Install Instructions

Part number 550-100-090/1113
15
GAS-FIRED WATER BOILER — Boiler Manual
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Using with Weil-McLain PLUS LINE water heaters (cont.)
See !15!0,53 - Product Manual for typical water piping.
&IGURE Ultra boiler with Ultra PLUS or PLUS-40, -60 or -80 water heater, zone valve zoning, typical piping
&IGURE Ultra boiler with Ultra PLUS or PLUS water heater, typical piping schematics
,EGENDfor Figure 9 and Figure 10
 DHW circulator (see page 52 for suggested
sizing)
 System circulator (provided by installer)
 Diaphragm type expansion tank ONLY
— DO NOT use a closed-type tank with
PLUS water heaters, because the auto-
matic 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
 Strap system supply and return sensors to
lines as shown, at least 6 pipe diameters
(but no more than 3 feet) from boiler
connection tees.
 DHW connections — see water heater
manual for piping
 Automatic air vent must be installed in
the vent tapping on top of the PLUS water
heater.
Items supplied with boiler
Items supplied by others
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: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, 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 finned-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
finned-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, 399
1” or larger
1¼” or larger
1½ or larger
$(7LOOPPIPESIZE
See Figure 7, page 14
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