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Ready-To-Run models include a circulator with built-in priority zoning relay. The aquastat is pre-wired and controls the
circulator. Line voltage must be supplied and a signal wire must be run to fire the boiler.
To wire RTR models, select the appropriate diagram from the following pages. If a suitable diagram is not available for your
application, please contact AMTROL Tech Support at (401)535-1216. Always disconnect power before wiring the unit. Ensure
that the proper conduit and connections are used per your local code. In lieu of local code, the National Electric Code should
be followed.
DHW AQUASTAT
FACTORY WIRED
LINE OUT
CANCELS ON
CALL FOR DHW
DRY CONTACT
TO BOILER OR
EXTERNAL RELAY
LINE IN
LIVE
NEUT
PR
OUT
PR
IN
CIRCULATOR RELAY OPERATION
1234
HONEYWELL L8148A OR SIMILAR W/120V HIGH LIMIT
CIRCULATOR RELAY BOX
LIVE
NEUT
PR
OUT
PR
IN
1234
L1 L2 TT
HIGH
LIMIT
INPUT
C1 C2
L1
L2
Indirect
Aquastat
10. WIRING ALL READY-TO-RUN (RTR) MODELS