Heat Controller HSS Series Installation, Operation & Maintenance Instructions Manual page 7

Table 1b: GeoMax 2 (HTS) Air Handler Characteristics for Brands other than Above Models
Model*
024 - Part Load
024 - Full Load
036 - Part Load
036 - Full Load
048 - Part Load
048 - Full Load
060 - Full Load
* Nominal tons are at ARI/ISO 13256-1 GLHP conditions. Two-stage units may be operated in single-stage mode if desired, where smaller
capacity is required. For example, a model 026 may be used as a 1-1/2 ton unit if "locked" into 1st stage operation only. If PSC fan is used,
unit must be "locked" into either 1st or 2nd stage. An ECM fan is required for two-stage operation and for ARI ratings. Size air handler for
"Full Load" if operating in two-stage mode.
**When selecting an air handler based upon the above conditions, choose entering WB temperature of 67ºF. Use evaporator temperature,
CFM and capacity requirements as listed above. The air handler capacity must be at least at the minimum capacity shown in the table in
order for the ARI rating condition to be valid. See Figure 1 for an example selection.
Indoor Coil Selection - For HSS R-22 Units
Geothermal split system heat pumps with R-22 refrigerant are rated in the ARI directory with a "generic" indoor coil match and
PSC fan. Selection of air handlers that attain the published ARI ratings must meet or exceed the specifications listed in Table
2. A TXV is required. Cap tubes and fixed orifices are not
acceptable.
Table 2: R-22 Air Handler Characteristics
Nominal
Model*
Tons*
018 1.5
024 2.0
030 2.5
036 3.0
042 3.5
048 4.0
060 5.0
* Nominal tons are at ARI/ISO 13256-1 GLHP conditions.
**When selecting an air handler based upon the above conditions, choose entering WB temperature of 67ºF. Use evaporator temperature,
CFM and capacity requirements as listed above. The air handler capacity must be at least at the minimum capacity shown in the table in
order for the ARI rating condition to be valid. See Figure 1 for an example selection.
Nominal Evaporator
Tons* Temp (ºF)
1.5 50
2.0 52
2.5 51
3.0 50
3.5 47
4.0 48
5.0 48
Evaporator
Temp (ºF)
50
47
49
48
45
46
45
w w w. h e a t c o n t o l l e r. c o m
T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r
R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A
CFM
530
880
700
1200
1000
1650
1850
Capacity
CFM
(MBtuh)**
600 18.5 - 21.3
800 25.5 - 29.3
1000 31.5 - 36.2
1200 37.0 - 42.5
1400 42.2 - 48.5
1600 50.0 - 57.5
2000 58.0 - 66.7
R e v. : 5 J u n e , 2 0 0 8
Equipment Selection
Capacity
(MBtuh)**
19.2 - 22.4
24.2 - 28.2
25.2 - 29.2
34.5 - 40.1
34.3 - 39.9
46.3 - 53.8
54.5 - 63.3
7