PG
8
PG
8
HVAC Selection
• Set the
HVAC TYPE
switch in the
NORM
position if you have
conventional natural gas, propane, oil, or electric heat. If you
have a HEAT PUMP system set the
HVAC TYPE
switch to
HP
.
• Set the
HEAT SOURCE
switch in the
GAS
position if you have normal gas or oil heat or if you have
a heat pump with gas or oil auxiliary heat. Put the
HEAT SOURCE
in the
ELEC
position if you have
normal electric heat or if you have a heat pump with electric auxiliary heat.
Install 3 AA Batteries
• Install 3 AA alkaline batteries [required] following
the marked polarity in the battery compartment.
Put the lower battery in negative end first against
the spring, then push the positive end in. Then
insert the last 2 batteries as shown.
IMPORTANT:
Press the RESET button (under
top cover) to implement the HVAC switch selections.
• With all the wires connected it is time to turn the AC power back on. Do this at the breaker you used
to switch it off. The 3M-50 will power-up in the OFF mode. Your 3M-50 is not configured to operate
your HVAC system yet. You must now configure your thermostat for your HVAC system.
GA
S
ELEC
N
ORM
H
P
R
E
S
ET
HVAC
TY
P
E
HEAT
SO
U
R
CE
AA
AA
AA
1
2
3
