•PROPANE CONVERSION KIT – Contains new orifices and gas valve springs to convert from natural to L.P. gas.
•60ºF GAS HEAT KIT – Provides an electric heat kit for the gas compartment for use in extreme low ambient conditions.
•ECONOMIZER (Downflow and Horizontal flow)
•POWER EXHAUST – (Unit mount – Downflow, Duct mount – Horizontal flow)
•DUAL ENTHALPY KIT - Provides a second input to economizer to monitor return air.
REHEAT MODE SEQUENCE OF OPERATION
The reheat control board allows the user to select two different modes of operation via a jumper connection on the board. (See Figure 3.) Each mode is described below.
“NORMAL” MODE
When the reheat control board (RCB) detects a need for dehu- midification (24VAC) at "HUM" via the field supplied dehumidis- tat connected to
When the room thermostat calls for first stage cooling, with or without a call for dehumidification, the RCB senses a signal through "Y1",
When the room thermostat calls for second stage cooling, the RCB senses a signal through "Y1" & "Y2" and engages circuit #1 and circuit #2 in 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 a call for dehumidi- fication at "HUM".
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.
"ALTERNATE” MODE
When the RCB detects a need for dehumidification (24VAC) at "HUM" via the field supplied dehumidistat connected to
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" and "Y2" and
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 dehu- midification 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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