Lochinvar KNIGHT 399 - Manual (Page 22)

1
Service
22
Service Manual
1
Service
Cascade offset
This parameter determines how much the temperature must
go above set point before the lead boiler will turn off. This
parameter can be adjusted by the installer by accessing
parameter H5. The default value is 9.9°F (5°C).
Cascade off-on differential
This parameter determines how much the temperature must
go below the turn off temperature (Set point + Offset) before
the lead boiler turns on. This parameter can be adjusted by
the installer by accessing parameter H6. The default value is
19.8°F (11°C).
I: Circulation pumps
System pump delay
The system pump delay parameter sets the length of time the
system pump (if connected) will run after a SH demand has
been satisfied. Setting the delay time to 0 will disable the
pump. This parameter is adjustable by the installer by
accessing parameter I1. The time range for this parameter is
0 minutes to 40 minutes. The default time is 30 seconds.
SH pump delay
The SH pump delay parameter sets the length of time the
boiler pump will run after a SH demand has been satisfied.
Setting the delay time to 0 will disable the pump. This
parameter is adjustable by the installer by accessing
parameter I2. The time range for this parameter is 0 minutes
to 40 minutes. The default time is 30 seconds.
DHW pump delay
The DHW pump delay parameter sets the length of time the
DHW pump (if connected) will run after a DHW demand
has been satisfied. Setting the delay time to 0 will disable the
pump. This parameter is adjustable by the installer by
accessing parameter I3. The time range for this parameter is
0 minutes to 40 minutes. The default time is 30 seconds.
J: Service Notification
Service notification in months
When the boiler control determines that a scheduled service
is due based on days of installation, the boiler display will
alternate the standard boiler display text with the message
SERVICE DUE every 5 seconds. This parameter is adjustable
by the installer by accessing parameter J1. The time range for
this parameter is 0 months to 36 months. The default time is
12 months.
Service notification running hours
When the boiler control determines that a scheduled service is
due based on the hours of actual operation, the boiler display
will alternate the standard boiler display text with the message
SERVICE DUE every 5 seconds. This parameter is adjustable
by the installer by accessing parameter J2. The time range for
this parameter is 0 hours to 100,000 hours. The default time
is 10,000 hours.
Service notification boiler cycles
When the boiler control determines that a scheduled service is
due based on the number of boiler cycles, the boiler display
will alternate the standard boiler display text with the message
SERVICE DUE every 5 seconds. This parameter is adjustable
by the installer by accessing parameter J3. The range for this
parameter is 0 cycles to 100,000 cycles. The default is 10,000
cycles.
Reset service notification counter
Once servicing has been completed, the service notification
counter should be reset. This parameter can be reset by the
installer by accessing parameter J4. Once accessed, press the
RESET key to reset the service notification counter.