York WR 180 User Manual

262292-YTG-C-0707

6

Unitary Products Group

The unit will not operate in the reheat mode if there is any call 
for heating.

On units with economizers, the unit will not operate in the 
reheat mode if there is a call for cooling and the economizer is 
operating as first stage of cooling.

All safety devices function as previously described.

When the RCB detects a need for dehumidification (24VAC) at 
"HUM" via the field supplied dehumidistat connected to RHTB-1 
and RHTB-2, and there is not a call for cooling, it energizes the 
HGR, which energizes the SOL 3, SOL 2, and de-energizes 
SOL 1. The unit then operates with circuit #1 in reheat mode 
and circuit #2 in cooling mode.

When the room thermostat calls for first stage cooling while 
there is still a call for dehumidification, no operational change is 

made. The call for cooling is ignored and the unit continues to 
operate with circuit #1 in reheat mode and circuit #2 in cooling 
mode.

When the room thermostat calls for second stage cooling, the 
RCB senses a signal through "Y1" & "Y2" and de-energizes the 
HGR, which de-energizes SOL 3 and SOL 2, and energizes 
SOL 1.  Both circuits operate in the cooling mode.

Indoor blower operation is initiated upon a call for first stage 
cooling, second stage cooling or dehumidification.

Anytime there is a call for 2 stages of cooling, the unit will not 
operate in the reheat mode, even if there is still a call for 
dehumidification at "HUM".

The unit will not operate in the reheat mode if there is any call 
for heating.

All safety devices function as previously described.

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