WATER INLET AND OUTLET CONNECTIONS
CONNECTIONS TO HEAT PUMP
Plumb the ZHP-3216-TI, ZHP-80-TI and ZHP-65-TI heat pump inlet and outlet with schedule 40, 1.5 inch PVC.
MINIMUM/MAXIMUM WATER FLOW RATES
Your heat pump is designed to operate successfully between flow rates of 20 to 70 gallons per minute (GPM). The
plumbing system must be designed to maintain at least 20 GPM flow through the heat pump. At flow rates less than 20
GPM, the heat pump will not operate correctly and may become damaged. At flow rates above 70 GPM, the unit will
operate less efficiently and may become damaged.
A bypass valve (Fig. A) must be installed in order to isolate the heat pump.
We recommend installing a flow
meter between the bypass valve and the heat pump to determine the flow rate and properly adjust the position of the
bypass valve to the ideal range. A spring-check bypass valve is required when a pool pump of 2 HP or larger is used (for
bypass valve placement detail, see plumbing schematic below).
6
MODEL
MINIMUM
IDEAL
MAXIMUM
ZHP-3216-TI
30 GPM
35 GPM
70 GPM
ZHP-80-TI
30 GPM
35 GPM
70 GPM
ZHP-65-TI
20 GPM
35 GPM
70 GPM
ZHP-3216-TI
ZHP-80-TI
ZHP-65-Ti
Top View
CAUTION
Failure to establish proper water flow rates may result in damage to the heat pump and
void the warranty. Many flow meters require a long distance of straight tubing on the inlet
side to offer an adequate measurement.
!
Water Inlet
Water Outlet
Front View
Fig. A
Bypass valve
DO NOT OVERTIGHTEN CONNECTIONS
DO NOT APPLY PRESSURE ON
CONNECTIONS AND TUBING
WARNING
INLET
OUTLET
WINTERIZING HEAT EXCHANGER
GENERAL RECOMMANDATIONS
(CHECK OWNER’S MANUAL)
- TURN OFF THE UNIT
- SHUT OFF THE BREAKER ON THE HEAT PUMP
- UNCONNECT THE WATER INLET AND OUTLET
CONNECTIONS
- IF THE HEAT PUMP IS LEFT OUTSIDE DURING WINTER,
PROTECT IT WITH A WATER PROOF COVER
CAUTION
Zodiac heat pumps are designed to work at a normal operating pressure of 20 PSI (1.4
bars). Maximum pressure is 30 PSI (2 bars). Heat pump installation must be designed to
insure that the maximum operating pressure is not exceeded; otherwise the warranty will
be void.
!
Flow meter
Bypass valve
