Carrier N92ESN Installation, Start-Up, Operating And Service And Maintenance Instructions page 51

N92ESN: Installation, Start-up, Operating and Service and Maintenance Instructions
g. If clocked rate does not match required input from Step 1,
increase manifold pressure to increase input or decrease manifold
pressure to decrease input. Repeat steps b through e until correct
input is achieved. Re-install regulator seal cap on gas valve.
Table 19 – Orifice Size and Manifold Pressure (in. w.c.) for Gas
Input Rate
SINGLE-STAGE FURNACE
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE V A G G . S A
RANGE HEAT VALUE 0.58
AT ALTITUDE Orifice Manifold
ft (m) (Btu/cu ft) No. Pressure
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
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
S E P C F I C I G R A I V Y T F O N A U T R L A G S A
0.60 0.62
Orifice Manifold Orifice Manifold Orifice
No. Pressure No. Pressure No.
3.8 42 3.2 42 3.3 42
3.6 43 3.7 43 3.8 42
3.4 43 3.5 43 3.6 43
3.7 44 3.8 43 3.4 43
3.5 44 3.6 44 3.8 43
3.3 44 3.5 44 3.6 44
3.2 44 3.3 44 3.4 44
3.7 45 3.8 44 3.3 44
3.7 46 3.8 45 3.8 44
3.4 42 3.5 42 3.6 42
3.8 42 3.3 42 3.4 42
3.6 43 3.7 42 3.2 42
3.4 43 3.5 43 3.7 43
3.7 44 3.8 43 3.5 43
3.5 44 3.6 44 3.8 43
3.3 44 3.4 44 3.6 44
3.2 44 3.3 44 3.4 44
3.0 44 3.1 44 3.2 44
3.3 42 3.4 42 3.5 42
3.8 42 3.2 42 3.3 42
3.6 43 3.7 43 3.8 42
3.8 43 3.5 43 3.6 43
3.6 44 3.7 43 3.4 43
3.4 44 3.5 44 3.7 44
3.2 44 3.4 44 3.5 44
3.1 44 3.2 44 3.3 44
3.3 42 3.4 42 3.5 42
3.7 43 3.8 42 3.3 42
3.5 43 3.6 43 3.7 43
3.8 43 3.4 43 3.5 43
3.5 44 3.7 44 3.8 43
3.3 44 3.5 44 3.6 44
3.2 44 3.3 44 3.4 44
3.0 44 3.1 44 3.2 44
3.2 42 3.3 42 3.4 42
3.7 43 3.8 42 3.2 42
3.4 43 3.5 43 3.7 43
3.7 44 3.8 43 3.4 43
3.5 44 3.6 44 3.7 44
3.3 44 3.4 44 3.5 44
3.1 44 3.2 44 3.3 44
2.9 44 3.0 44 3.1 44
3.4 42 3.5 42 3.6 42
3.2 42 3.3 42 3.4 42
3.6 43 3.7 43 3.8 42
3.4 43 3.5 43 3.6 43
3.6 44 3.7
43 3.4 43
3.4 44 3.5 44 3.6 44
3.2 44 3.3 44 3.4 44
3.0 44 3.1 44 3.2 44
Table 19 - Orifice Size and Manifold Pressure (in. w.c.) for Gas
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE A V . G
RANGE
HEAT VALUE
AT ALTITUDE
ft (m) (Btu/cu ft)
650
7001 675
(2134) 700
0.64
725
to
Manifold
750
Pressure
8000 775
3.4
(2438) 800
3.2
825
3.7
625
3.6
8001 650
3.4
(2439) 675
3.7
700
to
3.5 725
3.4 9000 750
(2743) 775
3.2
9001 600
3.7
(2744) 625
3.5
650
3.3
to
675
3.8
10000 700
3.6
(3048) 725
3.4
* Orifice numbers shown in BOLD are factory-installed.
3.7
3.5
3. Restore furnace to normal operating condition.
3.3
a. Turn gas valve ON/OFF switch to OFF.
3.6
b. Remove water column manometer or similar device from
3.4
3.2 manifold pressure tap.
3.7
c. Tighten set screw on manifold tower pressure tap with 3/32-in.
3.5
hex wrench, or if ⅛-in. NPT plug was removed, apply pipe dope
3.8
sparingly to end of plug and re-install in the gas valve.
3.6
3.4
d. Turn gas valve ON/OFF switch to ON.
3.6
e. Check for gas leaks and verify furnace operation.
3.4
3.8
3.6
3.4
3.7
FIRE HAZARD
3.5
Failure to follow this warning could result in personal injury, death,
3.3
3.5
and/or property damage.
3.3
Manifold pressure tap set screw must be tightened and 1/8-in. NPT pipe
3.8
plug must be installed to prevent gas leaks.
3.5
3.8
3.6
Adjust Temperature Rise
3.4
3.2 NOTE: Blower door must be installed when taking temperature rise
3.8
reading. Leaving blower door off will result in incorrect temperature
3.5
measurements, due to possible changes in duct static pressure and
3.3
airflow.
3.7
3.5
3.7
3.5
3.3
FURNACE DAMAGE HAZARD
A11253A
Failure to follow this caution may result in:
- Overheating the heat exchangers or condensing flue gases in
heat exchanger areas not designed for condensate.
- Shortened furnace life
- Component damage.
Temperature rise must be within limits specified on furnace rating plate.
Recommended operation is at midpoint of rise range or slightly above.
This furnace must operate within the temperature rise ranges specified
on the furnace rating plate. Determine the air temperature as follows:
1. Place duct thermometers in return and supply ducts as close to
furnace as possible. Be sure thermometers do not "see" heat
51
Input Rate (Cont.)
SINGLE-STAGE FURNACE
G A S S P E C F I C I G R A V T I Y O F
0.58 0.60
Orifice Manifold Orifice Manifold Orifice
No. Pressure No. Pressure No.
42 3.4 42 3.5
43 3.8 42 3.2
43 3.5 43 3.7
44 3.8 43 3.4
44 3.5 44 3.7
44 3.3 44 3.4
44 3.1 44 3.2
44 2.9 44 3.0
42 3.4 42 3.5
43 3.8 42 3.2
43 3.5 43 3.6
44 3.7 43 3.4
44 3.5 44 3.6
44 3.3 44 3.4
44 3.0 44 3.2
42 3.3 42 3.4
43 3.7 42 3.2
43 3.5 43 3.6
44 3.7 44 3.8
44 3.4 44 3.5
44 3.2 44 3.3
WARNING
!
CAUTION
!
N A T U R A L G A S
0.62 0.64
Manifold Orifice Manifold
Pressure No. Pressure
42 3.6 42 3.7
42 3.3 42 3.4
43 3.8 42 3.2
43 3.5 43 3.6
44 3.8 43 3.4
44 3.5 44 3.7
44 3.3 44 3.4
44 3.1 44 3.2
42 3.6 42 3.7
42 3.3 42 3.4
43 3.7 42 3.2
43 3.5 43 3.6
44 3.7 44 3.8
44 3.5 44 3.6
44 3.3 44 3.4
42 3.6 42 3.7
42 3.3 42 3.4
43 3.7 43 3.8
43 3.4 43 3.5
44 3.7 44 3.8
44 3.4 44 3.5
A11253B