Installation/Operating Guide

4
The following important product information is located
on the cabinet cover:
• Model Number
• Manufacturer's Serial Number
• BTU Rating
• Heating Element Ratings
• Water Pressure & Temperature Limits
• CSA Listing
• ASME Stamp
• Total Amps
• Clearance
ARGO Electric Boilers are controlled by a electronic
temperature controller. The controller controls the
boiler water temperature with multiple stages and
turns stages on based on the heating demand,
and the preset boiler outlet water temperature. The
controller also can control 120Vac circulating pumps
rated up to 5A. When the thermostat calls for heat,
the controller will operate the boiler to regulate the
water temperature at a pre-selected set point. The
system pump is on whenever there is a thermostat
calling for heat.
VOLTAGE RATING TABLES
A - STANDARD 240V RATINGS
“AT” Series - 2 Element Boiler
Model
Boiler
Size
Nominal
KW
Operating
Voltage
(AC)
Net
Heat
Output
BTU/Hr.
Power
Input
Watts
Total
Heating
Element
Amperage
Number of
Elements
Element
Size
(Watts)
Maximum
Amperage
Per Leg (1)
Suggested
Wire Size
(AWG) (2)(3)
Suggested
Breaker Size
(Amps) (3)
AT0623 6 240 20,472 6,000 25.0 2 3,000 31.0 8 40
AT0824 8 240 27,296 8,000 33.3 2 4,000 39.3 6 50
AT1025 10 240 34,120 10,000 41.7 2 5,000 47.7 6 60
AT1226 12 240 40,944 12,000 50.0 2 6,000 56.0 4 70
“AT” Series - 4 Element Boiler
AT1243 12 240 40,944 12,000 50.0 4 3,000 56.0 4 70
AT1644 16 240 54,592 16,000 66.7 4 4,000 72.7 3 90
AT2045 20 240 68,240 20,000 83.3 4 5,000 89.3 2 100
AT2446 24 240 81,888 24,000 100.0 4 6,000 106.0 1 125
B - DE-RATED 208V RATINGS
“AT” Series - 2 Element Boiler
Model
Boiler
Size
Nominal
KW
Operating
Voltage
(AC)
Net
Heat
Output
BTU/Hr.
Power
Input
Watts
Total
Heating
Element
Amperage
Number of
Elements
Element
Size
(Watts)
Maximum
Amperage
Per Leg (1)
Suggested
Wire Size
(AWG) (2)(3)
Suggested
Breaker Size
(Amps) (3)
AT0623 6 208 15,377 4,507 21.7 2 3,000 27.7 8 40
AT0824 8 208 20,502 6,009 28.9 2 4,000 34.9 8 50
AT1025 10 208 25,628 7,511 36.1 2 5,000 42.1 6 60
AT1226 12 208 30,753 9,013 43.3 2 6,000 49.3 6 70
“AT” Series - 4 Element Boiler
AT1243 12 208 30,753 9,013 43.3 4 3,000 49.3 6 70
AT1644 16 208 41,005 12,018 57.8 4 4,000 63.8 4 90
AT2045 20 208 51,256 15,022 72.2 4 5,000 78.2 3 100
AT2446 24 208 61,507 18,027 86.7 4 6,000 92.7 1 125
(1) Allows for 6A control and accessory load in addition to heat load
(2) Type “THW” wire, copper only, check local codes (Sizes taken from C.E.C Table 2 & N.E.C. Table 310-16.)
(3) Actual wire and breakers need to be sized based on specic installation requirements in accordance with National Electrical Code (NEC),
Canadian Electrical Code (CEC), and local codes (where applicable).
PRODUCT DESCRIPTION continued