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
© HBX Control Systems Inc. 2018
Page 21
2) Three stage heat pump. This system uses a single tank for heating and cooling
C
R
L
N
120 V AC
24 V AC
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
24V AC
MAX
DS
5 A
RL
2
RL
19
18
2
HP 1
HP 3
Rev Valves
HP 2
Tank
Sensor
4 Wire Thermostat
Y
R C
W
Outdoor
Sensor
NOTE:
The THM-0200 Thermostat can
be replaced with the HBX WiFi Zoning
System. See ZON-0550 Installation Manual
at hbxcontrols.com/resources.php
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 3 HEAT PUMPS WITH A SINGLE TANK
Tank
Heat Pump 1
System
Pump
Heat Load
Cool Load
Tank
Sensor
120 VAC
THM-0200
Heat Pump 2
To Ground Loop
From Ground Loop
To Ground Loop
From Ground Loop
Outdoor
Sensor
Heat Pump 3
To Ground Loop
From Ground Loop
ECO-0550