Specifications
Steffes | 3050 Highway 22 North | Dickinson, North Dakota 58601-9413 | 701-483-5400
Rev 3
Model 9150
53kW Storage Module
Model 9180
80kW Storage Module
Input Voltage
277/480
347/600
277/480
347/600
Phase
3
3
3
3
Number of Wires
4
4
4
4
Charging Input (kW)
50.4
53.3
75.6
80.0
Elements - Quantity
Elements - Watts Each
12
4,200
12
4,444
18
4,200
18
4,444
Amps - Core Charging
60.65
51.23
90.97
76.84
Max. Pump & Blower Load (AMPS)
Tentative
2.3
1.9
2.3
1.9
Minimum Circuit Ampacity
78.69
66.41
116.59
98.43
Blowers/System Control Voltage
*
240V/208V
Storage Capacity - kWh
***
Storage Capacity - BTU
290
989,480
440
1,501,280
Pipe Size (Inlet/Outlet)
1 ½”
Required Primary Loop
Minimum of 12’ of 1 ½” pipe required in primary loop plumbing
Output Water Temperature
(selection range)
50
o
F to 185
o
F
Maximum Working Pressure
20 PSIG requires 30 PSI Pressure Relief Valve
60 PSIG requires 75 PSI Pressure Relief Valve (Standard)
125 PSIG requires 150 PSI Pressure Relief Valve
Flow Rate (Primary Loop)
1 GPM per 10,000 BTU of required output at 20
o
F Temperature Rise
(Not to exceed 30 GPM)
Internal Pressure Drop
(assuming 50% glycol mix)
.7 ft @ 15 GPM 1.8 ft @ 25 GPM
1.2 ft @ 20 GPM 2.5 ft @ 30 GPM
Approximate Heater Module Weight
(lbs)
900
970
Approximate Insulation
Block/Elements/Other Weight (lbs)
330
400
Approximate Brick Weight (lbs)
3,440
5,160
Number of Brick
192
288
Approximate Installed Weight (lbs)
**
4,670
6,530
*
Supply via step-down transformer - field installation.
**
Add approximately 500 lbs to arrive at shipping weight.
***
Storage capacity is based on a maximum core temperature of 1,400 degrees Fahrenheit.
