Twin-SANCO2 Additional Setup Information

a twin sanco2 install kit is required for installation required unit spacing and orientation heat pumps should be located such that the air exhausted from one heat pump is not pulled in by the other (see below) electrical requirements provide a subpanel within reach of the twin sanco2 units in accordance to nec and local codes power supply 240v 1ph 60hz main breaker size 30 a breaker size for each sanco2 unit 15 a functional description this setup enables the twin heat pumps to function as if there was only one heat pump, but with twice the capacity of a normal sanco2 unit the two heat pumps are plumbed in parallel a common 3⁄4” cold supply pipe will run from the pod to a tee with 1⁄2” connections to each heat pump on the hot return, each heat pump plumbs 1⁄2” lines to a combining tee with a 3⁄4” outlet routed to the hot port of the tank additionally, the heat pumps are wired to always run at the same tim e the harvest thermal pod directly controls one heat pump the primary heat pump while the second heat pump is controlled by a current sensing switch this current sensing switch is located only on the power line of primary heat pump, and switches on (turning on sanco2 2) after a minimum amount of current flows to primary heat pump the thermistor connection to primary heat pump will be typical of a harvest thermal single heat pump system, and the secondary heat pump will have a simple resistor installed on its thermistor connection that matches the resistance of the thermistor measuring a “‘cold” tank temperature swing check valves must be installed on the return (cold) side of both heat pumps it is best practice to make the pipe lengths between the tee’s and the heat pumps be as even as possible