Instruction manual

14
A INSTALLATION INSTRUCTIONS
Length of Gas Pipe Capacity of Gas Pipe Size in MBTUH
1/2" 3/4" 1" 1 1/4"
10' 132 278 520 1050
20' 92 190 350 730
30' 73 152 285 590
40' 63 130 245 500
50' 115 215 440
75' 93 175 360
100' 79 150 305
150' 64 120 250
Additional length
to be added for 1.3' 1.7' 2.2' 2.7'
each bend or tee
3.6 Gas Supply (cont.)
3.8 Electrical Supply Connection
The heater must be connected to a 115V
60Hz, single phase electrical supply fused
to 15 amps,
Grounding is required as well as the
installation of a main emergency switch
immediately upstream from the heater.
An electrical junction box (see figures 1 and
3, item 26) is provided for connections for
both the line voltage of 115V 60 Hz (See
figure 6 item A) , and the room thermostat
at low voltage of 24Vac (See figure 6 item
B).
The cable wire of the line voltage must be
insered into the heater, through the pass-
cable positioned in the side of the idraulic
connections (see figure 7 and 8).
A Electrical supply
connection
B Room thermostat
connection
Figure 6 - Connecting the room
thermostat and electrical supply
3.7 Room Thermostat Connection
This is installed by removing the electrical
junction box cover indicated in fig.6, (see fig.1
and 3, item 26), and connecting the two wires
of the room thermostat, or zone valve control
thermostat, to the low voltage terminals,
(figure 6, item B). NOTE: first remove
factory installed jumper from terminals.
The room thermostat must always be located
in a point of the house where the temperature
is not subject to sudden changes.