Weil-McLain PLUS LINE PLUS-E017-A/1206 - Manual (Page 10)

10 Part Number PLUS-E017-A/1206
PLUS LINE
Indirect-Fired Water Heaters – Series 3
Water heater piping
continued
A2
Figure 3
Piping — OPTION 2
Models 30/40/60/80 or
Plus 40/60/80
(Required for Commonwealth of
Massachusetts)
Drain valve
GOLD Plus 30/40/60/80
or Plus 40/60/80
Option 2
Apply the following and Figure to water heaters installed in Massachusetts. The drain valve
is mounted in the AUX tapping on top of the water heater.
1. Insert a close nipple and then an open-ended “draining” dip tube into the AUX tapping
on top of the heater.
2. Connect a ¾” NPT elbow to the AUX tapping, using suitable pipe dope or tape.
. Pipe the drain valve (supplied with water heater) to the elbow, using suitable pipe dope or
tape, as shown in Figure .
. Pipe the T & P relief valve in the run of the ¾” NPT brass tee (supplied with heater), located
in the domestic water outlet piping as shown in Figure .
An expansion tank may be required on
the DHW piping. See Thermal expan-
sion WARNING on page 1. Failure to
comply could result in severe personal
injury, death or substantial property
damage.
When the water supply pressure is higher than 0 psig, install a pressure-reducing valve on the cold water supply
line to prevent leakage from the T & P relief valve.