Envision R-410A Residential Installation Manual

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ENVISION RESIDENTIAL INSTALLATION MANUAL
Microprocessor Control (cont.)
Heat, 3rd Stage (Y1,Y2,W) Dual Capacity Units
The hot water pump is de-energized which directs all heat
tosatisfythethermostat.The1ststageofresistanceheatis
energized10secondsafter“W”input,andwithcontinuous3rd
stage demand, the additional stages of resistance heat engage
sequentiallyevery5minutes.
Emergency Heat (W only)
Thefanisstartedonhighspeed,andtherststageof
resistanceheatisenergized10secondsafterthe"W"input.
Continuing demand will engage the additional stages of
resistanceheatsequentiallyevery2minutes.
Cooling Operation
In all cooling operations, the reversing valve directly
tracks the “O” input. Thus, anytime the “O” input is present,
the reversing valve will be energized.
Cool, 1st Stage (Y1,O)
The blower motor and hot water pump are started immediately,
thelooppump(s)isenergized5secondsafterthe“Y1”inputis
received. The compressor will be energized (on low capacity for
DualCapacityunits)10secondsafterthe“Y1”input.TheECM
blowerwillshiftfromlowtomediumspeed15secondsafterthe
“Y1”input(85%ofmediumspeedifindehumidicationmode).
Cool, 2nd Stage (Y1, Y2, O) Single Speed Units
 Thefanchangestohighspeed(85%ofhighspeedifin
dehumidicationmode)15secondsafterthe“Y2”input(ECMonly).
Cool, 2nd Stage (Y1, Y2, O) Dual Capacity Units
 Thesecondstagecompressorwillbeactivated5seconds
afterreceivinga“Y2”inputaslongastheminimumrststage
compressorruntimeof1minutehasexpired.TheECMblower
changestohighspeed15secondsafterthe“Y2”input(85%of
highspeedifindehumidicationmode).TheComfortAlertwill
delaythesecondstagecompressoruntil5secondsafterit
receivesa“Y2”fromtheboard.
Fan (G only)
The fan starts on low speed (PSC ON). Regardless of fan
input“G”fromthermostat,thefanwillremainonlowspeedfor30
seconds at the end of each heating, cooling or emergency heat
cycle.
ADIPswitchontheEnvisioncontrolallowseldselectionof
15%reducedfanspeedsforcoolinginthedehumidicationmode
or medium and high fan speeds for cooling in the normal mode.
Note: Fan speed can change automatically only with an ECM Motor.
ECM2 Airow Selection DIP Switches (SW1)
A12-positionDIPswitchpackageontheEnvisioncontrol
allowstheairowlevelstobesetforlow,mediumandhighspeed.
(RefertotheECMBlowerTableonpage15.)
Only three of the DIP switches can be in the “on” position.
Therst“on”switch(thelowestpositionnumber)determinesthe
“low speed fan” setting. The second “on” switch determines the
“medium speed fan” setting, and the third “on” switch determines
the“highspeedfan”setting,(seepage15).
Lockout Conditions
During lockout mode, the appropriate unit and thermostat
lockout LEDs will illuminate. The compressor, loop pump, hot
water pump, and accessory outputs are de-energized. Unless the
lockoutiscausedbyanECM2lowRPMfault,thefanwillcontinue
to run on low speed. If the thermostat calls for heating, emergency
heat operation will occur.
Comfort Alert lockouts cannot be reset at the thermostat.
All other lockout modes can be reset at the thermostat after
turning the unit off, then on, which restores normal operation but
keeps the unit lockout LED illuminated. Interruption of power to
the unit will reset a lockout without a waiting period and clear all
lockout LEDs.
High Pressure
This lockout mode occurs when the normally closed safety
switchisopenedmomentarily(setat600PSI).
Low Pressure
This lockout mode occurs when the normally closed low
pressureswitchisopenedfor30continuousseconds(setat40PSI).
A low pressure fault may also be indicated when a Comfort Alert
lockout has occurred.
Freeze Sensing (Water Flow)
This lockout mode occurs when the freeze thermistor
temperature is at or below the selected freeze sensing point (well
30°Forloop15°F)for30continuousseconds.
Condensate Overow
Thislockoutmodeoccurswhenthecondensateoverow
levelhasbeenreachedfor30continuousseconds.
Fan RPM
The control board monitors fan RPM to sense operation.
This lockout mode occurs if the fan RPM falls below the low RPM
limit(100RPM)for30continuousseconds(ICMonly).

Envision R-410A Specifications

General

Brand	Envision
Model	R-410A
Category	Heat Pump
Language	English