Danfoss PCV-VFG 21 Bedienungsanleitung

Installation Guide

District Energy VI.JA.L1.02 DEN-SMT/SI

Assembly kit PCV-VFG 21 DN 100-125

◯

A+◯

◯

A+◯

❶❷

①

②

❸➍

min 300 min 300

②

Throttling element

①

◯

Cu pipe

Ø 6 × 1 × 1500 mm

Cu pipe

Ø 10 × 1 × 3000 mm

Pilot controller

AVP DN 25

Assembly kit valve unit

PCV-VFG 21 DN 100-125

Cu Ø 10 × 1

❺

❻

Cu Ø 10 × 1

②

①

③

Installation Guide Assembly kit PCV-VFG 21 DN 100-125

DEN-SMT/SI VI.JA.L1.02 District Energy

Cu Ø10 × 1

Cu Ø6 × 1

➐

PCVD

Main controller

Pilot controller

Trottling

element ◯

PCVSD

Main controller

Pilot controller

Trottling

element ◯

PCVA

Main controller

Pilot controller

Trottling

element

◯

PCVSA

Main controller

Pilot controller

Trottling

element

◯

PCVQ

Main controller

Pilot controller

Trottling

element

◯

PCVP

Pilot controller

Trottling

element

Main controller

◯

Installation in the supplay pipe

◯

A◯

Main controller

Trottling

element

Installation in the return pipe

Pilot controller

PCVP

Installation Guide Assembly kit PCV-VFG 21 DN 100-125

District Energy VI.JA.L1.02 DEN-SMT/SI

Safety Note

To avoid injury and damage to persons

and devices, it is absolutely necessary

these instructions are carefully read and

observed prior to assembly and commissioning.

Necessary assembly, start-up, and maintenance

work must be performed only by qualiﬁed,

trained and authorised personnel.

Prior to assembly and maintenance work on the

controller, the system must be:

- depressurized

- cooled down

- emptied

- cleaned

Please comply with the instructions of the

system manufacturer or system operator.

Disposal instruction

This product should be

dismantled and its components

sorted, if possible, in various

groups before recycling or

disposal.

Always follow the local disposal regulations.

Deﬁnition of Application

The controller is used for diﬀerential

pressure control of water and water glycol

mixtures for heating, district heating and

cooling systems.

The technical data on the rating plates

determine the use.

Scope of Delivery

Assembly kit PCV-VFG21:

main valve, throttling element, impulse

tube (throttle to main actuator)

To order additionally:

pilot valve, impulse tube set and thread tail

pieces for pilot valve.

Not included:

bypass pipes

Bypass pre-assembly ❶

Remove ﬂat gaskets from tailpieces before

welding.

Welding: tailpiece to bypass pipe 2x, tail piece

to tailpiece 1x. Make a joint (A) ﬁrst and then do

welding (B).

Return ﬂat gaskets to tailpieces.

Bypass assembly ❷

Connect a throttling element to the pilot

valve ①using welded tailpieces: align

ﬂow direction – throttle in front of the pilot

valve. Align valve actuator and throttle

impulse connection as on drawing.

Connect bypass pipes ②: align pipes and

valve as on drawing.

Holes for Bypass ❸

Mark connection points on a main pipe

and drill holes for bypass ﬂow.

Connect bypass ❹

Make a join ①. Align main and bypass

media ﬂow direction. Remove main valve

and weld bypass pipe to main pipe.

Return main valve ❺, check ﬂow

orientation. Connect impulse tube from

throttling element to main valve pressure

actuator.

Impulse Tube mounting ❻

Put the steel ring into copper impulse tube ①,

press it completely in②. Immerse the end into

connection screw ③and tighten with a key ④.

Connect pilot valve impulse tubes for

controllers ➐

ENGLISH

Installation Guide Assembly kit PCV-VFG 21 DN 100-125

VI.JA.L1.02 Produced by Danfoss A/S © 10/2013

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