APPENDIX A
HeatNet Control REV 1.38-1
Page 76
WTR FLW LOCAL:
Once the HeatNet series boiler receives a call for heat, it
closes the LOCAL PUMP/VALVE relay. It then waits 10
seconds or more (adjustable) to prove flow. If there is no
flow, the flow switch alarm will be set. Every 10 seconds
the circulator pump relay will cycle ON for 10 seconds and
then OFF for 10 seconds to try and establish flow. The
interlock connection is located on J5B, WTR FLW.
IGNITION CTRL ALARM:
The ignition control alarm is displayed if the ignition
control detects a fault. This could be a flame failure, air
proving switch, or other fault associated with the ignition
control. When this fault occurs, you will need to refer to the
ignition control for the reason.
COMBUST AIR DAMPER:
If the combustion air damper has been selected for use
(AUX FUNCTIONS), and the proof switch does not make,
this fault will be displayed.
When the master boiler receives a call for heat and needs to
start a boiler, the DAMPER relay closes on J13. If the
combustion air damper does not prove within the proof time
specified in the combustion air damper menu, the boiler will
not start and then display the fault. A combustion damper
fault on a boiler can only be cleared by power cycling.
OPEN ******* SENSOR :
If the open sensor fault is displayed, the sensor in the
position reported was originally detected, but has since
opened. The boiler will shut down on any OPEN sensor
except the OUSTSIDE AIR sensor.
SHORTED ******* SENSOR:
If the shorted sensor fault is displayed, the sensor in the
position reported was originally detected, but has since
shorted. The boiler will shut down on any SHORTED
sensor except the OUSTSIDE AIR sensor.
DELTA TEMPERATURE WARNING:
If the temperature difference across the boiler measured
from RETURN water to SUPPLY water exceeds 40F this
message will be displayed. This can be set to an alarm
condition in the AUX FUNCTIONS menu. High delta
temperatures can result in damage to the boiler.
RETURN TEMPERATURE WARNING:
If the RETURN water temperature is less than 130F
(condensing) this message will be displayed. Return
temperatures less than 130F with the boiler running can
cause condensation of the flue gases. Condensation of flue
gases will damage the heat exchanger. Low return
temperatures for an extended period of time can result in
damage to the boiler.
Содержание Smith Series
Страница 33: ...WIRING CONNECTIONS HeatNet Control REV 1 38 1 Page 33 Wiring Connections Figure 26 Power Connections...
Страница 65: ...OPERATION HeatNet Control REV 1 38 1 Page 65 Smith Series Run Screen...
Страница 68: ...OPERATION HeatNet Control REV 1 38 1 Page 68 Smith Series Menu Tree Version 1 38...
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