P-K SOLIS™
Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
Patterson-Kelley 2021
All Rights Reserved.
2701000090 P-K SOLIS NURO Installation and
Owners Manual (Rev A).docx
Page 17
High Voltage (TB2) Terminal Block (SL1500 & SL2000)
HOT L1
– Connect the 1
st
hot lead of the 208-240VAC, single phase, 60Hz electrical service to the
TB2-1 terminal.
HOT L2
– Connect the 2
nd
hot lead of the 208-240VAC, single phase, 60Hz electrical service to the
TB2-2 terminal.
NEUTRAL
– Connect the neutral lead of the 208-240VAC, single phase, 60Hz electrical service to the
TB2-3 terminal.
GROUND
– Connect the ground lead from the electrical service to the TB2-4 terminal.
Start Interlock #2
–
The Start Interlock #2 TB2-5 and TB2-6 terminals are in series with Start Interlock
#1 and provide additional connection points for auxiliary safety devices. This circuit is energized with
120VAC, so the contacts on any auxiliary safety devices must be rated for minimum 120VAC.
Be sure to check the
nameplate on the boiler
before connecting the
electrical supply.
N
OTICE
!
A dedicated earth ground
(green wire) is required to
avoid nuisance shutdowns.
Do not ground through the
conduit!
The high voltage (TB2)
terminal block on the SOLIS
SL-1500 & SL-2000
with
NURO controls contains two
hot leads (HOT L1 & HOT L2),
a neutral lead (NEUTRAL) and
a ground lead (GROUND) for
208- 240 VAC, single phase
60Hz electrical supply. This
terminal block (TB2) also
contains dry-contact relays
with a maximum voltage
rating of 240VAC and 1/2 Amp
maximum current capacity.
Incorrect wiring can result in
equipment damage, injury, or
death.