Carrier 50TJ024 - Step 7 - Make Outdoor-Air Inlet; Adjustments; Manual Outdoor-Air Damper; Optional Economizer

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. 13).
OPTIONAL ECONOMIZER
Economizer Motor Control Module (Fig. 14-16) — Set to
the ‘‘D’’ setting (Fig. 15). The control module is located on
the economizer motor. See Fig. 14 and 16.
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 3 — Heat Anticipator Settings
UNIT
50TJ
UNIT
VOLTAGES
kW* STAGE 1 STAGE 2
016-028
208/230-3-60
26/34 .40 .66
42/56 .66 .40
56/75 .66 .66
380-3-60
20 .40 .40
35 .40 .66
460-3-60
32 .40 .40
55 .40 .66
80 .66 .66
575-3-60 50 .66 .66
*Heater kW is based on heater voltage of 208 v, 240 v, 380 v, 480 v,
and 575 v.
Fig. 13 — 25% Outdoor-air Section Details
Fig. 14 — Economizer Damper Assembly
— End View
LEGEND
LED — Light-Emitting Diode
Fig. 15 — Economizer Control Module
(Part Number W7459A)
Fig. 16 — Economizer Control Module Location
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