Royal Appliance Air Furnace Manual De Usuario

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29733 R2  06/01/2003
 
10
The power requirements for the HO-B Series models are: 
120 VAC, 1 
Æ, 60 Hz., 12A. 5-ton models: 120 VAC, 1 Æ, 
60 Hz., 16A. 
 
Accessories requiring 120 VAC power sources such as 
electronic air cleaners and humidifier transformers may 
be powered from the ST9103 EFT. Do not use the direct 
drive motor connections as a power source, since there 
is a high risk of damaging the accessories by exposure to 
high voltage from the auto-generating windings of the 
direct drive motor. 
 
Thermostat wiring connections and air conditioning 
contactor low voltage connections are shown in the wiring 
diagrams. Some micro-electronic thermostats require 
additional controls and wiring. Refer to the thermostat 
manufacturer's instructions. 
 
The thermostat should be located approximately 5 feet 
above the floor, on an inside wall where there is good 
natural air circulation, and where the thermostat will be 
exposed to average room temperatures. Avoid locations 
where the thermostat will be exposed to cold drafts, heat 
from nearby lamps and appliances, exposure to sunlight, 
heat from inside wall stacks, etc. 
 
Normal heat anticipator setting: 0.1 A. For more precise 
adjustment, the heat anticipator may be adjusted to the 
amperage draw of the heating control circuit as 
measured between the "R" and "W" terminals of the 
thermostat. To reduce the risk of damaging the heat 
anticipator, do not measure circuit without first removing 
one of the two wires first. To determine the heating circuit 
amperage draw: 
1.  Disconnect one of the “R” or “W” wires from the 
thermostat terminal. 
2.  Connect an ammeter between the wire and the 
thermostat terminal to which it was attached. 
3. Note the amperage reading when the heating 
contacts are closed. (System switch must be on 
HEAT
” if so equipped. 
4.  Re-connect the thermostat wire. If the thermostat is 
serving a combination heating and air conditioning 
system, pay particular attention to polarity. 
5. When the thermostat is reconnected and re-
plumbed, adjust the heat anticipator setting to match 
the observed amperage reading. 
10.  HUMIDIFIER 
A humidifier is an optional accessory available through 
most heating supplies outlets. Installation should be 
carried out in accordance with the humidifier 
manufacturer's installation instructions. Water or water 
droplets from the humidifier should not be allowed to 
come into contact with the furnace heat exchanger. 
Terminals (115 v) are provided on the ST9103 EFT 
control. Do not use direct drive motor connections as a 
source of power for 120 VAC humidifiers and humidifier 
transformers. 
 
11.  OIL TANK 
Oil storage tanks must be selected and installed in 
compliance with applicable codes; in the United States, 
NFPA 31,  Standard for the Installation of Oil Burning 
Equipment
, Chapter 2. Observe all local codes and by-
laws. And in Canada, CAN/CSA-B139Installation Code 
for Oil Burning Equipment
, Section 6 
 
In general, the oil tank must be properly supported and 
remain stable in both empty and full condition. The oil 
tank must be fitted with vent and supply pipes to the 
outdoors. Refer to the above-mentioned codes for sizing. 
The vent pipe must be no less than 1¼ inches I.P.S., and 
terminate with an appropriate vent cap in a location 
where it will not be blocked. The fill pipe must be no less 
than 2 inches I.P.S., and terminate with an appropriate 
cap in a location where debris will not enter the fill pipe 
during oil delivery. 
 
If located indoors, the tank should normally be in the 
lowest level, (cellar, basement, etc.). It must be equipped 
with a shut-off valve at the tank outlet used for the oil 
supply. The oil tank must be located as to not block the 
furnace / room exit pathway. Observe all clearances 
specified in the above-mentioned codes. 
12.  PIPING INSTALLATION 
In the United States the installation must be in 
accordance with the requirements of NFPA No. 31 and 
local codes and regulations. 
 
In Canada, the entire fuel system should be installed in 
accordance with the requirements of CAN/CSA B139, 
and local regulations. Use only approved fuel oil tanks 
piping, fittings and oil filters. 
 
Ensure that all fittings used in a copper oil line system are 
high quality flare fittings. Do not use compression fittings. 
 
Do not use Teflon tape on any fittings. 
 
Pressurized or gravity feed installations must not exceed 
3 PSIG. Pressures greater than 10 PSIG may cause 
damage to the shaft seal. If the height of the oil stored in 
a tank above the oil burner exceeds 11½ feet, it may be 
necessary to use a pressure-regulating device approved 
for this purpose.