U-Control Operation And Setup - Advanced - Weil-McLain Ultra 3 series User Manual

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gas fired water boiler
U-Control operation and setup — advanced
Low-temperature systems
slab, etc.) — DO NOT use the Ultra boiler
control as the only means of water tem-
perature regulation for low-temperature
systems if higher-temperature systems
are also supplied.
ADVANCED SETUP – OVERVIEW
1. Access contractor menus by pressing and holding
the UP and DOWN arrow keys at the same time
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 102, page 86. For a description of each of the
menu options, see Figure 103, page 88.
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
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 substantial 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 automati-
cally 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 temperature is greater than the WWSD
setting.
2. When the boiler is kept off because the outside
temperature 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.
Part number 550-100-090/0809
— Boiler Manual
(radiant 4. The outdoor sensor must be installed to use this
function.
ADJUST OUTDOOR
1. Use this setting to adjust the outdoor sensor tem-
perature 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 heat-
ing 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.
3. OFF — Function disabled.
4. Type 1 — This means the Ultra boiler is the primary
heat source.
a. When the Ultra boiler receives a call for heat,
Fig-
it begins its startup sequence and also starts a
delay timer (set as ADD'L HEAT DEMAND
TIME).
b. When the delay timing is reached, the U-
Control closes the the "Additional heat demand
contact," terminals P16 #6 and #7. Use this
contact to start the next heat source.
c. If the next heat source is an Ultra boiler, con-
nect this contact to the boiler's "heat demand 1"
terminals (P11 #4 and #5). Program the second
boiler's delay timer to start a third boiler the
same way, and so on to sequentially fire mul-
against the model
tiple boilers.
5. Type 2 — This means the boiler is the secondary
heat source.
a. When the U-Control receives a call for heat,
it immediately activates the "Additional heat
demand contact," terminals P16 #6 and #7.
This contact is used to start the next heat source
immediately.
b. When the delay timing is reached, the Ultra
boiler begins its startup sequence and continues
to heat until the demand is satisfied.
c. Type 2 assignment would generally only be used
if the other heat source is a different boiler or a
heat pump, for example.
6. Type 3 — This assigns the boiler as the LEAD boiler
in a multiple boiler system.
a. This LEAD boiler must have system supply and
return sensors mounted on the system supply
and return pipes and wired to the boiler.
b. When the U-Control receives a call for heat, it
begins its heating sequence and starts the ad-
ditional heat demand delay timer.
c. When the delay timing is reached, the U-
Control sends a 0–10 VDC proportional signal
out its 0–10 VDC output terminals, P16 #1
and #2.
d. If the heat demand is satisfied before the timer
runs out, the next boiler is not started.
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