Nortek VP7RE Series, Руководство по установке

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• The unit requires both power and control circuit electrical
connections. Refer to the wiring diagrams ( Figure 10 (page
12) & Figure 11 (page 13) ) for identification and location
of unit field wiring interfaces. Make all electrical connections
in accordance with all applicable codes and ordinances.
• Use only copper wire for the line voltage power supply to this
unit. Use proper code agency listed conduit and a conduit
connector for connecting the supply wires to the unit. Use of
rain tight conduit is recommended.
• 208/230 Volt units are shipped from the factory wired for 230
volt operation. For 208V operation, remove the lead from
the transformer terminal marked 240V and connect it to the
terminal marked 208V.
• Optional equipment requiring connection to the power or
control circuits must be wired in strict accordance of the NEC
(ANSI/NFPA 70), applicable local codes, and the instructions
provided with the equipment.
Grounding
WARNING:
The unit cabinet must have an uninterrupted or
unbroken electrical ground to minimize personal
injury if an electrical fault should occur. Do not
use gas piping as an electrical ground!
This unit must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the National
Electrical Code (ANSI/NFPA 70) or CSA C22.1 Electrical Code.
Ground the air conditioning unit using the green grounding screw
provided in the control panel.
Overcurrent Protection
Overcurrent protection must be provided at the branch circuit
distribution panel and sized as shown on the unit rating label and
according to applicable local codes. Generally, the best fuse or
breaker for any heat pump is the smallest size that will permit
the equipment to run under normal usage and provide maximum
equipment protection. Properly sized fuses and breakers also
prevent nuisance trips during unit startup.
NOTE: If a fuse blows or a breaker trips, always determine
the reason. Do not arbitrarily install a larger fuse or breaker
and do not, in any case, exceed the maximum size listed
on the data label of the unit.
Thermostat / Low Voltage Connections
• The unit is designed to operate from a 24 VAC Class II control
circuit. The control circuit wiring must comply with the current
provisions of the NEC (ANSI/NFPA 70) and with applicable
local codes having jurisdiction. Thermostat connections should
Low Voltage
Line Voltage
be made in accordance with the instructions supplied with the
thermostat and the indoor equipment.
• The low voltage wires must be properly connected. Route 24V
control wires through the sealing grommet near the power
entrance. See Figure 7 . Recommended wire gauge and wire
lengths for typical thermostat connections are listed in Table
1 .
• Single stage or two-stage heating thermostats can be used with
this equipment depending on optional accessories installed
with the unit. Select a thermostat that operates in conjunction
with the installed accessories.
• The thermostat should be mounted about 5 feet above the
floor on an inside wall. DO NOT install the thermostat on an
outside wall or any other location where its operation may be
adversely affected by radiant heat from fireplaces, sunlight,
lighting fixtures or convective heat from warm air registers or
electrical appliances. Refer to the thermostat manufacturer’s
instruction sheet for detailed mounting information.
Cooling Only Thermostat
Connect the red & yellow wires from the unit to the R & Y
terminals on the thermostat subbase. Connect the green wire
to the yellow wire at the unit. See Figure 8 .
Heat / Cool Thermostat
For the highest efficiency, the use of a 2-stage Heating/Cooling
thermostat is recommended. The heat/cool thermostat prevents
simultaneous operation of the heating and cooling units and is
equipped with an ON-AUTO fan mode that allows the home owner
to operate the indoor blower when only air circulation is desired.
Connect the red, yellow, green and brown/orange low voltage
wires to the R or RC , Y , G, W or W2 (if applicable) terminals
on the thermostat base. The black wire is the 24 volt common
required on some thermostats. See Figure 8 (page 7) .
Figure 7. Power Entry
Figure 8. Low Voltage Connections
RED
R
YELLOW
Y
GREEN
G
BROWN
*
W1
ORANGE
RED
R
YELLOW
Y
GREEN
G
BROWN
*
W
ORANGE
4 WIRE HEAT/COOL THERMOSTAT
Two Stage Heating T-Stat
Single Stage Electric Heat
RED
R
YELLOW
Y
GREEN
2 WIRE COOLING
(ONLY) THERMOSTAT
CONTROL WIRE LEGEND:
GREEN - Blower Relay
RED - Transformer (24V)
YELLOW - Cooling 1st Stage
BROWN - Heating 1st Stage
ORANGE - Heating 2nd Stage
*
W2
*Connected when Optional Electric Heating Kit is Installed.
Table 1. Control Wiring (24V)
WIRE GAUGE
RECOMMENDED MAXIMUM
WIRE LENGTH (FT) FROM UNIT
TO THERMOSTAT
22 45
20 70
18 115
16 180