Carrier 40KMC Series Installation Instructions Manual page 19

a.Use hard p olyvinyl chloride (PVC) pipe material with
nominal IDof1in.toconnect atdrain l ine.Toensure
correct condensate water flow, the pipe s hould have a
gradient of2% without obstruction. See F ig. 3 0
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
The drain tube extension must be securely fastened to the
condensate drain. Failure to do so could result in condensate
water dripping on to the floor.
b. A trap of at least 2 in. (51 mm) in depth should be made
to prevent unpleasant odors from reaching the room.
c. Insulate condensate pipe with condensation proof mater-
ial such as polyurethane, propylene, or neoprene of 3/16
in. to 3/8 in. thickness.
4. Complete Control Wiring
a. Route the control wiring through the 7/8 in. knockouts
on the left or right hand side of the external control box
(low voltage side).
b. Connect R and Y wires to the terminal block for cooling
only units (40KMC) and heat pump units (40KMQ) that
are matched with the 38HDF outdoor units. See Fig. 24.
c. Connect the R, Y, O, G, DT, A, and B wires to the
(PGB-1) 1 terminal on the 40KMQ heat pump indoor
units. See Fig. 25.
5. Perform any modifications required for the accessory user
interface. Three types of user interface can be used with the
unit: Wall mounted wired control, Wireless remote control
and Zone Manager.
a. Wall Mounted Remote Control
The unit comes ready from the factory for use with a
wall mounted wired control. Refer to the installation
instructions of the wired remote control for additional
information. The wall mounted wired control connects
to terminals P, G, and C located in the external control
box. See Fig. 24 and Fig. 25. If there is a desire to
control multiple units (up to 6) from one wired remote
control, the units should be wired as shown in Fig. 31.
Fig. 30 - Condensate Drain Pipe
A07191
UNIT1 UNIT
5
(9
J
UNIT 3 ---
__J5
(9
(9 ®
*@
!
UP TO 6 UNITS
A - MAIN BOARD
(9 " WIRING KIT 33MC9005
(9 " BLACK
(9 " RED
(9 - WHITE
* 100 ohm Resistor
Fig. 31 - Multiple Unit Control Wiring
A09513
19