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P/N 42-9534 8/08 Copyright 2008 Hydrotherm
KN-SERIES GAS-FIRED DIRECT VENT CAST IRON BOILERS – CONTROL MANUAL
Menu item
Under . . .
Explanation
DELTA TEMP
PUMP OPTIONS
LOCAL PUMP
When DELTA ENABLE (above) is set to “ON,” the boiler pump will run until the temperature
diff erence across the boiler is less than DELTA TEMP. (The pump will run an additional time
equal to the PURGE TIME.) An inlet temperature sensor is required.
POST PRGE TIME
PUMP OPTIONS
LOCAL PUMP
The boiler pump can run after boiler shutdown to distribute heat remaining in the boiler
water. POST PRGE TIME sets how long the boiler pump will run. (Also see DELTA TEMP, above.)
NOTICE: For systems that shut off fl ow valves (such as zone valve systems) when the call for
heat is satisfi ed, this option must be set to “0” to prevent dead-heading the pump.
ALWAYS ENABLED
PUMP OPTIONS
LOCAL PUMP
If ALWAYS ENABLED is set to “YES,” the boiler circulator never turns off .
MASTER PUMP/VALVE
REMAINS ON:
PUMP OPTIONS
PUMP/VALVE
OPTION
If set to “ON,” the master control in the network will keep its pump contacts closed (running
its pump and/or control valve) if no other boilers are operating. This is used to prevent dead-
heading system fl ow.
FLOW PROVE
PUMP OPTIONS
FLOW PROVE
This is the time allowed for fl ow to prove (closure across the J11B “WTR FLW” terminals. It can
be increased to allow time for slow-opening valves to open.
SETBACK ENTRY
NIGHT SETBACK
Setback entry is the designator for the setback operation. Up to four (4) setback operations
can be programmed.
ENTRY IS
NIGHT SETBACK
Select “ON” to enable a setback operation. Then program the times, days and setpoint. The
setpoint assigned will override the
KN
control’s setpoint when setpoint is controlled locally. It
will not override 4-20ma control or building management control.
SETBACK
NIGHT SETBACK
This is the reduction in local (or system) setpoint temperature during the specifi ed period.
SETBACK TIME
NIGHT SETBACK
Enter the start and end days and the times for start/end.
TEMP SCALE
OPTIONS
Select Fahrenheit or Centigrade.
KEY CLICK
OPTIONS
If activated, the control beeps when a key is pressed.
SKIP PASSWORD
OPTIONS
The control can be programmed such that a password is required to change settings.
Setting this to “ON” disables the password. If SKIP PASSWORD is OFF, then a password is
required to enter the setup menus.
Default password = AAAAAA (Restore to default by pressing
while turning ON/OFF
switch to ON.)
Password must be 6 characters long — the control will not accept blank characters.
BRIGHTNESS
OPTIONS
Adjust the brightness of the display.
RUN HRS
LOG/RUNTIME
Displays the total time the boiler gas valve has been open.
DATA LOG ENTRY
LOG/RUNTIME
Displays the current entry in the data log (see Figure 12, page 41).
SIZE
LOG/RUNTIME
Displays the current number of entries in the data log.
BOILER CYCLES
LOG/RUNTIME
Displays the number of times the boiler gas valve has been cycled on, then off . It does not
include failed ignition attempts.
Table 9
Setup menus — parameter explanations (continued)
Control menus and adjustments
(continued)
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