series 21 installation instructions · if diaphragm type automatic gas valve is used with seperate...
TRANSCRIPT
TABLE OF CONTENTS
Specifications and Dimensions....................................................2Installation of Components..........................................................3Preliminary Circuit Analysis..........................................................3Field Service Checklist.................................................................4Performance Check.......................................................................5Extended High-Fire Ignition..........................................................5Wiring Diagrams............................................................................6Valve Adjustments.........................................................................7
1© 2010 Maxitrol Company, All Rights Reserved
SERIES 21 Amplifiers (A1010U Shown):
A1010UAD1010U - integral temp. selector
For included selectable tempera-ture ranges, see pg. 5.
Modulator-Regulator Valves:
MR410 - (3/8” and 1/2” pipe sizes)MR510 - (1/2” and 3/4” pipe sizes)MR610 - (3/4” and 1” pipe sizes)
Remote Temperature Selectors:TD121 - (55º to 90ºF)TD121A - (80º to 130ºF)TD121B - (120º to 170ºF)TD121C - (160º to 210ºF)TD121D - (200º to 250ºF)TD121E - (100º to 250ºF)TD121F - (40º to 80ºF)NOTE: Remote Selector and Discharge Temperature Sensor must have same tem-perature range to be compatible. Optional: ETD-1 enclosure, EFP-1 cover plate only - no enclosure
Discharge Temperature Sensors: use with Mixing TubeTS121 - (55º to 90ºF)TS121A - (80º to 130ºF)TS121B - (120º to 170ºF)TS121C - (160º to 210ºF)TS121D - (200º to 250ºF)TS121E - (100º to 250ºF)TS121F - (40º to 80ºF)
Mixing Tubes: use with Sensors
MT1-9 or MT2-9 (9” length)MT1-12 or MT2-12 (12” length)MT1-23 or MT2-23 (23” length)MT1-28 or MT2-28 (28” length)MT1-57 (57” length)
OPTIONAL: Inlet Air Sensors - use with Mixing Tube
TS10765A - (8:1 ratio)TS10765B - (5:1 ratio)TS10765C - (3:5:1 ratio)
OPTIONAL: Override Stat - use with TD121 only
T115 - (40º to 90ºF)
Series 21 Installation InstructionsInstallation Instructions and field service checklist
DESCRIPTION
Selectra® SERIES 21 electronic gas flame modulation systems are designed primarily for make-up air heating, as components of indirect fired units with atmospheric burners. All fuel gases are compatible.
The SERIES 21 is designed for single or multiple furnace opera-tion. It is capable of controlling up to four furnaces. It may be field installed on existing equipment or specified for new equipment installation.
The systems utilize Modulator-Regulator valves. Amplifiers are available with integral or remote temperature selection. High Fire ignition selection (0, 5 or 25 second) is standard on all models. A discharge air temperature sensor is mounted within a mixing tube housing. Optionally, a room override thermostat when used in conjunction with the remote temperature selector provides space temperature control by raising the discharge air tempera-ture to a pre-selected point.
Also optional, an inlet air sensor (and mixing tube) provides inverse change in discharge air for each degree change in inlet air - when installed in a convenient duct location upstream of the burner.
Read these instructions carefully. Failure to follow them could result in a fire or explosion causing property damage, personal injury, or loss of life. The product must be installed and oper-ated according to all local regulations.
Service and or installation must be performed by a trained, ex-perienced service technician.
SYSTEM COMPONENTS
SPECIFICATIONS
Power Requirements:Single Furnace.....24V AC, 40VA capacityMultiple Furnace.....24V AC, 100VA capacity
Temperature Control Range:Standard.....55º to 90ºFOptional ranges to.....250ºF
Ambient Limits: -30º to 125ºF / -34º to 52ºC
2© 2010 Maxitrol Company, All Rights Reserved
T115
3.00
Mounting Holes
6.002.00
3.38A1010UAD1010U
TD121
T115
MIXING TUBES
A1010U / AD1010U
DIMENSIONS
NOTICE
Transformer secondary must not be grounded in any por-tion of the circuit external to a Maxitrol amplifier. If exist-ing transformer is grounded, a seperate isolated trans-former must be used. Electrical interference may effect performance and/or damage equipment.
Gases: Suitable for natural, manufactured, mixed gases, lique-fied petroleum gases, and LP gas-air mixtures.
Pressure Limits:Inlet (maximum) : MR410, 510, 610.....1 psi / 69 mbar
Outlet (maximum fire)standard spring*.....3.0” to 5.0” w.c. / 7 to 12 mbarH - models..... 7.5” to 12” w.c. / 19 to 30 mbarMax. set point not to exceed 10” w.c. above min. set point
Outlet (minimum fire)MR*10B10L standard spring*.....0.2” to 1.2” w.c. / .5 to 3 mbarMR*10B10L-1 spring*.....1” to 2.8” w.c. / 2.5 to 7 mbar(*other spring ranges available - Consult Maxitrol Company.)
Power LED
Relay LED
Valve LED
INSTALLATION OF COMPONENTS
Amplifier: Slide or snap out circuit board from amplifier base. Mount base with two screws in chosen location protected from weather or contaminated atmosphere. Amplifier is ready for wir-ing when circuit board is replaced on base - protective cover need not be removed.
Discharge Temperature Sensor (in Mixing Tube): Cut hole in air duct - install several feet from heat exchanger to avoid thermal radiation effects. Locate in discharge air stream. Remove cover and wire as shown in appropriate diagram, page 6 - reassemble.
Remote Selector: Install in control cabinet or other chosen location. Remove cover and wire as shown in appropriate diagram, page 6 - reassemble.
Room Override Thermostat: Place in heated area to sense average room temperature, not in direct path of discharge air stream. Use only with TD121 Remote Temperature Selector. Wire as shown in appropriate diagram, page 6.
NOTE: For systems using up to four automatic gas valves with 0.8 amp maximum current each, a 100VA transformer will be adequate.
In the event that an automatic valve(s) current exceeds 0.8 amps, it would be advisable to wire according to the ‘Independent Pow-er Supply’ diagram, page 6. The transformer for the modulating power - terminals 8 and 9 - should be 40VA, and the automatic valve transformer should be capable of handling required loads up to 3.5 amps maximum. If exceeding 3.5 amps, it will be neces-sary to operate an auxiliary relay with contact rating sufficient to handle the automatic valves and any accessories.
If diaphragm type automatic gas valve is used with seperate regulator, install MR valve downstream from diaphragm gas valve. Retain regulator in manifold and adjust 2 or 3 turns to compensate for pressure drop of MR valve.
If full combination control is used, install MR valve downstream. Adjust regula-tor in combination control 2 or 3 turns to compensate for pressure drop at MR valve.
If solenoid type automatic gas valve is used with seperate regulator, replace regulator with the MR valve.
3© 2010 Maxitrol Company, All Rights Reserved
In order to diagnose the cause of problems in this system it is necessary to determine certain values. It is helpful to have an AC and DC voltmeter and an ohmmeter capable of reading 0 to 15,000 ohms. For ease in trouble shooting, it is necessary to rewire the system, replacing the discharge air sensor with a 4500 ohms, eg. 4300 ohm + 200 ohm, 1/2 watt test resistors in series.
Modulating Function Test:Connect a DC voltmeter to amplifier terminals 1 and 2. If more convenient, the meter may be attached to the MR valve terminals. Rotate temperature selection knob to maximum setting. The DC Valve LED is “OFF”. The voltage should gradually increase to at least 20 volts when the temperature selector is slowly rotated to its minimum (generally over 3º to 4º range). Valve LED is “ON”. See “Valve LED” below.
Automatic Valve Function:Disconnect the wires at amplifier terminals 10 and 11, and con-nect an ohmmeter. Rotate temperature selector to maximum set-ting - ohmmeter should show continuity, Relay LED is “ON”. Ro-tate temperature selector to minimum setting - ohmmeter should show open circuit, Relay LED is “OFF”. Reconnect the wires to terminals 10 and 11.
If the voltage and continuity check are observed as noted, it is proved that the amplifier and temperature selector are operating properly.
After testing, remove the resistor and reconnect the discharge air sensor.
PRELIMINARY CIRCUIT ANALYSIS
GAS TRAINS
Valve: The MR valve must be in upright position, in a horizontal run of pipe only, with pilot gas supply upstream.
NOTICE
Wiring Run: Control wires connected to the Override Stat, Discharge Air Sensor, or Remote Temperature Selector must not be run close to or inside conduit with power or ignition wires. Doing so may cause the unit to function erratically or may destroy the amplifier. If shielded wires are used, shield must be insulated and grounded at the amplifier location only.
VALVE LEDThe PCB “Valve” LED illuminates when the output DC voltage to the valve is approximately 2 VDC or greater. It does not indicate valve positioning or whether the system is in modulation mode.
The Valve LED will be:• “OFF” at maximum high fire (0VDC) and during the high fire ignition duration (if used)• “ON” when PCB “Relay” LED is “OFF”• “ON” or “OFF” when the “Relay” LED is “ON”
SYM
PTO
MPO
SSIB
LE C
AU
SEFI
ELD
TES
TR
EMED
YA
.A
utom
atic
con
trol
val
ve w
ill
not c
lose
des
pite
full
rang
e of
mod
ulat
ing
volta
ge a
t te
rmin
als
1 an
d 2.
1. A
utom
atic
con
trol v
alve
not
ope
ratin
g pr
oper
ly.
2. I
nsta
llatio
n w
iring
err
or.
3. A
mpl
ifier
is n
ot o
pera
ting
prop
erly.
1. R
emov
e w
ire fr
om v
alve
, if v
alve
doe
s no
t clo
se -
valv
e is
not
ope
ratin
g pr
oper
ly.
2. R
emov
e w
ire fr
om a
mpl
ifier
term
inal
10
or 1
1. If
val
ve re
mai
ns o
pen,
che
ck fo
r mis
wiri
ng.
3. I
f AC
vol
tage
will
not
dro
p to
zer
o at
term
inal
s 8
and
11 -
whe
n D
C v
olta
ge a
t ter
min
als
1
and
2 is
abo
ve 2
0 V
DC
- am
plifi
er is
faul
ty. I
f spa
ce te
mpe
ratu
re is
less
than
60º
or
g
reat
er th
an 8
5ºF
(<16
º or >
29º
C),
see
Pre
limin
ary
Circ
uit A
naly
sis,
pag
e 3.
1. R
epla
ce a
utom
atic
con
trol v
alve
.
2. C
orre
ct w
iring
.
3. R
epla
ce a
mpl
ifier
.
B.
Aut
omat
ic c
ontr
ol v
alve
w
on’t
open
des
pite
full
rang
e of
mod
ulat
ing
volta
ge a
t te
rmin
als
1 an
d 2.
4. A
utom
atic
con
trol v
alve
not
ope
ratin
g pr
oper
ly.
5. O
pen
wire
to a
utom
atic
val
ve.
6. A
mpl
ifier
is n
ot o
pera
ting
prop
erly.
4. R
ead
volta
ge a
cros
s va
lve
term
inal
s. If
24
VAC
, val
ve is
not
ope
ratin
g pr
oper
ly.
5. R
ead
volta
ge a
cros
s te
rmin
als
8 an
d 11
on
ampl
ifier
. If 2
4 VA
C, c
heck
for o
pen
circ
uit t
o
a
utom
atic
val
ve. I
f spa
ce te
mpe
ratu
re is
less
than
60º
or g
reat
er th
an 8
5ºF
(<16
º or
>
29ºC
), se
e P
relim
inar
y C
ircui
t Ana
lysi
s, p
age
3.
6. I
f AC
vol
tage
read
ing
rem
ains
zer
o - w
hen
DC
vol
tage
at t
erm
inal
s 1
and
2 is
bel
ow 1
4
V D
C -
ampl
ifier
is fa
ulty
. If s
pace
tem
pera
ture
is le
ss th
an 6
0º o
r gre
ater
than
85º
F (<
16º
>
29º
C),
see
Pre
limin
ary
Circ
uit A
naly
sis,
pag
e 3.
4. R
epla
ce a
utom
atic
con
trol v
alve
.
5. C
orre
ct w
iring
6. R
epla
ce a
mpl
ifier
.
C.
No
gas
flow
.7.
Mal
func
tioni
ng p
ower
sup
ply.
8. M
R v
alve
inst
alle
d ba
ckw
ards
.9.
R55
cut
or m
issi
ng.
7. R
ead
volta
ge a
t am
plifi
er te
rmin
als
8 an
d 11
(24
VAC
).
8. A
rrow
s on
MR
val
ve s
houl
d po
int i
n th
e di
rect
ion
of g
as fl
ow.
9. R
55 s
houl
d be
inst
alle
d at
term
inal
s 5
& 7
(zer
o oh
m re
sist
or).
7. P
ower
sup
ply
mus
t be
24 V
AC
.
8. I
nsta
ll pr
oper
ly.9.
Ins
tall
jum
per b
etw
een
term
inal
s 5
& 7
.
D.
Con
tinuo
us h
igh
fire.
10. O
pen
circ
uit i
n se
nsin
g an
d se
tting
ci
rcui
t.10
. D
isco
nnec
t and
mea
sure
acr
oss
wire
s co
nnec
ted
to a
mpl
ifier
term
inal
s 3
and
4
(A
1010
U m
odel
s). S
houl
d re
ad b
etw
een
8,00
0 to
12,
000
ohm
s.10
. If
abov
e 12
,000
ohm
s, c
heck
circ
uit f
or o
pen
or
loos
e w
ires.
E.C
ontin
uous
hig
h fir
e bu
t au
tom
atic
val
ve c
ycle
s.11
. O
pen
circ
uit i
n w
iring
to M
R v
alve
.
12.
Plu
nger
jam
med
or i
nsta
lled
upsi
de
dow
n.
13.
MR
val
ve n
ot o
pera
ting
prop
erly.
11.
Che
ck w
iring
for d
efec
ts.
12.
Exa
min
e. P
lung
er s
houl
d be
sm
ooth
and
cle
an a
nd o
pera
te fr
eely
in s
olen
oid
slee
ve.
Mus
t be
inst
alle
d as
sho
wn
in “V
alve
Adj
ustm
ents
” pg.
7, “
M/M
R V
alve
Dia
gram
”.
13.
Mea
sure
vol
tage
acr
oss
MR
val
ve.
11.
Rep
ace
wiri
ng if
nec
essa
ry.
12.
Cle
an p
lung
er if
nec
essa
ry.
13.
If m
odul
atin
g vo
ltage
s ar
e ob
tain
ed b
ut n
o ga
s
m
odul
atio
n, M
R v
alve
is fa
ulty
. Rep
lace
if n
eces
sary
.
F.Fu
rnac
e w
on’t
activ
ate
due
to c
onst
ant h
igh
mod
ulat
ing
volta
ge. (
abov
e 17
V D
C)
14.
Sho
rt ci
rcui
t in
sens
ing
and
setti
ng
circ
uit.
14.
Dis
conn
ect a
nd m
easu
re a
cros
s w
ires
conn
ecte
d to
am
plifi
er te
rmin
als
3 an
d 4
(A10
10
mod
els)
. Sho
uld
read
bet
wee
n 8,
000
and
12,0
00 o
hms.
14.
If be
low
8,0
00 o
hms,
che
ck c
ircui
t for
sho
rts o
r \
m
isw
iring
.
G.
Con
tinuo
us lo
w o
r med
ium
fir
e, b
ut a
utom
atic
val
ve
cycl
es c
orre
ctly
.
15.
Hea
t loa
d re
quire
s lo
w fi
re o
nly.
16.
Plu
nger
and
/or m
axim
um s
prin
g
m
issi
ng.
17.
Jam
med
plu
nger
.
18.
Oth
er v
alve
pro
blem
s.
19.
Inad
equa
te s
uppl
y pr
essu
re.
15.
Incr
ease
tem
pera
ture
set
ting
10 d
egre
es.
16.
Che
ck fo
r par
ts (s
ee “V
alve
Adj
ustm
ents
” pg.
7, “
M/M
R V
alve
Dia
gram
”).
17.
Exa
min
e. P
lung
er s
houl
d be
sm
ooth
and
cle
an a
nd o
pera
te fr
eely
in s
olen
oid
slee
ve.
Mus
t be
inst
alle
d as
sho
wn
in “V
alve
Adj
ustm
ents
” pg.
7, “
M/M
R V
alve
Dia
gram
”.
18.
Rem
ove
wire
from
MR
val
ve.
19.
Rem
ove
sprin
g 5
from
MR
val
ve (s
ee “V
alve
Adj
ustm
ents
” pg.
7, “
M/M
R V
alve
D
iagr
am”)
pus
h do
wn
on p
lung
er. I
nsuf
ficie
nt m
anifo
ld p
ress
ure
with
furn
ace
oper
atin
g
in
dica
tes
supp
ly is
too
low
.
15.
If he
ater
goe
s to
hig
h fir
e, s
yste
m is
wor
king
c
orre
ctly.
16.
Inst
all c
orre
ct p
arts
.
17.
Cle
an p
lung
er if
nec
essa
ry.
18.
If M
R v
alve
rem
ains
on
low
fire
, val
ve is
not
o
pera
ting
prop
erly.
Che
ck it
em 1
9 be
low
, the
n
re
plac
e va
lve
if ne
cess
ary.
19.
Che
ck fo
r obs
truct
ion
in g
as p
ipe
ahea
d of
con
trols
.
In
crea
se g
as p
ress
ure
if po
ssib
le.
H.
Inco
rrec
t dis
char
ge a
ir te
mpe
ratu
re.
20.
Cal
ibra
tion
20.
Che
ck s
eal o
n ca
libra
tion
pote
ntio
met
er.
20.
Rec
alib
rate
per
“Tem
pera
ture
Cal
ibra
tion”
p
roce
dure
.
I.Er
ratic
or s
ever
ely
puls
atin
g fla
me.
21.
Dirt
y or
stic
king
plu
nger
.
22.
Inte
rmitt
ent s
horti
ng in
wiri
ng.
23.
Am
plifi
er n
ot o
pera
ting
prop
erly.
21.
Exa
min
e. P
lung
er s
houl
d be
sm
ooth
and
cle
an a
nd o
pera
te fr
eely
in s
olen
oid
slee
ve.
Mus
t be
inst
alle
d as
sho
wn
in “V
alve
Adj
ustm
ents
” pg.
7, “
M/M
R V
alve
Dia
gram
”.
22.
Insp
ect w
iring
.
23.
Obs
erve
DC
vol
tage
acr
oss
ampl
ifier
term
inal
s 1
and
2.
21.
Cle
an p
lung
er if
nec
essa
ry.
22.
Cor
rect
wiri
ng.
23.
If er
ratic
or p
ulsa
ting
DC
vol
tage
is o
bser
ved
and
wiri
ng s
how
s no
def
ects
, rep
lace
am
plifi
er. I
f
er
ratic
or p
ulsa
ting
volta
ge c
ontin
ues,
con
tact
M
axitr
ol C
ompa
ny.
*Con
trol
circ
uits
ext
erna
l to
the
Serie
s 21
can
cau
se b
urne
r mal
func
tion.
Alw
ays
chec
k m
anua
l val
ve to
be
cert
ain
gas
is o
n, a
nd c
heck
lim
it co
ntro
ls fo
r nor
mal
ope
ratio
n.
4© 2010 Maxitrol Company, All Rights Reserved
FIEL
D S
ERVI
CE
CH
ECK
LIST
PERFORMANCE CHECK
With modulator-regulator valve installed as instructed (voltages are approximate):
Low Fire is above 14 volts DC. Manifold pressure can be adjusted as follows:MR*10B10L Standard spring 0.2” to 1.2” w.c. (.5 to 3 mbar)MR*10B10L-1 spring 1” to 2.8” w.c. (2.5 to 7 mbar)
High Fire is obtained at zero volts DC.Use manufacturer’s pressure specifications when available. Maxitrol standard factory settings are 0.5” w.c. (1.25 mbar) mini-mum and 3.5” w.c. (8.75 mbar) maximum. H-1 models 1.75” w.c. (4.35 mbar) minimum and 11” w.c. (27 mbar) maximum.
At Temperature Selector:
1) Set the selector at least 10º higher than incoming air and allow discharge air temperature to stabilize. Discharge air tempera-ture should agree with temperature selector setting.
2) Increase temperature setting by 5º to 10º. Heater manifold pressure should immediately go to high fire. Manifold pressure will decrease as the discharge air temperature approaches the setting and will stabilize at the temperature setting.
3) Decrease temperature to the original setting. Burner should immediately turn off. Then, as the discharge air temperature decreases, the burner should ignite at low fire or selected high-fire start duration. Refer to Extended High-Fire Ignition section below. The discharge air temperature should again stabilize at the temperature setting.
If the preceding readings are not obtained:
4) Recheck wiring to ensure system is consistent with appropri-ate wiring diagram.
5) Check power source for 24 volts. Power LED is “ON”.6) Some automatic control valves require as much as 20 seconds
to open. In this case, check for voltage output at automatic valve terminals.
NOTE: Depending on the Btu capacity of the heater and the temperature rise, the discharge air temperature may be controlled by a continuous modulated flame (high temperature rises) or by on/off operation (low tempera- ture rises).
5© 2010 Maxitrol Company, All Rights Reserved
High Fire Ignition
J1
J1
J2
TIMER DISABLE
5 Seconds
25 Seconds
STARTTIME
STARTTIME
EXTENDED HIGH-FIRE IGNITION
The high fire start duration is field selectable. Amplifier will hold MR valve in the High Fire position for the set duration.
High-Fire duration of 0 seconds, 5 seconds, 25 seconds. (Times are approximate)
0 Seconds
IMPORTANT: Temperature range on dial must match sensor tem-perature range.
DAT (Discharge Air Temperature) potentiometer is clearly marked on the amplifier PCB. The AD1014U comes with the 55ºF - 90ºF label factory installed.
Following labels are shipped loose with the amplifier and can be field installed:
Label Sensor 55º - 90º * TS114 160º - 210º TS114C 40º - 80º TS114F 90º - 140º TS114G 110º - 160º TS114J * Label factory installed
• Locate desired Label (to match sensor).• Remove amplifier cover if so equipped.• There is no need to remove exisiting dial label.• Make sure dial surface is clean and dry.• Remove adhesive backing from desired label.• Carefully slip label under temperature pointer. Line up with the locating mark on the range being replaced, or with the center leg of the potentiometer.• Set pointers to desired temperature and replace cover if so eqipped.
A1010U LABEL INSTALLATION INSTRUCTIONS
Center Leg Locating Mark
SINGLE FURNACE OPERATION
A1010U
AD1010U
(MR valves and automatic gas valves wired in parallel as shown)
6© 2010 Maxitrol Company, All Rights Reserved
These wiring diagrams are for Series 21 discharge air sensing systems only. The R55 (Zero ohm Jumper) MUST be present on circuit board (located near terminals 5 & 7, outside of cover.)
Common Power Supply
MR VALVES 4 MAX.
24V-100VA
A1010U GAS VALVES (4 MAX.) 3.5 AMPS MAXA1010U
24V-100VA24V-100VA
GAS VALVES (4 MAX.) 3.5 AMPS MAX
A1010U
MULTIPLE FURNACE OPERATION
Wired in Parallel
Independent Power Supply
R55 must be present. *
8
R55 must be present. *
8
R55 must be present. *
8
R55 must be present. * 8
* R55 IS A ZERO OHM JUMPER
Common Power Supply
Common Power Supply
Independent Power Supply
Independent Power Supply
Independent Power Supply
7© 2010 Maxitrol Company, All Rights Reserved
Wired in Parallel
R55 must be present. *
VALVE ADJUSTMENTS
(See bulletin MMR_MT_EN for additional M/MR valve information)
NOTE: High Fire Adjustment should be checked whenever Low Fire Adjustment is changed.
Low Fire Adjustments:
A) Remove Cover (2)
B) Remove maximum adjusting screw (4), spring (5), and plunger (8). A small magnet is useful for this purpose.
C) Using minimum adjusting screw (9), set manifold pres-sure to furnace manufacturer’s specifications.
D) Replace plunger, spring retainer, spring and maximum adjusting screw in proper order.
E) Perform High Fire adjustment.
High Fire Adjustments:
A) Disconnect wire from amplifier terminal 3, remove cover plate (2).
B) Using maximum adjustment screw (4), set manifold pres-sure to furnace manufacturer’s specifications.
C) Reconnect wire to amplifier Terminal 3.
D) Replace cover plate (2) on Modulator-Regulator valve and reconnect wire to amplifier terminal 3.
1
10
9
8
7
6
23
4
5
M/MR Valve Diagram
Top Housing
Cover Plate
Seal Gasket
Maximum Adjustment Screw
Maximum Adjustment Spring
Solenoid
Minimum Adjustment Spring
Plunger
Minimum Adjustment Screw
Minimum Adjustment Screw Stop
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
NOTICE
The plunger is a precision part. Handle carefully to avoid marring or picking up grease and dirt. Do not lubricate.
8Maxitrol Company23555 Telegraph Rd., PO Box 2230Southfield, MI 48037-2230
SEL_21_MI_EN_04.2010
www.maxitrol.com© 2010 Maxitrol Company
All Rights Reserved