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P/N 42-9534 8/08 Copyright 2008 Hydrotherm
KN-SERIES GAS-FIRED DIRECT VENT CAST IRON BOILERS – CONTROL MANUAL
Control menus and adjustments
(continued)
6
Calibration of fi ring rates (blower speeds)
Th is section describes use of the
KN
HeatNet control to set blower speeds for mini-
mum input (MIN OUTPUT), maximum input (MAX OUTPUT) and pilot ignition
period (IGNITION).
Follow all instructions in the
KN
Series Gas Boiler Installation and
Operation Instructions manual to install and adjust the boiler before
proceeding with any of the procedures below. Failure to comply could
result in severe personal injury, death or substantial property damage.
Entering calibration mode
Electrical shock hazard — Use caution when working around electrical
components in the boiler. Exposed line voltage electrical connections
could cause a severe shock. Failure to comply could result in severe
personal injury or death.
Turn off all call for heat inputs or disconnect wires, if necessary, to ensure there are
not heat calls during the procedures.
Disconnect the HeatNet cable from the boiler if necessary to ensure there is no call
for heat from the MASTER boiler.
Turn the boiler ON/OFF switch to ON.
Open the boiler front door and locate the control board.
Find the calibration switch, located on the lower left corner of the control board. It
is labeled, “NORM” and “CAL.”
Figure 11
Calibration switch (on lower left corner of control board) —
shown with reduced board component detail for clarity
Slide the calibration switch to the right to “CAL.”
Calibration mode display
Th e
KN
HeatNet control is now in calibration mode, and will show “CALIBRA
TE”
on the display.
Th e fi rst screen will show the following. Th
e value shown for temperature is the
SYSTEM (or LOCAL) setpoint. MEMBER boilers will show LOCAL SET in-
stead of SYSTEM SET.
S T A N D B Y
S Y S T E M
S E T
C A L I B R A T E
1 8 0
o
F
Press the DOWN key to navigate through the following displays.
1.
2.
3.
4.
5.
1.
1.
2.
3.
S T A N D B Y
D E L T A
T E M P
C A L I B R A T E
1 8 0
o
F
Th is screen is for display only, and shows the sett ing for DELTA
TEMP (see SETUP instructions on previous pages).
S T A N D B Y
P I D
C A L I B R A T E
1 8 0
o
F
Th is screen is for display only.
S T A N D B Y
M A X
O U T P U T
C A L I B R A T E
1 0 0 %
Press SELECT to change the value. Th e number will begin fl ash-
ing. Use the arrow keys to change. Th en press SELECT to save
the sett ing. Th e value is saved when the number stops fl ashing.
S T A N D B Y
I G N I T I O N
C A L I B R A T E
3 0 %
Press SELECT to change the value (IGNITION rate must be
between 20% and 40%.). Th e number will begin fl ashing. Use
the arrow keys to change. Th en press SELECT to save the set-
ting. Th e value is saved when the number stops fl ashing.
S T A N D B Y
M I N
O U T P U T
C A L I B R A T E
2 0 %
Press SELECT to change the value. (Minimum must be at least
20%.) Th e number will begin fl ashing. Use the arrow keys to
change. Th en press SELECT to save the sett ing. Th e value is
saved when the number stops fl ashing.
Additional screens follow, and show information only for:
SUPPLY (supply temperature value) and HEADER (header
temperature value).
When a sett ing is blinking, you have 5 minutes
to change the value with the arrow keys, or the
control will restore the original value and stop
blinking.
Slide the calibration to NORM to return the boiler to normal
operation. Reconnect wires as needed.
4.
