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THERMOSTAT INSTALLATION (
-
FURNACE
MODEL
2540
MUST USE THIS THERMOSTAT
The thermostat is very sensitive.
Locate thermostat 48˝ to 54˝ above floor on an
area where air circulation is good.
3/4˝ spacer between thermostat and exterior wall.
1. Be sure all electrical power has been disconnected from the air con-
ditioner, furnace and the power supply.
2. Do not install the thermostat where there are unusual heating condi-
tions: such as direct sunlight, heat producing appliances (television,
radio, wall lamp, etc.) or a furnace or air conditioner supply register.
3.
ATTACHING THE WALL THERMOSTAT
sub-base by gently squeezing the top and bottom. Pull wires through
access hole in base plate. Attach thermostat sub-base to the wall at
the desired mounting location. Mount the sub-base to the wall before
connecting the wires. See instruction provided with thermostat.
SYSTEM CHECKS
FIRE OR EXPLOSION
Never check for leaks with an open flame.
•
DIAGNOSTIC CHART
A diagnostic LED is located inside the exterior access cover on the out-
side edge of the horizontal (2) stage control board. The following
graph defines the codes.
NUMBER OF LED FLASHES
DIANOSTIC INFORMATION
1
Low Input voltage
2
Ignition Failure
3
Open High Limit
4
Stuck Sail Switch
5
Module Fault
ELECTRONIC
DIGITAL
THERMOSTAT
+12 VDC
RED
1
1
+THERMO
BLUE
2
2
3
3
-12 VDC
YELLOW
4
4
-THERMO
GREEN
5
5
6 6
BULK HEAD
CONNECTOR
CUSTOMER SUPPLIED WIRE
)
2H2C
MODEL
HANDLE WITH CARE AT ALL TIMES
wall. Pick a dry
INTERIOR
wall location must have a
EXTERIOR
. Separate the thermostat body from the
WARNING
LOCKOUT
SOFT
SOFT
SOFT
HARD
HARD
2-STAGE - MODEL 2540
4
WIRING
RED
YELLOW
RED
DUAL
CONTROL
6
5
4
3
2
1
WHITE
BLACK
ORANGE
BLUE
SAIL
SWITCH
LIMIT
SWITCH
IMPORTANT: If any original wire has to
be replaced, it must be replaced with
type 105˚C or it's equivalent.
: A
lockout is a condition that is timed and will make addition-
NOTE
SOFT
al attempts to correct the problem. A
of the thermostat or turning the power switch off then back on.
.
PROPANE GAS PRESSURE TEST
The furnace and any individual shut-off valve must be disconnected
from gas supply piping system during any pressure testing of system
at test pressures of more than 1/2 PSI.
Before furnace is connected piping systems must be tested to be leak
free. The test must maintain air pressure of at least 6˝ of mercury or 3
PSI for at least 10 minutes.
The entire piping system must be maintained within a range of 10-14˝
W.C. when all appliances are in operation. Test gas connections for
leakage with a leak test solution.
STATIC PRESSURE TEST
CASING STATIC PRESSURE TABLE
If duct static pressure cannot be set, casing static pressure should not exceed
the values listed below when taken cold.
DUCTING SYSTEM
DC
MODELS
Voltage greater than indicated will cause higher static readings.
Reducing the number of duct turns and stretching ducts will increase
air flow and reduce static pressure. Adding ducts or increasing dis-
charge system (hard ducting) will also reduce static pressure. NOTE:
Special tool required to take casing static pressures.
Location for Static Pressure Tap for casing is on the back of casing
(top left corner) (
MOTOR
BLACK
IGNITION
ELECTRODE
CONTROL
CHASSIS
GROUND
HIGH TENSION
RED
YELLOW
BROWN
CHASSIS
GROUND
VALVE
4
HARD
OPERATING VOLTS
FLEXIBLE
12
0.25˝ W.C.
3).
FIG
lockout requires reset
HARD
0.35˝ W.C.
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