EcoSmart ES50HVP Service Manual - Control
4 |
P a g e
CONTROL
ASSEMBLY
LEGEND
Refer to Figure 1 (bolded numbers on left side are referred to in troubleshooting)
1
120VAC 60Hz single phase power input
2
120VAC 250W Max. pump output from relay
3
Thermostat connection: R, G, Y2, Y, W, interrupted C
4
0-10VDC output voltage for variable speed pump
5
Auxiliary 24VAC accessory output
– active when heating
6
Dry contacts to bring on heat source
7
Flow switch input for domestic hot water priority
8
Air in/out temperature sensors
9
Fuse 3A 32V ATO type
10
Pressure sensor
11
Heat/cool CFM DIP switches
12
Options DIP switches
13
Door switch
14
Pump relay
15
24VAC output from transformer: Blue = R, Yellow = C*
* For smart/WiFi thermostats requiring constant power such as Nest, Ecobee,
CÔR etc., use C connection at yellow wire using a double male/female adapter
0.25”. Do not connect thermostat to C terminal in 3 above – this is only active
when the A/C condenser is on
16
24VAC 40VA transformer
17
Software version identifier
18
Building automation system input
19
Variable speed output to EC motor
20
Diagnostic connector