EMERSON 1F83H-21NP Heat Pump Thermostat Instruction Manual

: June 7, 2024
: Emerson

Table of Contents

SPECIFICATIONS
THERMOSTAT INSTALLATION
TEST EQUIPMENT
USING THE THERMOSTAT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

1F83H-21NP (Non-Programmable)
Installation and Operating Instructions
Heat Pump Thermostat
Battery Powered or Hardwired with Common

EMERSON 1F83H-21NP Heat Pump

View all EMERSON thermostat manual

Thermostat Applications	Maximum Stages Heat/ Cool

Single Stage Compressor, Heat Pump Systems (air source or geothermal) – 1 Stage Aux/Emergency Heat| 2/1

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.
Refer to www.thermostat-recycle.org for information on disposing of products containing mercury.

SPECIFICATIONS

Electrical Rating:

PART NO. 37-7569002
Replaces 37-7569001
2042
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THERMOSTAT INSTALLATION

WIRING
Refer to equipment manufacturer’s instructions for specific system wiring information. After wiring, see INSTALLER MENU for proper thermostat configuration. The wiring table shown is for typical systems and describes the thermostat terminal functions.

Terminal Designations	Terminal Function

R

| Power (24V)

O/B

| Changeover Terminal-Energized in Cool (O) or Heat (B) for Heat Pump or Damper Systems

Y

| Heat and Cool Mode 1st Stage Compressor

G

| Fan Relay

E*

| Auxiliary only Heat Mode (Emergency Heat)

C

| Common wire for 24V (optional with batteries)

L

| Heat Pump malfunction / Diagnostic terminal (input signal requires common)

W2*

| Heat Mode – 2nd stage

*Cut W2/E jumper when separate heat sources are used for W2 and E.
IMPORTANT: For Dual Fuel Heat Pump applications, be sure to turn on the Duel Fuel Logic option (found in the Installer’s Menu)

EMERSON 1F83H-21NP Heat Pump part Precautions

Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes and ordinances.
This control is a precision instrument and should be handled carefully. Rough handling or distorting components could cause the control to malfunction.

WARNING!
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 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 electrical power to the system at the main fuse or circuit breaker box until installation is complete.

Battery Location
Premium AA alkaline batteries are required when C-wire is not available. When C-wire is available, the batteries provide a backup source of power (this will maintain the clock in the event of a power outage).

EMERSON 1F83H-21NP Heat Pump battery

W2/E Jumper Wire
This thermostat electrically connects the W2 and E terminals so that you do not need to do this with a jumper wire. If your system has separate W2 and E wires, clip the W2/E jumper located on the back of the thermostat. This will isolate both terminals so they can be used independently.
O/B Terminal Switch
The O/B switch on this thermostat is factory set to the O position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in Cool. If the heat pump is installed requires a B terminal to energize the changeover relay in Heat , the O/B switch must be moved to the B position.

INSTALLER MENU
To prevent changes that may affect system performance, this thermostat has an INSTALLER’S MENU and a USER MENU. The INSTALLER’S MENU provides access to every option, while the USER MENU provides access to items that will not affect system performance. To access the INSTALLER’S MENU press the Menu button for 8 seconds. The display will show item 30 in the table below. Use Next to navigate through menu items. Press or to change a menu setting.

Installer’s Menu # (Hold Menu 8 Seconds)| Description| Default Setting (flashing icons)| Settings (Press or )
---|---|---|---
30| Heat Cycle Rate (how often the heat will turn on)| MEd| SLO – slow
MEd – medium
FAS – fast
32| Aux Cycle Rate (how often the auxiliary heat will turn on)| MEd| SLO – slow
MEd – medium
FAS – fast
35| Cool Cycle Rate (how often the cooling will turn on)| MEd| SLO – slow
MEd – medium
FAS – fast
50| Compressor Lockout
(protects the compressor
from short cycling)| OFF| On – 5 minute delay
OFF – no delay
60| Duel Fuel Logic (turn On when using gas as the auxiliary heat source)| OFF| On-gas auxiliary heat
OFF- electric auxiliary heat
65| Maximum Heat Limit
(maximum set point for heat mode| 99| 47 to 99
66| Minimum Cool Limit
(minimum set point for cool mode)| 45| 45 to 97
79| Fahrenheit or Celsius| °F| °F – Fahrenheit
°C – Celsius
81| Temperature Display Adjustment
(adjust the displayed “Room
Temperature”)
| 0| -5 to +5
83| Continuous Display Light (keep the backlight always on – “C” wire required)| OFF| On – always on
OFF – momentarily
99| Keypad Lock (prevent unwanted changes to the thermostat)| OFF| On – disable buttons
OFF – all buttons are active

TEST EQUIPMENT

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

Move fan switch to On position. The blower should begin to operate.
Move fan switch to the Auto position. The blower should stop immediately.

Heating System

Move System Switch to Heat position. If the auxiliary heating system has a standing pilot, be sure to light it.
Press to adjust thermostat setting to 1° above room temperature. The heat pump the system should begin to operate and the thermostat will indicate Heat On.
Press to adjust thermostat setting to 3° above room temperature. The auxiliary heat should begin to operate and the thermostat will indicate Heat On Auxiliary.
Press to adjust the thermostat setting 1° below room temperature. The heating system should stop operating and the thermostat should indicate Heat.

Auxiliary System

Move System Switch to Aux position. If the auxiliary heating system has a standing pilot, be sure to light it.
Press to adjust thermostat setting to 1° above room temperature. The auxiliary heating system should begin to operate and the thermostat will indicate Heat On Auxiliary.
Press to adjust the thermostat setting 1° below room temperature. The auxiliary heating system should stop operating and the thermostat should indicate Heat Auxiliary.

Cooling System

Move System Switch to Cool position.
Press to adjust the thermostat setting 1° below room temperature. The blower should come on immediately at high speed, followed by cold air circulation. The thermostat will indicate Cool On. There can be up to a 5-minute delay. (see INSTALLER MENU, item 50)
Press to adjust thermostat setting to 1° above room temperature. The cooling system should stop operating and the thermostat will indicate Cool.

Note: If Starting Soon is shown on the display, the compressor lockout feature is operating
There will be up to a 5-minute delay before the compressor turns on. (see INSTALLER MENU, item 50)

CAUTION!
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
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.

USING THE THERMOSTAT

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 BUTTONS AND SWITCHES	THE DISPLAY
1.) Fan Switch	7.) Thermostat is protecting the equipment from short cycling

(5-minute delay)
2.) System Switch| 8.) Indicates that the system is running in cool, heat, or auxiliary mode (The auxiliary will run in Heat mode when the heat the pump cannot maintain the set temperature.) Backlight Button (located on the top
3.) Backlight Button (located on the top of the thermostat| 9.) Battery status indicator
4.) Raises Temperature Setting| 10.) Low battery indicator
5.) Access Menu Options| 11.) Temperature setpoint
6.) Lowers Temperature Setting| 12.) Appears when the keypad is locked (to prevent unwanted changes)
| 13.) Next (Menu button) is used to advance through the menu
| 14.) SEE TROUBLESHOOTING

EMERSON 1F83H-21NP Heat Pump NEW

Whenever “ Replace” appears in the display, new premium brand AA alkaline batteries should be installed. If the house will be unoccupied for an extended period and either “ ” or “ Replace ” is displayed, install new batteries before leaving.

USER MENU
To customize thermostat settings, press and hold the Menu button for ½ second from
the home screen. Use Next to advance through menu items. Press or to change the setting.

User’s Menu #
(Press Menu button and release)| Description| Default Setting (flashing icons)| Settings (Press or )
---|---|---|---
01| Continuous Display Light
(keep the backlight always on –
“C” wire required)| OFF| On – always on
OFF – momentarily

Keypad Lockout – To prevent unwanted changes, the buttons can be disabled.
To turn this feature On, press and hold and the Menu button until the icon appears (this can also be turned on in the menu). To turn Off, press and hold and the Menu button for 3 seconds.

Symptom

|

Possible Cause

|

Corrective Action

---|---|---
No Heat/ No Cool/ No Fan
(common problem)| 1.) Blown fuse or tripped circuit breaker
2.) Furnace power switch to OFF
3.) Furnace blower compartment door panel loose or not properly installed
4.) Lose connection to thermostat or system| 1.) Replace fuse or reset the breaker
2.) Turn the switch to ON
3.) Replace the door panel in the proper position to engage the safety interlock or door switch
4.) Tighten Connections
No Heat| 1.) System Switch not set to Heat
2.) Lose connection to thermostat or system
3.) Heating System requires service or thermostat requires replacement| Verify thermostat and system wires are securely attached.
Diagnostic: Set System Switch to Heat and raise the setpoint above room temperature. Within five minutes the thermostat should make a soft click sound and “Heat On” should appear on display. This sound indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed below. 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 system is operating correctly.
No Cool| 1.) System Switch not set to Cool
2.) Lose connection to the thermostat or system
3.) Cooling System requires service or thermostat requires replacement| Verify thermostat and system wires are securely attached.
Diagnostic: Set System Switch to Cool and lower setpoint below room temperature. Same procedures 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 if the compressor lock-out option is selected in the installer menu. (see INSTALLER MENU, item 50)
Heat, Cool, or Fan Runs Constantly| Possible short in wiring, thermostat, heat, cool or fan system| Check each wire connection to verify they are not shorted or touching other wires. Try resetting the thermostat. If the condition persists contact your HVAC service person.
Thermostat Display & Thermometer Disagree| Thermostat display requires adjustment| The display can be adjusted +/-5°. See User Menu item 04
Furnace (Air Conditioner) Cycles Too Fast or Slow (narrow or wide temperature swing)| The location of the thermostat and/ or the size of the Heating System may be influencing the cycle rate| Digital thermostats provide precise control and cycle faster than older mechanical models. The system turns on and off more frequently but runs for a shorter time. If you would like to increase cycle time, choose SLO for the slow cycle in the Installer menu. (Reference menu items 30 & 35) If an acceptable cycle rate is not achieved, contact your HVAC service person.
The “Call for Service” icon appears on the display| 1.) Heating system is not able to heat the space to within 10 degrees of the setpoint within 2 hours
2.) Cooling system is not able to cool the space to within 10 degrees of the setpoint within 2 hours
3.) If “–” is displayed for the Room Temperature, a replacement thermostat is needed
4.) None of the buttons operate on the thermostat
5.) If “Call for Service” is flashing, compressor self-diagnostic is detecting an issue with the outdoor unit| 1.) See corrective action for “No Heat”
2.) See corrective action for “No Cool”
3.) Replace the thermostat
4.) Make sure keypad lockout is not turned on (denoted by the icon)
5.) Contact a service person to verify the equipment is operating correctly

Resetting the Thermostat or Thermostat Settings
If the thermostat has good batteries, but has a blank display or does not respond to keypresses, the thermostat should be reset by removing the batteries for 2 minutes. This reset will not change the menu settings or program. If the condition persists after reinstalling the batteries, replace the thermostat.
To conveniently reset only the schedule and user settings back to factory defaults, press the Menu and Backlight buttons at the same time and hold until the display goes blank and resets.
WARNING: This product contains a chemical known to the state of California to cause cancer and birth defects and other reproductive harm.

HOMEOWNER HELPLINE: 1-800-284-2925

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