Piping Multiple Zones - Weil-McLain WTGO 4 Series Manual

WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4 —
Connect water piping

Piping MULTIPLE ZONES

Follow instructions on page 18 and page 19 to install
piping near boiler.
See Figure 13 or Figure 14 to complete installation.
Zoning with circulators:
1. Size each circulator to individual circuit require-
ments.
2. Install balancing valves to adjust flow to distribute
heat to all zones.
3. 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 manufacturers installation instruc-
tions for wiring or contact our Technical Services
group for assistance.
3. Pressure bypass valve recommended on zone valve
systems to prevent excessive flow in a single zone
or water hammer when valves close.
Legend
1
Isolation valve
2
Flow control valve
20
SERVICE TECHNICIAN ONLY — read and follow completely.
(continued)
3
Circulator
4
Zone valve
5
Drain valve
Boiler Manual
Figure 13
Multiple zoning with CIRCULATORS
Zone 2
Zone 1
Figure 14
Multiple zoning with ZONE VALVES
Zone 2
Zone 1
1
2
3
1
5
1
4
5
1
Part number 550-142-332/0421