury. Wearing non-absorbent gloves, clean up any spilled mercury, and place in a sealed container. For proper disposal of a product containing mercury or a sealed container of spilled mercury, place it in a suitable shipping container. Refer to www.thermostat- recycle.org for the location to send the product containing mercury.

Product Specifications

SPECIFICATION DESCRIPTION

On every application, 24VAC loads should be reviewed to be sure the indoor unit control power transformer is adequately sized.

NOTE: Use an 18-gauge color-coded thermostat cable for proper wiring. Shielded cable is not typically required.
Keep this wiring at least one foot away from large inductive loads such as Electronic Air Cleaners, motors, line starters, lighting ballasts and large distribution panels. Failure to follow these wiring practices may introduce electrical interference (noise) which can cause erratic system operation.

All unused thermostat wires are to be grounded at indoor unit chassis ground only. Shielded cable may be required if the above wiring guidelines cannot be met. Ground only one end of the shield to the system chassis.

General Information

Overview
The 103 is a non-programmable HP 2H/1C thermostat with a digital display for use with HP applications only.

Contents

1-Thermostat
2-Phillips slotted head mounting screws— 2-Nylon Drywall Anchors
1-Installation Guide / User Guide

Installation

Location

The 103 is designed for installation in climate-controlled living spaces. Place the unit in a central location with good circulation.
For proper temperature sensing, avoid exposing the 103 to heat radiated from lamps, sunlight, fireplaces, or any other radiant heat source.
Avoid locations close to windows, behind doors, or alcoves with poor air circulation, adjoining outside walls, or doors that lead to the outside.
Select a location that prevents the 103 from being directly exposed to air currents from supply registers or ceiling fans.
Mount the Control on a section of the interior wall that does not contain hot or cold water pipes or ductwork.

FIGURE 1. PLACEMENT OF THE 103

Mounting / Installation
Follow these steps to mount the 103 Control to the wall.

Turn OFF all power to heating and cooling equipment.
If an existing thermostat is being replaced:
- a. Record the color and terminal marking of each wire.
- b. Disconnect the wires from the existing thermostat being careful not to allow them to fall back into the wall.
- c. Remove the existing thermostat from the wall.
Pull the cover off the thermostat body. Forcing or prying on the thermostat will cause damage to the unit.
Move the base over the hole in the wall and mark mounting hole locations on the wall using the base as a template. (See Fig. 1)
Move the base out of the way. Drill mounting holes. If you are using existing mounting holes pull thermostat wire bundle through the hole in the thermostat base. Secure the sub-base to the wall. Leveling is for appearance only and will not affect thermostat operation.
Connect wires to the terminal block on the base using an appropriate wiring diagram.
Push excess wire into the wall and plug the hole with a fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.
Two “AAA” alkaline batteries are included in the thermostat at the factory with a battery tag to prevent power drainage.
Remove the battery tag to engage the batteries.

Electric/Gas Jumper (Fan Option)

DIf your emergency or auxiliary system will energize the blower, then jumper W906 on the thermostat base must be cut (see fig. 1).
If your emergency or auxiliary heat system requires that the thermostat energize the fan circuit, do not cut jumper W906.
If you are unsure of your application, contact a qualified service person.

°F or °C Selection
The factory default setting for temperature display is Fahrenheit. If you want the temperature in Celsius, clip jumper W904.

Fast or Slow Cycle Selection
The factory default setting is a fast cycle, which cycles 1st stage at approximately 1.2°F and 2nd stage at 0.75°F. If you prefer a slow cycle, clip jump W905. The 1st stage and 2nd stage would be 1.5°F and 1.2°F respectively.

O/B Terminal Switch Selection
The O/B switch on this thermostat is factory set to “O” position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in COOL. If the thermostat you are replacing or the heat pump being installed with this thermostat requires a “B” terminal, to energize the changeover relay in HEAT, the O/B switch must be moved to the “B” position.

Battery Location
This thermostat does not require batteries to operate. The 2 AAA” alkaline batteries are for the thermostat to remember the configuration menu selections if AC voltage is lost. If the display shows BATT or when AC power is not present, the batteries are low and should be replaced with fresh “AAA” Energizer® alkaline batteries. For best results, replace all batteries with new premium brand alkaline batteries. To replace the batteries, install the batteries along the bottom (see fig. 2). The batteries must be installed with the positive (+) ends to the right.

Wiring Diagrams

THERMOSTAT OVERVIEW

Before you begin using your thermostat, you should be familiar with its features, display, and the location/operation of the thermostat buttons and switches.

Thermostat Operation
The Thermostat Buttons and Switches

(Up arrow) Raises temperature setting.
(Down arrow) Low temperature setting.
FAN switch (ON, AUTO).
SYSTEM switch (COOL, OFF, HEAT, EMER).
The Display
Indicates a malfunction with the system.
The flame icon is displayed when the SYSTEM switch is in the HEAT position. Flame icon ( ) is displayed flashing when 2ndstage heat (Aux or Emergency) is energized. The snowflake icon is displayed (non-flashing) when the SYSTEM switch is in the COOL position. Snowflake and Flame icons are displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly.
EMER is displayed flashing when the system switch is in the EMER position.
Displays current temperature.
Displays currently programmed set temperature (this is blank when the SYSTEM switch is in the OFF position).
“BATT” or is displayed when 2 “AAA” batteries are low and should be replaced.

OPERATING FEATURES

NOTE: To prevent static discharge problems, touch the side of the thermostat to release static build-up before touching any keys.
If at any time during testing your system does not operate properly, contact a qualified service person.

Fan Operation
If your system does not have a G terminal connection, skip to the Heating System.

Turn on the power to the system.
Move the fan switch to the ON position. The blower should begin to operate.
Move the fan switch to the AUTO position. The blower should stop immediately.

CAUTION: Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.

Heating System

Move the SYSTEM switch to the HEAT position. If the auxiliary heating system has a standing pilot, be sure to light it.
Press to adjust the thermostat setting to 1° above room temperature. The heat pump system should begin to operate. However, if the Flame icon ( ) and Snowflake icon are flashing, the compressor lockout feature is operating (see Configuration menu, item 3.)
Adjust the temperature setting to 4° above room temperature. The auxiliary heat system should begin to operate and the Flame icon will be flashing.
Press to adjust the thermostat setting below room temperature. The heating system should stop operating.

Emergency System
EMER bypasses the Heat Pump to use the heat source wired to terminal E on the thermostat. EMER is typically used when compressor operation is not desired, or you prefer back-up heat only.

Move the SYSTEM switch to the EMER position. EMER will flash on the display.
Press to adjust the thermostat setting above room temperature. The Aux heating system will begin to operate. The Flame icon ( ) will display flashing to indicate that the Aux system is operating.
Press to adjust the thermostat below room temperature.
The Aux heating system should stop operating

CAUTION: To prevent compressor and/or property damage, if the outdoor temperature is below 55°F, DO NOT operate the cooling system

Cooling System

Move SYSTEM switch to the COOL position.
Press to adjust the thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation.
Press to adjust temperature setting above room temperature. The cooling system should stop operating.

Configuration Menu

The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements. To enter the configuration menu, with the SYSTEM switch in the OFF position, hold and for at least two seconds. To exit the configuration menu, move the SYSTEM switch from the OFF position.
Configuration Menu
Not available on earlier models
In the run mode, if the setpoint temperature is manually raised by 3°F (2°C) or more above the actual temperature with the TEMPERATURE UP key, and the fast second stage feature is enabled, FA on, the second stage will energize immediately. With FA off, the second stage will not energize until the setpoint temperature is 1°F or more above actual temperature for more than ten minutes.
Select Compressor Lockout CL OFF or ON – Selecting CL ON will cause the thermostat to wait 5 minutes before turning on the compressor if the heating and cooling system loses power. It will also wait 5 minutes minimum between cooling and heating cycles. This is intended to help protect the compressor from short cycling. Some newer compressors already have a time delay built in and do not require this feature. Your compressor manufacturer can tell you if the lockout feature is already present in their system. When the thermostat compressor time delay occurs it will flash the Snowflake and Flame Icons for about five minutes.
Select Temperature Display Adjustment 3 LO to 3 HI –Allows you to adjust the room temperature display up to 3°higher or lower. Your thermostat was accurately calibrated at the factory but you have the option to change the display temperature to match your previous thermostat. The current or adjusted room temperature will be displayed on the left side of the display.
Select Backlit Display – (Not available on earlier models) The display backlight improves display contrast in low lighting conditions. Selecting the backlight ON will keep the light on continuously. Selecting Backlight OFF will keep the light off.

Troubleshooting

Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by pressing and at the same time when the system is switched from “OFF” to “HEAT” position. This also resets the factory defaults. If the thermostat has power, has been reset, and still does not function correctly contact your heating/cooling service person or place of purchase.

Batteries
For optimum performance, we recommend replacing batteries once a year with fresh “AAA” alkaline batteries.

SYMPTOM	POSSIBLE CAUSE	CORRECTIVE ACTION
No Heat/No Cool/No Fan (common problems)	1. Blown fuse or tripped

circuit breaker.

2. Furnace power switch to OFF.

3. Furnace blower compartment door or panel loose or not properly installed.

| Replace fuse or reset breaker. Turn switch to ON.

Replace door panel in proper position to engage

safety interlock or door switch.

No Heat| 1. Pilot light not lit.

2. System Switch not set to HEAT.

3. Loose connection to thermostat or system.

4. Furnace Lock-Out Condition. Heat may also be intermittent.

5. Heating system requires service or thermostat requires replacement.

| Re-light pilot.

Set System Switch to HEAT and raise setpoint above room temperature. Verify thermostat and system wires are securely attached.

Many furnaces have safety devices that shut down when a lock-out condition occurs. If the heat works intermittently contact the furnace manufacturer or local service person for assistance.

Diagnostic: Set System Switch to HEAT and raise the setpoint above room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly.

If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating is

operating correctly.

No Cool| 1. System Switch not set to COOL.

2. Loose connection to thermostat or system.

3. Cooling system requires service or thermostat requires replacement.

| Set System Switch to COOL and lower setpoint below room temperature.

Verify thermostat and system wires are securely attached.

Same procedure as diagnostic for No Heat condition except set the thermostat to COOL and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling.

Heat, Cool or Fan Runs Constantly.| 1. Possible short in wiring.

2. Possible short in thermostat.

3. Possible short in heat/cool/fan system.

4. Fan Switch set to Fan On.

| Check each wire connection to verify they are not shorted or touching together. No bare wire should stick out from under terminal screws. Try resetting the thermostat as described above. If the condition persists the manufacturer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat.
Furnace (Air Conditioning) Cycles Too Fast or Too Slow (narrow or wide temperature swing)| 1. The location of the thermostat and/or the size of the Heating (Cooling) System may be influencing the cycle rate.| Digital thermostats normally provide precise temperature control and may cycle faster than some older mechanical models. A faster cycle rate means the unit turns on and off more frequently but runs for a shorter time so there is no increase in energy use. If you would like to increase the cycle time, clip

Jumper W-905 as mentioned in the instructions for Hydronic Heating Systems. It is not possible to shorten the cycle time. If an acceptable cycle rate is not achieved as received or by clipping W-905 contact a local service person for

additional suggestions.

Thermostat Setting and Thermostat Thermometer Disagree| 1. Thermostat thermometer setting requires adjustment.| Thermostat thermometer can be adjusted +/-3 degrees. See Temperature Display Adjustment in the Operation section
Blank Display and/or Keypad Not Responding| 1. Voltage spike or static discharge,| Use the Reset Operation listed above.

FAQ

(Frequently Asked Questions)

Q: How do I reset the thermostat?
- A: To reset the thermostat, refer to the reset operation instructions in the troubleshooting section of the user manual.
Q: Where is the battery located?
- A: The battery location can be found by referring to Figure 2 in the installation section of the user manual.

About American Standard Heating and Air Conditioning
American Standard has been creating comfortable and affordable living environments for more than a century. For more information, please visit www.americanstandardair.com.

The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

11-HD24D1-1C-EN (09 Sep 2020) Supersedes 11-HD24D1-1B-EN (31 July 2019)
© 2020 American Standard Heating and Air Conditioning

Pub No. 11-HD24D1-1C-EN Part No. 37-7792003 September 2020