Installation Instructions
1.
Select a mounting location in lower part of the bilge
for the MAC1 air cell, but do not mount cell at this
time. MAC1 must be placed so that no debris will
become trapped inside it. Position the air cell
approximately 1-1/2 to 2 in. (38 to 51 mm) below
desired operation point and note location for attach-
ing the cell to a stringer or bulkhead, etc. Vertical
adjustment may be necessary for final calibration
(see step 6).
2.
Mount the BLS1 switch via optional mounting
bracket 15050737 or one of your supply. Keep the
BLS1 switch within 4 ft. (1.21 m) off the MAC1 air
cell. Tubing must NOT have a loop or flat area for
moisture to collect. Always maintain a downward
slope.
3.
Attach the MACT1 tubing kit to the air cell and to
the BLS1 switch. Any tubing can be used as long as
it does not corrode and it provides air tight connec-
tions.
4.
Wire the SPDT snap-switch according to instruc-
tions and your requirements. See typical wiring dia-
grams, below.
5.
The BLS1 trip point is preset to operate when bilge
level rises approximately 1-1/2 in. (38 mm) above the
bottom of the air cell. It will reset when level falls
approximately 3/4 in. (19 mm).
6.
Raise or lower the air cell so that the distance from
the hull to the trip point level on the side of the air
cell is equal to desired level of bilge. Secure the air
cell via the 2 hex bolts.
If necessary, adjustment can be made prior to
installation by placing the air cell in a bucket of
water and adjusting the white knurled knob inside
the BLS1 until the snap-switch actuates at the
desired level. Or, build a coffer dam around the air
cell in the bilge, add the desired amount of bilge
water, and adjust the switch trip knob as explained
above.
BE SURE
to remove coffer dam prior to
placing the BLS1 into service.
7.
Verify proper operation at desired levels prior to
launch.
NOTE:
The air cell will automatically recharge itself
anytime the bilge level falls below the air cell.
CAUTION:
Air cell tubing and connections must
remain air tight. Seal any holes placed in the air cell.
WARNING
Before beginning installation of this Murphy product:
✔
D
isconnect
ALL
electrical
po
w
er
to
the
machine.
✔
M
a
k
e
sure
the
machine
CA
NN
O
T operate
during
installation.
✔
F
ollo
w
all safet
y w
arnings
of
the
machine
manufacturer.
✔
R
ead
and
follo
w
all
installation
instructions.
AIR
Sensor Line
(MACT1 Tube Kit)
BLS1 Bilge
Level Switch
BLS1 Switch
BLS1 Switch
Customer
Supplied
Bracket
ST Series Alarm
Volume Cell
(MAC1)
Bulkhead
Optional
Mounting
Bracket
(15050737)
1
2
3
4
5
6
A
B
A
B
A
B
A
B
A
B
8–30 V
AC
N
O
C
N
C
8–40 V
DC
Po
w
er Suppl
y
+ve
–ve
A
larm #5
A
larm #1
A
larm #2
A
larm #3
A
larm #4
+
–
N
O
C
N
C
K-1
K-1
See Note
N
O
TE:
C
ontact rating should be
appropriate for horse po
w
er of the pump.
Operating
Bilge Pump
Base Model
BLS1
= Bilge level switch
BLSK1
= Bilge level switch kit:
BLS1
(
Bilge Level Switch)
MACT1 (Tubing kit)
MAC1 (Air cell)
Body (Lid and Case)
Blank
= Aluminum
Switch
Blank
= SPDT, 5A
Accessories and Replacement Parts (order separately)
15050737
: BLS1 mounting bracket.
15010205
: 5 A snap-switch and movement assembly.
15000123
: Diaphragm assembly.
15050823
: Piston.
15050824
: Knob for limit adjustment.
How to Order the BLSK1
To order use the model number designation diagram below.
Typical Installation and Wiring
BLSK1
BLSK-95107B page 2 of 2
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
+1 281 633 4500
fax
+1 281 633 4588
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
+52 444 8206264
fax
+52 444 8206336
Villahermosa 52 993 3162117
www.murphymex.com.mx
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055
fax
+44 1722 410088
www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
+1 661 272 4700
fax
+1 661 947 7570
www.murphyswitch.com
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
+61 3 9358 5555
fax
+61 3 9358 5558
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100
fax
+1 918 317 4266
www.fwmurphy.com
R
E
G ISTERE
D
USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
Printed
in
U
.S.
A
.
Warranty
A limited warranty on materials and workmanship is given with this FW Murphy product.
A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
