Install Instructions

6
ESC Series
Boiler Model Input (MBH)
(1)
Heating Capacity
(MBH)
Net AHRI Rating, Water
(MBH)
(2)
AFUE (%)
ESC3C 60.8 52 45 85.5
ESC4C 91.2 78 68 85.4
ESC5C 121.6 104 90 85.3
ESC6C 152.0 130 113 85.2
ESC7C 182.4 156 136 85.0
ESC8C 212.8 180 157 84.5
ESC9C 243.2 206 179 84.0
(1)
Input ratings can be used for elevations up to 2000 ft above sea level. Refer to Appendix F for elevations 2000 ft or higher.
(2)
Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. Consult manufacturer before selecting boiler for
installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.
Ratings
SPECIFICATIONS
Boiler
Model
Depth Width Height
Supply NPT
(inch)
Return NPT
(inch)
Vent
(inch)
Air
Intake
(inch)
Gas NPT
(inch)
Relief Valve
NPT
(inch)
Drain
IPS
(inch)
ESC3C 33 12¾ 41 1¼ 1¼ 3 3 ½ ¾ ¾
ESC4C 33 15½ 41 1¼ 1¼ 3 3 ½ ¾ ¾
ESC5C 33 18½ 41 1¼ 1¼ 3 4 ½ ¾ ¾
ESC6C 33 21½ 41 1¼ 1¼ 3 4 ½ ¾ ¾
ESC7C 33 24¾ 41 1¼ 1¼ 3 5 ¾ ¾ ¾
ESC8C 33 27¾ 41 1¼ 1¼ 4 5 ¾ ¾ ¾
ESC9C 33 30¾ 41 1¼ 1¼ 4 5 ¾ ¾ ¾
Dimensions, Weights and Connections
Electrical Requirements: 120VAC, 60 Hz, 1-ph, 15A
Boiler Model
Allowable Supply Water
Temperature (°F)
Minimum Return Water
Temperature (°F)
Minimum Flow
(GPM)
Waterside Pressure Drop
at 20°F DT (Ft. of Head)
ESC3C 130-220 110 None <1
ESC4C 130-220 110 None <1
ESC5C 130-220 110 None <1
ESC6C 130-220 110 None <1
ESC7C 130-220 110 None <1
ESC8C 130-220 110 None <1
ESC9C 130-220 110 None <1
Water Temperatures and Flows
Boiler Model Shipping Weight (lbs) Empty Weight (lbs) Water Content (gal)
ESC3C 250 170 2
ESC4C 300 220 3
ESC5C 350 270 4
ESC6C 410 320 5
ESC7C 460 370 5
ESC8C 510 420 6
ESC9C 560 470 7
Weights and Volume
Maximum Allowable Working Pressure - 50 psi. Boiler shipped from factory with a 30 psi relief valve.