Install Instructions
16
AR861-2II & AR861-3II APPLICATIONS
! !
WARNING
AR relays will not work properly if 120 VAC polarity is not the same
boiler aquastat. The neutral and hot wires must not be reversed.
power that may activate the boiler under certain circumstances that
may cause serious injury or death.
! !
WARNING
When using ZC-ZR careful attention must be paid to keeping the po-
larity of the wiring consistent between the Argo control and the boiler
aquastat. Failure to do so could result in a secondary source of power
activating the boiler under certain circumstances which could result
in serious injury or death. Always disconnect power to both the Argo
control and the boiler when installing or servicing this product.
Terminals
W
and
R
to Aquastat
(
W
to ZC and
R
to ZR)
Each of the low voltage controllers (SPST Thermostats) will actuate a circulator
and start the burner when used in conjunction with a boiler aquastat control. If the
boiler temperature drops below the low limit (circulator) setting, all circulating will
cease until the temperature of the boiler water is increased.
Jumper: To be placed between terminals
L
and
A
. In this position a line voltage
message is sent out
R
to ZR terminal on the aqustst and returns to
W
from the
ZC terminal on the aqustst.