User Guide

ManualsBrandsWeil-McLain ManualsBoilersCGI-25 - 35,000 BTU Output Cast Iron Boiler, Spark Ignition - Series 4 (Nat Gas)

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Part Number 550-142-301/0420

User’s Information Manual

1 Gas valve

2 Pilot burner (Not shown)

3 Main burner

4 Gas manifold/orices

5 Control module

6 Inducer (CGi only)

8 Water temperature/LWCO sensor

9 Transformer

11 Air pressure switch (CGi only)

12 Rollout thermal fuse element

14 Circulator

15 Relief valve

16 Gauge (pressure/temperature)

17 Drain valve

Boiler components

CGi Series 4