Factory-Option Thru-Base Connections (Electrical Connections); Units Without Thru-Base Connections (Electrical Connections) - Bryant Preferred Series Installation Instructions Manual

5. Remove two slot fillers in the bottom of the cover to permit
service tool cords to exit the cover.
6. Check for full closing and latching.
Non-Powered Convenience Outlet
This type requires the field installation of a general-purpose
125-v 15A circuit powered from a source elsewhere in the
building. Observe national and local codes when selecting wire
size, fuse or breaker requirements, and disconnect switch size
and location. Route 125-v power supply conductors into the
bottom of the utility box containing the duplex receptacle.
Unit-Powered Convenience Outlet
A unit-mounted transformer is factory-installed to step down
the main power supply voltage to the unit to 115-v at the du-
plex receptacle. This option also includes a manual switch with
fuse, located in a utility box and mounted on a bracket behind
the convenience outlet; access is through the unit's control box
access panel. See Fig. 30.
The primary leads to the convenience outlet transformer are
not factory-connected. Selection of primary power source is a
customer option. If local codes permit, the transformer primary
leads can be connected at the line-side terminals on the unit-
mounted non-fused disconnect switch; this will provide service
power to the unit when the unit disconnect switch is open. Oth-
er connection methods will result in the convenience outlet cir-
cuit being de-energized when the unit disconnect switch is
open. See Fig. 34.
UNIT CONNECT
VOLTAGE AS
208, 230
240
460
480
Fig. 34 — Powered Convenience Outlet Wiring
Using Unit-Mounted Convenience Outlets
Units with unit-mounted convenience outlet circuits will often
require that two disconnects be opened to de-energize all pow-
er to the unit. Treat all units as electrically energized until the
convenience outlet power is also checked and de-energization
is confirmed. Observe National Electrical Code Article 210,
Branch Circuits, for use of convenience outlets.
Fuse On Power Type
The factory fuse is
non-renewable screw-in (Edison base) type plug fuse.
1. Bussman and Fusetron are trademarks of Cooper Technologies
Company.
PRIMARY TRANSFORMER
CONNECTIONS TERMINALS
L1: RED + YEL H1 + H3
L2: BLU + GRA H2 + H4
L1: RED H1
Splice BLU + YEL H2 + H3
L2: GRA H4
a Bussman "Fusetron"
1
Test the GFCI receptacle by pressing the TEST button on the
face of the receptacle to trip and open the receptacle. Check for
proper grounding wires and power line phasing if the GFCI re-
ceptacle does not trip as required. Press the RESET button to
clear the tripped condition.
FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
This service connection kit consists of a
er fitting (brass), a
/ -in. electrical bulkhead connector, all factory-installed in the
3
4
embossed (raised) section of the unit basepan in the condenser
section. The / -in. bulkhead connector enables the low-voltage
3
4
control wires to pass through the basepan. The
bulkhead connector allows the high-voltage power wires to
pass through the basepan. See Fig. 18 on page 14.
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 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). A hole must be field cut in the main
control box bottom on the left side so the 24-v control connec-
tions can be made. Connect the control power conduit to the
unit control box at this hole.
UNITS WITHOUT THRU-BASE CONNECTIONS
(ELECTRICAL 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 on page 17.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. On 3-phase
units, voltages between phases must be balanced within 2%
and the current within 10%. Use the following formula to de-
termine the percent of voltage imbalance. Operation on im-
proper line voltage or excessive phase imbalance constitutes
abuse and may cause damage to electrical components. Such
operation would invalidate any applicable Bryant warranty.
% Voltage
= 100 x
Imbalance
Example: Supply voltage is 230-3-60
AB = 224 v
A B C
BC = 231 v
AC = 226 v
MOTOR
Average Voltage =
Determine maximum deviation from average voltage.
(AB) 227-224 = 3 v
(BC) 231-227 = 4 v
(AC) 227-226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100x
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
T-15,
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
20
/ -in. NPT gas adapt-
1
2
/ -in. electrical bulkhead connector, and a
1
2
max voltage deviation from average voltage
average voltage
(224 + 231 + 226) 681
=
3 3
4
= 1.78%
227
/ -in. electrical
1
2
= 227