Firing Rates And Corresponding Blower Speeds; Ignition Fan Speed - Weil-McLain ULTRA ULTRA-105 Service Manual

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GAS FIRED WATER BOILER SERIES
See Figure 25, page 42 for procedure to access Parameter settings.
Parameter explanations
Firing rates and corresponding blower speeds (low fire, ignition, and high fire) —
Low fire
Ignition
High fire
(adjust if desired to match maximum
system load — High fire % rate =
Max heat load / Boiler output)
3. Acceptable range (altitude up to 5,500 feet only):
Ultra-80 to 230:
display).
Ultra-310:
play).
Boiler display shows fan speed in 100's of rpm. A value of
48 would mean a speed of 100 x 48, or 4800 rpm.
4. Parameter 17 must be increased for
tions. See Figure 30, page 48 for required values.
5. Factory default — see Figure 30.
Ignition fan speed — parameter 19
1. Parameter 19 sets the fan speed during ignition. Boiler firing
rate is proportional to fan speed, so increasing the minimum
fan speed increases the minimum firing rate (low fire).
48
—
1 & 2
(continued)
>
Minimum (up to 5,500 feet)
fanspeed
(Factory default setting)
Minimum
fanspeed @
(over 5,500 feet)
Ignition fanspeed (up to 5,500 feet)
(Factory default setting)
Ignition fanspeed @
(over 5,500 feet)
Maximum fanspeed CH (parameter 13)
(Factory default setting)
Applies to
Maximum fanspeed DHW (parameter 14)
(Factory default setting)
Applies to
(13 to 52 on boiler
(14 to 58 on boiler dis-
applica-
80 105
RPM RPM
The ignition fan speed
the value in Figure 30). This would reduce boiler fir-
ing rate below the acceptable limit during ignition,
resulting in potential for severe personal injury,
death or substantial property damage.
2. Parameter 19 should
applications.
3. Acceptable range (up to 5,500 feet ONLY):
Ultra-80 to 230:
display).
Ultra-310:
play).
Boiler display shows fan speed in 100's of rpm. A value of
27 would mean a speed of 100 x 27, or 2700 rpm.
4. Factory default — see Figure 30.
155 230 310
RPM RPM RPM
as required for
(13 to 52 on boiler
(14 to 58 on boiler dis-
Part number 550-100-029/0810