Ch Config - Outdoor Reset Config - Slant/Fin CHS-85 Instructions Manual

│Controller and Display
Slant Fin Corp.

2.4.1.2 CH Config - Outdoor Reset Config

(CH Config) Outdoor Reset Config – sub-menu
screen, allows the installer to set parameters specific
to the effect the outdoor temperature has on the
operation of the boiler during local (i.e. non Lead
Lag) Central Heat demands. Use the up and down
(▲▼) buttons to navigate the menu options; when
the desired option is highlighted select by pressing the
"OK" button.
Outdoor Reset is in effect only if the following two
conditions are met: "Outdoor reset" is set to "Enable",
and an outdoor temperature sensor is connected to the
boiler. The "Outdoor Reset Config" parameters,
together with the "CH Config" parameters, define the
relationship of boiler temperature setpoint to outdoor
temperature. Refer to Figure 2-12 for an example of
the relationship between outdoor temperature and
boiler temperature, with a given set of settings.
Table 2-7 Outdoor Reset Configuration Parameters
Parameter Description
Outdoor reset
Enables or disables Outdoor reset
enable
Outdoor temperature that corresponds to the "Low water temp" setting. Example:
If the "Low water temp" setting is 95°F, and the "Max outdoor temp" setting is
Max outdoor
temp 70°F, the boiler setpoint will be 95°F when the outdoor temperature is 70°F or
higher. Range 50°F to 95°F
Design Temperature - Outdoor temperature that corresponds to the "CH
setpoint" setting. Example: If the "CH setpoint" is 180°F, and the "Min outdoor
Min outdoor
temp" setting is 0°F, the boiler setpoint will be 180°F when the outdoor
temp
temperature is 0°F or lower. Range -40°F to 40°F
Minimum boiler setpoint; occurs when the outdoor temperature is equal to or
Low water temp
greater than the "Max outdoor temp". Range 60°F to 140°F
Outdoor boost
Read only – functional in future revisions.
max off point
12
Figure 2-10 Outdoor Reset Configuration Screen
Figure 2-11 Outdoor Reset Graph
Point defined by:
Min outdoor temp= 0ºF
Point defined by:
Max outdoor temp= 70ºF
Outdoor Reset Config
Outdoor reset
Max outdoor temp
Min outdoor temp
Low water temp
Outdoor boost max off point
CHS Series
Enable
o
70 F
o
0 F
o
95 F
o
130 F
Factory Settings
Enabled
70ºF
0ºF
95ºF
130ºF