Keystone Oil-Fired Cast Iron Hot Water Boiler Installation, Operation & Maintenance Manual

About this 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.

What's inside

• Boiler Ratings and Capacities
• Rules for Safe Installation and Operation
• Minimum Clearance Dimensions
• Fresh Air for Combustion
• System Piping
• Electrical Connections
• Maintenance
• Repair Parts

Specifications

Frequently asked questions

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.

What is the maximum operating pressure of the boiler?

The boiler is rated for a maximum working pressure of 50 psig.