Carrier Understanding TXV Sensing Bulb Location and Installation Details for Air Conditioners

LEGEND

TXV — Thermostatic Expansion Valve

NOTE: The 8 o’clock position is shown above.

Fig. 9 — TXV Sensing Bulb Location

DISCONNECT

PER NEC

ELECTRIC

HEATER

ACCESSORY

24 V CONTROL WIRE

UNIT	QUANTITY REQUIRED	FIGURE REFERENCE
38ARQ008,012	1	B
38AQS016	2	A
38ARQ012 (2)	2	A
38ARQ012,	2	A
AQS016

LEGEND

TXV — Thermostatic Expansion Valve

Fig. 11 — Filter Drier Quantity and Location

FUSED

DISCONNECT

SWITCH*

40RMQ024

UNITRETURN AIR

SUBBASE

ACCESSORY

15 DIAMS MIN

LEGEND

BULB CAPILLARY

TUBES

8 DIAMS MIN

	SIGHT
	GLASS*
	FILTER
	DRIER*
10 DIAMS
MIN
CONDENSATE	FUSED
	DISCONNECT
DRAIN
	SWITCH*

CONDENSING

UNIT B

INSULATED

VAPOR LINE

LIQUID LINE

CONDENSING

NEC — National Electrical Code

TXV — Thermostatic Expansion Valve

Piping

*Field supplied.

NOTES:

1.All piping must follow standard refrigerant piping techniques. Refer to Carrier System Design Manual for details.

2.All wiring must comply with the applicable local and national codes.

3.Wiring and piping shown are general points-of-connection guides only and are not intended for, or to include all details for, a specific installation.

4.Filter driers must be bi-flow type suited for heat pump duty.

5.Condensing unit A should be the first on and last off and be connected to the lower half of the coil.

6.Internal factory-supplied TXVs not shown.

INSULATED

VAPOR LINE

LIQUID

LINE

UNIT A

Fig. 10 — Typical Installation — 40RMQ024,028

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