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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
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