CleaverBrooks 4WI - 2.6 - Controls Common to Oil-Fired Boilers (Including Combination); 2.7 - Additional Controls for Heavy Oil; 2.8 - Controls for Combination Burners Only; 2.9 - Combustion Air

750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
iii
3.4 — Cleaning 3-7
3.4.1 — Hot Water and Steam Piping 3-7
3.4.2 — Pressure Vessel 3-7
3.5 — Boil-Out of a New Unit 3-8
3.6 — Washing Out 3-10
3.6.1 — Hot Water Boiler 3-10
3.6.2 — Steam Boiler 3-10
3.7 — Blowdown: Steam Boiler 3-11
3.7.1 — Types of Blowdown 3-11
3.7.1.1 — Intermittent Manual Bottom Blowdown 3-11
3.7.1.2 — Continuous Blowdown (Controlling TDS) 3-12
3.7.2 — Frequency of Manual Blowdown 3-12
3.7.3 — Manual Blowdown Procedure 3-13
3.8 — Periodic Inspection 3-13
3.9 — Preparation for Extended Layup 3-14
CHAPTER 4
Sequence of Operation 4-1
4.1 — Overview 4-1
4.2 — Circuit and Interlock Controls 4-2
4.3 — Sequence of Operation: Gas or Oil 4-3
4.3.1 — Pre-Purge Cycle 4-3
4.3.2 — Ignition Cycle 4-4
4.3.3 — Run Cycle 4-4
4.4 — Flame Loss Sequence 4-5
CHAPTER 5
Starting and Operating Instructions 5-1
5.1 — General Preparation for Startup: All Fuels 5-1
5.2 — Control Settings: Steam and Hot Water 5-2
5.3 — Gas Pilot 5-4