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Summary of Contents for Temspec VHC Series
- Page 1 Operation & Maintenance Manual VHC & VLC Series Unit Ventilator IMPORTANT: Read and save this manual for future reference. This manual is to be left with the equipment owner Form SC-OM-MANUAL rev 3 – 2019-06-12 ©2005 Temspec Incorporated...
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Page 2: Table Of Contents
Table Of Contents INTRODUCTION About the Unit Ventilator ….……………………………………………………………………1 Nomenclature for Unit Ventilators with Self-Contained Cooling ….……………………1 TYPICAL UNIT LAYOUT Model VLC 24, VLC 30, VLC 36 .………………………………………………………………2 Model VLC 48, VLC 60 - (ducted) ….……………………………………………………………3 Model VLC 48, VLC 60 - (freeblow) .………………………………………………………4 Model VHC 30, VHC 36, VHC 48, VHC 60 .………………………………………………5... -
Page 3: Introduction
INTRODUCTION ABOUT THE UNIT VENTILATOR The Temspec unit ventilator was designed as a means for providing heating, cooling and ventilation to the classroom. Our goal is to help create an enhanced learning environment by focusing on the following points when designing our equipment: •... -
Page 4: Typical Unit Layout
TYPICAL LAYOUT Models VLC 24, VLC 30, VLC36 S.A. Duct By E.A. Others E.A. S.A. S.A. S.A. 93" O.A. R.A. C.A. C.E. 23" 33" SIDE SECTION FRONT ELEVATION S.A. Supply Air O.A. Outdoor Air C.E. Condenser Exhaust Air R.A. Return Air C.A. -
Page 5: Model Vlc 48, Vlc 60 - (Ducted)
TYPICAL LAYOUT Models VLC 48, VLC 60 (ducted configuration) S.A. Duct By Others E.A. E.A. 93" O.A. C.A. R.A. C.E. 30" 44" SIDE SECTION FRONT ELEVATION S.A. Supply Air O.A. Outdoor Air C.E. Condenser Exhaust Air R.A. Return Air C.A. Condenser Air E.A. -
Page 6: Model Vlc 48, Vlc 60 - (Freeblow)
TYPICAL LAYOUT Models VLC 48, VLC 60 (freeblow configuration) S.A. S.A. S.A. 93" O.A. C.A. R.A. C.E. 30" 44" SIDE SECTION FRONT ELEVATION S.A. Supply Air O.A. Outdoor Air C.E. Condenser Exhaust Air Return Air R.A. C.A. Condenser Air 11. Return air damper. 1. -
Page 7: Model Vhc 30, Vhc 36, Vhc 48, Vhc 60
TYPICAL LAYOUT Models VHC 30, VHC 36, VHC 48, VHC 60 (ducted configuration) S.A. S.A. O.A. C.A. 93" C.E. / E.A. E.A. R.A. / E.A. 30" 44" SIDE SECTION FRONT ELEVATION S.A. Supply Air O.A. Outdoor Air C.E. Condenser Exhaust Air R.A. -
Page 8: Operation
6. Humidistat & Hot Gas Reheat (Optional for VHC series units only) A room humidistat sensor is included in the return air stream. The humidistat has a set point of 55% R.H. -
Page 9: Hot Water Circuit
Hot Water Circuit The following are typical hot water piping schematics for a unit ventilator. Please refer to the unit ventilator shop drawings for a more specific layout. Hot Water With 2-way Control Valve Balancing Valve 2-way Control Valve Manual Air Vent Isolation Valve MIXED WATER... -
Page 10: Refrigeration Circuit
Refrigeration Circuit The following is a typical self-contained refrigeration circuit. Anti-Ice Control Distributor Metering Device MIXED Filter Dryer EVAPORATOR COIL Sight Glass, Moisture Indicator High Limit Pressure Cut-Out Pressure Test Port Low Limit Pressure Cut-Out OUTDOOR Compressor CONDENSER COIL Crankcase Heater... -
Page 11: Electrical Circuit
Powered Exhaust (optional) Internal powered exhaust is an optional feature that is provided with the VHC series. This feature comes with a spring return damper actuator that is separate from the one used to control the outside air and return air dampers. However, the powered exhaust damper actuator is electrically linked to the outside air damper. -
Page 12: Maintenance
MAINTENANCE Servicing The Unit Maintenance to the unit is accomplished by removing the front access panels. Typically, the panels are secured by heavy duty Philips (star or cross shape) head screws. When removing the access panel, loosen but do not remove the screws. Carefully store the panel in a place where it will not get damaged. -
Page 13: Changing The Filters
On the VLC series units, simply slide out the old filters and replace them with the new ones. On the VHC series units, unclip the filters. Be sure to note the airflow direction that is marked on the filter(s). -
Page 14: Cleaning The Evaporator Coil
Motors Temspec provides motors that are permanently lubricated. No maintenance is required. Caution: Temspec does not recommend the use of a unit ventilators during construction/drywall installation as a space heater or air conditioner. Motor exposure to drywall dust can reduce motor life and leads to premature failure. -
Page 15: Troubleshooting
TROUBLESHOOTING Basic Trouble Shooting Guidelines Problem Action Required ●Supply fan not running ●Verify that the disconnect is in the “on” position ●Verify that door micro-switch “kill switch” is completely depressed and operating correctly ●Verify that thermostat / controller is not in unoccupied mode (night set-back) ●Check manual reset controls (electric heat, high refrigerant pressure controls and low limit... -
Page 16: Replacement Parts
REPLACEMENT PARTS Limited Warranty TEMSPEC INCORPORATED warrants the equipment from factory defects in material or workmanship for a period of one year. For this warranty to be valid, the unit(s) must be installed and maintained in accordance with the manufacturer’s printed instructions.
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