Owners Manual - AquaCal
Owners Manual - AquaCal
Owners Manual - AquaCal
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Page 20<br />
4.3.f Water Flow (Pressure) Switch Adjustment<br />
WARNING<br />
- Failure to heed the following may result in injury or death.<br />
Water Pressure Switch adjustment procedure to be performed by experienced<br />
service personnel only; procedure must not be attempted by individuals lacking<br />
adequate electrical and mechanical experience.<br />
CAUTION<br />
- Failure to heed the following may result in equipment damage.<br />
If, after water pressure switch adjustment, the heat pump continues to operate with<br />
water pump off, readjust water pressure switch to ensure heat pump will not run<br />
without water flow.<br />
A water pressure switch adjustment may be required if heat pump operates without sufficient water flow.<br />
Confirm the following before attempting a water pressure switch adjustment:<br />
Water circulator pump is operating.<br />
<br />
<br />
<br />
Filter is clean.<br />
Water valves are set to flow water through the heat pump.<br />
“FLO” code is displayed (or displays intermittently).<br />
Locate Water Pressure Switch:<br />
<br />
<br />
<br />
<br />
Remove heat pump access plate (lower panel - below the control panel access plate)<br />
Locate water pressure switch. The switch will be found attached outside of the electrical enclosure,<br />
at lower edge; exact location will vary by heat pump model.<br />
Identify type of switch to adjust (“Len Gordon” or “TecMark”). To determine which brand pressure<br />
switch is installed compare water pressure switch in heat pump to Figure 22 and Figure 23. Follow<br />
the adjustment procedure for the appropriate switch.<br />
Should adjustment of water pressure switch prove unsuccessful, contact <strong>AquaCal</strong> AutoPilot<br />
Technical Support; site-specific factors may<br />
require the installation of an external flow<br />
switch.<br />
“Len Gordon” Switch:<br />
1) Locate black rectangular plastic tab,<br />
located on forward-facing side of the<br />
switch. See Figure 22. The black<br />
rectangle is a wheel lock tab.<br />
2) Slide tab left to unlock the adjustment<br />
wheel.<br />
3) With water pump operating and<br />
electrical power supplied to the heat<br />
pump, slowly rotate top of adjustment<br />
wheel to the left or right until “FLO” code<br />
(just) disappears.<br />
Rotate top of adjustment wheel to decrease water<br />
pressure required to start heat pump<br />
Tab shown in<br />
un-locked<br />
position<br />
Figure 22<br />
4) Once adjustment has been completed, slide wheel locking tab fully back to right-hand locked<br />
position.<br />
5) With electrical power remaining “ON” and heat pump operating, shut off power to circulating<br />
pump. If switch has been correctly adjusted, heat pump will shut off and “FLO” code will display<br />
when water pump stops.<br />
6) Reinstall heat pump front cover.
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