Installation Manual

Demand Duo™ H-Series Installation and Operation Manual 40
A Hot Water Outlet *
B Hot Water Outlet Valve *
C Cold and Hot Unions *
D
Temperature-Pressure Relief
Valve
E
Operation Unit / Temperature
Control
F
Temperature-Pressure Relief
Valve Discharge Pipe
(do not cap, plug, or reduce)
*
G
Pressure Relief Valve Discharge
Pipe (do not cap, plug, or re-
*
H
Condensate Discharge Pipe
(Must include air gap)
*
I Drain Pan *
J
Vent pipe (PVC Room Air shown
for illustration purposes, see
venting section for other options)
*
K Gas Control Valve *
L Gas Union *
M Drip Leg (Sediment Trap) *
N Cold Water Supply Valve *
O Cold Water Supply *
P Thermal Expansion Tank *
Q Non-Tempered Supply Line *
R Thermostatic Mixing Valve *
S Purge Line *
T Check Valve *
* Field Supplied
Mixing Valve Installation
Hot Water
Supply
A
B
C
D
O
N
P
J
E
I
F
M
L
K
R
Q
S
G
H
D
Figure 41
Figure 42
Cold Water Supply
T