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GB250-IM-5
42-9185
GB250 SERIES
INSTALLATION, OPERATION
& MAINTENANCE MANUAL
AND REPLACEMENT PARTS LIST
Gas-Fired Steam Cast Iron Boilers
175,000 to 400,000 Btuh Input
Standing Pilot, Standing Pilot & Vent Damper,
Intermittent Pilot, Intermittent Pilot & Vent
Damper
SECTION 1: INTRODUCTION
Code Compliance. ....................................................2
Venting Requirements ..............................................3
Chimney Requirements ............................................3
Combustion Air Requirements..................................3
Water Treatment........................................................4
Shipment of Boiler ....................................................4
SECTION 2: BOILER INSTALLATION
Step 1: Locating/Setting Boiler..................................5
Step 2: Installing Steam Piping ................................6
Step 3: Installing Hydronic Components ..................7
Step 4: Venting Boiler................................................7
Step 5: Installing/Testing Gas Piping ......................10
Step 6: Wiring Boiler ..............................................11
SECTION 3: START-UP & OPERATION
Sequence Of Operation ..........................................16
Prior To Start-Up ....................................................16
Start-Up & Adjustments ..........................................16
SECTION 4: MAINTENANCE
Before Each Heating Season..................................19
How To Change Orifices ........................................20
Heating System Problems & Causes......................20
Replacement Parts List ..........................................21
Warnings ................................................................25
WESTCAST, INC.
260 NORTH ELM STREET WESTFIELD, MA 01085
TEL. (413) 562-9631 FAX (413) 562-3799
www.smithboiler.com