Manual 2100-380
Page 14
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The “R” terminal is the hot terminal and the “C”
terminal is grounded.
“G” terminal or pin 6 of P4 is the fan input.
“Y” terminal or pin 7 of P4 is the compressor input.
“B” terminal or pin 8 of P4 is the reversing valve input.
The reversing valve must be energized for heating
mode.
“R” terminal or pin 10 of P4 is 24 VAC hot.
“C” terminal or pin 11 of P4 is 24 VAC grounded.
“L” terminal or pin 12 of P4 is compressor lockout
output. This terminal is activated on a high or low
pressure trip by the electronic heat pump control. This
is a 24 VAC output.
“W2” terminal or pin 9 of P4 is second stage heat (if
equipped). If the unit is equipped with an optional hot
water coil plenum box the water valve will be
connected to this terminal.
“O1” terminal of pin 5 of P4 is the ventilation input.
This terminal energizes any factory installed
ventilation option.
“E” terminal or pin 3 of P4 is the emergency heat
input. This terminal energizes the emergency heat
relay.
NOTE: For total and proper control using DDC, a
total of 7 controlled outputs are required (6 if
no ventilation system is installed). For proper
system operation under Emergency Heat
conditions where the compressor needs to be
deactivated, the B-W2-E outputs need to be
energized. Removing the Y (compressor)
signal alone turns the compressor off, but
does not activate the additional circuitry
embedded in the heat pump for proper and
complete operation.
“5” terminal or pin 2 of P4 is the 24 dehumidification
circuit.
“4” terminal of pin 4 or P4 is the dehumidification
circuit.. A contact must connect terminals 4 and 5.
“6” terminal of pin 1 of P4 is VAC grounded to the
humidistat, if needed.
S
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Summary of Contents for QTEC QH602D Series
Page 7: ...Manual 2100 380 Page 5 FIGURE 1 UNITDIMENSIONS MIS 1636...
Page 26: ...Manual 2100 380 Page 24 MIS 1627 FIGURE 17 FRESH AIR DAMPER REMOVAL MOUNTING SCREW...
Page 30: ...Manual 2100 380 Page 28 FIGURE 19 QTEC DEHUMIDIFICATIONMODECIRCUITDIAGRAM MIS 1088...
Page 31: ...Manual 2100 380 Page 29 FIGURE 20 QTEC COOLING MODE CIRCUIT DIAGRAM MIS 1089...
