Harsco Industrial SC-1500 Installation & Owner's Manual page 40

1. A stainless steel vent adapter is required to mate the boiler exhaust connection and the vent pipe.
See the table below for the applicable part numbers.
2. A normally-closed motorized damper is required on the boiler's air intake. See the table below for
the applicable part numbers.
3. The draft, measured inside the vent at the rear of the boiler, must not exceed -0.05"
Excessive negative draft will cause nuisance trips such as flame failures.
4. The vent system must be properly drained of condensate before returning to the boiler. See
for information on installing condensate drains in the exhaust vent.
Table of Required Stainless Steel Vent Adapters and Category II Motorized Dampers
Boiler Nom. vent
Size Size
10"
SC-1500
10"
SC-2000
10"
SC-3000
10"
SC-4000
A normally-closed motorized combustion air damper with end limit switch is required for Category II
vent installations, and is optional for Category IV vent installations. 120VAC motorized dampers with
end limit switches are available for purchase from Harsco Industrial, Patterson-Kelley. Other damper
motor voltages are acceptable, provided they do not exceed 240VAC. The Air Damper Interlock circuit
for the end limit switch is always 120VAC which is sourced from the boiler itself. All end limit switches
must be rated for a minimum 120VAC.
Revised: June 2, 2017
Released: June 2, 2017
Stainless Vent Vent adapter
Adapter size
10"
2640000133
10"
2640000133
10"
2640000133
10"
2640000133
 HARSCO Industrial, Patterson-Kelley 2017
All Rights Reserved.
P-K SONIC
Technical Service 1.877.728.5351
Boiler Combustion Combustion air N.C.
Air inlet Motorized Damper
12"
12"
12"
12"
1004905978 P-K SONIC NURO Installation and
Owners Manual (Rev F Jun-2017).docx
®
Gas Fired Boiler
W.C.
3.7.7
Size
12"
1004906946
12"
1004906946
12"
1004906946
14"
1004906989
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