LUTRON 653 Right Thermostat Control Datasheet
Application Note #653
Identifying HVAC Equipment (continued)
Find the Existing Thermostats and Check the Connections Used
This section is applicable in a remodel/retrofit application. Remove the thermostat from the wall to expose the wire
connections on the rear of the thermostat. Take note of the connections being made and then reference those connections
in the table below. The table contains the common terminal designations for HVAC controls and the equivalent Lutron
thermostat control connections. For more information about specific terminology, refer to Glossary of Key Terms.
Terminal Description
Terminal
SMC55 Controller
L-HWLV2-WIFI
Thermostat power or heat only transformer
R or R
R
R
H
H
Thermostat power or cool only transformer
R
R
R
C
C
C
Single or first stage cooling
Second stage cooling
Single or first stage heating
Second stage heating
Fan relay
Y
Y
Y
1
5
Y
Y
Y
2
2
2
W
W
W
1
5
W
W
W
2
2
2
G
G
G
n/a
Fan relay [for Fan Coil Units (FCUs) only]
Common1
G , G , G
G , G , G
3
1
2
3
1
2
C
C
C
Changeover/reversing valve2, 3
Emergency heat
O/B
E
O/B5
O/B
AUX/E
AUX/E
R
R
, AUX5
, AUX5
AUX
AUX
Auxiliary heat
X or AUX
Blue wire
S or Outdoor 1 (conventional)
Remote/outdoor temperature sensor
Remote/outdoor temperature sensor4
S
1
1
Black wire (common)
Blue/red wire
S or Outdoor 2 (FCU changeover)
Black wire (common)
S
2
1
Universal relay for humidification/ dehumidification/ ventilation
U
n/a
U
1
1
1 Common wire connection is necessary for every application.
2 “O” is used for most heat pumps. It provides power for changeover/reversing valve in cooling mode.
3 “B” is used in Rheem or Ruud systems. It provides power for changeover/reversing valve in heating mode.
4 Sensor connection requires both terminals. It is not a single terminal connection.
5 Included with SMC55-RESI version 7302 or newer.
Continued on next page...
6
Customer Assistance — 1.844.LUTRON1
| General | Details |
|---|---|
| Name | LUTRON 653 Right Thermostat Control Datasheet |
| Make | Lutron |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.5 MB |
(1 votes, average: 5.00 out of 5)
Loading...
BOSCH 6721807275 Smart Radiator Thermostat Installation Guide
ELKO EKO50107, EKO50108 Matter Thermostat Installation Guide
FIBARO FGBHT-001 Radiator Thermostat User Guide
expert4house BHT-006 Series Thermostat Instruction Manual
Honeywell PRO 1000 Series Non-Programmable Thermostat Instruction Manual
SALUS TS600 Remote-Only Thermostat User Guide
BEOK CONTROLS WiFI-EP WiFi Thermostat User Guide
BEOK CONTROLS TFT-LCD Heating Thermostat Instruction Manual
nVent RAYCHEM GM-TA Thermostat Instruction Manual
Vine Smart Wi-Fi Thermostat with Nightlight TJ-225 User Guide