Therma-Stor Products Group HI-E Dry Vehere User's Manual
Contents
1. The Vehere features a cabinet mounted or remotely located control easy roll casters and the highest dehumidification capacity available in it s class HI E Dry Vehere PN 4025276 Reliability Our compact design uses less refrigerant which reduces our cost and improves reliability The Vehere s HI Efficiency operation can save thousands of dollars annually Comfort The Vehere provides airflows up to 540 CFM cubic feet minute of Dry Air This airflow helps reduce foggy windows mold mildew and condensate all reduced to increase indoor occupant comfort Specifications subject to change without notice Revised 10 06 Toll Free 1 800 533 7533 1 www thermastor com sales thermastor com Table of Contents 1 Intended Application for Vehere ccccceeeeee ees 1 2 Specifications amp Capacities ccccecececeeeeeeee 1 2 1 Vehere Diagram ccccsscseeseceeesssetensseeenesenenes 2 Se INStallatiONes 22c2c205 ci po ccded aa an Eiaa 2 SAL LOCATON isena arii ar a ea 2 3 1A Improper Installation ccccecceeeeeeeeees 2 3 1B In humid area no ducting c eee ceee eens 3 3 1C In humid area duct inlet and or outlet 4 3 1D In remote area duct inlet amp outlet 4 3 2 Mounting the Humidity Sensor Controller 5 3 3 Electrical Requirements ccccececeeeeeeeeeeeees 5 3 4 Condensate REMOVAl ccccceeeeeeeeeeeeeeeeeeeee2. OF USE OR DAMAGE TO ANY REAL OR PERSONAL PROPERTY Some states do not allow limitations on how long an implied warranty lasts and some do not allow the exclusion or limitation of incidental or consequential damages so one or both of these limitations may not apply to you Legal Rights This warranty gives you specific legal rights and you may also have other rights which vary from state to state Toll Free 1 800 533 7533 11 www thermastor com sales thermastor com
3. X 1 for Front Cover Relay SPDT 24 Volt Self Retaining Nut 14 20 Service Valve Assembly w Core amp Cap Switch SPDT On Off for Fan Accumulator Wiring Diagram NS 24 Volt Transformer PPRPRROPRPORRPRPRERENBRBRBRBBRPRPBRANE EB Toll Free 1 800 533 7533 10 www thermastor com sales thermastor com HI E DRY Vehere Dehumidifier Limited Warranty Warrantor Therma Stor LLC PO Box 8680 Madison WI 53708 Telephone 1 800 533 7533 Warranty This warranty covers the HI E Dry Vehere Year One 100 parts and labor all components Year s Two through Five The condenser evaporator and compressor of the HI E Dry Vehere will operate free of any defects in material or will repair or replace the defective part s If a defect in materials or workmanship occurs within the warranty period Therma Stor LLC will repair or replace the defect User Responsibilities Warranty service must be performed by a servicer authorized by Therma Stor LLC To obtain warranty service you must obtain a return material authorization RMA To obtain an RMA you must present proof of purchase or lease by use of a warranty card original sales receipt or other reasonable and reliable means To obtain an RMA call Therma Stor LLC at the above number and ask for the Therma Stor LLC Service Department which will then issue an RMA and arrange for at our option either repair or replacement Freight Freight to and from the servicer is
4. qualified service people should service this unit 7 1 Technical Description The Vehere uses a refrigeration system to remove heat and moisture from incoming air and add heat to the air it discharges Hot high pressure refrigerant gas is routed from the compressor to the condenser coil The refrigerant is cooled and condensed by giving up its heat to the air it discharges from the unit The refrigerant liquid then passes through two capillary tubes which cause the refrigerant pressure and temperature to drop It next enters the evaporator coil where it absorbs heat from the incoming air and evaporates Toll Free 1 800 533 7533 The evaporator operates in a flooded condition which means it should always be full of liquid refrigerant during normal operation A flooded evaporator should maintain constant pressure and temperature across the entire coil from inlet to outlet A mixture of gas and liquid refrigerant enter the accumulator after leaving the evaporator coil The accumulator prevents any liquid refrigerant from reaching the compressor The compressor removes the cool refrigerant gas from the accumulator and compresses it to a high pressure and temperature to repeat the process 7 2 Troubleshooting No dehumidification neither blower nor compressor run with fan switch OFF 1 Unit unplugged or no power to outlet 2 Humidity control set too high or defective 3 Loose connection in internal wiring 4 Open low pressure c
5. HI E Dry Vehere Therma Stor uc Part Number 4025276 Owner s Manual HI E Dry Vehere Installation Operation amp Service Instructions Read and Save These Instructions The HI E DRY Vehere Pool amp Spa Humidity Controller featuring FOCUS Technology is the industries most efficient durable and economic product for controlling moisture related problems associated with indoor pools whirlpools hot tubs and therapy lap pools Vehere delivers comfort and solves Chemical Odors Foggy Windows Mold amp Mildew High Humidity Level Condensate and Structural Moisture Problems The Vehere with FOCUS Technology is Performance Reliability amp Comfort The Vehere utilizes technology which dramatically improves performance product reliability and comfort Performance The Vehere s innovative heat transfer technology offers our customers HI Efficiency A dehumidifier resulting in a compact refrigeration system requiring less electric consumption This ensures the use of a standard 20 Amp electrical outlet and LOW OPERATING COSTS Hl Capacity Vehere s passive heat transfer process allows the removal of over 192 pounds of water per day 80 F 60 RH That s two three times more water removal per kilowatt hour of electricity than conventional dehumidifiers Compact The Vehere s stainless steel enclosure is corrosion resistant with a built in fan for low noise operation
6. ats E CEM i l for Quiet Vent and A po remote Vehere Vehere Pool amp Spa Humidity Controller 3 1D In Remote Area Duct Inlet amp Outlet It is often desirable to install the Vehere in an adjacent equipment room or unfinished area Air is then transferred between the humid room and the unit via ducting Remotely mount the Vehere humidity control in the humid room and wire to the Vehere Local electrical codes must be followed when wiring the control Refer to the Mounting the Humidity Sensor Controller section which follows See Fig 5 Direct Warm amp Dry Air Toward Window Glass Figure 5 Installation in remote area with ducting Toll Free 1 800 533 7533 www thermastor com sales thermastor com 3 2 Mounting The Remote Humidity Sensor Controller If the Vehere is to be located in a remote location outside the pool or spa area mounting of the humidity sensor in the space to be conditioned is necessary If the humidity sensor is not located in the conditioned space the Vehere will not operate properly IMPORTANT IMPORTANT Locate the humidity element on an inside wall free from drafts out of direct sunlight and where the element is not exposed to excessive vibration Be careful not to drop the unit Mount the wall mount element at a height of 4 to 6 feet 1 2 to 1 8 m above the floor To mount the HI E DRY Vehere dehumidistat on a wall for remo
7. e used to extend it It is commonly available in 10 lengths from building supply plumbing and hardware stores It will slide tightly inside the end of the drain hose If more than one length of pipe is required they can be joined with a short piece cut from the end of the drain hose 3 5 Ducting 3 5A Ducting kit The factory installation kit includes two twelve inch collars to allow ducting to be attached to the inlet and outlet of the Vehere The 12 collar with three tabs can be attached via the holes provided in the front of the unit and the 12 flanged collar can be affixed to the top opening S See Fig 8 Tabbed duct collar Flanged duct collar Figure 8 Tabbed duct collar is installed around the ex haust outlet The flanged duct collar is installed around the intake opening www thermastor com sales thermastor com 3 5B Ducting for Dehumidification Ducting the Vehere as mentioned requires consideration of the following points The Vehere will require a single 12 round or equivalent dedicated return from the pool room The Vehere supply can be dedicated or tapped into a forced air system supply A check damper should be used at the connections The warm dry supply air should be washed over the windows at multiple drops for best results Grills and diffusers or duct ends must not excessively restrict airflow Round flex duct can be purchased by ordering the following part numbers from the facto
8. ees 5 SLO IDUCTING aee eE stance nese saeearamscanane 5 SDA Ducting Kit seinnu 5 3 5B Ducting for Dehumidification cccee 6 4 Operation sisisisseccccisicevescarsendssseaceesdaessacstanenexsesseeac 6 4 1 Humidity Control siccciseseevsidsassacees teavtigescaveiaevinds 6 4 2 Humidity Control Adjustment cceeeeeeeeeeee eee 6 48 Fan SWItG heieri ian i a 6 4 4 Automatic Defrost Control cccceceeeeeeeeeeeeeeee 6 4 5 Automatic Low Pressure Control cccseeeeeeee 6 5 Ventilation cc ccc cece eee ceeceeeeaececeeeeeeeeeaeeeeeeaees 7 5 1 Ventilation Recommendations 0ceeeeeee eee 7 6 Maintenance cccccccececceeeececeeceeeeaeseeeeeeeeeaes 7 GL AIP FIG oscctsincaatassiecnctactanctasinaiaeatandeataasenatinedtined 7 We SSCPVICC T E A E E E E A TT 7 7 1 Technical DESCription ccccceceeceeeeeceeeeeees 7 7 2 TrOUDICSNOOTING cccecceeeeeeeeeeeeeeeeeeeeeeneeseeees 7 7 3 Refrigerant Charging cccccecescceeeeeeeeeeeeeeeeeees 8 7 4 Blower Replacement ccccccceceececeeseceeeeeees 8 7 5 Low Pressure Comt Olisit niuia 8 TO Relay irre eanna E AEE a AEE N tin 8 8 Vehere Accessories 2ccceceeeeeeeeeeeeeeeenesenesenes 8 9 Vehere Electrical Wiring Diagram 00085 9 10 Service Paltsi irei neria dea ii 10 11 Wa rran tV eeina n a N aare 11 Read these installation operation and service instructions careful
9. h voltage circuitry This could present a hazard which could result in death serious bodily injury and or property damage Only qualified service people should service this unit If the refrigerant charge is lost due to service or a leak a new charge must be accurately weighed in If any of the old charge is left in the system it must be removed before weighing in the new charge Refer to the unit nameplate for the correct charge weight and refrigerant type Add the refrigerant through the low side service port See Fig 11 7 4 Blower Replacement The blower has a PSC motor internal thermal overload protection If defective the complete assembly must be replaced 1 Unplug the power cord 2 Remove the cabinet front 3 If an outlet duct is connected to the unit remove it 4 Disconnect the blower leads white from the compressor run capacitor and black connected to the fan switch 5 Remove the nuts amp bolts holding the blower outlet flange to the cabinet end and remove the blower 6 Reassembling with the new blower is the above procedure reversed Toll Free 1 800 533 7533 7 5 Low Pressure Control If the low side refrigerant pressure drops to 15 PSIG the low pressure control opens and shuts off the compressor and blower It is automatically reset It will close when the refrigerant pressure rises to 35 PSIG Its primary function is to prevent damage to the compressor if a leak develops in the refrigeration
10. ku x Loge i l pS y 2 Kees m Sar BLOWER A Sat REMOTE SWITCH 115V contacts CONTROL BLK ORG CONTACTS 4 foul A g XFMR com ORG A BLK wm RED Biase 24V 115V BRN z LO PRESSURE RELAY 8 REMOTE CONTROL COIL BLK N L l 6 a Vo i os vio fa aN OMPRESSOR aS VA BSS SS YEL 7 BLK c S BUN 7 a R CAPACITOR x 7 N OVERLOAD DEFROST lt RED 8 CONTROL Figure 12 Vehere wiring diagram Toll Free 1 800 533 7533 9 www thermastor com sales thermastor com 10 Service Parts ITEM PART NO QTY DESCRIPTION 1 4021083 Blower with Capacitor 2 4022740 Capacitor Run 30MFD 370v 3 4017777 Capillary Tubes 059 ID x 32 long 4 4023604 Caster 2 Plastic Swivel 5 4023533 Coil Condenser 6 4023534 Coil Evaporator 7 4025738 Compressor Service Assembly includes compressor capacitor and overload 4022595 Compressor Overload 8 4022219 Control Low Pressure 9 4025278 Cord amp Wire Harness 10 4021470 Defrost Thermostat 4021648 Defrost Thermostat Mounting Clip 11 4021799 12 4025087 13 4017152 14 4021689 15 4025283 4021495 16 1096010 17 4022484 18 4023549 19 4020988 20 4025560 21 4021818 4023609 4022487 Filter Air 2 X 16 X 16 Grainger P N 6B958 Filter Drier Hose Drain 38 x 20 long Hose Drain Pan 56 ID x 16 long not shown Humidity Controller Cabinet Mounted Knob Machine Screw Stainless Steel 14 20
11. luded 3 1A Improper Installation Do not install the Vehere with the exhaust of the unit within 3 of a wall or obstruction Do not place the unit near open water See Fig 2 Figure 2 Installation clearance requirements 3 1B In Humid Area No Ducting The simplest installation is to place the Vehere in the pool area with no ducting The Vehere must be at least 3 from walls and other air obstructions at the return and supply sides of the Vehere See Figure 3 Figure 3 Installation in humid area with no ducting Toll Free 1 800 533 7533 www thermastor com sales thermastor com Optional Quiet Vent Exhaust Ventilator Low 165 CFM high 290 CFM Vehere Pool amp Spa Humidity Controller Dehumidistats for Quiet Vent and remote Vehere Direct Warm amp Dry Air Toward Window Glass Figure 4 Installation in humid area with ducting 3 1C In Humid Area Duct Inlet and or Outlet If the pool room is very large or has high ceilings dehumidification can be improved by adding an inlet and or outlet duct to circulate and destratify stagnant areas Add inlet or outlet ducting to create flow across the area s greatest length For areas with ceilings higher than 12 use an inlet duct to draw warm moist air from near the ceiling See section 4 5 for attaching duct collars amp ducting See Fig 4 Optional Quiet Vent Exhaust Ventilator Low 165 CFM Aa Dehumidist
12. ly before installing and using this unit Proper adherence to these instructions is essential to obtain maximum benefit from your Vehere pool amp spa humidity controller AWARNING If used near a pool or spa be certain there is NO chance the unit could roll into the water or be splashed and that it is plugged into a GROUND FAULT INTERRUPTER DO NOT use the Vehere as a bench or table Avoid discharging the exhaust directly at people or pets Toll Free 1 800 533 7533 1 Intended Application The intended application for the Vehere is as a pool amp spa area humidity sensing controller applied either as a free standing device directly in the pool area or operated remotely to provide dehumidified air to the pool or spa area using optional ducting and remotely mounting the humidity controller The Vehere high efficiency dehumidifier utilizes refrigeration to cool an incoming air stream below its dewpoint as it passes through an evaporator coil This cooling results in the removal of moisture latent heat The cooled and dried air is used to pre cool the incoming air stream resulting in up to a 200 percent increase in overall efficiency 2 Specifications Model HI E Dry Vehere 4025276 Electrical 110 120 VAC 12 0 Amps grounded 7 power cord included Compressor LRA 64 5 Amps Capacity 184 pints day 80 F 60 RH Air Flow 540 CFM without external ducting 510 CFM 15 IWG external static Refrigerant Cha
13. onditions these exhaust fans may cause the backdrafting of toxic combustion by products which are hazardous to human health and could cause death We strongly recommend using only closed combustion heating appliances 5 1 Ventilation Recommendations Ventilation is an important element of pool and spa dehumidification A negative exhaust pressure ventilation system should be used This ventilation system is operated and installed independently of the Vehere unit and keeps the concentrations of corrosive pool chemicals to a minimum and assists in keeping moisture from penetrating the rest of the structure Ventilation should be sized to all local codes It is best if the ventilation is a net negative in pressure 6 Maintenance 6 1 Air Filter The Vehere is equipped with two 2 thick pleated fabric air filters that must be checked regularly Operating the unit with dirty filters will reduce the humidity controller s capacity and efficiency and may cause the compressor to cycle off and on unnecessarily on the defrost control The filters can generally be vacuumed clean several times before needing replacement Replacement filters can be ordered from the factory 7 Service AWARNING WARNING Only qualified service people should service this unit The Vehere has a high pressure refrigerant system and high voltage circuitry This could present a hazard which could result in death serious bodily injury and or property damage Only
14. ontrol Dehumidification blower runs continuously but compressor only runs sporadically with fan switch OFF Unit is in defrost cycle Defrost thermostat defective or loose Loose connection in compressor circuit Defective compressor overload Defective compressor Defective relay Ooo PaAN P No dehumidification Blower runs but compressor does not with fan switch OFF 1 Bad connection in compressor circuit 2 Defective compressor capacitor 3 Defective compressor overload 4 Defective compressor 5 Defective relay Blower does not run Compressor runs briefly but cycles on amp off 1 Loose connection in blower circuit 2 Obstruction prevents impeller rotation 3 Defective blower Unit removes some water but not as much as expected 1 Air temperature and or humidity have dropped 2 Humidity meter and or thermometer used are out of calibration Unit has entered defrost cycle Air filter dirty Defective defrost thermostat Low refrigerant charge Air leak such as loose cover Defective compressor Restrictive ducting SO C0 0 OT E www thermastor com sales thermastor com Evaporator coil frosted continuously low dehumidifying capacity 1 Defrost thermostat loose or defective 2 Low refrigerant charge 3 Dirty air filters or airflow restricted 7 3 Refrigerant Charging AWARNING WARNING Only qualified service people should service this unit The Vehere has a high pressure refrigerant system and hig
15. rge 2 Ibs 13 oz R 22 Optional Duct Connections 12 round inlet amp outlet Size w o duct collars 36 5 Long x 19 Wide x 40 High Weight 180 Ibs Controller Accuracy 5 RH 72 F Capacities The Vehere is designed to control humidity for indoor pool spa hot tub areas It consists of a controller dehumidifying cooling system filter fan and delivers the following dehumidification capacities Air Temp Relative Humidity Lbs Hour Lbs Day 80 F 80 RH 10 34 248 82 F 60 RH 8 336 200 80 F 60 RH 8 04 193 60 F 80 RH 7 17 172 Air Temp Relative Humidity Pints Hour Pints Day 80 F 80 RH 9 92 238 82 F 60 RH 7 95 191 80 F 60 RH 7 71 184 60 F 80 RH 6 67 160 Air Temp Relative Humidity BTUs Hour KWH Day derived 80 F 80 RH 15313 37 1 82 F 60 RH 13114 35 3 80 F 60 RH 12680 34 3 60 F 80 RH 10869 27 5 ASHRAE Recommended Conditions www thermastor com sales thermastor com 2 1 Vehere Diagram A Air Intake B Humidity Sensor Control C Filters D Air Exhaust E Fan Switch F Power Cord G Drain Hose 40 Figure 1 Vehere diagram Vehere Pool amp Spa Humidity Controller 3 Installation Options 3 1 Location The Vehere can be installed in a variety of locations to meet the owner s needs other considerations include 1 Providing access to a 115 VAC power outlet 7 power cord is provided 2 Locating near a floor or other suitable drain 4 drain hose inc
16. ry 4020647 4 Flex Duct 4 x 25 4020128 6 Flex Duct 6 x 25 4020177 8 Flex Duct 8 x 25 4022126 10 Flex Duct 10 x 25 4024750 12 Flex Duct 12 x 25 4 Operation 4 1 Humidity Sensor Control The control is an adjustable switch that closes when the relative humidity of the air it senses rises to the dial set point It opens when the RH drops 4 to 6 below the set point See Fig 9 Figure 9 Vehere humidity sensor controller HL 4 2 Humidity Control Adjustment The dehumidifier will run until the desired relative humidity RH matches the control dial setting The humidity controller has been designed for simplicity of use It is marked Low Normal and High These operational settings represent the amount of humidity in the air Setting the control to the Low setting will result in a lower relative humidity than the High setting We recommend setting the controller at the Normal setting and then adjusting as you see fit moving the controller toward Low to lower the humidity and toward High to increase the level of humidity in your pool or spa area Approximate Humidity Levels Per Setting Low 35 to 45 Relative Humidity Normal 45 to 55 Relative Humidity Recommended High 55 to 65 Relative Humidity A quality humidity meter is recommended to accurately monitor humidity levels For a quote on a quality humidit
17. system It may also open if the unit is A used in a cool area below 50 F and the defrost timer is not adjusted or B stored where it is below 40 F and then started Under these conditions the unit will restart within several minutes Until the unit warms up it may cycle several times 7 6 Relay The contacts of the single pole single throw relay complete the power circuit to the compressor The contacts are closed when power is provided to the relay coil via the control circuit The control circuit includes the humidity control low pressure control defrost thermostat and timer 8 Vehere Accessories Part No Item 4025283 Vehere Remote Humidity Sensor Control 4022646 Indoor Outdoor Relative Humidity Meter 4024934 Deluxe Indoor Relative Humidity Meter 4021749 Filter 2 Filters Required 4023539 Collar Duct 12 Galv intake 4023603 Collar Assy Duct 12 Galv exhaust Optional Ventilator 4019663 Quiet Vent Exhaust Ventilator www thermastor com sales thermastor com 9 Vehere Electrical Wiring 115 VAC BLK L N et 60 Z 1PH 1 H BLK WHT GRN BLOWER BLOWER a pon CAPACITOR a n a i L3 2 lek SK wat RELAY DEFROST COMPRESSOR ae CONTACTS CONTROL rl b BLK j BLK pg Lf ORG ee 46 LO PRESSURE BLOWER OVERLOAD RELAY CONTROL MOTOR a 1 coil AFS ATR BLK BLK Z N WHT Lonmnmmo LLMs Va lo oh 0
18. te application first remove the cover from the controller by lifting the side of the controller cover over the catch tabs on both sides The cover comes off easily Figure 7 Control connection wires Figure 6 Mark mounting holes as indicated by arrows Hold the unit to the surface you would like to mount it on You will need to mark the locations for two screw holes and one square knockout to accommodate wires and the devices wire guard The wire guard tabs fit inside the wall See Fig 6 7 Once marked drill a 1 8 hole for each mounting screw location and tap the provided anchor mount into the hole Use the provided screws to then mount the humidity control to the wall Route the wiring through the hole you have created and connect wires according to the directions found in this manual Replace plastic housing 3 3 Electrical Requirements The Vehere can be plugged into any grounded 20 Amp circuit At 80 F 60 RH it draws 11 6 Amps A dedicated 20 Amp circuit is recommended Toll Free 1 800 533 7533 3 4 Condensate Removal Condensate drains by gravity via the clear hose extending from the unit Route the 4 drain hose to a floor drain Use care to keep the hose as flat to the floor as possible Keep the hose away from walk ways if possible Excessive humps or kinks will prevent proper drainage If the Vehere is located too far from a floor drain for the attached hose to reach inexpensive 1 2 PVC pipe can b
19. the responsibility of the end user The end user is responsible for normal care and proper return packaging Limitations and Exclusions This warranty does not cover any defect malfunction etc resulting from misuse abuse lack of normal care corrosion freezing tampering modification unauthorized or improper repair or installation accident acts of nature or any other cause beyond Therma Stor LLC s reasonable control If any HI E Dry Vehere part is repaired or replaced the new part shall be warranted for the balance of original warranty but all warranty periods will be extended by the period of time if any that the Vehere is out of service while awaiting covered warranty service Warranty service will be performed during normal working hours UPON THE EXPIRATION OF THE WRITTEN WARRANTY APPLICABLE TO THE HI E DRY VEHERE OR ANY PART THEREOF ALL OTHER WARRANTIES IMPLIED BY LAW INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SHALL ALSO EXPIRE ALL WARRANTIES MADE BY THERMA STOR LLC ARE SET FORTH HEREIN AND NO CLAIM MAY BE MADE AGAINST THERMA STOR BASED ON ANY ORAL WARRANTY IN NO EVENT SHALL THERMA STOR LLC IN CONNECTION WITH THE SALE INSTALLATION USE REPAIR OR REPLACEMENT OF ANY HI E DRY VEHERE OR PART THEREOF BE LIABLE UNDER ANY LEGAL THEORY FOR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES INCLUDING WITHOUT LIMITATION WATER DAMAGE THE END USER SHOULD TAKE PRECAUTIONS AGAINST SAME LOST PROFITS DELAY OR LOSS
20. y meter contact customer service at 1 800 533 7533 4 3 Fan Switch Turning the fan switch ON will cause the unit s internal blower to run continuously whether the unit is dehumidifying or not This function is desirable if the unit is used for air circulation or fresh air ventilation See Fig 10 Figure 10 Vehere fan switch 4 4 Automatic Defrost Control When the Vehere is used in a cool area frost may form on the cooling coil as it dehumidifies When frost forms our automatic defrost thermostat will periodically turn off the compressor while allowing the blower to run The blower draws air through the cooling coil and melts the frost The defrost cycle is automatic and designed for optimum performance above 50 F 4 5 Automatic Low Pressure Control If the low side refrigerant pressure drops to 15 PSIG the low pressure control opens and shuts off the compressor and blower It is an automatic reset that will close when the pressure rises to 35 PSIG This feature prevents damage to the compressor It may also open if the unit is used in a cool area below 50 F or stored below 40 F and then started Under these conditions the unit will restart within several minutes www thermastor com sales thermastor com Toll Free 1 800 533 7533 5 Ventilation AWARNING WARNING Do not use open combustion heating appliances unless equipped with power exhaust in a pool room equipped with exhaust fans Under certain c
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