3
Installation
3
Connect new blue wire 3 to incoming compressor power and terminal 1
on the new relay
4
Connect new black wire 4 to the second incoming compressor power and
terminal 4 on the new relay.
5
Connect crankcase heater wires to terminals 2 and 5 on the new relay.
6
Connect the new relay coil (double tab terminals) to the terminals 4 and 6
on the customer terminal block. Use wires yellow 1 and orange 2.
Figure 1. Crankcase heater wiring diagram
Cr
a
nkc
a
se He
a
ter
Rel
a
y
W
i
re rel
a
y term
i
n
a
ls 1 & 4
to the compressor
cont
a
ctor
i
ncom
i
ng power
Connect he
a
ter ground w
i
re
to the un
i
t ch
a
ss
i
s ground
Connect Rel
a
y co
i
l le
a
ds to
term
i
n
a
l 4 & 6 on the
customer term
i
n
a
l block. The
rel
a
y co
i
l term
i
n
a
ls h
a
ve
double t
a
bs.
Connect he
a
ter le
a
ds
to rel
a
y term
i
n
a
ls 2 & 5
