Danfoss AFQM 2 Operating Manual page 8

AFQM 2, AFQMP 2
ENGLISH
Safety Notes
Prior to assembly and
commissioning to avoid injury of
persons and damages of the
devices, it is absolutely necessary to
carefully read and observe these
instructions.
Necessary assembly, start-up, and
maintenance work must be performed
only by qualified, trained and authorized
personnel.
Prior to assembly and maintenance work
on the controller, the system must be:
- depressurized,
- cooled down,
- emptied and
- 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 controllers AFQM 2 and AFQMP 2
are used in connection with electrical
actuators AMV(E) 55/56 and 65x for flow
limitation and temperature control of
water and water-glycol mixtures for
heating, district heating and cooling
system.
The technical data on the rating plates
determine the use
Mounting ❶
Permissible Installation Positions
All installation positions are allowed
Electrical actuator
Installation positions for electrical
actuators AMV(E) have to be observed
as well. Please see relevant Data Sheet.
Place and Scheme of Installation ❷
① Return flow
② Supply
Valve Installation ❸
1. Install strainer ① in front of valve.
2. Rinse system before installing valve.
3. Observe flow direction ② on the valve
body.
Flanges ③ in the pipeline system must
be in parallel direction, the sealing
surfaces must be clean and
undamaged.
4. Install valve.
5. Tighten screws crosswise in 3 steps up
to the maximum torque.
8 | © Danfoss | 2020.11
Actuator and Valve Mounting ❹
AMV(E) 55/56
1. Remove the connector ① by release the
bolt of actuator using Allen key 4 mm.
2. Tighten union nut ②, torque 3 Nm.
3. Install the connector ① again to
connect the spindle of actuator and
valve.
Read Instructions of AMV(E) 55/56 for
wiring and setting.
AMV(E) 65X
1. Install the actuator to the valve.
2. Tighten the nuts ② to fix the ring.
3. Connect stems ①.
4. Tigten the connector ① again to
connect the spindle of actuator and
valve.
Read Instructions of AMV(E) 65x for wiring
and setting.
Insulation
❺
DO NOT insulate the electrical
actuator!
The pressure actuator may be
insulated up to a medium temperature of 100 °C.
Leak and Pressure Tests ❻
Prior to pressure tests it is
absolutely necessary to open the
valve.
Non-compliance may cause damages at
the controller AFQM 2/AFQMP 2.
Open valve by means of the actuator:
A
AMV(E) 55/56
Adjust valve position manually using an
Allen key (See instructions of AMV(E) 55/56
for manual operation).
B
AMV(E) 65x
Manual adjustment of the valve depend
on type of the AMV(E) 65x actuator (See
instructions for particular type of AMV(E)
65x for manual operation).
When the impulse tube is installed, the
max. operating pressure of *16 bar
(PN 16) and *20 bar (PN25) must
NOT be exceeded.
*DN depended
Non-compliance may cause leaks at the
actuator.
In case of higher test pressures, remove
impulse tubes ⑧ at the valve.
Close connections at the valve with plug
G1/4 ISO 228 ⑨.
Observe nominal pressure ⑩ of the valve.
Max. test pressure is 1,5 × PN
Filling the System First Start-up ❼
First, ensure that valve is open. To open
the valve see section 5 and read
instructions for relevant type of the
actuator.
The pressure ② at the valve output may
exceed the pressure ① at the valve input
only insignificantly. Non-compliance may
cause damages at the Controller.
Differential Pressure Setting ❽
(only for AFQMP 2)
Set-point range see rating plate ①
2. Set flow rate on a motorized valve part to
about 50 %.
3. Adjustment:
• Turning to the right ② increases the set-
point (stressing the spring)
• Turning to the left ③ reduces the set-point
(un-stressing the spring)
• Set the differential pressure to the level
needed to reach desired maximum flow
4. The set-point adjuster ④ may be sealed.
5. Release the not yet used pointer ⑤, move it
to the set position and fix it with the screw
Flow Limitation Adjustment ❾
The connector between valve and actuator
should be released and the actuator
removed before the adjustment of flow
to prevent any possible damage to the
actuator.
The adjustment of the flow is made by
adjusting the valve stroke.
There are 2 possibilities:
1. Adjustment with adjustment diagram
see ❿ and ⓫.
2. Adjustment with heat meter, see ⓬.
Adjustment with adjustment
diagram ❿ ⓫
The system should not be in operation
for adjustment. Setting curves are of
informative nature. For more exact settings
use flow meter values.
Valve stroke adjustment ❾
1. Close valve by turning the adjusting
screw ① up to its stop.
2. Select diagram below necessary flow.
See AFQM 2/AFQMP 2 adjustment
diagrams ❿ ⓫.
Necessary flow
rate
No
Revolutions of adjust-
ing throttle
AQ30706665741801-010103