3M Sarns TCM II - Periodic Operator Checks; Alarm Limit Accuracy

3M Sarns TCM II

28 pages

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

20

Maintenance

Periodic

Operator

Checks

The

following

tests

may

be

performed

periodically

between

the

6

month

service

checks

made

by

Sarns

Service.

Temperature

Accuracy

1.

Connect

the

ART

water

In

and

Out

ports

with

tubing

to

make

a

closed

circuit.

2.

Attach

a

Temperature

Probe

and

a

temperature

measuring

device

to

the

closed

circuit.

3.

Set

various

temperatures;

once

each

temperature

is

attained,

compare

the

readings

for

the

Maintain

setting,

the

water

temperature

display,

and

the

measuring

device.

All

temperatures

should

be

within

1°C

of

each

other.

Operating

Modes

1.

Set

a

Maintain

temperature

of

30°C

and

begin

Maintain

mode;

the

water

temperature

display

should

stabilize

at

30°C.

2.

Change

to

Rewarm

mode;

the

water

temperature

should

rise.

3.

Change

to

Cooldown

mode;

the

water

temperature

should

drop.

H20

>

42"C

Warning

1.

Operate

the

unit

in

Rewarm

mode

until

up

to

42°C;

check

with

a

measuring

device

that

the

water

outlet

temperature

remains

below

42°C.

2.

Add

sufficiently

hot

water

to

the

large

tank

to

exceed

43°C;

check

that

the

H20

>

42°C

Warning

LED

lights

and

the

alarm

sounds.

20

Low

Flow

to

Blanket

Warning

If

using

the

Blanket

Supply,

select

Cooldown,

Main-

tain,

or

Rewarm

mode

and

kink

the

tubing

leading

to

the

blanket

In

port;

within

20

seconds,

the

Low

Flow

to

Blanket

LED

should

light.

Unkink

the

tubing

and

the

LED

should

go

out.

Current

Leakage

Maximum

current

leakage

should

not

exceed

100

microamps

when

the

unit

is

in

any

mode.

To

measure

the

current

leakage,

refer

to

Underwriters

Laboratory

or

IEC

Standards

for

the

correct

procedure.

Alarm

Limit

Accuracy

1.

Set

a

low

alarm

for

12°C.

Test

Probes

A,

B,

and

C

by

placing

the

probe

in

ice

cold

water;

the

warning

alarm

should

sound

and

the

probe

LED

flash.

Remove

the

probe

from

the

water

and

the

alarm

should

stop.

2.

Set

a

high

alarm

for

30”C.

Test

Probes

A,

B,

and

C

by

placing

the

probe

in

water

which

is

over

30"C;

the

warning

alarm

should

sound

and

the

probe

LED

flash.

Remove

the

probe

from

the

water

and

the

alarm

should

stop.

Sarns

Service

Checks

It

is

recommended

that

the

entire

system

have

a

maintenance

inspection

every

six

months

to

ensure

proper

operation.

Maintenance

inspections

and

repairs

are

to

be

conducted

only

by

Sarns

Service,

your

local

3M

subsidiary

or

your

authorized

Sarns

distributor.

20