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WM97+
-
gas
fired water boiler
EXPRESS SETUP — using default settings
MANDATORY CONTROL SETTINGS
following settings must be checked and adjusted
if necessary: BOILER MODEL and HIGH AL-
TITUDE in BOILER SETTINGS menu. Also
enter information at the MAINTENANCE INFO
screen. See instructions on the following pages
for menu access and control settings.
The WM97+ control is factory set to supply three zones of
1.
space heating ONLY. Control settings must be changed
to operate a DHW circuit
2. All zones use the same temperature settings (or outdoor reset
curve if outdoor sensor is connected — see page 133).
3. The terminal units in the system must be finned tube base-
board only. (Other terminal units require changes in the
WM97+ control setup.)
4. The control is set up to accept up to three inputs from zone
thermostats or end switches.
5. The WM97+ control will regulate boiler outlet water tem-
perature as follows:
a. Outdoor sensor installed (see page 133):
180°F at 0°F outside temperature
130°F at 70°F outside temperature
b. Outdoor sensor not installed (see page 133):
180°F fixed target temperature
zoned with circulators
6. If the system is
in Figure 79 and guidelines below the illustration.
zoned with zone valves
7. If the system is
ure 80, page 70 or Figure 81, page 70 Figure 79 and guidelines
below each illustration.
Use Figure 81, page 70
limitations given on page 44 and page 45. Install a
system circulator when applying Figure 80, page 70.
Failure to comply could cause system problems.
1. Wire the circulator outputs (CIRC 1, CIRC 2 and CIRC 3)
to the zone circulators. See Figure 75, page 65.
2. Wire the zone thermostats to the Zone 1, Zone 2 and Zone 3
inputs on the 24-VAC terminal strip. See Figure 76, page 66.
1
WM97+ boiler
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 39
6
Isolation valves
8
Supplementary expansion
tank, diaphragm type, if used
Part number 550-142-120/0113
— Boiler Manual
— The
.
, follow the guidelines
, follow Fig-
ONLY
if the system meets the
Legend and guidelines — Figure 79
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
14
Primary/secondary by-
pass valve — see page 40 or
page 41 for information —
OPEN: Boiler connected as
primary/secondary
Figure 79
Using default control settings (
CIRCULATOR-zoned systems
primary/secondary piping
The piping shown is adapted from Fig-
ure 55, page 48,
The WM97+ control settings would have to be
changed to allow DHW operation. Follow all
appropriate instructions on page 48.
20 Make-up water supply
23 Backflow preventer, if used
24 Zone circulators
25 Pressure reducing valve, if
used
26
Internal expansion tank,
diaphragm-type
27 Quick-fill valve, if used
28 Install pipe cap supplied with
boiler (see Figure 7, page 13)
)
No DHW
without DHW connected
27 Install drain valve supplied
with boiler (see Fig-
ure 7, page 13)
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
– 69 –
.
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