Rapid 7500 136 Installation, operation & service manual - page 56
Manual is about: 7500-Series
Indirect, Gas/Oil-Fired,
Industrial Air Turnover Unit
of
156
7500-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
44 of 143
FIGURE 27: Location of Side Orifice
11.6 Line Pressure Test - Leak Testin
g
The air t
u
rno
v
er
u
nit and its indi
v
id
u
al sh
u
t-off
v
al
v
e
m
u
st
b
e disconnected from the gas s
u
pply piping
systems d
u
ring any press
u
re testing of that system at
test press
u
res in excess of 1 PSIG (68.9 m
b
ar). The
air t
u
rno
v
er
u
nit m
u
st
b
e isolated from the gas s
u
pply
piping system
b
y closing its indi
v
id
u
al man
u
al gas
v
al
v
e that is located immediately
u
pstream of the
safety sh
u
t-off gas
v
al
v
e.