White Rodgers 1F98EZ-1421 Emerson Blue Easy Install Universal 4-Wire Thermostat Solution 설치 설명서

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Control can be mounted on wall or equipment. Control has 
four mounting holes. Wall anchors and screws are provided 
for mounting on drywall. Drill 3/16 hole for drywall mounting.
If mounting on equipment 

Do Not Mount inside HVAC 

equipment. Only mount on outside of HVAC equipment.

Refer to equipment manufacturers’ instructions for specific 
system wiring information. After wiring, see CONFIGURATION 
section for proper thermostat configuration.
Connect wires as appropriate for HVAC systems (see wiring 
diagrams). To power control, connect the 24 V system hot to 
R terminal and common to C on left side of control labelled 
“Power”. On initial power up the 7 segment LED on the 

1)  Pull the thermostat/interface off the base. Forcing or 

prying on the thermostat will cause damage to the unit. 

2)  Place base over hole in wall and mark mounting hole 

locations on wall using base as a template.

3)  Move base out of the way. Drill mounting holes. If you are 

using existing mounting holes and the holes drilled are 
too large and do not allow you to tighten base snugly, use 
plastic screw anchors to secure the base.

4)  Fasten base snugly to wall using mounting holes and two 

mounting screws. Leveling is for appearance only and will 
not affect thermostat operation. 

5)  Connect wires to terminal  block on base (see Figure 1). 
6)  Push excess wire into wall and plug hole with a fire 

resistant material (such as fiberglass insulation) to prevent 
drafts from affecting thermostat operation.

7)  Carefully line the thermostat up with the base and snap 

into place.

 R ......................................... 24 VAC Transformer 
 RC ....................................... 24 VAC Cooling Transformer
 RH ....................................... 24 VAC Heating Transformer
 C ......................................... 24 V Transformer Common
 W/E ..................................... Heating Stage 1
                                               HP Aux/Em Heat Stage 1
 W2 ....................................... Heating Stage 2
                                               HP Aux/Em Heat Stage 2 
 Y .......................................... Compressor Stage 1
 Y2 ........................................ Compressor Stage 2
G .......................................... Fan Relay
L Terminal ............................ System Monitor Compatible
                                               with Comfort Alert Diagnostics
O/B Terminal ........................ Changeover Relay Heat Pump

DHM .................................... Dehumidification Relay / Connection
DHM2 .................................. Dehumidification Relay / Connection
HM ....................................... Humidification Relay / Connection
HM2 ..................................... Humidification Relay / Connection
R .......................................... 24 VAC to Interface
1........................................... Data to/from Interface
2........................................... Data to/from Interface
C .......................................... 24 VAC Common to Interface
RJ11 .................................... Field configuration hook-up with RJ11
                                              equipped configuration tool
+ .......................................... Voltage to Outdoor Sensor
S .......................................... Outdoor Sensor Temperature Signal
- ........................................... Voltage to Outdoor Sensor

control  will display E (for communication error) until interface 
is connected. With power supplied to control, it is normal for 
the green system LED to flash periodically.  
With interface connected, the 7 segment LED will display 
C to indicate the two devices have initiated communication. 
C will disappear after approximately 30 seconds when 
communication is established.

R

R

1

2

C

1

2

40C01Control

1F98 Thermostat

C