70

INSTALLATION DATA

Compound Gage0-30” Hg0-100 psi

Check Valve

Discharge Port1/4” Pipe Thread

This PortNever Used

Pressure AdjustingScrew 1/8” Allen

Head Socket UnderSeal Screw

SPM-135 Models

Preferred Cover inlet1/2” Pipe Thread

Return Port3/8” Pipe Thread

Optional Return Port1/4” Pipe Thread

Inlet Port #21/4” Pipe Thread

Return Port1/4” Pipe Thread

Inlet Port #11/4” Pipe ThreadAccess to 1/8”Bypass Plug

71

Pump Selector Switch

Test Button

Common DischargeManifold With

IntegralCheck Valves

Inlet Port1/4” Pipe Thread

Compound Gage0-30” Hg0-100 psi

Discharge Port1/2” Pipe Thread

InletPorts1/4”Pipe

Thread

Inlet Ports1/4” Pipe Thread

Return Port1/4” Pipe Thread

Inlet Port1/4” Pipe Thread

Return Port1/4” Pipe Thread

1/2” D.Mounting

Holes

Pressure AdjustingScrew 1/8” Allen

Head SocketUnder Seal Screw

Pressure Adjusting Screw1/8” Allen Head Socket

Under Seal Screw

72

Dim

ensi

on

s

Mo

del

AB

CD

SP

M-1

56.

8815

.50

——

SP

M-3

07.

4416

.13

——

SP

M-6

58.

9619

.50

——

SP

M-1

35—

—10

.94

21.4

4

Mo

del

AP

ipe

Tap

SP

M-1

5-D

A14

.94

1/4

SP

M-3

0-D

A16

.53

1/4

SP

M-6

5-D

A16

.90

1/4

SP

M-1

35-D

A21

.37

3/8

73

Dim

ensi

on

sD

up

lex

Au

tom

atic

74

Mo

del

AP

ipe

Tap

SP

M-1

5-D

M14

.94

1/4

SP

M-3

0-D

M16

.53

1/4

SP

M-6

5-D

M16

.90

1/4

SP

M-1

35-D

M21

.37

3/8

Dim

ensi

on

sD

up

lex

Man

ual

75

INSTALLATION DATA

SPM Single and Duplex Manual Models

SPM Single and Duplex Manual units are capable of supply-ing fuel oil to heating units or tanks located up to 200 feetabove the supply pumps. They are designed for use in main-tained pressure or open loop systems. Pump pressures canbe set at a range from 20 psi to 85 psi See Correct SupplyLine Size charts, for maximum discharge head.

Tank to Pump Connections

Connect suction line from the tank to preferred supply pumpinlet port. Connect return line from pump return port to tank.Internal 1/8" bypass plug (factory installed) must be in posi-tion for recommended two-pipe operation. Be certain allplugs and connections are secure and leak tight.

The correct suction line size can be determined by referringto the charts. Generally, the return line should be sized thesame as the suction line. Check valves in the suction linesbetween the tank and SPM units assure that pumps are fullof oil, ready for service. Check valves must be oil tight. Lowpressure drop swing type are recommended to minimize fric-tion loss.

For SPM Duplex Manual models, preferred installation callsfor a separate suction line from tank to pump for eachpump/motor unit. If system failure occurs because of a grossleak in the suction line of the primary unit, the second unitcan still provide backup service. Check valves can beinstalled in return lines to allow removal of inactive pump forservicing, while primary pump continues to run.

These typical installation diagrams, illustrating a maintainedpressure supply system or optional open loop system, forcontinuous pump operation, are shown for reference only.Compliance to all applicable codes where installed is the soleresponsibility of the installer.

76

*R

equi

red

if op

tiona

l ret

urn

loop

is n

ot u

sed

+N

ot s

uppl

ied

by W

ebst

er

+

+*

+

+ +

77

SPM Duplex Automatic Models

SPM Duplex Automatic units consist of two SPM Seriespump/motor assemblies and an electrical control panel. Theyare designed for use in maintained pressure supply systemsonly. if system pressure falls below a preset level, the controlautomatically switches from the primary pump/motor unit tothe secondary unit. If the backup pump/motor unit also failsto reach or maintain preset system pressure, the control alsoshuts off the backup unit.

A pump selector switch allows the two pump/motor units tobe manually alternated for even wear on each pump. Pumppressures can be set at a range from 20 psi to 85 psi. SeeCorrect Supply Line charts, for maximum discharge head.

Tank to Pump Connections

Units should be set for two-pipe operation. Preferred instal-lation calls for a separate suction line from tank to pump foreach pump/motor unit. If system failure occurs because of agross leak in the suction line of the primary unit, the secondunit can still provide backup service.

The correct suction line size can be determined by referringto the charts Generally, the return line should be sized thesame as the suction line. Low pressure drop, swing typecheck valves can be installed in the suction lines, assuringthat pumps are full of oil, ready for service. Check valves inreturn lines allow removal of inactive pump for servicing. Useof shutoff valves in return lines is not recommended. Be cer-tain all plugs and connections are secure and leak-tight.

+ Not supplied by Webster

+ +

78

+ + +

+

+

+

*

*R

equi

red

if op

tiona

l ret

urn

loop

is n

ot u

sed

+N

ot s

uppl

ied

by W

ebst

er

79

SPM LINE SIZINGCorrect sizing of the suction and discharge lines between thestorage tank and supply unit is vital. The use of tubing or pipewhich is too small can result in restricted oil supply. The fol-lowing charts are listed to help in line sizing for supply unitinstallation.

The charts can assist in determining the suggested minimumsuction and discharge line sizes for Standard Schedule 40iron or steel pipe (IPS) and for Type K copper tubing, whichis recommended for underground service.*

To use the line sizing charts, first a supply unit must be sizedto meet the specific application. Once this has been accom-plished, the unit model number (ex. SPM-30) should be usedas a guide in referring to the correct suction and/or dischargesizing charts.

NOTE: The use of pipe or tubing which is too small cancause increased frictional losses. The result could be aninadequate system discharge pressure. Check local andstate codes pertaining to oil heating systems for any require-ments which may affect the installation and/or operation ofthe system.

The following charts apply to all SPM Single, SPM DuplexManual and SPM Duplex Automatic models. These chartsare not intended to be used in sizing pipe for any other sup-ply or transfer pump/motor units.

*Charts represent maximum horizontal run vs. vertical lift orvertical head for Standard Schedule 40 iron or steel pipe(lPS) and for Type K copper tubing, recommended for under-ground service. The actual OD and wall thickness are indi-cated for each tube size. (NOTE: The nominal size of Type Ktubing is 1/8” smaller than actual OD.)

80

RE

CO

MM

EN

DE

DS

UC

TIO

N L

INE

SIZ

ES

PM

-15

81

RE

CO

MM

EN

DE

DS

UC

TIO

N L

INE

SP

M-3

0

Suc

tion

Cha

rts

repr

esen

t m

axim

umho

rizon

tal

run

vs.

vert

ical

lif

t fo

rS

tand

ard

Sch

edul

e 40

iro

n or

ste

elpi

pe (

IPS

) an

d fo

r Ty

pe K

cop

per

tubi

ng,

reco

mm

ende

d fo

r un

der-

grou

nd s

ervi

ce.

The

act

ual

OD

and

wa

ll th

ickn

ess

a

re

ind

ica

ted

fo

rea

ch tu

be s

ize.

(N

OT

E: T

he n

omin

alsi

ze o

f Ty

pe K

tub

ing

is 1

/8”

smal

ler

than

act

ual O

D.)

RE

CO

MM

EN

DE

DS

UC

TIO

N L

INE

SIZ

ES

PM

-65

82

RE

CO

MM

EN

DE

DS

UC

TIO

N L

INE

SP

M-1

35

83

Suc

tion

Cha

rts

repr

esen

t m

axim

umho

rizon

tal

run

vs.

vert

ical

lif

t fo

rS

tand

ard

Sch

edul

e 40

iro

n or

ste

elpi

pe (

IPS

) an

d fo

r Ty

pe K

cop

per

tubi

ng,

reco

mm

ende

d fo

r un

der-

grou

nd s

ervi

ce.

The

act

ual

OD

and

wa

ll th

ickn

ess

a

re

ind

ica

ted

fo

rea

ch tu

be s

ize.

(N

OT

E: T

he n

omin

alsi

ze o

f Ty

pe K

tub

ing

is 1

/8”

smal

ler

than

act

ual O

D.)

84

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SIZ

ES

PM

-15

85

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SP

M-3

0

Dis

char

ge C

hart

s re

pres

ent

max

i-m

um h

oriz

onta

l ru

n vs

. ve

rtic

al l

iftfo

r S

tand

ard

Sch

edul

e 40

iro

n or

stee

l pip

e (I

PS

) an

d fo

r Ty

pe K

cop

-p

er

tub

ing

, re

com

me

nd

ed

fo

run

derg

roun

d se

rvic

e.

The

ac

tual

OD

and

wal

l thi

ckne

ss a

re in

dica

ted

for

each

tu

be

size

. (N

OT

E:

The

nom

inal

siz

e of

Typ

e K

tubi

ng is

1/8

”sm

alle

r th

an a

ctua

l OD

.)

86

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SIZ

ES

PM

-65

87

RE

CO

MM

EN

DE

DIS

CH

AR

GE

LIN

ES

PM

-135

Dis

char

ge

Cha

rts

repr

esen

t m

axi-

mum

hor

izon

tal r

un v

s. v

ertic

al li

ft fo

rS

tand

ard

Sch

edul

e 40

iro

n or

ste

elpi

pe (

IPS

) an

d fo

r Ty

pe K

cop

per

tubi

ng,

reco

mm

ende

d fo

r un

der-

grou

nd s

ervi

ce.

The

act

ual

OD

and

wa

ll th

ickn

ess

a

re

ind

ica

ted

fo

rea

ch tu

be s

ize.

(N

OT

E: T

he n

omin

alsi

ze o

f Ty

pe K

tub

ing

is 1

/8”

smal

ler

than

act

ual O

D.)

88

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SIZ

ES

PM

-15-

DA

89

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SP

M-3

0-D

A

Dis

char

ge

Cha

rts

repr

esen

t m

axi-

mum

hor

izon

tal r

un v

s. v

ertic

al li

ft fo

rS

tand

ard

Sch

edul

e 40

iro

n or

ste

elpi

pe (

IPS

) an

d fo

r Ty

pe K

cop

per

tubi

ng,

reco

mm

ende

d fo

r un

der-

grou

nd s

ervi

ce.

The

act

ual

OD

and

wa

ll th

ickn

ess

a

re

ind

ica

ted

fo

rea

ch tu

be s

ize.

(N

OT

E: T

he n

omin

alsi

ze o

f Ty

pe K

tub

ing

is 1

/8”

smal

ler

than

act

ual O

D.)

90

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SIZ

ES

PM

-65-

DA

91

RE

CO

MM

EN

DE

DD

ISC

HA

RG

E L

INE

SP

M-1

35-D

A

Dis

char

ge

Cha

rts

repr

esen

t m

axi-

mum

hor

izon

tal r

un v

s. v

ertic

al li

ft fo

rS

tand

ard

Sch

edul

e 40

iro

n or

ste

elpi

pe (

IPS

) an

d fo

r Ty

pe K

cop

per

tubi

ng,

reco

mm

ende

d fo

r un

der-

grou

nd s

ervi

ce.

The

act

ual

OD

and

wa

ll th

ickn

ess

a

re

ind

ica

ted

fo

rea

ch tu

be s

ize.

(N

OT

E: T

he n

omin

alsi

ze o

f Ty

pe K

tub

ing

is 1

/8”

smal

ler

than

act

ual O

D.)

92

The adjusting screws on the Pressuretrol, located in the fac-tory wired control panel, should be set carefully according toinstructions, below.

Setting Pump Pressure

1. Set the differential scale indicator on the pressuretrol atapproximately 5 (half-way between 10 and bottom of scale).This permanently sets the differential scale. Set main scaleindicator at 0, so supply pump can run continuously duringpurging of supply line.

2. Purge lines. Run both supply pumps to assure both are oilfilled. For priming purposes, OSV valves can be manuallyoperated by inserting a stiff wire (paper clip) through thecover hole, and depressing the diaphragm plate.

3. Pressure adjustment, pump one: Install compound gaugein tee fitting in supply line of highest or most remote burner.After starting pump one, start all burners. With all burnersoperating at maximum firing rate, adjust pump one so gaugeat remote burners, reads 20 psi.

4 Pressuretrol adjustment: With all burners firing, switch topump two and adjust pump two so gauge at last burner readsslight positive pressure (2-5 psi). Gradually increase thepressuretrol main scale setting until pump two stops, pumpone starts, and alarm buzzer sounds. Allow pump one to runand build pressure. With pump one running and pump twooff, turn pump two pressure adjusting screw about one-quar-ter turn clockwise.

5. Pressure adjustment, pump two: Move selector switch tooff momentarily, then back to pump two. Alarm will shut offand pump two will start. Adjust pump two pressure setting soit is the same as pump one (set in step three). Switch backand forth between both pumps to confirm pressure settings

DifferentialScale

AdjustingScrew

Main Scale

AdjustingScrew

Main ScaleIndicator

DifferentialScale

Indicator

SPM Duplex Automatic Controls

93

are identical. Shut off all burners. Pressure at any oil safetyvalve in system must not exceed maximum operating pres-sure of 60 psi, when supply pump is running and all burnersare off.

INSTALLATION CHECKLIST

This checklist is a general review of instructions which arevital to trouble-free operation of supply units. Each itemshould be given serious consideration during planning andinstallation of the supply system.

Problem Installation ChecklistCheck motor electrical connec-tions

Check for obstruction in return line (such as reversed check valve)

Check circuit breaker and correct possible overload

Measure suction inlet vacuum

Check that all plugs and suction lineconnections are air tight

Be certain bypass plug is inposition

Use adequate size suction line

Be certain suction line filter or strainer has adequate capacity

Install low pressure drop swing typecheck valves in suction line

Confirm specified unit can provide needed vertical discharge pressure

Check that all supply line connec-tions are air and oil tight

Use adequate size supply line

Minimize supply line restrictions

Prime pump and purge supply lines of air

Check pump pressure setting

Confirm specified unit can provide needed capacity

In pressurized system, adjust pres-sure to develop reading of 10-15 psiat most remote or highest burner

In open loop system, install stand-pipe, back pressure valve or over-sized drop pipe

Check for leaking or damaged OSVs

Supply unitdoes not run

Unit runs, butno oil reachessupply pump

Unit supplies oilto distributionsystem, but nodelivery of oil atOSV valves

Oil delivery atOSV valves, butburners do notfire

Problem Installation ChecklistCheck for line failure betweenOSVs and burner pumps

Check burner for fuel pumpfailure or ignition problems

Install OSVs to assure pressure atburner pumps does not exceed3 psi

Check to assure that pressures atOSVs do not exceed maximum of60 psi

Install pressure relief valve ifentrapment condition is detected

In multi-level systems, checkvertical distance between lowest OSV valve and highestpoint in the piping.

If you suspect mechanical failure of equipment, please con-tact your supplier.

94

Oil delivery atOSV valves, butburners do notfire (Cont.)

Burner pumpseal damage