Ultra Control Module Parameters; Default Parameter Settings; When To Change Parameters; Typical Parameter Changes - Weil-McLain ULTRA ULTRA-105 Service Manual

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GAS FIRED WATER BOILER SERIES
Overview of Ultra Control Module parameters

Ultra Control Module parameters

See information beginning on page 44 for detailed informa-
tion on all Ultra control module parameters.
Parameter descriptions
1. This section includes explanations of the adjustable parameters (begin-
ning on page 44).
Revise module parameters ONLY if you fully understand the
purpose and result of the changes. Tampering with control
settings can result in unreliable operation, with possible severe
personal injury, death or substantial property damage.
2. You will find additional information on parameters and control opera-
tion in the Ultra Control Supplement.

Default parameter settings

1. Figure 26, page 43 lists the factory default settings for all Ultra models,
for standard altitudes (up to 5,500 feet) and high altitude (over 5,500
feet).
2. When in doubt, always restore parameters to the default settings listed
in Figure 26, page 43.

When to change parameters

1. Factory default settings will work for most applications. There are situ-
ations for which changes are desirable or even mandatory:
2. Default boiler settings are satisfactory for most high-mass systems
(radiant slab, cast iron radiators, most finned-tube radiation).

Typical parameter changes

Outdoor reset applications
1. Outdoor reset operation can sometimes be improved by adjusting
parameters 4, 5, 6 and 7. Parameters 9, 10 and 11 might also be modi-
fied.
2. See page 44 for discussion of outdoor reset.
High altitude installations
1. Minimum fan speed (parameter 17) and ignition fan speed (param-
eter 9) MUST be changed for operation at altitudes over 5,500 feet.
2. See the High Altitude Kit instructions for details. Change these param-
eters following the High Altitude instructions. If revising the parameters,
use ONLY the values given in Figure 26, page 43.
3. Also see page 47 for further discussion of fan speed parameters.
Part number 550-100-029/0810
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1 & 2
Fan-coil systems
1. Systems using fan coil units respond to heat input
rapidly, and may require larger differential settings
for best performance.
2. See page 49 for discussion of control differential and
how to adjust.
High-mass systems
1. High-mass systems, such as in-slab radiant and cast
iron radiator systems, respond slowly to heat input.
The factory default settings will work well for most
of these applications.
DO NOT Change the following:
Parameter 2
Parameters 13 & 15
Parameters 17 & 19
Parameters 24, 25, 26 & 27
Parameter 32
Parameter 33
tions.
Parameter 34 – first digit
Parameter 34 – second digit
AM-4. With AM-4, set second digit to 4 (0 - 10 V
analog on AM-4: capacity).
Parameter 35 – both digits
Parameters 37, 39, 40 & 41
Parameter 42 – first digit
Failure to comply with the following could
cause equipment performance problems,
resulting in potential severe personal
injury, death or substantial property dam-
age.
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