Demand Duo
™
R
-
Series Installation and Operation Manual
34
A
Hot Water Outlet
*
B
Hot Water Outlet Valve
*
C
Temperature
-
Pressure Relief
Valve
D
Cold and Hot Unions
*
E
Cold Water Supply Valve
*
F
Cold Water Supply
*
G
Thermal Expansion Tank
*
H
6 in. B
-
Vent
*
I
Operation Unit / Temperature
Control
J
Drain Pan
*
K
Pressure Relief Valve Dis-
charge Pipe (do not cap,
plug, or reduce)
L
Drip Leg (Sediment Trap)
M
Gas Union
N
Gas Valve
*
O
Thermostatic Mixing Valve
*
P
Non
-
Tempered Return Line
*
Q
Non
-
Tempered Supply Line
*
* Field Supplied
Mixing Valve Installation
A
B
H
D
C
I
K
J
E
N
M
L
Cold Water
Supply
Q
O
P
D
F
G
Hot Water Supply
Figure 30
Figure 31
