Lennox INNOV DM R Series Application Manual page 99

9.6 Recharging with refrigerant R407C
D Connect the tank of refrigerant gas to the male 1/4 SAE inlet situated on the liquid line after discharging a
little gas to eliminate air in the connection pipe.
D Fill with refrigerant in liquid form until you reach 75% of the total charge.
D Then connect to the inlet on the pipe between the thermostatic valve and evaporator and complete the
charging process with the refrigerant in liquid form until no more bubbles can be seen on the liquid level
indicator and the operating parameters specified in section 8 have been reached.
Since R407C is a ternary mixture, charging must take place exclusively with liquid refrigerant to
ensure the correct percentages of the three constituents. Introduce refrigerant through the inlet
in the liquid line.
A unit that was originally charged with R407C in the factory must not be charged with R22 or
other refrigerants without the written authorisation of factory.
9.7 Environmental protection
The law implementing the regulations (reg. EEC 2037/00) which govern the use of ozone-depleting substances
and greenhouse gases bans the dispersal of refrigerant gases in the environment and requires whoever is in
their possession to recover them and, at the end of their useful life, either to return them to the dealer or take
them to a suitable waste disposal facility.
The refrigerant HFC R407C is not harmful to the ozone layer but is included among the substances responsible
for the greenhouse effect and thus falls within the scope of the aforesaid regulations.
Therefore, special care should be taken when carrying out maintenance work to minimise
refrigerant leaks.
INNOV@ CENT -AGU-0912-E . 23 .