COPELAND 026-1739 Programmable Touchscreen Thermostat User Manual
2.4.4 Thermostat – Communication
Terminals
2.4.2 Wiring Guide - Heat Pump Systems
(24VAC)
Table 2-9 - Comm Connections
Modbus Connections
Table 2-7 - Heat Pump Systems
H / 2C System
A-
B+
RS-485 A- Signal
R
24VAC Power Supply
RS-485 B+ Signal
Shorting
Jumper
Rc
24VAC Power Supply for Y1, Y2
24VAC Power Supply Common
*Cool Stage 1, relay output
GND
Reference for DC Signals
C
Y1
2.4.5 Thermostat – Input Terminals
Table 2-10 - Input Terminals
*Cool Stage 2, relay output
Reversing Valve, relay output
Fan Control, relay output
Y2
O/B
G
Thermostat Inputs
IN1
IN2
IN3
IN4
IN5
GND
Remote 10K thermistor (Indoor)
Remote 10K thermistor (Outdoor)
Remote 10K thermistor (Supply)
Remote Humidity sensor (0-5V)
Fan proof input
*Stage 1 and Stage 2 for Heat Pumps are
Compressor Stages (Heat/Cool) and not
only Cool Stages.
NOTE
For systems with only one stage, second stage terminal (Y2)
can be left floating (open).
Reference for DC Signals
2.4.6 Thermostat – Output Terminals
RTU System Output Terminals:
2.4.3 Thermostat – Power Terminals
Table 2-8 - Power Terminals
Table 2-11 - Output Terminals
Thermostat Outputs
Thermostat Power
Y1
Y2
Cool Stage 1, relay output
Cool Stage 2, relay output
Heat Stage 1, relay output
Heat Stage 2, relay output
Fan Control, relay output
Reversing valve, relay output
Economizer, relay output
Dehumidification, relay output
R
Rc
C
24VAC Power Supply
24VAC Power Supply for Y1, Y2
24VAC Power Supply Common
W1
W2
G
O/B
ECO
AUX
5
©2024 Copeland LP.
026-1739 R4 Programmable Touchscreen Thermostat
| General | Details |
|---|---|
| Name | COPELAND 026-1739 Programmable Touchscreen Thermostat User Manual |
| Make | Copeland |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.72 MB |
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