Weil-McLain SGO SERIES 4 OIL-FIRED STEAM BOILER SGO-7 User Manual

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Part number 550-142-330/0421

SGO

OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 4 — Boiler Manual

SERVICE฀TECHNICIAN฀ONLY฀—฀read฀and฀follow฀completely.

Item฀

No.

DescriptionPart฀number

1 Syphon, 180° Bend, 1/4" brass pipe 560-640-698

Steam relief valve, set to relieve at 15 PSIG., 3/4" NPT inlet

3/4" NPT side outlet, 300 lbs./hr steam capacity

511-548-023

Steam relief valve, set to relieve at 15 PSIG., 3/4" NPT male inlet

3/4" NPT female side outlet, 407 lbs./hr steam capacity

3 Steam pressure gauge, 0-30 PSIG. 510-218-045

4 Gauge cock set, B15, standard stem 510-218-135

5 Gauge glass kit, includes glass, gaskets and brass washers 383-600-001

6 Water gauge glass guard, 105/8" long 563-334-597

High pressure limit control, operating range 0.5-9 PSI., additive differential 1-5 PSI.

510-312-135

High pressure limit control, operating range 0-15 PSI., differential 2-8 PSI.

8 High temperature limit control, spst, automatic recycle with 3/4" well (used in tankless heater kit) 510-312-209

9 Low water cutoff, oat type 511-114-495

10 Low water cutoff, probe type 511-100-007

Drain cock, 3/4", 11/2" shank 511-210-423

Drain cock, 3/4" 511-246-392

12 Balanced draft damper (barometric) 7" 510-512-267

13 Junction box wiring harness assembly (Semi-packaged and Knocked-down boilers only) 591-391-848

14 Junction box cover assembly with service switch 591-391-854

15 Burner harness assembly 591-391-850

16 Limit control without well, spdt (for tankless heater) 510-311-024

17 Junction box-wiring harness assembly (SGO – oat low water cutoff only - Packaged only) 591-391-842

18 Junction box-wiring harness assembly (SGO - probe low water cutoff only - Packaged only) 591-391-965

19 Flue pipe brackets (requires 2 of this item) (Not shown) 426-700-268

Tankless Heater - steam boiler, includes heater, gasket, nuts and studs.

For SGO-3 through 9 (Not shown)

590-921-903

21 OVD-7 Vent damper kit – Required for SGO-3 through 7 381-800-515

Replacement parts (continued)

Figure฀30 SGO Series 4 Trim Parts

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Weil-McLain SGO SERIES 4 OIL-FIRED STEAM BOILER SGO-7 Residential Boilers