LAARS NeoTherm LC NTH (Sizes 1000-1700 MBTU/h) - Installation Manual User Manual

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pg 3 of 6

H2352500B

Customer Service and Product Support:

800.900.9276 • Fax 800.559.1583

Headquarters:

Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355

1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130

www.Laars.com

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

• 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

Photo 3

Photo 4

Photo 5