XLHP™ High Performance Heat Pump Installation and User’s Guide
6
XLHP™ High Performance Heat Pump Installation and User’s Guide
Multiple Unit Installation
1. Heat Pump, Heater and/or Solar Combination
In certain regions of the country it may be more
economical to run a heat pump during the warmer months
and a gas heater during the cooler months. In some
situations it may be desirable to run the heat pump in the
“Chiller” mode, if so equipped, during the hottest portion
of the year and a heater during the cooler months. The
Pentair heat pump may be used in conjunction with a
gas or electric heater or any combination of heat sources
including solar. All heat sources must be plumbed in
series to work correctly and efficiently.
A recommended plumbing layout for a heat pump / heater
/ solar combination heating system for an aquaculture
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.
HEATER
FROM SOLAR
FILTER
S
A
INTAKE
INTAKE
RETURN
RETURN
SP
M
12"
min.
(305 mm)
TANK 1
TANK 2
TANK 2
TANK 1
HEAT PUMP
CHECK
VALVE
FROM SOLAR
TO SOLAR
PUMP
TANK 1
DRAIN
TANK 2
DRAIN
CHECK
VALVE
TANK 2
MAKE-UP
Multiple Unit Installation:
Heater and/or Solar Combination
Water Pressure Switch Adjustment,
Continued
4. Remove the XLHP™ Heat Pump’s left front panel
and remove remaining right front panel. The water
pressure switch is located in the water plumbing in
the lower right corner of the heat pump.
5. Slowly rotate the adjustment wheel on the water
pressure switch in a counterclockwise direction
until the “LOW WATER FLOW” Alarm and red
SERVICE light vanish, time delay countdown will
start.
6. Once the heat pump is running, turn off the filter
pump. The heat pump should turn off immediately.
7. If the heat pump continues to operate when the
filter pump is off, turn the adjustment wheel on
the water pressure switch in a clockwise direction
until the “LOW WATER FLOW” Alarm shows on
the LCD, the red SERVICE light turns ON, and the
heat pump stops.
8. Check the setting of the water pressure switch by
starting and stopping the filter pump and checking
the control panel and operation of the heater
between each flow change.
9. If the water pressure switch cannot be adjusted
to accommodate the conditions listed above,
an external flow switch must be added to the
plumbing system to ensure that the heat pump will
not operate without the proper flow through the
heat exchanger.
2. Multiple Heat Pump Connections
All plumbing on multiple heat pump installations must be
done in parallel (see image below). An equal flow of water
to each heat pump is important for optimum operation.
Note: It may be necessary to adjust the water pressure
switch if a unit is installed below the water level. Refer
back to page 5 for details on when and how to adjust
the pressure switch.
Each heat pump allows a maximum flow rate of
100 gpm (380 lpm) and requires a minimum of 30
gpm (110 lpm).
