Ctk04 Addendum - Daikin DZ18VC Series Installation Instructions Manual

CTK04 Addendum

Two Wire Outdoor, Four-Wire Indoor Wiring
Low voltage wiring consists of two wires between the indoor unit and heat pump and four wires between the indoor unit and
thermostat. The required wires are data lines 1 and 2, "R" (24 VAC hot) and "C" (24 VAC common). Never connect the power
wiring to communication terminal (1, 2, R, C).
• For DZ18VC, do not install the 24 Volt Transformer that is inculded with the CTK04 Thermostat in the
Condensing Unit; it is not needed.
• Do not attach any wires to the R & C Terminals on the Condensing Unit, as they are not needed for
inverter unit setup.
• Data line terminals #1 and #2 are polarity sensitive. Only the data lines, 1 and 2, are required between the
indoor and outdoor units.
• Data line terminal #1 from outdoor unit must connect to terminal #1 on indoor unit and data line terminal
#2 from outdoor unit must connect to terminal #2 on indoor unit. Verify wires are not reversed.
• To wire the system components, it is strongly recommended to use the same type and the same gague for
the wires prepared in the field (for best results use 18 AWG).
• It is strongly recommended that you do not connect more than two wires into a single terminal in the field
because there is a rist of the wires becoming loose.
• Calculate the Liquid Line Set length and weigh in 0.6 ounces per foot of R410A refrigerant for any length
over 15 feet.
• Charge by Sub-cooling.
Sub-cooling should be 8°F ± 1°F. After adjusting charge, please allow at least 20 minutes for the system
to stabilize before making further charge adjustment.
IN CASE OF AIR HANDLER
1 2 R
1 2 R
1 2 R
(*) Allowable Maximum Length
ATTENTION INSTALLER - IMPORTANT NOTICE!
Please read carefully before installing this unit.
Communicating Thermostat
C
(In case of CTK04)
125 ft. (*)
Air Handler Blower
C
Integrated Control Module
250 ft. (*)
Outdoor Unit
C
Integrated Control Module
System Wiring
Or
30
IN CASE OF COIL
1 2 R C
1 2 R C
2
1 R C
1 2 R C
(*) Allowable Maximum Length
Com
(In c
125
Case
Integ
Gas
Integ
250
Outd
Integ