750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
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6.11 — Operating Limit Temperature Control: Hot Water 6-9
6.12 — Low Water Cutoff Devices: Steam and Hot Water 6-10
6.13 — Combustion Air Proving Switch 6-10
6.14 — Atomizing Air Proving Switch 6-11
6.15 — Gas Pilot Flame Adjustment 6-11
6.16 — Gas Pressure and Flow Information 6-13
6.16.1 — Pressure 6-13
6.16.2 — Gas Flow 6-15
6.16.3 — Pressure Correction 6-15
6.16.4 — Checking Gas Flow 6-17
6.17 — Gas Fuel Combustion Adjustment 6-18
6.17.1 — Burner Low-Fire Adjustment 6-20
6.18 — Low-Gas-Pressure Switch 6-21
6.19 — High-Gas-Pressure Switch 6-21
6.20 — Fuel Oil Pressure and Temperature: General 6-21
6.21 — Fuel Oil Combustion Adjustment 6-23
6.21.1 — Standard Burner Low-Fire Adjustment 100-200 HP 6-24
6.21.2 — Burner Low-Fire Adjustment 250-800 HP 6-24
6.22 — Burner Drawer Adjustment 6-24
6.23 — Oil Drawer Switch 6-26
6.24 — Low-Oil-Temperature Switch: Heavy Oil 6-26
6.25 — High-Oil-Temperature Switch: Optional 6-26
6.26 — Low-Oil-Pressure Switch: Optional 6-26
6.27 — Electric Oil Heater Thermostat: 400 and 600 Series (Steam) 6-26
6.28 — Steam Oil Heater Thermostat: No. 6 Oil, 400 and 600 Series (Steam) 6-27
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