Camus Hydronics DFH/W1100, Инструкция по установке, эксплуатации и обслуживанию

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PART 8 FIELD STARTUP
PROCEDURE
8.1 CHECKING THE INSTALLATION
•
Inspect the connections for water, gas and electricity.
•
Confirm that water is being pumped toward the heat
exchanger inlet. Never pump away from the exchanger
since this will result in a low-pressure zone, which will
allow localized boiling and result in heat exchanger
damage.
•
Power to the boiler and pump must be from the same
circuit to prevent the boiler firing in case the pump is
inadvertently shut off.
•
Inlet gas pressure must be a minimum of 3” W.C. for
natural gas and 11” W.C. for propane.
•
With the boiler off, open the main gas supply valve and
vent the trapped air from the piping leading to the
boiler. Confirm that all gas connections to the heater
are tight and that there are no missing test plugs.
•
Connect a manometer to obtain the differential air
pressure between negative and positive ports. See
Figure 11.
•
The air/gas ratio controller automatically adjusts to
match the air signal on the gas side. In this way true
mass flow control of air/gas mix is achieved. All boilers
are test fired and factory set. A test sticker with actual
reading is affixed to the unit.
8.2 CHECKING THE CONSTRUCTION
•
Check the boiler wiring to see that it agrees with the
wiring diagram supplied.
•
Confirm that all terminal strips and field connections
are identified.
•
Confirm that the SOLA control is set in the proper
mode. Auto reset limits are fixed in all modes of
operation.
•
With the firing valve in the off position, switch on power
to the boiler. The fan motor will accelerate until the
airflow light energizes. If a light remains off past the
STAT light, the ignition sequence will not proceed.
•
Once all lights past the STAT are energized the ignition
module will try for ignition. When the igniter is hot
enough, the ratio gas valve actuator is energized and if
ignition is accomplished the Burner State changes to
Run. If ignition is not accomplished, two more ignition
trials will be made 15 seconds apart. The control will
then proceed to lockout and must be reset by
momentarily interrupting power. It is normal during
initial start up, when air is being purged from the
piping, to require two to three tries before successful
ignition.
•
With the boiler running, check for flue gas leaks along
the inner cabinet joints and around the flue outlet.
Some minor leakage is acceptable.
•
Repair any major leaks prior to the next step.
•
At the factory adjustments were made to achieve
proper input and acceptable burner performance at full
input and at minimum input.
•
Depending on field conditions, the CO
2
trim valve may
require some minor adjustment at full input. Refer to
Figure 11. Always set the appliance for a CO
2
level in
the range of 7.5% to 8.5% at full fire and 7.0% to 7.5%
at low for fire for non-condensing units. For condensing
units CO
2
may be set in the range of 8.5% to 9.0% at
full fire and 7.5% to 8.0% at low fire. For propane,
reading will be approximately 1.5% higher. Adjustment
at minimum input can be done at the low fire
adjustment screw by first removing the brass cap.
Turning adjustment screw clockwise will increase CO
2
.
8.3 FIRE TESTING
•
This boiler is designed for low fire soft start. At the start
of trial for ignition the fan will decelerate to minimum
fire and will light off at low fire before ramping up
towards full input depending on the 4 – 20 mA signal
from the controller.
•
Shut power off to the heater and open the firing valve.
Switch power back on and allow the burner to fire.
Ignition should be smooth. Normally the differential gas
pressure will be identical to the differential air pressure.
Actual differential pressure may vary from the numbers
on the test label due to the field conditions and sample
variations. Always make adjustments to meet the
recommended CO
2
levels. Adjust high fire first followed
by low fire adjustment.
Table 15: Combustion Values
Non-Condensing DynaFlame®
Natural Gas Propane
CO
2
CO CO
2
CO
Max. Fire 7.5% - 8.5% <100 PPM 9.0% - 10.0%
<100
PPM
Min. Fire 7.0% - 7.5% <100 PPM 8.5% - 9.0%
<100
PPM
Near-Condensing DynaFlame®
Natural Gas Propane
CO
2
CO CO
2
CO
Max. Fire 8.0% - 8.5% <100 PPM 9.5% - 10.0%
<100
PPM
Min. Fire 7.5% - 8.0% <100 PPM 9.0% - 9.5%
<100
PPM
Condensing DynaFlame®
Natural Gas Propane
CO
2
CO CO
2
CO
Max. Fire 8.5% - 9.0% <100 PPM 10.0% - 11.5%
<100
PPM
Min. Fire 7.5% - 8.0% <100 PPM 9.0% - 9.5%
<100
PPM
Alternate Stainless Steel Heat Exchangers Non-Condensing & Near-
Condensing DynaFlame®
Natural Gas Propane
CO
2
CO CO
2
CO
Max. Fire 8.0% - 9.0% <100 PPM 9.5% - 11.5%
<100
PPM
Min. Fire 8.0% - 9.0% <100 PPM 9.5% - 10.5%
<100
PPM