Start-Up; Initial Start-Up; Pressure Drop (Primary Circuit); Recommended Flow Rates - Viessmann Vitocrossal 300 CT3 Series Installation Instructions Manual

Vitocrossal 300, CT3 Series Installation

Initial Start-Up

Flow rate
Legend
A CT3-17 to -22
B CT3-28
C CT3-37 to -57
D CT3-72 to -89

Recommended Flow Rates

Boiler model CT3-
20° F ∆t GPM
40° F ∆t GPM
11° C ∆t L/s
22° C ∆t L/s
 ∆t = temperature difference
 This boiler does not require a flow switch.
17 22 28
61 81 103
31 41 52
3.9 5.1 6.5
2.0 2.6 3.3

Pressure drop (primary circuit)

The Vitocrossal 300 boiler is only suitable for heating
systems with pumped heating water.
For start-up and adjustments, see the service
instructions for boiler, burner and boiler control
unit
CAUTION
Do not fire the burner unless boiler and heating system
are properly filled with water and purged of any air.
37 46
134 166
67 83
8.5 10.5
4.2 5.3

Start-Up

57 72
208 260 323
104 130 162
13.2 16.5 20.4
6.6 8.2 10.3
89
29