Engineered air PD SERIES Installation, Operation And Maintenance Manual Download Page 17

A

   

PD MANUAL

 

 

IOM-39 

17 of 36 

Aug 99 R1 

 

 

To

 

calculate

 

voltage

 

imbalance

 

(NEMA

 

method)

 

refer

 

to

 

the

 

following

 

example:

 

 
 

Phase

 

to

 

phase

 

voltage

 

readings:

 

 

 

235V

 

236V

 

230V

 

 

The

 

average

 

Voltage

 

between

 

legs

 

is

  

 

(235+236+230)/3

 

=

 

233.7V

 

 

Highest

 

voltage

 

deviation

 

from

 

average

 

is:

   

233.7V

 

 

230V

 

=

 

3.7V

 

 

Voltage

 

imbalance

 

percentage

 

=

 

Highest

 

deviation

  

divided

 

by

 

average

 

X

 

100

 

 
 

3.7

 

/

 

233.7

 

x

 

100

 

=

 

1.6%

  

This

 

imbalance

 

is

 

less

 

than

 

2%

 

and

 

therefore

 

is

 

OK

 

 

If

 

voltage

 

imbalance

 

is

 

greater

 

than

 

two

 

percent

 

(2%),

 

turn

 

off

 

main

 

disconnect

 

and

 

contact

 

the

 

installing

 

electrical

 

contractor

 

to

 

have

 

the

 

voltage

 

condition

 

corrected.

 

 

16.

 

Confirm

 

field

 

wiring

 

voltage

 

drop

 

is

 

less

 

than

 

10%

 

when

 

equipment

 

is

 

operating.

 

 

17.

 

For

 

the

 

unit

 

to

 

operate

 

properly

 

a

 

system

 

air

 

balance

 

must

 

be

 

performed

 

to

 

ensure

 

correct

 

air

 

flow.

  

Failure

 

to

 

do

 

so

 

can

 

damage

 

the

 

equipment

 

and/or

 

building

 

and

 

can

 

be

 

a

 

cause

 

of

 

poor

 

indoor

 

air

 

quality.

 

 

18.

 

Coil

 

air

 

bypass

 

adjustment.

 

For

 

most

 

pool

 

applications

 

there

 

will

 

be

 

an

 

air

 

bypass

 

section

 

around

 

the

 

evaporator

 

coil.

 

This

 

section

 

allows

 

a

 

portion

 

of

 

air

 

to

 

bypass

 

the

 

evaporator

 

coil

 

allowing

 

the

 

evaporator

 

to

 

have

 

the

 

most

 

efficient

 

moisture

 

removal.

 

The

 

bypass

 

is

 

factory

 

set

 

to

 

a

 

default

 

value

 

and

 

must

 

be

 

field

 

adjusted

 

to

 

ensure

 

proper

 

operation

.

  

With

 

the

 

system

 

running

 

at

 

full

 

load

 

conditions,

 

install

 

refrigeration

 

gauges.

 

Adjust

 

the

 

bypass

 

damper

 

to

 

maintain

 

a

 

suction

 

pressure

 

that

 

corresponds

 

to

 

a

 

saturated

 

suction

 

temperature

 

as

 

specified

 

in

 

the

 

unit

 

function

 

(and/or

 

the

 

submittal),

 

typically

 

a

 

saturated

 

suction

 

temperature

 

of

 

40°F

 

to

 

45°F

 

(5°C

 

to

 

7°C).

 

Too

 

much

 

bypass

 

air

 

and

 

the

 

coils

 

may

 

freeze.

 

Not

 

enough

 

bypass

 

air,

 

and

 

the

 

coil

 

may

 

not

 

remove

 

enough

 

moisture

 

to

 

satisfy

 

the

 

zone

 

conditions.

 

 

19.

 

Damper

 

sections:

 

 

a)

 

Flat

 

mixing

 

dampers:

 

Both

 

the

 

fresh

 

air

 

and

 

return

 

air

 

dampers

 

are

 

fully

 

open

 

when

 

the

 

dampers

 

are

 

at

 

a

 

45°

 

angle

 

when

 

fully

 

stroked.

 

This

 

provides

 

optimum

 

mixing

 

of

 

the

 

air

 

streams

 

for

 

this

 

damper

 

arrangement.

 

 

b)

 

Angle

 

mixing

 

damper:

 

Angle

 

mixing

 

section

 

dampers

 

open

 

to

 

an

 

angle

 

of

 

90°

 

when

 

fully

 

stroked.

 

This

 

provides

 

optimum

 

mixing

 

of

 

the

 

air

 

streams

 

for

 

this

 

damper

 

arrangement.

 

 

20.

 

Allow

 

system

 

to

 

operate

 

until

 

stable

 

running

 

conditions

 

have

 

been

 

established.

 

 

21.

 

Check

 

and

 

record

 

amperage

 

draw

 

of

 

each

 

motor

 

and

 

compressor.

 

Refer

 

to

 

unit

 

label

 

for

 

running

 

full

 

load

 

amps

 

of

 

motors

 

and

 

compressors.

 

 

Summary of Contents for PD SERIES

Page 1: ...TORY USA HEAD OFFICE AND FACTORY CANADIAN EASTERN FACTORY 1401 HASTINGS CRES SE CALGARY ALBERTA T2G 4C8 Ph 403 287 2590 Fx 888 364 2727 32050 W 83rd STREET DESOTO KANSAS 66018 Ph 913 583 3181 Fx 913 5...

Page 2: ...And Degreasing Of Water And Glycol Coils 14 Heat Transfer Fluids 14 Pool Water Piping 15 Before Start Up 15 Start Up Check List 15 Operation 19 Cooling Components 19 Refrigerant Handling 21 Compressor...

Page 3: ...o control the relative humidity to minimize the associated problems The primary function of a pool dehumidifier PD series unit is to manage the humidity levels within the facilities This helps to redu...

Page 4: ...lterations or where ENGINEERED AIR s installation and service requirements have not been met The foregoing warranty is in lieu of all other warranties express or implied ENGINEERED AIR specifically di...

Page 5: ...internal damage Remove protective covers and check for internal damage Replace covers if the unit is not being assembled or installed at this time Open access doors and check for internal damage Close...

Page 6: ...e Part 1 C S A Standard C22 1 Provincial and Local Codes and in accordance with the local authorities having jurisdiction 2 This unit shall be electrically grounded in accordance with the latest editi...

Page 7: ...ion 5 The installation of this unit shall be in accordance with all other National State and Local Codes and in accordance with the local authorities having jurisdiction MINIMUM CLEARANCE TO COMBUSTIB...

Page 8: ...nstructed on a structural steel base frame The unit base frame is equipped with lifting lugs specifically located to facilitate proper lifting of the unit Spreader bars must be used to keep rigging aw...

Page 9: ...the unit As a minimum sleepers that are installed perpendicular to the length of the unit must be continuous across the width of the unit and shall be installed at the end lifting point base rails and...

Page 10: ...ame of adjacent sections This may require personnel to work under the unit during assembly Injury or death can result from improper support or improper loading of the curb Additional temporary support...

Page 11: ...led unit When ordered factory installed pipe chases and or electrical chases are built into the unit floor Factory chases are provided with covers that need to be replaced and sealed after piping and...

Page 12: ...ad Amps 1 Maximum Total Length of Run 50 Ft 100 Ft 150 Ft 200 Ft 250 Ft 300 Ft 350 Ft 400 Ft 450 Ft 500 Ft 15 m 30 m 45 m 60 m 75 m 90 m 105 m 120 m 135 m 150 m 1 16 AWG 16 AWG 16 AWG 16 AWG 16 AWG 16...

Page 13: ...coil connections when installing piping For refrigerant coils all piping is to be installed by a qualified refrigeration mechanic All refrigeration specialties shall be installed using good refrigera...

Page 14: ...rain traps FLUSHING AND DEGREASING OF WATER AND GLYCOL COILS Coil tubing may contain material or residue from manufacturing transportation or storage To prevent possible damage to other components in...

Page 15: ...pass any interlock or safety switches under any circumstances The start up and operation must be in accordance with safe practices Start up must be performed by qualified personnel Complete attached s...

Page 16: ...kwards will typically have low head pressure high suction pressure and are usually noisy Screw compressors MUST be checked with a phase meter before starting If rotation is incorrect instantaneous per...

Page 17: ...orator coil allowing the evaporator to have the most efficient moisture removal The bypass is factory set to a default value and must be field adjusted to ensure proper operation With the system runni...

Page 18: ...possible for conditions other than low refrigerant charge to cause the sight glass to bubble Bubbling may occur when condenser fans cycles on superheat setting is too low or filter drier is plugged e...

Page 19: ...ur wiring diagram to verify that all remote controls are properly located and correctly field wired Dehumidification systems first cool the air with an evaporator coil operating below the dew point te...

Page 20: ...or a separate device 4 Head Pressure Control Head pressure controls are designed to maintain an adequate operating head pressure to allow the TX valve and other components to work correctly Low head...

Page 21: ...R134a 150 psig 1040 kPa R407C 270 psig 1870 kPa R410A 370 psig 2550 kPa Caution When recovering refrigerant from a system equipped with a water cooled condenser the water valve must be manually opened...

Page 22: ...the oil completely and add the compressor manufacturers measured oil charge for replacement compressors before placing the compressor into operation Contact the compressor manufacturer for the type a...

Page 23: ...refrigerant into the system slowly until the system sight glass is clear The system must be at design air flow and load If the system is equipped with an Engineered Air Intercooler sight glass only r...

Page 24: ...igerant and the rest of the circuit will be out of gas 4 To check for refrigerant in the inactive coil install a refrigerant gauge on the inactive condenser coil reheat pool heat or condenser coil and...

Page 25: ...nt determine and fix the cause Properly remove and dispose of the contamination Properly clean and sanitize the affected area using only approved sanitizers suitable for HVAC equipment To provide a ma...

Page 26: ...ssible without slipping in the pulley grooves Belt deflection 3 4 19mm for each foot 300mm of span between the pulleys FOR FANS EQUIPPED WITH PILLOW BLOCK BEARINGS Belt Deflection Allow 1 64 0 4mm of...

Page 27: ...15 16 49mm 69 in lb 7 8 Nm 155 in lb 17 5 Nm 228 272 in lb 26 31 Nm 2 3 16 56mm 87 in lb 9 8 Nm 155 in lb 17 5 Nm 228 272 in lb 26 31 Nm 2 7 16 62mm 147 in lb 16 6 Nm 155 in lb 17 5 Nm 228 272 in lb...

Page 28: ...2000 2500 3000 3500 4000 4500 Shaft DIA 11 16 3 3 2 1 1 1 1 1 1 15 16 2 7 16 3 2 2 1 1 2 11 16 2 5 16 2 2 1 1 3 7 16 3 15 16 1 1 Suggested initial greasing interval If safety permits re lubricate whi...

Page 29: ...ease having these properties are Shell Alvania No 2 Mobil Mobilith AW2 Mobilith SHC100 Texaco Premium RB2 American Rykon Premium 2 Lubricate bearings prior to extended shutdown or storage and rotate s...

Page 30: ...E 20 160 SAE 30 180 SAE 40 Static oil level should be at the center of the lower most roller do not overfill MOTOR LUBRICATION Refer to motor manufacturer for lubrication recommendations On motors hav...

Page 31: ...the best service interval To clean rinse with water Shake off excess water and re install These filters do not require an oil adhesive Pleated Throwaway and or Replaceable Media Cartridge Bag Replace...

Page 32: ...C glycol or other suitable fluid COATING MAINTENANCE Most natatorium HVAC equipment will have an epoxy interior coating Regularly inspect the coating for integrity Touch up epoxy paint is readily avai...

Page 33: ...capacity and increased refrigerant head pressure Should this condition occur the condenser coil should be chemically cleaned or replaced Air Cooled The external surface of finned coils can be cleaned...

Page 34: ...noted above or the maximum rated working pressure of the receiver or 90 of the receiver PRV Hot gas bypass Start to open pressure 52 psig 350 kPa 30 psig 210 kPa 105 psig 720 kPa CFC1 Cut In 290 psig...

Page 35: ...ssor discharge temperature switch tripped Reset switch and check refrigerant charge Ice formation on evaporator coil Cold inlet temperature Raise the entering air temperature Air filters dirty Replace...

Page 36: ...scharge Compressor 1 psig psig Compressor 2 psig psig Compressor 3 psig psig Compressor 4 psig psig Compressor 5 psig psig Compressor 6 psig psig Compressor 7 psig psig Compressor 8 psig psig Condense...

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