7
240011511 REV. C [05/31/2017]
Chart 1- United Technologies 1158-120 (LRF)
Dip Switch Position
Blower Delay Times
1
2
3
4
On Seconds
Off Minutes
Off
Off
30
On
Off
60
Off
On
90
On
On
120
Off
Off
2
On
Off
3
Off
On
4
On
On
6
13b. Fan Timer Board And Limit Control (LRFV)
[See Figure 3, page 14]
United Technologies 1168-1 ECM tap board has adjustable fan on/
off delay and airflow settings that must be adjusted in accordance
with furnace input rating (nozzle size). Refer to Table A-10 for
ECM blower set-up.
14. Electrical Connections
• Furnace is listed by Canadian Standards Association under
NRTL (North American) Standard.
•
All field wiring shall conform to CAN/CSA C22.1 Canadian
Electrical Code, Part 1, and by local codes, where they
prevail.
• United States, wiring shall conform to National Fire
Protection Association NFPA-70, National Electrical Code, and
with local codes and regulations.
• Wire furnace to separate dedicated circuit in main electrical
panel.
• Suitably located circuit breaker can be used as service
switch, separate service switch is advisable.
• Service switch is necessary if circuit breaker is close to the
furnace, or furnace is located between circuit breaker and
entry to furnace room.
• Clearly mark service switch. Install in accessible area
between furnace and furnace room entry. Locate so as
to reduce possibility it can be mistaken as light switch or
similar device.
• Power requirement for all LRF models is: 120 VAC, 1 Ø, 60
Hz., 12A.
• Accessory equipment such as electronic air cleaners and
humidifiers may be included on furnace circuit.
• Limit control is thermally operated and automatically
resets. Limit control is factory installed, pre-set and is not
adjustable.
• If limit control opens with United Technologies 1158-120
electronic fan control, circulating fan will energize. When
limit closes, fan off timer begins. At the end of fan off time
cycle burner is energized, initiating normal burner cycle.
• Accessories requiring 120 VAC power sources such as
electronic air cleaners and humidifier transformers may be
powered from electronic
fan timer board where provisions
have been made for connections, but should have their own
controls.
• Do not use direct drive motor connections as a power
source, there is risk of damaging accessories.
• Thermostat wiring connections are shown in wiring
diagrams in Appendix B. Some micro-electronic thermostats
require additional controls and wiring. Refer to thermostat
manufacturer's instructions.
• ECM Blower note
- Single stage cooling use terminal Y/Y2.
Two stage cooling use terminal Y1 for first stage and Y/Y2
for second stage. When Y1 is energized, air flow is reduced
by 20%. Do not use terminal Y1 with single stage cooling or
heat pump.
•
Locate thermostat approximately 5 feet above floor, on
inside wall, and where thermostat is exposed to average
room temperatures. Avoid locations where thermostat
is exposed to cold drafts, heat from nearby lamps and
appliances, exposure to sunlight, heat from inside wall
stacks, etc.
• Adjust thermostat heat anticipator to amperage draw of
heating control circuit as measured at "R" and "W" terminals
of thermostat. Do not measure current with thermostat
connected to the circuit. Measure amperage by connecting
ammeter between two wires which connect to thermostat
"R" and "W" terminals.
15. Humidifier
•
Humidifier is optional accessory available through most
heating supplies outlets.
•
Follow humidifier manufacturer's installation instructions
• Protect furnace heat exchanger from water or water droplets
from humidifier.
• Do not use direct drive motor connections as source of
power for 120 VAC humidifiers and humidifier transformers.
16. Piping Installation
• Install fuel system in accordance with requirements of CAN/
CSA B-139, and local regulations.
• United States installation shall conform to NFPA No. 31 and
local codes and authorities.
•
Use only approved fuel oil tanks, piping, fittings and oil filter.
•
Install oil filter as close to burner as possible.
• Refer to instructions and illustrations in oil burner and oil
pump instructions shipped with the furnace.
17. Oil Filter
Install oil filter between fuel oil storage tank and oil burner. When
using oil burner nozzle smaller than 0.65 U.S. Gallons Per Hour,
install additional 7 to 10 micron filter as close as possible to oil
burner.
