Water Hardness; Ph Requirements - Buderus Logano plus GB312 Applications Manual

GB312 Applications Manual

3.3 Water hardness

3.4 Checking the maximum quantity of first-fill
water based on water quality
USER NOTE
If the system capacity exceeds the calcu-
lated allowable water volume V
damage to the boiler can result.
Calculation basis
3
V (ft )= 0.0243
max
Formula for calculating the maximum quantity of
(untreated) water that may be introduced
,
max
× Q
(Btu/h)
Out
CaCO (ppm)
3
955,400 Btu/h
x
V = 0.0243
max
280 ppm
Boiler size
90-4
120-4
160-5
200-6
240-7
280-8
Tab. 5 Boiler output

3.5 pH requirements

_ 
3
= 83 ft
Boiler output Q [Btu/h]
out
122/86°F
307,090
409,460
545,940
682,430
818,910
955,400