Bryant T2-NHP Bedienerhandbuch PDF herunterladen (Seite 21)

complete itself. If, through some wiring error or failure in the HP, the signal on

the O line remains for longer than 15 minutes, the thermostat ignores it and

allows Y to be turned of f when it is satisfied.

If the B f unct i on is sel ec te d (using Option 10), the the r m ost at cannot sens e when a

defr ost occur s. As a res ult, i t ca nnot gua ra nt ee that de f rost cycles will run to

completion. If the thermostat becomes satisfied during a defrost, it will turn of f the

compressor . The HP will then complete its defrost starting with the next cycle.

OPERATIONAL AND CONNECTION INFORMATION

Rc/Rh Connections

For installations having a separate 24VAC transformer for heating and cooling,

the R connection can be separated into two connections, one for each

transformer. This allows isolation between the two transformers to be preserved.

To separate Rc from Rh, remove the factory supplied jumper between the Rc and

Rh terminals. The Rh terminal powers the W output. The Rc terminal powers the

Y, G and O outputs.

O/B Terminal -- On HP Thermostat Only

This terminal is normally connected to the reversing valve of the heat pump. It is

called O when the valve is energized in cooling and B when it is energized in

heating. Option 10 of the Configuration Options makes the O/B selection.

Timers

There are several timers which influence the thermostat’s operation:

If any of the timers listed below is preventing the equipment from turning on, the

display icons which show the equipment is operating will be flashing to indicate

a turn--on delay is present.

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Bryant T2-NHP Bedienerhandbuch Seite 21