User Guide

Part number 550-100-400/0717
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&IGURE Ultra boiler with Ultra PLUS or AQUA PLUS-40, -60 or -80 water heater, zone valve zoning, typical piping
&IGURE Ultra boiler with Ultra PLUS or AQUA PLUS water heater, typical piping
schematics
,EGENDfor Figure 9 and Figure 10
 DHW circulator (see page 56 for suggested
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






:ONEVALVEZONING
3YSTEMZONEPIPESIZING
"ASEBOARDCONVECTORORCASTIRON
RADIATORS/.,9
For residential space heating appli-
cations (other than radiant heating
or unit heaters) ONLY, you can use:
5LTRA-ODEL 3YSTEMHEADER
-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
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
#IRCULATORZONING
"OILERLOOPPIPESIZE
Ultra-80, -105
Ultra-155, -230
Ultra-299/310, 399
1” or larger
1¼” or larger
1½ or larger
$(7LOOPPIPESIZE
See Figure 7, page 14
®
SERIES 4 GAS-FIRED WATER BOILERBoiler Manual
Using with Weil-McLain AQUA PLUS water heaters
(cont.)
See !15!0,53 - Product Manual for typical water piping.