Install Instructions
9
SEQUENCE OF OPERATION
When A Zone Calls For Heat (Circuit Is Closed)
1. The isolated switch coil is energized and the contact closes.
2. X-X switch is closed. (X1-X1 and X2-X2 switches closed on
ARM-2P) and the X-X indicator light turns on.
3. Controller relay closed and the ZC-ZR indicator light turns on.
(ARM-2P does not include ZC-ZR light). A ZC to ZR connec-
tion is required, either by factory-installed jumper or through
boiler aquastat. (ARM-2P does not include ZC-ZR relay or
terminals.) Terminals ZC-ZR are 120 VAC connections.
4. Zone circulator relay closes turning on circulator. “Circulator
On” light turns on.
If Priority Switch Is In “ON” Position
1. Zone 1 becomes priority zone.
2. When zone 1 calls for heat, priority zone is activated and
all other zones are deactivated (Circulators for zones 2 and
higher and any zone modules will not operate). “Priority On”
light turns on.
3. Built-in timer automatically shuts off priority feature tempo-
rarily if priority zone calls for heat longer than 30 minutes
allowing all zones to operate.
4. Repeats every 30 minutes until priority zone is satised. Pre-
vents house freeze-up in event of indirect water heater mal-
function.