Using With Weil-Mclain Plus Water Heaters - Weil-McLain Ultra 3 series User Manual
Gas-fired water boilers ultra 3 series;
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Also See for Ultra 3 series:
- User's information manual (13 pages) ,
- Quick start manual (7 pages) ,
- Quick start manual (7 pages)
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gas
fired water boiler
Using with Weil-McLain PLUS water heaters
See ADVANCED INSTALLATION section for additional piping information and applications.
PLUS DHW installation — quick-selection
The information in this section is for usage of Ultra boilers
with Weil-McLain 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 off space heating
during DHW heating (if DHW input is priority 1). The boiler
circulator will turn off, preventing hot water from circulating
to the system (optional timeout setting can be used to over-
ride).
DO NOT use a closed-type expansion tank on a system with
a Weil-McLain PLUS water heater. The 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 PLUS water heaters.
1.
Follow the guidelines on this page and
heater to the boiler. Use Figure 8 for dedicated water heating-only
applications. Use Figure 9 and Figure 10, page 15 for combined space
heating/water heating applications.
Figure 7
Use the table below to size DHW loop piping and select a circulator (see ADVANCED section for other DHW tanks)
Boiler
Partial load (see Figure 9 and Figure 10, page 15)
Ultra-
(combined space heating/water heating application)
PLUS
GPM
MBH
model
115/140
80
40
6.5
71/71
(71 MBH)
60
6.5
71/71
80
6.5
71/71
105
40
10.1
94/94
(94 MBH)
60
6.4
94/94
80
6.4
94/94
155
40
12.1
119/98
(139 MBH)
60
12.1
139/120 295/220
80
12.1
139/139 305/230
230
40
13.5
120/100 251/162
(207 MBH)
60
18.4
169/128 350/207
80
13.5
207/207 430/325
299
40
13.1
120/100 250/162
(252 MBH)
60
19.3
170/129 351/208
80
24.9
252/252 510/381
399
40
13.1
120/100 250/162
(365 MBH)
60
19.3
170/129 351/208
80
24.9
320/253 636/382
14
— Boiler Manual
page 15 to connect the water
GPH
Head
DHW
115/140
loss (ft)
pipe size
160/124
8.5
1
168/132
8.5
1
176/140
8.5
1
217/154
17.0
1¼
211/162
8.6
1
219/170
8.6
1
248/160
15.9
1¼
15.9
1¼
15.9
1¼
15.2
1¼
23.7
1½
15.2
1¼
9.7
1¼
11.7
1½
18.4
1½
9.7
1¼
11.7
1½
18.4
1½
Figure 8
2.
The PLUS water heater can also be installed as one
of the zones in the system. This method, however,
requires flow through the main system even during
the summer (non-space heating) months. Piping
as shown in Figure 9 and Figure 10, page 15 allows
isolation of flow to just the water heater piping
during non-heating periods.
Dedicated boiler (see Figure 8)
CIRC
PLUS
GPM
MBH
model
115/140
007
40
6.5
71/71
007
60
6.5
71/71
007
80
6.5
71/71
0014
40
6.4
94/86
007
60
6.4
94/94
007
80
6.4
94/94
0014
40
12.1
119/98
0014
60
12.1
139/120 295/220
0014
80
12.1
139/139 305/230
0014
40
Not recommended — boiler capacity
exceeds maximum output of water heater
1400-20
60
0014
80
13.5
207/207 430/325
0010
40
0014
60
1400-20
80
0010
40
0014
60
1400-20
80
Ultra boiler with Ultra PLUS or PLUS
water heater — dedicated water heating
application, typical piping schematic
(water heating only)
GPH
Head
DHW
115/140
loss (ft)
pipe size
160/124
8.5
1
168/132
8.5
1
176/140
8.5
1
203/141
8.6
1
211/162
8.6
1
219/170
8.6
1
248/160
15.9
1¼
15.9
1¼
15.9
1¼
15.2
1¼
Not recommended —
boiler capacity exceeds
maximum output of water heater
Part number 550-100-090/0809
CIRC
007
007
007
007
007
007
0014
0014
0014
0014
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