18
Since 1965
MicroMetl
Table 11 ─ Menu Structure*
Menu Parameter
Parameter
Default
Value
Parameter
Range and Increment
b
Notes
STATUS
ECON AVAIL NO YES/NO ECONOMIZING AVAILABLE
YES = economizing available; the system can use outside air for free
cooling when required
ECONOMIZING NO YES/NO ECONOMIZING ACTIVE
YES = Outside air being used for 1st stage cooling.
NO = Economizing not active
OCCUPIED NO YES/NO OCCUPIED
YES = OCC signal received from space thermostat
or unitary controller.
YES = 24 Vac on terminal OCC.
NO = 0 Vac on terminal OCC
HEAT PUMP n/a
c
COOL
HEAT
HEAT PUMP MODE
(Not available on 2‒Speed conguration)
COOL Y1─IN OFF ON/OFF FIRST STAGE COOLING DEMAND (Y1---IN)
Y1‒I signal from space thermostat or unitary controller for Cooling Stage 1.
ON = 24 Vac on terminal Y1‒I
OFF = 0 Vac on terminal Y1‒I
COOL Y1─OUT OFF ON/OFF FIRST STAGE COOLING RELAY OUTPUT
ON = 24 Vac on terminal Y1‒O; Stage 1 mechanical cooling called on
OFF = 0 Vac on terminal Y1‒O; no mechanical cooling
COOL Y2─IN OFF ON/OFF SECOND STAGE COOLING DEMAND (Y2---IN)
Y2‒I signal from space thermostat or unitary controller for Cooling Stage 2.
ON = 24 Vac on terminal Y2‒I
OFF = 0 Vac on terminal Y2‒I
COOL Y2─OUT OFF ON/OFF SECOND STAGE COOLING RELAY OUTPUT
ON = 24 Vac on terminal Y2‒O; Stage 2 mechanical cooling called on
OFF = 0 Vac on terminal Y2‒O; no Stage 2 mechanical cooling
MA TEMP nn°F (or °C) 0 to 140°F
( -18 to 60°C)
MIXED AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed/cooled air from MAT sensor in fan section.
Displays ‒ ‒.‒ if not connected, short or out‒of‒range.
DA TEMP nn°F (or °C) 0 to 140°F
( -18 to 60°C)
DISCHARGE AIR TEMPERATURE, after Heating section
(Accessory sensor required)
Displays when Discharge Air sensor is connected and displays measured
discharge temperature.
Displays ‒ ‒ ‒ ‒ ‒ ‒ if sensor sends invalid value, if not connected, short
or out‒of‒range.
OA TEMP nn°F (or °C) -40 to 140°F
( -40 to 60°C)
OUTSIDE AIR TEMPERATURE
Displays measured value of outdoor air temperature.
Displays ‒ ‒ ‒ ‒ ‒ if sensor sends invalid value, if not connected, short
or out‒of‒range.
OA HUM nn% 0 to 100% OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from accessory OA enthalpy sensor.
RA TEMP nn°F (or °C) 0 to 140°F
( -18 to 60°C)
RETURN AIR TEMPERATURE
(Accessory sensor required)
Displays measured value of return air temperature from return air sensor.
RA HUM nn% 0 to 100% RETURN AIR RELATIVE HUMIDITY
(Accessory enthalpy sensor required)
Displays measured value of return air humidity from return air sensor.
IN CO2 ___ppm 0 to 2000 ppm SPACE/RETURN AIR CO2
(CO2 sensor required, accessory or factory option)
Displays value of measured CO2 from CO2 sensor.
Invalid if not connected, short or out‒of‒range
DCV STATUS n/a ON/OFF DEMAND CONTROL VENTILATION STATUS
(CO2 sensor required, accessory or factory option)
Displays ON if IN CO2 value above setpoint DCV SET and OFF if below
setpoint DCV SET.
DAMPER OUT 2.0V 2.0 to 10.0V Displays voltage output to the damper actuator.
0% = OA Damper fully closed
100%= OA Damper full open
ACT POS nn% 0 to 100% Displays actual position of outdoor air damper actuator
2.0V = OA Damper fully‒closed
10.0V = OA Damper full open
ACT COUNT n/a 1 to 65535 Displays number of times actuator has cycled.
1 Cycle equals accrued 180° of actuator movement in any direction
ACTUATOR n/a OK/Alarm
(on Alarm menu)
Displays Error if voltage or torque is below actuator range
EXH1 OUT OFF ON/OFF EXHAUST STAGE 1 RELAY OUTPUT
Output of EXH1 terminal:
ON = relay closed
OFF = relay open
* Table 11 illustrates the complete hierarchy. your menu parameters may be different depending on your configuration.
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