Magikist HWG20 Instruction Manual Download

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6.2 POWER INDICATOR

The power-up state to the heater and the

AFE

control is indicated by the buzzer sounding and

the temperature setting displaying 888 for 1
second. Following power-up, the POWER
indicator on the

AFE

control should remain

on.

6.3 HEAT ON INDICATOR

For electronic ignition (HSI) heaters the HEAT ON
indicator on the

AFE

control indicates that

the SmartValve gas valve has provided positive
feedback that the intermittent pilot is lit and the
main section of the gas valve is open.

For standing pilot heaters the HEAT ON indicator
simply follows the on and off action of the
REQUEST FOR HEAT indicator.

6.4 REQUEST FOR HEAT INDICATOR

The REQUEST FOR HEAT indicator on the

R O

A F E

control indicates whether all

conditions have been met to request that heat be
turned on. The conditions required to request for
heat are flow on, thermostat call for heat, external
control on, flue status good, damper is open,
power venter is on, and purge delay is off.
Essentially if the six indicators FLOW ON,
THERMOSTAT, EXTERNAL CONTROL, FLUE
STATUS, DAMPER OPEN, and POWER
VENTER ON are all on, and PURGE DELAY ON
indicator is off, then REQUEST FOR HEAT will
turn on. Should any of the six indicators turn off,
then REQUEST FOR HEAT will turn off as well.

6.5 PURGE DELAY ON INDICATOR

The PURGE DELAY ON indicator on the

AFE

control indicates that the heater is currently in

a purge delay. The purge delay is intended to
provide a delay to eliminate rapid on/off cycling of
the gas valve.

The purge delay occurs when there is an end to
the current request for heat and the REQUEST
FOR HEAT indicator turns off. At this point the
PURGE DELAY ON indicator turns on and
remains on for a period of six seconds. During this
period if all conditions required to request for heat
are met, the REQUEST FOR HEAT indicator will
not turn on. If the conditions required to request
for heat remain, the REQUEST FOR HEAT
indictor will turn on once the purge delay is over
and the PURGE DELAY ON indicator turns off.

6.6 FLOW ON INDICATOR

The FLOW ON indicator on the

AFE

control indicates whether there is water flow
through the heater or not. If the indicator is on
then there is water flow through heater. If the
indicator is off then there is no flow of water
through the heater.

If the FLOW ON indicator is flashing slow, the

AFE

control is indicating a warning that

there is water flow through the heater and that it
has been continuous for at least 10 minutes. This
warning is strictly for information purposes as it
may indicate a problem with the flow switch, since
the wash gun in high pressure washing
applications is typically not held open continuously
for 10 minutes.

If the wash gun is held open continuously for more
than 10 minutes in your operation, or your heater
is being used in a different application where
water flows through the heater continuously for
more than 10 minute periods, then simply
disregard the flashing FLOW ON indicator. If,
however, the FLOW ON indicator is flashing and
you have

not

had the wash gun open

continuously for more than 10 minutes, the flow
switch may not be operating correctly.

You

should immediately turn off the gas flow to the
main burners by manually turning the knob on
the gas valve from ON to pilot (standing pilot
heaters) or from ON to OFF (for electronic
ignition heaters). This is important as the main
burners of the heater may be continuing to fire
with no water flow through the heater.

Following this, the operation of the flow switch
must be checked. The FLOW ON indicator should
be on when there is water flow through the heater
and off when there is no water flow through the
heater. If the FLOW ON indicator remains on or
continues to flash even after flow through the
heater has stopped, see section 9.1 FLOW
SWITCH for servicing the flow switch.

6.7 THERMOSTAT INDICATOR

The THERMOSTAT indicator on the

AFE

control indicates whether the temperature of the
outlet water of the heater is below, at, or greater
than the current temperature setting on the
temperature setting display. If the THERMOSTAT
indicator is on, then the outlet water temperature
of the heater is below the current temperature
setting. If the THERMOSTAT indicator is off, then
the outlet water temperature of the heater is at or
above the current temperature setting.

If the THERMOSTAT indicator is flashing fast and
the temperature setting display is flashing an error
code, the

AFE

control is indicating that an

error condition exists. Refer to section 7.0

R O

A F E

ERRORS & WARNINGS for

diagnosing error conditions.

6.8 EXTERNAL CONTROL INDICATOR

The action displayed by the EXTERNAL
CONTROL indicator is dependent on how this
option was setup with your heater. The
EXTERNAL CONTROL is intended to show
whether an external control has enabled or
disabled the heater from operating.