Commercial Air Conditioner
Model: heat pump, 10SEER UNITS
13
The cooling load calculation determines the unit size. There are two capacities that enable the
equipment to provide comfort. The first is sensible capacity. How much sensible heat can the unit
remove? Sensible heat is the heat energy measured on the dry bulb thermometer.
The second form of heat is called latent or hidden heat. This is heat held in the humidity in the air.
Removing this heat does not affect a thermometer. However, removing the heat held in the moisture in
the air greatly increase comfort. A properly sized unit removes both forms of heat, producing a
comfortable living space. An oversized system cycles on and off too quickly and does not properly
remove humidify , producing an uncomfortable living space. Select the indoor and outdoor equipment
combination based on the manufacturer’s engineering data.
After the proper equipment combination has been selected, satisfying both sensible and latent
conditioning requirements, the system must be properly installed. Only then can the unit provide the
comfort the manufacturer built into it.
There are several factors that installers must consider.
●
Outdoor unit location
●
Proper equipment evacuation
●
Outdoor unit refrigerant charge
●
Indoor unit air flow
●
Indoor unit blower speed
●
Supply and return air duct design and sizing
●
System air balancing
●
Diffuser and return air grille location and sizing
Unit Dimensions
Model:HR18-60A1VAR
----A1VAR HR18
HR24 HR30 HR36 HR42 HR48 HR60
D
23[585] 23[585] 23[585] 23[585] 30 1/4[770] 30 1/4[770] 30 1/4 [770]
W 23[585] 23[585] 23[585] 23[585] 30 1/4[770] 30 1/4[770] 30 1/4 [770]
H
27 3/4[70
2
] 27 3/4[70
2
] 31 1/2[80
2
] 31 1/2[80
2
] 31 1/2[
798
] 31 1/2[
798
] 35 1/2[
898
]
[ ] Designates Metric Conversions
Table 6-1
