Minimum/Maximum Water Content In The System; Expansion Vessel Calibration - AERMEC WRL 200 Technical Manual

11. MINIMUM/MAXIMUM WATER
CONTENT IN THE SYSTEM
WRL
Minimum water content in the system (standard).
Minimum water content in the system for process applications or operation with low load.
Δt Project data less than 5K.
12. EXPANSION VESSEL
CALIBRATION
The standard pressure pre-load value of the
expansion vessel is 1,5bar/21,8PSI, maximum
value is 6bar/87PSI.
The calibration of the vessel must be regulated
in accordance with the maximum level
difference (H) of the user (see diagram) using
the following formula:
p (calibration) [bar] = H [m] / 10.2 + 0.3.
For example: if level difference H
is equal to 20m/65,6ft, the calibration value of
the vessel will be 2,3bar/33,4PSI.
If the calibration value obtained from the
formula is less than 1,5bar/21,8PSI
(i.e. for H < 12.25), use the standard
calibration.
WRL
GEOTHERMAL SIDE EXPANSION VESSEL (standard in versions with pump)
Quantity
Capacity
SYSTEM SIDE EXPANSION VESSEL (standard in versions with pump)
Quantity
Capacity
IWRLPY. 1403. 5890710_01
20
KEY
(1) Check that highest installation is not higher than 55m/180,3ft.
(2) Ensure that lowest installation can withstand global pressure in that position.
Reference operational conditions:
(1) Cooling: Max water temp. = 40°C/104°F, min water temp. = 4°C/39,2°F.
(2) Heating (heat pump): Max water temp. = 60°C/140°F, Min water temp. = 4°C/39,2°F.
PUMPVERSION
B
U
F
I
-
P
N
-
versions U.M. 200
all gal/ton 6,50
all gal/ton 13,01
U.M. 200
1
1
n°
1
1
l/gal 8/2,1
1
n°
1
l/gal 8/2,1
400 500
6,50 6,50
13,01 13,01
400 500
1 1
1 1
1 1
1 1
8/2,1 12/3,2
1 1
1 1
8/2,1 12/3,2