Installation Guide
Part number 550-100-066/0608
g a s -f i r e d w at e r b o i l e r — Boiler Manual
66
U-Control operation and setup (continued)
Boiler Model
80, 105, 155,
230, 310
factory
. Adjusts blower speeds
and flame sense (Display will show “HA” after the model number if high altitude has been
selected, below.)
High Altitude
yes or no no Adjusts ignition and low fire fan speed (for altitudes above 5, 500 feet only)
WWSD Temp
°F Off, 50 100 70 Boiler will not respond to heating calls above this outdoor temp
Adjust Outdoor
°F
(difference)
-10 +10 0 This value plus outdoor sensor reading equals outdoor temp (Use this setting to
compensate for solar gain or other factors that cause a shift in sensor temperature.)
Add’l Heat Demand Type
Ty p e s Off Type 4 Off Type 1 — Ultra is primary source, starts secondary after delay (requires system sensors)
Type 2 — Ultra is secondary source, starts primary immediately
Type 3 — Boilers operate in parallel, Ultra boiler is master, outputs 0–10 VDC to others
Type 4 — Boilers operate in parallel, Ultra boiler is slave, receives 0–10 VDC input
Add’l Heat Demand Time
minutes 0 240 0 Delay before bringing on additional heating appliances
System Type
Ty p e s Off Custom DHW - direct DHW-direct doesn’t use ODR, boost, or Add’l heat demand output
Max Supply
°F 60 190 190 Boiler enters manual reset lockout at 200°F
Min Supply
°F 60 190 N/A N/A - DHW does not use reset
Max OD Reset
°F 50 100 N/A N/A - DHW does not use reset
Min OD Reset
°F –20 50 N/A N/A - DHW does not use reset
Modulate On Diff
°F 2 10 5 Boiler turns on if temperature drops below target minus differential on
Modulate Off Diff
°F 2 10 5 Boiler shuts down if modulates past target plus differential off
Max On Time
minutes off 240 30 Longest time boiler will satisfy this system before switching to an active lower priority
Min On Time
— — — — Priority 1 does not have this setting
Boost Interval
minutes off 240 N/A
(not used) When operating on ODR increases target 10F when this time expires until reaching MAX
Postpump Time
seconds off 240 30 Circulator run time after call for heat ends
Circulator 1
on-off off on on Circulator activates on this call for heat if on
Circulator 2
on-off off on off Circulator activates on this call for heat if on
Circulator 3
on-off off on off Circulator activates on this call for heat if on
Maximum Rate
%Rate Ignition Rate 100% 96% Boiler Model and altitude specific (derated to 96% from factory)
Minimum Rate
%Rate 20% Ignition Rate 20% Boiler Model and altitude specific
System Type
Ty p e s FTB Finned-Tube Baseboard
Max Supply
°F 60 190 180 Highest target the control will calculate based on outdoor temperature
Target temperature if outdoor sensor is not detected
(manual reset lockout at 200°F)
Min Supply
°F 60 190 130 Lowest target the control will calculate based on outdoor air temperature
Max OD Reset
°F 50 100 70 Outdoor air temperature that forces the minimum supply water to be target temperature
Min OD Reset
°F –20 50 0 Outdoor air temperature that forces the maximum supply water to be target temperature
Modulate On Diff
°F 2 10 5 Boiler turns on if temperature drops below target minus differential on
Modulate Off Diff
°F 2 10 5 Boiler shutsdown if modulates past target plus differential off
U-Control setup options (see Figure 85, page 64 for location in menu sequence)