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ROUTINE 

MAINTENANCE

This product is designed to provide many years 
of dependable, trouble free operation when 
properly maintained. Failure to provide periodic 
check-ups and cleaning can result in excessive 
operation cost and/or equipment failure. Required 
routine maintenance consists of coil cleaning, 
filter cleaning/changing, and condensate drain 
inspection/cleaning.

 

 

  

WARNING: Before performing any maintenance 
or service, verify unit is disconnected from power 
source. Servicing the Surna dehumidifier, with its 
high pressure refrigerant system, high voltage 
circuitry, and internal fan, presents a health hazard 
which could result in death, serious bodily injury, 
and/or property damage. DO NOT attempt 
maintenance or repairs unless you are properly 
trained to do so.

Evaporator and condenser coils can be vacuumed 
out. To access the evaporator coil, remove set screw 
and remove filter. Use caution when cleaning the 
coils. The coil fins are sharp and may cause injury 
if improperly handled. The coil fins are extremely 
delicate and can be damaged easily. Damaged coil 
fins can reduce air flow and negatively affect the 
performance of the unit. DO NOT use coil cleaner 
that is designed for outdoor coils, as it may be 
corrosive. The Surna Dehumidifier comes equipped 
with an electrostatic filter. If properly maintained, 
electrostatic filters will provide long lasting filtration. 
It is recommended to clean the filter every 30 days, 
at a minimum. Operating the unit with a dirty filter 

will reduce dehumidifier capacity and efficiency and 
may cause the compressor to unnecessarily cycle on 
and off. DO NOT operate the unit without the filter.

 

CLEANING THE FILTER 

 

1. Remove filter set screw. 
2. Remove filter.  
 

a. If the filter is ripped or physically  

 

    damaged, it should be replaced. 

3. Check filter for cleanliness. 
 

a. Hold filter up to light source, and check  

 

    for transparency.  

 

 

i. The more light showing through,  

 

 

    the cleaner the filter. 

 

 

ii. If light cannot be seen, the filter  

 

 

    needs to  be cleaned. 

4. The filter can be vacuumed out or washed with  
     water. 
 

a. When washing the filter with water, spray  

 

    water through the filter in the opposite  

 

     direction of the air flow indicator. 

 

b. When vacuuming the filter, ensure that  

 

     the  vacuum is pulling dirt and debris  

 

     from the filter in the opposite direction  

 

    of the air flow indicator. This will push  

 

    dust and debris out of the  filter  

 

     instead of into the filter. 

 

c. Airflow is indicated by a directional arrow  

 

    on the side of the filter.

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Summary of Contents for 250 PPD

Page 1: ...SURNA 250 PPD DEHUMIDIFIER OPERATING AND MAINTENANCE MANUAL surna com Model 3 250 March 2019...

Page 2: ......

Page 3: ...TABLE OF CONTENTS Specifications 4 Technical Description 5 Warnings 6 Warranty Information 8 Installation Instructions 10 Operation Instructions 18 Routine Maintenance 19 Troubleshooting 21 3...

Page 4: ...Condensate Drain 3 4 NPT ELECTRICAL Volts Phase 208 230V Single Nominal Current Draw 12 8A 12 0A Maximum Overcurrent Protection 20A Power Factor 99 PERFORMANCE 40 45 50 55 60 65 70 50 100 150 200 250...

Page 5: ...hich act like an expansion valve Refrigerant then flows to the evaporator coil The evaporator coil is where heat is transferred from the incoming air to the liquid refrigerant causing it to evaporate...

Page 6: ...adhere to all applicable safety guideline requirements in this document and all applicable electrical and mechanical jurisdictional codes Using Surna dehumidifying equipment in a manner not described...

Page 7: ...fied licensed service technician DO NOT use extension cords or plug adapters These actions may result in a fire hazard or electric shock This unit must be connected to a protective earthing system pri...

Page 8: ...bilities under this Warranty are limited to furnishing replacement equipment or parts at its option FCA Incoterms 2000 factory or warehouse f o b factory or warehouse for US domestic purposes at Compa...

Page 9: ...vidual order 1 Surna 250 PPD dehumidifier 2 Surna 250 PPD dehumidifier product manual 3 Humidistat 4 15 ft of thermostat wire 5 PVC condensate trap INTENDED APPLICATION The Surna dehumidifier is inten...

Page 10: ...ust in line with cold air exhaust from other air handling or cooling units circulatory fans Improper positioning will decrease unit efficiency and could cause damage to the unit ELECTRICAL This unit i...

Page 11: ...n overflow Use of a p trap reference figure 2 is required to avoid pressure and vacuum related issues which can negatively affect condensate drainage Following plumbing installation the system should...

Page 12: ...Pan Vent Mounting Brackets P Trap Drain Airflow In Airflow Out Ceiling 12 min clearance Exhaust min 24 Clearance Air Intake min 24 Clearance Figure 2 Installation diagram shows proper mounting of Sur...

Page 13: ...tructure in front of intake or discharge A FLOW FLOW 3 W O L F W O L F REQUIRED UNIT CLEARANCES Figure 3 Required minimum clearances for Surna dehumidifier A Minimum 12 inches 30 5 cm of clearance abo...

Page 14: ...a e l c f o s e h c n i 2 1 n i M A B Min 24 inches recommended 72 inches between 2 units with adjacent intakes FLOW FLOW FLOW FLOW B 4 FLOW FLOW 3 1 or 2 5 A A Minimum 12 inches 30 5 cm of clearance...

Page 15: ...ing fans within 3 feet recommended 72 inches from intake or discharge of unit A Min 12 inches of clearance above and below FLOW FLOW FLOW FLOW FLOW FLOW A A 3 A Minimum 12 inches of clearance above an...

Page 16: ...humidifier Oppose flow by 90 degrees for neighboring units No conditioned air discharge or circulating fans within 3 feet minimum recommended 72 inches from intake or discharge of unit A Minimum 24 in...

Page 17: ...DELAY RELAY HUMIDITY CONTROL FAN MOTOR COMPRESSOR CAP FAN RELAY COMPRESSOR RANCO TEMP CONTROL RED YELLOW BLUE BLK WHITE RED BLUE BLK RED BLUE LINE NEUTRAL WHITE COM ORANGE 240 VAC RED 24 VAC BLUE BLUE...

Page 18: ...ont of the unit to the ON position and set the provided humidity controller to the desired setting for the space A D DRAWN Mounting Brackets Filter Set Screw Dehumidistat Switch Connector ON OFF Toggl...

Page 19: ...e of the unit DO NOT use coil cleaner that is designed for outdoor coils as it may be corrosive The Surna Dehumidifier comes equipped with an electrostatic filter If properly maintained electrostatic...

Page 20: ...f it is not possible to clean the filter to the point where light is able to shine through the filter should be replaced 6 Let filter air dry for at least 10 minutes The filter can be used damp but no...

Page 21: ...istat is set to on NOTE The Surna dehumidifier is intended to operate in temperatures above 70 F 21 C and relative humidity of 45 or higher Temperature and relative humidity affect performance Contact...

Page 22: ...NOTES 22...

Page 23: ...NOTES 23...

Page 24: ...surna com 1780 55th Street Boulder CO 80301 303 993 5271 info surna com A P E 24...

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