Carrier FZ4ANP, Installation Instructions Manual

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FZ4ANP: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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A03003
Fig. 17 – Condensate Drain
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
( Fig. 17 ). 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.
ACCESSORIES
HUMIDIFIER
Connect humidifier and humidistat to fan coil unit as shown in Fig. 18
and Fig. 19 . The cooling lockout relay is optional.
SEQUENCE OF OPERATION
CONTINOUS FAN
Thermostat closes R to G. G energizes fan relay on PCB which
completes circuit to indoor blower motor. When G is de-energized, there
is a 90 second delay before relay opens.
COOLING MODE
Thermostat energizes R to G, R to Y, and R to O (heat pump only). G
energizes fan relay on PCB which completes circuit to indoor blower
motor. When G is de-energized, there is a 90 second delay before fan
relay opens.
HEAT PUMP HEATING WITH AUXILIARY
ELECTRIC HEAT
Thermostat energizes R to G, R to Y, and R to W. G energizes fan relay
on PCB which completes circuit to indoor blower motor. W energizes
electric heat relay(s) which completes circuit to heater element(s). When
W is de-energized, electric heat relay(s) open, turning off heater
elements. When G is de-energized there is a 90 second delay before fan
relay opens.
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.
A95294
Fig. 18 – Wiring Layout of Humidifier to Heat Pump
A95295
Fig. 19 – Wiring Layout of Humidifier to Fan Coil
with Electric Heat
CAUTION
!
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product or property damage.
Use only full size P-traps in the condensate line (
Fig. 15 ). Shallow
running traps are inadequate and DO NOT allow proper condensate
drainage ( Fig. 16 ).
FILTER
ACCESS
PANEL
SECONDARY DRAIN WITH
APPROPRIATE TRAP REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP)
PRIMARY TRAP REQUIRED
(USE FACTORY KIT OR
FIELD-SUPPLIED TRAP OF
SUFFICIENT DEPTH.
STANDARD P-TRAPS ARE
NOT SUFFICIENT. SEE
FIGURE OF RECOMMENDED
CONDENSATE TRAP)
R
G
C
E
L
O
Y
THERMOSTAT
R
R
C
O
Y
G
C
W
2
W
2
W
2
W
3
E
FAN COIL
(CONTROL)
HEAT PUMP
(CONTROL)
RED
GRY
BRN
WHT
WHT
BLU
VIO
HUMIDISTAT
RELAY
FAN HUMIDIFIER
115V M
R
G
W
Y
THERMOSTAT
R
G
W
2
W
3
E
C
FAN COIL
(CONTROL)
C
Y
AIR COND.
HUMIDISTAT
FAN HUMIDIFIER
115V
RED
GRY
WHT
WHT
BLU
VIO
BRN
M