Spartherm Selection Instrucciones De Montaje página 85

A = Temperature sensor for thermal discharge safety device 1/2" female thread
B = Temperature sensor for thermostat switch 1/2" female thread
C = Return pipe 3/4" female thread
D = Supply pipe 3/4" female thread
E = Safety valve 3 bar
F = Vent
G = Pump thermostat switch (e.g. JUMBO, heat THERM)
H = Return temperature booster
I = Connection to heating system
J = Buffer tank
K = Return temperature booster (e.g. ESBE; Type LTC 141)
L = Circulation pump
M = Filling / draining valve
N = Diaphragm expansion tank
O = Thermal discharge safety device (e.g. Watts STS 20/200)
P = Free discharge. e.g. into sewer
Q = Discharge" safety heat exchanger 1/2" female thread
R = "Inlet" safety heat exchanger 1/2" female thread
S = Vent 3/8"
The integration of an accumulator tank into the system is abso-
lutely necessary. The 1st BImSchV is definitive in determining the
required volume for the accumulator tank. The guidelines in this
ordinance state that a volume of 55 litres per kW of water heating
power is to be provided in the accumulator tank. In the case of the
SENSO M H O, this represents: 5.0 kW x 55 litres/ kW = 275 litres.
2
Because this is not a standard market size, the next largest accu-
mulator tank with a volume of 300 litres should be selected.
The following example calculation can be used to provide assi-
stance in determining the required volume of the accumulator tank:
The following assumptions have been made here:
• Size of accumulator tank: 300 litres (around 300 kg of water)
• Water temperature in the accumulator tank at start: 30°
• Water temperature in the accumulator tank at end: 60°
• Temperature difference 30° (corresponds to 30 K)
• No heat extraction from the accumulator tank during the
heating process using the SENSO M H
Q = c p × m × Δ t
Q = 4 , 1 8 7
Q = 3 7 6 8 3 k J
GB 31
O
2
k J
× 3 0 0 k g × 3 0 K
k g × K
GB