Alternate Heating COAL GUN S1000, Инструкция по установке и эксплуатации

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14
The operating limit is designed to maintain
boiler temperature under normal operating
conditions. The normal setting range for this
control is from 150
°
F to 180
°
F. The normal
factory setting is 180
°
F.
The dump zone temperature control is designed
to operate one or more heat zones to prevent
high boiler temperatures from occurring during
low load conditions. This setting should be set
20
°
F above the operating limit setting with a
maximum setting of 200
°
F. Also refer to the
dump zone wiring instructions for specific use
applications. See Appendix H for example dump
zone wiring applications.
The ash temperature monitoring control
incorporates a digital process controller for
operating the coal grate motor based on ash
temperature in the grate area. This process
offers significant advantages, including the
following: It maintains active monitoring of
grate temperature during periods of low
demand. This monitoring, and subsequent
cycling of grates, takes place whether the boiler
fan operates or not. This control also reduces the
likelihood of unburnt coal being dumped into
the ash pan.
This control is factory set to 130
°
F and should
not be adjusted to more than 10
°
F higher or
lower than the factory setting for best operation
(refer to Appendix G for instructions). When
reading the digital readout,
PV refers to the
process variable , or actual ash temperature
reading. SV refers to the setpoint variable , or the
temperature setpoint of the control. Based on
factory settings, when the temperature of the ash
drops to 10
°
F below the reading indicated at SV
the grates will cycle on, operating until ash
temperature climbs to the
SV value.
The power switches are located on the front of
the control panel. The “Main” switch will shut
off all power to the unit. The “Grate” switch
will shut down the grate motor function.
WARNING:
Fuses must be replaced with the
same amperage and fuse type as
supplied with the unit!
The S130 and S260 have two external fuses on
the control panel. The 15A fuse supplies
protection to all boiler functions. The 2A fuse
supplies protection for the grate motor circuit.
Steam
Steam Coal Guns require a connection to a
building thermostat. The switching relay on the
Steam Coal Gun has two T terminals to which a
low voltage thermostat must be connected.
BOILER DUMP ZONE
APPLICATIONS
Unlike oil or gas fired boilers, solid fuel boilers
will still produce some additional heat after the
call for heat has ended. This will cause the
boiler temperature to rise if no zones are calling
for heat. It is possible to see temperature rise
30
°
F or more under a low or no load condition.
This will take place until the boiler’s radiation
losses match the heat gain. It is recommended
that a dump zone be connected to dissipate this
excess heat to one or more zones in the system.
Setting the operating limit no higher than 180
°
F
allows for this heat rise to occur without
exceeding recommended maximum
temperatures.
The dump zone aquastat can be used to activate
a zone valve or circulator as a dry contact
switch. A common setting for dump zone
actuation would be 210
°
F, with the high limit
set point adjusted to 10
°
- 20
°
lower. When this
high limit is exceeded, and temperature reaches
the dump zone limit, one or more zones will be
energized and heat distributed until temperatures
fall sufficiently. See Appendix H for a variety of
dump zone wiring examples.