Aqua Pro Product Manual

Figure 7 Zoning with circulators — direct-connected system piping
Boiler-side piping
Part number 633-500-230/0918
11
AQUA PRO
TM
INDIRECT-FIRED WATER HEATERS — Product Manual
Maximum boiler-side flow rate
Recommended flow rate and minimum boiler-side pipe size
Select the boiler-side circulator carefully. The flow rate
through the boiler side of the water heater must not
exceed the values below. Higher flow rates could result
in an input above the rating of the T&P valve.
Models Aqua Pro
TM
30 & 55 — do not exceed 12 GPM.
Models Aqua Pro
TM
80 &119 — do not exceed 16 GPM.
Heater model GPM Pipe size Heater model GPM Pipe size
30
8.00 3/4”
80
14.00 1” *
55
8.00 3/4”
119
14.00 1” *
*Requires 1¼”x1” reducers at water heater
Notes
• Place circulators at begin-
nings of zones. Placing
them at the ends of zones
could result in heating idle
zones.
• Size manifold piping for
total flow of all zone cir-
culators.
• Locate flow / check valves
as close as possible to water
heater boiler side connec-
tions — to reduce heat loss
between cycles.
Wiring
• WMCR zone controller,
optional priority — Fig-
ure 25, page 23.
1. This drawing is conceptual
only. It shows representative
piping components and lay-
out. Weil-McLain does not
represent that this drawing
meets any particular me-
chanical or building codes.
The installer is responsible
for inclusion of all required
safety devices, or other mis-
cellaneous piping hardware
not shown on drawing. The
installer is responsible for
proper sizing / selection of
all hardware shown on this
diagram.
2. See boiler manual for spe-
cific details on installing the
boiler.