Carrier 50EQ - Manual (Page 3)

Outdoor Air Inlet Screens — Be sure all outdoor
air inlet screens are in place before operating unit.
Condensate Drains — See Fig. 3 for drain loca­
tions. Condensate drain is open to atmosphere and
must be trapped. Install a trapped drain line at con­
nection to be used. Trap must be at least 4 in. deep
and made of flexible material or be installed so as
to prevent freeze-up.
Condensate drain pan is fitted with a 1-in. FPT
coupling. Condensate drain line may be routed thru
unit base pan or unit side as shown. A grommet is
shipped taped to this drain. Install this gasket in unit
base pan opening or alternate opening on end of unit
as required.
Field Power Wiring — All units have circuit
breakers for compressors, heaters, fan motors and
control circuits. Each unit is factory wired for
voltage shown on nameplate. The main power ter­
minal block is suitable for use with aluminum or
copper wire. See Table 2 for use of aluminum wire
on electric heater terminal blocks.
Install conduit connections in unit base pan or
side panel opening provided as shown in Fig. 3.
On all units route power lines to terminal block in
control box as shown in Fig. 8. On units with electric
heat, route second power supply line thru connector
to terminal block in heater compartment.
Locate field-supplied disconnect(s) within sight of
and directly accessible from the unit. All field wiring
must comply with NEC and local requirements.
Affix crankcase heater sticker to unit disconnect
switch.
Voltage to compressor terminals during com­
pressor operation must be within voltage range indi­
cated on unit nameplate. Phases must be balanced
within 2%. Contact local power company for
correction of improper voltage or phase imbalance.
See Table 2 as required.
Failure due to operation of unit on improper line
voltage or with excessive phase imbalance con­
stitutes abuse and may cause damage to unit
electrical components.
Field Control Wiring — Install a Carrier approved
accessory thermostat assembly according to in­
stallation instructions included with the accessory.
Locate thermostat assembly in the conditioned
space where it will sense average temperature.
DIMENSIONS (ft-in.)
UNIT
ROOF CURB
MODEL NO.
A B C D E F
50EQ024 50EQ900001 10- Cfl/4 4-11 — 0-6-1/4 0-5-1/8
50EQ028 50EQ900011 12-10-3/4 6-11 — — 0-6-1/4Ì0-5-1/8
50EQ034 50EQ900021 16- 3-1/8 9- 0 4-4 0-6 0-6-1/4 0-5-7/8
NOTES
1 Certified dimension drawings are available on
req uest
2. For details of 12-in high roof curb, refer to 48DD
roof curb installation instructions
3. Two field power supplies are required for 50EQ
units with electric heat
Fig. 2 — Roof Curb Dimensions
3