Slant/Fin CHS-399 - Manual (Page 28)

Slant Fin Corp.
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Controller and Display CHS Series
26
2.4.5 Modulation Config
Figure 2-24 Modulation Configuration Screen
Modulation Config – menu screen, accessed by
selecting “Modulation Config” from the “Advanced
Setup” screen, allows for adjustment of the min. and
max. modulation rates of the boiler. Use the up and
down (▲▼) buttons to navigate the menu options;
when the desired option is highlighted select by
pressing the “OK” button.
Modulation rates are listed by model number:
CH and DWH
Max Modulation Rate
Min Modulation
Rate
CHS-85 = 6300
CHS-110 = 7000
CHS-155 = 3700
CHS-175 = 4100
CHS-200 = 4650
CHS-250 = 5900
CHS-300 = 5000 (4800 on LP)
CHS-399 = 6900 (6600 on LP) 85 = 1525
110 = 1625
155 = 900
175 = 900
200 = 900
250 = 900
300 = 1500
399 = 1500
Table 2-18 Modulation Configuration Parameters
Parameter Description Factory Settings
CH max
modulation rate * Maximum permissible blower speed during CH demand [CH1 or CH2 (LL)].
Range is model dependent.
Model dependent
DHW max
modulation rate * Maximum permissible blower speed during DHW demand. Range is model
dependent.
Model dependent
Min modulation
rate *
Minimum permissible blower speed. Range is model dependent. Model dependent
* = Password protected
CH max modulation rate
DHW max modulation rate
Min modulation rate
7000 RPM
7000 RPM
1625 RPM
Modulation Config