H B X E C O - 0 5 5 0 G e o t h e r m a l C o n t r o l
V e r s i o n 2 . 0 0
Page 20
1) Single stage heat pump with backup boiler. This system uses a dual tank for heating and
cooling
NOTE:
The THM-0200 Thermostat can be replaced with the HBX WiFi Zoning
System. See ZON-0550 Installation Manual at hbxcontrols.com/resources.php
WIRING DIAGRAMS
C
R
L
N
120 V AC
24 V AC
Cold
Tank
Hot
Tank
5 A
RL
1
RL
15
14
1
5 A
RL
2
RL
17
16
2
Central Processing Unit
ECO-0550
HBX
GR
120
13
N
L
12
11
1
1
TM
3
2
8
TM TM
7
9
10
BL
1
BL
6
5
1
2A
DO NOT
CONNECT
POWER HERE
1
2
DS
1
2
2
DS DS
1
3
4
DO NOT
CONNECT
POWER HERE
DS
5 A
RL
2
RL
19
18
2
Outdoor
THM-0200
HBX
RL
2
RL
3
2
2
2
24V AC
10
9
2
TH
2
TH
8
7
3
Thermostat
RL
1
RL
5
4
1
2 A
DO NOT CONNECT
POWER HERE
TH
1
6
RL
1
2 A
1
HP 1
Backup Rev Valves
System
Pump
24VAC
MAX
Hot Tank
Notes:
This is not an engineered drawing and does not necessarily include all the components for an entire system. It is intended
as a representative sample of how the control may be wired for a sample application. It is the responsibility of the installer
to seek professional advice and/or install the the system to meet all necessary codes for the jurisdiction of the actual
installation.
Title
ECO-0550 CONTROLLING 1 HEAT PUMP WITH DUAL TANKS AND BACKUP BOILER
Heating Load
Cooling Load
Cold Tank
Cold Tank
Sensor
Hot Tank
Sensor
Heat Pump 1
120 VAC
THM-0200
To Ground Loop
From Ground Loop
ECO-0550
Outdoor
Sensor
Hot System
Pump
Cold System
Pump
Pump Relay
HBX
REL-2120
Backup
Boiler