Ultra Boiler Manual

Part number 550-100-440/0122
14
  

See AQUA PLUS - Product Manual for typical water piping.


e information in this section is for usage of Ultra boilers
with Weil-McLain AQUA PLUS indirect water heaters.
For dedicated DHW applications, use the circulator supplied
with the boiler to circulate to the water heater as shown in
this section.
By default, the U-Control Module turns o space heating dur-
ing DHW heating (if DHW input is priority 1). e boiler cir-
culator will turn o, preventing hot water from circulating to
the system (optional timeout setting can be used to override).
DO NOT use a closed-type expansion tank on a system with
a Weil-McLain AQUA PLUS water heater. e water heater
must use an automatic air vent. Operation of the automatic
air vent will deplete air in the piping, causing the expansion
tank to waterlog. Always use a diaphragm- or bladder-type
expansion tank with AQUA PLUS water heaters.
1. Follow the guidelines on this page and page15 to connect the water
heater to the boiler. Use Figure8 for dedicated water heating-only ap-
plications. Use Figure9,page15 and Figure10,page15 for combined
space heating/water heating applications.
See ADVANCED INSTALLATION section for additional piping information and applications.
Figure 7 Use the table below to size DHW loop piping and select a circulator (see ADVANCED section for other DHW tanks)
Boiler
Ultra
Partial load (see Figure 9, page 15 and Figure 10, page 15)
(combined space heating/water heating application)
Dedicated boiler (see Figure 8)
(water heating only)
PLUS
model
GPM MBH
115/140
GPH
115/140
Head
loss (ft)
DHW
pipe size
CIRC PLUS
model
GPM MBH
115/140
GPH
115/140
Head
loss (ft)
DHW
pipe size
CIRC
-80
(71 MBH)
40 6.5 71/71 160/124 8.5 1 007 40 6.5 71/71 160/124 8.5 1 007
60 6.5 71/71 168/132 8.5 1 007 60 6.5 71/71 168/132 8.5 1 007
80 6.5 71/71 176/140 8.5 1 007 80 6.5 71/71 176/140 8.5 1 007
-105
(94 MBH)
40 10.1 94/94 217/154 17.0 1¼ 0014 40 6.4 94/86 203/141 8.6 1 007
60 6.4 94/94 211/162 8.6 1 007 60 6.4 94/94 211/162 8.6 1 007
80 6.4 94/94 219/170 8.6 1 007 80 6.4 94/94 219/170 8.6 1 007
-155
(139 MBH)
40 12.1 119/98 248/160 15.9 1¼ 0014 40 12.1 119/98 248/160 15.9 1¼ 0014
60 12.1 139/120 295/220 15.9 1¼ 0014 60 12.1 139/120 295/220 15.9 1¼ 0014
80 12.1 139/139 305/230 15.9 1¼ 0014 80 12.1 139/139 305/230 15.9 1¼ 0014
-230
(207 MBH)
40 13.5 120/100 251/162 15.2 1¼ 0014 40
Not recommended — boiler capacity
exceeds maximum output of water heater
60 18.4 169/128 350/207 23.7 1½ 1400-20 60
80 13.5 207/207 430/325 15.2 1¼ 0014 80 13.5 207/207 430/325 15.2 1¼ 0014
-299
(252 MBH)
40 13.1 120/100 250/162 9.7 1¼ 0010 40
Not recommended —
boiler capacity exceeds
maximum output of water heater
60 19.3 170/129 351/208 11.7 1½ 0014 60
80 24.9 252/252 510/381 18.4 1½ 1400-20 80
-399
(365 MBH)
40 13.1 120/100 250/162 9.7 1¼ 0010 40
60 19.3 170/129 351/208 11.7 1½ 0014 60
80 24.9 320/253 636/382 18.4 1½ 1400-20 80
Figure 8 Ultra boiler with AQUA PLUS water heater —
dedicated water heating application, typical piping
schematic
10
12
8
20
9
U3022
27
23
2. e AQUA PLUS water heater can also be installed
as one of the zones in the system. is method,
however, requires ow through the main system
even during the summer (non-space heating)
months. Piping as shown in Figure9,page15 and
Figure10,page15 allows isolation of ow to just
the water heater piping during non-heating periods.