Install Electrical Connections - Carrier Comfort 50ES-A Installation Instructions Manual

Refrigeration and Air Conditioning Engineers (ASHRAE)
recommendations.
3. Use flexible transition between rigid ductwork and unit to
prevent transmission of vibration. The transition may be
screwed or bolted to duct flanges. Use suitable gaskets to
ensure weather- -tight and airtight seal.
4. All units must have field- -supplied filters or accessory filter
rack installed in the return- -air side of the unit.
Recommended sizes for filters are shown in Table 1.
5. Size all ductwork for maximum required airflow (either
heating or cooling) for unit being installed. Avoid abrupt
duct size increases or decreases or performance may be
affected.
6. Adequately insulate and weatherproof all ductwork located
outdoors. Insulate ducts passing through unconditioned
space, and use vapor barrier in accordance with latest issue
of Sheet Metal and Air Conditioning Contractors National
Association (SMACNA) and Air Conditioning Contractors
of America (ACCA) minimum installation standards for
heating and air conditioning systems. Secure all ducts to
building structure.
7. Flash, weatherproof, and vibration- -isolate all openings in
building structure in accordance with local codes and good
building practices.
Horizontal Duct Covers
Basepan
Downflow
(Vertical)
Supply
Knockout
Fig. 9 - - Supply and Return Duct Opening
3
2
INSTRUCTIONS FOR REMOVING DOWNSHOT PANELS
1. Score groove in corner 1 in both directions as far as you can reach.
2. Starting in corner 1, tap-out all sides with a small hammer. Be careful
not to damage any other part of unit.
3. If side from corner 3 to 4 is not accessible due to heat exchanger,
pivot panel up and down by hand until remaining side breaks off.
Fig. 10 - - Vertical (Downflow) Discharge Knockouts
Step 8 — Install Electrical Connections
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground may
consist of an electrical wire connected to the unit ground
screw in the control compartment, or conduit approved for
electrical ground when installed in accordance with NFPA
70 (NEC) (latest edition) (in Canada, Canadian Electrical
Code CSA C22.1) and local electrical codes.
!
A09061
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the
unit being installed.
1. Make all electrical connections in accordance with
NFPA 70 (NEC) (latest edition) and local electrical codes
Basepan
Downflow
governing such wiring. In Canada, all electrical
(Vertical)
connections must be in accordance with CSA standard
Return
Knockout C22.1 Canadian Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.
2. Use only copper conductor for connections between
field- -supplied electrical disconnect switch and unit. DO
A09088
NOT USE ALUMINUM WIRE.
3. Be sure that high- -voltage power to unit is within
operating voltage range indicated on unit rating plate. On
3- -phase units, ensure phases are balanced within 2
percent. Consult local power company for correction of
improper voltage and/or phase imbalance.
4. Do not damage internal components when drilling
through any panel to mount electrical hardware, conduit,
etc.
8
4
3
4
2
1
WARNING
CAUTION
1
A09054