Fill Water Supply Line; Drain Line; Auxiliary Drain - Nortec GS 100 Installation, User & Maintenance Manual

FILL WATER SUPPLY LINE

·
Each unit is supplied with a ½" NPT male
connection to the fill valve. Refer to Figure #21
for connection details. A minimum fill rate of 10
l/min (2.6 gal/min) is required for all unit sizes.
Allowable pressure range is 30-80 psig.
·
Always install a manual shut off within the
building to allow isolation of the water to the unit.
A union must be installed on the fill line prior to
the fill valve to allow for servicing.
·
Heat trace fill line piping above rooftop from the
pipe chase up to the fill valve.
Figure #21
Fill Water Connection

DRAIN LINE

·
GS Outdoor units have an integrated 12"w.c. trap
and vacuum break valve on the drain line. A
drain hose, connected to the outlet of the internal
trap, terminates at the pipe chase in the burner
section.
·
Route the drain hose to a drain funnel in the
building to provide an air gap before entering
main building drain/sewage system.
·
When the drain pump is activated, the tank drains
at a rate of 18-20 l/min (7-8 gal/min).
· Internal drain water tempering will ensure a
maximum of 140°F (60°C) during normal
operation.
1/2" NPT
Connection
Check Valve
(If required)
Drain Line
Connection
Manual
Shut-Off
Valve
(By others)
Pipe Chase
- 21 -
Figure #22
Drain Connection
N/O Drain
Valve
(Freeze
protection
option)

AUXILIARY DRAIN

·
Standard GS Outdoor units come with a capped
¾"NPT auxiliary drain connection at the bottom of
the tank. It is recommended to install a manual
shut-off valve on this connection and route to
drain (provide an air gap).
· GS Outdoor units equipped with a freeze
protection package have a normally open drain
valve mounted at the auxiliary drain connection
and piping that terminates at the pipe chase in
the base pan. This valve opens and will drain the
contents of the tank in the event of a power
failure. See Figure #22. Install a manual shut off
valve on this line and pipe to the drain funnel.
This valve must always be left in the open
position when in operation but can be closed for
servicing of the unit.
· Drain pipe should be capable of withstanding
200°F temperatures.
3/4" O.D.
Drain
Outlet
(Hose &
clamps
supplied)
Pipe Chase