Installation Instructions

7
CHECK AND ADJUST UNIT TEMPERATURE RISE
Check and adjust unit temperature rise(s) as described in the
installation manual.
Temperature rise must be within the range shown on the fur-
nace rating plate.
HANG11 and 12 and HALP10
The following adjustments and checks are a required part of
this conversion. Adjustments and checks include:
• Leak checking orifices
• Checking and adjusting line and manifold gas pres-
sures
• Verifying proper unit operation (input rate, operational
sequence, burner flame, temperature rise, etc.)
ORIFICE LEAK CHECK
Leak check burner orifice threads using a soap solution.
LINE PRESSURE CHECK
1. Shut OFF gas at the manual gas shutoff valve and turn
OFF power to the unit.
2. Connect a calibrated water manometer or appropriate
gas pressure gauge at either the gas valve inlet pres-
sure tap or gas piping drip leg (see Figures 2 and 3).
3. Turn ON the power and gas, put the unit into heating
cycle and turn on all other gas consuming appliances.
4. Measure the gas supply pressure with the burners firing.
The inlet gas pressure for propane gas must be between
11.0 and 13.0 inches W.C. If supply pressure differs
from required, make necessary adjustments to pressure
regulator(s), gas piping, etc.
5. Turn OFF gas to the unit at the manual shutoff valve and
disconnect manometer. Reinstall line pressure tap plug.
Turn OFF any unnecessary appliances started in step 3.
MANIFOLD PRESSURE CHECK
Only small variations in gas flow should be made by adjusting
the gas valve pressure regulator. See Table 6 for the required
propane gas manifold pressure.
Propane Gas Manifold Pressure
9.7 to 10.3" W.C.
Table 6
1. Turn OFF gas to the unit at the manual gas shutoff valve.
2. Connect a calibrated water manometer or appropriate
gas pressure gauge at the gas valve outlet pressure tap.
3. Turn ON gas supply and operate unit.
4. Remove the cap screw from the manifold pressure regu-
lator adjustment location.
5. Adjust the manifold regulator to the required manifold
pressure (Table 6).
6. Reinstall the manifold regulator cap screw. Confirm
manifold pressure.
7. Turn OFF gas supply to unit. Disconnect manometer, re-
install manifold pressure tap plug.
UNIT OPERATION CHECKS - HALP10
Verify the gas input rate by checking that the appropriate
orifices have been installed and the manifold pressure has
been set as stated in these instructions.