7500-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
46 of 143
12.2 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 oil s
u
pply piping
systems d
u
ring any press
u
re testing of that system at
test press
u
res. The air t
u
rno
v
er
u
nit m
u
st
b
e isolated
from the oil s
u
pply piping system
b
y disconnecting
the s
u
pply and ret
u
rn pipe from the p
u
mp. Only
u
se
air or nitrogen to leak test the piping.
FIGURE 29: Suntec Two Step Pump
FIGURE 30: Webster 3450 RPM Blower Motor
Driven Oil Pump
12.3 Pressure Test Ports
There are press
u
re test ports located on the
bu
rner's
p
u
mp. The test ports are a
v
aila
b
le to meas
u
re the
nozzle press
u
re and
b
ypass press
u
re (if so
eq
u
ipped).
. The S
u
ntec p
u
mp is typically
u
sed for
On/Off and High/Lo
w
/Off
bu
rners
u
p to 23 GPH (87.1
LPH). The We
b
ster p
u
mp is typically
u
sed for On/Off
and High/Lo
w
/Off
bu
rners a
b
o
v
e 23 GPH (87.1 LPH)
and all f
u
lly-mod
u
lating
bu
rners.
12.4 Oil Manifolds
FIGURE 31: FM or XL-Compliant Manifold for Air Turnover Units with Suntec Pump and On/Off Burner
