Plant Loop Issues - Pump availability and heat pump water heater tank

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I have found a temporary solution to this existing issue, but it requires manual edits to the OSM. This could also be done using a Measure.

(1) Add the HPWH to zone equipment (2) Add a water heater tank to the plant loop (3) open the OSM in text editor and delete the water heater tank object associated with the HP (4) change the nodes on the HP to connect to the water heater tank on the plant loop. (5) save and reopen in OS. This will lead to OS correctly matching the tank to the HP

As for the availability manager, you can manually add them to the OS file in a text editor. It requires... (1) creating the differential thermostat object (2) creating the availability manager list object (3) adding this list to the plant loop object

OS:AvailabilityManagerAssignmentList, {c37d0fc6-ae31-4e72-9740-0dbee26f38ba}, !- Handle Plant Loop AvailabilityManagerAssignmentList, !- Name {c37d0fc6-ae31-4e72-9740-0dbee26f38bb}; !- Availability Manager Name 1

OS:AvailabilityManager:DifferentialThermostat, {c37d0fc6-ae31-4e72-9740-0dbee26f38bb}, !- Handle Plant Loop Differential Thermostat, !- Name Node 41, !- Hot Node Node 40, !- Cold Node 10, !- Temperature Difference On Limit {deltaC} 3; !- Temperature Difference Off Limit {deltaC}