Operating instructions

12/23/2011 18 EI711A
Installation Checkout
Insert plenum thermometer 6” to 8” above the electric element section, position to measure the warm air
from the electric elements. Proceed with the following procedure, observing the various staging action,
element power current, and the outlet temperature.
 Turn on system in heat mode and verify proper heat pump and WarmFlo Select operation.
o If it is above 50° F OT, the electric elements may be disabled within the internal logic. In
the next steps the Analyzer can be used to force the OT to a low temperature.
o With this specific controller and system combination it may require manually turning the
heat pump compressor off for this test to prevent hi-limit overheating when both the heat
pump and all stages on simultaneously. Typically the WarmFlo controller would never
have all stages on when the heat pump is producing adequate warm air. The key point of
this checkout is to verify adequate airflow for the specific kW size of the WarmFlo Select
installed.
 Verify controller setup dial switch settings per previous section.
 Using WF Analyzer (or software) set the outside temperature (OT) to 5°F.
o If WF Analyzer is not available, jumper R to E which will also bring on all stages.
Warning – never leave E energized when not present to verify proper blower function
when this bypass is used.
 Initiate thermostat call for heat:
o Verify heat pump is operational and producing heat, not cooling.
 Verify red LED’s are staging in, the system should go to all four stages.
 Verify electric element heating and plenum thermometer temperature is rising.
 With full heat output, wait 5 to 10 minutes to stabilize temperature and take the following
readings:
o Plenum temperature _______
o 240 heating power, voltage _______
o Measured 240 amps, current _______
o Measured 24 transformer voltage _______
 As you perform this test monitor the Hi-Limit LED on the front of the door of the control box.
This LED determines hi-limit cycling. If the red LED came on and you observed hi-limit cycling,
corrective action will be required to make sure hi-limiting does not occur during normal
operation.
o Verify all airflow is through the electric elements (proper baffling, electric element
positioning, etc.)
o Increase airflow or determine ducting distribution problem loading the system.
o Perhaps it can be assumed full electric element heat is not required when the compressor
is running. If this is the decision, change the minimum warm air switch to #4. If this
improves the air delivery situation, provide informational technique to make sure the user
never sets the minimum warm air switch to #5, #6, or #7. If #4 still produced hi-limit, try
#3. For proper heating comfort #3 would probably be the lowest acceptable number.
Again if you cannot sustain non-hi-limiting operation with #3, a serious evaluation of the
basic airflow, blower, ducting system will be required to match your specific kW electric
unit sizing.