Refrigeration piping, Figure 11. piping connection layout (mccu), Roof penetrations – Heatcraft Refrigeration Products II User Manual
Page 10: Head pressure controls
10
Refrigeration Piping
4”
4”
4”
4”
4”
4”
4”
4”
2 sets of pre-charged line sets from
IMI Cornelius
2 extra circuits for stores that install
additional. 2 or 4 barrel machines
Hard pipe from
MCCU to Bohn
evaporators in ice
vault & vault freezer
1 set of pre-
charged lines
furnished by ice
manufacturer
Hard pipe from
MCCU to vault
cooler
Roof Penetrations
All piping and control wiring penetrations are done underneath the fan section of the condensing unit.
Refer to building plans for job details of roof penetration scheme.
The 4” PVC pipe penetrations shown above is a guide for all parties involved.
Head Pressure Controls
Heatcraft does NOT supply headmaster control for the individual display case circuits.
Refer to case manufacturers’ installation instructions for specific provisions needed for head pressure
control.
Note: Heatcraft does include headmaster controls on the ice machine circuit. If the ice machine equipment
from the vendor includes a headmaster already, it will be necessary to clip the pigtail on the headmaster
valve supplied by Heatcraft to disable it from operating and conflicting with the ice machine headmaster.
Figure 11. Piping Connection Layout (MCCU)******
2 sets hard piped
from MCCU to
sandwich cases