Volt Thermostatw; Gme8 / Ameh8 F; Setting The Heat Anticipator; Iring - Amana GDH8 Installation Instructions Manual

To ensure proper unit grounding, the ground wire should run
from the furnace ground screw located inside the furnace junc-
tion box all the way back to the electrical panel. NOTE: Do
not use gas piping as an electrical ground. To confirm proper
unit grounding, turn off the electrical power and perform the
following check.
1. Measure resistance between the neutral (white)
connection and one of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch
which interrupts unit voltage when the blower door is opened for
servicing. Do not defeat this switch.
24 V T W
OLT HERMOSTAT
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
Low voltage connections can be made through either the right
or left side panel. Thermostat wiring entrance holes are located
in the blower compartment. The following figure shows con-
nections for a "heat only" system and "heat/cool system".
Heating
Room
Thermostat
W
Furnace
Control
Typical Field Wiring (24 VAC Control Circuit)
This furnace is equipped with a 40 VA transformer to facilitate
use with most cooling equipment. Consult the wiring diagram,
located on the blower compartment door, for further details of
115 Volt and 24 Volt wiring.
A single-stage thermostat with only one heating stage can be
used to control this furnace.
GME8 & AMEH8 F
URNACES WITH
F W
IELD

IRING

The GME8 and AMEH8 model furnaces may be used with
a 2-stage outdoor air conditioner. A two stage cooling/single
stage gas heat thermostat is required, in addition to a field
supplied relay. The relay must have a 24VAC coil and
contacts rated for up to 1 horse power at 125VAC.
1. Install the field supplied relay on the control mount-
ing panel near the furnace ignition control. The relay
should be installed such that the motor leads will
reach the relay contact terminals.
2. Connect the "Y2" (high stage cool) thermostat
terminal to one coil terminal of the field supplied
relay. Connect the other field supplied relay coil
terminal to the "C" terminal on the furnace ignition
control. Typical 18AWG thermostat wire may be
used.
IRING
Heating/Cooling
Room Thermostat
W
Remote
Condensing
Unit
Furnace
Control
2-S C
TAGE ONDENSER
3. Connect the common terminal of the field supplied
relay to the "LINE-H" terminal on the furnace ignition
control. Use wiring having copper conductors only
and a temperature rating of at least 105°C.
4. Using the GME8 airflow tables in this manual,
determine the motor speed tap needed to deliver the
required high stage cooling airflow. Connect the
selected motor speed tap to the normally open
terminal on the field supplied relay. Use wiring
having copper conductors only and a temperature
rating of at least 105°C.
5. See the wiring schematic below.
ECO-TECH
MOTOR
T3
T4
Furnace
Control
Y
Y1
Y1
Remote Condensing Unit
Field Wiring for GME8 & AMEH8 Furnaces
with 2-Stage Condenser
S H A
ETTING THE EAT NTICIPATOR
The following method should be used in measuring the amp
draw of the control circuit to assure proper adjustment of the
thermostat heat anticipator
• Wrap the "R" leg around a clip-on ammeter 10 times.
• Energize the furnace in the heat mode.
• Record the reading.
• Divide this reading by 10.
• Set the heat anticipator on the thermostat to match
this reading.
Example: If the reading on the ammeter is "4", divide this by
10. The anticipator setting will be .4 amps.
18
T5
T2
Field
Supplied
Relay
Heating/Cooling
Y2
Room Thermostat
Y2