AESYS Technologies, LLC - Boilers & HVAC

	Series 500L 5SF-FSHS/BHP (.046m² - FSHS/kW) Packaged firetube boiler assemblies incorporating three- and four- pass, low-offset furnace, water-back technology and rated at nominal 5SF-FSHS/BHP (.046m² - FSHS/kW). Capacities available from 20 to 1,000 BHP (196 to 9,803 kW) at standard design pressures of 15 to 300 PSIG (103 to 2,068 kPa).
Due to large water content, liberal steam volume and water to steam interface disengaging area, the Y-SG Series 500L is particularly suited for continuous or intermittent process and space heating load demand operation. Low furnace heat release rates assure reduced vessel stress and thermal NOx production.

Series 500L	S3W/S4W	H3W/H4W	H3W/H4W
Standard Safety, Operation and Level Control Devices	S050 to S300	S015	W030 to W160
Pressure Gauge	•	•	•
Temperature Gauge	N/A	N/A	•
Float-Type LWCO - Pump Control w/ Gauge Glass Assembly	•	•	N/A
Probe-Type LWCO - Manual Reset	•	•	•
High-Pressure Limit Control - Manual Reset	•	•	•†
Operating Pressure Limit Control	•	•	•†
Firing Rate Pressure Control	•	•	•†
Low-Fire Hold Pressure Control	•	•†	•†
Minimum Water Temperature Control	N/A	N/A	•†
ASME Safety Valve(s)	•	•	N/A
ASME Safety Relief Valve(s)	N/A	N/A	•
Single-Point Spring-Loaded Furnace Pressure Relief Device	•	•	•
† Temperature Limit Control

	High pressure steam boilers are constructed in accordance with ASME Section I ‘Rules for Construction of Power Boilers’ at standard design pressures of 50 to 300 PSIG (344 to 2068 kPa). For design pressure beyond standard offering, please consult factory.
	Low pressure steam and hot water boilers are constructed in accordance with ASME Section IV ‘Rules for Construction of Heating Boilers’ limited to design steam pressure of 15 PSIG (103 kPa) and hot water service of 30 to 160 PSIG (206 to 1103 kPa) – maximum 250°F (121°C).