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This air handler unit is designed for installation in a 

level horizontal orientation onto either a ceiling or 

other suitable support surface. Using 3/8” 

stainless steel bolts and washers, hang the air 

handler from its support via the mounting slots 

provided on the top of the unit, taking care to 

engage all of the threads of the nut and 

tightening until the air handler is secure. Care 

must be taken to ensure the structural integrity of 

the supporting members and mounting hardware 

which should be rated appropriately to support 

the air handlers weight (see Specifications).  The 

supporting member shall have a minimum load 

baring capacity equivalent to 14 gauge Unistrut, 

and shall have a mounting point span no longer 

than 38 inches with direct supporting members 

installed parallel to the direction of air flow 

through the fan.  The Unistrut supports should be 

mounted to the building instillation using a 

minimum size of 3/8 inch all-thread and the 

appropriate spring nuts and washers using 

standard Unistrut installation procedures.  The 

all-thread mounting locations shall be located no 

further than 6 inches from the air handler chassis 

edges.When installing, clearances must be 

provided as a provision to allow servicing of the 

unit. Ensure that a minimum of 24” of clearance 

be provided around all lateral edges of the air 

handler unit and that adequate space is 

available to facilitate servicing of the electrical 

box, coil connections, and condensate drain.

A dust shroom/dust cover was provided with your 

air handler unit. To install, the equipment should 

be de-energized at the breaker or main 

disconnect. Attach the dust cover to the fan 

assembly using the supplied duct clamp and a 

flathead screwdriver. Verify that the dust cover is 

fully secured to the air handler prior to applying 

power to the equipment.

All wiring shall comply with local and national 

codes.  High and low voltage terminal blocks are 

provided in the unit’s electrical panel.  A 

knockout is provided in the cabinet for the 

routing of field wiring.  An on/off switch is used to 

power on the equipment which is located 

beneath the electrical box and should be 

switched on to begin normal operation.

A 24 VAC transformer and fan relay are 

provided inside the cabinet for control through 

the low voltage terminal block where 

temperature and humidity controls can be 

incorporated as needed to fulfill specific 

application needs.

The fan is connected to the power supply 

through a socket outlet on the chassis exterior.  

Do not remove this plug when in operation or try 

to operate other equipment from this 

connection.

Installation Instructions

Mechanical Installation

Electrical

Summary of Contents for Surna IsoStream SCMAHV-42

Page 1: ...Surna IsoStreamTM Air Handler Operating Maintenance Manual www surna com 303 993 5271 Models SCMAHV 42 Revised September 2015 ...

Page 2: ......

Page 3: ...mer 4 Product Suitability 4 Service Under Warranty 4 Service NOT Under Warranty 4 Parts List 5 Routine Maintenance 5 Warnings 6 Safety Symbols 6 Air Handler Safety Guide 6 Installation Instructions 8 Mechanical 8 Electrical 8 Wiring 9 Plumbing 10 Plumbing Tips 11 System Specifications 12 Wiring Diagram 14 ...

Page 4: ... product is installed or used Before purchase and use of a product review the product applications and all applicable national and local codes and be sure that the product installation and use will comply with them Service Under Warranty This product is warranted by Surna against defects due to fault in workmanship or materials If the product has been damaged under normal use it will be entitled t...

Page 5: ... provide many years of dependable trouble free comfort when properly maintained Proper maintenance will consist of routine heat exchanger cleanings biannual check ups that include but are not limited to heat exchanger inspections electric heater inspections cleaning of the internal electrical and heat transfer components by a qualified service technician Failure to provide periodic check ups and c...

Page 6: ...ure wire and cable routing to protect personnel from shock hazards Only operate the equipment with an appropriately sized breaker in place and wire sizes with adequate current carrying capacity Consult with an electrician before attempting electrical installation Using Surna Air Handler equipment in a manner not described in this manual may void its warranty and any safeties provided herein Follow...

Page 7: ...rotective earthing system prior to operation DO NOT remove the grounded connection while power is being supplied to the Surna air handling equipment Doing so presents an electric shock hazard to users and service personnel Care must be taken to ensure the structural integrity of the supporting members when mounting these devices Verify that the load bearing capacity of any mounting surface is rate...

Page 8: ...cing of the unit Ensure that a minimum of 24 of clearance be provided around all lateral edges of the air handler unit and that adequate space is available to facilitate servicing of the electrical box coil connections and condensate drain A dust shroom dust cover was provided with your air handler unit To install the equipment should be de energized at the breaker or main disconnect Attach the du...

Page 9: ...lation Connections connections could cause damage to the equipment or servicing personnel When installing the power wiring verify that the line conductor is connected to the terminal marked L and the Neutral conductor is connected to the terminal marked N A thermostat was provided installed on your unit If you elect to use an alternate thermostat or control device you can remove the pre installed ...

Page 10: ...e supplied to each air handler is 2 5 gallons per minute per ton of air handler capacity The unit will operate most efficiently with higher flow rates while low flow rates will not provide enough cooling for the unit to perform optimally The air handler s condensate drain has a built in slope for proper drainage It is important to verify that the air handler mounting surface is level so that the e...

Page 11: ...r requires 12 5 GPM to operate efficiently A higher flow rate in this range will increase the cooling efficiency of the unit Important Plumbing Tips 8 The air handler water inlet and outlets are NPT 9 The air handler is marked with IN and OUT water connections for proper direction of flow The unit will not operate properly if these connections are reversed 11 Propylene Glycol should be utilized at...

Page 12: ...12 System Specifications Dimensional and Electrical Data Elevation and Glycol Derating ...

Page 13: ...13 Cooling Data ...

Page 14: ... 1 TB1 Low Voltage Terminal Block L1 Phase Conductor Connection L2 Neutral Conductor Connection GND Ground Connection Primary Circuit Conductors Class 2 Secondary Circuit Conductors Thermostat Switch Connections 120 VAC T1 24 VAC FM L1 L2 GND BLK WHT BLK WHT RD GRN GRN C1 SO1 TB1 Use Only Copper Supply Wires ...

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Page 16: ...303 993 5271 info surna com surna com 1780 55th Street Suite A Boulder CO 80301 ...

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