Day and Night WCH**4 Panduan Petunjuk Instalasi - Halaman 8

Jelajahi secara online atau unduh pdf Panduan Petunjuk Instalasi untuk Pompa Panas Day and Night WCH**4. Day and Night WCH**4 18 halaman. R?410a split system heat pump

Halaman Cetak

INSTALLATION INSTRUCTIONS

Deep Vacuum Gauge Response

Figure 9

and System Conditions

5000

4500

4000

3500

3000

2500

2000

1500

1000

500

MINUTES

Triple Evacuation Method

The triple evacuation method should only be used when

system does not contain any water in liquid form and vacuum

pump is only capable of pulling down to 28 inches of mercury

(711mm Hg). Refer to Fig. 8 and proceed is as follows:

Pull system down to 28 inches of mercury (711mm

Hg) and allow pump to continue operating for an

additional 15 minutes.

Close manifold valves or valve at vacuum pump and

shut off vacuum pump.

Connect a nitrogen cylinder and regulator to system

and fill with nitrogen until system pressure is 2 psig.

Close nitrogen valve and allow system to stand for 1

hour. During this time, dry nitrogen will diffuse

throughout the system absorbing moisture.

Repeat this procedure as indicated in Figure 8.

After the final evacuate sequence, confirm there are

no leaks in the system. If a leak is found, repeat the

entire process after repair is made.

Figure 8

Triple Evacuation Sequence

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

BREAK VACUUM WITH DRY NITROGEN

WAIT

EVACUATE

CHECK FOR TIGHT, DRY SYSTEM

(IF IT HOLDS DEEP VACUUM)

CHARGE SYSTEM

LEAK IN

SYSTEM

VACUUM TIGHT

TOO WET

TIGHT

DRY SYSTEM

R−410A Split System Heat Pump

I. OPENING SERVICE VALVES

Outdoor units are shipped with a refrigerant charge

sealed in the unit. Opening the service valves releases

this charge into the system.

NOTE: Open the Suction service valve first. If the Liquid

service valve is opened first, oil from the compressor may

be drawn into the indoor coil TXV, restricting refrigerant

flow and affecting operation of the system.

Remove Suction service valve cap and insert a hex

wrench into the valve stem. Hold the valve body steady

with an end−wrench and back out the stem by turning the

hex wrench counterclockwise. Turn the stem until it just

contacts the rolled lip of the valve body.

After the refrigerant charge has bled into the system,

open the Liquid service valve.

NOTE: These are not back−seating valves. It is not

necessary to force the stem tightly against the rolled lip.

The service valve cap is a primary seal for the valve and

must be properly tightened to prevent leaks. Make sure

cap is clean and apply refrigerant oil to threads and

sealing surface on inside of cap.

Tighten cap finger tight and then tighten additional 6 of a

turn (1 wrench flat) to properly seat the sealing surfaces.

J. GAUGE PORTS

Check for leaks at the schrader ports and tighten valve

cores if necessary. Install plastic caps finger tight.

ELECTRICAL WIRING

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in

personal injury or death.

Before installing, modifying or servicing system,

main electrical disconnect switch must be in the

OFF position. There may be more than 1

disconnect switch. Lock out and tag switch with a

suitable warning label.

Supply voltage must be 208/230 volts (197 volt minimum

to 253 volts maximum) 60 Hz single phase.

Outdoor units are approved for use with copper

conductors only. Do not use aluminum wire.

Refer to unit rating plate for minimum circuit ampacity and

circuit protection requirements.

Grounding

Permanently ground unit in accordance with the National

Electrical Code and local codes or ordinances. Use a

copper conductor of the correct size from the grounding

lug in control box to a grounded connection in the service

panel or a properly driven and electrically grounded

ground rod.

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