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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"]
36mm [1.4"]
10mm [0.4"]
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
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"]
100mm [ 4"]
29mm [1.1"]
AIR INLET
WIRING THROUGHWAYS
WATER DRAIN VALVE
(WATER FILTER)
HOT WATER OUTLET
WATER DRAIN VALVE
(WATER FILTER)
Unit No.6
450mm [17.7"]
468mm [18.4"]
448mm [17.6"]
150mm [5.9"]
234mm [9.2"]
100mm [ 4"]
FLUE COLLAR
LED
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
Unit No.2
No.1
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
NC250-DV-ASME
HOT WAER OUTLET
44mm [1.7"]
COLD WATER INLET
55mm [2.2"]
GAS INLET
56mm [2.2"]
(VIEW FROM TOP)
366mm [14.4"]
279mm [11"]
195mm [7.7"]
COLD WATER INLET (3/4")
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 THOROUGHWAYS
(120VAC)
GAS INLET (3/4")
59
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