Rev.
10/22/01
HGM300/RDM800
mini
manual.doc
2
The
HGM300
should
be
centrally
located
in
the
mechanical
room
and
be
readily
accessible
for
easy
visual
monitoring
and
servicing.
Air
sample
tubing
may
be
run
in
lengths
up
to
500í.
The
fresh
air
purge
line
should
draw
from
an
area
that
does
not
contain
any
refrigerant
gas
and
cannot
exceed
300í
in
length.
The
exhaust
line
should
run
to
an
out
side
location
if
possible.
The
length
of
the
exhaust
line
cannot
exceed
100í.
Ideally,
two
to
three
pick
up
points
spaced
around
each
chiller
will
provide
sufficient
coverage.
It
may
be
necessary
to
perform
a
ì smokeî
test
of
the
mechanical
room
to
determine
the
best
locations.
The
smoke
test
would
provide
the
pattern
of
air
currents
present
in
the
mechanical
room.
HGM300/RDM800
Refrigerant
Gas
leak
monitor
mechanical
room
placement
Picture
of
HGM300
alarm
wiring)
The
RDM800
should
be
mounted
outside
of
the
mechanical
room
or
at
least
just
inside
of
a
door
to
the
room.
This
is
the
ì split
architecture
designî
for
safety
of
the
operator.
The
RDM800
can
be
located
up
to
4500í
from
the
HGM300.
The
RDM800
is
the
man
machine
interface
by
which
you
program
the
HGM300,
acknowledge
alarms
and
observe
conditions
inside
of
the
mechanical
room.
Note
that
there
are
two
additional
alarm
relay
contacts
in
the
RDM800
that
can
be
programmed
to
alarm
with
ì leak,
spill,
evacuate,
fault
or
monitor
onî .
RDM800
Remote
Display
Module
HGM300
Halogen Gas
Monitor
Outside Hallway
Machine Room
Sample Inlet Pickup Points
Chiller
Exhaust Fan
Sample
Inlet
Pickup
Point
Aux. Horn/Strobe
Remote Alarm
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