37
Fig. 48 - Typical 3- P hase Wiri ng Installed
Terminal Block 4
(TB4)
Heater Cover
Fig. 49 - Heater Wiring
erminal Block 4
(TB4)
Heater Covers
Fig. 50 - Heater Wiring and Covers
Fig. 51 - Max. Air Temp/Max. Ext. Static
UNIT POWER SUPPLY WIRING – ALL
UNITS
NOTE: Installers of unit power supply wiring connecting
to these air conditioning and heat pump units must be
familiar with applicable requirements of the National
Electrical Code (NFPA Standard 70), Articles 440, 430
and 424 dealing with multiple load systems incorporating
refrigeration compressors, motors, and electric heating
equipment. Installers must be familiar with and observe
all local codes regarding unit power supply wiring.
In most instances, adding electric heaters to these units
will result in an increase in unit power supply wire size
compared to base unit electrical loads. These changes may
also impact the size selection of the branch circuit
overload protection device and the unit saf ety disconnect
switch. Check the unit’s informative data label for
minimum wiring sizing ampacity for full combined load
(including power exhaust if also installed) for branch
circuit protection size (a maximum value) and for unit
minimum disconnect switch size.
Table 21 – Infoplate Designation
Device Infoplate Designation
Power Supply Wire MIN CKT AMPS
Branch Circuit P rotection FUSE OR HACR BREAKER
Disconnect Switch MINIMUM UNIT DISCONNECT
40QQ
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