Phason FHC-1D User manual

Phason FHC-1D user manual
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FHC-1D user manual
The Fan and Heater Control (FHC-1D) automatically controls the temperature in a room by
adjusting the speed of variable speed fans and controlling a heater interlock.
When the temperature is at the set point, the FHC-1D operates the fans at the idle speed setting and
the heater is off. When the temperature exceeds the set point, the FHC-1D increases the speed of
the fans. When the temperature drops below the set point, the FHC-1D shuts off the fans (in shut-
off mode) or operates the fans at idle speed (idle mode) and switches on the heater or heat lamps.
Features
One variable speed output
One heater interlock output
Automatic shut-off and idle modes
Adjustable off set-back for shut-off mode
Adjustable idle speed for idle mode
Adjustable temperature set point
Adjustable temperature differential
Three-second full-power-turn-on to
minimize fan ice-up
Two-digit LED display
Fahrenheit and Celsius display
Error code display for troubleshooting
Overload protection fuse
Six-foot temperature probe, extendable to 500 feet
Rugged enclosure (corrosion resistant, water resistant, and fire retardant)
CSA approval
Two-year limited warranty

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Electrical ratings
Input: 120/230 VAC, 50/60 Hz
Variable stage: 10 A at 120/230 VAC, general-purpose (resistive)
7 FLA at 120/230 VAC, PSC motor
1/2 HP at 120 VAC, 1 HP at 230 VAC, PSC motor
Variable stage fuse: 15 A, 250 VAC ABC-type ceramic
Relay: 10 A at 120/230 VAC, general-purpose (resistive)
1/3 HP at 120 VAC, 1/2 HP at 230 VAC
360 W tungsten at 120 VAC
The FLA (full load ampere) rating accounts for the increase in motor current draw
when the motor operates at less than full speed. Make sure the motor/equipment
connected to the variable stage does not draw more than 7 FLA.
Fill out the information below to help configure your control and verify that you do not exceed the
electrical ratings of the FHC-1D.
Fans A
Maximum current draw per fan
B
Number of fans
A × B
Total current draw
Make
Model
Voltage rating
Power factor
Heater or furnace Maximum current draw Voltage rating
Make
Model

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Installing the FHC-1D
The FHC-1D must be installed by a qualified electrician.
Before installing or servicing the FHC-1D, switch OFF the power at the source.
Install the FHC-1D according to local electrical codes.
Mount the enclosures on a sheltered,
vertical surface, with the electrical
knockouts facing down.
Use a screwdriver to tighten the screws
in the enclosures. Do not use a drill or
over tighten the screws; this can crack
the enclosures and ruin the watertight
seal.
Use the electrical knockouts for bringing wires or cables into or out
of the enclosures. Use watertight strain reliefs or conduit
connectors at all cable-entry points.
Do not make additional holes in the enclosures; this can damage
the watertight seal or control components and void the warranty.
When connecting electric heaters or brooder lamps and a furnace to the FHC-1D,
remember that operation voltages might be different. This could damage the
equipment.
Only permanent split capacitor motors appropriate for variable speed control, or shaded
pole motors, can be used on the variable stages.
Mounting the FHC-1D
1. Remove the cover from the enclosure.
2. Fasten the FHC-1D to the mounting surface using the fours screws provided.

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Wiring the FHC-1D
1. Set the voltage switch Ato the correct position for the line voltage used (120 or 230 VAC).
2. Set jumper Dto the correct position for the temperature units, Fahrenheit or Celsius, you want
to use.
3. Connect the wires as shown below.
Connecting equipment to the heater interlock
The heater interlock output is a normally-open relay contact that switches a heater or furnace ON or
OFF. The relay contacts close when the temperature is 2°F below the TEMP SET.
Connect the wires as shown in the following diagram. Use power contactors (not supplied) for
electric heat or heat lamps. Connect directly for most gas furnaces.

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Connecting the temperature probe
Follow the guidelines below and connect the temperature probe as shown in the diagram on page 4.
Do not run the probe cable in the same conduit as AC power cables
Do not run the sensor cable beside AC power cables or near electrical equipment.
When crossing other cables or power lines, cross them at a 90 degree angle.
Using four-zone averaging
The FHC-1D can monitor the temperature in four
different zones. The control takes an average of the
four temperatures and operates according to the
average temperature.
To use four-zone averaging, you must connect four
temperature probes to the unit, as shown to the right.

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Extending temperature probe cables
You can extend temperature probe cables to lengths of up to 500 feet. Follow the guidelines below
and on page 5 when extending cables.
Use two-wire 18 AWG jacketed cable. Phason recommends Belden # 9408, Alpha # 5052, or an
equivalent. Extension cable is also available from Phason. For more information, contact your
dealer or Phason.
Join the extension cable to the temperature probe cable as shown on the next page.
If the unit operates erratically with the extended probe, run the cable along a different path or
shorten it.
To extend probe cables
C
A
A
C
E
D
F
ASlide three pieces of heat shrink tubing over the wires: one for the red wire, one for the black
wire, and one for both.
BStrip the ends of the wires and then twist them together.
CSolder the wires together using rosin-core flux solder—DO NOT use acid core solder.
DSlide the heat shrink tubing over the solder joints.
EShrink the tubing using a heat gun.
FYour connection should look like this.

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Getting started
When power is applied to the FHC-1D, the following will be displayed:
1. 88 will be displayed for approximately 0.25 seconds (start-up).
2. 00 will be displayed for approximately one second (self-test).
3. 60 will be displayed for approximately one second. 60 indicates that the power system is 60Hz.
4. The display will alternately flash between the temperature and PF. This indicates a power
interruption or start-up has occurred.
5. To clear the PF, click the switch to the right.
The control is now in ‘normal’ mode.
Display alerts
Alert Description
PS The temperature probe or sensor cable has short circuited.
PD The temperature probe is damaged or the connecting wire is broken.
tS
The Temperature knob has accidentally been turned. The display will alternately flash
tS and the ambient temperature. The control will not accept the new setting until the
switch is clicked to the set position.
or
The voltage switch is set to 230 volts, but the incoming power is 120 volts. Check the
voltage switch.
PF
The power has been interrupted. The display will flash between PF and the
temperature. To clear the alarm, click the switch to the right. The control will function
normally.

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Displaying and adjusting parameters
Switch position Function
Displays the ambient temperature
Allows you to view and adjust the temperature set point
Clears alarms
Allows you to view and adjust the differential (di), off set-back (oS),
and idle speed (id). Each time the switch is clicked and held in this
position, the next parameter is displayed. The display flashes between
the parameter code (two letters) and it's setting (two digits). You can
adjust the parameter at this point. The cycle starts over after the last
parameter. To restart at the beginning of the cycle, click the switch to
the right.
Parameter Code Range Factory setting Location
Temperature set point N/A 32 to 99°F (0 to 38°C) N/A External knob
Idle speed id 0 - 99% N/A External knob
Temperature differential di 1 to 20°F (0.6 to 12°C) 6°F Internal trimmer
Off set-back oS 0 to 16°F (0 to 9°C) 5°F Internal trimmer
°F or °C (ambient temp.) °F/ °C-22 to 99°F (-30 to 38°C) °F Internal jumper
Changing the temperature display units
The °F/°C jumper lets you select whether the FHC-1D displays temperatures in degrees Fahrenheit
or Celsius. To change the setting, position the jumper as shown in section D on page 4.
About the hysteresis
The FHC-1D has a 1°F (0.5°C) hysteresis. This means the fan will turn off 1°F below the point it
turned on.
For example, if TEMP SET is 75°F, the fan will turn on at 75°F, off at 74°F. This prevents the fan
from flickering on and off at the TEMP SET.

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Off set-back/IDLE SET Mode (OSB)
OSB is the number of degrees Celsius or Fahrenheit below the TEMP SET that the fan will switch
between OFF and IDLE. IDLE mode provides minimum ventilation at temperatures below the
TEMP SET. For more information, see Example 1, operation in off set-back (OSB) mode on page
13.
To display and adjust OSB
1. Click the switch to the right to start at the beginning of the parameter list.
2. Click the switch to the left two times and then hold. The display flashes between oS and the
setting. If id is displayed, the control is in IDLE SET mode.
3. Use a small flat screwdriver to adjust the internal trimmer to the desired OSB or turn the
trimmer fully clockwise to put the control into IDLE SET mode. See section C of the diagram
on page 4 for trimmer location.
Adjusting minimum ventilation in OSB mode
There must be a temperature probe connected before adjusting the minimum ventilation.
1. Turn the Idle Speed knob fully counter-clockwise and then back ¼-turn clockwise.
2. Click the front cover switch to the right and hold while turning the Temperature knob fully
clockwise and then release the switch. The fan should not be running
3. Click the front cover switch to the right and hold while slowly turning the Temperature knob
counter-clockwise. When the fan runs full speed, release the front cover switch and the
Temperature knob.
The fan runs at maximum speed for approximately three seconds, and then at IDLE. The
Temperature knob should be approximately one °F higher than the temperature.
4. Slowly adjust the Idle Speed knob until a satisfactory IDLE has been reached. A voltmeter is
helpful for determining the voltage. If you are unsure, see your fan dealer for the minimum idle
voltage for your fan motor.
5. Click the front cover switch to the right and adjust the Temperature knob to the desired
temperature.
6. Release the switch.

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Adjusting minimum ventilation in IDLE SET mode
1. Turn the Idle Speed knob fully counter-clockwise.
2. Click the front cover switch to the right and hold while turning the Temperature knob fully
clockwise and then release the switch. The fan should be running at IDLE.
3. Slowly adjust the Idle Speed knob until a satisfactory IDLE has been reached. A voltmeter is
helpful for determining the voltage. If you are unsure, see your fan dealer for the minimum idle
voltage for your fan motor.
4. Hold the front cover switch to the right and then adjust the Temperature knob to the desired
temperature.
5. Release the switch.
Adjusting the idle speed (IDLE)
The IDLE is the speed of the fan in IDLE SET mode. In other words, minimum ventilation. IDLE
is displayed as a percentage of maximum speed. For more information, see Operation description
on page 13.
To display and adjust IDLE
1. Click the switch to the right to start at the beginning of the parameter list.
2. Click the switch to the left four times and hold.
The display alternately flashes between id and the setting.
3. Adjust the Idle Speed knob on the front cover to the desired fan speed.
4. Release the switch
Adjusting the temperature set point (TEMP SET)
TEMP SET is the desired temperature. It is also the reference for the off set-back (OSB) and
temperature differential (DIFF) settings.
To display and adjust TEMP SET
1. Hold the switch in the set (right) position.
2. Adjust the Temperature knob to the desired setting.
You must hold the switch in the set position while turning the Temperature knob. If
this is not done correctly, the display will flash between tS and the temperature
display, indicating the knob has accidentally been turned. The control will not accept
the new setting until the switch is clicked to the right.