Bedienungsanleitung REMKO KWG600 (Seite 28 von 60) (Englisch)

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Diaphragm expansion vessel

To prevent pressure ﬂuctuations

during standstills due to

temperature changes, diaphragm

expansion vessels with a nitrogen

ﬁlling (moisture-neutral) must be

integrated into the system.

The standard version of the

KWG...P, KWG...SP, KWP...P,

and KWP...SP units include a

diaphragm expansion vessel. The

volume of these diaphragm expan-

sion vessels are designed only for

those units. The system requires an

additional diaphragm expansion

vessel designed for this system.

An individual design is required for

the KWG and KWP units.

The calculation can be performed

with roughly 5 to 10% diaphragm

expansion vessel volume of the

system volume.

The pre-pressure of all diaphragm

expansion vessels must be set on

the system.

Safety valve 6.0 bar

Safety valves limit an operating

pressure that is too high due to ex-

cessive heating or an overﬁlling of

the operating medium. The valve

outlet requires a free feed into a

drain line. When glycol is used, the

local disposal regulations must be

observed.

The standard version of the unit

includes a safety valve.

Bleeding valves

The unit has manual bleeding

valves. After the ﬁlling of the

system, the unit can be bled here

separately. In addition, automatic

bleeding valves must be mounted

at the highest point of the collec-

tive line.

When media containing glycol

are used, glycol-resistant

bleeding valves must be used.

ATTENTION

Capacitors

In order not to transmit the

vibrations of the chiller to the

system parts, we recommend the

use of capacitors to connect the

lines to the unit, in addition to

Victaulic connectors.

Capacitors

Shut-off valve Capacitor

Static

fastening

KWG connection

Shut-off valves

In cold water systems, shut-off

valves with full throughput should

fundamentally be used. For

servicing purposes, the medium

inlet and medium outlet must be

equipped with shut-off valves

(with safety valve, if required).

Circulation pump for KWG and

KWG...SP

For units without a storage tank,

an external circulation pump is

required for the implementation

of the nominal volume ﬂow rate

within the chiller!

Actuation takes place via the ter-

minal strip using a controller of the

chiller.

Incorrectly installed or missing

dirt traps can cause a soiling of

the plate heat exchanger.

ATTENTION

Filling and bleeding connection

A connection for bleeding the

pipelines (especially when water

is used as the medium) should be

provided in the anti-frost-protect-

ed area. When glycol is used, the

local disposal regulations must be

observed.

Dirt trap

A rinsable dirt trap must be in-

stalled in front of the unit inlet.

The mesh size should not exceed

10 meshes/cm². Shut-off valves

should be used upstream and

downstream of the dirt trap.

If the minimum medium volume

ﬂow rate of the system is under-

shot, malfunctions may result.

NOTE

Anti-frost protection (accessory)

A water/glycol mixture is usu-

ally used as the medium of a cold

water system. According to the

glycol type and amount used, the

viscosity changes, the pressure

loss increases, and the dissipated

cooling and/or heating capacity

of the unit decreases. All system

components must be released for

use with glycol.

In general, we recommend that

34% ethylene glycol with in-

hibitors for corrosion protection be

added to the water. This concen-

tration guarantees anti-frost safety

up to –20°C; at lower tempera-

tures, an ice slush that no longer

has a bursting effect arises.

If the medium could come into

contact with drinking water or

food, a toxicologically harmless

medium based on propylene glycol

must be preferred.

REMKO KWG

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