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All units must have an external trap for condensate drainage.
Install a trap at least 4 in. (102 mm) deep and protect against
freeze-up. If drain line is installed downstream from the exter-
nal trap, pitch the line away from the unit at 1 in. per 10 ft
(25 mm in 3 m) of run. Do not use a pipe size smaller than the
unit connection (3/4 in.).
Step 11 — Make Electrical Connections
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
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 electrical wire connected to unit ground lug in
control compartment, or conduit approved for electrical
ground when installed in accordance with NEC; ANSI/
NFPA 70, latest edition (in Canada, Canadian Electrical
Code CSA [Canadian Standards Association] C22.1), and
local electrical codes.
NOTE: Check all factory and field electrical connections for tight-
ness. Field-supplied wiring shall conform with the limitations of
minimum 63°F (33°C) rise.
FIELD POWER SUPPLY
If equipped with optional powered convenience outlet: the
power source leads to the convenience outlet's transformer pri-
mary are not factory connected. Installer must connect these
leads according to required operation of the convenience out-
let. If an always-energized convenience outlet operation is de-
sired, connect the source leads to the line side of the unit-
mounted disconnect. (Check with local codes to ensure this
method is acceptable in your area.) If a de-energize via unit
disconnect switch operation of the convenience outlet is de-
sired, connect the source leads to the load side of the unit dis-
connect. On a unit without a unit-mounted disconnect, connect
the source leads to compressor contactor C pressure lugs with
unit field power leads.
Refer to Fig. 17 for power transformer connections and the
discussion on connecting the convenience outlet on page 14.
Field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C (see wiring diagram
label for control box component arrangement) or at factory-
installed option non-fused disconnect switch. Maximum wire
size is No. 2 AWG (copper only, see Fig. 18.)
NOTE: TEST LEADS — Unit may be equipped with short leads
(pigtails) on the field line connection points on contactor C or op-
tional disconnect switch. These leads are for factory run-test pur-
poses only; remove and discard before connecting field power
wires to unit connection points. Make field power connections
directly to line connection pressure lugs only.
Units Without Non-Fused Disconnect Option
TB
11
12
Disconnect
per
NEC
208/230-1-60
Units With Non-Fused Disconnect Option
2
L1
4
L2
6
L3
Disconnect factory test leads; discard.
Fig. 17 — Power Wiring Connections
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not connect aluminum wire between disconnect switch
and unit. Use only copper wire.
Electric
Disconnect
Switch
Fig. 18 — Disconnect Switch and Unit
13
TB
11
12
13
Disconnect
per
NEC
L1
L2
L3
208/230-3-60
460-3-60
1
Optional
Factory
3
Disconnect
Wiring
Switch
5
WARNING
Copper
Wire Only
Aluminum
Wire
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