Maintaining Ability To Winterize; Water Flow Rates And Operating Pressures; Water Flow (Pressure) Switch Adjustment - Aquacal Great Big Bopper Operation And Installation Manual

4.3.f Maintaining Ability to Winterize
CAUTION - Failure to heed the following may result in equipment damage.
The unions allow for easy disconnection and re-connection of the heat pump from/to the plumbing
system during hard freeze conditions. Do not defeat the function of the unions by using glue on the
threaded portion of the unions.
4.3.g Water Flow Rates and Operating Pressures
CAUTION - Failure to heed the following may result in equipment damage.
The Great Big Bopper heat pump is designed to operate with a flow rate of 200-280 gallons-per-minute
(GPM). Design the plumbing system to maintain at least 200-GPM flow through the heat pump under
worst case conditions (i.e.: filter fouled to 10 PSI rise). These specifications relate to the heat pump
only. Code-specified whole system turnover rates must be satisfied.
4.3.h Water Flow (Pressure) Switch Adjustment
WARNING - Failure to heed the following may result in injury or death.
WARNING - Failure to heed the following may result in injury or death.
CAUTION - Failure to heed the following may result in equipment damage.
If the heat pump abnormally turns on without water flow, a water pressure switch adjustment may be
required. Confirm the following before attempting a water pressure switch adjustment:
Water circulator pump is operating.
Filter is clean.
Water valves are set to flow water through the heat pump.
"FLO" code is displayed (or displays intermittently).
Locate Water Pressure Switch:
Remove heat pump access plate (lower panel - below the control panel access plate)
Locate water pressure switch. The switch will be found attached outside of the electrical
enclosure, at lower edge; exact location will vary by heat pump model.
Identify type of switch to adjust ("Len Gordon" or "TecMark"). To determine which brand pressure
switch is installed see Figure 13 and Figure 14. Follow the adjustment procedure for the
appropriate switch.
Do not use glue on the threaded portion of the equipment's unions. A glued-in-
place union will prevent the Great Big Bopper from being properly winterized.
Water flow exceeding 280-GPM may damage titanium condenser; such damage
will NOT be covered under the equipment warranty. Install a bypass valve
whenever water flow rate may exceed 280-GPM. Contact AquaCal AutoPilot
Technical Support for guidance regarding testing for water flow rate. The
maximum static (or operating pressure) is 50 pounds-per-square-inch (PSI).
Water Pressure Switch adjustment procedure to be performed by experienced
service personnel only; procedure must not be attempted by individuals lacking
adequate electrical and mechanical experience.
Beware of ROTATING FAN PROP HAZARD. Fan may start during water switch
adjustment. Keep hands clear of fan blade at all times.
If, after water pressure switch adjustment, the heat pump continues to operate
with water pump off, readjust water pressure switch to ensure heat pump will not
run without water flow.
Page 19