Johnson Controls PREMIUM EFFICIENCY VPCS Series, Инструкция по установке, эксплуатации и обслуживанию

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19
SECTION 1 - INSTALLATION
FORM 145.18-IOM2
ISSUE DATE: 06/17/2020
1
ELECTRICAL WIRING
Lock all electrical power supply switches
in the OFF position before installing the
unit. Failure to disconnect power supply
may result in electrical shock or even
death.
Field-Installed Power Wiring
Power wiring to the equipment must conform to Na-
tional Electrical Codes (NEC), local electrical codes,
and must be performed by a licensed electrician.
Provide each unit with its own separate electrical cir-
cuit, means of circuit protection, and electrical discon-
nect switch. Follow current NEC ANSI/NFPA 70, CSA
C22.1 C.E.C. Part 1, and state and local codes.
Failure to provide these shut-off means
could cause electrical shock or fire, re -
sulting in damage, injury, or death.
Use copper conductors only! Failure
to use copper conductors can result in
equipment damage.
Verify that the available unit power supply is compat-
ible with the unit’s nameplate rating. Ensure the break-
er is properly sized as per the nameplate. The line volt-
age supply enters through the right side of the cabinet
at the 7/8-inch power entrance knock-out.
Connect to the line side of the factory-installed termi-
nal block. Unit terminals are not designed to accept
other types of conductors. Failure to use copper con-
ductors may result in equipment damage.
Field-Installed Low Voltage Wiring
Select a location for room thermostat, away from sup-
ply air registers, on draft-free interior wall that is far
from lights, television, direct sunlight, or other heat
sources.
Locate thermostat away from supply
drafts. Ensure the back of the thermostat
is sealed and protected from air drafts.
Short cycling can result in damage to
the unit.
Install the thermostat by connecting the remote ther-
mostat wiring to microprocessor board low voltage
terminal strip. See Figure 9 on page 19 for typical
wiring connections.
Ensure that the control wiring between the thermostat
and the unit’s terminations does not exceed 1 ohm.
Resistance in excess of 1 ohm may cause
component damage due to insufficient AC
voltage supply.
Check all loads and conductors for
grounds, shorts, or miswiring. Do not run
the low voltage wiring in the same conduit
with the high voltage power wiring.
TABLE 4 - TYPICAL WIRE CONNECTIONS
RECOMMENDED WIRE
SIZE (GAUGE)
MAXIMUM LOW
VOLTAGE WIRE LENGTH
(FEET)
20 50
18 75
16 125
LD19520
FIGURE 9 - FIELD WIRING DIAGRAM