Bryant 551A Heat Anticipator Settings, VIII. Install OUTDOOR-AIR Hood, Unit Stage, 155-240

Table 4 — Heat Anticipator Settings

UNIT	UNIT	kW*	STAGE 1	STAGE 2
551A	VOLTAGES
		14/19	.40	—
	208/230-3-60	26/34	.40	.66
		42/56	.66	.40
155-240		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, or 480 v.

Fig. 16 — EconoMi$er Control Module

Adjustment Potentiometers

CONTROL MODULE ACTUATOR

Fig. 17 — EconoMi$er Control Module Location

VIII. 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 EconoMi$er.

NOTE: The hood top panel, upper and lower filter retainers, hood drain pan, baffle (180-240), 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. 18).

1.Attach seal strip to upper filter retainer. See Fig. 19.

2.Assemble hood top panel and side panels, upper filter retainer, and hood drain pan (Fig. 20).

3.Secure lower filter retainer and long section of filter support bracket to unit. See Fig. 20. Leave screws loose on size 180 and 240 units.

4.Slide baffle (size 180 and 240 units) behind lower fil- ter retainer and tighten screws.

5.Loosen sheet metal screws for base unit top panel located above outdoor-air inlet opening, and remove screws for hood side panels located on the sides of the outdoor-air inlet opening.

6.Match notches in hood top panel to unit top panel screws. Insert hood flange between unit top panel flange and unit. Tighten screws.

7.Hold hood side panel flanges flat against unit, and install screws removed in Step 5.

8.Insert outdoor-air inlet screens and spacer in channel created by lower filter retainer and filter support bracket.

9.Attach remaining short section of filter support bracket.

A.Outdoor Air Enthalpy Sensor Installation

Perform the following procedure to install the outdoor air enthalpy sensor (part no. CROUTENT001A00).

1.Remove the outdoor air temperature sensor cover. See Fig. 21. Save cover and screws.

2.Disconnect the wiring from the installed outdoor air temperature sensor. See Fig. 22.

3.Use a 1/4-in. nut driver to remove the 2 screws secur- ing the outdoor air temperature sensor to the sheet metal.

4.Mount the outdoor air enthalpy sensor in the outdoor air temperature sensor location using the screws removed in Step 3.

5.Connect the outdoor air enthalpy sensor wiring har- ness to the EconoMi$er control module and sensor.

6.Re-install sensor cover saved from Step 1.

B. Return Air Temperature Sensor or Return Air Enthalpy Sensor Installation

Perform the following procedure to install the return air temperature sensor (part no. CRRETTMP001A00) or return air enthalpy sensor (part no. CRRETENT001A00).

1.Attach the sensor to the mounting bracket using 2 self-tapping 1/2-in. screws provided.

2.Mount the bracket to the inside of the return air opening flange using a 1/4-in. nut driver and 2 no. 6 sheet metal screws.

NOTE: The sensor must be mounted in an upright position.

3.Feed the sensor wiring through the bushing in EconoMi$er to secure wires.

4.Route sensor wiring harness from sensor to EconoMi$er control module. Secure wiring harness to the original harness using tie wraps.

5.Wire the sensor to the EconoMi$er control module. See Fig. 23 and 24.

Fig. 18 — Outdoor-Air Hood Component Location

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