Field Charging

Multi-Zone Heat Pump Refrigerant Piping Installation

Multi-Zone Heat Pump Refrigerant Charge Table

Circuit	Evaporator	Line	Line	Line	Factory	Total
Capacity Btuh	Pairing	Chg/ft	Length	Adjust	Charge	Charge
	WLH09		10 ft	3 oz		45 oz
9000	CAH12	0.25 oz	25 ft	6 oz	42	48 oz
	UNH09		50 ft	13 oz		55 oz
	WLH12		10 ft	3 oz		49 oz
12000	CAH12	0.25 oz	25 ft	6 oz	46	52 oz
	UNH12		50 ft	13 oz		59 oz
	WLH24		10 ft	6 oz		86 oz
18000	CAH24	0.56 oz	25 ft	14 oz	63	94 oz
	UNH24		50 ft **	28 oz **		108 oz
	WLH24		10 ft	6 oz		86 oz
24000	CAH24	0.56 oz	25 ft	14 oz	80	94 oz
	UNH24		50 ft	28 oz		108 oz

**Any 18,000 Btuh circuit with more than 87 feet of tubing (> 112 oz of total refrigerant charge) requires a 25W wrap around Crankcase Heater.

IMPORTANT NOTES:

1.To find the charge adjustment and system charge for any evaporator and tubing length:

Line Adjustment = (Line Chg/Ft) x Line Length System Total = Factory Charge + Line Adjustment

2.Round to the nearest ounce and allow for gauges and hoses.

3.use R22 refrigerant.

The use of the superheat method is highly recommended for field charging or checking the existing refrigerant charge in a system. Because each installation is different in terms of indoor air fow, refrigerant line length, etc.., the factory charge may not be correct for every application. To assure the best perfor- mance from the air-conditioner, the refrigerant charge should be checked and adjusted, if need be, on each installation.

For proper superheat readings, a standard low-side refrigerant gauge and an accurate thermometer are needed. A mercury or stem-type thermometer is not adequate for suction-line temperatures. We recom- mend electric thermocouple thermometers (available at most refrigeration wholesal-

ers); however an accurate remote-bulb thermometer can be used. When mea- suring the line temperature, be sure the thermometer is well insulated to assure accurate measurements. The chart below gives superheat values at various outdoor temperatures. Allow at least 5 minutes run- ning time between charge adjustments for the unit to stabilize.

The S & T series (S2HB, T2HB, T3HB & T4HB) have manifold access points on each of the service valves for the high and low pressures in cooling mode. There is an additional “common suction” access point above each service valve set to provide low pressure access in the heating mode as both service valves are at high side pressure.

Multi-zone Heat Pump Condensing Units

www.enviromaster.com

S2HB, T2HB, T3HB, T4HB specifications

The EMI T4HB, T3HB, T2HB, and S2HB models represent innovative advancements in the field of electronic security and surveillance technology. Each model is designed to meet specific security needs while integrating cutting-edge features, making them suitable for a variety of applications, from residential monitoring to large-scale facility management.

Starting with the T4HB, this model is known for its high-definition video capabilities and robust build quality. It offers 4K resolution, providing crystal-clear image quality that captures fine details, making it easier to identify subjects. The T4HB is equipped with advanced night vision technology, allowing it to perform optimally in low light conditions. Additionally, it features motion detection and smart analytics that minimize false alarms and provide users with real-time alerts. The integration with cloud storage solutions ensures that footage is securely saved and easily accessible from various devices.

The T3HB is a slightly scaled-back version, yet it does not compromise on essential features. It supports 1080p full HD resolution and incorporates many of the same intelligent analytics capabilities as its T4HB counterpart. With a wide-angle lens, the T3HB allows coverage of larger areas with fewer cameras. Its weather-resistant design makes it suitable for both indoor and outdoor installations, protecting it from the elements and ensuring reliable performance.

Next is the T2HB, which balances performance and affordability. This model retains high-definition video quality and basic motion detection features, making it ideal for budget-conscious consumers who still want reliable surveillance. The T2HB focuses on user-friendliness with simple setup processes and mobile app integration that allows for easy remote monitoring, making it an attractive option for homeowners.

Lastly, the S2HB is engineered for versatility. It combines the advantages of all previous models, providing excellent video quality and configurable settings for personalized security needs. The S2HB stands out with its smart home compatibility, enabling integration with various smart devices in a home security ecosystem. Its compact design allows for flexible mounting options without compromising performance.

Together, the EMI T4HB, T3HB, T2HB, and S2HB models reflect a commitment to quality, innovation, and user satisfaction in the modern security landscape. They cater to various needs, ensuring that users can find a suitable solution for their surveillance requirements while benefiting from advanced technologies that enhance security and peace of mind.