ECR Argo ARH-1 Installation Manual And Operating Instructions page 13

WIRING DIAGRAM APPLICATIONS
(2 AIR HANDLERS AND 1 PRIORITY ZONE)
Note: Zone 1 R & C terminals must
be connected and energized for
board to function.
* - IF USED. IF NOT,
JUMPER MUST BE INSTALLED.
ARH-3 THREE ZONE HYDRO-AIR
CONTROL INSTRUCTION
13
Note:
Connection
for 2 Speed
Fan (Remove
Jumper)