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Menu 3: Setpoints
Parameter
Project
Value
Parameter
Default
Value
Parameter
Range and Inc rement
Notes
MAT SET 53_F
(12_C)
38 to 65_F;
(3 to 18_C)
increment by 1_
SUPPL Y AIR SETPOINT
Setpoint determines where the economizer will modulate the OA
damper to maintain the supply air temperature.
SeeMenuNote2(onpage34).
LOW T LOCK 32_F
(0_C)
---45 to 80_F
(--- 43 to 27_C)
increment by 1_
COMPRESSOR LOW TEMPERA TURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical
coo l ing c annot be turned on.
DRYBLB SET 63_F
(17_C)
48 to 80_F;
(9 to 27_C)
increment by 1_
OA DR Y BULB TEMP E R ATUR E CHANG E OV ER SETP OINT
Setpoint determines where the economizer will assume outdoor air
temperature is good for free cooling; e.g.: at 63_F(17_C), unit will
economize at 62_F (16.7_C) and below and not economize at 64_F
(17.8_C) and abo v e . There i s a 2_F(1.1_C) dea dband.
SeeMenuNote3(onpage34).
ENTH CURVE ES3 ES1, ES2, ES3, ES4,
or ES5
ENTHALPY CHANGEOVER CURVE
(Requi res enthal py sens o r opt i on)
Enthal py boundar y “curve s ” for ec ono mi zi ng us ing s ingl e enthalpy.
DCV SET 1100ppm 500 to 2000 ppm;
increment by 100
DEM AND CONTROL VENTILA TI ON SETPOI NT
Displays only if CO
2
sens o r i s connect ed. Setpoi nt for Dem and Contr ol
V e nt i l a t i o n of s pace. Above the se t poi n t , t he OA dampers wil l modul at e
ope n to bring i n additio na l OA to m aintai n a s pace ppm lev e l belo w
the setpoint.
MIN POS L 6.0 V 2 to 10Vdc VENTILATION MINIMUM POSITION AT LOW SPEED
DisplaysONLYifaCO2sensorisNOTconnected.
MIN POS H 4.4 V 2 to 10Vdc VENTILATION MINIMUM POSITION AT HIGH SPEED
DisplaysONLYifaCO2sensorisNOTconnected.
VENTMAX L 6.0 V 2 to 10Vdc DCV MAXIMU M DAMPER POSITION AT LOW SPEED
(Requires CO
2
sens o r co nnec t ed)
VENTMAX H 4.4 V 2 to 10Vdc DCV MAXIMUM DAMPER POSITION AT HIGH SPEED
(Requires CO
2
sens o r co nnec t ed)
VENTMIN L 3.7 V 2 to 10Vdc DCV MINIMU M DAMPER POSITION AT LOW SPEED
(Requires CO
2
sens o r co nnec t ed)
VENTMIN H 2.8 V 2 to 10Vdc DCV MINIMU M DAMPER POSITION AT HIGH SPEED
(Requires CO
2
sens o r co nnec t ed)
ERV OAT SP 32_F
(0_C)
0to50_F;
(--- 18 to 10_C)
increment by 1_
ENERGY RECOVERY VENTILATION UNIT OUTDOOR AIR
TEMPERATURE SETPOINT
Onl y w he n AUX1 O = ER V
EXH1 L SET 65% 0 to 100%;
increment by 1
EXHAU ST FAN ST AGE 1 SETPOINT AT LOW SPEED
Set poi nt for OA damper posi ti o n when exhaus t fan1 is power ed by the
economizer .
EXH1 H SET 50% 0 to 100%;
increment by 1
EXHAUST FAN STAGE 1 SETPOINT AT HIGH SPEED
Set poi nt for OA damper posi ti o n when exhaus t fan1 is power ed by the
economizer .
EXH2 L SET 80% 0 to 100%;
increment by 1
EXHAU ST FAN ST AGE 2 SETPOINT AT LOW SPEED
SetpointforOAdamperpositionwhenexhaustfan2ispoweredby
the economizer.
Only used when AUX1---O is set to EHX2.
EXH2 H SET 75% 0 to 100%;
increment by 1
EXHAUST FAN STAGE 2 SETPOINT AT HIGH SPEED
SetpointforOAdamperpositionwhenexhaustfan2ispoweredby
the economizer.
Only used when AUX1---O is set to EHX2.
Staged Air Volume (SAVt) with Variable
Frequency Drive
The Staged Air Volume (SAV) system utilizes a Variable
Frequency Drive (VFD) to automatically adjust the indoor
fan motor speed in sequence with the unit’s ventilation,
cooling and heating operation. Per ASHRAE 90.1 2010
standard section 6.4.3.10.b, during the first stage of
cooling operation the SAV system will adjust the fan
motor to provide two--thirds (2/3) of the design airflow
rate for the unit. When the call for the second stage of
cooling is required, the SAV system will allow the design
airflow rate for the unit established (100%). During the
heating mode, the SAV system will allow total design
airflow rate (100%) operation. During ventilation mode,
the SAV system will operate the fan motor at 2/3 speed.
48HC48LC
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