LANGUAGE
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-VFGS 2:
• mainvalveassembledwithvalvebody
extension and seal pots,
• throttlingelement,
• impulsetube(throttletosealpotofmain
actuator)
To order additionally:
• pilotvalve,
• pilotvalveactuator,
• sealpotforpilotvalveforT<150°C
• impulsetubesforapilotvalve,
• angetailpieces.
Not included:
• bypasspipes,
• atgaskets,
• screws/nuts.
Bypass pre-assembly ❶
1. Connect a throttling element to the pilot
valveangetoange.
2. Alignowdirection–throttleinfrontofthe
pilot valve.
3. Align valve actuator and throttle impulse
connection as shown on a drawing.
Bypass assembly ❷
1. Prepareangetailpiecesandpipesfor
welding ①.
2. Join bypass pipes to weld tailpieces ②, do
the welding ③.
3. Useatgasketsandscrews/nutstoassemble
bypass pipeline. Align pipes and valve as
shown on a drawing ④.
Holes for bypass ❸
Mark connection points on a main pipe
anddrillholesforbypassow.
Connect bypass ❹
1. Make a join ①.
2. Alignmainandbypassmediaowdirection.
3. Remove main valve and weld bypass pipe to
main pipe ②.
4. Return main valve ❺,checkoworientation.
Main impulse tube mounting ❻
Connect impulse tube from throttling element
to seal pot of a main valve pressure actuator.
Lean impulse tubes into holes on throttle
element and seal pot. Cut one or both ①
to align ②and debur cut edge. Then cut
one or both to align for a joining piece and
debur cut edge ③. Add the joining piece
and tighten all four nuts ④.
Pilot impulse tube mounting ➐
1. Put the steel ring into copper impulse tube
①, press it completely in.
2. Immerse the end into connection screw ②
and tighten with a key ③.
Note:
At max teperatures ≥ 150 °C use a seal pot and connect it
to main flow with stainless steal impulse tube.
Connect pilot valve impulse tubes
for controllers ❽
ENGLISH
Installation Guide Assembly kit PCV-VFGS 2 DN 150-250
ProducedbyDanfossA/S©10/2013
VI.JA.N1.02
