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Page 20
The ignition control contains a green LED which indicates
the following:
TABLE 5
IGNITION CONTROL LED
LED
UNIT OPERA TION
Slow Flash*
Normal Operation - No call for heat
Fast Flash
Normal Operation - Call for heat
2 Flashes
System lockout - failed to detect or sustain flame
3 Flashes
Pressure sw itch failed closed before CAI
is energized or failed open after CAI is
energized
4 Flashes
High limit (S10) or rollout sw itch open
5 Flashes
Flame sensed and gas valve (GV1) not energized
6 Flashes
On-board microprocessor fault.
7 Flashes
Pressure sw itch (S18) closed w ith inducer off.
8 Flashes
Rollout sw itch (S47/S195) open. Cycle-pow er to reset.
Steady On
Control board (A3) failure
Steady Off
Internal control board (A3) failture or not pow er.
In Canada, certification for installation at altitudes
over 4500 feet (1372m) above sea level is the
jurisdiction of local authorities. ADP recommends
derating 4%/1000 feet above 4,500 feet. Refer to
table 6 for natural gas manifold pressures and the
Engineering Handbook for high altitude kit part
numbers.
Units may be fired at full input up to 2000 feet.
(610m) above sea level. Above 2000 feet (610m),
manifold pressure must be adjusted. Adjust pressure
regulator
to
pressure
shown
in
table
6.
In the US, units may be fired at full input up to 2000 feet
(610m) above sea level. Above 2000 feet (610m), unit
must be de-rated by four percent per 1000 feet for instal-
lation above 2000 feet. The de-rate may be accomplished
by adjusting the manifold pressure. See table 7. See the
Engineering Handbook for high altitude kit part numbers.
TABLE 7
TABLE 6
In some cases, it is necessary to change the pressure switch to
ensure proper operation at higher altitudes. See EHB for high
altitude pressure switch kits.
The combustion air inducer proving switch is factory set.
No adjustment is necessary.
To check for proper gas flow to the combustion chamber,
determine the Btu input from the appliance rating plate. Di-
vide this input rating by the Btu per cubic feet of available
gas. Result is the required number of cubic feet per hour.
Determine the flow of gas through the gas meter for two
minutes and multiply by 30 to get the hourly flow of gas.
1 - Check gas line pressure with unit firing at maximum
rate. A minimum of the following should be
maintained for proper unit operation:
030-105KBTUH -
5” (127mm) w.c. for natural gas
125-400KBTUH -
6” (152mm) w.c. for natural gas
030-105KBTUH -
10.5” (267mm) w.c. for LP/propane gas
125-400KBTUH -
11.0” (279mm) w.c. for LP/propane gas
Ignition Control LED
High Altitude Adjustments
Gas Flow
Gas Pressure Adjustment
Содержание UH Series
Страница 3: ...Page 3 UHRS COMPACT UNIT HEATER PARTS ARRANGEM ENT 030 105K BTUH TRANSFORMER ...
Страница 6: ...Page 6 UHCM STANDARD UNIT HEATER PARTS ARRANGEMENT 125 400K BTUH ...
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