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1
•
Reheat – The type of reheat used. Choices are:
None - No reheat installed.
One - A single stage of heat (default on minidap4).
1-Elect - A single stage of reheat used only in dehumidification mode.
HW Valve - (Not shown on IRDX Model). A hot water valve is used for heating.
The valve is modulated using the SCR algorithm on Y4. Notice: A discharge air
temperature sensor must be installed to select this mode.
Two - (Not shown on IRDX Model or MiniDAP). Two stages of heat.
Three - (Not shown on IRDX Model or MiniDAP). Three stages of heat (default
on large dap4).
3-Elect - (Not shown on IRDX Model or MiniDAP). Three stages of reheat used
only in dehumidification mode.
HGRH - Hot Gas valve (analog output Y1) is modulated by a PID algorithm to
maintain temperature of the discharge air during dehumidification only.
HGRH+1 – Like HGRH mode but has an additional electric heat output HT3
(DO11) that turns on when temperature drops below setpoint minus heat dead
band (when dehumidifying or not).
Dual HGRH – Like HGRH mode but has a second HGRH coil for C2 (Y2).
Enable Rotation: (Only displayed when there is more than one stage of electric
reheat). Default setting is that FIFO rotation is enabled.
Lead Reheat: (Only displayed when rotation is enabled) indicates the current lead
reheat stage. You can also manually change which one is the lead.
Delay After DX: (Only displayed if DX is enabled). This delay prevents heating
from running right after a compressor finished cooling. Range of adjustment is 0 to
100 mins, with a default of 10 mins.
Enable SCR Y4: This enables the SCR modulation (Y4) for heat. Output Ht2 is
used to energize the SCR module.
SCR Band: (Only displayed when SCR is enabled). This setting determines how
far below set point minus dead band temperature can drop until the SCR
modulation will reach 100%. Range of adjustment is 1 to 20°F with a default of 1°F.
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