Smith Cast Iron Boilers GB250 SERIES 13

FIGURE 2.13: WIRING DIAGRAM & OPERATION SEQUENCE FOR BOILERS EQUIPPED WITH INTERMITTENT PILOT, VENT DAMPER & MCDONNELL-MILLER #67 LOW WATER CUT-OFF

FIGURE 2.14: WIRING DIAGRAM & OPERATION SEQUENCE FOR BOILERS EQUIPPED WITH STANDING PILOT, VENT DAMPER & MCDONNELL- MILLER #67 LOW WATER CUT-OFF (EXCEPT FOR GB250-8 & GB250-9, N.G.)

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