WINCHESTER
BY
MORTEX
PRODUCTS
INC
FORT
WORTH,
TX
76106
Page
11
Power wires can enter through the side of the unit or through
the auxiliary entrance, located in the bottom of the unit.
When bringing wiring through the bottom of the furnace,
cable connectors must be installed to hold wiring in place and
to relieve any strain on the wiring.
These connectors will also serve as a seal between the furnace
and the floor. Thus, additional sealing is not required.
The use of a five-conductor cable from the thermostat to the
furnace is recommended for typical heating or heating /
cooling installations with a three-conductor cable from the
furnace to the condenser.
A seven-conductor cable from the thermostat to the furnace is
recommended for a typical heat pump installation with a five-
conductor cable from the furnace to the condenser.
The thermostat wire colors and the typical heating / cooling
connections are listed in Table 10.
The thermostat wire colors and the typical heat pump heating /
cooling connections are listed in Table 11.
NOTE:
There is a 3 Amp slow blow bar fuse located on the
right side of the control box that protects the 24 VAC circuit.
Replace this fuse only with the equivalent 3 Amp fuse.
NOTE:
If the thermostat cable is on the left side of the
furnace place the grommet in the 3/8” hole on the left side of
the furnace casing. Run the thermostat wire cable through the
control box exiting the right side of the control box next to the
low voltage pigtails. Follow the steps for “
Typical Heating /
Cooling Thermostat Wiring Connections”
or “
Typical
Heat Pump - Heating / Cooling Thermostat Wiring
Connections”
Thermostat Installation
The adjustable heat anticipator in the thermostat is pre-set at
0.4 Amps. This setting should be checked at the time of
installation.
In some cases the thermostat may be a “self-setting" type in
which case no Amp setting will be found on the thermostat,
eliminating the need for any field adjustment.
Thermostat should be located on an inside wall in an open area
to more closely regulate average room air, preferably, where
there is air movement back to furnace. Locating height of
thermostat is important. Thermostat should be located
preferably in a hall way upstream from the furnace return
airflow, not within 3 feet of from any windows and 52 to 66
inches above the floor.
DO NOT
place the thermostat within three feet of any the
furnace supply air registers
DO NOT
place the thermostat within three feet of any the air
conditioner supply air registers
Maintenance, operating and/or programming instructions are
in the envelope accompanying the thermostat. Give the
envelope to the homeowner.
Separate Heating and Cooling System; Same Thermostat
If the furnace and the cooling unit have separate transformers
be sure to use a thermostat with isolated heating and cooling
contacts to prevent interconnection of Class II 24 Volt
Systems. Cycle furnace and the air conditioner separately to
make sure it will operate correctly.
Most new thermostats have a separate heating and cooling
contact for use with homes that have a furnace and air
conditioner that are completely separate and each have a 24
VAC transformer for system control. These thermostats have a
“RC” terminal for cooling and a “RH” terminal for heating.
Use these terminals to connect cooling unit (RC and Yellow)
and the furnace (RH and White) for separate operation. Refer
to Figure 21 and 22.
If your thermostat does not have the “RC” and “RH” terminals
it is recommended that you purchase a new thermostat.
Separate Heating and Cooling Thermostats
If the heating/cooling system in your house is a central heating
and cooling system but the furnace and the cooling unit are
controlled by separate thermostats then the use of a thermostat
interlock switch is required in order to prevent the furnace and
the air conditioner from operating at the same time.
Do not locate thermostat within three feet of any of the
following items:
1.
Furnace supply air registers
2.
Cooling unit supply air registers
3.
Lights or heat lamps
4.
Aquariums
5.
Televisions, stereo, amplifiers, surround sound
systems
6.
Stoves or any cooking appliance
7.
Refrigerator
8.
Washer and/or dryer
9.
Hot water tank
10.
Sink or near any hot water
11.
Within 15 feet of any electric space heater
12. Within 2 feet of any sunlight
