Viessmann Solar-Divicon DN20B Installation, Start-Up And Service Instructions Manual page 8

Solar-Divicon DN20B Installation, Start-up, Service
.
Stainless steel connection pipe available as an option
8
5. Connect the solar station to the system by means
of copper or stainless steel pipes
⑤ Supply from collector field
① Return to the collector field
④ Supply to the storage tank
③ Return from the storage tank
All pipe connections are designed as cutting-ring
compression fitting ¾"" copper pipe. Pipe size can be
reduced to ½" copper if required.
Assembly of the cutting-ring compression fitting:
Push the union nut ② and the cutting ring ③ onto the ¾""

copper pipe ①. The pipe must protrude at least ⅛" (3 mm) from
the cutting ring in order to ensure the force transmission and the
sealing.
 Insert the support sleeve ④ into the copper pipe.
 Insert the copper pipe with the plugged-on individual parts (②,
③ and ④) all the way into the housing of the cutting-ring
fitting ⑤.
 First tighten the union nut ② manually.
Tighten the union nut ② by rotating it by one full turn.

Secure the housing of the cutting-ring fitting ⑤ against distortion
in order to avoid damaging the sealing ring.
6. Connect a discharge line to the connection (1.3) at
the pressure relief valve. Direct the discharge line
into a heat-resistant container. Secure the
discharge line such that in the event of escaping
vapor people in the vicinity are not put at risk.
7. Connect the connecting pipe for the expansion
tank below the pressure gauge (1.5).
8. Adapt the initial pressure of the expansion tank to
the system and connect the expansion tank.
Observe the manufacturer's separate instructions
of the expansion tank! Also observe the layout of
the installation planner.
9.
Check all pipe connections and retighten if
necessary.