9
1.3
Plumbing Considerations.
1.3.1
Cold water supply
.
General
The Vapanet range of electrode boilers is capable of
operating with a range of “raw mains” water quality. The water
supply should be within the following limits:-
Hardness 50 – 500 ppm
Conductivity 80 – 1000µS
PH 7.3 – 8.0
Silica
0
Pressure of between 1 - 8 bar.
In addition, if stainless steel electrodes are used the chlorine
level must not exceed 170 ppm.
Water Supply rates
1.20 l/min
1.20 l/min
1.20 l/min
2.50 l/min
2.50 l/min
5.00 l/min
5.00 l/min
LE05
LE09
LE18
LE30
LE45/LE55
LE60
LE90/LE110
LE05P
LE09P
LE18P
LE30P
LE45P
LE60P
LE90P
Do’s
Do
install a stop-valve/Shut-off valve and a strainer close to
the unit.
Do
provide a water supply with sufficient pressure and pipe
size to ensure an adequate flow rate to all units connected
to the system.
Do
use the water connection with nylon nut provided.
ALL Dimensions in mm
Don'ts
Don’t
use a wrench or other tool to tighten the water supply
connection - the nylon nut and rubber washer provided,
should only require tightening by hand to effect a seal. If
water seepage occurs, undo the nut to wipe the washer
clean and re-seat it.
1.3.2
Drain connection
.
General
Do's
Do
ensure metal drain and supply water pipework is grounded
electrically close to the unit (a ground/earth stud is
positioned on the underside of the cabinet.
Drain capacity per cylinder.
(Max.pump flow rate
at Power supply frequency)
l/min
Hz
16.8
17.2
50
60.
Do’s
Do
use copper or plastic pipe rated for 110
o
C.
Do
arrange to discharge drain water from the unit into a
trapped and vented drain at a position where flash steam
rising from the drain line vent will not pose a problem for
the Vapac or other equipment.
Do
provide adequate fall for the drain pipework to allow free
flow of water drained from each unit.
Do
ensure drain line pipe size will accommodate water being
drained at the same time from all the Vapac units which
are connected to it.
KEY: -
A
Tundish Fill-cup
B
Steam Cylinder
C
Feed Drain Manifold
D
Drain Pump
F
Feed Solenoid Valve
G
Water Connection
¾
” BSP.
H
Flexible hose
¾
” BSP.
K
35
∅
Steam Hose coupling and Hose
Clips.
L
35
∅
copper or plastic Drain for 110°C
Water with supports.
M
Tundish
N
U-trap side exit.
S
Optional Strainer
V
Isolation stop cock
Single Cylinder Units 30-55 kg/h
Twin Cylinder units 60-110 kg/h
Fig 7
A
B
C
D
F
K
L
M
N
H
G S V
