Twin SANCO2 Plumbing Diagram

Note

A Twin-HPWH install kit is required for installation.

A Twin HPWH system changes the plumbing only around the heat pumps.

• Calculate line effective length: add up the length of 1⁄2” and 3⁄4” pipe from heat pump to Pod/heat pumps, and add 1⁄2 ft per short-radius elbow (large-radius elbows don’t count): this should be 60’ or less. L_Effective(ft) = L_3/4 + 0.5 * (qty 3⁄4” elbows) + L_1/2 + 0.5 * (qty 1⁄2” elbows)
• The effective lengths for each heat pump should be maintained within 10% of each other.
• Install swing check valves on cold side of each 1⁄2” heat pump line
• Install flow meter near pod connection A (on HP cold line) on the common 3⁄4” line, oriented to measure flow out of the pod.
• Install thermistor T6 on the common heat pump hot line
  • Attach thermistor to pipe using foam tape or tie down with zip tie
  • Insulate the thermistor generously to ensure it is not affected by air temperature