Summary of Contents for Temspec VHW Series
- Page 1 Operation & Maintenance Manual VHW Geothermal/Water Source Heat Pump IMPORTANT: Read and save this manual for future reference. This manual is to be left with the equipment owner Form SC-OM-MANUAL ©2005 Temspec Incorporated...
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Page 2: Table Of Contents
Table of Contents INTRODUCTION About the Water Source/Geothermal Heat Pump .............. 1 Nomenclature for Heat Pumps ................... 1 TYPICAL UNIT LAYOUT Model VHW 36/48/60 (ducted) ................... 2 OPERATION Sequence of Operation ..................... 3 Hot Water Circuit ........................ 4 Water Side Circuit ......................5 Refrigeration Circuit...................... -
Page 3: Introduction
INTRODUCTION ABOUT THE HEAT PUMP The Temspec water source/geothermal heat pump (WSHP/GHP) was designed as a means for providing energy efficient self-contained 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 VHW 36, VHW 48, VHW 60 (ducted configuration) SA = Supply Air VA = Ventilation Air ECA = Economizer Air RA = Return Air EA = Exhaust Air ITEM NO. DESCRIPTION ITEM NO. DESCRIPTION ITEM NO. DESCRIPTION Supply Air Fan (s) Return Air Damper and Actuator Heat Exchanger... -
Page 5: Operation
OPERATION Typical Modes of Operation The following are typical modes of operation for a classroom unit ventilator. Please refer to the manual provided by the controls contractor for a more specific controls sequence. 1. Unoccupied Mode During the “unoccupied heat” mode (night set-back) space temperature is maintained by a signal from the thermostat/controller to either the modulating control valve or electric coil. -
Page 6: Hot Water Circuit
Hot Water Circuit The following are typical auxiliary hot water piping schematic for a heat pump. Please refer to the shop drawings for a more specific layout. Hot Water with 2-Way Control Valve ITEM NO. DESCRIPTION ITEM NO. DESCRIPTION Hot Water Coil Actuator - Modulating Manual Air Vent Balance Valve / Ball Valve / Union... -
Page 7: Waterside Circuit
Waterside Circuit The following is a typical geothermal/water source heat pump waterside schematic. ITEM NO. DESCRIPTION Heat Exchanger with Bi-Directional Receiver Valve - 2 Way - ON/OFF Valve - Balance Strainer / Ball Valve / Union Circulator Pump (Optional) -
Page 8: Refrigeration Circuit
Refrigeration Circuit The following is typical geothermal / water source heat pump refrigeration schematic. ITEM NO. QTY DESCRIPTION ITEM NO. DESCRIPTION Compressor - R410A Sensor - Hi Pressure - NC Crankcase heater Sensor - Low Pressure Ref - NO Tee - Copper Controller - Anti-Ice Valve - Reversing - 4 Way - R410A Coil - DX... -
Page 9: Electrical Circuit
100% Powered Exhaust (optional) Internal powered exhaust is an optional feature that may be provided with the VHW series. This feature comes with a spring return actuated aluminum damper, direct drive fan and ECM motor. It shall operate in tandem with the outdoor air damper to be able to provide up... -
Page 10: 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 Phillips (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 11: Changing The Filters
The outdoor and indoor conditions of your area will determine the frequency of filter changes. Temspec recommends that the filters be changed every 3 months as a rule-of- thumb. Note that dirty filters adversely affect the overall performance of the unit. -
Page 12: Cleaning The Evaporator Coil
WARNING: Do NOT use chlorine based cleaners or anti-fungal treatments on the aluminum fins of any coil. Motors Temspec provides motors that are permanently lubricated. No maintenance is required. Cleaning the Energy Recovery Wheel CAUTION: Disconnect power before servicing the unit. -
Page 13: 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) ●... -
Page 14: 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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