Multiple Heater Type Installation; Multiple Heat Pump Installation - Pentair ULTRATEMP HXi Owner's Manual

Installation

Multiple Heater Type Installation

The Pentair UltraTemp heat pump may be used in conjunction with a gas or electric heater or any
combination of heat sources including solar. When using multiple heater types, all heat sources
should be plumbed in series to work correctly and efficiently. A recommended plumbing layout for a
heat pump / heater / solar combination heating system for a pool / spa combination is shown below.
Your system may not contain all of these components, but the basic plumbing will apply by eliminating
the component in the illustration that is not a part of your system. Each heater should be activated
electronically and not operated simultaneously.
POOL
RETURN
SPA
INTAKE

Multiple Heat Pump Installation

When installing multiple heat pumps, they shall be plumbed in parallel in accordance with the below
figure.
250mm
Extend 300mm
past heater inlet
for hydraulic
balancing.
To Pool
GAS
HEATER
POOL
RETURN
S P
SPA
M
MAKE-UP
CHECK
VALVE
SPA FI LTE R
RETURN
POOL
DRAIN A
S
SPA
DRAIN
Figure 8: Multiple Heat Source Configuration
50mm Pipe 50mm Pipe
80mm Pipe
Flow Meter
Ball-valves for bypass
and isolation
Figure 9: Multiple Heat Pumps Configuration
12"
min.
(305 mm)
HEAT PUMP
PUMP
250mm
50mm Pipe
80mm Pipe
Clearance for
service access.
Flow Meter
From Pump/Filter
Page 14
CHECK
VALVE
F R OM SOLAR
FROM SOLAR
TO SOLAR
50mm Pipe
Check vlaves
will help with
Extend 300mm
system balancing
past heater inlet
for hydraulic
balancing.