ECR International CHB Application Manual page 55

CHB BOILER - DHW RESISTOR HARNESS KIT
FIGURE 2 - CHB Boiler WITH SECONDARY ZONE PUMPS and DHW THERMOSTAT
NOTE: ZONE PUMPS WILL SHUTOFF DURING DHW PRIORITY W/ PRIORITY SWITCH ON
Isolation Relay
FIGURE 3 - Resistor Wire Kit Harness (DHW)
BLU
TO RELAY CONTACTS
(NORMALLY CLOSED)
ORG
Thermostat
24V 120V
W/BLK
YLW
BLU W/YLW
W/BLU
Argo ARM Zone Pump Control
Optional: Connect indirect tank pump
to Priority Zone 1 terminals (if used).
CHB BOILER
KEY 370
KEY 72
REMOVE
JUMPER IF
USED
Wire Nuts
BRN
Low Voltage
DHW
Room Thermostats
Zone Pumps Power Supply
120V/60HZ
KEY
KEY 307
155
RED
WHT
10K
1.8K
BLU
RESISTOR WIRE
BRN
55
Important:
Priority Switch
must be ON.
See step 8.
External
External Supply
System
Pump Connection
Supply Pump
(If used)
POWER SUPPLY PLUG
120V/60HZ
HARNESS
PN 240011270 REV B [03/11/2016]
TERMINAL 7
KEY 155
WHITE WIRE
TERMINAL 8
KEY 155
RED WIRE