VEVOR WZ-A301 User manual

Technical Support and E-Warranty Certificate www.vevor.com/support
MANIFOLD GAUGE SET
OPERATING MANUAL
MODEL: WZ-A301
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Have product questions? Need technical support? Please feel free to
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This is the original instruction, please read all manual instructions
carefully before operating. VEVOR reserves clear interpretation of our
user manual. The appearance of the product shall be subject to the
product you received. Please forgive us that we won't inform you again if
there are any technology or software updates on our product.
Model: WZ-A301
MANIFOLD GAUGE SET
OPERATING MANUAL

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Technical parameters
Safety Precautions
Safety & Warning
Warning:
1. Not exceed 80% of claimed range of manifolds when using.
2. Un-proper operation may lead to leakage or personal injury.
3. Please read manual & operation instruction of manifold or equipment.
4. The refrigeration gauge has been calibrated at the factory; however,
due to handling and shipping it may be lightly out of adjustment.To adjust,
unscrew and firmly hold center screw fixed with screwdriver and with
thumb and forefinger gripping pointer near center,gently turn pointer to
zero. Repeat carefully if not on zero.
IMPORTANT:
1. Gauges are available for most refrigerants in°F.
2. Please read before putting new equipment into operation.The
Compound Rubber forms seals around the valve stem.Tighten the valve
nut a quater to half turn to take up the set before commencing operation
and retighten as necessary to keep the seal tight.
NOTE: Check equipment manufactures catalogue or instruction sheets
Brand
Vevor
Model
WZ-A301
Measuring range:
-30~500psi
Refrigerants
R134A/ R22/ R12/R502
Product size （mm）
285×250×90
Product weight（kg）
2.1（Including all accessories）

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for specific recommendations on refrigerant charge,oil change and
service procedures for any particular piece of equipment.
WARNING! To prevent personal injury.
Wear goggles when working with refrigerants. Contact with
refrigerants may cause injury.
Wear gloves when working with refrigerants. Contact with
refrigerants may cause injury.
Incorrect use or connections may cause leaks or explosions.
Read and follow the instructions carefully and take precautions to
avoid leaks or explosions. Confirm that all associated devices are
grounded correctly before use.
CALIFORNIA PROPOSITION65 This product contains chemicals
known to the State of California to cause cancer and birth defects
or other reproductive harm.
This manifold is designed for use by technically trained
refrigeration and air conditioning service technicians. Due to the
unusually HIGH PRESSURE AND HAZARDOUS GASES IN
ALLSTSTEM is, misapplication could result in injury or death.
Manufactory warns against the sale to or use of this product by
any other than professionally trained personnel.

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Product Structure Diagram
Instruction of use
Schematic of gauge manifold installation on external drive compressor
with service valves. A-Manifold Suction Valve. B-Manifold Discharge Valve.
C-Compressor Discharge Service Valve (DSV). D-Compressor Suction
Service Valve(SSV). E-Servide Opening. 1-Purging. 2-Charging or Adding
Oil. 3-Bypassing. 4-Gauge Reading. 5-Both manifold valves are turned all
the way in. System is pumping vapor and both low and high-side pressure
are being read.

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Lines from the manifold are attached to the SSV at D and should be left
one to two turns lose while the line to the DSV should be tightened. Then
open both of the manifold valves at A and B 1/4 turn to 1/2 turn and cap
the middle opening,E.
Now turn the(DSV)Cstemin1'8 to 1/4 turn for just a moment(crack the
valve).A surge of high-pressure refrigerant will then rush through the lines
and the manifold and purge to the atmosphere at the loose connection at
D the SSv. This connection may then be tightened.Purging is necessary
to remove air and moisture from the manifold and lines. NOTE: Purging
must be held to a minimum to avoid damage to the atmosphere.
Carefully test for leaks while the manifold and its lines are under high
pressure. Correct any leak immediately.
Various service and testing operations may be performed after the
testing manifold has been installed:
1. Observe operating pressures by:
Closing valve A by turning all the way in.
Closing valve B by turning all the way in.
Cracking open back seat of valve C.
Cracking open back seat of valve D.
2. Charge refrigerant into system by:
Connecting refrigerant cylinder to E (vapor only).
Opening valve A.
Closing valve B.
Closing front seat of valve D slowly.
3. Purge condenser by:
Closing valve A.

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Closing valve B.
Cracking open valve C.
4. Charge liquid refrigerant into high side by:
Connecting refrigerant cylinder to E.
Closing valve A.
Opening valve B.
Mid-positioning valve C.
5.Build up pressure in low side for control setting or to test for leaks by:
Sealing E with seal cap.
Opening valve A.
Close valve C.
PRESSURE AND COMPOUND GAUGE RECALIBRATION
INSTRUCTIONS:
The refrigeration gauge has been calibrated at the factory; however,
due to handling and shipping, it may be slightly out of adjustment. To
adjust, unscrew the lens and firmly hold the center screw fixed with a
screwdriver, and with thumb and forefinger gripping the pointer near the
center, gently turn the pointer to zero. Repeat carefully if not on zero.
It's unavailable for wet gauge, and the wet gauge does not require
gauge zeroing.
Scope of application
For R134A/ R22/ R12/R502 Refrigerant only
Common fault analysis
fault
phenomenon
failure cause
solution
Refrigeration
agent leakage
The conversion joint gap
is too large
Tighten the switch
connector

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Address: Baoshanqu Shuangchenglu 803long 11hao 1602A-1609shi
Shanghai
Imported to AUS: Sihao Pty Ltd, 1 Rokeva Streeteastwood Nsw 2122
Australia
Imported to USA: VEVOR STORE INC, 9448 Rinchmond Pl #E
Rancho Cucamonga, California, 91730 United States Of America
REP
UK
Pooledas Group Ltd
Unit 5 Albert Edward House,
The Pavilions Preston, United Kingdom
REP
EC
SHUNSHUN GmbH
Römeräcker 9 Z2021, 76351
Linkenheim-Hochstetten, Germany

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