WaterFurnace Envision Hydronic (NSW) - Manual (Page 15)

15
NSW INSTALLATION MANUAL
Electrical Data cont.
208 Volt Operation
All 208-230 volt units are factory wired for 230 volt
operation. To convert the unit from a 230V unit to a 208V
unit follow these steps:
1. Remove the blue transformer wire from terminal L2 on
the compressor contactor and secure the wire taking
care to insulate the end with electrical tape.
2. Locate the red transformer wire and connect it to the L2
terminal of the compressor contactor.
Electrical
Be sure the available power is the same voltage and phase
as that shown on the unit serial plate. Line and low voltage
wiring must be done in accordance with local codes or the
National Electric Code, whichever is applicable. Refer to
the Electrical Data table for wire and fuse or circuit breaker
sizing information.
Flow Center Pump Connection (208-230/60/1)
Two fuse internal terminal block connections with 1/4-inch
spade connectors are provided; one for the load pump
and one for the source pump. The source pump directly
connects to the fuse terminal block for the source pump.
The load pump directly connects to the fuse terminal block
for the load pump.
NSW Control Box Relocation
The NSW control box can be installed on the rear of the unit.
To relocate the control box, follow the procedures below.
1. Remove all power sources to the unit.
2. Remove the unit’s top panel.
3. Cut all plastic wire ties to the following:
a) High pressure switch (black wires)
b) Low pressure switch (blue wires)
c) Freeze sensing (yellow wires)
d) Load temperature sensor (black wires)
e) Compressor wires
4. Remove the four screws from the control box.
5. Relocate the control box to opposite end of the unit.
6. Using the screws removed in step 4 above, reattach the
control box.
7. Secure all wires so they do not come in contact with
refrigerant lines.
8. Replace the top of the unit.
9. Replace both access panels.
10. Reapply power sources.
NOTE: If geothermal storage tank is used, connect yellow
thermistor wires from the bottom access panel of the tank
to spade connectors 3 and 4 on the terminal block.