Bryant Legacy 549J 12 Series, Руководство по установке

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installed at unit installation. For shipment, the convenience
outlet is covered with a blank cover plate.
The weatherproof cover kit is shipped in the unit’s control box.
The kit includes the hinged cover, a backing plate and gasket.
DISCONNECT ALL POWER TO UNIT AND CONVE -
NIENCE OUTLET.
Remove the blank cover plate at the convenience outlet; dis -
card the blank cover.
Loosen the two screws at the GFCI duplex outlet, until approx -
imately
1
/
2
-in. (13 mm) under screw heads are exposed. Press
the gasket over the screw heads. Slip the backing plate over the
screw heads at the keyhole slots and align with the gasket;
tighten the two screws until snug (do not over-tighten).
Mount the weatherproof cover to the backing plate as shown in
Fig. 32. Remove two slot fillers in the bottom of the cover to
permit service tool cords to exit the cover. Check for full clos -
ing and latching.
Fig. 32 — Weatherproof Cover Installation
FACTORY-OPTION THRU-BASE CONNECTIONS
This service connection kit consists of a
1
/
2
-in. electrical bulkhead
connector and a 1
1
/
2
-in. electrical bulkhead connector, all factory-
installed to the basepan cover plate. Remove the cover plate from
the shipping bracket and attach to basepan with 8 screws provided.
The
1
/
2
-in. bulkhead connector enables the low-voltage control
wires to pass through the basepan. The 1
1
/
2
-in. electrical bulkhead
connector allows the high-voltage power wires to pass through the
basepan. See Fig. 33.
Check tightness of connector lock nuts before connecting elec -
trical conduits.
Field-supplied and field-installed liquid tight conduit connec -
tors and conduit may be attached to the connectors on the base -
pan. Pull correctly rated high voltage and low voltage wires
through appropriate conduits. Connect the power conduit to the
internal disconnect (if unit is so equipped) or to the external
disconnect (through unit side panel). Remove one of the two
knockouts located on the bottom left side of the unit control
box. Use this hole for the control conduit.
Fig. 33 — Thru-Base Connection Fittings
UNITS WITHOUT THRU-BASE CONNECTIONS
1. Install power wiring conduit through side panel openings.
Install conduit between disconnect and control box.
2. Install power lines to terminal connections as shown in
Fig. 26.
FIELD CONTROL WIRING
The 549J unit requires an external temperature control device.
This device can be a thermostat (field-supplied) or the RTU
Open Controller for Building Management Systems (RTU Open
is available as a factory-installed option only).
THERMOSTAT
Select a Bryant-approved accessory 2-stage Cooling/Heating
thermostat. The 549J models do not require a thermostat with
an O function to control the reversing valve operation. If using
an electronic thermostat, configure it for “non-heat pump” op -
eration. Install the accessory thermostat according to installa -
tion instructions included with the accessory.
Locate the thermostat accessory on a solid wall in the condi -
tioned space to sense average temperature in accordance with
the thermostat installation instructions.
If the thermostat contains a logic circuit requiring 24-v power,
use a thermostat cable or equivalent single leads of different
colors with minimum of seven leads. If the thermostat does not
require a 24-v source (no “C” connection required), use a ther -
mostat cable or equivalent with minimum of six leads. See
Fig. 34. Check the thermostat installation instructions for addi -
tional features which might require additional conductors in
the cable.
For wire runs up to 50 ft. (15 m), use no. 18 AWG (American
Wire Gage) insulated wire [35°C (95°F) minimum]. For 50 to
75 ft. (15 to 23 m), use no. 16 AWG insulated wire [35°C
(95°F) minimum]. For over 75 ft. (23 m), use no. 14 AWG in -
sulated wire [35°C (95°F) minimum]. Wire sizes larger than
no. 18 AWG cannot be directly connected to the thermostat and
will require a junction box and splice at the thermostat.
CENTRAL TERMINAL BOARD
The Central Terminal Board (CTB) is a pass-through connec
-
tion point. The CTB provides the capability to add factory-in -
stalled options and field-installed accessories to the units by
cutting jumper wires without having to change or reroute wires
through the structure of the unit. The CTB does not provide
any microprocessor control; it is simply a basic multifunction
wiring terminal configuration.
TOP
TO
P
TOP
WET LOCATIO
NS
W
ET
L
OC
AT
IO
NS
COVER - WHILE-IN-USE
WEATHERPROOF
BASEPLATE FOR
GFCI RECEPTACLE
GASKET
GFCI RECEPTACLE
NOT INCLUDED
LOW VOLTAGE
CONDUIT
CONNECTOR
HIGH VOLTAGE
CONDUIT
CONNECTOR