manualshive.com logo in svg

Hansen FM-71, Installation Manual

Share
Download
Hansen FM-71 Installation Manual Download Page 9

9

F100d 

JAN 2011

TYPICAL DEFROST APPLICATIONS

These  are  only  examples  of  possible  control  valve  schemes.    As  always,  they  are  provided  only  to  assist 

system designer in applying and selecting valves and controls.  Ultimately, designer is responsible for safe and 
satisfactory operation of any defrost system.  

HOT GAS SOLENOID VALVE

SOFT GAS SOLENOID VALVE

HOT GAS LINE

LIQUID SOLENOID VALVE

LIQUID LINE

OVERFEED

WITH ELECTRIC SHUT-OFF.

STOP VALVE, OR REGULATOR

OR GAS-POWERED SUCTION

 SUCTION SOLENOID VALVE,

EQUALIZE SOLENOID VALVE

OVERFEED

SUCTION LINE

FAN

CHECK

VALVE

PAN

REGULATOR

DEFROST RELIEF

HOT GAS LINE

SOFT GAS SOLENOID VALVE

HOT GAS SOLENOID VALVE

CHECK

VALVE

PAN

FAN

LIQUID SOLENOID VALVE

WITH ELECTRIC SHUT-OFF.

STOP VALVE, OR REGULATOR

OR GAS-POWERED SUCTION

 SUCTION SOLENOID VALVE,

FOR EQUALIZING

WITH WIDE OPENING FEATURE

DEFROST RELIEF REGULATOR

OVERFEED

LIQUID LINE

SUCTION LINE

OVERFEED

BOTTOM FEED EVAPORATOR

TOP FEED EVAPORATOR

EVAPORATOR WITH GAS-POWERED 

SUCTION STOP VALVE

EVAPORATOR WITH DEFROST 

CONDENSATE LIQUID DRAINER

DEFROST RELIEF

HOT GAS SOLENOID VALVE

SOFT GAS SOLENOID VALVE

HOT GAS LINE

LIQUID LINE

OVERFEED

SUCTION LINE

OVERFEED

CHECK

VALVE

FAN

EQUALIZE SOLENOID VALVE

LIQUID SOLENOID VALVE

STOP VALVE

GAS-POWERED SUCTION

PAN

REGULATOR

OVERFEED

SOFT GAS SOLENOID VALVE

HOT GAS SOLENOID VALVE

HOT GAS LINE

LIQUID LINE

OVERFEED

SUCTION LINE

VALVE

CHECK

FAN

EQUALIZE SOLENOID VALVE

LOADED

DEFROST CONDENSATE

LIQUID SOLENOID VALVE

 SUCTION SOLENOID VALVE,

OR GAS-POWERED SUCTION

STOP VALVE.

PAN

OUTLET PRESSURE

REGULATOR

CHECK VALVE

LIQUID DRAINER

Summary of Contents for FM-71

Page 1: ... specifically for defrosting industrial and large commercial refrigeration systems the Frost Master sequences solenoid valves and relays to provide quick and efficient defrosting of evaporator coils Because of its SPDT relays and time adjustable defrost steps this controller is suitable for almost every defrost application including top and bottom feed unit coolers blast freezer evaporators and ic...

Page 2: ...of defrosts per day or week by not defrosting unless necessary the time clock can be used to prevent defrost from happening when it would not be advantageous Temperature terminate contacts are provided to optionally connect a thermostat or other device for minimized defrost time The Remote Initiate models clockless require only an external momentary dry contact closure of the initiate terminals fr...

Page 3: ... begins Less liquid means more internal evaporator surface is exposed to entering hot gas It also reduces the amount of liquid accommodated by the system during defrost HOT GAS 0 to 45 minutes The HOT GAS step begins the actual melting of the frost accumulation The amount of time required to remove the frost is dependent on many factors including the following design of evaporator quantity of fros...

Page 4: ...and a time clock tab must trip before a defrost will begin In other words initiate for a clock equipped defrost controller will only occur if called for by an initiation device during a clock scheduled defrost period On the other hand a clockless Remote Initiate Model FM 01 FM 02 FMP 01 could initiate defrost any time the initiate device closed the terminals The Frost Master is supplied with a fac...

Page 5: ...vaporator shown on page 9 Other wiring schemes are possible to meet system requirements This wiring diagram is for illustration purposes only and does not show all controls and safety devices Final control wiring is the responsibility of the system designer See above table for relay operation Relays shown with no power to Frost Master See above for relay operation relay energized POWER INPUT RELAY...

Page 6: ...sture Field sensor wire size should be at least 20 AWG 0 5 mm2 and limited to a distance of 500 ft 152 m Avoid running wires through evaporator air stream or with high voltage wiring Connect field sensor wires to terminate temperature sensor quick disconnect plug inside defrost controller enclosure terminate temperature sensor INTRODUCTION This deluxe model Frost Master Plus includes an additional...

Page 7: ...ator shown on page 9 Other wiring schemes are possible to meet system requirements This wiring diagram is for illustration purposes only and does not show all controls and safety devices Final control wiring is the responsibility of the system designer See above table for relay operation Relays shown with no power to Frost Master Plus See above for relay operation relay energized POWER INPUT RELAY...

Page 8: ...al Typically the defrost relief regulator is set at about 70 psig 5 bar for ammonia When a defrost condensate liquid drainer is used an outlet pressure regulator in the hot gas supply line should be used to limit the internal evaporator pressure Check valves are installed after the liquid solenoid valve to prevent higher pressure gas from entering the liquid supply line during defrost Also check v...

Page 9: ...NOID VALVE WITH ELECTRIC SHUT OFF STOP VALVE OR REGULATOR OR GAS POWERED SUCTION SUCTION SOLENOID VALVE FOR EQUALIZING WITH WIDE OPENING FEATURE DEFROST RELIEF REGULATOR OVERFEED LIQUID LINE SUCTION LINE OVERFEED BOTTOM FEED EVAPORATOR TOP FEED EVAPORATOR EVAPORATOR WITH GAS POWERED SUCTION STOP VALVE EVAPORATOR WITH DEFROST CONDENSATE LIQUID DRAINER DEFROST RELIEF HOT GAS SOLENOID VALVE SOFT GAS ...

Page 10: ...frost melting can begin Typical rating at 86ºF to 10ºF is 7 5 lbs min 0 063 kg sec for ammonia and 24 5 lbs min 0 117 kg sec for R22 For greater capacities contact factory Inlet outlet connections combination FPT 1 Weld HD101 dEFROST CONDENSATE LIQUID DRAINER Mechanical non electrical float regulator drains liquid condensate from evaporator during defrost It has built in gas vent plus expansion va...

Page 11: ...se requires no pressure drop to operate Requires a single pilot solenoid valve to control Typically used to close off evaporators from system suction especially below 20F 30C HS9B GAS POWERED SOLENOID VALVE This valve uses a remote gas or liquid pressure source to close requires no pressure drop to operate Dual pilot solenoid valve assembly controls opening and closing of valve without internal bl...

Page 12: ...me of day and defrost start times WARRANTY Hansen defrost controllers are guaranteed against defective materials or workmanship for 90 days F O B our plant No consequential damages or field labor is included REMOTE INITIATE MODELS Remote Initiate Models FM 01 FM 02 and FMP 01 are supplied less any time clock and horizontal jumper wire The defrost begins when the initiate spade terminals are moment...

Reviews:

No comments

Brands by name

Popular brands

Load more brands