[TRNSYS-users] heat pump type668

[berkane ahlem]

dear sirs,
i'am using the type 668 (water to water heat pump ) in trnsys16
coupled with horizontal ground  heat exchange type556 for heating a
storage tank,when i'm using 1-minute  time step and  I'm increasing
pump flow rates The temperature of the outlet load  is set,but I have
a problem with the  values negatives temperature of  outlet source . I
do not know where is the problem exactly
please find the attached program  in trnsys
thanks
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