A
RUVG
MANUAL
24 of 35
June 14
8.
Purge
all
the
air
from
the
gas
lines.
Refer
to
the
Canadian
Natural
Gas
and
Propane
Installation
Code,
C.S.A.
Standard
B149.1
or
the
National
Fuel
Gas
Code
ANSI/Z223.1/NFPA
54
for
proper
method.
Check
all
connections
for
leaks
and
correct.
Ensure
that
the
inlet
pressure
agrees
with
the
approval
label.
9.
Enable
heating
and/or
cooling;
refer
to
unit
function
for
correct
sequence
and
operation.
10.
Confirm
field
wiring
voltage
drop
is
less
than
10%
when
equipment
is
operating.
11.
For
the
unit
to
operate
properly
a
system
air
balance
must
be
performed
to
ensure
correct
air
flow.
Failure
to
do
so
can
damage
the
equipment
and/or
building
and
can
be
a
cause
of
poor
indoor
air
quality.
12.
Damper
sections:
a.
Flat
mixing
dampers:
Both
the
fresh
air
and
return
air
dampers
are
fully
open
when
the
dampers
are
at
a
45°
angle
when
fully
stroked.
This
provides
optimum
mixing
of
the
air
streams
for
this
damper
arrangement.
b.
Angle
mixing
damper:
Angle
mixing
section
dampers
open
to
an
angle
of
90°
when
fully
stroked.
This
provides
optimum
mixing
of
the
air
streams
for
this
damper
arrangement.
13.
Some
units
are
equipped
with
an
adjustable
coil
air
bypass.
This
must
be
field
adjusted
during
the
system
air
balance
to
ensure
proper
air
flow
across
the
coil.
Adjust
the
bypass
to
achieve
coil
pressure
drop
as
stated
on
the
submittal
and/or
the
unit
function
sheet.
14.
Check
setting
of
fan
limit
control(s).
Adjust
high
limit
to
value
indicated
below
unless
wiring
diagram
shows
a
different
value.
High
Limit
180°F
(82°C)
Fan
Switch
ON
125°F
(52°C)
OFF
90°F
(32°C)
15.
Set
all
controls
to
the
settings
indicated
on
the
wiring
diagram.
16.
Re
‐
install
all
access
panels.
17.
Remove
any
packing
material
or
debris
and
dispose
appropriately.
