Bryant 581B036--072, 581C024--060 Cleaning, Evaporator Coil, Condenser Coil, One-Row Coils

Table 37—Perfect Humidity Adaptive Dehumidification System Sequence of Operation and

System Response — Single Compressor Unit (581C 024-060, 581B 036-072)

THERMOSTAT INPUT			ECONOMIZER FUNCTION			581B,C UNIT OPERATION
H	Y1	Y2	OAT. < Economizer Set Point	Economizer	Comp. 1	Subcooling Mode	Hot Gas Reheat Mode
Off	—	—		Normal Operation
On	On	On	No	Off	On	Yes	No
On	On	Off	No	Off	On	Yes	No
On	On	On	Yes	On	On	Yes	No
On	On	Off	Yes	On	On	No	Yes
On	Off	Off	No	Off	On	No	Yes

NOTE: On a thermostat call for W1, all cooling and dehumidification will be off.

LEGEND

OAT --- Outdoor Air Temperature

The net effect of the rooftop when in hot gas reheat mode is to provide nearly all latent capacity removal from the space when sensible loads diminish (when outdoor temperature conditions are moderate). When in hot gas reheat mode, the unit will operate to provide mostly latent capacity and extremely low sensible heat ratio capability.

Similar to the subcooling mode of operation, hot gas reheat mode operates only when the outside air temperature is warmer than 40_F. Below this temperature, a factory installed outside air temperature switch will lockout this mode of operation.

SERVICE

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

When sevicing unit, shut off all electrical power to unit and install lockout tag.

Step 1 —Cleaning

Inspect unit interior at the beginning of heating and cooling season and as operating conditions require.

Evaporator Coil

1.Turn unit power off, tag disconnect. Remove evaporator coil access panel.

2.If economizer or two-position damper is installed, remove economizer by disconnecting Molex plug and removing mounting screws.

3.Slide filters out of unit.

4.Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash both sides of coil and flush with clean water. For best results, back-flush toward return-air section to remove foreign material. Flush condensate pan after completion.

5.Reinstall economizer and filters.

6.Reconnect wiring.

7.Replace access panels.

Condenser Coil

Inspect coil monthly. Clean condenser coil annually, and as required by location and outdoor air conditions.

One-Row Coils

Wash coil with commercial coil cleaner. It is not necessary to remove top panel.

2-Row Coils

Clean coil as follows:

1.Turn off unit power, tag disconnect.

2.Remove top panel screws on condenser end of unit.

3.Remove condenser coil corner post. (See Fig. 47.) To hold top panel open, place coil corner post between top panel and center post. (See Fig. 48.)

C06044

Fig. 47 ---Cleaning Condenser Coil

C06045

Fig. 48 ---Propping Up Top Panel

581B,C

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