ECR International CHB Application Manual page 11

D. Multi-Zoned Valve System:
1.
If only Central Heating is required on multi-zone valve
application - use factory supplied resistors on Key 155
terminal strip:
• Boiler call for heat contacts (key 72) are wired to
Argo Zone control X-X terminals.
• Zone thermostats and valves are wired to Argo
Control.
• See wiring Figure 7.
2.
If DHW tank is applied to Multi-Zone Valve application -
use Indirect Tank Sensor:
• Attach sensor to boiler control (Key 155) terminals 7 & 8.
Boiler control will set priority for DHW operation.
• Boiler call for heat contacts (Key 72) are wired to Argo
Zone control X-X Terminals.
• Zone thermostats and valves are wired to Argo
Control.
• See wiring Figure 8.
NOTICE
Set Argo Priority switch to OFF position.
CHB - WIRING DIAGRAM
Important:
• Before connecting to Key 72 terminals,
remove jumper on terminal block. (Key 72)
• Before connecting optional Indirect Tank
Sensor, remove two (2) resistors. ( Key 155)
• Before connecting Low Water Cutoff remove
jumper on terminal block. (Key 370)
11
NOTICE
PN 240011074 REV C, [11/01/2017]