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- Manuals
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- Languages
- EN
- Last added
- 2026-10-01
Featured KeyStone manuals
Keystone Oil-Fired Cast Iron Hot Water Boiler Installation, Operation & Maintenance Manual
The manual describes Keystone's low‑pressure, sectional cast‑iron oil‑fired hot‑water boilers, their ratings, capacities, and safety warnings. It lists model numbers, firing rates, heating capacities, and required clearances, and explains the included components such as the Honeywell aquastat and pressure gauge.
Detailed sections cover site preparation, boiler location, fresh‑air requirements, piping, venting, electrical connections, commissioning, routine maintenance, burner cleaning, and troubleshooting. The document also includes wiring diagrams, sequence of operations, and a parts list for service technicians.
Covers: Boiler Ratings and Capacities · Rules for Safe Installation and Operation · Minimum Clearance Dimensions · Fresh Air for Combustion · System Piping · Electrical Connections
Latest KeyStone manuals
Keystone Oil-Fired Cast Iron Hot Water Boiler Installation, Operation & Maintenance Manual
Service Manual 40 pages · 3.1 MB · ENThis manual provides installation, operation, and maintenance instructions for Keystone oil‑fired cast iron hot water boilers.
Which document do I need?
Service Manual
Disassembly, diagnostics and part numbers, for repair.
Questions answered in KeyStone manuals
What clearances are required around the boiler?
Boilers must be installed at least 6 inches from combustible material on all sides, with an 18 inch side clearance for access and a minimum 24 inch front clearance for servicing.
From: Keystone Oil-Fired Cast Iron Hot Water Boiler Installation, Operation & Maintenance Manual
What is the maximum operating pressure of the boiler?
The boiler is rated for a maximum working pressure of 50 psig.
From: Keystone Oil-Fired Cast Iron Hot Water Boiler Installation, Operation & Maintenance Manual