Volvo C30 2007 Service And Repair Manual page 427

the heat exchanger pipes through the seal.
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HINT: To facilitate assembling the pipes, lubricate the ends with a little oil.
NOTE: Use new O-rings for the pipe ends.
Install the pipes at the connection to the heat exchanger pipes.
Fig. 57: Identifying Clips
Courtesy of VOLVO CARS CORPORATION
Install the clips so that they lock securely. A click must be heard.
NOTE: The clips only fit one way in the pipe connection.
Fig. 58: Identifying Screws For Cover, Air Duct And Brackets On Both Sides Of Climate Control Units
Courtesy of VOLVO CARS CORPORATION
2012 Volvo C30 T-5
HVAC Climate Units - Removal, Replacement And Installation