6
A#new#combination#temperature#and#pressure#relief#valve,#complying#with#the#Standard#for#Relief#
Valves#and#Automatic#Gas#Shut_Off#Devices#for#Hot#Water#Supply#Systems,#ANSI#Z21.22,#is#supplied#
and#must#be#installed#in#the#opening#provided# and#marked#for#the#purpose#on#the#storage#tank.# No#
valve#of#any#type#should#be#installed#between# the#relief#valve#and#the#tank.#Local#codes#shall# govern#the#
installation#of#relief#valves.
!
WARNING:#The#
pressure#rating#of#the#
relief#valve#must#not#
exceed#150#PSI,#the#
maximum#working#
pressure#of#the#storage#
tank#as#marked#on##
the#rating#plate.#
Temperature#and#Pressure#Relief#Valve
Connect(the(outlet(of(the(relief(valve((
to(a(suitable(open(drain(so(that(the(
discharge(water(cannot(contact(live(
electrical(parts(or(persons(and(to(
eliminate(potential(water(damage.(
Piping(used(should(be(of(a(type(
approved(for(hot(water(distribution.(
The(discharge(line(must(be(no(smaller(
than(the(outlet(of(the(valve(and(must(
pitch(downward(from(the(valve(to(
allow(complete(drainage((by(gravity)(
of(the(relief(valve(and(discharge(line.(
The(end(of(the(discharge(line(should(
not(be(threaded(or(concealed(and(
should(be(protected(from(freezing.(
No(valve(of(any(type,(restriction(or(
reducer(coupling(should(be(installed(in(
the(discharge(line.
Vacuum#Relief#Valve
NOTICE:##Do#NOT#
remove#or#tamper#with#
the#vacuum#relief#valve#for#
any#reason.##Doing#so#will#
void#the#manufacturer’s#
warranty.
The(vacuum(relief(valve,(which(must(
be(used(when(installing(the(storage(
tank,(is(factory(installed.
The(cold(water(inlet(has(a(vacuum(
relief(valve(installed.((Certain(
conditions(in(the(field(may(produce(a(
vacuum(or(negative(pressure(condition(
inside(the(storage(tank.((This(negative(
pressure(can(cause(the(tank(to(fail.((
The(vacuum(relief(valve(provides(
a(means(to(eliminate(the(negative(
pressure(or(vacuum(by(admitting(air(
into(the(tank(to(equalize(the(pressure.
It(is(not(recommended(to(pull(a(
vacuum(on(the(unit.
If(a(vacuum(is(pulled(on(the(unit,(
refer(to(the("To(Fill(the(Storage(tank"(
section(to(ensure(the(unit(is(full(of(
water(before(operating.
Installing#the#storage#tank.
NOTICE:#Auxiliary#
catch#pan#MUST#
conform#to#local#
codes.
The(storage(tank(should(not(be(
located(in(an(area(where(leakage(of(
the(tank(or(connections(will(result(in(
damage(to(the(area(adjacent(to(it(or(
to(lower(floors(of(the(structure.(It(is(
recommended(that(a(suitable(catch(
pan,(adequately(drained,(be(installed(
under(the(storage(tank.
Catch(pan(kits(are(available(from(
the(store(where(the(storage(tank(
was(purchased,(or(any(water(heater(
distributor.
Under(no(circumstance(will(the(
manufacturer(be(held(liable(for(any(
water(damage(in(connection(with(this(
storage(tank.
■■■✦■■■
B
A
To(open(drain,(this(line(should(be(at(least(3/4s(ID(and(
pitched(for(proper(drainage.
B(=((Max(2s
A(=((Diameter(of(
storage(tank(
plus(2s(min.
Drain#Pan