ULTRATEMP
®
Heat Pump Installation and User’s Guide
5
Water Connections to the Heat Pump
Two inch Quick Connect fittings have been installed on
the water inlet and outlet connections. Filtered cool water
is plumbed to the inlet, located on the right side of the
UltraTemp
®
Heat Pump. Heated water flows through the
outlet, located on the left side of the heat pump.
Plastic piping (PVC Schedule 40) should be connected
to the heat pump. The unions, provided with the unit,
accept 2 in. PVC pipe.
Always be sure that flow requirements and pool
water turnover rates can be maintained with the
installation of additional heat pumps and plumbing
restrictions.
Water Pressure Switch Adjustment
The pressure switch is preset at the factory for
activation at 1.5 psi [10 kPa]. This factory setting
works for most basic installations. Only adjust the
water pressure switch if the heat pump does not
operate
when the proper flow is applied to unit
or if the heat pump does not shut off when the
filter pump is off. Occasionally, unusual plumbing
configurations or necessary restrictions in the
plumbing may cause pressure sensing problems.
In these rare situations, the plumbing system
configuration may require adjustment of the water
pressure switch.
Adjustment of the pressure switch may be necessary
if any part of the filter system piping is 3 feet [0.91 m]
or more above the top of the heat pump.
In general, if the heat pump is installed more than 6
feet [1.83 m] below the pool surface, an external water
flow switch must be added to the plumbing system.
On some installations, the piping from the heat pump
to the pool is very short. The back pressure could be
too low to trigger the pressure switch. If this happens,
install a directional fitting or elbow where the return
line enters the pool. This will increase back pressure for
the heat pump to operate properly. Be sure to check that
the system flow is above the minimum requirement of 30
gpm (110 lpm) after the directional fitting installation.
Be sure the pool filter is clean before making any
pressure switch adjustment: A dirty filter will restrict
the water flow and the pressure switch cannot be
adjusted properly.
To adjust the pressure switch:
The following adjustment is for installations where
the heat pump is
below
pool water level.
1. Be sure that all valves in the system are set to allow
water flow through the heat pump. Start the filter
pump.
2. Set the heat pump temperature above the actual
temperature to call for heat. Turn the heat Pump ON.
3. Once the heat pump is running, turn off the filter
pump. The heat pump should turn off immediately.
4. If the heat pump continues to operate when the filter
pump is off, then the water pressure switch needs to
be adjusted.
5. Remove the 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.
6. Slowly rotate 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 LED turns ON, and the heat pump
stops.
7. 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.
8. 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.
The following adjustment is for installations where
the heat pump is
above
pool water level.
1. Be sure that all valves in the system are set to
allow water flow through the heat pump. Start the
filter pump.
2. Set the heat pump temperature above the actual
temperature to call for heat. Turn the heat Pump
ON.
3. If the LCD shows a “LOW WATER FLOW” Alarm
and Red Service LED is present then the water
pressure switch needs to be adjusted.
The water pressure switch should be adjusted to
turn the heater off when the pump is off. Setting the
switch to close at too low of a flow can damage the appliance. Adjust the
switch to turn the heater off, not on.
Heat Pump Water Connections
WATER
OUTLET UNION
WATER
INLET UNION
