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.

General oil piping requirements

Location and installation of oil tanks, oil piping and burners must follow:

•฀NFPA 31 - latest edition, Standard for the Installation of Oil-

Burning Equipment.

•฀In Canada, CSA B139, Installation of Oil-Burning Equipment.

•฀Local codes and regulations.

•฀ Information provided with burner and fuel pump.

•฀If any part of fuel oil tank is above level of burner, installation of an

anti-siphon device is highly recommended to prevent ﬂow of oil in

case of oil line break.

•฀Support oil lines as required by codes.

•฀Make tank connections with swing joints or copper tubing to prevent

breaking in case the tank settles. Make swing joints so they will tighten

as tank settles. Non-hardening pipe joint compounds should be used on

all threads.

Do not use Teﬂon tape as an oil pipe sealant. It can cause valves

to fail, creating hazards. Do not use compression ﬁttings, only

ﬂare ﬁttings.

•฀Underground pipe must be run in a casing to prevent oil leaking into

ground or under ﬂoor. Check local codes for information.

Oil piping connection at burner

See Figure 25 for recommended connection at burner, allowing burner

mounting door to swing open completely for servicing.

Figure฀25 Recommended oil piping connection to burner

OVD-Vent damper wiring

Connect oil piping

Vent damper wiring

1. Boiler models SGO-3 through SGO-7 require the

installation of the Field Controls OVD-7 damper,

Weil-McLain part number 381-800-515. The

damper is included with Packaged SGO-3 to SGO-6

boilers, and is sold separately for Semi-packaged

and Knocked-down boilers.

2. When installing the boiler, wire all controls from

vent damper and thermal switch in accordance

with the OVD damper instruction sheet, which is

provided with the damper.

3. Connect damper wires to the burner by splicing the

burner wires as shown in the appropriate wiring di-

agram. See Figure 19, page 28 or Figure 22, page 30.

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