12
English
Field Fuses
Size
Wire
Size
De pe nds on furna ce
mode l . Re fe r to
furna ce ma nua l for
prope r fus e
s e l e cti on.
Mus t compl y
wi th
l oca l code s
2-conductor,
s tra nde d,
non-s hi e l de d
coppe r/
PVC or vi nyl ja cke t
AWG
18-16
Power Supply Wiring
(Including ground wire)
Transmission Wiring
Remote Controller Wiring
Outdoor Unit to be
Connected
Res i dentia l VRV
Outdoor unit /
Indoor unit
Maximum 984 ft.
(300m)
(tota l wirei ng
l ength:
1968 ft. (600m)
Indoor unit -
Remote controller
Maximum 984 ft.
(300m)
Length of the Transmission Wiring
and Remote Controller Wiring
Table 2
8.3
SAFETY DEVICE
Every installation must include an NEC (USA) or CEC (Canada)
approved overcurrent protection device. Also, check with local
or state codes for any special regional requirements.
Protection can be in the form of fusing or HACR style circuit
breakers. The Series and Rating Plate provides the maximum
overcurrent device permissible.
When using residual current operated circuit breakers, be sure
to use a high-speed type (0.1 second or less) 30mA rated re-
sidual operating current.
NOTE:
Fuses or circuit breakers are to be sized larger than the
equipment MCA but not to exceed the MOP.
8.4
TRANSFORMER INSTALLATION
Measure the power supply to the gas furnace. Selection of cor-
rect supply voltage for transformer depends on measured power
supply to gas furnace. The supply voltage must be measured
and be in agreement with the equipment’s unit nameplate power
requirements and within the range shown. 24 VAC power volt-
age is supplied to EEV cased coil control board from transformer
supply terminals. See Figure 13. For appropriate wiring identi-
fication and installation for the CXTQ coil, refer to the providied
wiring schematic located on the PCB control panel cover.
EEV Cased Coil 24 VAC
supply voltage
Select single appropriate
power supply
Connect COM to
field common.
Figure 13
The CXTQ cased coil PCB must be supplied 24 VAC supply
voltage from an appropriately powered transformer. A transformer
has been included in the transformer kit with the cased coil.
•
This unit is designed to operate on 24 VAC from provided
transformer. NEVER connect high voltage (120/208/240
VAC) to the CXTQ cased coil directly or to the CXTQ cased
coil control board. Doing so would result in equipment dam-
age and/or personal injury or death.
•
Use designated UL certified transformer included with coil
accessory kit. Do not alter or modify the transformer. At-
tempting to modify or alter the transformer may result in prod-
uct damage or personal injury.
Furnace application requires the use of the multi-tap (120/204/
240) VAC to 24 VAC transformer. Appropriate supply voltage
for multi-tap transformer is based on field wiring. Select from
coil accessory kit the following components:
1.
Multi-tap (120/208/240) VAC to 24 VAC transformer.
2.
Appropriate PCB transformer bracket (see Table 3).
3.
Supplied red/black high voltage transformer power wires.
•
Based on furnace selection, use Table 3 to determine ap-
propriate PCB transformer bracket.
Содержание CXTQ24TASBLUA
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