MULTI-ZONE CONDENSER SEQUENCE OF OPERATION

EMI America Series multi-zone heat pump

Heat pump condensers utilize a reversing

condensers are designed to operate with

valve to provide reverse cycle operation.

EMI America Series indoor air handlers.

Therefore the outdoor unit will act as ei-

Both the condenser (outdoor unit) and

ther a condenser or an evaporator there-

evaporator (indoor unit) have a high Volt

by providing comfort cooling or heating to

service connection. Each is to be indepen-

the indoor space. The reversing valve is

dently connected to the electrical service

energized in cooling. Should the valve fail

panel. (See the unit name plate for the cor-

to actuate, the system will default to the

rect breaker type and size). The outdoor

heating mode of operation.

and indoor units are also connected to each

 

other through a low Volt interconnect wiring.

Cooling operation, Multi-zone Heat

A 24V transformer located in the indoor unit

Pump:

provides the low Volt power source.

Cooling mode operation requires that the

The S & T series (S2HA, T2HA, T3HA &

control (either unit mount or remote wall

mount thermostat) make a connection be-

T4HA) is a limited range heat pumps that

tween low-Volt terminals “R” and “Y” along

will provide comfort cooling or heat pump

with “R” and “O”. When the indoor control

operation operate at an outdoor tempera-

is placed in cooling mode, with the set point

ture range between 35°F and 115°F for

temperature below the room temperature,

cooling, 35°F and 75°F for (heat pump)

the reversing valve will energize (R & O)

heating. The outdoor unit is equipped

along with the compressor and outdoor fan

with a thermostat that will switch off the

(R & Y). When the indoor control is satis-

condenser when temperature falls below

fied and the room temperature falls below

35°F. For heat pump mode the condenser

the set temperature, the compressor and

operation will cease and then switch on

fan will de-energize. The EMI indoor unit

the indoor electric heat. For cooling mode,

is equipped with an anti-short cycle timer

condenser operation will cease.

(ASCT) will prevent the compressor from

The S & T series (S2HA, T2HA, T3HA &

re-starting for three minutes.

 

T4HA) limited range heat pump condens-

When the outdoor temperature falls below

ers are designed to operate as a single

35°F, compressor operation will cease.

stage cooling, two stage heating unit. For

 

full operation the unit should be matched

Heating operation, Multi-zone Heat

with an appropriate EMI indoor unit with

Pump:

electric heat and unit mounted controls or

Heating mode operation requires that the

a wall mounted thermostat.

control (either unit mount or remote wall

 

For two stage heating operation the indoor

mount thermostat) make a connection

unit must be equipped with an electric strip

between low-Volt terminals “R” and “Y”

heater.

only. When the indoor control is placed

See the instruction manual for the indoor

in heating mode, with the set point tem-

perature above room temperature, the

unit on the selection of the proper thermo-

compressor and outdoor fan (R & Y) will

stat for the system.

energize. When the indoor control is satis-

Condenser Operation:

fied and the room temperature rises above

the set temperature, the compressor and

The transformer located in the indoor unit

fan will de-energize. The EMI indoor unit

provides 24V, low-Volt control power to the

is equipped with an anti-short cycle timer

condenser (outdoor unit). This can be mea-

(ASCT) will prevent the compressor from

sured across low-Volt terminals “R” and “C”.

re-starting for three minutes.

Multi-zone Heat Pump Condensing Units

20

www.enviromaster.com

Page 20
Image 20
EMI T2HA, S2HA manual MULTI-ZONE Condenser Sequence of Operation, Rect breaker type and size. The outdoor

S2HA, T2HA specifications

The EMI T2HA and S2HA are advanced models of electric two-wheelers designed to cater to the modern commuter's needs while maintaining eco-friendliness and efficiency. These models have gained considerable attention for their performance, innovative technologies, and user-centric features.

One of the standout characteristics of the T2HA and S2HA is their powerful electric motor, which offers excellent acceleration and a smooth riding experience. With peak power output and impressive torque, these models ensure that riders can effortlessly navigate urban environments and tackle various terrains. The battery technology used in these electric scooters is also noteworthy. The models are equipped with high-capacity lithium-ion batteries that provide extended range, enabling riders to travel longer distances without the anxiety of running out of charge.

The design philosophy behind the T2HA and S2HA emphasizes both aesthetics and functionality. With sleek lines and modern styling, these electric two-wheelers not only appeal visually but are also ergonomically designed to enhance rider comfort. The adjustable seat height and spacious footboard make these scooters accessible for a wide range of users, ensuring a comfortable riding position.

In terms of technology, the T2HA and S2HA come equipped with advanced digital displays that provide real-time information about speed, battery status, and travel range. This integration of smart technology extends to connectivity features as well. The electric scooters are compatible with mobile applications that allow users to track ride statistics, determine battery health, and even locate the vehicle. Additionally, security features, such as smart locking systems, provide peace of mind when leaving the scooter unattended.

Safety is a paramount concern for any two-wheeler, and the T2HA and S2HA incorporate various features to ensure rider protection. The electric scooters are fitted with disc brakes, providing reliable stopping power. The incorporation of LED lights enhances visibility during night rides, while the durable frame construction contributes to overall stability.

In conclusion, the EMI T2HA and S2HA exemplify the growing demand for sustainable and efficient modes of transportation. With their blend of performance, design, and technology, they not only satisfy the daily commuting needs of riders but also contribute to reducing the carbon footprint, making them an excellent choice for environmentally conscious individuals.