Nortek T4BD Series Installation Instructions Manual

Split SyStem heat pump
inStallation inStructionS
t4BD - 018, 024, 030, 036, 042, 048, & 060 (1.5, 2, 2.5, 3, 3.5, 4, & 5 ton) Series
important SaFety inFormation ................. 2
heat pump inStallation ................................ 3
General Information ....................................................... 3
Before You Install this Unit ............................................. 3
Locating the Heat Pump ................................................ 3
Packaging Removal ....................................................... 3
Ground Level .................................................................. 3
Rooftop .......................................................................... 3
Connecting Refrigerant Tubing Between the
Indoor & Outdoor Unit .................................................... 4
electrical Wiring ........................................... 4
Pre - Electrical Checklist ................................................ 4
Line Voltage ................................................................... 4
TM
Comfort Alert Diagnostics Module .............................. 5
24VAC Power Wiring ........................................... 5
Thermostat Demand Wiring ................................ 5
Interpreting the Diagnostic LED's ....................... 5
LED Description .................................................. 5
Blower Time Delay Relay ............................................... 6
Thermostat / Low Voltage Connections ......................... 6
Reverse Rotation Verification ......................................... 6
Unbalanced 3-Phase Supply Voltage ............................. 7
Grounding ...................................................................... 7
Startup & aDjuStmentS ............................... 7
Pre - Start Checklist ....................................................... 7
Start-up Procedures ....................................................... 7
Air Circulation - Indoor Blower ....................................... 7
Short Cycle Protection Cooling ...................................... 8
System Cooling .............................................................. 8
System Heating .............................................................. 8
Defrost Cycle Timer ....................................................... 8
Defrost Control Board .................................................... 8
Operational Information ...................................... 8
Normal Defrost Operation ................................... 8
Defrost Test Procedure ....................................... 9
Anti Short Cycle Timer Test ............................................ 9
Refrigerant Charging...................................................... 9
Charging the Unit in AC Mode with
Outdoor Temperatures Above 55° F............................... 9
it is your responsibility to know this product better than your customer. this includes being able to install the product
according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for
the life of the product. Safety should always be the deciding factor when installing this product and using common
sense plays an important role as well. pay attention to all safety warnings and any other special notes highlighted
in the manual. improper installation of the furnace or failure to follow safety warnings could result in serious injury,
death, or property damage.
these instructions are primarily intended to assist qualified individuals experienced in the proper installation of
this appliance. Some local codes require licensed installation/service personnel for this type of equipment. please
read all instructions carefully before starting the installation. return these instructions to the customer's package
for future reference.
Do not DeStroy. pleaSe reaD careFully anD Keep in a SaFe place For Future reFerence.
heat pump maintenance ............................... 9
component FunctionS ................................ 10
charging taBleS - cooling moDe ........... 10
Table 3. Charging Table for 1.5 Ton Units .......... 11
Table 4. Charging Table for 2 Ton Units ............. 11
Table 5. Charging Table for 2.5 Ton Units .......... 11
Table 6. Charging Table for 3 Ton Units ............. 12
Table 7. Charging Table for 3.5 Ton Units .......... 12
Table 8. Charging Table for 4 Ton Units ............. 12
Table 9. Charging Table for 5 Ton Units ............. 13
charging chartS - cooling moDe .......... 13
Figure 4. Charging Chart for 1.5 Ton Units ........ 13
Figure 5. Charging Chart for 2 Ton Units ........... 14
Figure 6. Charging Chart for 2.5 Ton Units ........ 14
Figure 7. Charging Chart for 3 Ton Units ........... 15
Figure 8. Charging Chart for 3.5 Ton Units ........ 15
Figure 9. Charging Chart for 4 Ton Units ........... 16
Figure 10. Charging Chart for 5 Ton Units ......... 16
charging taBleS - heating moDe ............ 17
Table 10. Charging Table for 1.5 Ton Units ........ 18
Table 11. Charging Table for 2 Ton Units ........... 18
Table 12. Charging Table for 2.5 Ton Units ........ 18
Table 13. Charging Table for 3 Ton Units ........... 19
Table 14. Charging Table for 3.5 Ton Units ........ 19
Table 15. Charging Table for 4 Ton Units ........... 19
Table 16. Charging Table for 5 Ton Units ........... 20
electrical DiagramS & taBleS ................ 21
Figure 11. W.D., Single Phase .......................... 21
Figure 12. W.D., Single Ph. w/ Comfort Alert..... 22
Figure 13. W.D., 3-Phase, (208/230V)............... 23
Figure 14. W.D., 3-Phase, (460V)...................... 24
Table 17. Comfort Alert LED Diagnostics .......... 25
Table 18. Module Wiring Troubleshooting .......... 26
inStall. / perFormance checKliSt ......... 28
replacement partS ...................................... 28
important
attention inStallerS:
13 Seer, Single & 3-phaSe moDelS