HMSC pumps come equipped with pressure switch set to
operate within a 20-40 PSI range. HMSD, HMSE, and HMSF
pumps have 30-50 PSI pressure switches. When pump is
used with precharged tank in system, set tank pre-charge at
18 PSI with a 20-40 PSI switch; set tank pre-charge at 28
PSI with a 30-50 PSI switch. Check tank pre-charge annually
with an ordinary tire gauge. Pre-charge is set with no water
pressure on system.
Priming the Shallow Well Pump
N
Ne
ev
ve
err rru
un
n p
pu
um
mp
p d
drry
y.. Running pump without
water may cause pump to overheat, damaging seal and pos-
sibly causing burns to persons handling pump. Fill pump with
water before starting.
N
Ne
ev
ve
err rru
un
n p
pu
um
mp
p a
ag
ga
aiin
ns
stt c
cllo
os
se
ed
d d
diis
sc
ch
ha
arrg
ge
e..
To do so can boil water inside pump, causing hazardous
pressure in unit, risk of explosion and possibly scalding per-
sons handling pump.
To prime the pump, completely open the priming valve locat-
ed just below the suction opening on the tank body by turning
the valve stem counter-clockwise all the way until it stops.
This valve may be left open during operation as a shallow
well pump with no jet. See Figure 3 and “NOTICE” below.
Remove priming plug from top of elbow (see Figure 3), and
fill with clean water. Replace plug.
Start pump and between 45-60 seconds. If water is not being
pumped, turn off pump and repeat priming process.
N
NO
OT
TIIC
CE
E:: If a bolt-on jet is being used, after pump is primed,
close the priming valve during operation as a shallow well
pump.
Service – Draining for Winter
D
Do
o n
no
ott tto
ou
uc
ch
h a
an
n o
op
pe
erra
attiin
ng
g m
mo
otto
orr.. Modern
motors are designed to operate at high temperatures. To
avoid burns when servicing pump, allow it to cool for 20 min-
utes after shut-down before handling.
When the pump is to be disconnected from service, or is in
danger of freezing, it should be drained. The pump has a
drain plug which must be removed. Remove the priming plug
to vent the pump.
If pump and motor are damaged due to freezing, the
Warranty is void.
3
TABLE I
R
Re
ec
co
om
mm
me
en
nd
de
ed
d F
Fu
us
siin
ng
g a
an
nd
d W
Wiirriin
ng
g D
Da
atta
a –
– 6
60
0 C
Cy
yc
clle
e M
Mo
otto
orrs
s
D
DIIS
ST
TA
AN
NC
CE
E IIN
N F
FE
EE
ET
T F
FR
RO
OM
M M
MO
OT
TO
OR
R T
TO
O M
ME
ET
TE
ER
R
B
BR
RA
AN
NC
CH
H
0
0’’
1
10
01
1’’
2
20
01
1’’
3
30
01
1’’
4
40
01
1’’
M
MA
AX
X..
F
FU
US
SE
E**
tto
o
tto
o
tto
o
tto
o
tto
o
M
MO
OT
TO
OR
R
L
LO
OA
AD
D
R
RA
AT
TIIN
NG
G
1
10
00
0’’
2
20
00
0’’
3
30
00
0’’
4
40
00
0’’
5
50
00
0’’
H
HP
P
V
VO
OL
LT
TS
S
A
AM
MP
PE
ER
RE
ES
S
A
AM
MP
PS
S
W
WIIR
RE
E S
SIIZ
ZE
E
3/4
115
14.8
20
12
8
6
6
4
3/4
230
7.4
15
14
14
14
12
10
1
115
19.2
25
10
8
6
4
4
1
230
9.6
15
14
14
12
10
10
1-1/2
115
24.0
30
10
6
6
4
3
1-1/2
230
12.0
15
14
14
12
10
10
*Fusetrons are recommended instead of fuses on all motor circuits.
