WaterFurnace Envision Hydronic - Manual (Page 11)

11
NSKW INSTALLATION MANUAL
LOAD PUMP
HYDRONIC
LOAD
Source OUT
P/T
Ports P/T
Ports
Ball Valve
Dielectric
Unions
Dielectric
Unions
WaterFurnace
NSKW Series
NOTES:
* A 207 kPa pressure relief valve (Part No: SRV30) should be used in
hydronic applications.
** Vent valve or Pressure/Temperature port at highest point in return line prior to ball valve.
Expansion
Tank
Air
Vent
Pressure
Gauge
207 kPa
RELIEF VALVE
Air
Separator
FROM
HWG
TO
HWG
Back Flow Preventer /
Pressure Relief Valve
Source IN
GEO
STORAGE
TANK
PUMP
HOT
(Piped in
series to
an electric
water heater)
COLD
DOMESTIC
Dip Tube
Ball Valve
Vent Valve or
P/T Port**
Suggested Domestic Water Heater Hookup
Potable Water Systems cont.
NOTES:
1) Unions and valves must be installed so that acid flushing
of the heat exchanger is possible.
2) Route thermistor wires to NSKW. Remove yellow
thermistor wires on TB 3 and 4 from control box and
connect thermistor wires from geothermal storage tank.
Set the pump sampling (PS) in the set up of the control
board to continuously (C) sampling (reference Note 5 in
the Wiring Schematic).