45
Water connections
6.6.3 Sizes 9.1 to 14.1
Depending on the operating conditions, the preset pressure may need to be adjusted on site.
Measure the system height dierence H: the dierence in height in metres between the highest point of the
water circuit and the unit. If the unit is located at the highest point of the system, consider 0m.
Adjust the pressure according to the diagram in the table:
H system
height
dierence [m]
Water content [l]
≤ 230l > 230l
≤ 7m No adjustment required
The pressure of the expansion tank must
be reduced.
Adjust to Pg value
> 7m
The pressure of the expansion tank must
be increased.
Adjust to Pg value
The unit's expansion tank is not sucient,
add an additional tank.
The pressure of all expansion tanks must
be adjusted to the Pg value
The Pg pressure to which the expansion tank should be set can be calculated with the formula:
Pg = 0.3 + (H/10) [bar]
L
NOTE
If the expansion tank pressure needs to be adjusted, contact an authorised technician and use only dry
nitrogen. Inadequate expansion tank pressure adjustment can cause the system to malfunction.
Check that the system complies with the maximum water content (with standard expansion tank only).
To determine the maximum water content of the system that can be managed with the standard expansion
tank alone, use the following graphs:
A2
A1
A1
water only
A2
water + 25% glycol
Fig. 37
To Next Page
Loading...
Need help?
General