Weil-McLain UltraOil Series 3 Installation, Start-Up, And Operating Instructions Manual page 16

®
Series 3
Connect water piping
Piping MULTIPLE ZONES — System temperature 140 °F or higher
1. Follow instructions on page 14 and 15 to install
piping near boiler.
2. Zoning with circulators (Figure 8)
a. Size each circulator to individual circuit require-
ments.
b. Remove circulator (when furnished as standard equip-
ment).
c. Install balancing valves to adjust fl ow to distribute heat
to all zones.
Figure 8
1
2
UO014
16
— Boiler Manual
WATER BOILER
Multiple zoning with circulators –
Temperatures 140 °F and higher
Zone 2
Zone 1
1 1
5
1 Isolation valve
2 Flow control valve
3 Circulator
(continued)
d. Separate relay is required for each circulator.
3. Zoning with zone valves (Figure 9)
a. Install balancing valves to adjust fl ow to distribute
heat to all zones.
b. Separate transformer is required to power zone valves.
Refer to "Weil-McLain Zone Valve Wiring
Guide" for details.
Figure 9
1
1
2
3
5 5
UO015
4 Zone valve
5 Drain valve
Multiple zoning with zone valves –
Temperatures 140 °F and higher
Zone 2
Zone 1
1 1
3
Part number 550-142-182/1014
1
4
5