Power and Connecting Cables Field Supplied

40QAC/38HDR -- 40QAQ/38QRR

Refrigerant Charge

The 38HDR and 38QRR units can be matched with multiple outdoor units and thus additional charge might be required when matched with the 40QAC or 40QAQ units.

Table 5 – Additional Charge

	Additional Charge lb. (kg.)
Unit Size	38HDR	38QRR
018	0.7 (0.32)	0.7 (0.32)
024	1.3 (0.59)	0.8 (0.36)
030	1.4 (0.64)	0
036	0.2 (0.1)	0.5 (0.23)
048	0.2 (0.1)	0
060	0.5 (0.23)	0

Note:The above additional charge is required amount for line lengths up to 25 ft (7.6 m). For line lengths exceeding 25 ft (7.6 m), additional charge will be required. Refer to the Duct Free Splits Long Line Guide.

Metering Device

The 40QAC and 40QAQ units use an accurator or a TXV as shown in Table 6.

Table 6 – Accurator Sizes

Unit Size	Cooling Only	Heat Pumps
Unit Size	40QAC	40QAQ	38QRR
	40QAC	40QAQ	38QRR
018	TVX	49	40
024	TVX	55	43
030	TVX	65	55
036	TVX	70	63
048	TVX	80	73
060	TVX	TXV	80

NOTE: Pistons are supplied with either the indoor or outdoor units.

Power and Connecting Cables - Field Supplied

Power:

SThe main power is supplied to both the indoor and outdoor

units.

SConsult local building codes, NEC (National Electric Code) or CEC (Canadian Electric Code) for any special requirements.

SUse Table 7 for the electrical requirements for the outdoor units and Table 8 for the indoor units to correctly size the cables and disconnect switches.

Control Wiring

Thermostat wires should be used for control wiring between the indoor and outdoor units. A two conductor cable is required for the cooling only units and a seven conductor cable is required on heat pumps. 18 AWG is recommended for any length up to 200 ft (61.0 m).

User Interface - Finished Goods Accessory

Any of the following three thermostats can be used depending on the type of system on hand and the desired features. Refer to Table 9 to select the proper thermostat.

Table 7 – 38HDR / QRR Electrical Requirements

			38HDR			38QRR
UNIT SIZE	V---PH ---Hz	MIN CKT AMPS		FUSE/HACR BKR	MIN CKT AMPS	FUSE/HACR BKR AMPS
		MIN CKT AMPS		AMPS	MIN CKT AMPS	FUSE/HACR BKR AMPS
				AMPS

018	208/230---1---60	12.1		20	12.1	20

024	208/230---1---60	17.7		25	18.8	30

030	208/230---1---60	19.1		30	17.5	30

	208/230---1---60	19.1		30	20.9	30
036
036	208/230---3---60	13.0		20	14.1	20
	460---3---60	7.9		15	7.9	15

	208/230---1---60	26.4		40	34.6	50
048
048	208/230---3---60	17.9		25	22.4	30

	460---3---60	8.4		15	10.0	15

	208/230---1---60	34.5		60	34.5	60
060
060	208/230---3---60	21.5		30	23.6	40

	460---3---60	10.6		15	10.6	15

Table 8 – 40QAC / QAQ Electrical Requirements

UNIT	VOLTAGE		40QAC			40QAQ
UNIT	V---Ph---60 Hz	MCA		MOCP	MCA		MOCP
	V---Ph---60 Hz	MCA		MOCP	MCA		MOCP

024	208/230---1	0.63		15.0	9.29		15.0

036	208/230---1	1.60		15.0	17.70		20.0

048	208/230---1	2.00		15.0	23.80		25.0

060	208/230---1	3.30		15.0	28.70		30.0

Table 9 – Thermostat Selection

			System Type
	Model Number	Cooling Only & HP	Cooling Only	Cooling Only
		53DFS250---SL	53DFS250---FS	53DFST2---NP
Features	7 Day Programmable	√	√	---
Features	5+1+1 Day Programmable	---	---	√
	5+1+1 Day Programmable	---	---	√
	Remote Room Sensor	√	√
	Dry Contact Equipped	√	√	---

40QAC specifications

The Carrier 40QAC is a standout product in the realm of commercial air conditioning systems. This air-cooled chiller is designed to meet a variety of cooling needs while ensuring energy efficiency and reliability. One of the most notable features of the 40QAC is its advanced scroll compressor technology, which is engineered to provide consistent performance with reduced noise levels. This makes it an ideal choice for applications where minimizing sound pollution is crucial, such as in urban settings or near sensitive environments.

In terms of energy efficiency, the 40QAC boasts impressive ratings, with a high coefficient of performance (COP) that helps to lower operational costs and reduce environmental impact. Its design integrates various energy-saving features, including variable speed fans and a robust control system that optimizes performance based on real-time demand. This adaptability allows the chiller to maintain comfort levels while consuming less energy than traditional models.

The 40QAC is equipped with a microprocessor-based control system that simplifies operation and enhances user experience. This intelligent control interface allows operators to monitor performance metrics, adjust settings, and troubleshoot any issues remotely, increasing overall system reliability. The system is also designed to be compatible with building management systems, which facilitates seamless integration into existing infrastructure.

Another prominent characteristic of the Carrier 40QAC is its robust construction. Built with high-quality materials, it offers excellent durability and longevity, even in challenging environmental conditions. The unit also incorporates features to streamline maintenance, such as accessible component layout and easy-to-remove panels, ensuring that downtime for servicing is minimized.

Safety is another critical aspect of the Carrier 40QAC’s design. It’s engineered with numerous safety protocols to protect against overheating, overpressure, and other potential hazards, guaranteeing both system integrity and peace of mind for operators.

Overall, the Carrier 40QAC is a versatile and efficient solution for commercial cooling needs. With its technological advancements, energy-saving features, and robust design, it stands out as a reliable choice for businesses looking to balance performance with sustainability. The 40QAC not only promises efficient cooling but does so while aligning with the growing demand for eco-friendly solutions in today's marketplace.