DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS
HeatNet Control V3
Page 114
OPTION:
NONE
NONE
DUAL FUEL
BASE LOAD
When set to DUAL FUEL, input T3/ RESERVED, OPTION input
is used to control the DUAL FUEL OPTION relay via K8 contacts
on J4.2 &.6. When set to NO OPTION the input T3/RESERVED,
OPTION relay K8 on J4.2 &.6 is inactive.
When set to BASE LOAD, the Option Relay K8 on J4.2 &.6 is used
as an enable contact for a base load boiler. The J4.1 &.5 0-10vdc/4-
20 mA output is used to modulate the base load relay if it is of the
modulating type.
The limitation of the OPTION menu is that Dual Fuel cannot be
used with a Base Load boiler.
BLOWER SETTINGS
(AMETEK BLOWER)
BUTTON
ACCELERATE
3.0 %/s
0.1
– 10.0 %/s
If a signal is sent to increase the blower rpm, the blower’s
acceleration speed will change at this rate until its rpm is equal to
the signal sent. % per second. Setting this value too high may cause
overshooting of the blower rpm and temporarily over firing of the
boiler. Setting this too low will slow down the response of the boiler
to get to setpoint.
DECELERATE
3.0 %/s
.1
– 8.0 %/s
If a signal is sent to decrease the blower rpm, the blower’s
deceleration speed will change at this rate until its rpm is equal to
the signal sent. % per second. Setting this value too low will slow
down the response of the boiler to get to setpoint. Setting this value
too high may cause undershooting of the blower rpm and
temporarily dropping below low fire of the boiler (Due to this
condition, the deceleration rate is automatically decreased as the
rpm approaches low fire).
SOFT START:
2 Seconds
2
– 4 Seconds
In order to start the Ametek blower, the control signal must be
applied to start the blower at a low rpm. If the low speed start time
is too low the Ametek blower may not start and lock out with its
current limit. This may result in the need for the boiler to be
recycled. If this is to be avoided, the Stage 4 relay may need to be
wired to the Ametek Blower’s contactor. Doing this will allow (3)
attempts to restart the blower every 10 minutes. If the time is too
high, pre-purge time of the blower is lost.
OFF BOILER
–
BLOWER
0
0 - 50 %
Setting this value to any value other than 0, will run the Blower at
this percentage when the boiler is OFF. This is primarily used to
maintain a positive pressure in the vent pipe in extreme situations.
