38
EGW05-SWHPEG-20140724
TM
TM
POOL WATER PIPING AND INSTALLATION
POOLPAK POOL WATER CIRCULATION LOOP
The PoolPak™ unit pool water condenser (full or partial) must be connected to a secondary circulation loop with its
own circulation pump (field-supplied) to obtain the required design water flows. See
for a typical piping
configuration.
The secondary pool water loop supply must come from the main pool water distribution line, downstream of the main
pool water pump and the pool filter, before the take off to the auxiliary pool water heater. The discharge from this
secondary loop goes back into the primary distribution line downstream of the secondary loop supply and upstream
of the auxiliary pool water heater. This location is required so that the PoolPak™ unit will sense the actual pool water
temperature.
The secondary circulation loop should be located near the main pool water distribution line on the supply line of the
secondary loop feeding the PoolPak™ unit. The pump should be self-priming and vented. The pump should be located at
the lowest point possible in this secondary circulation loop. For example, if the PoolPak™ unit is located on a mezzanine
and the main pump filter are located in the basement below the mezzanine; the second pump should be located in the
basement with the filter, not on the mezzanine with the PoolPak™ unit. Particular attention must be given to venting
when the PoolPak™ unit is installed above the level of the main pool water system. When designing a system that has
over 20 to 30 feet of vertical rise, the system should be considered to be open (size pump accordingly, assuming no
gravitational assistance).
AUXILIARY POOL WATER HEATER (FIELD SUPPLIED)
The auxiliary pool water heater must be installed downstream of the PoolPak™ unit’s secondary loop discharge. It is
normally installed in its own secondary loop as shown in the figure. The auxiliary pool water heater is controlled by the
PoolPak™ System. It is only turned on either when the heat available from the PoolPak™ is insufficient for pool water
heating and pool water temperature drops to 1.5°F below set point or when the pool water flow to the PoolPak™ unit is
below the minimum required water flow.
MAIN POOL WATER PUMP AND POOLPAK POOL WATER LOOP PUMP INTERLOCKS
The main pool water distribution pump and the PoolPak™ pool water loop pump must each have its own start/stop
switch. Wire the main pool water pump’s auxiliary contacts in accordance with the manufacturer’s specifications and run
the wires to the PoolPak™ unit auxiliary pool water loop pump starter. Wire the auxiliary pump so that it operates only
when the main pool water pump operates. This interlocking is necessary to prevent overheating and possible damage to
the pool water piping and PoolPak™ pool water loop pump.
POOL WATER ISOLATION VALVES
Hand stop valves and pressure gauge stopcocks are factory-installed in the pool water supply and return lines inside
the PoolPak™ unit for servicing. A third hand valve (field-supplied) should be installed upstream of the auxiliary pool
water pump so that the pump can be isolated for service. A fourth hand valve (field-supplied), installed in the main pool
water line between the secondary loop supply and return, is normally required to balance the flow in the PoolPak™ unit
secondary loop.
