Btuh To 140,000 Btuh - Carrier N95ESN Installation, Start-Up, Operating And Service And Maintenance Instructions

N95ESN: Installation, Start-up, Operating and Service and Maintenance Instructions
Check Safety Controls
The flame sensor, gas valve, and pressure switch were all checked in the
Start-up procedure section as part of normal operation.
1. Check Main Limit Switch
This control shuts off combustion system and energizes
air-circulating blower motor, if furnace overheats. By using this
method to check the temperature limit control, it can be established
that the limit is functioning properly and that the limit will operate
if there is a restricted return-air supply or motor failure. If the limit
control does not function during this test, the cause must be
determined and corrected.
a. Run furnace for at least 5 minutes.
b. Gradually block off return air with a piece of cardboard or sheet
metal until the limit trips.
c. Unblock return air to permit normal circulation.
d. Burners will re-light when furnace cools down.
2. Check Pressure Switch(es)
This control proves operation of the draft inducer blower.
a. Turn off 115-v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
c. Turn on 115-v power to furnace.
d. Set thermostat to "call for heat" and wait 1 minute. When low
pressure switch is functioning properly, hot surface igniter
should NOT glow and control diagnostic light flashes a status
code 3. If hot surface igniter glows when inducer motor is
disconnected, shut down furnace immediately.
e. Determine reason low pressure switch did not function properly
and correct condition.
f. Turn off 115-v power to furnace.
g. Reconnect inducer motor wires, replace door, and turn on 115-v
power.
h. Blower will run for 90 sec before beginning the call for heat
again.
i. Furnace should ignite normally.
Checklist
1. Put away tools and instruments. Clean up debris.
2. Verify that the jumper is removed from the TEST/TWIN terminal.
Verify that there is nothing plugged into the PLT connector. (Note:
If there is a jumper connector plugged into PLT, remove it and
discard.) See Fig. 37.
3. Verify that the Blower/Heat Off Delay jumpers are set as desired.
See Fig. 37 and Fig. 72.
4. Verify that there are no unsealed openings in the blower shelf or
casing.
5. Verify that the blower (lower door in upflow position) and control
("Main" or upper door in upflow position) doors are properly
installed.
6. Verify that the Status LED heartbeat (bright-dim). If not, check that
the power supply is energized and that the blower door is secure.
See Fig. 70 to interpret diagnostic codes.
7. Cycle test furnace with room thermostat to be sure that it operates
properly with the room thermostat. Check all modes including
Heat, Cool and Fan.
8. Check operation of accessories per manufacturer's instructions.
9. Review Owner's Manual with owner.
10. Attach entire literature packet to furnace.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 21 – Orifice Size and Manifold Pressure (in. w.c.) for Gas

40,000 BTUH to 140,000 BTUH

SINGLE-STAGE FURNACE
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE A V G . G A S
RANGE HEAT VALUE
AT ALTITUDE Orifice
ft (m)
(Btu/cu ft) No.
900 43
0 925 43
(0) 950 43
975 44
to 1000 44
1025 44
2000 1050 44
(610) 1075 45
1100 46
U.S.A. 800 42
2001 (611) 825 43
to 850 43
3000 (914) 875 43
900 44
Canada 925 44
2001 (611) 950 44
to 975 44
4500 (1372) 1000 44
775 42
3001 800 43
(915) 825 43
850 44
to
875 44
4000 900 44
(1219) 925 44
950 44
750 42
4001 775 43
(1220) 800 43
825 44
to
850 44
5000 875 44
(1524) 900 44
925 44
725 42
5001 750 43
(1525) 775 43
800 44
to
825 44
6000 850 44
(1829) 875 44
900 44
675 42
6001 700 42
(1830) 725 43
750 43
to
775 44
7000 800 44
(2133) 825 44
850 44
Table 21 (Continued) -Orifice Size and Manifold Pressure (in. w.c.)
for Gas Input Rate (Cont.)
40,000 BTUH to 140,000 BTUH
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE A V G . G A S
RANGE HEAT VALUE
AT ALTITUDE Orifice
ft (m) (Btu/cu ft) No.
650 42
7001 675 43
(2134) 700 43
725 44
to
750 44
8000 775 44
(2438) 800 44
825 44
625 42
8001 650 43
(2439) 675 43
700 44
to
725 44
9000 750 44
(2743) 775 44
9001 600 42
(2744) 625 43
650 43
to
675 44
10000 700 44
(3048) 725 44
* Orifice numbers shown in BOLD are factory-installed.
53
Input Rate
S P E C F I C I G R A V T I Y O F N A T U R A L G A S
0.58 0.60 0.62
Manifold Orifice Manifold Orifice Manifold
Pressure No. Pressure No. Pressure
3.8 42 3.2 42 3.3
3.6 43 3.7 43 3.8
3.4 43 3.5 43 3.6
3.7 44 3.8 43 3.4
3.5 44 3.6 44 3.8
3.3 44 3.5 44 3.6
3.2 44 3.3 44 3.4
3.7 45 3.8 44 3.3
3.7 46 3.8 45 3.8
3.4 42 3.5 42 3.6
3.8 42 3.3 42 3.4
3.6 43 3.7 42 3.2
3.4 43 3.5 43 3.7
3.7 44 3.8 43 3.5
3.5 44 3.6 44 3.8
3.3 44 3.4 44 3.6
3.2 44 3.3 44 3.4
3.0 44 3.1 44 3.2
3.3 42 3.4 42 3.5
3.8 42 3.2 42 3.3
3.6 43 3.7 43 3.8
3.8 43 3.5 43 3.6
3.6 44 3.7 43 3.4
3.4 44 3.5 44 3.7
3.2 44 3.4 44 3.5
3.1 44 3.2 44 3.3
3.3 42 3.4 42 3.5
3.7 43 3.8 42 3.3
3.5 43 3.6 43 3.7
3.8 43 3.4 43 3.5
3.5 44 3.7 44 3.8
3.3 44 3.5 44 3.6
3.2 44 3.3 44 3.4
3.0 44 3.1 44 3.2
3.2 42 3.3 42 3.4
3.7 43 3.8 42 3.2
3.4 43 3.5 43 3.7
3.7 44 3.8 43 3.4
3.5 44 3.6 44 3.7
3.3 44 3.4 44 3.5
3.1 44 3.2 44 3.3
2.9 44 3.0 44 3.1
3.4 42 3.5 42 3.6
3.2 42 3.3 42 3.4
3.6 43 3.7 43 3.8
3.4 43 3.5 43 3.6
3.6 44 3.7 43 3.4
3.4 44 3.5 44 3.6
3.2 44 3.3 44 3.4
3.0 44 3.1 44 3.2
SINGLE-STAGE FURNACE
S P E C F I C I G R A V T I Y O F N A T U R A L G A S
0.58 0.60 0.62
Manifold Orifice Manifold Orifice Manifold
Pressure No. Pressure No. Pressure
3.4 42 3.5 42 3.6
3.8 42 3.2 42 3.3
3.5 43 3.7 43 3.8
3.8 43 3.4 43 3.5
3.5 44 3.7 44 3.8
3.3 44 3.4 44 3.5
3.1 44 3.2 44 3.3
2.9 44 3.0 44 3.1
3.4 42 3.5 42 3.6
3.8 42 3.2 42 3.3
3.5 43 3.6 43 3.7
3.7 43 3.4 43 3.5
3.5 44 3.6 44 3.7
3.3 44 3.4 44 3.5
3.0 44 3.2 44 3.3
3.3 42 3.4 42 3.6
3.7 42 3.2 42 3.3
3.5 43 3.6 43 3.7
3.7 44 3.8 43 3.4
3.4 44 3.5 44 3.7
3.2 44 3.3 44 3.4
0.64
Orifice Manifold
No. Pressure
42 3.4
42 3.2
43 3.7
43 3.6
43 3.4
44 3.7
44 3.5
44 3.4
44 3.2
42 3.7
42 3.5
42 3.3
43 3.8
43 3.6
43 3.4
44 3.7
44 3.5
44 3.3
42 3.6
42 3.4
42 3.2
43 3.7
43 3.5
44 3.8
44 3.6
44 3.4
42 3.6
42 3.4
43 3.8
43 3.6
43 3.4
44 3.7
44 3.5
44 3.3
42 3.5
42 3.3
43 3.8
43 3.5
44 3.8
44 3.6
44 3.4
44 3.2
42 3.8
42 3.5
42 3.3
43 3.7
43 3.5
44 3.7
44 3.5
44 3.3
A11253A
0.64
Orifice Manifold
No. Pressure
42 3.7
42 3.4
42 3.2
43 3.6
43 3.4
44 3.7
44 3.4
44 3.2
42 3.7
42 3.4
42 3.2
43 3.6
44 3.8
44 3.6
44 3.4
42 3.7
42 3.4
43 3.8
43 3.5
44 3.8
44 3.5
A11253B