Reznor FX05 - Unit Status Level

Form CP-MAPS-D12 with FX05, P/N 209341 Rev 4, Page 13
EXAMPLE 2) Neutral Air Application (Space Temperature Override – RH input Jumpered
and Reheat Override)
If space sensible loads increase with outdoor ambient dry bulb, it may be preferred to override reheat mode
by using the roH reheat override in conjunction with space temperature override. Below are the proposed
settings:
dP1 = 58; reheat enabled above 58°F dewpoint
roL = 58; reheat compressor locked out below 58°F dry bulb
oC1 = 68; cooling compressors locked out below 68°F (Assumes reheat pump alone is adequate.)
En1 = 29; 1
st
stage cooling compressor enabled above 29 btu/lb
oH1 = 72; Heating locked out above 72°F ambient
dCH = 62; cooling duct discharge air with reheat overrides (use dCL with outdoor reset)
rSP = 8; The duct discharge air temperature setting with reheat is 70°F (62 + 8).
roH = 92; Reheat mode is disabled over 92°F ambient dry bulb with a supply air temperature of 62°F.
rCP = 55; if the space temperature exceeds the cooling setpoint, reheat is disabled and discharge air is
supplied at 55°F.
In this mode, if the dewpoint is below 58°F, the unit will discharge 62°F air to the space in neutral air mode. If
the dewpoint rises above 58°F, the unit will discharge 70°F air to the space in neutral air mode. If the space
requires cooling, the unit will discharge 55°F air to the space until the space setpoint is satised.
NOTE: If AU25 option is installed, reheat is only available when the rst stage compressor is running. Option
AU25 cannot enable a compressor.
Unit Status Level
> Press FX05 “Enter
Key” for 5 seconds
The Unit Status Mode is helpful in determining the actual control state.
To enable this menu, hold the “Enter” key for 5 seconds. The initial screen text
will appear as “HSP” (working heating setpoint). Scroll through the parameters
(listed below) using the “Up” or “Down” arrow keys. If you would like to view a
parameter setpoint, select the desired parameter and push the “Enter” key once.
HSP
Active Heating Discharge Air Setpoint (Press Enter to view setpoint.)
This is a monitor only parameter used to view the current Working Heating Setpoint. This could be the boost
setup or occupied/unoccupied setpoint and reset based on outdoor dry bulb.
CSP
Active Reheat or Cooling Discharge Air Setpoint (Press Enter to view setpoint.)
This is a monitor only parameter used to view the current Working Reheat or Cooling Setpoint. This could be
the boost setup or occupied/unoccupied setpoint and discharge air reset based on outdoor dry bulb.
HC1
Unit Cooling/Heating Status (Press Enter to view status.)
OFF – No active thermal outputs except blower or Reheat Pump H3 – Unit in the 3rd Heating Stage
PH1 – Pre-purge heating stage 1 C1 – Unit in the 1st Cooling Stage
H1 – Unit in the 1st Heating Stage C2 – Unit in the 2nd Cooling Stage
H2 – Unit in the 2nd Heating Stage C3 – Unit in the 3rd Cooling Stage
oC1
Occupied/Unoccupied Status (Press Enter to view status)
oCC = Occupied ; oFF = Unoccupied; PuP = PreMorning Pull Up; nSu = Night Set Up; nSb = Night Set
Back
RS1
Discharge Air Control Mode (Press Enter to view Discharge Air Control Mode.)
SAC – Space Air Control – Call for Cooling from space
SAH – Space Air Control – Call for Heating from space
DAC – Duct Air Control – No Call for Cooling from space
DAH – Duct Air Control – No Call for Heating from space
RHS
Active Room Heating Setpoint (Press Enter to view setpoint)
RCS
Active Room Cooling Setpoint (Press Enter to view setpoint)