![background image](http://html.mh-extra.com/html/carrier/weathermaster-48z030/weathermaster-48z030_operation-and-service-manual_2560339170.webp)
170
APPENDIX E — MODE SELECTION PROCESS (cont)
HVAC mode:
("Vent ")
—
This is a normal operation mode where no heating
or cooling is required and outside air is being
delivered to the space to control IAQ levels.
HVAC mode:
("Low Cool ")
—
This is a normal cooling mode when a low cooling
demand exists.
HVAC mode:
("High Cool ")
—
This is a normal cooling mode when a high
cooling demand exists.
HVAC mode:
("Low Heat ")
—
This is a normal heating mode when a low
heating demand exists.
HVAC mode:
("High Heat ")
—
This is a normal heating mode when a low
heating demand exists.
HVAC mode:
("Unocc. Free Cool")
—
In this mode the unit will operate in cooling but
will be using the economizer for free cooling.
Entering this mode will depend on the status of the
outside air. The unit can be configured for outside
air changeover, differential dry bulb changeover,
outside air enthalpy changeover, differential
enthalpy changeover, or a custom arrangement
of enthalpy/dewpoint and dry bulb. See the
Economizer section for further details.
}
NOTE: There is also a transitional mode whereby the machine
may be waiting for relay timeguards to expire before shutting
the machine completely down:
HVAC mode:
("Shutting Down ")
Summary of Contents for WEATHERMASTER 48Z030
Page 103: ...103 Fig 15 Typical Power Schematic Sizes 030 050 Shown a48 8408 ...
Page 104: ...104 Fig 16 Main Base Board Input Output Connections a48 8409 ...
Page 105: ...105 Fig 17 RCB ECB CEM SCB Input Output Connections a48 8410 ...
Page 106: ...106 Fig 18 Typical Gas Heat Unit Control Wiring 48Z055 105 Units Shown a48 8411 ...
Page 107: ...107 Fig 19 Typical Electric Heat Unit Control Wiring 50Z055 105 Units Shown a50 8248 ...
Page 108: ...108 Fig 20 Typical Power Wiring 115 V 48Z Units a48 8412 ...
Page 109: ...109 Fig 21 Typical Power Wiring 115 V 50Z Units a50 8249 ...
Page 110: ...110 Fig 22 Typical Gas Heat Section Size 055 105 Units Shown a48 8413 ...
Page 111: ...111 Fig 23 Component Arrangement Size 030 050 Units ...
Page 112: ...112 Fig 24 Component Arrangement Size 055 070 Units ...
Page 113: ...113 Fig 25 Component Arrangement Size 075 105 Units ...