Instruction manual
44
P/N HN-IOM-1 82-0331 Copyright 2009 Mestek, Inc.
Finned copper tube gas boilers & water heaters – Control manual
Control menus and adjustments (continued)
7
Calibration of firing rates (blower speeds)
is section describes use of the HeatNet control to set blower speeds for minimum
input (MIN OUTPUT), maximum input (MAX OUTPUT) and pilot ignition pe-
riod (IGNITION).
Follow all of the instructions in the 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 o all call for heat inputs or disconnect wires, if necessary, to ensure there are 1.
not heat calls during the procedures.
Disconnect the HeatNet cable from the boiler if necessary to ensure there is no call 2.
for heat from the MASTER boiler.
Turn the boiler ON/OFF switch to ON.3.
Open the boiler front door and locate the control board.4.
Find the calibration switch, located on the lower le corner of the control board. It 5.
is labeled, “NORM” and “CAL.”
Calibration switch (on lower left corner of control board) — Figure 11
shown with reduced board component detail for clarity
Slide the calibration switch to the right to “CAL.”6.
Calibration mode display
e HeatNet control is now in calibration mode, and will show “CALIBTE” on 1.
the display.
e rst screen will show the following. e value shown for temperature is the 2.
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.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
is screen is for display only, and shows the seing 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
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. e number will begin ash-
ing. Use the arrow keys to change. en press SELECT to save
the seing. e value is saved when the number stops 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%.). e number will begin ashing. Use
the arrow keys to change. en press SELECT to save the set-
ting. e value is saved when the number stops 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%.) e number will begin ashing. Use the arrow keys to
change. en press SELECT to save the seing. e value is
saved when the number stops ashing.
Additional screens follow, and show information only for: SUP-
PLY (supply temperature value) and HEADER (header tem-
perature value).
When a seing 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 nor-4.
mal operation. Reconnect wires as needed.