LAARS NeoTherm LC NTH (Sizes 1000-1700 MBTU/h) - Installation Manual User Manual
Page 3
pg 3 of 6
H2352500B
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Litho in U.S.A. © Laars Heating Systems 1404 Document 7025B
• Connect the White
wire to the boiler
pump connections on
boiler Terminal Block
(
tB5) across from
the other white wire
at location 4A.
• Connect the
Black wire to the
other boiler pump
connection on boiler
Terminal Block (tB5)
at location 3A.
• Land the field 120V supply onto the #4A
boiler pump connection on the boiler
terminal block (
tB5).
• Connect the Black VAri-PriMe wire to
the other boiler pump connection on
boiler Terminal Block (tB5) at location
3A.
• Connect the white VAri-PriMe wire, the
field 120V supply neutral wire, and the
customer supplied 120VAC pump relay
neutral wires all together. (See wiring
diagram on last page).
1700 MBTU/h
1000 MBTU/h
1000 MBTU/h
• Locate the Brown wire coming from the
top gas valve. Trace the wire to the spade
connection with the Blue/White wire. Unplug
the connectors and insert the Blue wire and
connectors from the VAri-PriMe unit.
• Locate the Brown wire coming from the
bottom gas valve. Trace the wire to the spade
connection with the Blue/White wire. Unplug
the connectors and insert the Blue/red wire
and connectors from the VAri-PriMe unit.
All NeoTherm LC 1700 units include a dry
contact that requires an alternate power source.
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
Photo 3
Photo 4
Photo 5