Honeywell TH5220D Non-Programmable Digital Thermostat Installation Guide
Installation Guide
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most
problems can be corrected quickly and easily.
Display is blank
•
•
•
•
Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
If thermostat is battery powered, make sure fresh AA alkaline batteries
are correctly installed (see page 10).
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
•
•
Heat: 40° to 90°F (4.5° to 32°C).
Cool: 50° to 99°F (10° to 37°C).
Check temperature range stop settings (Function 27 & 28 on page 12).
Heating system
does not respond
(“Heat On”
•
•
•
•
•
•
•
Check for 24 Vac at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
heating equipment to find the cause of the problem.
appears on
screen)
Check for 24 Vac between the heat terminal (W) and the transformer
common. If 24 Vac is present, the thermostat is functional. Check the
heating equipment to find the cause of the problem.
Check for loose or broken wires between the thermostat and the heating
equipment.
Cooling system
does not respond
(“Cool On”
Check for 24 Vac at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
cooling equipment to find the cause of the problem
appears on
screen)
Check for 24 Vac between the cooling terminal (Y) and the transformer
common. If 24 Vac is present, the thermostat is functional. Check the
cooling system to find the cause of the problem.
Check for loose or broken wires between the thermostat and the cooling
equipment.
Fan does not
turn on in a call
for heat
Check Installer Setup, Function 3 (Fan Control), to make sure the fan
control is properly set to match the type of system (see page 11).
Heat pump
•
Check Installer Setup, Function 2 (Changeover Valve), to make sure it is
properly configured for your system (see page 11).
issues cool air
in heat mode,
or warm air in
cool mode
Heat/cool both
on at same time,
or heat does
not turn off
•
•
Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating/cooling equipment (see page 11).
Check to make sure heating and cooling wires are not shorted together.
16
firealarmresources.com
| General | Details |
|---|---|
| Name | Honeywell TH5220D Non-Programmable Digital Thermostat Installation Guide |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.58 MB |
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