Honeywell TH9421C1004 Touch-screen Programmable Thermostat
Thermostat can be mounted on 2" x 4" J box or on drywall or plaster using included wall anchors (drill 3/16" holes for drywall; 7/32" holes for plaster). Connect 1, 2, 3 terminals on thermostat to 1, 2, 3 terminals on EIM or Zone Panel; see EIM or Zone Panel Installation Guide for wiring diagrams.
Honeywell TH9421C1004 Installation
Thermostat can be mounted on 2" x 4" J box or on drywall or plaster using included wall anchors (drill 3/16" holes for drywall; 7/32" holes for plaster). Connect 1, 2, 3 terminals on thermostat to 1, 2, 3 terminals on EIM or Zone Panel; see EIM or Zone Panel Installation Guide for wiring diagrams.
| Setup function | Settings & options (factory default in bold) | ||
|
0110 |
Zone number |
0 1–9 |
Not zoned Zone number |
|
0120 |
Year |
20 |
(2000-2099) |
|
|
(first two digits) |
21 |
(2100-2178) |
|
0130 |
Year (second two digits) |
06 |
(2006) [Other options: 00-99] |
|
0140 |
Month |
6 |
[Other options: 1-12] |
|
0150 |
Date |
15 |
[Other options: 1-31] |
|
0160 |
Schedule format |
4 |
7-day programming |
|
|
|
0 |
Non-programmable |
|
0165 |
Restore Energy |
0 |
No |
|
|
Star schedule |
1 |
Yes |
|
0172 |
System type |
1 |
Conventional |
|
|
|
2 |
Heat pump |
|
|
|
3 E |
Heat only (no fan) Auto Discover ** |
|
0174 |
Cooling compressor stages |
1 |
1 stage of cool [Other options: 0 or 2 stages, or E] |
|
0176 |
Heat or Heat Pump Aux stages |
1 |
1 stage of heat [Other options: 0, 2 or 3 stages, or E] |
|
0180 |
Fan control |
0 |
Gas/Oil heat (equipment controls heating fan) |
|
|
(conventional heat) |
1 |
Electric furnace (thermostat controls heating fan) |
|
|
|
2 E |
Equipment controls stage 1, thermostat controls stage 2+ Auto Discover ** |
|
0190 |
Changeover valve |
0 |
O/B terminal controls valve in cooling |
|
|
(O/B terminal) |
1 |
O/B terminal controls valve in heating |
|
0200 |
Backup heat (Aux & EmHeat) |
E 0 |
Auto Discover ** Electric backup heat |
|
|
|
1 |
Fossil fuel backup heat |
|
0210 |
External fossil |
1 |
External fossil fuel kit controls backup heat |
|
|
fuel kit |
0 |
Thermostat controls backup heat (outdoor sensor required) |
|
0220 |
Stage 1 compressor 1cycle rate |
E |
Auto Discover ** [Other options: 1 to CPH] |
|
0230 |
Stage 2 compressor cycle rate |
E |
Auto Discover ** [Other options: 1 to 6 CPH] |
|
0240 |
Stage 1 heat cycle rate (CPH= cycles per hour) |
E |
Auto Discover ** [Other options: 1 to 12 CPH] |
|
0250 |
Stage 2 stage heat cycle rate (CPH) |
E |
Auto Discover ** [Other options: 1 to 12 CPH] |
|
0260 |
Stage 3 heat cycle rate (CPH) |
E |
Auto Discover ** [Other options: 1 to 12 CPH] |
|
0280 |
Backlight |
0 |
Backlight on for approx. 45 seconds after keypress |
|
|
|
1 |
Backlight always on low intensity, full bright after keypress |
|
0300 |
Manual/Auto |
0 |
Manual (User options: Heat/Cool/Off) |
|
|
changeover |
1 |
Automatic (User options: Heat/Cool/Auto/Off) |
|
|
|
|
(System selects heat/cool based on indoor temp.) |
|
0310 |
Auto changeover deadband |
3 |
Heat/cool settings 3°F apart (1.5°C) [Other options: 2-9 (2°F to 9°F/1°C to 5°C)] |
|
0320 |
Temperature display |
0 |
Fahrenheit |
|
|
|
1 |
Celsius |
|
0330 |
Daylight savings |
2
1 |
Auto-change to daylight savings time (2007 and beyond, for areas that use the new 2007 DST calendar) Auto-change to daylight savings time (through 2006, and for areas |
|
|
|
0 |
that do not use the new 2007 DST calendar) Daylight savings time is turned off |
|
0340 |
Indoor temp. |
0 |
Display temp. at thermostat location only |
|
|
sensor |
1 |
Display temp. at indoor sensor location(s) |
|
|
|
2 |
Average between thermostat & sensor location(s) |
|
0342 |
Outdoor temp. sensor |
E 0 |
Auto Discover ** None |
|
|
|
1 |
Remote sensor |
|
0345 |
Dual fuel heat |
1 |
Balance point plus 2°F droop ** |
|
|
pump control |
0 |
Balance point only ** |
|
|
|
2 |
Balance point/Aux Heat Lockout plus 2°F droop ** |
|
0346 |
Dual fuel heat |
60 |
60 minutes ** |
|
|
pump upstage to furnace timer |
0 |
Off [Other options: 30, 45 or 75 minutes] |
|
0350 |
Heat pump compressor lockout |
0 |
No compressor lockout ** [Other options: 5 to 60°F (-15°C to 15.5°C)] |
|
0360 |
Heat pump auxiliary lockout |
0 |
No heat pump auxiliary lockout ** [Other options: 5 to 65°F (-15°C to 18.5°C)] |
|
0365 |
Discharge temp. sensor |
E 0 |
Auto Discover ** No |
|
|
|
1 |
Yes |
|
0370 |
Indoor humidity |
1 |
Internal sensor in thermostat |
|
|
sensor |
0 E |
Sensors disabled Auto Discover ** |
See The PDF Manual...
Error codes
|
027 |
Faulty thermostat (must be replaced) |
|
035 |
Duplicate thermostat zone detected |
|
036 |
Duplicate UV timer |
|
037 |
Duplicate filter timer |
|
038 |
Duplicate humidifier pad timer |
|
039 |
Duplicate indoor humidity sensor |
|
040 |
Compressor should be running but it is not |
|
050 |
Duplicate outdoor temperature sensor |
|
052 |
Faulty post-coil air discharge sensor |
|
053 |
Faulty outdoor temperature sensor |
|
054 |
Faulty indoor humidity sensor |
|
089 |
Heating/cooling equipment is missing |
|
090 |
Data interface is continuously busy |
|
091 |
Thermostat is not receiving data from other equipment |
|
118 |
Faulty discharge air temperature sensor |
|
119 |
Faulty temperature sensor |
|
121 |
Duplicate post-coil air discharge sensor |
Accessories
Please contact your distributor to order replacement parts.
| Outdoor temperature sensor | Part number C7089U1006 |
| Remote indoor temperature sensor | Part number C7189U1005 |
| Discharge air temp. sensor | Part number C7835A1009 |
| Energy recovery ventilator | Part number ER200B2006 |
| Heat recovery ventilator | Part number HR200B1005 |
| Fresh air damper | Part number EARD6 |
| 2-Channel Telephone access module | Part number W8735D1009 |
| 4-Channel Telephone access module | Part number W8735D1017 |
| Bypass flow-through or steam humidifier | Part number HE265A1007 |
| UV air purifier | Part number UV100E1043 |
| Cover plate | Part number 32003796-001 |
(Use to cover marks left by old thermostats.)
*Contact your dealer or Honeywell rep for a complete list of compatible products.
Special function
- Auto Discover: Setup functions set to “E” (Auto Discover) will be configured automatically, based on information sent from connected equipment. When using Auto Discover, verify that the discovered value is correct. If it is not, the equipment is not communicating the information, and you must change settings manually.
- Adaptive Intelligent Recovery (Setup Function 0530): Allows the thermostat to “learn” how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached at the scheduled time.
- Compressor Protection (Setup Function 0580): Forces the compressor to wait a few minutes before restarting, to prevent damage. During this time, the message “Wait” flashes on the display.
- Southern Away Dehumidification Control (Setup Functions 0390-0394): This feature is useful for homes in southern climates. It allows humidity control when the the home is unoccupied for long periods during the hot/humid season. You can control temperature (Function 0393) and dehumidification (Function 0394) while away. You can control humidity with a dehumidifier or a cooling system (Function 0379). If a cooling system is used, humidity is controlled by cooling indoor air to the Low Limit Temperature (Function 0392). When the desired humidity is reached, the system will maintain the temperature you select in Function 0393.
- Heat Pump Control — Electric Backup (Setup Functions 0350-0360): If an outdoor temperature sensor is installed, select a compressor lockout temperature (Function 0350). Below this temperature, only electric heat operates. Also select an auxiliary lockout temperature (Function 0360). Above this temperature, only the compressor operates. Between these temperatures, both heat sources operate.
- Heat Pump Control — Fossil Fuel Backup (Setup Function 0345):
- Option 0 (Balance point only): If outdoor temperature is above balance point (Function 0350), only the compressor operates. Below this temperature, only backup heat operates.
- Option 1 (Balance point + 2°F droop): As above, but backup heat is activated if room temperature drops by 2°F (compressor is deactivated).
- Option 2: (Balance point/Aux Heat +2°F droop): Compressor works only above auxiliary lockout temperature, backup heat works only below balance point, 2°F droop between temperatures. If temperature is not reached in a reasonable time, set the upstage timer (Function 0346). After the designated time, the compressor will be deactivated and the system will switch to backup heat.
- Ventilation Control (Setup Functions 0400-0406): If the system includes a self-powered ventilation unit (Function 0400), the home can be ventilated on demand, or ventilated automatically if high humidity is detected while in heating mode (Function 0406).
Readmore and Download Honeywell Home TH9421C1004 Installation Guide
| Title | : Honeywell Home TH9421C1004 Installation Guide |
| Format | |
| Pages | : 72 Pages |
| Language | : English |
| File Size | : 7.5 MB |
| Model | : TH9421C1004 |
