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Part number 550-100-400/0119
99
U-Control operation and setup — advanced
(radiant
slab, etc.) — 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.
ADVAN CED 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 Fig-
ure 115, page 102 . For a description of each of the
menu options, see Figure 116, page 104 .
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
Check the against the model
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.
If the boiler is installed at an altitude
above 5,500 feet, select YES for high
altitude. The U-Control will automati-
cally adjust fi ring rates (blower speeds)
to compensate for altitude.
1. WWSD stands for “warm weather shutdown.” It
means the boiler will not be allowed to fi re 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.
4. The outdoor sensor must be installed to use this
function.
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.
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.
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, it be-
gins 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 “Additional heat demand contact,” ter-
minals P16 #6 and #7. Use this contact to start the
next heat source.
c. If the next heat source is an Ultra boiler, connect 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 fi re multiple boilers.
5. Type 2 — This means the boiler is the secondary heat
source.
a. When the U-Control receives a call for heat, it im-
mediately 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 satisfi ed.
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 additional 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 satisfi ed before the timer runs
out, the next boiler is not started.
e. Connect these output terminals to the SHADOW
boilers’ 0–10 VDC input terminals, P15 #5 and #6.
The SHADOW boilers will start and modulate based
on the signal strength. The SHADOW boilers must
be set up as Type 4 (see below). They do not need
their additional heat timers to be setup.
®
Series 4
gas-fired water boiler — Boiler Manual
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