Weil-McLain Ultra Manual page 61

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gas fired water boiler
U-Control operation and setup
Low-temperature systems
NOT
use the Ultra boiler control as the only means of
water temperature regulation for low-temperature sys-
tems if higher-temperature systems are also supplied.
EXPRESS SETUP — using default settings
1. The U-Control is factory programmed to supply a DHW circuit
(control priority 1) and finned tube baseboard space heating (con-
trol priority 2). Control priority 3 is also available, and preset to
run all three circulators if desired.
Figure 82
Factory default settings
Priority For Target temperature
1 DHW
2 Finned 180°F fixed (if no outdoor sensor) or
tube BB 180°F at 0°F outside / 130°F at 70°F outside
3 Space 180°F fixed (if no outdoor sensor) or
heating 180°F at 0°F outside / 130°F at 70°F outside
2. You can use the factory default settings for most systems supply-
ing space heating with finned-tube baseboard with or without a
DHW tank, provided:
a. A DHW tank, if used, must be piped directly to the boiler, as in
the piping shown in Figure 15, page 17 or Figure 17, page 19.
If the DHW tank is a separate zone off of the system main, or
if it is piped as in Figure 16, page 18, you will need to enable
additional circulators for DHW operation. The U-Control
is factory programmed to operate only the DHW circulator
during DHW heating.
b. The heat emitters in the system must be finned tube baseboard
only. Other heat emitters require changes in the U-Control
setup.
3. To use the factory default settings:
a. Wire the DHW tank aquastat to the U-Control "heat demand 1"
input, terminals P11 #4 and #5.
b. Wire the space heating thermostat (or zone controller or zone
valve end switches) across the U-Control "heat demand 2"
input, terminals P15 #1 and #2.
c. Attach a sensor (supplied with boiler) to the system supply
pipe and wire to terminals P14 #1 and #2.
d. Attach a sensor (supplied with boiler) to the system return pipe
and wire to terminals P14 #2 and #3.
e. If you want to use outdoor reset for the space heating circuits,
install the outdoor temperature sensor (supplied with boiler)
and wire to terminals P10 #1 and #2.
f. Wire the boiler circulator (supplied with boiler) as circulator 2,
following instructions on page 54.
g. Wire the DHW circulator (supplied by installer) as circula-
tor 1, following instructions on Connect the boiler circulator
(supplied with boiler) as circulator 2, following instructions
on page 54.
h. Wire the system circulator (supplied by installer) as circulator 3,
following the instructions on page 54.
Part number 550-100-066/0608
— Boiler Manual
(radiant slab, etc.) —
Circulators
enabled
190°F #1 Only
#1 and #2
#1, #2 and #3
(continued)
ADVANCED SETUP – OVERVIEW
DO
1. Access contractor menus by pressing and holding the
UP and DOWN arrow keys for 5 seconds.
2. The contractor screen will show:
a. BOILER SETTINGS
b. SYSTEM SETTINGS
c. DIAGNOSTICS
d. MAINTENANCE INFO
e. SET DATE AND TIME
3. Navigate through the menus as shown in
ure 85, page 64. For a description of each of the menu
options, see Figure 86, page 66.
4. You will need to adjust settings as required for the
systems supplied by the boiler and connect the wiring
accordingly.
ADVANCED SETUP – BOILER SETTINGS
BOILER MODEL
Check the
listed on the boiler's rating plate. Change the
selection to the correct model if not. Also
verify the model number on the U-Control
display at power-up. Failure to correct could
result in severe personal injury, death or sub-
stantial property damage.
HIGH ALTITUDE
If the boiler is installed at an altitude above
5,500 feet, select YES for high altitude. The U-
Control will automatically adjust firing rates
(blower speeds) to compensate for altitude.
WWSD
1. WWSD stands for "warm weather shutdown." It means
the boiler will not be allowed to fire if the outside tem-
perature is greater than the WWSD setting.
2. When the boiler is kept off because the outside tem-
perature is above WWSD, the graphic display will
show "WWSD," and the boiler will remain in standby
until the outside temperature drops below WWSD
temperature.
3. WWSD does not apply to DHW systems.
4. The outdoor sensor must be installed to use this func-
tion.
ADJUST OUTDOOR
1. Use this setting to adjust the outdoor sensor temperature
to account for solar or other effects that would cause the
sensor to read incorrectly.
ADDITIONAL HEAT DEMAND
1. This setting is for multiple boilers or multiple heating
sources (an Ultra boiler collaborating with a heat pump
or a different boiler, for examples).
2. For Type 4 boilers, this function only applies to the
Priority 1 system.
boiler model
against the model
Fig-
61