Weil-McLain WM97+110, Руководство пользователя

Страница: 68 / 132

Part number 550-142-085/0712
WM97+
gas
-
fired water boiler
— Boiler Manual
– 68 –
EXPRESS SETUP — using default settings
(continued)
Figure 76
Using default control settings (
No DHW
)
ZONE VALVE-zoned systems
primary/secondary piping
Figure 77
Using default control settings (
No DHW
)
ZONE VALVE-zoned systems
direct connection piping (
NOT
for WM97+155)
Legend and guidelines — Figure 76 and Figure 77
1.
Recommendation
: Wire zone thermostats to zone valves. Wire zone
valve end switches to the
ZONE 2
input on the 24-VAC terminal strip.
See Figure 72, page 64. Use isolation relays if connecting 3-wire zone
valve end switches. Boiler
ZONE 1
and
ZONE 3
are not used.
2.
Figure 76 ONLY
— Wire the
CIRC2
circulator output to the system
circulator. See Figure 71, page 63.
CIRC1
and
CIRC3
are not used.
Use Figure 77 ONLY if the system meets
the limitations given on page 42 and
page 43. Install a system circulator when
applying Figure 76. Failure to comply
could cause heat delivery problems.
1
WM97+ boiler
2
Indirect water heater, if used
3
Relief valve, supplied with
boiler, field piped — MUST
be piped to boiler supply
connection — see page 13 for
information
4
Relief valve piping to drain —
see page 37
5
DHW circulator
6
Isolation valves
7
System circulator
8
Supplementary expansion
tank, diaphragm type, if 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 38 or
page 39 for information —
OPEN: Boiler connected as
primary/secondary
20
Make-up water supply
21
By-pass pressure regulator,
REQUIRED for zone valve
systems
23
Backflow preventer, if used
24
Zone circulators
25
Pressure reducing valve, if
used
26
70/110 only — Internal
expansion tank, diaphragm-
type
27
Quick-fill valve, if used
28
DHW boiler water supply
connection, when used — see
page 13 for information
29
DHW boiler water return
connection, when used — see
page 13 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