Carrier Aquazone 50PTH024 Installation, Start-Up And Service Instructions Manual page 30

CAUTION: UNIT CONTAINS TWO POWER SUPPLIES -
MAKE SURE BOTH ARE OFF BEFORE SERVICING.
7
5
TB1
F1
L1
2
F2
L2
4
3
F3
F4
STANDARD COMPONENTS LEGEND
HLS — High Temp Limit Switch
HT1 — Heater Element 1
HR1 — Heater Contactor 1
OPTIONAL COMPONENTS LEGEND
[ ] F1-4 — Fuses (1-4)
[ ] HR2 — Heater Contactor 2
[ ] HT2-4 — Heater Element (2-4)
[ ] TB1 — Power Terminal Block
BLACK
RED
BLACK
RED
L2 L1
T2 T1
NOTES:
1. See unit name plate for electrical rating.
2. All field wiring must be in accordance with NEC-NFPA #70. Use copper conductors only - Conduc-
teurs en cuivre seulement.
3. 208/230-v units are factory wired for 230-v operation. For 208-v operation, remove lead from 240
terminal and connect it to 208 labeled terminal. Cap all unused terminals.
4. Only heaters 15 - 20 kW are fused.
5. nits equipped with fuses use one-time class K5 fuses rated at 250VAC 30A for 15kW and 60A for
20kW heater packages.
6. Thermostats using W2/E as emergency heat signal must terminate blue W2 wire on HR1 coil for
5kW units.
7. Terminal block used on 5kW/10kW units.only.
Fig. 28 — Electrical Heat Wiring Diagram
HEATER PACKAGE WIRE HARNESS PLUG
CONNECTED TO MAIN CONTROL BOX
NOTE: L1 AND L2 PROVIDE POWER TO
CONTROL TRANSFORMER AND BLOWER MOTOR
WHITE -W1
L2 L1
T2 T1
30
BLUE -W2
GREY -C
6
DENOTES FIELD TERMINATED COMPONENTS
DENOTES OPTIONAL WIRING DENOTES OPTIONAL WIRING