Carrier 40FS - Manual (Page 10)

connect blue transformer pigtail to heater line
voltage terminal. See heater label wiring diagram.
Cap unused transformer pigtail.
For splice connections or capping pigtails, use
wire nuts provided: Tape each connection.
Three-speed fan motor on all units (except Model
40FS075) may be connected for high, medium or
low fan speeds as described below. Refer to Table 7
for minimum allowable fan speeds when electric
heaters are used.
Step 11 — Set Fan Motor Speed(s) — High,
medium or low fan speed leads are provided on
motor for choice of fan speeds. Motor leads are
factory connected to fan speed selector block
located on fan housing (Fig. 11 and 13). Selector
block terminal 1 is high fan speed, terminal 2 is
medium fan speed and terminal 3 is low fan speed.
Model 40FS075 utilizes terminals 1 and 2 only.
Line power leads are supplied with cooling
control kit and electric heater for connection to
fan speed selector block as directed in Fig. 13.
Route yellow and black power leads which
extend thru hole in back of cooling control kit to
selector block. Route yellow and black or yellow,
black and red power leads from electric heater thru
power openings (Fig. 15) in bottom of heater
casing and fan section deck to selector block.
One fan speed may be selected for coohng only
unit assembly, heating only or cooling and heating
unit assembly when 40FS916320 or 40FS916500
heater is used.
Two fan speeds may be selected for remaining
combined cooling and heating assemblies; a heating
speed and a cooling speed. (See Table 7 for
Minimum Fan Speeds on heating application.) For
single fan speed operation on these heating only or
heating and cooling assemblies, remove red lead
from heater fan relay terminal 5 or 6. Connect a
black jumper (supplied) between fan relay terminal
6 and fan relay terminal 4 (40FS,FQ916, or
38HQ9000 heaters) or terminal 5 (40FS,FQ920, or
38HQ9001 heaters). Connect black heater lead to
fan speed selector block for speed required. See unit
label diagram for details.
40FQ9I6, OR 38HQ9000
40FS9I6300
,,___, REMOVE
TO FAN CZ]—RED
SELECTOR ADD
BLK ([!□—BLK-
I FACTORY
BLK- I WIRING
40FQ920, OR 38HQ900I
40FS920300
1
factory )
WIRING )
Step 12 — Connect Control Power Wiring
(24-volt) with Cooling Control Kit or Electric
Heater — Use 40- or 60-va transformer supplied
as part of cooling control kit or electric heater
controls as 24-volt supply for system. A one-
transformer control wiring hookup is recommended
for ease of installation. When outdoor unit trans­
former is used together with control kit (or heater)
transformer, a phasing problem may result. If both
transformers are used, also use a thermostat with
isolating contacts to prevent interconnection of
class 2 (24-v) outputs.
10