Installation Instructions

6
HANG13, HANG14, and HALP11
INSPECT BURNER FLAME
The burner flames should be stable, soft and blue
(dust may cause orange tips but they must not be
yellow). They should extend directly outward from
the burners without curling, floating, or lifting off.
Check the burner flames for:
1. Good adjustment
2. Stable, soft and blue
3. Not curling, floating, or lifting off.
Figure 3
Burner Flame
CHECK AND ADJUST UNIT TEMPERATURE RISE
Check and adjust unit temperature rise(s) as de-
scribed in the installation manual.
Temperature rise must be within the range shown on
the furnace rating plate.
Adjustments and Checks - HALP11
The following adjustments and checks are required part
of this conversion. Adjustments and checks include:
• Leak checking orifices
• Checking and adjusting line and manifold gas
pressures
• Verifying proper unit operation (input rate, opera-
tional sequence, burner flame, temperature rise,
etc.)
NOTE: Propane gas conversions of two-stage gas
valves do not require a regulator spring replacement.
PERSONAL INJURY HAZARD
To prevent death, personal injury or
property damage due to fire or explosion,
do not use a flame to check for leaks.
ORIFICE LEAK CHECK
Leak check burner orifice threads using a soap solu-
tion.
Unit Operation Checks - HANG13 & 14
CHECK NORMAL OPERATING SEQUENCE OF IGNITION
SYSTEM
Check the normal operating sequence of the ignition
system to ensure burners light properly.
VERIFY GAS INPUT RATE(S)
1. Turn OFF gas supply to all other gas-burning appli-
ances except the furnace.
2. While the furnace is operating, time and record one
complete revolution of the small gas meter dial.
3. Calculate the number of seconds per cubic foot (sec/
ft
3
) of gas being delivered to the furnace. If the dial
is a one-cubic foot dial, divide the seconds recorded
in step 2 by 1. If the dial is a two-cubic foot dial, di-
vide the seconds recorded in step 2 by 2.
4. Calculate the furnace input rate in BTUs per hour
(BTU/hr). Input equals in the sum of the
installation’s heating value and conversion factor
(hours to seconds) divided by the number of sec-
onds per cubic foot. The measured input must not
be greater than the input indicated on the unit rating
plate.
INPUT CALCULATION EXAMPLE:
Installation’s gas heating (HTG) value: 1,000 BTU/ft
3
(Obtained from gas supplier)
Installation’s seconds per cubic foot: 34 sec/ ft
3
Conversion Factor (hours to seconds): 3600 sec/hr
Input = (Htg. value x 3600) ÷ seconds per cubic foot
Input = (1,000 BTU/ft
3
x 3600 sec/hr) ÷ 34 sec/ ft
3
Input = 106,000 BTU/hr
This measured input must agree with the derates for
your unit and altitude as indicated in Table 2.
Derating Example 1: GUVA115AX50 at 8,000 ft.
Sea level input = 115,000 BTU/hr [High Stage]
From Table 1: Derate at 8,000 ft. = 30.9 ± 4%
Since this range is at the mid point of the elevation
range, use the mid point of the derate: 30.9%.
New Input = 115,000 x (1 - .309) = 79,465 BTU/hr
Derating Example 2: GUVA115AX50 at 7,001 ft.
Sea level input = 115,000 BTU/hr [High Stage]
From Table 1: Derate at 7,001 ft. = 30.9 ± 4%
Since this range is at the lower end of the elevation
range, use the lower derate: (30.9 - 4) = 26.9%.
New Input = 115,000 x (1 - .269) = 84,065 BTU/hr
WARNING