50
10) Use water proof material to carefully cover the refractory
at the rear of the combustion chamber of the heat
exchanger.
11) Use a vacuum cleaner to remove any debris that has
collected on the heat exchanger surfaces.
DO NOT
use
any type of solvent.
12) Brush the heat exchanger with a nylon bristle brush.
DO
NOT
use a metal brush. Re-vacuum the heat
exchanger.
13) Finish cleaning by wiping down the boiler heating
surfaces with a clean, damp cloth.
14) Rinse out any additional debris with a low pressure
water supply. Start rinsing from the rear of the heat
exchanger and slowly working your way towards the
front of the heat exchanger.
15) Remove the water proof material after cleaning is
complete.
16) Re-install the heat exchanger door by evenly torqueing
down the (6) nuts to 3 ft-lbs, burner, igniter and flame
sensor, and fan/ mixing tube assembly. Fasten the nuts
back to the heat exchanger assembly.
17) Re-connect the fan assembly to the boiler mixing tube.
18) Re-connect the condensate hose to the heat
exchanger.
NOTE
All gaskets on disassembled components must be
replaced with new gaskets/sealant on re-assembly, if
required. Gasket kits are available from the factory
CAUTION
When the vent system is disconnected for any reason it
must be reassembled and resealed according to vent
manufacturer’s instruction
9.4
CONDENSATE TREATMENT
Condensate occurs when the products of combustion are
cooled below their dew point in the heat transfer process.
The liquid condensate formed from this high efficiency heat
transfer process is mildly acidic.
•
The condensate will typically have a pH ranging from 4.0
to 5.0 as it is discharged from the condensate drain of
the appliance.
•
The condensate collection box inside each DynaMax
HS where the condensate is collected is constructed of
a non-corrosive material.
•
All materials external to the appliance in contact with the
condensate must be corrosion resistant.
•
Condensate must be able to flow freely from the
appliance. All condensate flow is accomplished by
gravity requiring a minimum downward slope of 1/4” per
foot (21mm/m) to ensure proper flow to a suitable drain.
•
All condensate piping and connections must be easily
accessible for routine maintenance and inspection.
•
Use solid piping when running condensate line across
the floor.
•
Check neutralized pH level regularly or as required by
local jurisdiction. Replace neutralizer medium as
required.
Neutralizer medium is expected to last approximately three
to six months depending on the amount of condensate
produced.
➢
Condensate Produced, USgal/h = [KBtu/h Input / 100]
In higher temperature systems less condensate will be
produced, extending the life of the neutralizer media. Media
viability can be verified with pH test strips (i.e. litmus paper).
Replace media as needed to maintain neutral state of
discharged condensate, as required by code. The
condensate disposal should also be checked for any
sediment buildup and to make sure that it is clean and
remains unobstructed.
Many jurisdictions will require the acidic condensate to be
neutralized before it can be placed in a drain system.
•
A neutralizer, calcium carbonate, to control the pH of the
liquid discharged to a drain system is provided with
every DynaMax HS boiler.
•
As the reservoir fills, it provides an extended residence
time to neutralize the condensate.
•
Residency time in the neutralizer reservoir allows time
for the pH to be raised.
•
Prime the neutralizer reservoir with 1 liter of water.
As the condensate migrates through the reservoir in typical
applications the pH is controlled to a range of 5.5 to 6.0
before exiting the system. Always check with local codes for
specific requirements.
9.5
IGNITER AND FLAME SENSOR
ELECTRODES
The direct spark igniter is to be checked at every service
interval. Clean the direct spark igniter as required to maintain
peak ignition efficiency.
1) Turn off main electrical power to the appliance.
2) Turn off main manual gas shutoff to the appliance.
3)
Locate the direct spark igniter and flame sensor.
4)
Disconnect the power lead to the direct spark igniter
and flame sensor
5) Loosen and remove the two (2) torx screws that
hold the igniter and flame sensor to the heat
exchanger flange.
6) Pull the igniter horizontally out of the heat
exchanger flange. Use care, do not hit or break the
igniter leads.
7) Remove any debris that has accumulated on the
electrodes using steel wool. If the electrodes cannot
be
cleaned
to
their
original
appearance,
replacements are needed. Do not use sand-paper
since this will contaminate the surface.
8) Check that the igniter and flame sensor gaskets are
still in good condition (no tears or seams). If the
gaskets are in good condition the electrodes can be
re-installed back to the heat exchanger flange.
Summary of Contents for DynaMax DMH201
Page 2: ......
Page 70: ...62 PART 14 EXPLODED VIEW PARTS LIST DYNAMAX HS WALL HUNG 10 May be located outside cabinet...
Page 71: ...63 DYNAMAX HS FLOOR MOUNT 10 May be located outside cabinet...
Page 77: ...69 11 6 Front Strut 14 8037 X X Not shown in Exploded View Part Recommended spare parts...
Page 78: ...70 PART 15 ELECTRICAL DIAGRAMS 15 1 DM 200 299 INTERNAL WIRING DIAGRAM...
Page 79: ...71 15 2 DM 399 800 INTERNAL WIRING DIAGRAM...
Page 80: ...72...
