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VII. STEP 7 — MAKE OUTDOOR-AIR INLET ADJUSTMENTS
A. Manual Outdoor-Air Damper
All units (except those equipped with a factory-installed econo-
mizer) have a manual outdoor-air damper to provide venti-
lation 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).
B. 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 opera-
tion) 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
559F
UNIT
VOLTAGES
kW* STAGE 1 STAGE 2
180-300
208/230-3-60
26/34 .40 .66
42/56 .66 .40
56/75 .66 .66
460-3-60
32 .40 .40
55 .40 .66
80 .66 .66
*Heater kW is based on heater voltage of 208 v, 240 v and 480 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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