Field Control Wiring Step 7 - Make Outdoor-Air Inlet Adjustments; Optional Factory-Installed Economizer - Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual

VOLTAGE
RANGE
UNIT
VOLTAGE
50HJQ
Min Max RLA LRA RLA LRA Qty FLA
014 400-3-50 342 440
016 400-3-50 342 440
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code (U.S.A. Standard)
RLA — Rated Load Amps
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to the installation
instructions included with the accessory. Refer to unit Price
Pages or contact your local representative for more infor-
mation. Locate thermostat assembly on a solid wall in the
conditioned space to sense average temperature.
Route thermostat cable or equivalent single leads of
2
1.0 mm (no. 18 AWG [American Wire Gage]) colored wire
from subbase terminals through conduit in unit to low-
voltage connections as shown on unit label wiring diagram
and in Fig. 11.
NOTE: For wire runs up to 15 m (50 ft), use 1.0 mm
(no. 18 AWG) insulated wire (35 C minimum). For 15 m to
22 m (50 to 75 ft), use 1.5 mm
(35 C minimum). For over 22 m (75 ft), use 2.5 mm
14 AWG) insulated wire (35 C minimum). All wire larger
2
than 1.0 mm (no. 18 AWG) cannot be directly connected to
the thermostat and will require a junction box and splice at
the thermostat. See Table 3 for American/European wire
conversions.
Set heat anticipator settings as indicated in Table 4. Set-
tings may be changed slightly to provide a greater degree of
comfort for a particular installation.
Refer to accessory remote control instructions as
required.
Step 7 — Make Outdoor-Air Inlet Adjustments
MANUAL OUTDOOR-AIR DAMPER — All units (except
those equipped with a factory-installed economizer) have a
manual outdoor-air damper to provide ventilation air. Damper
can be preset to admit up to 25% outdoor air into return-air
compartment. To adjust, loosen securing screws and move
damper to desired setting. Then retighten screws to secure
damper (Fig. 12).

OPTIONAL FACTORY-INSTALLED ECONOMIZER

Economizer Motor Control Module (Fig. 13-15) — Set to
the ''D'' setting (Fig. 14). The control module is located on
the economizer motor. See Fig. 13 and 15.
Damper Vent Position Setting
1. Set fan switch at ON position (continuous fan operation),
and close night switch if used.
2. Set system selector switch to OFF position.
3. Turn adjustment screw slowly until dampers assume de-
sired vent position. Do not manually operate economizer
motor since damage to motor will result.
Table 2 — Electrical Data
OUTDOOR
COMPRESSOR
FAN
No. 1 No. 2
MOTOR
(ea)
19.9 114 — — 3 0.8
14.1 80 14.1 80 3 0.8
2
(no. 16 AWG) insulated wire
2
INDOOR FAN POWER
MOTOR EXHAUST
LRA Hp FLA LRA FLA LRA
— —
10.8 3.7 4.8 42.3
2.3 6
— —
10.8 5 7.9 46
2.3 6
*Fuse or HACR circuit breaker. This is the maximum size permissible; smaller
fuse size may be used where conditions permit.
NOTE: In compliance with NEC requirements for multimotor and combination
load equipment (refer to NEC Articles 430 and 440), the overcurrent protective
device for the unit shall be fuse or HACR breaker.
NOTE: Refer to accessory installation instructions included
with the field-installed economizer for installation informa-
tion. Also see Economizer Adjustment section on page 19.
Table 3 — American/European Wire Conversions
Industry
Standard
Size
18 AWG
16 AWG
14 AWG
2
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
(no.
3 AWG
2 AWG
1 AWG
1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG
250 kcmil
300 kcmil
350 kcmil
400 kcmil
500 kcmil
600 kcmil
LEGEND
AWG — American Wire Gage
kcmil — Thousand Circular Mils
Table 4 — Heat Anticipator Settings
UNIT
VOLTAGE
400
Fig. 11 — Field Control Thermostat Wiring
8
OPTIONAL POWER SUPPLY DISCONNECT
ELECTRIC HEAT
FLA kW MCA MOCP*
— — 32 50
34 23 75 80
57 40 103 110
— — 34 50
34 23 77 80
57 40 106 110
— — 42 50
34 23 85 90
57 40 113 125
— — 44 50
34 23 87 90
57 40 116 125
AMERICAN
American
Conversion Size
2
(mm )
0.82
1.30
2.08
3.30
5.25
6.36
13.29
21.14
26.65
33.61
42.39
53.49
67.42
85.00
107.19
126.64
151.97
177.90
202.63
253.29
303.95
HEATER
STAGE 1
kW
23 .40
40 .40
LOW-VOLTAGE CONNECTIONS
SIZING
RLA LRA
31.2 189
44.6 189
71.1 189
33.8 195
47.3 195
73.7 195
44 238
48 238
75 238
47 238
51 238
77 238
EUROPEAN
Industry
Standard
2
Size (mm )
1.0
1.5
2.5
4.0
6.0
10.0
16.0
25.0
—
35.0
50.0
—
70.0
95.0
120.0
150.0
—
185.0
240.0
300.0
—
STAGE 2
.40
.66