6
DOWN FLOW
BASE KIT (KFACB)
UNIT AGAINST WALL
1/8--IN. THICK ANGLE
MOUNTING BRACKET
(TYPICAL BOTH SIDES)
SECURE FAN COIL TO STRUCTURE
UNIT AWAY FROM WALL
PIPE STRAP
(TYPICAL BOTH SIDES)
OR
SECURE UNIT TO FLOOR
ANGLE BRACKET OR PIPE STRAP
4” MAX
4” MAX
A02003
Fig. 7 -- A--Coil
Step 3—Air Ducts
Connect supply--air duct over the outside of 3/4--in. flanges
provided on supply--air opening. Secure duct to flange, using
proper fasteners for type of duct used, and seal duct--to--unit joint.
If return--air flanges are required, install factory--authorized
accessory kit.
Use flexible connectors between ductwork and unit to prevent
transmission of vibration. When electric heater is installed, use
heat--resistant material for flexible connector between ductwork
and unit at discharge connection. Ductwork passing through
unconditioned space must be insulated and covered with vapor
barrier.
Units equipped with 20--30kW electric heaters require a 1--in.
clearance to combustible materials for the first 36 in. of supply
duct.
Ductwork Acoustical Treatment
Metal duct systems that do not have a 90
_
elbow and 10 ft of
main duct to first branch takeoff may require internal acoustical
insulation lining. As an alternative, fibrous ductwork may be
used if constructed and installed in accordance with the latest
edition of SMACNA construction standard on fibrous glass
ducts. Both acoustical lining and fibrous ductwork shall comply
with National Fire Protection Association as tested by UL
Standard 181 for Class 1 air ducts.
Step 4—Electrical Connections
All products from the factory utilize a printed--circuit board
(PCB) which has a low voltage circuit protective fuse (5 amp),
fan motor speed tap selection terminal (SPT), and time delay
relay (TDR) jumper. To disable the TDR feature, sever the jumper
wire JW1. (See Fig. 8 and 9.)
When a factory--approved accessory control package has been
installed, check all factory wiring per unit wiring diagram and
inspect factory wiring connections to be sure none were loosened
in transit or installation. If a different control package is required,
see unit rating plate.
®
®
CP
C
--E
94V
--0
LR40061
HS
CI
5A
M
P
C
T
G
R
SPT
K1
U1
R7
R9
R10
C8
C7
R2
R3
C3
R6
R11
C4
C6
C5
R8
R5
R4
Q1
C1
C2
F1
JW
1
R1
Z1
D2
D1
NO
NC
FA
N
RELA
Y
C
C
A03010
Fig. 8 -- Fan Coil Printed Circuit Board for FY4A Model
A05181
Fig. 9 -- Fan Coil Printed Circuit Board
for FX4C Model
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
If a disconnect switch is to be mounted on unit, select a
location where drill or fastener will not contact electrical or
refrigerant components.
CAUTION
!
Before proceeding with electrical connections, make certain that
supply voltage, frequency, phase, and ampacity are as specified
on the unit rating plate. See unit wiring label for proper field
high-- and low--voltage wiring. Make all electrical connections in
FX4
C
/F
Y4
A
