Heat Anticipator - Nordyne CMF95 Series Installation Instructions Manual

Heat Anticipator

Set the heat anticipator according to the instructions
supplied by the thermostat manufacturer. To determine
the heat anticipator setting:
1. Add the current draw of the system components; or
2. Measure the current flow on the thermostat R-W circuit
after the circulating blower motor has started.
Furnace
Furnace Cabinet
Model
Input Width
Number
(Btuh) (in.)
CMF95-
045 45,000 18
072 72,000 18
NOTE: Minimum wire gauge and maximum fuse/circuit breaker amperage are based on MCA
approved for installation with a 15 or 20 amp fuse/circuit breaker however wiring sizing must adhere to current version of the NEC and/or
applicable local codes depending upon the overcurrent protection.
Thermostat Wire Gauge
24
22
20
18
*
Time-delay fuses or circuit breakers are required.
Black (Hot)
White (Neutral)
Green or Bare
(Ground)
Field Line Voltage Wiring
Factory Line Voltage Wiring
22
Nominal Maximum Minimum
Electrical Operating Operating
Supply Voltage Voltage
115-60-1 127 103
115-60-1 127 103
2 - wire - Heating
55 ft.
90 ft.
140 ft.
225 ft.
Table 4. Wire Length & Voltage Specifications
Field Supplied
Field Supplied
Fused Service Disconnect w/in
Panel Sight of Furnace
Black
White
Ground
Figure 16. Line Voltage Field Wiring
A/C CONDENSING UNIT
3 AMP
ROOM
FUSE
THERMOSTAT
R
Connect
C
R & W
Y
For Heating
G
Only
W
9
NOTE: The "Y" terminal
8
7
on the control board
must be connected to the
thermostat for proper
6 3
cooling mode operation. 5
4 1
FIELD WIRING
LOW VOLTAGE
CONNECTION
NEUTRAL LEADS
Figure 15. Low Voltage Field, Four-wire
Heating/Cooling Applications
Maximum Minimum Maximum
Furnace Wire Fuse or Circuit
Amperes Gauge Breaker Amps*
11.0 14
10.4 14
and MOP
1
Recommended Thermostat Wire Length
4 or 5 wire - Cooling
Junction Box (may be int. or ext. to the furnace). These
connections can be made in the field supplied disconnect
at the furnace. NOTE: Connections made within the furnace
burner compartment do not require a junction box.
Black
White
Ground
Field Supplied
Panel Connector
CONDENSING UNIT
CONTROL BOX
EXPANSION PORT
(MOTOR CONNECTION)
SPEED
SELECT
STATUS
RED
GREEN
FLAME
YELLOW
6 3
180
BLOWER
2 120
5
OFF
90
4 1
DELAY
60
2
MOTOR SPEED TAPS
(NOT USED)
ELECTRONIC AIR CLEANER
HUMIDIFIER TAP
Minimum Mamimum
Circuit Overcurrent
Ampacity Protection
1
20 13.1
20 12.4
calculations. This furnace is
2
25 ft.
45 ft.
70 ft.
110 ft.
Black
White
Ground
2
21.7
20.4