Step 8 - Complete Electrical Connections - Carrier Omnizone 50XCW06 Installation Start-Up And Operatig Instructions

Fig. 16 — Typical Fan Discharge Connections for Multiple Fan Units
The 50XCW unit has a drain connection for evaporator conden-
sate. When connecting condensate drains from the unit to floor
drains, sinks, or hoppers, connect drains downstream of trap to en-
sure that condensate does not drain back into the unit.
Make connections through the unit side panel. Some applications
may require connection to either galvanized steel or copper drain
pipe; consult local code requirements for details.
IMPORTANT: NEVER use pipe smaller than
drain run.
Pitch drain pipe downward at a slope of at least
proper drainage. Provide tees plugged on one side for clean outs.
Leave clearance for servicing, and observe all local sanitary codes.
The condensate trap should have a depth adequate to allow 3 in. of
water in the trap (see Fig. 17) with the unit running.
MINIMUM PITCH
1/4 IN. PER
FT OF LINE
OPEN
VENT
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.
Fig. 17 — External Trap Condensate Drain
3 / inch in the
4
1 / in. per ft for
4
TO UNIT
SEE
NOTE
DRAIN
PLUG
A
NOTE: A = min. straight duct length
Step 8 — Complete Electrical Connections
GENERAL
Verify that nameplate electrical requirements match available
power supply. Voltage at condenser must be within the minimum
and maximum shown in Tables 2 and 3 and phases must be bal-
anced within 2%. Contact local power company for line voltage
corrections. Never operate a motor where a phase imbalance in
supply voltage is greater than 2%.
UNBALANCED 3-PHASE SUPPLY VOLTAGE
Use the following formula to determine the percentage of voltage
imbalance.
Percent Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
Determine maximum deviation from average voltage:
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
18
452 + 464 + 455
3
1371
=
3
= 457