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15.
Dimensions
4- 13mm [ 0.5"]
6-6 x 10mm [0.24 x 0.4"] OBLONG HOLE
10mm [0.4"]
170mm [6.7"]
140mm [5.5"]
100mm [3.9"]
70mm [2.8"]
36mm [1.4"]
10mm [0.4"]
36mm [1.4"]
70mm [2.8"]
100mm [3.9"]
140mm [5.5"]
170mm [6.7"]
6-6 x 10mm [0.24 x 0.4"] OBLONG HOLE
4- 13mm [ 0.5"]
16.
Multi-System
A. Installation without a recirculation system
Unit No.6
Hot Water Pipe
(1 1/4"-2")
• Insulate or apply heating materials to both the cold water supply piping and the hot water piping to
prevent freezing during cold weather and to prevent heat loss through the piping.
240mm [9.4"]
95mm [3.7"]
FLUE COLLAR
29mm [1.1"]
AIR INLET
WIRING THROUGHWAYS
WATER DRAIN VALVE
(WATER FILTER)
HOT WATER OUTLET
WATER DRAIN VALVE
Unit No.2
450mm [17.7"]
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
468mm [18.4"]
448mm [17.6"]
100mm [ 4"]
LED
AIR INLET
HOT WATER OUTLET (3/4")
WIRING THOROUGHWAYS
COLD WATER INLET
GAS INLET
WIRING THROUGHWAY
(120VAC)
Install one system controller
(SC-201-6M) for every six units.
Unit
No.1
NC250-SV-ASME
44mm [1.7"]
HOT WATER OUTLET
COLD WATER INLET
55mm [2.2"]
GAS INLET
56mm [2.2"]
(VIEW FROM TOP)
366mm [14.4"]
279mm [11"]
195mm [7.7"]
65mm [2.6"]
100mm [3.9"]
159mm [6.3"]
System Controller
Disconnect this Connector
* Disconnect this
connector
on units 2-6 also
System Select Connector
* Do not connect to
the connector.
Remote Controller
Gas pipe
G
Cold Water Supply Pipe
(1 1/4"-2")
(mm [inch] )
WIRING THOROUGHWAY
(120VAC)
GAS INLET (3/4")
COLD WATER INLET (3/4")
27
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