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September 2020

 

5

 

Quest IQ Dry Cooler OMM

 

 
 
 

 

 

 

 

 

 

 

 

 

 

Optional 

Installed 

Disconnect.

 

 

Other equipment 
integration

. Cooler 

could be directly 
integrated/attached 
into system/equipment 
it serves (mounted on 
the same frame and 
piped and wired at the 
factory). Alternatively, it 
could be provided as 
stand-alone piece of 
equipment, that has to 
be installed and 
connected to the 
equipment/system it 
serves on site. 

 

Control 

(for more 

details 

 see 

Basic 

Operation

 Chapter):

 

o

 

Controls by 
others

 

o

 

Stand-alone 
(self-
controlled): 
cooler is 
equipped with 
aquastat to 
control based 
off fluid 
temperature.

 

 

Dehumidifier-
Controlled

. Dry coolers 

can be controlled by up to three Dehumidified Air Solutions dehumidifiers.  

 

Pump package

 (optional). As needed, dry 

cooler could be equipped with pump package 

 to establish cooling media flow (or to serve 

as additional/booster pump).  

o

 

For multi-fans coolers: 

If pump 

package is required, each “two

-

fan” 

section, normally, would get its own 
package (Pic. C.2-c shows NG-V-62 
type cooler, equipped with six pump 
packages 

 one per section). 

 

Discharge Airflow 

 Dry cooler Installation

All dry coolers are designed for vertical air 
discharge (horizontally mounted cooler). 

 

Pic. C.2

 

a

 

b

 

c

 

Summary of Contents for IQ Series

Page 1: ...Dry Coolers OPERATION AND MAINTENANCE MANUAL QuestClimate com IQ SERIES GROW ROOM HVAC ...

Page 2: ...c Data 6 Operation and Control 7 Layout and Components 9 Dry cooler Main Components 9 Electrical Box Power and Control 10 Pump Package 11 Basic Maintenance 12 Maintenance and Safety 12 Maintenance Key Points 12 Routine Maintenance Program 12 Specific Components Maintenance and Special Tasks 13 Airside Coil s Cleaning 13 Dry cooler Service 13 Warranty 14 ...

Page 3: ...RATIONS MAINTENANCE OR SERVICE TASKS Only qualified technicians should install operate maintain or service mechanical equipment including current dehumidification system Read this manual before performing any tasks to familiarize yourself with the equipment as well as with any potential hazards Always exercise caution Beware of electrical power and high electrical voltage Follow proper safety proc...

Page 4: ...n Installation and Service Contractors WARNING Any work installation start up service maintenance repair etc on any mechanical equipment HVAC system dry cooler etc must be performed in accordance with manufacturer s recommendations as well as submittal documentation local Codes and Regulations and appropriate field practices Failure to do so could result in personal injury equipment damage or malf...

Page 5: ...e unit o Cooler capacity and number of fans are reflected in its type nomenclature Pic C 2 c shows NG V 62 cooler comprised of six two fans two coils NG V 12 sections Fan type NG series dry coolers have EC motor fans varying speed via 0 10vdc signal See submittal and wiring diagram Cooling media Typically water glycol rust inhibitor infused food grade propylene glycol is used mixture is used as co...

Page 6: ...lf controlled cooler is equipped with aquastat to control based off fluid temperature Dehumidifier Controlled Dry coolers can be controlled by up to three Dehumidified Air Solutions dehumidifiers Pump package optional As needed dry cooler could be equipped with pump package to establish cooling media flow or to serve as additional booster pump o For multi fans coolers If pump package is required e...

Page 7: ...the factory Self controlled dry coolers normally do not require external controls connected Equipment Specific Data Specific information for individual dry cooler is provided in the following methods System Nameplate Pic C 3 the manufacturer tag attached to the dry cooler that includes its most critical data General data including Serial Number and Dry cooler Model nomenclature o Serial Number is ...

Page 8: ...pending on the type of fans modulating EC type or two speed control type and command received cooler total airflow is adjusted by varying fan s speed and or number of operating fans Cooling media flow must be established also either by separately controlled pump part of the external system or by the built in pump package pump In latter case pump would engage with the fan s and will stay engaged wh...

Page 9: ...ype are modulating 0 10VDC It may control the fan according to head pressure or another control method chosen by installer Self controlled stand alone Dry cooler Fan s speed signal modulating is based on built in control device Most commonly used one is an aquastat monitoring temperature of the cooling media water glycol mixture leaving the dry cooler o Typically aquastat is pre set to maintain en...

Page 10: ...n on Pic D 1 below While layout and main components are similar for all applicable dry coolers there are some deviations number of fans and coils composition etc Refer to Views and Options Basic Information chapter for additional information Dry cooler Main Components 32 36 35 33 37 31 Pic D 1 33 31 32 36 35 33 34 37 31 31 ...

Page 11: ... below For NG Z type Fig 3 ONLY Said dry cooler ships with set of legs 34 to provide sufficient space between horizontal mounting surface and airflow intake On site assembly is required for these legs For more details on the installation refer to the Installation Manual Electric power is normally to be brought to disconnect 35 if cooler is equipped with such which feeds it to the electrical box 36...

Page 12: ...e that the package used with NG V coolers is normally mounted onto the cooler directly however it also could be provided separately Pump 38 establishes glycol mixture circulation through the dry cooler and dehumidifier Expansion tank 39 compensates for temperature based glycol cooling fluid volume fluctuation The pump package electrical sub panel 40 contains the pump package electrical power and c...

Page 13: ...the details as eeded and some hot warm surfaces Before performing any equipment maintenance work make sure that all moving parts are stopped and it is safe to perform required task Maintenance Key Points Dry cooler is rather low maintenance equipment yet there are some basic key maintenance considerations Ensure that the equipment is accessible minimum clearances are maintained approaches are not ...

Page 14: ... instructions Thoroughly rinse both sides of the coil and the drain pan with clean water Straighten any coil fins that have been bent during the cleaning process Replace all panels and parts and restore electrical power to the equipment Dry cooler Service Normally dry coolers are filled with glycol mixture to prevent the system and the dry cooler from freezing and potentially rupturing pipes when ...

Page 15: ...ty During the first 90 days from initial start up all parts and repairs related to factory defects or replacement parts are covered by the Quest manufacturer warranty All parts and labor requirements will either be handled by DASV technicians directly or managed and approved in advance by DASV through DASV authorized technicians Internet Connected Conditional One Year Repair Warranty If and only i...

Page 16: ...ts on which payment is in default 2 Parts that wear out due to normal usage such as air filters fuses and sensors are not covered by this warranty NOTE Refrigerant lost during the Initial 90 day Comprehensive or Internet Connected Conditional One Year Repair Warranty will be reimbursed in accordance to the current market price of refrigerant at the time of repair and upon discretion of Customer Su...

Page 17: ...he foregoing limitations and exclusions shall not apply to the extent of the legislation however in such case the balance of the above warranty shall remain in full force and effect This warranty gives specific legal rights Other rights may vary according to local legislation Force Majeure Quest will not be liable for delay or failure to provide warranty service due to government restrictions or r...

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