Camus Hydronics DRW1000, Инструкция по установке и обслуживанию

Страница: 62 / 82

62
the drain. Use standard ½" vinyl, PVC, CPVC or suitable hose
to run to floor drain.
When the condensate level in the reservoir rises to the drain, it
spills out into the condensate bin and from there exits to the
external neutralizer. As the pH number increases in numerical
value, the relative acidity of the discharge decreases. The
neutralized condensate may then be discharged into a suitable
drain system without fear of damage to the drain system. Always
check with local codes for specific pH requirements.
Neutralizers may be used in series to raise pH.
The condensate collection box supplied with the Dynaforce® is
supplied with an initial charge of neutralizer medium. This
neutralizer medium is expected to last approximately 3 to 6
months depending on the amount of condensate produced.
Neutralizer refills are available from Camus®.
10.5 BURNER MAINTENANCE
The burner should be removed for inspection and cleaning on
an annual basis. An appliance installed in a dust or dirt
contaminated environment will require inspection and cleaning
on a more frequent schedule. The fan assisted combustion
process may force airborne dust and dirt contaminants,
contained in the combustion air, into the burner. With sustained
operation, non-combustible contaminants may reduce burner
port area, reduce burner input or cause non-warrantable
damage to the burner.
Airborne contaminants such as dust, dirt, concrete dust or dry
wall dust can be drawn into the burner with the combustion air
and block the burner port area. An external combustion air filter
is provided with the appliance. An additional filter is located at
the fan inlet (DR1200 – 5000) and like the external filter may be
washed in the sink under the tap. This internal filter should be
checked and cleaned at the time of appliance commissioning
and on a six month interval or more often in a contaminated
environment.
10.5.1 BURNER REMOVAL
Access to the burner will require the following steps:
• Turn off main electrical power to the appliance.
•
Turn off main manual gas shutoff to the appliance
• Remove the top cover.
• Disconnect the gas supply connection to the fan inlet.
• Disconnect the fan motor power wires at the harness.
•
Remove the hot surface igniter and the flame sensor.
• Remove the sensing tubes from the air ratio gas valve
to the combustion air fan.
• Remove the 4 nuts holding the fan assembly to the
heat exchanger and remove the fan assembly. On
occasion the red silicone gasket may adhere to the
underside of the fan’s flange. Carefully pry the flange
away from the gasket prior to removing the fan
assembly.
• The burner can now be lifted vertically out of the heat
exchanger cavity. A graphite-backed ceramic paper
gasket is located directly under the burner flange. This
gasket must be replaced if it is damaged.
• Use care to prevent damage to the knitted metal fiber
of the burner surface.
• Check all gaskets and replace as necessary. Gaskets
affected by heat will not reseal properly and must be
replaced.
•
Replace the burner in the reverse order that it was
removed. Insert the igniter and sensor before doing the
final tightening on the fan mounting nuts. Evenly
tighten the nuts to 20 ft-lbs (models 300 – 1000) and
25 ft-lbs (models 1200 – 5000)
NOTE:
When the combustion air fan is removed for any reason, the
inlet to the burner must be covered to prevent further foreign
objects from falling into the burner. Always look inside the
burner to check for dents. Do not place a burner back into
operation if the inner distribution screen has been dented
during the service operation, call the factory for
recommendations. Use care when removing and handling
the burner, Sharp objects or impact may damage or tear the
metal fiber surface rendering the burner unfit for service.
10.5.2 BURNER CLEANING PROCEDURE
Remove any visible dust or dirt blockage from the surface of
the burner using water from a garden house. Wash the
burner with low pressure water. Never wipe or brush the
surface of the burner nor use high pressure water or air.
The burner may best be cleaned by immersing the burner port
area in a solution of dishwashing detergent and hot water.
Allow the burner to remain in the solution for a short period of
time to remove dust, dirt and oil or grease laden contaminants.
Rinse the burner thoroughly with clean water to remove any
residue from the detergent cleaner. The burner should be air
dried after removal from the cleaning solution and rinsing. DO
NOT
use chlorine based solvents or cleaning agents on the
burner.
10.6 CHANGING THE HOT SURFACE IGNITER
• The hot surface igniter is to be checked at least after every
4000 hours of operation and more frequently under high
cycling conditions. This will maintain peak ignition
efficiency.
• Turn off main electrical power to the appliance.
•
Turn off main manual gas shutoff to the appliance.
• Locate the hot surface igniter.
•
Disconnect the two power leads to the hot surface igniter.
•
Loosen and remove the two screws that hold the igniter.
• Lift the igniter vertically out of the burner mounting flange.
Use care, do not hit or break the silicon carbide igniter. DO
NOT pull out by leads.
• Ensure that the ceramic paper gaskets used to seal the
base and top of the igniter are reinstalled on the new igniter.
10.6.1 RE-INSTALLING THE IGNITER
• Confirm that the end of the replacement igniter has a bead
of silicone sealing the gap between the metal mounting
flange and the ceramic shaft of the igniter.
• Carefully insert the igniter into the mounting point on the
burner flange and push into position on top of the fan’s
flange.
•
Reinstall the two mounting head screws and tighten by
hand only.
•
Ensure that the igniter ceramic paper gaskets are properly
installed and seal the point of contact between the igniter
and fan mounting flange.
• Reconnect the power leads to the igniter.
•
Turn on main gas supply.
• Turn on main power.
•
Test fire the appliance to ensure proper operation.
• The igniter must generate a minimum of 3A to reliably light