Installation Instructions

6
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 pressure tap
or gas piping drip leg (Figure 2).
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 5 for the required
propane gas manifold pressure.
Low Stage High Stage
5.7 to 6.3" w.c. 9.7 to 10.3" w.c.
Propane Gas Manifold Pressure
Table 5
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 high stage manifold pres-
sure regulator adjustment location.
5. Using an Allen wrench, adjust high stage manifold regula-
tor to the required manifold pressure (Table 5).
6. Reinstall the high stage manifold pressure regulator cap
screw. Confirm high stage manifold pressure.
7. Remove the cap screw from the low stage manifold pres-
sure regulator adjustment location.
8. Using an Allen wrench, adjust low stage manifold regulator
to the required manifold pressure.
9. Reinstall the low stage manifold regulator cap screw. Con-
firm low stage manifold pressure.
10. Turn OFF gas supply to unit. Disconnect manometer and
reinstall manifold pressure tap plug.
UNIT OPERATION CHECK - HALPS13
CHECK NORMAL OPERATING SEQUENCE OF
IGNTION SYSTEM
Check the normal operating sequence of the ignition system
to ensure burners light properly.
VERIFY GAS INPUT RATE(S)
Ensure that the appropriate orifices have been installed and
the manifold pressure has been set as specified in these in-
structions.
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, float-
ing, or lifting off.
CHECK AND ADJUST UNIT TEMPERATURE RISE
Check and adjust unit temperature rises as described in the
installation manual.
Temperature rise must be within the range shown on the fur-
nace rating plate.
LABEL ATTACHMENT
Attach conversion data plate, with correct input rating, adja-
cent to the unit rating plate. Use Table 6 to determine the
correct data plate to be applied.
Size Input (Btu/hr)
045 33,500
070 50,300
091 67,000
115 83,800
INPUT RATING
(Propane Gas: Standard Altitude)
Table 6
Post “conversion date certificate” adjacent to the unit rating
plate.
HAPS30 and HAPS31
The conversion from “standard altitude” pressure switch as-
sembly (as shipped from the factory) to “high altitude” pres-
sure switch assembly requires:
• Removing standard altitude pressure switch
• Installing high altitude pressure switch
Before proceeding, shut OFF gas supply at manual shut-off
and turn OFF power to the unit.