Carrier 80AWH Series, Installation Manual

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26
English
80AWX- 80AWH
Installation
Unit Dimensions and Weights
See paragraph Features for data.
Controller operation
Input related functions
Miscellaneous
See paragraph Wiring Connection Diagram.
All the input is dry contact.
Input can be independently configured (code 106) to be
considered active when open or when close.
Domestic hot water input
See Domestic hot water function.
Heat / Cool thermostat input
This input can be used to start/stop space heating/cooling
operations.
In case a room thermostat is used, connect it to this input.
Heat / Cool selection input
This input is used to put the system in Heat mode or in Cool
mode.
It is used only if code 106.4 is set to 0.
Whenever the compressor turns off, it stays off for at least
3 minutes.
Additionally the compressor is prevented to start if previous
start happened less then 10 min before.
This time period is referred to as “timeguard”.
It is suggested not to disconnect electrical power, even if
the system will not be used for long time.
To switch OFF the system, put it in OFF mode; this way
system protections are active, improving the lifetime of the
unit.
Hi energy rate input
In case this input is active and a boiler backup is present, the
outdoor unit turns OFF and boiler backup is used to meet
the heating and domestic hot water duty.
It has no effect in Cool mode, unless when domestic hot
water is produced.
System ON/OFF input
This input is used to put the system in OFF mode.