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Part number 550-141-825/1211
20
GOLD
WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 —
Boiler Manual
SERVICE TECHNICIAN ONLY — read and follow completely.
Piping MULTIPLE ZONES
Follow instructions on page 18 and page 19 to install
piping near boiler.
See Figure 11 or Figure 12 to complete installation.
Zoning with circulators:
1. Size each circulator to individual circuit require-
ments.
2. Remove circulator (when furnished as standard
equipment).
3. Install balancing valves to adjust flow to distribute
heat to all zones.
4. Separate relay is required for each circulator.
Zoning with zone valves:
1. Install balancing valves to adjust flow to distribute
heat to all zones.
2. Separate transformer is required to power zone
valves. Refer to “Weil-McLain Zone Valve Wiring
Guide” for details.
Zone 2
Zone 1
5
1
2
1
3
Connect water piping
(continued)
Figure 11
Multiple zoning with CIRCULATORS
Zone 2
Zone 1
4
5
1
1
Legend
1
Isolation valve
2
Flow control valve
3
Circulator
4
Zone valve
5
Drain valve
Figure 12
Multiple zoning with ZONE VALVES