SECTION 12: O
IL
P
IPING
F
OR
O
IL
-F
IRED
A
IR
T
URNOVER
U
NITS
45 of 143
SECTION 12: OIL PIPING FOR OIL-FIRED AIR TURNOVER UNITS
All oil piping to the air t
u
rno
v
er
u
nit m
u
st comply
w
ith:
United States: Refer to NFPA 31 - latest re
v
ision,
Standard for the Installation of Oil B
u
rning
Eq
u
ipment.
Canada: Refer to CSA B139 - latest re
v
ision,
Installation Code for Oil B
u
rning Eq
u
ipment.
The air t
u
rno
v
er
u
nits are a
v
aila
b
le
w
ith t
w
o different
types of manifolds:
• Factory M
u
t
u
al (FM)/Under
w
riters
La
b
oratories (UL) Compliant
• XL Ins
u
rance (former IRI) Compliant
12.1 Oil Pipin
g
and Pressures
Do not
u
se any sealant
w
hether paste or tape that
contains Teflon™ on the pipe or fittings. Teflon™
w
ill
ca
u
se
v
al
v
es to fail and
b
lock nozzles.
The
bu
rners
u
tilized on the air t
u
rno
v
er
u
nit are
designed for a t
w
o-pipe oil system for N
u
m
b
er 1 and
2 f
u
. Systems designed
for a t
w
o-pipe system can not
b
e
u
sed
w
ith a one-
pipe system.
FIGURE 2
8
: Two-Pipe Oil System
The maxim
u
m press
u
re allo
w
a
b
le on the s
u
ction side
of the p
u
mp is 3 PSIG (137.9 m
b
ar) static and 2 PSIG
(206.8 m
b
ar) operating. The maxim
u
m
v
ac
uu
m
allo
w
a
b
le on the s
u
ction side of the p
u
mp is 10" HG.
There is no factory piping for the s
u
ction line or ret
u
rn
line for the oil s
u
pply as they are located on the
bu
rner's p
u
mp.
. The size of the s
u
ction line is
dependent on the type of oil, amo
u
nt of lift, length of
s
u
ction line and the p
u
mp capacity. On single air
t
u
rno
v
er
u
nit installations, the ret
u
rn line sho
u
ld
b
e
the same size as the s
u
ction line. On m
u
ltiple air
t
u
rno
v
er
u
nit installations, each
u
nit m
u
st ha
v
e its
o
w
n indi
v
id
u
al s
u
ction line,
bu
t one ret
u
rn line may
b
e
u
sed if it is appropriately sized to handle the flo
w
of all the air t
u
rno
v
er
u
nits.
A hand sh
u
t off
v
al
v
e m
u
st
b
e pro
v
ided
b
y others in
the s
u
ction line near the
bu
rner along
w
ith a filter.
Sh
u
t-off
v
al
v
es m
u
st not
b
e installed in the ret
u
rn line
u
nless req
u
ired
b
y a specific code and e
v
en then,
only if an a
u
tomatic relief
v
al
v
e is installed across this
sh
u
t-off
v
al
v
e to allo
w
oil to
b
ypass directly
b
ack to
the tank if the
v
al
v
e is inad
v
ertently left in the closed
position. Use copper t
ub
ing
w
ith flare fittings or iron
pipe on all installations.
The piping m
u
st comply
w
ith:
United States: Refer to NFPA 31 - latest re
v
ision,
Standard for the Installation of Oil B
u
rning
Eq
u
ipment.
Canada: Refer to CSA B139 - latest re
v
ision,
Installation Code for Oil B
u
rning Eq
u
ipment.
Oil s
u
pply piping m
u
st conform to
b
est
bu
ilding
practices and local codes. D
u
ring installation of the
oil piping,
b
e s
u
re that no piping restricts accessi
b
ility
to the air t
u
rno
v
er
u
nit or its remo
v
a
b
le access doors.
WARNING
Explosion Hazard
Leak test all components of gas/oil piping
before operation.
Gas/oil can leak if piping is not installed
properly.
Do not high pressure test gas/oil piping with
air turnover unit connected.
Failure to follow these instructions can result
in death, injury or property damage.
TO
N
OZZLE
Содержание 7500 136
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