Figure 5.
Water connection
Installation
WSHP-SVX02E-EN
13
Cleaning and Flushing the Water Loop
After the piping system is complete, the flexible hose
connectors should be doubled back to complete the water
circuit external to the unit (avoiding trash settle-out in the
water coils). Refer to the figure below. An extra pipe may
be necessary to connect the hose kits. Refer to table
Antifreeze requirements based on volume for antifreeze/
water mixture by volume.
1. Water circulation system should be filled with clean
water using the water make up connections.
Note: Air vents should be opened during filling.
2. With the air vents closed, start the circulating pump
and then crack the air vents to bleed off the trapped air,
assuring circulation through all components of the
system.
Note: Make up water must be available to the system to
replace the volume formerly occupied by the air
that is bled off.
3. With the air vented and the water circulating, the entire
system should be checked for leaks with repairs made
as required.
4. Operate the supplementary heat system making
checks per manufacturer’s instructions. During this
operation, visual checks should be made for leaks that
may have occurred due to increased heat. Repair as
required.
5. Open the system at the lowest point for the initial blow
down (making sure the make up water is equal to the
water being dumped). Continue blow down until the
water leaving the drain runs clear, but not less than 2
hours.
6. Shut down pumps and supplementary heat system.
Reconnect the hoses placing the water-to-refrigerant
heat exchanger in the water circulating system.
Note: Vents should be open when the pumps and
supplementary heat system are shut down.
Figure 6.
Flushing water loop
CIRCULATING
PUMP
WATER-SOURCE
HEAT PUMP
CONNECTION
HOSE
GROUND-LOOP
OR
COOLING TOWER/BOILER
TEMPORARY
CONNECTION
FOR SYSTEM
FLUSHING
