WaterFurnace Envision Hydronic (NSW) - Manual (Page 11)

11
NSW INSTALLATION MANUAL
Hydronic Section cont.
Synergy3D
Thermostat
Open the screw 2 turns only in the end of the pump motor
(if Grundfos ® pumps are used) to allow trapped air to be
discharged and to ensure the motor housing has been flooded.
Route thermistor wires to NSW. 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).
Adequate rate of flow (GPM) is very important to system
performance and long term reliability. Follow the guidelines
for recommended flow and pipe sizing in the NSW
recommendations table.
WaterFurnace Geothermal Storage Tank Thermostat
and Thermistor
Yellow Thermistor Wires Connected to TB (3 and 4) on
NSW Control Board
NSW
LOAD PUMP
HYDRONIC
LOAD
Source OUT
P/T Ports P/T Ports
Ball Valve
Dielectric
Unions
Dielectric
Unions
WaterFurnace
NSW Series
NOTES:
* A 30 psi pressure relief valve (Part No: SRV30) should be used in
hydronic applications.
** Vent valve or P/T port at highest point in return line prior to ball valve.
1-1/2 in.
FPT
Expansion
Tank
Air
Vent
Pressure
Gauge
30 psi
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/
P/T Port**