erensan
°
“
The Heating Engineer
”
06042007
13
Their diameters can be calculated by the following formula.
d
f
= 15+1,5*(Q
k
/1000)
½
[mm]
d
g
= 15+(Q
k
/1000)
½
[mm]
Monitor = ½
"
It is strongly recommended to place a circulation connection and tap
between the outflow safety pipe and expansion tank.
No hardware such as valve or check valve that clog the circulation should
be placed on the safety valves.
The volume of the expansion tank is calculated based on the expansion as
a result of the temperature rise of the water in the entire system from
10°C to tm °C. The expansion tank volume in systems with normal hot
water of 90/70 °C
can be taken as Vi = 0,06*V
S
(liter)
Safety Pipe Diameters
Boiler capacity (kcal/h)
DIAMETER
Outflow pipe
Return pipe
25 - 1"
50.000
100.000
32 - 1 1/4"
130.000
209.000
40 - 1 1/2"
280.000
630.000
50 - 2"
550.000
1.230.000
60 - 2 1/2"
900.000
2.000.000
70 1400.000
3.000.000
80 1900.000
4.200.000
90 2500.000
5.600.000
100 3200.000
7.200.000
°
“
The Heating Engineer
”
06042007
14
(V
s
, is the total water amount in the system in liters)
V
S
= W * Qk (liter)
Qk = Boiler heating power (kW)
W= Specific water amount;
When convector is used
: 5.20 lt/kW
When panel radiator is used
: 8.33 lt/kW
When cast radiator is used
: 12.00 lt/kW
With heating from flooring
: 18.50 lt/kw
are the values.
The empirical volume of the expansion tank can be calculated roughly as
follows.
Vi = 0.002 * Qk (liter)
Note: The volumes obtained are the useful volume of the tank, and the
volume of the tank will be taken as 25% above than this volume.
The expansion tanks should conform to TS 713.
(DIN 4806 should be referred to for the matters that are not addressed by
TS 713.)
d1
d2
l3
l2
d2
l1
l2
d2
l3
d2
s
