For Low Pressur
e Steam Service
Note:
When used for Steam Service, BE SURE to use pigtail to prevent
live steam from damaging No. N36-M1.
Maximum Steam Pressur
e:
15psi (103.4 kPa).
Maximum Temperatur
e:
250°F (121°C).
IS-N36-M1 0914
EDP# 1910930
© W
atts 2009
Wa
te
r
Sa
fe
ty
&
F
lo
w
Co
nt
ro
l
Pr
od
uc
ts
USA:
815
Chestnut St.,
No. Andover
, MA
01845-6098; www
.watts.com
Canada:
5435
North Service
Rd., Burlington,
ONT. L7L
5H7; www
.wattscanada.ca
Watts No.
N36-M1
Watts No.
N36-M1
Trap
Trap
Trap
Jacketed
Kettles
Unit Heaters
Pigtail
Pigtail (Not
needed for
pressur
e
under 5 psi).
Watts No.
N36-M1
Low Pressure Steam Heating Systems
Pigtail
Pigtail
Zone Control
Valves
N36-M1 should be
installed on supply
main on system
side of control
zone valve.
Air Vents
Watts No.
N36-M1
Steam Coil Heaters
Pigtails
Heating Coil
Steam Trap
Temp
.
Regulator
Alternate Installation
T&P Relief
Valve
IS-N36-M1
Series N36-M1 and
Series LFN36-M1
Installation Instructions for Water Service
Install No. N36-M1 in cold water supply line with or above the highest point in the tank.
No. N36-M1 must be installed vertically in an upright position as shown. No valve
is to be placed between the relief valve and the tank. Illustrations show typical
and correct positions. V
alve opens on vacuum of not over
1
⁄
2
" mercury column.
Maximum working pressur
e: 200psi (13.8 bar). (Maximum steam working pressur
e:
15psi or 103 kPa.) Maximum temperature: 250°F (121°C).
Caution:
Not Suitable for Cross-Connection Contr
ol.
Table T
op Heaters
Watts No.
N36-M1
Cold
T&P Relief
Valve
Domestic Hot Water Supply T
anks
and Heaters with Top Supply
Watts No.
N36-M1
Tank
Hot
Cold
T&P Relief
Valve
Domestic Hot Water Supply T
anks and
Heaters with Bottom Feed
Watts No.
N36-M1
Tank
T&P Relief
Valve
Hot
Cold
Limited W
arranty:
W
atts
Re
gul
ato
r C
o. (
the
“C
om
pan
y”)
w
arr
ant
s e
ach
pr
odu
ct t
o b
e fr
ee
fro
m d
efe
cts
in
m
ate
ria
l a
nd
wor
km
ans
hip
un
der
nor
mal
us
age
fo
r a
pe
rio
d o
f o
ne
yea
r fr
om
th
e d
ate
of
or
igi
nal
sh
ipm
ent
. I
n th
e e
ven
t o
f s
uch
de
fec
ts
with
in
the
w
arr
ant
y p
erio
d, t
he
Com
pan
y
will, a
t its
option, replace
or recondition
the product
without charge.
THE
W
ARR
ANT
Y S
ET
FOR
TH
HER
EIN
IS
GI
VEN
EX
PRE
SSL
Y A
ND
IS
THE
ON
LY
WAR
RAN
TY
GIV
EN
BY
THE
CO
MPA
NY
WIT
H R
ESP
ECT
TO
TH
E
PRO
DUC
T.
THE
CO
MPA
NY
MAK
ES
NO
OTH
ER
WAR
RAN
TIE
S, E
XPR
ESS
O
R IM
PLI
ED.
T
HE
COM
PAN
Y H
ERE
BY
SPE
CIF
ICA
LLY
D
ISC
LAI
MS
ALL
OT
HER
W
ARR
ANT
IES
, E
XPR
ESS
O
R IM
PLI
ED,
IN
CLU
DIN
G B
UT
NOT
LI
MIT
ED
TO
THE
IM
PLI
ED
WAR
RAN
TIE
S O
F M
ERC
HAN
TAB
ILI
TY
AND FITNESS
FOR A
PAR
TICULAR PURPOSE.
The
re
med
y d
esc
rib
ed
in
the
fir
st p
ara
gra
ph
of t
his
w
arr
ant
y s
hal
l c
ons
titu
te
the
so
le
and
ex
clu
siv
e r
em
edy
fo
r b
rea
ch
of w
arr
ant
y, a
nd
the
Com
pan
y s
hal
l n
ot b
e re
spo
nsi
ble
fo
r a
ny
inc
ide
nta
l, s
pec
ial
or
co
nse
que
ntia
l d
am
age
s, i
ncl
udi
ng
with
out
lim
ita
tio
n, l
ost
pr
ofit
s o
r th
e c
ost
of
repairing or
replacing other
property which
is dama
ged if
this product
does not
work properly
, other
costs resulting
from labor
charges, delays,
vandalism, negligence,
fouling
caused by
foreign ma
terial, dama
ge from
adverse wa
ter conditions,
chemical,
or
any
other circumstances
over
whi
ch
the
Co
mpa
ny
has
no
co
ntro
l.
Thi
s w
arr
ant
y s
hal
l b
e in
val
ida
ted
by
an
y a
bus
e, m
isu
se,
m
isa
ppl
ica
tio
n, i
mpr
ope
r in
sta
lla
tio
n o
r im
pro
per
maintenance or
alteration
of the
product.
Som
e S
tat
es
do
not
al
low
lim
ita
tio
ns
on
how
lo
ng
an
im
plie
d w
arr
ant
y la
sts
, a
nd
som
e S
tat
es
do
not
al
low
th
e e
xcl
usi
on
or
lim
ita
tio
n o
f
inc
ide
nta
l o
r c
ons
equ
ent
ial
da
mag
es.
T
her
efo
re
the
ab
ove
lim
ita
tio
ns
may
no
t a
ppl
y t
o y
ou.
T
his
Li
mite
d W
arr
ant
y g
ive
s y
ou
spe
cifi
c le
gal
rights, and
you may
have
other rights
that
vary
from Sta
te to
State.
Y
ou should
consult applicable
state
laws
to determine
your rights.
SO
FAR
A
S IS
C
ONS
IST
ENT
W
ITH
A
PPL
ICA
BLE
S
TAT
E L
AW
, A
NY
IM
PLI
ED
WAR
RAN
TIE
S T
HAT
M
AY
NOT
B
E D
ISC
LAI
MED
, IN
CLU
DIN
G T
HE
IM
PLI
ED
WAR
RAN
TIE
S O
F M
ERC
HAN
TAB
ILI
TY
AND
FI
TNE
SS
FOR
A
PA
RTI
CUL
AR
PUR
POS
E, A
RE
LIM
ITE
D IN
D
URA
TIO
N T
O O
NE
YEA
R
FROM THE
DATE
OF ORIGINAL
SHIPMENT.
