27
Leak Check
After the gas piping to the furnace is complete,
all connections must be tested for gas leaks.
!
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings
exactly could result in serious injury,
death or property damage.
Never test for gas leaks with an open
flame. Use a commercially available
soap solution made specifically for the
detection of leaks to check all connec-
tions. A fire or explosion may result
causing property damage, personal
injury or loss of life.
IMPORTANT NOTE: When pressure testing
gas supply lines at pressures greater than
1/2 psig (14 in. water column), the furnace
must be disconnected from the gas supply
piping system to prevent damage to the gas
control valve. If the test pressure is less than
or equal to 1/2 psig (14 in. water column), the
furnace must be isolated from the gas sup-
ply line by closing the manual shut-off
valve.
!
WARNING:
This furnace was equipped at the fac-
tory for use with natural gas only. A
special kit, supplied by the manufac-
turer, is required to convert the fur-
nace to operate on LP/propane gas.
Failure to use the proper conversion
kit can cause fire, explosion, property
damage, carbon monoxide poisoning,
personal injury, or death.
MANIFOLD PRESSURE
ADJUSTMENT
Manifold pressures for low and high stages are
independently adjustable. Adjustment tap
locations on the valve are shown in Figure 24b.
Manifold pressure would be adjusted below
procedure:
-
Turn off gas shut off valve outside furnace.
-
Install manometer on the gas valve at the
outlet pressure tap.
-
Turn on the shut off. Run furnace at high
fire and set manifold pressure. Also set
manifold pressure while running at low fire
(refer to Tables 7 and 8.)
-
Ensure plug is tight after removing
manometer.
Table 9. Natural and LP Gas Orifice Sizes
for Elevations between zero and
4999 ft. Above Sea Level
Table 10. Natural and LP gas Orifice Sizes
for Elevations between 5000 and 10,000 ft.
Above Sea Level
Furnace
Orifice
Orifice
High Fire Rating
Drill Size Drill Size
Plate Input (Btu/h)
Nat
LP
60,000
45
55
80,000
45
55
100,000
45
55
120,000
45
55
Furnace Rating
Orifice
Orifice
Plate Input
Drill Size Drill Size
(Btu/h)
Nat
LP
60,000
45
56
80,000
45
56
100,000
45
56
120,000
45
56
Figure 24b. Gas Valve
(Honeywell shown)
(White Rodgers shown)
(4) QUICK DI
S
CONNECT TERMINAL
S
1
S
T
S
TAGE
REGULATOR COVER
REGULATOR ADJU
S
T
BENEATH THI
S
S
CREW
VENT (.
33
0 DIA.
+DFT. PO
S
T)
ACCEPT
S
5/16” HO
S
E
CONNECTION
2ND
S
TAGE
REGULATOR COVER
REGULATOR ADJU
S
T
BENEATH THI
S
S
CREW
OUTLET PRE
SS
URE
PO
S
T
S
ET
S
CREW:
3
/
3
2
”
HEX HEAD (.
33
9 DIA. +DFT.)
ACCEPT
S
5/1
8”
HO
S
E CONNECTION
CONTROL
LABEL
INLET PRE
SS
URE PO
S
T
S
ET
S
CREW:
3
/
3
2
”
HEX HEAD
(.
33
9 DIA. +DFT.)
ACCEPT
S
5/1
8”
HO
S
E CONNECTION
VENT FITTING FOR 90 PLU
S
EFFICIENT APPLIANCE
S
LOW
S
TAGE ADJU
S
TMENT
UNDER VENT CAP
HIGH
S
TAGE ADJU
S
TMENT
UNDER VENT CAP
OUTLET PRE
SS
URE TAP
1/
8
NPT
INLET PRE
SS
URE TAP
1/
8
NPT
2-
S
TAGE
OPERATOR
Summary of Contents for TC060
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