Comfort Plus Forced Air Heating System Specifications
| MODEL | 3120 | 4120 | 4130 | 4140 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Charging Input (kW) | 14.0 | 17.5 | 21.6 | 19.2 | 24.8 | 28.8 | 37.2 | 38.4 | 45.6 |
| Element Current Draw | 59 amps | 73 amps | 90 amps | 80 amps | 104 amps | 120 amps | 155 amps | 160 amps | 190 amps |
| Element Circuits Required | 2-40 amp | 2-50 amp | 2-60 amp | 3-40 amp | 3-50 amp | 4-40 amp | 4-50 amp | 4-50 amp | 4-60 amp |
| Blowers/Controls Circuit Required | 1-15 amp (6 amps maximum load) | 1-15 amp (7 amps maximum load) | |||||||
| Unit is factory configured to be connected to multiple line voltage circuits. If single feed to the element and blowers/controsl circuits is desired, an optional single feed kit is available. | |||||||||
| Storage Capacity | 86 kWh ( 293,432 BTU) |
125 kWh (426,500 BTU) |
180 kWh (614,160 BTU) |
240 kWh (818,880 BTU) |
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| The size and heating ability of the system required for an application is dependent on the heat loss of the area and the power company's off-peak hours. In addition, if the unit is not installed within the heated area, heat lost statically must be taken into account. Contact your local power company, a contractor, or Steffes Corporation for assistance in selecting an appropriately sized system. | |||||||||
| Approximate Installed Weight (lbs) | 1,562 | 2,183 | 3,031 | 3,859 | |||||
| Contact a building contractor or architect if you have structural weight concerns of the installation surface selected. Adhere to all national and local electrical and building code placement requirements for electrical heating appliances. | |||||||||
| Duct Openings Supply Air Outlet (1/2 HP Blower) Return Air Inlet |
10.1" x 16" 21.4" x 21.4" (factory built plenum) |
18" x 22.6" (in factory built plenum) 10.5" x 22.3" (in unit) or 21.4" x 21.4" (if using factory built plenum) |
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| Maximum Coil Size (W x D x H) |
21" x 21" x 24.25" |
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| The factory-built return air plenum is configured for housing an indoor coil. Dimensions listed are that of the inner coil area in this plenum. For larger coils, field provisions to the plenum are necessary or it will need to be supplied by the installer. | |||||||||
| Maximum Maintable Heat Loss 8 hours consecutive charge (BTU/hr) 12 hours consecutive charge (BTU/hr) 6/4/6/8 Charge Strategy |
20,414 30,621 30,621 |
23,512 31,350 38,276 |
23,512 31,350 47,097 |
27,996 41,994 41,994 |
34,175 45,566 54,242 |
41,994 62,991 62,991 |
49,212 65,615 81,363 |
55,992 83,988 83,988 |
65,615 87,487 99,735 |
| 1kW = 3,412 BTU/hr | 1kWh = 3,412 BTU | ||||||||
| (For Standard 240V systems. 208/277 charging also available. Blowers/system controls circuits can be field connected to 240 or 208 voltage). | |||||||||