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Nordyne G6RC 90+ Manuale Utente

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2.
The thermostat wires (R, W, Y, and G) are
securely connected to the correct leads on
the terminal strip of the circuit board.
3.
The gas line service pressure does not
exceed 10.0 in. water column (0.36 psig),
and is not less than 4.5 in. water column
(0.16 psig) for natural gas. For LP gas the
line service pressure must not exceed 14 in.
water column (0.51 psig), and must not be
less than 11.0 in. W.C. (0.40 psig).
4.
The roll-out and vent safety manual reset
switches are closed. If necessary, press the
red button to reset a switch. See Figure 28
*  Time-delay fuses or HACR-type circuit breakers are required.
Table 11.  Electrical Data
for location. DO NOT install a jumper wire
across a switch to defeat its function. If a
switch reopens on start-up, DO NOT reset
the switch without identifying and correct-
ing the fault condition which caused the
switch to trip.
5.
The blower door is in place, closing the door
switch in the line voltage circuit.
6.
The gas line has been purged and all con-
nections are leak tight.
Start-Up Procedure
1.
Set the thermostat to the lowest setting.
2.
Close the disconnect(s) to provide line volt-
age to the furnace.
3.
Follow the procedures given on the operat-
ing instructions label attached to the furnace.
4.
Set the thermostat above room tempera-
ture and verify the sequence of operation.
(See the SEQUENCE OF OPERATION.)
5.
After the furnace has run for approximately
five minutes, set the thermostat below room
temperature and verify steps (9) through
(11) of the SEQUENCE OF OPERATION.
Verifying and Adjusting
Firing Rate
The firing rate must be verified for each installa-
tion to prevent over-firing the furnace.
NOTE:  The firing rate must not exceed the rate
shown on the furnace rating plate. At altitudes
above 2000 ft. the firing rate must be adjusted as
described in the high altitude section.
Figure 24.  Low Voltage Field,
Four-wire Heating/Cooling Applications
R    C      Y      G     W
A/C Condensing Unit
Condensing Unit
Control Box
Room
Thermostat
Flame Signal Light
(Yellow)
Status Light
(Red)
60 90 120 180
Blower Off
Timing
TWIN
3 Amp
Fuse
COM
24 V
HUM
Neutrals
Low Voltage
Connections
4 1
5 2
6 3
7
8
9
4
5
6
1
2
3
EAC
HUM
M1
M2
M3
COOL
HEAT
L1
XFMR
Unused Motor Leads
EAC
R     Y     G    W
Connect 
R & W
For
Heating
Only
FIELD WIRING
NOTE: The  "Y" 
terminal on the 
UTEC control board 
must be connected 
to the thermostat.
Furnace
Cabinet
Nominal
Maximum
Minimum
Maximum
Minimum
Maximum
Input
Width
 Electrical
 Operating  Operating
Furnace
Wire
Fuse or Circuit
(Btuh)
 (in.)
Supply
Voltage
Voltage
Amperes
Gauge
Breaker Amps*
40,000
14.25
115-60-1
127
103
12.2
14
15
60,000
14.25
115-60-1
127
103
12.2
14
15
80,000
19.75
115-60-1
127
103
14.1
14
15
100,000
19.75
115-60-1
127
103
14.1
14
15
120,000
22.50
115-60-1
127
103
17.3
12
20
Thermostat  Recommended Thermostat
Wire
                 Wire Length
Gauge
2-wire 
4 or 5-wire
(heating)
(cooling)
24
55 ft.
25 ft.
22
90 ft.
45 ft.
20
140 ft.
70 ft.
18
225 ft.
110 ft.