Marine Head Manual P/N 24533
3
June 25, 2002
2 AIR LINES
All
piping
supplied by
customer is to
conform to
U.S.C.G.
requirements
relating to
water tight
decks and
bulkhead (46CFR56.69)
Be sure airline from compressor is of sufficient
size, based on length of pipe run to head. We
suggest 3/8" air line up to 40', 1/2" air line up to
75', and 3/4" air line for over 75'.
Install a filter-regulator assembly in incoming
airline. Place the filter-regulator as close as
possible to the first Microflush Marine Head and
in an accessible location.
Set filter-regulator so that
60-65 psi constant is
available at the head
. Install an in-line air dryer,
Microphor P/N 30054 or combination
filter/regulator/dryer, P/N 94036.
Assemble the Air Connecting Kit provided and
connect to incoming air line with shut-off valve
between bulkhead and toilet. For LF-210
Models, use Air Connecting Kit P/N 93086, and
for LF-219 Integral Models use Air Connecting
Kit P/N 95172. The plastic airline provided goes
from the air supply to the Flush Activator. On
integral models, the plastic air line enters the
Microflush through the back wall or up through
the floor under the unit. Make sure air is OFF at
air compressor.
DO NOT CONNECT TO FLUSH
ACTIVATOR YET!
3 WATER LINES
Use a 1/2" water line and install a water shut-off
valve (angle stop) between bulkhead and toilet.
Water
at the head
must be regulated at an even
pressure between
20 to 50 PSI
for Microflush to
operate properly. Optimum pressure is 35 PSI.
DO NOT CONNECT WATER LINE TO
MICROFLUSH YET.
INSTALLATION PROCEDURES
4 DRAIN CONNECTION - See Rough-in
Dimensions
For direct overboard discharge, contact
Microphor or your dealer.
When using a 1-1/2" (38.1 mm) discharge line,
each toilet must go individually to the MSD or
holding tank. Do not connect more than one
toilet to a 1-1/2" (38.1 mm) discharge line.
If a vertical rise is required, the vertical rise must
be at the toilet. The maximum vertical rise is
36". The maximum horizontal run is 30 feet
(9.14 meters) and must slope a minimum of 1/8"
per foot (1 in 100) towards the MSD or holding
tank. For 1-1/2" lines, reduce horizontal pipe run
2 feet (.68 meters) per 90
o
elbow. Use long
sweep elbows, do not use 45
o
elbows.
Do not
use the inverted P-Trap with a vertical rise.
When multiple heads are installed, a vented 3"
gravity collection line is to be used with not more
than 4 heads per 3" line. Manifold the 1-1/2"
lines into the 3"collection line and provide a
grade of at least 1/4" per foot towards the MSD
or holding tank. Vent 3" line at the manifold
point.
Holding tank or MSD must be vertically vented
to atmosphere via 3" vent, terminating at highest
point possible. Limit the number of 45
o
or 90
o
fittings. Do not install loops on end of vent.
For holding tank installations, consider installing
a power fan sized so that a volume of air equal to
the empty tank volume is exchanged every 30 to
60 seconds. The negative pressure shall not
exceed -1.3 psi. This will allow for good air
flow out the vent.
Your Microflush Marine Head discharge line
must have a rise (trap) in order to provide back
pressure during the flush cycle - see Rough-in
Dimensions on pages 14-15.
Caution: Do not apply stress to align
Microflush rear or downward discharge
outlet to waste line.
This will result in eventual
damage to seal between Hopper and Toilet Bowl,
causing leaking. Do not use the P-Trap with a
vertical rising waste line.
LF-210 Downward Discharge Model
: Rest
Microflush on it's back on a padded surface (e.g.
