Part number 550-142-058/0811
51
WM97+
gas
-
fired
water
boiler
—
Boiler Manual
EXPRESS SETUP — using default settings
(continued)
Figure 56
Using default control settings (
No DHW
)
ZONE VALVE-zoned systems
direct connection piping
Figure 57
Using default control settings (
No DHW
)
ZONE VALVE-zoned systems
primary/secondary piping
Legend and guidelines — Figure 56 and Figure 57
1.
Recommendation
: Wire zone thermostats to zone valves. Wire
zone valve end switches to the Zone 1 input on the 24-VAC
terminal strip. See Figure 52, page 47.
2.
Figure 56 ONLY
— Wire the Zone 1 circulator output to the
system circulator. See Figure 51, page 46.
Use Figure 56 ONLY if the system meets
the limitations given on page 36 and
page 37
. Install a system circulator when
applying Figure 57. Failure to comply could
cause heat delivery problems.
1
WM97+ boiler
2
Indirect water heater, when
used
3
Relief valve, supplied with
boiler, field piped — MUST be
piped to boiler supply connec-
tion — see page 10 for informa-
tion
4
Relief valve piping to drain —
see page 33
5
DHW circulator
6
Isolation valves
7
System circulator
8
Supplementary expansion tank,
diaphragm type, when used
9
Air separator
10
Flow/check valves
11
Purge/drain valves (one drain
valve is supplied loose with the
boiler)
12
Boiler circulator, with inte-
gral flow/check valve, factory
installed in boiler
13
Zone valves
14
Primary/secondary by-pass
valve — see page 34 for infor-
mation — OPEN: Boiler con-
nected as primary/secondary
20
Make-up water supply
21
By-pass pressure regulator, RE-
QUIRED for zone valve systems
23
Backflow preventer, when used
24
Zone circulators
25
Pressure reducing valve, when
used
26
Internal expansion tank,
diaphragm-type
27
Quick-fill valve, when used
28
DHW boiler water supply
connection, when used — see
page 11 for information
29
DHW boiler water return
connection, when used — see
page 11 for information
30
Pressure/temperature gauge,
supplied with boiler, field piped
31
Heating circuits
32
Additional heating circuits, if
any
= Items supplied with boiler
— all other items supplied by
installer