MINI ULTRA ELECTRIC BOILERS Installation and operating manual (Revision: May 2015)
4
Section 1: TECHNICAL SPECIFICATIONS
Table 1: Ratings & Specifications at 208 & 240**Vac / 1ph
1
Suggested size at
240V/1ph.
3
Capacity
(KW)
Amps
2
Cable
MINI ULTRA
208 V 240 V 208 V 240 V
Electric element(s)
(240 V)
Stages
Cu
Al
Breaker
(Amp.)
3
2.2
3
10.9
12.5
1 x 3 KW
1
12
10
20
4.5
3.4
4.5
16.3
18.9
1 x 4.5 KW
1
10
10
30
6
4.5
6
21.8
25.0
2x 3 KW
1
8
6
40
7.5
5.6
7.5
27.2
31.2
1 x 3 KW + 1 x 4.5 KW
2
8
6
40
9
6.7
9
32.6
37.5
2 x 4.5 KW
2
8
6
50
12
9
12
43.5
50.0
2 x 6 KW
2
6
4
70
•
1
Electrical supply 120/240V or 120/208V – 1ph (L1-N-L2) with three conductors and a ground or
a supply with two conductors 240V or 208V – 1ph (L1-L2)with a ground if the application does not
require a 120V electrical supply for external accessories such as a pump, etc
•
2
Add the amperage of the circulating pump and other external accessories if they are connected
to the boiler (max. 5A).
•
3
A higher cable size could be required. In all cases the local electrical code has priority. The
electrician has the responsibility to select the appropriate size.
Table 2 : Boiler connections and dimensions
Connections
Inlet/Outlet
3/4 “ NPT Fem
Pressure relief valve
3/4 “ NPT Fem
Drain valve
3/4 “ NPT Fem
Shipping weight
47 lbs
Item
Dimension
(inches)
A
21-1/2
B
8-7/8
C
8-3/4
D
3-1/4
E
2-1/2
F
15
G
5
H
9-3/4
I
20
Some provinces or states, may require boilers built in conformity to ASME standards. If
such models are required, model with an “H” suffix shall be used.
Figure 1 : Dimensions
