Reznor FT Unit Installation Manual - Manual (Page 12)

Form RZ-NA-I-FT, Mfg No. 173473 Rev 8, Page 11
3. With the manual valve positioned to prevent flow to the main burn-
ers, connect a manometer to the 1/8” pipe outlet pressure tap in the
valve. Use a water column manometer that is readable to the near-
est tenth of an inch.
4. Remove the cap from the pressure adjusting screw and adjust the
manifold pressure to the pressure setting selected from the table.
Cycle the main burners once or twice to properly seat the adjust-
ment spring in the valve.
Re-check the pressure. If necessary, re-adjust the pressure. When
the pressure is correct, remove the manometer and replace the cap.
Check for leaks at the pressure tap fitting.
5. With the heater operating determine that the inlet pressure to the
heater for natural gas is between 5 and 13.5 in. w.c. and for propane
between 10 and 13.5 in. w.c. Take this reading as close as possible
to heater (Most heaters are now equipped with gas valves that have
an inlet pressure tap.) If the inlet pressure is not within the speci-
fied range, the inlet pressure must be corrected and Steps 3 and 4
repeated.
6. If altitude is above 6000 ft (1830M), verify that the pressure switch
has been changed.
High Altitude Combustion Air Pressure Switches
FT
P/N Description
30 164674 Blue Label, -.10", #PPS10027-2733
45-60 164675 Brown Label, -.17", #PPS10027-2734
75-200 149879 Orange Label, -.50", #PPS10027-2355
250-300 151372 White Label, -.74", #PPS10027-2406
7. Find the Manifold Pressure Adjustment label in the plastic bag that
contained these instructions. Using a permanent marker, fill-in the
pressure setting. Adhere the label on the heater near the gas valve
so that it is conspicuous to someone servicing the valve.
13. Electrical Supply and
Connections
All electrical wiring and connections, including electrical grounding
MUST be made in accordance with the National Electric Code ANSI/
NFPA No. 70 (latest edition) or, in Canada, the Canadian Electrical
Code, Part I-C.S.A. Standard C22.1. In addition, the installer should
be aware of any local ordinances or gas company requirements that
might apply.
Figure 9 - Electrical Connections, DIP Switch Settings, and LED Signal Codes on the Integrated Circuit Board in
the Control Compartment
Circuit Board LED Flash Codes
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 Switch Open or Closed
4 Flashes .........
High Limit or Flame Rollout Switch Open
5 Flashes .........
Flame Sensed and Gas Valve Not Energized
Steady On .......
Internal Failure - Replace the Circuit Board
DIP Switch Settings
SW1 Fan Delay
1 2 to Off
OFF OFF 90 seconds
OFF* ON* 120 seconds*
ON OFF 180 seconds
ON ON 240 seconds
*Standard factory setting.
DIP Switch for
Regulating Fan Off
Delay Time
Check the rating plate on the heater for the supply voltage and current
requirements. A dedicated line voltage supply with fused disconnect
switch should be run directly from the main electrical panel to the heater.
All external wiring must be within approved conduit and have a mini-
mum temperature rise of 60°C . Conduit from the disconnect switch
must be run so as not to interfere with the service panels of the heater.
The electrical supply and control wiring enter at the rear of the heater
and connect to the integrated circuit board. The 115 volt supply wiring
connects to pigtails on the lower portion of the circuit board. The ter-
minal strip for 24 volt thermostat connections is located on the upper
portion of the circuit board. See Figure 9.
CAUTION: Route the wires so that they do not
contact the flue wrapper or venter housing.
Consult the wiring diagram supplied with your heater. A typical wiring
diagram is on page 12.
CAUTION: If any of the original wire as supplied
with the appliance must be replaced, it must be
replaced with wiring material having a temperature
rating of at least 105°C, except for limit control and
sensor lead wires which must be 150°C. See Hazard
Levels, page 1.
14. Thermostat and Connections
A thermostat is not standard equipment but is an installation require-
ment. Use either an optional thermostat available with the heater or a
field-supplied 24-volt thermostat. Install according to the thermostat
manufacturer's instructions, paying particular attention to the require-
ments regarding the location of the thermostat.
Make sure that the heat anticipator setting on the thermostat is 0.6
amps (or in accordance with the amperage value noted on the wiring
diagram of your heater).
15. Fan Motor
The fan motor is equipped with thermal overload protection of the au-
tomatic reset type. Should the motor refuse to run, it may be because of
improper current characteristics. Make certain that the correct voltage
is available at the motor.
Ignitor
Connection
Line Voltage
Connection
24-volt Terminal
Strip for
Thermostat
Connections (refer
to wiring diagram)
LED Signal