WIRING CONNECTIONS
HeatNet Control V3
Page 80
Status Screen Fault Display
There are numerous interlock switches and software limits that are detected. Each of these, when tripped will produce a display
message, an audible beeping, and an alarm relay closure. The fault is displayed first, then after a second, the time the fault
occurred is displayed. This cycle will keep occurring until the fault is cleared.
These faults and interlocks are:
HIGH LIMIT:
When the high limit aquastat trips the following message is
displayed:
The high limit interlock breaks power to the ignition control
(shutting it off) and effectively removes any chance of the
gas valve receiving power. The HeatNet series control will
remain powered to display the fault, latch the alarm
relay/audible beeper, and to access the log. The interlock is
located on J5, HIGH LIMIT. Ensure power is present on the
input to the High Limit Control.
SPARE 4:
This is a reserved interlock input that is user defined. The
interlock is located on J5B, SPARE 4.
DELTA TEMPERATURE WARNING:
If the temperature difference across the boiler measured
from RETURN water to SUPPLY water exceeds the
EXCHR DELTA T RANGE, setting this message will be
displayed.
LOW WATER CUTOFF:
If there is a low water condition reported by the low water
cutoff switch this fault is displayed. Check that there is
water flow and water in the boiler. There is a reset switch
located on the LWCO box. The interlock connection is
located on J5B, LWCO.
VAR FREQ DRIVE:
The variable frequency drive, which controls the blower, if
supported, reports this fault. It may be caused in the event of
over current or an internal VFD fault that would cause it to
shut down. If this is the case, check the fault indicators on
the VFD. The interlock is located on J5B, VFD.
GAS PRESSURE:
The gas pressure switches (high pressure and low pressure)
are connected in series, so if either trip, a fault will be
reported here. A reset switch is located on the gas pressure
switches. The interlock is located on J15B, GAS PR.
Summary of Contents for FUTERA XLF Series
Page 27: ...CONTROL METHODS HeatNet Control V3 Page 27 Figure 25 Base loading relay...
Page 67: ...WIRING CONNECTIONS HeatNet Control V3 Page 67 Figure 49 Jumper Dip Switch Locations...
Page 73: ...WIRING CONNECTIONS HeatNet Control V3 Page 73 Figure 57 Temperature sensors...
