Smith Cast Iron Boilers GB250 SERIES 15

FIGURE 2.17: WIRING DIAGRAM & OPERATION SEQUENCE FOR BOILERS EQUIPPED WITH STANDING PILOT, VENT DAMPER & 400 SERIES LWCO (EXCEPT FOR GB-250-8 & 9)

FIGURE 2.18: WIRING DIAGRAM & OPERATION SEQUENCE FOR BOILERS EQUIPPED WITH STANDING PILOT, VENT DAMPER & 400 SERIES LWCO (GB250-8 & 9 ONLY)

Contents

INSTALLATION, OPERATION &MAINTENANCE MANUAL AND REPLACEMENT PARTS LIST Gas-FiredSteam Cast Iron Boilers 175,000 to 400,000 Btuh Input Standing Pilot, Standing Pilot & Vent Damper SECTION 1: INTRODUCTION CODE COMPLIANCE VENTING REQUIREMENTS CHIMNEY REQUIREMENTS COMBUSTION AIR REQUIREMENTS WATER TREATMENT SHIPMENT OF BOILER Optional Vent Damper SECTION 2: BOILER INSTALLATION STEP 1: LOCATING AND SETTING THE BOILER STEP 2: INSTALLING STEAM PIPING STEP 3: INSTALLING HYDRONIC COMPONENTS STEP 4: VENTING BOILER Installing Vent Damper Page STEP 5: INSTALLING & TESTING GAS PIPING Testing Gas Piping STEP 6: WIRING THE BOILER Page Page Page Page SECTION 3: START-UP& OPERATION Page WARNING: LIGHTING CONTINUOUS PILOT INSTRUCTIONS OPERATING INSTRUCTIONS Intermittent Ignition White Rodgers 36C74/Honeywell VR8304 SECTION 4: MAINTENANCE BEFORE EACH HEATING SEASON Steam Boiler Cleaning Instructions HOW TO CHANGE ORIFICES HEATING SYSTEM PROBLEMS & CAUSES No Heat Insufficient Heat Odor, Excessive Moisture In Building Yellow Flame, Carbon Build-Up Page Standing Pilot Honeywell Intermittent Pilot System Page WARNING