ECR International CHB Application Manual page 16

FIGURE 10 - CHB Boiler WITH MULTIPLE ZONE PUMPS WITH Indirect Tank (DHW)
CHB - WIRING DIAGRAM
Argo ARM Zone Pump Control
CHB BOILER
KEY 370
KEY 72
Remove
Jumper
if used
INDIRECT TANK
DHW SENSOR
Low Volt
Room Thermostats
T T T
G G G
Zone Pumps
System Pump
Connection
L1
GND
KEY 307
KEY 155
NEU
120 VAC
s
16
Set Priority Switch
"OFF"
High Voltage Power
Supply
G
120V/60Hz
CH System Pump
(If used)
WITH DHW
INDIRECT TANK
POWER SUPPLY CORD
120V/60HZ
PN 240011074 REV C, [11/01/2017]