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Part number 550-100-400/0119
15
6
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6
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Figure 9 Ultra oiler ith Ultra LUS or AUA LUS ater heater tpical pipin
schematics
for Figure 10 and Figure 9
DHW circulator (see page 56 for sug-
gested sizing)
System circulator (provided by installer)
Diaphragm type expansion tank ONLY
— DO NOT use a closed-type tank with
AQUA PLUS water heaters, because the
automatic air vent will deplete the air
from the system, causing the expansion
tank to waterlog.
Air separator with automatic air vent
Flow/check valves
Boiler circulator — provided with boiler
Zone valves, typical
Make-up water supply
Primary/secondary connection
DHW connections — see water heater
manual for piping
Strap system supply and return sensors
to lines as shown, at least 6 pipe diam-
eters (but no more than 3 feet) from
boiler connection tees.
Systems using high-head pumps may
require a bypass pressure regulator to
prevent damage to control valves.
DHW relief valve must be installed in the
tapping on top of the AQUA PLUS water
heater.
Items supplied with boiler
Items supplied by others
For residential space heating appli-
cations (other than radiant heating
or unit heaters) ONLY, you can use:
-80
-105, -155
-230
-299/310, 399
1” or larger
1¼” or larger
1½” or larger
2” or larger
Recommendations are based on a 20°F temp
drop through the system.
Zone piping selection for series loops
with fi nned-tube baseboard — general
Copper pipe and
baseboard size
Max recommended
feet of baseboard
¾"
1"
106
179
Contact your supplier to size the system and zone
circulators needed. See below for zone piping
using Taco 007 or equivalent circulators.
Limits for series loop zones with
fi nned-tube baseboard using
Taco 007 (or equivalent) circulators
Copper
pipe and
baseboard
Max
load
MBH
Max feet of
baseboard
Max total
length of
circuit (feet)
¾"
1"
50
79
82
104
93
123
Figure 10 Ultra oiler ith Ultra LUS or AUA LUS- - or - ater heater one ale onin tpical pipin
12
20
23
27
10
10
7
5
9
8
Boiler loop pipe size
Ultra-80, -105
Ultra-155, -230
Ultra-299/310, 399
1” or larger
1¼” or larger
1½ or larger
DHW loop pipe size
See Figure 7, page 14
®
Series 4
gas-fired water boiler — Boiler Manual
Using with Weil-McLain AQUA PLUS water heaters
(cont.)
See - roduct anual for tpical ater pipin.
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