Brochure

“AT” SERIES
ELECTRIC BOILERS
COMMERCIAL / RESIDENTIAL
Control Board - 4 Element Boiler
RTD Sensor
Neutral Terminal Block
Power to Elements
Power to Control Board
4 Element Electric Boiler with Breakers
4 Element Electric Boiler with Power Block
Absolute Efficiency – Total Comfort!
Not only is the new Argo “AT” Series Electric Boiler 100% efficient,
with operating temperatures from 90°F to 180°F, it’s ideal for both low tem-
perature radiant systems and standard hydronic heating in both
residential and commercial applications!
2 or 4 Element Configuration & Modular Boiler Configuration
Designed for maximum versatility, the Argo “AT” Series features a 2 Element boiler avail-
able in four capacities from 6 kw to 12kw and a 4 Element boiler available in four capaci-
ties from 12kw to 24kw. The Argo “AT” Series can also increase its’ capacity to 40kw by
“stacking” two boilers together in a Modular Boiler Configuration.
Circuit Breaker Load Center or Power Block
The “AT” Series is offered with a Circuit Breaker Load Center or Power Block.
The Circuit Breaker Load Center incorporates an electrical protection system of
factory-installed circuit breakers to protect each element and provide the added installation
flexibility required to meet or exceed local codes.
Microprocessor Based Control Board
The “AT” features an advanced Microprocessor
Control which safely and efficiently controls
the elements. Elements energize individually, with
additional elements energizing as needed depend-
ing on demand. The start-up element
is rotated so run time is balanced across all ele-
ments promoting longevity.
The “AT” Series utilizes a sensor connected
to a probe in an immersion well to determine
demand. This configuration relays water
temperature back to the control board allowing
the unit to efficiently maintain steady, even heat
using only the elements necessary to satisfy
demand. Thus the “AT” Boiler avoids the
constant peaks and valleys experienced by
others relying on a timer system resulting
in short-cycling of the elements that wastes ener-
gy and costs the user more in electricity.
Installation, Operation and Maintenance
The Argo “AT” Series features - Diagnostic Indicator Lights, a 30 Second Pre-Purge, an
Adjustable Temperature Set Point and Differential and a factory installed Circulator Relay
plus on board power for an External System Circulator. Optional components such as Low
Water Cut Off, Flow Switch, etc. are easily added via connections on
the control board. The “AT” is available in one compact cabinet size for ease of
installation. Safety features include Operating Limits with Back-Up, Redundant Relays Per
Element and Audible Alarms/Fault Codes.
Reliability
The Argo “AT” Series Electric Boiler features a one piece cast iron heat exchanger
and a 20 Year Heat Exchanger Warranty.
ARGO “AT” Series Electric Boilers
Power Distribution Block
Ground Connector Lug
Cabinet interior and exterior features durable baked-
on enamel finish.
Operating Temperature Control - Adjustable from 90°F to 180°F with a fixed 200°F high limit.
Operating Temperature Differential Control -
Adjustable range +/-4°F to +/-20°F
Additional contacts for
optional low water cut-off
and flow switch controls
Safety Switch (Green) - LED is
lit when there are no safety
faults
Self-diagnostic LED indicator - provides error code messages to
identify any malfunctions and provide quick resolution.
Circulator LED -
indicates operation when lit
Circulator terminal contacts
®