Installation Of Tank And Collector; Installation Of Makeup Tank; Procedure For Filling Secondary Circuit In 2-C Systems; Quantity Of Dm Water/Glycol Mixture Required For 2-C Systems - Bosch FCB 120-1V-NB User Manual & Installation Manuallines

Thermosiphon systems
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9.0 Installation and Commissioning of 2-C Systems (Pressurized & Non Pressurized)
Note: For schematic layout please refer enclosed annexure 3.

9.1 Installation of Tank and Collector

Installation of mounting structure and collector for 2-C systems is similar to normal system. Refer section 5 for
details.
9.2 Installation of Make-up tank.
Polymer tank of 3L capacity will be provided along with installation kit for all 2-C systems.
Connect the ¾" MS Elbow provided in the kit to pipe indicated as " Glycol Filling Inlet"
Fix the polymer makeup tank to the elbow securely.

9.3 Procedure for filling Secondary circuit in 2-C systems

Use only De- Mineralized (DM) Water OR Distilled water for filling the Secondary circuit. When
system is installed in high altitudes, where minimum ambient temperature is less than 5 deg C, use
mixture of glycol and DM water in 1:1 ratio
Complete all the connections as per the schematic. Cover the collectors with opaque sheet
Fill the water into the primary circuit (Main tank) from the cold water inlet pipe.
Disconnect the hot water rising pipe from the tank and hold it in upward direction.
Remove the Air release plug provided at the top of the tank.
Fix the funnel on the top of the tank and start filling the DM water / Water glycol mixture till the air inside
the system is vented out and water flows over the disconnected hot water rising pipe.
Connect back the hot water rising pipe into the tank. Continue filling till the water reaches the maximum
level (¾" level) of the makeup tank and close the lid of the tank.
9.4
Approximate DM water / Glycol mixture required
System
Jacket volume
capacity
in litres
100-2C
5
125-2C
6
200-2C
8
250-2C
11
300-2C
16
500-2C
26
 Ensure the water level is between maximum & minimum marking. Do not fill the
tank completely with water / glycol mixture.
 Check the level of water/glycol periodically and top up if required
 Ensure no leakage though any of the joints
Collector
volume in litres
3
3
6
6
9
12
Make up tank &
connections volume in litres
6
6
8
8
10
12
Max Level (¾"of the tank)
Min Level (¼"of the tank)
Fig 24
~ Total volume of DM
water required in litres
14
15
22
25
35
50
16

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