Camus Hydronics DRW1000, Инструкция по установке и обслуживанию

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If a second manometer is available it can be connected to
the appropriate gas ports. Typically the gas signal will
closely follow the air signal on all models. If the incoming
gas pressure reduces significantly as the VFD accelerates
to maximum speed the gas signal may lag behind the air
signal by up to 15%. This will occur once the actuator has
driven downwards as far as it can go. The amount that the
actuator has opened is registered by an indicator arm which
is visible through the view window.
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As the appliance comes on and fires, record the maximum
inches of water column which is achieved at maximum
speed on the VFD using start-up report form (93-0130). To
adjust this differential pressure when commissioning the
appliance, use the adjusting screw on the air shutter to the
fan. In all cases the final adjustment is to be made using a
combustion analyzer. Depending on field conditions
differential pressures will have to be adjusted accordingly.
Typically with long lateral runs the differential signal as read
will be reduced from the value shown on the rating plate.
The opposite will occur with tall stacks where drafts exceed
negative 0.15“W.C.
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If the appliance will not light off it will be necessary to adjust
the low fire as explained in the detailed start-up procedure.
3.9 GAS TRAIN AND CONTROLS
Figure 13: Typical Gas Train (DR2000 – 3000)
Figure 14: Typical Gas Train (DR 3500 – 5000)
3.10 VENTING OF GAS VALVES AND PRESSURE
SWITCHES
The optional gas pressure switches may be provided with
threaded termination points to be vented to the atmosphere,
outside the building. The gas pressure regulation function is
provided by the ratio gas valve which does not require
installation of a vent line. The optional gas pressure switches
are installed in the upper chamber of the appliance. Threaded
vent line connections from components requiring an external
vent line are provided on the component. These vent line
connection points may be accessed by removing the top of the
appliance. Local codes may require the routing of these bleeds
and vents to the atmosphere, outside the building. Proper
routing of vent lines to the atmosphere from the factory supplied
termination points is the responsibility of the installing
contractor.
3.11 BURNER
Figure 15: Burner
This appliance uses a single cylindrical burner installed vertically
into the cavity located in the center of the heat exchanger. There
is a unique burner for each one of the 18 models.
Burners
MAY NOT be interchanged between different Btu/hr
input models. The burner consists of a round mounting flange
welded to a mixing tube. The top side of the mixing tube provides
the transition which mounts the discharge from the combustion
air fan into the burner. The bottom side of the mixing tube is
attached to a stainless steel perforated sleeve. This stainless
steel sleeve is covered with a knitted alloy material that forms
the burner port surface. The knitted burner port material is a
metal fiber material which is a unique alloy of iron, chrome,
aluminum and several rare earth metals. This alloy is designed
to operate stress free as a burner port surface. The burner port
surface can sustain operation from a blue flame down to infrared
conditions as the burner input varies. In order to maximize the
operating life of the burner, the normal operating mode for the
Dynaforce® is a blue flame. Infrared operation will occur only if
air to gas adjustments are incorrect. If infrared operation is noted
the cause must be corrected.
Model 300 – 2500: Direct ignition is standard. The burner
mounting flange provides a flame view port and the mounting
point for the hot surface igniter and the flame sensor.
Model 3000 – 5000: Proven pilot ignition is standard. The burner
mounting flange provides a flame view port, the mounting point
for the hot surface igniter, a connection to the pilot tube and the
flame sensor.
The hot surface igniter and flame sensor are removable from the
burner mounting flange without removing the burner assembly
from the heat exchanger.
Never use an open flame (match, lighter, etc.) to check gas
connections.
Fan
Inlet
Firing
Valve
Metering
Valve
Differential
High Gas
Switch
Control
Valve
Regulator
Valve
Main
Manual
Valve
Low Gas
Switch