Payne PA1R Series Installation, Start-Up And Service Instructions Manual page 13

7. Remove tape from outdoor-air thermostat (OAT). Fas-
ten OAT to inside of hood using screws and speed clips
provided. See Fig. 22. Make sure OAT terminals are
positioned up.
8. Replace outdoor-air opening panel using screws from
Step 2. Replace filter access panel. Ensure the filter
access panel slides along the tracks and is securely
engaged.
9. Fasten hood top and side plate assembly (Fig. 17) to
outdoor-air opening panel with screws provided.
10. Place knob supplied with economizer on OAT. See
Fig. 22. Set for 3° F below indoor room thermostat set-
ting. If accessory enthalpy control (EC) is used in place
of OAT, see instructions shipped with EC for installa-
tion and adjustment. See Fig. 22.
11. Connect OAT per Fig. 23.
12. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen
retainer to hood using screws provided.
NOTE: Refer to Fig. 24 for economizer barometric relief damper
characteristics.
Fig. 17 — Outdoor-Air Hood Details
ECONOMIZER
CONTROL
BOARD
BAROMETRIC
RELIEF
DAMPER
ECONOMIZER
PLUG
ECONOMIZER
MOTOR
Fig. 18 — Horizontal Durablade Economizer
Fig. 19 — Horizontal Discharge Block-Off
—13—
Installation
BLOCK-OFF PLATE
Plate