Bryant 524J manual Start-Up, Service, Label, TXV Bulb Location, Adjusting TXV for Superheat

START-UP

Before starting unit, check the following and correct as necessary:

S Is unit solidly supported?

S Is fan adjusted for speed and pulley alignment?

S Are pulleys, motor, and bearings securely mounted? S Are there any loose parts that will rattle or vibrate? S Is condensate drain pan pitched for correct drainage?

S Are coil baffle plates tight against coil to prevent air bypass?

S Are all panels securely fastened?

S Are all electrical connections correct and tight? S Is TXV bulb located on suction tube per Fig. 20?

S Is the capillary tube to the bulb free of kinks and not subject to pinching?

S Is the bulb well secured to the suction tube with strap?

Also refer to condensing unit or outdoor heat pump section instructions before starting a split system. A split system start-up checklist is provided at the end of these instructions.

40RU500072 2.0

IMPORTANT! / IMPORTANT

	TXV		EQUALIZER LINE
			CONDUITE D'ÉQUILIBRAGE
UPPER SPLIT	SENSING		SIGHT GLASS
	BULB
BLOC SUPÉRIEUR
	CAPTEUR TXV		HUBLOT
AIR FLOW			TXV
CIRCULATION
D'AIR	15 DIAMS MIN	10 DIAMS
	15 x DIA. MIN	10 x DIA. MIN	SOLENOID
		8 DIAMS MIN	VALVE
		8 x DIA. MIN	VANNE
LOWER			SOLÉNOÏDE
			FILTER
SPLIT
			DRIER
BLOC	TXV SENSING
INFÉRIEUR			FILTRE
	BULB		DESSICCATEUR
	CAPTEUR TXV
AIR FLOW			TXV
CIRCULATION
D'AIR	15 DIAMS MIN	10 DIAMS	EQUALIZER LINE
	15 x DIA. MIN	10 x DIA. MIN	CONDUITE D'ÉQUILIBRAGE
		8 DIAMS MIN	INDOOR COIL
		8 x DIA. MIN
			ÉCHANGEUR INTÉRIEUR

The sensor bulb capillary tubes must be routed from the TXVs inside the unit through one of the piping access holes. Clamp the TXV sensor bulb on a vertical portion of the suction line, outside the unit. See Fig. 7 in the installation, start-up and service instruction. Super heat must be adjusted in field.

Les tubes capillaires du capteur doivent être acheminé à partir du détendeur thermostatique situé à l'intérieur de l'appareil au travers de l'un des trous d'accès de conduites. Attacher le capteur sur une portion verticale de la conduite de succion, à l'extérieur de l'appareil. Voir la Figure 7 dans le manuel d'installation, de mise en marche, et d'entretien. La surchauffe doit être ajustée sur place.

C10827

Fig. 20 - Label, TXV Bulb Location

Adjusting TXV for Superheat —

The unit-mounted thermostatic expansion valve(s) is/are factory set to provided superheat at the bulb location in 10_F to 15_F (5.5_C to 8.3_C) range. Actual system load conditions may require adjustment of the factory setting. To adjust the TXV superheat setting:

1.Remove the seal cap from the bottom of the TXV body.

2.To increase superheat, turn the stem clockwise. To de- crease the superheat, turn the stem counterclockwise. Do not turn the stem more than one full turn.

3.Wait until suction pressure and superheat stabilize. This may take more than 30 minutes.

4.Continue adjustment until superheat reaches 10_F to 15_F (5.5_C to 8.3_C).

5.Replace the seal cap; tighten.

INSTALLER / INSTALLATEUR

TXV superheat must be checked at initial unit start-up and adjusted if necessary. Superheat must be 10 - 15 deg F.

La surchauffe TXV doit être vérifiée au moment de la mise en route initiale et ajustée si nécessaire. La surchauffe doit être comprise entre 10 et 15 degrés F.

40RU500073 2.0

C10828

Fig. 21 - Label, TXV Adjustment

SERVICE

Inspection and maintenance should be performed at regular intervals and should include the following:

S Complete cleaning of cabinet, fan wheel, cooling coil, condensate pan and drain, heating coils, and return-air grille (if present).

S Inspection of panels and sealing of unit against air leakage.

S Adjustment of fan motor, belt, bearings, and wheels. S Cleaning or replacement of filters.

S Testing for cooling/heating system leaks. S Checking of all electrical connections.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lockout tag. Unit may have more than one power switch.

Most unit service can be performed by removing one or both of the unit’s side panels. Coil cleaning or removal or insulation cleaning may require removal of a rear, top, or bottom panel, depending on the unit’s orientation. When service is completed, replace unit panels.

Panels - Panels are fastened to unit frame with sheet metal screws. Fan and coil compartment must be sealed tightly after service to prevent air from bypassing the cooling coil.

524J

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