Typical piping and wiring, Application data, Cont) – Carrier ZONE-MIZER 50ME User Manual
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exercise care when selecting this equipment for use with a
multizone. The design and installation of vibration rails on a
Carrier 48MA/50ME should ensure that the interfacing of
the vibration isolator and the curb maintain watertight
integrity.
Thermostat usage and control
Usage — The thermostats used with the 48MA/50ME
units are either a 2-step heat/1-step cool or 2-step heat/
2-step cool. A single module can have only one step of
cooling and heating. When 2 or more modules are grouped
together, use the 2-step heat/2-step cool thermostat.
Application data
(cont)
Modules are grouped together by the installation of
factory-supplied jumpers on the unit zone control board.
The thermostats are automatic changeover with a 3 F
dead spot between heating and cooling. There is a 1 F
differential between the first and second steps of heating or
cooling. Two subbases are available for use with the thermo
stats; one with off-heat-auto.-cool switch and one without
switches for tamperproof installation. The tamperproof
subbase has provisions for locking the thermostat covei
and temperature selectors. Refer to 48MA/50ME wiring
booklet for thermostat wiring connections.
Typical piping and wiring
ROOF
CURB
POWER
SUPPLY
WIRING
EIGHT-ZONE
UNIT SHOWN
ZONE THERMOSTAT
WIRING(24 V)
^CONDENSER AIRFLOW
[^RETURN AIR
I^COOL AIR TO ZONE
I^WARM AIR TO ZONE
GAS CONN
(48MA0NLY)
c>
OUTDOOR MAKEUP AIR
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