BTH Electric Boilers USE & CARE MANUAL
(Revision June.2014)
, Page
2.
Ratings & Specifications at 120/240** Vac/1ph (3 wires L1-N-L2):
MINI ULTRA
Cable*!
90C
Breaker!
*
Model
Capacity
KW/BTU at
240Vac**
Amps. !
Elements at
240Vac**
Electric
Element(s)
at 240Vac
Stages
Cu
Al
Amp.
MINI Ultra 6
6 / 20,470
25
2 x 3 KW
2
8
6
40
MINI Ultra 7.5
7.5/25,590
31
1X4.5+1X3K
2
8
6
40
MINI Ultra 9
9 / 30,710
37.5
2 x 4.5 KW
2
8
6
50
MINI Ultra 12
12 / 40,940
50
2 x 6 KW
2
6
6
70
! Add the amperage (Max. 5amp-1/6hp) of the circulating pump if it is connected directly to the boiler
* A higher capacity cable an breaker could be required. In all cases the local Electrical Code has priority.
** Can be connected to a 208Vac/1ph electrical supply. The resulting capacity will be of 75% of the
nominal capacity at 240V and the amperage will be of 87%.
Dimensions
Connections
Overall dimensions
Inlet/ heating return
3/4 “ NPT Fem
Height
21-1/2 inches
Outlet/ heating supply
3/4 “ NPT Fem
Width
9 inches
Pressure relief valve
3/4 “ NPT Fem
Depth
9 inches
Drain valve
3/4 “ NPT Fem
Weight
40 lbs.
Operating temp. range: 50°F (10C) to 190°F (88C). Maximum pressure : 30 psi (207kPa)
Figure 1.
