raw · articles · ingested 2026-10-18
Zomeworks-Baer Double Play Container — Seasonal Conversion Procedure (David Harrison)
Source: MANUAL
David Harrison’s step-by-step seasonal conversion procedure for the Double Play Container system. Received via email from Bruce Davis on 2026-10-18 as a Word document attachment to David Harrison’s 2026-10-16 message. See provenance email.
Extracted from: Zomeworks-Baer Double Play Seasonal Conversion Proceedure.docx
ZOMEWORKS-BAER
Double Play System Charging and Seasonal Adjustment Procedure
Filling the System
Remove the plumbing plug from the ullage header elbow on the northwest corner of the roof. (This limits the overall fill level which prevents bladder overflow.)
Open the interior ceiling valves at both ends of each bladder. (Do not open the single northwest corner valve which controls seasonal water level for heating mode.)
Connect a garden hose to the fill valve at the southwest corner of the container.
Fill the system with a garden hose.
Fill the system until water overflows the ullage elbow on the roof.
Turn off the water.
Install any plugs or close the valves.
Filling is now complete.
Heating Mode
The solar absorber panels should be full and the valves from the overhead bladders should be open.
Open northwest ceiling water level adjustment valve until the flow stops outside. This drains all water above the bladder float and sets the level.
Close the valve. The heating mode is now set.
Cooling Mode
Remove the roof ullage drain plug or open the valve. Fill the system until water overflows the ullage pipe.
Close the north and south bladder valves.
Replace the ullage plug or close the valve.
Remove the drain plugs on the solar absorber panels. Open the drain cock valve on the southeast ceiling header to assist drainage.
When the panels have drained, close the drain cock.
Replace the absorber drain plugs. Leave them slightly loose so that any remaining water and vapor can escape and not build pressure.
Coasting Mode
Close all bladder valves.
Be certain the absorber panels are drained.
Drain the bladder water level below the bladder raft by opening the inside northwest ceiling valve. When drained, close the valve. The bladders are now in neutral and coasting.
Freeze Caution
Before or during freezing weather, be sure that the bladder water level is below the bladder raft to prevent plumbing freeze damage. Open the ceiling level control valve and drain water until it stops.