Wiring Main Power, Transformer Taps, Thermostats

WIRING – MAIN POWER

Refer to the unit rating plate for wire sizing information and maximum fuse size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. If field installed heaters are added to the basic unit, a second separate power supply circuit will be required. The heater rating plate located adjacent to the basic unit rating plate will show the appropriate circuit ampacity fuse size, etc. (Also see “Electrical Data” on pages 2 and 3.) All models are suitable for connection with copper wire only. These instructions must be adhered to. Refer to the National Electrical Code for complete current carrying capacity data on the various insulation grades of wiring material.

The electrical specifications on page 2 and 3 lists fuse and wire sizes (75°F copper) for all models including the most commonly used heater sizes.

The unit rating plate lists a “Maximum Time Delay Fuse” or “HACR” type circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor.

TABLE 7

THERMOSTAT WIRE SIZE

			Maximum
			Distance
Transformer VA	FLA	Wire Gauge	In Feet

		20	45
		18	60
55	2.3	16	100
		14	160
		12	250

TRANSFORMER TAPS

230/208V, 1 phase and 3 phase equipment employ dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are:

TAP	RANGE
240	253 – 216
208	220 – 187

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).

WIRING – 24V LOW VOLTAGE CONTROL

CIRCUIT

Five (5) wires should be run from thermostat subbase to the 24V terminal board in the unit. A five conductor, 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in Figure 8.

THERMOSTATS

See specific wiring information for the different models, heater KWs, and voltages on pages 14 through 17.

TABLE 8

WALL THERMOSTAT AND SUBBASE COMBINATIONS


Thermostat	Subbase		Predominate Features
8403-002	8404-003	1 stage heat,		1 stage cool,		Mercury
T87F3111	Q539A1220	System:	Heat-off-cool		Fan:		on-auto
8403-041	——	1 stage heat,		1 stage cool,		Mercury
T8034C1499		System:	Heat-off-cool		Fan:		on-auto

8403-049	——	2 stage heat,		2 stage cool
1F93-380		Electronic	Programmable

8403-043		1 stage heat,		1 stage cool,		Mercury
	——	System:	Heat-off-cool		Fan:		on-auto
CM200
		Snap Action

		1 stage heat,		1 stage cool,		Mercury
8403-048	——	System:	Heat-off-cool Fan:				on-auto
T8400C1313		Electronic	Non-Programmable
8403-019	8404-012	2 stage heat, 1 stage cool,				Mercury
T874C1760	Q674A1001	System:	heat-auto-cool		Fan:		on-auto

IMPORTANT NOTE: Only the thermostat and subbase combinations as shown above will work with this equipment. The thermostat and subbase MUST be matched, and correct operation can be assured only by proper selection and application of these parts.

Manual 2100-324 Page 10

P1060A1, P1142A3, P1148A1 specifications

Bard P1148A1, P1142A3, and P1060A1 are high-performance vascular access products designed to meet the diverse needs of medical professionals in various healthcare settings. These devices, developed by Bard, are renowned for their innovative technologies and superior characteristics that enhance patient care and facilitate clinical procedures.

The Bard P1148A1 is a peripherally inserted central catheter (PICC) designed for long-term intravenous therapy, including chemotherapy and antibiotics. Its key features include a strong yet flexible design that allows for easy insertion and maintenance of the catheter over extended periods. The P1148A1 utilizes advanced materials that minimize the risk of thrombosis and infection, pivotal considerations in central line management. The catheter is equipped with a specialized tip configuration that promotes optimal blood flow and reduces complications.

Moving to the Bard P1142A3, this device serves a similar purpose but incorporates unique technologies that enhance its usability. The P1142A3 boasts a hydrophilic coating which facilitates smoother insertions and reduces friction during catheter placements. This is particularly valuable in pediatric and geriatric populations, where gentler approaches are essential. Additionally, the P1142A3 is engineered with multiple lumens, allowing simultaneous administration of fluids, medications, and blood products. This multipurpose functionality enhances efficiency in clinical settings, reducing the need for multiple venipunctures.

On the other hand, the Bard P1060A1 is designed with a focus on short-term vascular access. This catheter is particularly effective for emergency situations and critical care, offering rapid placement and reliable performance. One of its main characteristics is a streamlined design that minimizes the overall footprint, making it an ideal choice for patients with limited vein access. The P1060A1 is also equipped with a safety mechanism that reduces the risk of accidental needlesticks, addressing a critical safety concern in medical environments.

Overall, Bard's P1148A1, P1142A3, and P1060A1 products exemplify innovation in vascular access technology. With features designed to enhance insertion techniques, improve patient outcomes, and ensure safety in healthcare settings, these catheters stand as key tools in modern medical practice. Their robust design and advanced materials align with the needs of both healthcare providers and patients, making them essential components of effective vascular access strategies.