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Phason
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
11140706
FHC-1D user manual
1
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Table of Contents
Related Manuals for Phason FHC-1D
Summary of Contents for Phason FHC-1D
- Page 1 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.
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Page 2: Electrical Ratings
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. A × B Fans... - Page 3 FHC-1D user manual 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.
- Page 4 FHC-1D user manual Phason Wiring the FHC-1D 1. Set the voltage switch to the correct position for the line voltage used (120 or 230 VAC). 2. Set jumper to the correct position for the temperature units, Fahrenheit or Celsius, you want to use.
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Page 5: Connecting The Temperature Probe
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. - Page 6 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.
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Page 7: Getting Started
Phason FHC-1D user manual 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. - Page 8 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.
- Page 9 Phason FHC-1D user manual 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.
- Page 10 FHC-1D user manual Phason Adjusting minimum ventilation in IDLE SET mode 1. Turn the knob fully counter-clockwise. Idle Speed 2. Click the front cover switch to the right and hold while turning the knob fully Temperature clockwise and then release the switch. The fan should be running at IDLE.
- Page 11 Phason FHC-1D user manual Adjusting the temperature differential (DIFF): DIFF is the number of degrees Celsius or Fahrenheit above the TEMP SET that the fan reaches maximum speed. For example, if the TEMP SET is 80°F and the DIFF is 6°F, the fan will increase from IDLE at 80°F to maximum speed at 86°F.
- Page 12 FHC-1D user manual Phason 5. Calculate the correction using the following formula. Correction = 10°F ÷ ( – Example 3 For a T1 temperature of 75°F and a T2 temperature of 82°F, the correction is 1.43. 10°F ÷ (82°F-75°F) = 1.43 If the desired differential is 5°F, the actual differential can be calculated as follows: 5°F ×...
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Page 13: Operation Description
Phason FHC-1D user manual Operation description Example 1, operation in off set-back (OSB) mode TEMP SET DIFF IDLE 80°F 6°F 5°F 1. The fan will be off and the heater interlock will be on when the temperature is below 75°F. - Page 14 FHC-1D user manual Phason Example 2, control operation in IDLE SET mode TEMP SET DIFF IDLE 80°F 6°F 1. Below 78°F the heater interlock will be on. 2. The fan operates at IDLE (20% of maximum ventilation) when the temperature is below 80°F.
- Page 15 FHC-1D user manual Maintaining the FHC-1D Proper care and maintenance will help your FHC-1D last longer. To prevent damage to the control, perform the following steps after the first two weeks of operation, and once a year after that. 1. Switch off the power to the control.
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Page 16: Limited Warranty
Phason Limited warranty This warranty applies only to the Phason Inc. (Phason) Fan and Heater Control (FHC-1D). If you need warranty service, return the product and original proof of purchase to your dealer. Phason warrants the FHC-1D subject to the following terms and conditions.
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