COMMISSIONING
6 720 643 603 (2011/11)
17
6.2.6 DETERMINING THE FROST PROTECTION
TEMPERATURE
To determine the degree of frost protection, we
recommend checking the frost protection of the heat
transfer fluid when first putting the system into
operation, by means of a frost protection gauge
(a “Glykomat” or a refractometer). This check should be
repeated at regular intervals (at least every two years).
The usual gauges used to test motor vehicle coolants are
not suitable for this purpose. A suitable device can be
ordered separately.
6.2.7 CORRECTING FROST PROTECTION
If the minimum frost protection level is not being
maintained, more heat transfer fluid concentrate must
be added.
B Use Tab. 7 to determine the volume of the system, so
that you can calculate the exact amount to be added
(which is equal to the amount which first needs to be
drained out).
B Use the following formula to determine the amount of
concentrate to be added (V
replace
) in the case of a pre-
mixed 45/55 heat transfer fluid mixture:
Fig. 19 Formula for calculating the amount of fluid to be
replaced for a heat transfer fluid with 45 % glycol
Example using Tyfocor L with 45 % glycol:
• System volume (V
total
): 22 l
• Frost protection (recorded value): – 14 °C
• Equals concentration (Æ Tab. 7): 29 % (C = 30)
• Result: V
replace
= 4.7 litres
B Drain the calculated amount to be added (V
replace
)
and add concentrate.
6.3 ADJUSTING THE FLOW RATE
The flow rate is set when the system is cold (30 - 40 °C).
• When the solar pump is speed-controlled, the
controller determines the flow rate based on
operating requirements.
B Set ball valves (1) to 0° (gravity brakes ready for
operation).
B Using a size 4 Allen key, open the flow limiter (2)
completely.
B Select the operating mode “Manual mode ON” on the
controller (Æ instruction manual for the controller).
Fig. 20
1 Gravity brake ready for operation
2 Adjusting screw on the flow limiter
3 Indication point for the flow rate
4 Pump switch on the solar pump
B For the required flow rate, see Tab. 7.
CAUTION: Frost damage
B Every two years, check whether the
required frost protection level (to at least
–25 °C) is being maintained.
System part Volume
1 Solar-Lito Mini collector 0.62 l
1 Solar-Lito collector 0.80 l
1 Solar-Lifestyle collector portrait 0.94 l
1 Solar-Lifestyle collector landscape 1.35 l
1 Solar-Lux 6 collector 0.97 l
1 Solar-Lux 12 collector 2.12 l
1 one-line solar heating station 0.20 l
1 two-line solar heating station 0.50 l
1 m Cu pipe Ø 15 mm 0.13 l
1 m Cu pipe Ø 22 mm 0.31 l
1 m Cu pipe Ø 28 mm 0.53 l
1 m Cu pipe Ø 35 mm 0.86 l
1 m Cu pipe Ø 42 mm 1.26 l
1 m steel pipe R ¾ 0.37 l
1 m steel pipe R 1 0.58 l
1 m steel pipe R 1¼ 1.01 l
1 m steel pipe R 1½ 1.37 l
Tab. 7 Volume of the separate system parts
V
replace
V
total
45 c
concentration
–
100 c
concentration
–
-------------------------------------------------------------
×=
7747006489.37-1.SD
3
2
1
L/min
0,5
7
6
5
4
3
2
1
7
6
5
4
1
0,5
20
0
40
60
°C
80
100
120
20
0
40
60
°C
80
100
120
4
To Next Page
Loading...
