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9

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in product or

property damage.
Shallow running traps are inadequate and DO NOT allow

proper condensate drainage. (See Fig. 22.)

CAUTION

!

DO NOT USE SHALLOW RUNNING TRAPS!

A03013

Fig. 22 -- Insufficient Condensate Trap

NOTE

: When connecting condensate drain lines, avoid blocking

filter access panel, thus preventing filter removal. After connection,
prime both primary and secondary condensate traps.

NOTE

: If unit is located in or above a living space where damage

may result from condensate overflow, a field--supplied, external
condensate pan should be installed underneath the entire unit, and a
secondary condensate line (with appropriate trap) should be run
from the unit into the pan. Any condensate in this external
condensate pan should be drained to a noticeable place. As an
alternative to using an external condensate pan, some localities
may allow the use of a separate 3/4--in (19 mm) condensate line
(with appropriate trap) to a place where the condensate will be
noticeable. The owner of the structure must be informed that when
condensate flows from the secondary drain or external condensate
pan, the unit requires servicing or water damage will occur.
Install traps in the condensate lines as close to the coil as possible.
(See Fig. 21.) Make sure that the outlet of each trap is below its

connection to the condensate pan to prevent condensate from
overflowing the drain pan. Prime all traps, test for leaks, and

insulate traps if located above a living area. Condensate drain lines
should be pitched downward at a minimum slope of 1--in (25 mm)

for every 10--ft (3 m) of length. Consult local codes for additional

restrictions or precautions.

Step 8 — Accessories

A. Electronic Air Cleaner

The Electronic Air Cleaner may be connected to fan coil as shown

in Fig. 23. This method requires a field supplied transformer. See
Electronic Air Cleaner literature for kit requirements.

R

FAN RELAY

NO

230VAC

COM

NC

NO NC

SPT

WIRE

NUT

TO
BLOWER
MOTOR

CONVERSION KIT

TRANSFORMER

FROM MOLEX

PLUG AND

TRANSFORMER

(IN UNIT)

TO EAC

208/230VAC

COM

24VAC

COM

208/

230

COM

CONTROL BOARD

G T C

C

C

A03011

Fig. 23 -- Wiring Layout of Electronic Air Cleaner to Fan Coil

for FY5B Models Only

FB

4C

/F

Y5

B

Summary of Contents for fb4c

Page 1: ...ost serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation ELECTRICAL OPERATION HAZARD Fa...

Page 2: ...E A07565 Fig 1 Slope Coil Unit in Upflow Application B Downflow Installation In this application field conversion of the evaporator is required using accessory downflow kit along with an accessory base kit Use fireproof resilient gasket 1 8 to 1 4 in 3 to 6 mm thick between duct unit and floor UNIT OR PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or property damage Th...

Page 3: ...er kit instructions 8 Align holes with tubing connections and condensate pan connections and reinstall access panels and fitting panel Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating Install after brazing COIL MOUNTING SCREW BLOWER ASSEMBLY REFRIGERANT CONNECTIONS SECONDARY DRAIN PRIMARY DRAIN DRAINPAN SLOPE COIL SKI COIL SUPPORT RAIL A03001 Fig 5 ...

Page 4: ...3 mm thick right angle brackets Attach brackets to fan coil using no 10 self tapping screws and to wall stud using 5 16 in lag screws See Fig 8 Step 3 Air Ducts Connect supply air duct over the outside of 3 4 in 19 mm 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 facto...

Page 5: ...ard power plug from fan coil and connect male plug from heater to female plug from unit wiring harness See Electric Heater Installation Instructions For units without electric heater 1 Connect 208 230v power leads from field disconnect to yel low and black stripped leads 2 Connect ground wire to unit ground lug NOTE Units installed without electric heat should have a field supplied sheet metal blo...

Page 6: ... this caution may result in product or property damage If W2 W3 and E on any 3 stage heater 18 20 24 or 30kW are individually connected as with outdoor thermostats or any other situation emergency heat relay must be used This relay is in kit Part No KHOT0201SEC and is normally used with kit Part No KHAOT0301FST for 2 outdoor thermostat systems CAUTION The controls are factory circuited for single ...

Page 7: ...ctory default position and move to desired speed tap 1 2 3 or 5 Speed taps 1 2 and 3 have a 90 second blower time delay pre programmed into the motor Speed tap 4 is used for electric heat only with 0 second blower time delay and the WHITE wire must remain on tap 4 Speed tap 5 is used for high static applications but has a 0 second blower time delay pre programmed into the motor see Table 1 FB4C Ai...

Page 8: ...y exit the fitting to retain the low leak rating of the unit UNIT OR PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or property damage The conversion of the fan coil to downflow requires special procedures for the condensate drains on both A coil and slope units The vertical drains have an overflow hole between the primary and secondary drain holes This hole is plugged...

Page 9: ...sate will be noticeable The owner of the structure must be informed that when condensate flows from the secondary drain or external condensate pan the unit requires servicing or water damage will occur Install traps in the condensate lines as close to the coil as possible See Fig 21 Make sure that the outlet of each trap is below its connection to the condensate pan to prevent condensate from over...

Page 10: ... electric heat relay s open turning off heater elements When G is de energized there is a 90 sec delay before fan relay opens D Electric Heat or Emergency Heat Mode Thermostat closes R to W W energizes electric heat relay s which completes circuit to heater element s Blower motor is energized through normally closed contacts on fan relay When W is de energized electric heat relay s opens START UP ...

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