Carrier 50HJ015 - Step 7 - Make Outdoor-Air Inlet; Adjustments; Manual Outdoor-Air Damper; Optional Factory-Installed

Table 2 — Electrical Data
UNIT
50HJ
V-PH-HZ
VOLTAGE
RANGE
COMPRESSOR
CONDENSER
FAN MOTOR
EVAPORATOR
FAN MOTOR
ACCESSORY/OPTIONAL
ELECTRIC HEATERS*
POWER SUPPLY
No. 1 No. 2
Min Max RLA LRA RLA
LRA Qty FLA Hp
FLA
FLA
kW MCA
MOCPf
015
208/230-3-60
187 253 49 3 191
- -
2 77 3 105
39/ 45
72/ 82
117/135
14/19
26/34
42/56
88/ 88
88/ 88
103/116
159/148
100/100
100/100
110/125
175/175
460-3-60 414 508 22 1 86
- -
2 33 3
48
18
39
66
15
32
55
39
39
55
72
45
45
60
80
575-3-60
518
632
179 69
-
-
2 26 3
39
37
37
32
52
35
60
024
208/230-3-60 187
253 43 9 170
43 9
170
2
54
(ea)
7%
24 2/22 0
72/ 82
117/135
156/180“
26/34
42/56
56/75“
134/132
134/132
177/163
186/208“
175/175
175/175
200/175
200/225“
460-3-60
414 508 199
77 19 9 77
2
27
(ea)
7 Vs 11 0
39
66
96“
32
55
80“
62
62
80
110“
80
80
90
110“
575-3-60 518
632
159
62 159 62 2
34
(ea)
7 Vs 9 0
- -
52 60
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
RLA — Rated Load Amps
‘Heater capacity' (kW) is based on heater voltage of 208 v, 240 v, 480 v and
575 v. If power distribution voltage to unit varies from rated heater voltage,
heater kW will vary accordingly This is the maximum size permissible; smaller
fuse size may be used where conditions permit
tFuse or HACR circuit breaker
“Heaters are field installed only
NOTES:
1. 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 The Canadian units may
be fuse or circuit breaker
2 MCA calculation for units with electric heaters over 50 kW
= (1.25 x IFM amps) + (1 00 x heater FLA).
Table 3 - Heat Anticipator Settings
UNIT
VOLTAGES
kW
STAGE 1
STAGE 2
14/17
40
—
208/230
26/31
40
40
50HJ
42/52 66 40
15 40
—
Ol 5
460
30
40 40
51 40 66
575
37 40 .66
26/31 40
66
208/230,575-3-60 42/52 .66
40
50HJ
56/69
66
66
024
30
40
40
460-3-60
51 40 66
_73_j
66
66
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 econo¬
mizer motor since damage to motor will result.
NOTE: Refer to accessory installation instructions in¬
cluded with the field-installed economizer for installation
information. Also see Accessory Field-Installed Econo¬
mizer Adjustment section on page 10.
Step 8 — Install Outdoor-Air Hood — The same
type of factory-installed hood is used on units with 25% air
ventilation and units with an economizer.
NOTE: The hood top panel, upper and lower filter retain¬
ers, hood drain pan, baffle (024 only), and filter support
bracket are secured opposite the condenser end of the unit.
The screens, hood side panels, remaining section of filter
support bracket, seal strip, and all other hardware are in a
package located inside the return-air filter access panel
(Fig. 16)
1. Attach seal strip to upper filter retainer. See Fig. 17.
2. Assemble hood top panel and side panels, upper filter
retainer, and hood drain pan (Fig. 18)
3. Secure lower filter retainer and long piece of filter sup¬
port bracket to unit. See Fig. 18. Leave screws on 024
units loose
4. 50HJ024 Units Only: Slide baffle behind lower filter re¬
tainer and tighten screws.
5. Loosen sheet metal screws for base unit top panel lo¬
cated above outdoor-air inlet opening.
25% ADJUSTABLE
AIR DAMPER
BASE
UNIT
Fig. 12 — 25% Outdoor-Air Section Details